Texas Instruments Corporation

Cisco Technology, Inc.

Akira Osamoto

Hyung Joon Kim

Madhukar Budagavi

Minhua Zhou

Ranga Ramanujam Srinivasan

Hideo Tamama

Yasutomo Matsuba

Osamu Koshiba

Vivienne Sze

Arturo A Rodriguez

Kevin A Murray

Hsiang-Yeh Hwang

Soyeb Noormohammed Nagori

Manu Mathew

Satoru Yamauchi

Masanori Otobe

Toshio Takamizawa

Hiroki Yamaguchi

Several systems and methods for intra-prediction estimation of video pictures are disclosed. In an embodiment, the method includes accessing four 'N×N' pixel blocks comprising luma-related pixels. The four ‘N×N’ pixel blocks collectively configure a ‘2N×2N’ pixel block. A first pre-determined number of candidate luma intra-prediction modes is accessed for each of the four ‘N×N’ pixel blocks. A presence of one or more luma intra-prediction modes that are common among the candidate luma intra-prediction modes of at least two of the four ‘N×N’ pixel blocks is identified. The method further includes performing, based on the identification, one of (1) selecting a principal luma intra-prediction mode for the ‘2N×2N’ pixel block and (2) limiting a partitioning size to a ‘N×N’ pixel block size for a portion of the video picture corresponding to the ‘2N×2N’ pixel block.

Method and system for video picture intra-prediction estimation

A method for coding unit partitioning in a video encoder is provided that includes performing intra-prediction on each permitted coding unit (CU) in a CU hierarchy of a largest coding unit (LCU) to determine an intra-prediction coding cost for each permitted CU, storing the intra-prediction coding cost for each intra-predicted CU in memory, and performing inter-prediction, prediction mode selection, and CU partition selection on each permitted CU in the CU hierarchy to determine a CU partitioning for encoding the LCU, wherein the stored intra-prediction coding costs for the CUs are used.

Method and apparatus for coding unit partitioning

A method and a video processor for preventing start code confusion. The method includes aligning bytes of a slice header relating to slice data when the slice header is not byte aligned or inserting differential data at the end of the slice header before the slice data when the slice header is byte aligned, performing emulation prevention byte insertion on the slice header, and combine the slice header and the slice data after performing emulation prevention byte insertion.

Method and apparatus for video encoding and/or decoding to prevent start code confusion

A method for luma-based chroma intra-prediction in a video encoder or a video decoder is provided that includes down sampling a first reconstructed luma block of a largest coding unit (LCU), computing parameters &#x3b1; and &#x3b2; of a linear model using immediate top neighboring reconstructed luma samples and left neighboring reconstructed luma samples of the first reconstructed luma block and reconstructed neighboring chroma samples of a chroma block corresponding to the first reconstructed luma block, wherein the linear model is Pred[x,y]=&#x3b1;&#xb7;Rec'[x,y]+&#x3b2;, wherein x and y are sample coordinates, Predis predicted chroma samples, and Rec&#x2032; is samples of the down sampled first reconstructed luma block, and wherein the immediate top neighboring reconstructed luma samples are the only top neighboring reconstructed luma samples used, and computing samples of a first predicted chroma block from corresponding samples of the down sampled first reconstructed luma block using the linear model and the parameters.

Luma-based chroma intra-prediction for video coding

A method for motion estimation is provided that includes determining a first motion vector for a first child coding unit (CU) of a parent CU and a second motion vector for a second child CU of the parent CU, wherein the first child CU, the second child CU, and the parent CU are in a CU hierarchy, wherein the first and second child CUs are smallest size CUs in the CU hierarchy, and wherein a first motion search type is used to determine the first motion vector and the second motion vector, selecting the first and second motion vectors as candidate predictors for the parent CU, selecting a predictor for a prediction unit (PU) of the first parent CU from the candidate predictors, and refining the predictor using a second motion search type to determine a motion vector for the PU.

Fast motion estimation for hierarchical coding structures

Several systems and methods for intra-prediction estimation of video pictures are disclosed. In an embodiment, the method includes accessing four 'N&#xd7;N' pixel blocks comprising luma-related pixels. The four 'N&#xd7;N' pixel blocks collectively configure a &#x2018;2N&#xd7;2N&#x2019; pixel block. A first pre-determined number of candidate luma intra-prediction modes is accessed for each of the four &#x2018;N&#xd7;N&#x2019; pixel blocks. A presence of one or more luma intra-prediction modes that are common among the candidate luma intra-prediction modes of at least two of the four &#x2018;N&#xd7;N&#x2019; pixel blocks is identified. The method further includes performing, based on the identification, one of (1) selecting a principal luma intra-prediction mode for the &#x2018;2N&#xd7;2N&#x2019; pixel block and (2) limiting a partitioning size to a &#x2018;N&#xd7;N&#x2019; pixel block size for a portion of the video picture corresponding to the &#x2018;2N&#xd7;2N&#x2019; pixel block.

Embodiments of the present disclosure specify methods and systems for processing a video stream. For example, a video stream may be received at a video processing device. The video stream may comprise video usability syntax elements. The video usability syntax elements may comprise at least a first flag indicative of whether HRD parameters are present for one of fixed frame rate processing or low delay mode processing. The video usability syntax elements may also comprise at least a second flag indicative of whether the video stream comprises field-coded video sequences.

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Plano, TX, United States of America

Akira Osamoto