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MULTIMEDIA SYNCHRONIZATION SYSTEM AND METHOD

Thu, 03 Nov 2016 08:00:00 EDT

A multimedia synchronization system used in a wireless local area network is provided. The multimedia synchronization system includes a first multimedia device and a second multimedia device. The first multimedia device wirelessly transmits a beacon, in which the beacon includes a timestamp. The second multimedia device is connected to the first multimedia device through the wireless local area network for receiving the beacon from the first multimedia device and synchronizing with the first multimedia device according to the timestamp of the beacon.



VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND PROGRAM

Thu, 03 Nov 2016 08:00:00 EDT

Although a video encoding device multiplexes ctu_pcm_flag syntax indicating whether all image blocks belonging to a coding tree unit as a set of image blocks are PCM blocks, at the top of the coding tree unit, when all image blocks belonging to the coding tree unit are PCM blocks, at least cu_split_flag syntax indicative of the splitting pattern of the coding tree unit is not multiplexed to transmit PCM data efficiently.



METHOD AND APPARATUS FOR PERFORMING AN ARITHMETIC CODING FOR DATA SYMBOLS

Thu, 03 Nov 2016 08:00:00 EDT

Disclosed herein is a method of performing an arithmetic coding for data symbols, comprising: creating an interval for each of the data symbols, the interval being represented based on a starting point and a length of the interval; updating the interval for each of the data symbols using a multiplication approximation; and calculating the multiplication approximation of products using bit-shifts and additions within the updated interval.



PARAMETERIZATION FOR FADING COMPENSATION

Thu, 03 Nov 2016 08:00:00 EDT

Techniques and tools for performing fading compensation in video processing applications are described. For example, during encoding, a video encoder performs fading compensation using fading parameters comprising a scaling parameter and a shifting parameter on one or more reference images. During decoding, a video decoder performs corresponding fading compensation on the one or more reference images.



Methods and Apparatus for Use of Adaptive Prediction Resolution in Video Coding

Thu, 03 Nov 2016 08:00:00 EDT

A method and apparatus for use of an adaptive prediction resolution in video coding is disclosed. One or more adaptive flags are provided in one or more syntaxes of a prediction scheme in encoding and decoding video signals. In one embodiment, the adaptive flags are suitable to indicate whether a subset or a full set of intra prediction modes is used at a slice level or a coding block level. In one embodiment, the adaptive flags are suitable to indicate whether integer or fractional motion vector resolution is used at a slice level or a coding block level.



REFERENCE PICTURE SELECTION FOR INTER-PREDICTION IN VIDEO CODING

Thu, 03 Nov 2016 08:00:00 EDT

A method of encoding a digital video is provided that improves inter-prediction for encoding using reference pictures. The method includes loading a sub-picture and a list of a plurality of candidate reference pictures at a video encoder, generating a plurality of candidate motion vectors by performing an integer-pel motion estimation operation, calculating a motion estimate score for each of the plurality of candidate motion vectors and selecting the one of the plurality of candidate reference pictures that is associated with the best motion estimate score as a best-match reference picture, performing additional integer-pel motion estimation operations on the best-match reference picture at one or more lower coding levels than the first coding level, refining motion vectors associated with the best-match reference picture at the first coding level and the one or more lower coding levels using fractional-pel motion estimation operations, and encoding the motion vectors into a bitstream.



Constructing Inter-Layer Reference Picture Lists

Thu, 03 Nov 2016 08:00:00 EDT

A method (200) of constructing at least one list of reference pictures for inter-layer prediction of a current picture is provided. The method comprises inserting (210) reference pictures into a first set of reference pictures or a second set of reference pictures, based on respective values of a scalability identifier associated with the reference pictures and a value of the scalability identifier associated with the current picture, and inserting (220) the first set of reference pictures and the second set of reference pictures into the at least one list of reference pictures. By taking indications for similarities between reference layers and the current layer into account, a more efficient multi-layer video compression is achieved. Further, a corresponding computer program, a corresponding computer program product, and a corresponding device are provided.



MOVING PICTURE CODING DEVICE, MOVING PICTURE CODING METHOD AND MOVING PICTURE CODING PROGRAM, AND MOVING PICTURE DECODING DEVICE, MOVING PICTURE DECODING METHOD AND MOVING PICTURE DECODING PROGRAM

Thu, 03 Nov 2016 08:00:00 EDT

A merging motion information candidate generation unit derives, when information indicating whether or not to derive a merging motion information candidate shared for all prediction blocks in a coding block is information indicating the derivation of a merging motion information candidate shared for all the prediction blocks in the coding block, a plurality of merging motion information candidates shared for all the prediction blocks in the coding block. A merging motion information selection unit selects one merging motion information candidate from the plurality of merging motion information candidates and uses the selected merging motion information candidate in a prediction block subject to coding.



Method and apparatus for producing a video stream

Thu, 03 Nov 2016 08:00:00 EDT

A method of processing a stream of images comprises obtaining an image of a scene with a relatively short exposure time (SET) and obtaining an image of the same scene with a relatively longer exposure time (LET). Motion blur characteristics for the SET image corresponding to motion within the LET image are determined and the motion blur characteristics are applied to the SET image. The blurred SET image and the LET image are blended to provide a HDR image. The process is repeated for successive pairs of images in the stream to provide a sequence of HDR images which can be encoded in a video stream.



IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD

Thu, 03 Nov 2016 08:00:00 EDT

There is provided an image processing apparatus including circuitry configured to predict an image of a second layer from an image of a first layer using a lookup table which maps combinations of a luminance component, a first color difference component, and a second color difference component of the first layer to predicted pixel values of the second layer corresponding to the combinations. The second layer has a different color gamut from the first layer. The circuitry uses the lookup table in which granularities of the first and second color difference components are lower than a granularity of the luminance component.



Method and Apparatus for Major Color Index Map Coding

Thu, 03 Nov 2016 08:00:00 EDT

A method and apparatus for palette coding of a block of video data using multiple color index scanning orders are disclosed. The system determines a scanning direction for the current block, where the scanning direction is selected from a scan group consisting of at least one non-horizontal scan. If the non-horizontal scan is used, the color indices of the current block are encoded or decoded according to the non-horizontal scan using a palette or a triplet palette. In another embodiment, the system uses a transposed color index map to code the color indices.



METHOD FOR INDUCING A MERGE CANDIDATE BLOCK AND DEVICE USING SAME

Thu, 03 Nov 2016 08:00:00 EDT

The present invention relates to a method for inducing a merge candidate block and a device using same. An image decoding method involves decoding motion estimation region (MER) related information; determining whether or not a predicted target block and a spatial merge candidate block are included in the same MER; and determining the spatial merge candidate block to be an unavailable merge candidate block when the predicted target block and the spatial merge candidate block are included in the same MER. Accordingly, by parallelly performing the method for inducing a merge candidate, parallel processing is enabled and the computation amount and implementation complexity are reduced.



METHOD AND APPARATUS FOR MANAGING BUFFER FOR ENCODING AND DECODING MULTI-LAYER VIDEO

Thu, 03 Nov 2016 08:00:00 EDT

Provided is a multi-layer video decoding method for efficiently obtaining, from a bitstream, information indicating a maximum size of a decoded picture buffer (DPB) regarding a layer set including a plurality of layers.



Method and Apparatus for Palette Initialization and Management

Thu, 03 Nov 2016 08:00:00 EDT

A method and apparatus for palette coding of a block of video data by initializing the palette or triplet palette or using a selected palette or triplet palette from a preceding image area for the beginning block of the current image area are disclosed. The method receives input data associated with a current image area consisting of multiple blocks. For the beginning block, the palette predictor is determined based on an initial palette or triplet palette or based on a selected palette or triplet palette associated with a selected block located at a location before the end of a preceding image area. For blocks of the current image area, palette coding is applied to the blocks, where at least one block uses the palette predictor for the beginning block as the palette predictor.



Bitstream Generation and Processing Methods and Devices and System

Thu, 03 Nov 2016 08:00:00 EDT

Provided are a bitstream generation method and apparatus, a bitstream processing method and apparatus, and a system. The bitstream generation method includes that: it is judged whether it is needed to execute a Picture Order Count (POC) alignment operation on an entire bitstream and/or a part of the bitstream according to an application requirement; and identification and control information is written into the bitstream according to a judgment result, wherein the identification and control information includes: information indicating whether to execute the POC alignment operation on the entire bitstream and/or a part of the bitstream. The flexibility in bitstream control can be improved.



VIDEO PROCESSING APPARATUS CAPABLE OF GENERATING OUTPUT VIDEO PICTURES/SEQUENCE WITH COLOR DEPTH DIFFERENT FROM COLOR DEPTH OF ENCODED VIDEO BITSTREAM

Thu, 03 Nov 2016 08:00:00 EDT

A video processing apparatus includes a control unit, a storage device, a video decoder and a video processor. The control unit is arranged for generating a color depth control signal. The video decoder is coupled to the storage device and the control unit, and arranged for referring to the color depth control signal to enable a target video decoding mode selected from a plurality of supported video decoding modes respectively corresponding to different output color depths, and decoding an encoded video bitstream under the target video decoding mode to generate decoded video pictures (sequence) to the storage device. The video processor is coupled to at least the storage device, and arranged for processing picture data derived from the data buffered in the storage device to generate output video pictures (sequence) to a display apparatus.



PICTURE DECODING DEVICE, PICTURE DECODING METHOD, PICTURE DECODING PROGRAM, RECEIVING DEVICE, RECEIVING METHOD, AND RECEIVING PROGRAM

Thu, 03 Nov 2016 08:00:00 EDT

In a case where a partition mode in which luma signals are partitioned horizontally and vertically is set when an intra prediction of a picture signal is made in units of minimal coding blocks set in advance, an intra prediction unit is configured to make an intra prediction of a chroma signal in units of prediction blocks of the intra prediction of chroma signals within the minimal coding block set in accordance with a chroma format. A second bitstream constructing unit constructs a bitstream of information relating to a luma intra prediction mode of a prediction block of luma signals and information relating to a chroma intra prediction mode of a prediction block of chroma signals.



IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS

Thu, 03 Nov 2016 08:00:00 EDT

An image decoding method for decoding a bitstream including a coded signal resulting from coding slices into which an image is partitioned and each of which includes coding units, includes decoding the coded signal, wherein each of the slices is either a normal slice having, in a slice header, information used for another slice or a dependent slice which is decoded using information included in a slice header of another slice, the image includes rows each of which includes coding units, and when the normal slice starts at a position other than the beginning of the first row, the second row immediately following the first row does not start with the dependent slice.



VIDEO CODING METHOD FOR INTRA-FRAME PREDICTIVE CODING AND VIDEO CODING APPARATUS

Thu, 03 Nov 2016 08:00:00 EDT

Embodiments of the present invention provide a video coding method for INTRA and a video coding apparatus. The method includes performing a traversal prediction on a current-layer coding unit CU, a prediction mode of a sub-Cu that is divided, from the current-layer CU, and a syntax element that is needed for coding of the current-layer CU; and if the best CU division mode is to divide the current-layer CU into four sub-CUs whose depth is N+1, and prediction modes of the four sub-CUs whose depth is N+1 are the same, performing coding, by using the current-layer CU as a coding unit, on the current-layer CU according to the best CU division mode, the prediction mode of the sub-CU that is divided from the current-layer CU according to the best CU division mode, and the syntax element that is needed for coding of the current-layer CU.



Method and Apparatus for Syntax Redundancy Removal in Palette Coding

Thu, 03 Nov 2016 08:00:00 EDT

A method and apparatus for palette coding of a block of video data using a candidate prediction mode list with syntax redundancy removed are disclosed. In one embodiment, whether a redundant prediction mode exists in the candidate prediction mode list for the current samples of the current block is determined based on the candidate prediction mode list and the previous prediction mode associated with the previous samples. If the redundant prediction mode exists in the candidate prediction mode list, the redundant prediction mode is removed from the candidate prediction mode list to generate a reduced candidate prediction mode list. In another embodiment, whether a redundant predictor exists in a candidate predictor list for a current sample of the current block is determined based on a condition related to one or more predictors for the current sample of the current block.



IMAGE PROCESSING DEVICE AND MOVING IMAGE TRANSMISSION METHOD

Thu, 03 Nov 2016 08:00:00 EDT

Provided is an image processing device which performs scaling and applies super-resolution in accordance with the complexity of the image. On the compression side, a complexity calculation unit calculates the transmission image complexity, which indicates the complexity of the input image, multiplexes and outputs it to an encoded stream, and a control unit configures the cutoff frequency of a low pass filter and the scaling coefficient of an image reduction unit in accordance with the transmission image complexity. On the decompression side, a complexity calculation unit calculates the decoded image complexity indicating the complexity of a decoded and expanded image, a complexity comparison unit compares the transmission image complexity and the decoded image complexity and outputs the difference or ratio, and, on the basis of output, a parameter calculation unit optimizes and configures the scaling coefficient of an image enlargement unit and the folding frequency of a super-resolution processing unit.



IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD

Thu, 03 Nov 2016 08:00:00 EDT

An image processing apparatus comprising an acquiring unit configured to acquire an encoding target block having a plurality of groups each including a predetermined number of pixels, a deciding unit configured to decide for each group a quantization parameter used to quantize image data of the group and an encoding scheme so that a code length of the encoding target block does not exceed a predetermined value, wherein the deciding unit selects, as the encoding scheme of a respective group, either of a first encoding scheme that outputs quantized image data and a second encoding scheme that outputs encoded data of a differential between quantized image data and prediction data, and an encoding unit configured to generate encoded data by encoding image data of the encoding target block in accordance with the quantization parameters and the encoding schemes decided for the respective groups.



Method and Apparatus for Scaling Parameter Coding for Inter-Component Residual Prediction

Thu, 03 Nov 2016 08:00:00 EDT

A method for inter-color residual prediction using an improved scaling parameter coding is disclosed. In one embodiment, a scaling parameter is used for inter-color residual prediction between a first color component and a second color component. The scaling parameter is coded using context-based coding having the same number of context models as the longest binary code for the absolute values of the scaling parameter. For example, when the first scaling parameter is selected from a group consisting of 8, 4, 2, 1, 0, −1, −2 −4 and −8, the absolute values of the scaling parameter can be represented by binary codes with the longest binary code having 4 bits. The context-based coding for the absolute scaling parameter also uses 4 context models. In a second embodiment, the scaling parameter is coded using binary codes by assigning a shorter binary code to a larger non-zero scaling parameter.



SYSTEM, METHOD AND COMPUTER-READABLE MEDIUM FOR ENCODING A SIGNAL INTO MACROBLOCKS

Thu, 03 Nov 2016 08:00:00 EDT

A quantizer and dequantizer for use in a video coding system that applies non linear, piece-wise linear scaling functions to video information signals based on a value of a variable quantization parameter. The quantizer and dequantizer apply different non linear, piece-wise linear scaling functions to a DC luminance signal, a DC chrominance signal and an AC chrominance signal. A code for reporting updates of the value of the quantization parameter is interpreted to require larger changes when the quantization parameter initially is large and smaller changes when the quantization parameter initially is small.



VIDEO ENCODING DEVICE, VIDEO ENCODING METHOD, AND VIDEO ENCODING PROGRAM

Thu, 03 Nov 2016 08:00:00 EDT

A video encoding device includes control means 12 for supplying parameters used in the quantization process to the quantizing means 11, wherein the quantizing means 11 includes: a two-dimensional table 13 storing result values of calculation which is a part of the quantization process, each of the result values is calculated by using a value based on a quantization parameter and a quantization weighting coefficient used for visual image quality control; and computing means 14 for inputting a result value corresponding to two parameters supplied from the control means 12, and generating the quantization coefficient by using the input result value.



IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD

Thu, 03 Nov 2016 08:00:00 EDT

An image processing apparatus comprising, an acquiring unit configured to acquire an encoding target block having a plurality of groups each including a predetermined number of pixels, a deciding unit configured to decide for each group a quantization parameter used to quantize image data of the group and an encoding scheme so that a code length of the encoding target block does not exceed a predetermined value, and an encoding unit configured to generate encoded data by encoding image data of the encoding target block in accordance with the quantization parameters and the encoding schemes decided for the respective groups by the deciding unit.



IMAGE CODING METHOD AND IMAGE DECODING METHOD

Thu, 03 Nov 2016 08:00:00 EDT

An image coding method for coding a current block, by assigning two or more reference picture indexes to one or more reference pictures that are different from a current picture which includes the current block, and the image coding method comprises the following when the two or more reference picture indexes are used to code the current block: determining whether or not reference pictures identified by two or more reference picture indexes are identical to each other; and switching, based on a result of the determining, between whether or not a prediction direction for coding the current block in a predetermined coding mode is fixed.



MOVING PICTURE CODING DEVICE, MOVING PICTURE CODING METHOD AND MOVING PICTURE CODING PROGRAM, AND MOVING PICTURE DECODING DEVICE, MOVING PICTURE DECODING METHOD AND MOVING PICTURE DECODING PROGRAM

Thu, 03 Nov 2016 08:00:00 EDT

A merging motion information candidate list construction unit generates a merging motion information candidate list, which is a list of merging motion information candidates, using a spatial merging motion information candidate and a temporal merging motion information candidate. A second merging motion information candidate supplying unit generates a new merging motion information candidate including, if a reference index indicates an available reference picture, the reference index and, if the reference index does not indicate an available reference picture, a predetermined reference index along with a motion vector having a size and a direction that are preset and adds the new merging motion information candidate to the merging motion information candidate list. A merging motion information selection unit selects one merging motion information candidate from the merging motion information candidate list to which the new merging motion information candidate has been added.



MOVING PICTURE CODING DEVICE, MOVING PICTURE CODING METHOD, AND MOVING PICTURE CODING PROGRAM, AND MOVING PICTURE DECODING DEVICE, MOVING PICTURE DECODING METHOD, AND MOVING PICTURE DECODING PROGRAM

Thu, 03 Nov 2016 08:00:00 EDT

A prediction information deriving unit derives the inter-prediction information candidates from inter-prediction information of a prediction block neighboring to a coding target prediction block or a prediction block present at the same position as or near the coding target prediction block in a coded picture at a temporally different position from the coding target prediction block. A candidate supplementing unit supplements inter-prediction information candidates having the same prediction mode, reference index, and motion vector until the number of inter-prediction information candidates reaches the designated number of candidates when the number of inter-prediction information candidates is smaller than the designated number of candidates.



PICTURE CODING DEVICE, PICTURE CODING METHOD, PICTURE CODING PROGRAM, TRANSMITTING DEVICE, TRANSMITTING METHOD, AND TRANSMITTING PROGRAM

Thu, 03 Nov 2016 08:00:00 EDT

In a case where a partition mode in which luma signals are partitioned horizontally and vertically is set when an intra prediction of a picture signal is made in units of minimal coding blocks set in advance, an intra prediction unit is configured to make an intra prediction of a chroma signal in units of prediction blocks of the intra prediction of chroma signals within the minimal coding block set in accordance with a chroma format. A second bitstream constructing unit constructs a bitstream of information relating to a luma intra prediction mode of a prediction block of luma signals and information relating to a chroma intra prediction mode of a prediction block of chroma signals.



IMAGE DECODING DEVICE, IMAGE CODING DEVICE, AND RESIDUAL PREDICTION DEVICE

Thu, 03 Nov 2016 08:00:00 EDT

Residual prediction poses a problem that deriving a residual involves a large amount of processing for generating two motion-compensated images and deriving a difference. Provided is a residual prediction device including a reference image interpolation unit that derives two residual prediction motion-compensated images, and a residual synthesis unit that derives a residual from a difference between the two residual prediction motion-compensated images and derives a predicted image by adding the residual to a motion-compensated image, in which the residual synthesis unit derives a predicted image by adding the residual to the motion-compensated image in a case where a target block size is greater than a predetermined size and derives the motion-compensated image as the predicted image in a case where the target block size is less than or equal to a predetermined size.



ADAPTIVE STREAMING USING CHUNKED TIME-TO-OFFSET MAPPING

Thu, 03 Nov 2016 08:00:00 EDT

Systems and methods are provided herein relating to adaptive video streaming. Time-to-offset mapping associated with a set of video blocks can be broken up into chunks. A client can download a first set of seek index chunks and use the first set of seek index chunks to select a stream. Seek index chunks within remaining sets of seek index chunks can be ranked for relevance based on client capabilities. A subset of remaining sets of seeks index chunks can be downloaded based on the rankings and client capabilities during streaming. Chunked time-to-offset mapping can facilitate faster startup when playing streamed video.



PERCEPTUAL COLOR TRANSFORMATIONS FOR WIDE COLOR GAMUT VIDEO CODING

Thu, 03 Nov 2016 08:00:00 EDT

A video coding pipeline is provided that can accommodate high dynamic range (HDR) and wide color gamut (WCG) content at a fixed bitrate. The video coding pipeline relies on separate chromaticity and luminance-specific transforms in order to process image content. Image content may be converted into a nearly perceptually uniform color space for coding in constant luminance. Moreover, chromaticity transforms are utilized which reduce coding errors in the chroma components (at the fixed bitrate) by enlarging the distribution of code words for compression.



SPECTRALLY-EFFICIENT SPIRAL-BASED WAVEFORMS FOR COMMUNICATION

Thu, 03 Nov 2016 08:00:00 EDT

Methods for communicating are disclosed. A method includes obtaining at least one input communication symbol selected from a set of communication symbols, converting the at least one input communication symbol into at least one transmittable waveform using at least one defined spiral waveform function, and transmitting the at least one transmittable waveform over a communication channel. Example spiral waveform functions include spline-based piecewise functions and Archimedes spiral functions.



Apparatus & Methods For Symbol Timing Error Detection, Tracking And Correction

Thu, 03 Nov 2016 08:00:00 EDT

Systems and methods for adjusting timing in a communication system, such as an OFDM system are described. In one implementation an error signal is generated to adjust the timing of a variable rate interpolator so as to adjust FFT timing. The error signal may be based on detection of significant peaks in an estimate of the impulse response of the channel, with the peak locations being tracked over subsequent symbols and the system timing adjusted in response to changes in the peaks.



System and Method for Preamble Detection in MIMO Narrowband Power Line Communications

Thu, 03 Nov 2016 08:00:00 EDT

A PLC network system and method operative with OFDM for generating MIMO frames with suitable preamble portions configured to provide backward compatibility with legacy PLC devices and facilitate different receiver tasks such as frame detection and symbol timing, channel estimation and automatic gain control (AGC), including robust preamble detection in the presence of impulsive noise and frequency-selective channels of the PLC network. A PLC device may include a delayed correlation detector and a cross-correlation detector operating in concert to facilitate preamble detection in one implementation.



Methods And Apparatus For Synchronization In Multiple-Channel Communication Systems

Thu, 03 Nov 2016 08:00:00 EDT

Methods and apparatus for processing multichannel signals in a multichannel receiver are described. In one implementation, a plurality of demodulator circuits may provide a plurality of outputs to a processing module, with the processing module then simultaneously estimating noise characteristics based on the plurality of outputs and generating a common noise estimate based on the plurality of outputs. This common noise estimate may then be provided back the demodulators and used to adjust the demodulation of signals in the plurality of demodulators to improve phase noise performance.



CIRCUITS AND METHODS FOR FREQUENCY OFFSET ESTIMATION IN FSK COMMUNICATIONS

Thu, 03 Nov 2016 08:00:00 EDT

A frequency shift key (FSK) receiver includes a phase compensator for compensating for frequency differences in a transmitter that transmits a FSK signal to the receiver. The phase compensating is performed before the FSK signal is demodulated by the receiver.



SYSTEMS AND METHODS FOR NETWORK ROUTING IN SMALL-WORLD NETWORK-ON-CHIP DEVICES

Thu, 03 Nov 2016 08:00:00 EDT

In some embodiments, improved routing strategies for small-world network-on-chip (SWNoC) systems are provided. In some embodiments, an ALASH routing strategy or an MROOTS strategy are used in order to improve latency, temperature, and energy use within a network-on-chip system. In some embodiments, millimeter-wave wireless transceivers are used to implement the long-distance links within the small-world network, to create a millimeter-wave small-world network-on-chip (mSWNoC) system. In some embodiments, non-coherent on-off keying (OOK) wireless transceivers are used to implement the wireless links.



SYSTEM AND METHOD OF DATA COMMUNICATION THAT COMPENSATES FOR WIRE CHARACTERISTICS

Thu, 03 Nov 2016 08:00:00 EDT

A system for compensating wire characteristics includes a transmission pre-emphasis module of a transmission transceiver that sends high level pre-emphasis training bits and low level pre-emphasis training bits along a wired connection, a reception pre-emphasis module of a receiver that receives the high level pre-emphasis training bits and low level pre-emphasis training bits along the wired connection, a pre-emphasis analysis module of the receiver that analyzes the high level pre-emphasis training bits and low level pre-emphasis training bits to determine a pre-emphasis level. The system further includes a controller that interfaces with the transmission transceiver and the receiver, the controller communicates the pre-emphasis level to the transmission transceiver.



CHANNEL DESCRIPTION FEEDBACK IN A COMMUNICATION SYSTEM

Thu, 03 Nov 2016 08:00:00 EDT

A first communication device receives a plurality of training signal fields in a preamble of a data unit transmitted by a second communication device, the plurality of training signal fields in orthogonal frequency division multiplexing (OFDM) symbols comprising data and pilot tones. The first communication device determines first channel estimate data corresponding to the data tones in the OFDM symbols, and uses pilot tones in the plurality of training signal fields to track at least one of i) a phase offset and ii) a frequency offset while receiving the plurality of training signal fields to improve the first channel estimate data. The first communication device generates feedback data that i) includes data corresponding to the first channel estimate data, and ii) excludes data corresponding to second channel estimate data for the pilot tones in the plurality of training signal fields, and transmits the feedback data to the second communication device.



METHOD OF ESTABLISHING AN OSCILLATOR CLOCK SIGNAL

Thu, 03 Nov 2016 08:00:00 EDT

A hybrid numeric-analog clock synchronizer, for establishing a clock or carrier locked to a timing reference. The clock may include a framing component. The reference may have a low update rate. The synchronizer achieves high jitter rejection, low phase noise and wide frequency range. It can be integrated on chip. It may comprise a numeric time-locked loop (TLL) with an analog phase-locked loop (PLL). Moreover a high-performance number-controlled oscillator (NCO), for creating an event clock from a master clock according to a period control signal. It processes edge times rather than period values, allowing direct control of the spectrum and peak amplitude of the justification jitter. Moreover a combined clock-and-frame asynchrony detector, for measuring the phase or time offset between composite signals. It responds e.g. to event clocks and frame syncs, enabling frame locking with loop bandwidths greater than the frame rate.



Clock Recovery for Data Signals

Thu, 03 Nov 2016 08:00:00 EDT

Embodiments of the present invention provide improved techniques for recovering clock information from data signals. In one embodiment, a general purpose device such as a real-time oscilloscope acquires a data signal. The device takes a derivative of the data signal, then computes the square or absolute of the derivative before applying a bandpass filter. The bandpass filter is a windowing function a spectrum that is wider than the clock, and has a flat top and smooth transitions on both sides. In one embodiment, at Tukey window may be used. The device finds edge crossing times of the filtered result, and applies a phase-locked loop or lowpass filter to the edge crossing times in order to recover a stable clock signal. When the improved techniques are implemented in software, they may be used with any number of different equalizers that are required by various high-speed serial data link systems.



RECEIVING CIRCUIT, INTEGRATED CIRCUIT, AND RECEIVING METHOD

Thu, 03 Nov 2016 08:00:00 EDT

A receiving circuit includes a deserializer circuit configured to convert serial data to parallel data in accordance with an operating clock, a phase difference detection circuit configured to detect a phase difference between the operating clock and the serial data on the basis of the parallel data, a control circuit configured to determine a phase adjustment amount for shifting a phase of the operating clock by 1 bit of the serial data in accordance with a result of integration of the phase difference when a separation of the parallel data output from the deserializer circuit is not logically correct, and a phase interpolator circuit configured to cause the phase of the operating clock to shift by the 1 bit of the serial data by using the phase adjustment amount in accordance with the result of the integration of the phase difference.



TRANSFER APPARATUS

Thu, 03 Nov 2016 08:00:00 EDT

A transfer apparatus comprising a first switch configured to generate a first timing pulse based on a reference clock, transmit first information related to the first timing pulse, a second switch configured to, generate a second timing pulse based on the reference clock, transmit second information related to the second timing pulse, a line interface configured to receive signal data and store the signal data in a memory, transfer the signal data based on the first timing pulse when the first information is received, and transfer the signal data based on the information when the first information is not received and the second information is received, detect a phase shift between the first timing pulse and the second timing pulse, transmit the phase shift to the second switch, wherein the second switch is configured to correct, based on the phase shift, a timing that the second timing pulse is generated.



Received Signal Processing Device, Communication System, and Received Signal Processing Method

Thu, 03 Nov 2016 08:00:00 EDT

A carrier recovery unit is provided including: separation-and-output section that outputs separated symbol group formed into block; a priori state-estimation section that obtains a priori estimate acquired by estimating values processed this time from among values of intra-block frequency and central phase processed last time; provisional compensation section that provisionally compensates the phase of each separated symbol based on the a priori estimation phase; decision section that performs decision based on the reference signal for the symbol before decision, and obtains symbol after decision; error-estimation section that calculates the frequency and phase errors; a posteriori state-estimation section that obtains a posteriori estimate based on the frequency and phase errors; actual compensation section that actually compensates the phase based on the a posteriori estimation phase; and feedback processing section that feeds back the a posteriori estimate as the values processed last time to the a priori state estimation section.



CA FDD-FDD AND FDD-TDD ARCHITECTURE

Thu, 03 Nov 2016 08:00:00 EDT

Radio frequency (RF) front end circuitry includes RF filtering circuitry with first multiplexer circuitry and second multiplexer circuitry. The first multiplexer circuitry is used to pass primary RF transmit and receive signals within one or more frequency division duplexing (FDD) operating bands and diversity multiple-input-multiple-output (MIMO) receive signals within one or more time division duplexing (TDD) operating bands between transceiver circuitry and one or more antennas. The second multiplexer circuitry is used to pass primary RF transmit and receive signals within the one or more TDD operating bands and diversity MIMO receive signals within the one or more FDD operating bands between the transceiver circuitry and the one or more antennas.



APPARATUS FOR TRANSMITTING BROADCAST SIGNALS, APPARATUS FOR RECEIVING BROADCAST SIGNALS, METHOD FOR TRANSMITTING BROADCAST SIGNALS AND METHOD FOR RECEIVING BROADCAST SIGNALS

Thu, 03 Nov 2016 08:00:00 EDT

A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals comprises an encoder for encoding DP (Data Pipe) data corresponding to each of a plurality of DPs, wherein the each of a plurality of DPs carries at least one service component, a mapper for mapping the encoded DP data onto constellations, a time interleaver for time interleaving the mapped DP data at DP level by skipping cells having zero values of the DP data, a frame builder for building at least one signal frame including the time interleaved DP data, a modulator for modulating data in the built at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme and a transmitter for transmitting the broadcast signals having the modulated data.



IMPROVED CONTROL OF DIRECTIVE ANTENNAS FOR WIRELESS LINKS

Thu, 03 Nov 2016 08:00:00 EDT

The present disclosure relates to a radio receiver, a radio transmitter, and methods for evaluating receive and transmit antenna patterns of directive payload antennas. The method for evaluating receive antenna patterns of a directive payload antenna comprises the step of steering a probing signal receive pattern of a steerable receive pattern antenna according to a pre-determined sequence of probing signal receive patterns, and receiving a probing signal via the steerable receive pattern antenna, as well as determining a probing signal quality value from the received probing signal as a function of the pre-determined sequence of probing signal receive patterns.



SYSTEMS AND METHODS FOR ENHANCING SPECTRAL EFFICIENCY IN A COMMUNICATION NETWORK

Thu, 03 Nov 2016 08:00:00 EDT

A method for calibrating rates at which data is transmitted in a communication system. There is a short transmission utilizing a first set of communication parameters comprising first and second communication parameters. The first set of communication parameters are different from the second set of communication parameters used to create stable communication between the transmitter and receiver. The second set of communication parameters comprise first and second communication parameters. Then determining that there are substantially no errors associated with reception of the short transmission by the receiver. Then transmitting a long transmission utilizing a third set of communication parameters comprising first and second communication parameters. The first communication parameter of the third set is equal to the first communication parameter of the first set. The second communication parameter of the third set is equal to the second communication parameter of the second set.



ADAPTIVE PRECODING IN A MIMO WIRELESS COMMUNICATION SYSTEM

Thu, 03 Nov 2016 08:00:00 EDT

This invention presents methods for estimating MU-MIMO channel information using SU-MIMO channel information to choose a modulation and channel coding appropriate for the quality of the MU-MIMO channels, for adaptively selecting MU-MIMO precoding methods based on estimations of a plural of UEs and for compensating hardware impairments in MU-MIMO pre-coding.



TRANSMISSION METHOD, TRANSMITTER APPARATUS, RECEPTION METHOD AND RECEIVER APPARATUS

Thu, 03 Nov 2016 08:00:00 EDT

Transmission quality is improved in an environment in which direct waves dominate in a transmission method for transmitting a plurality of modulated signals from a plurality of antennas at the same time. All data symbols used in data transmission of a modulated signal are precoded by hopping between precoding matrices so that the precoding matrix used to precode each data symbol and the precoding matrices used to precode data symbols that are adjacent to the data symbol in the frequency domain and the time domain all differ. A modulated signal with such data symbols arranged therein is transmitted.



System and Method for Multiple-Input and Multiple-Output (MIMO) Full-Duplex Precoding Structures

Thu, 03 Nov 2016 08:00:00 EDT

Embodiments are provided to enable effective cancellation or reduction of the self-interference (SI) introduced when applying full-duplex (FD) transmission to Multiple-Input-Multiple-Output (MIMO) systems. A method embodiment includes forming, using a precoding matrix generated in accordance with channel conditions, a plurality of beams for a plurality of transmit signals and a plurality of self-interference cancellation signals corresponding to the plurality of transmit signals. The method further includes transmitting, at a plurality of antennas, the plurality of beams for the transmit signals, and receiving, via the plurality of antennas, a plurality of receive signals. A corresponding self-interference cancellation signal is then added to each of the plurality of receive signals to obtain a plurality of corrected receive signals, and the plurality of corrected receive signals are detected at a plurality of receivers.



CODEBOOK DESIGN AND STRUCTURE FOR ADVANCED WIRELESS COMMUNICATION SYSTEMS

Thu, 03 Nov 2016 08:00:00 EDT

A base station capable of communicating with a user equipment (UE) includes a transceiver configured to transmit downlink signals containing first and second antenna numbers, first and second oversampling factors indicating respective oversampling rates in first and second dimensions for each beam group, first and second quantities of beams indicating respective quantities of beams in the first and second dimensions for each beam group, and first and second beam skip numbers indicating respective differences of leading beam indices of two adjacent beam groups in the first and second dimensions, receive uplink signals containing a plurality of precoding matrix indicators (PMIs) from the UE. Other embodiments including methods and UEs and methods are disclosed.



ARRANGEMENT COMPRISING A NETWORK NODE AND LEAKY CABLE

Thu, 03 Nov 2016 08:00:00 EDT

The disclosure relates to an arrangement 100; 200 comprising a network node 3 and one or more leaky cables 2 connected at a first end 6 thereof to a respective antenna port of a first set of antenna ports of the network node 3. The network node 3 is configured to provide wireless communication for a communication device 4. The arrangement 10 comprises: a first multiplexing device 8; 10 connected to antenna ports of a second set of antenna ports of the network node 3; a second multiplexing device 9; 11 connected to the one or more leaky cables 2 at a second end 7 thereof; an interconnecting cable 5, interconnecting the first multiplexing device 8; 10 and the second multiplexing device 9; 11, wherein he first multiplexing device 8; 10 is arranged to frequency convert signals received from the second set of antenna ports and multiplex them into the interconnecting cable 5, and arranged to demultiplex signals received from the interconnecting cable 5 and to frequency convert signals for processing by the network node 3, and wherein the second multiplexing device 9; 1 is arranged to frequency convert signals received on the one or more leaky cables 21 and multiplex them into the interconnecting cable 5, and arranged to demultiplex signals received from the interconnecting cable 5 and to frequency convert signals for transmission on the one or more leaky cables 2.



A SYSTEM FOR TRANSMISSION OF DATA AND POWER

Thu, 03 Nov 2016 08:00:00 EDT

A system for transmission of data and electrical power comprising: a plurality of independent power sources, each one of the plurality of independent power sources being connected to a respective one of a plurality of electrical power lines; and a modulator configured to modulate a carrier signal with a data signal received at an input of the modulator so as to generate a modulated carrier signal at an output thereof, wherein the output of the modulator is coupled to each of the plurality of electrical power lines, to permit transmission of the modulated carrier signal over the plurality of electrical power lines, such that the plurality of electrical power lines form a data network whilst maintaining electrical isolation between each of the plurality of electrical power lines.



BACKHAUL LINK FOR DISTRIBUTED ANTENNA SYSTEM

Thu, 03 Nov 2016 08:00:00 EDT

A distributed antenna and backhaul system provide network connectivity for a small cell deployment. Rather than building new structures, and installing additional fiber and cable, embodiments described herein disclose using high-bandwidth, millimeter-wave communications and existing power line infrastructure. Above ground backhaul connections via power lines and line-of-sight millimeter-wave band signals as well as underground backhaul connections via buried electrical conduits can provide connectivity to the distributed base stations. An overhead millimeter-wave system can also be used to provide backhaul connectivity. Modules can be placed onto existing infrastructure, such as streetlights and utility poles, and the modules can contain base stations and antennas to transmit the millimeter-waves to and from other modules.



METHOD AND APPARATUS FOR REDUCING NOISE IN A COMMUNICATION SYSTEM

Thu, 03 Nov 2016 08:00:00 EDT

A system that incorporates teachings of the present disclosure may include, for example, a controller to: determine crosstalk coupling characteristics between a plurality of lines of a digital subscriber line system connected to a plurality of modems based on a transition between a full power mode and one or more other modes, and provide the determined crosstalk coupling characteristics to one or more of the plurality of modems for performance of at least one of pre-coding a transmitted signal and processing a received signal along a line of the plurality of lines, where the pre-coding and processing is performed based at least in part on the determined crosstalk coupling characteristics, and where the pre-coding of the transmitted signal and the processing of the received signal reduce effects of fluctuating crosstalk. Other embodiments are disclosed.



COMMUNICATION APPARATUS AND COMMUNICATION METHOD

Thu, 03 Nov 2016 08:00:00 EDT

A wireless communication terminal apparatus wherein CoMP communication can normally be performed without increasing the overhead of an upstream line control channel. In this apparatus, a spreading unit primarily spreads a response signal by use of a ZAC sequence established by a control unit. A spreading unit secondarily spreads the response signal, to which CP has been added, by use of a block-wise spread code sequence established by the control unit. The control unit controls, in accordance with sequence numbers and a hopping pattern established therein, the circular shift amount of the ZAC sequence to be used for the primary spread in the spreading unit and the block-wise spread code sequence to be used for the secondary spread in the spreading unit. The hopping pattern established in the control unit is a hopping pattern common to a plurality of base stations that CoMP-receive the response signal.



FREQUENCY HOPPING PROCESSING METHOD AND APPARATUS

Thu, 03 Nov 2016 08:00:00 EDT

A frequency hopping processing method and apparatus are disclosed, where user equipment receives frequency hopping information, which is sent by a network device, of an extended transmission time interval (TTI); and determines a frequency hopping area of the extended TTI according to the frequency hopping information of the extended TTI. The frequency hopping area of the extended TTI and a frequency hopping area of a normal TTI do not overlap in frequency, and during M-PUSCH frequency hopping of each extended TTI, the user equipment can hop into a corresponding M-PUSCH frequency hopping area according to a preset frequency hopping pattern, and does not hop into a PUSCH frequency hopping area, so that a resource conflict does not exist when M-PUSCH frequency hopping of an extended TTI and PUSCH frequency hopping of a 1 ms TTI are performed at the same time.



METHODS AND APPARATUS FOR MITIGATION OF RADIO-FREQUENCY IMPAIRMENTS IN WIRELESS NETWORK COMMUNICATION

Thu, 03 Nov 2016 08:00:00 EDT

Systems and techniques for in-phase/quadrature estimation are described. Reference signals are configured and used to perform in-phase and quadrature estimation of a transmitter of a transceiver. Compensation is then performed on the transmitter and the fully-compensated transmitter is used to provide reference signals for in-phase and quadrature estimation of the receiver, and receiver compensation is performed.



MULTIBAND FILTER FOR NON-CONTIGUOUS CHANNEL AGGREGATION

Thu, 03 Nov 2016 08:00:00 EDT

Methods and apparatus, including computer program products, are provided for receivers. In one aspect there is provided an apparatus. In some example embodiments, there is provided an apparatus. The apparatus may include a first N-path filter configured with at least a first passband, wherein the first N-path filter is coupled to a radio frequency input port providing at least a first carrier aggregation signal, a second carrier aggregation signal, and an interfering signal; a second N-path filter configured with at least a second passband, wherein the second N-path filter is coupled to the radio frequency input port providing at least the first carrier aggregation signal, the second carrier aggregation signal, and the interfering signal; and a combiner configured to subtract a first output of the first N-path filter from a second output of the second N-path filter. Related apparatus, systems, methods, and articles are also described.



WIRELESS COMMUNICATION DEVICE

Thu, 03 Nov 2016 08:00:00 EDT

A wireless communication device includes an antenna, a DPDC, an amplifier, a coupler, and a bias output unit. The DPDC performs distortion compensation on a transmission signal based on a feedback signal. The amplifier amplifies the transmission signal subjected to the distortion compensation by the DPDC. The coupler splits the transmission signal amplified by the amplifier into a transmission signal output to the antenna and the feedback signal input to the DPDC. The DPDC measures an index based on a reflected wave obtained by reflection of the transmission signal split by the coupler from the antenna. The bias output unit applies a bias voltage for controlling an efficiency of an amplifier to the amplifier in accordance with the index measured by the DPDC.



RECONFIGURABLE FRACTIONAL-N FREQUENCY GENERATION FOR A PHASE-LOCKED LOOP

Thu, 03 Nov 2016 08:00:00 EDT

In an example, a phase-locked loop (PLL) circuit includes an error detector operable to generate an error signal; an oscillator operable to provide an output signal having an output frequency based on the error signal and a frequency band select signal, the output frequency being a frequency multiplier times a reference frequency; a frequency divider operable to divide the output frequency of the output signal to generate a feedback signal based on a divider control signal; a sigma-delta modulator (SDM) operable to generate the divider control signal based on inputs indicative of an integer value and a fractional value of the frequency multiplier, the SDM responsive to an order select signal operable to select an order of the SDM; and a state machine operable to, in an acquisition state, generate the frequency band select signal and set the order of the SDM.