Texas Instruments Corporation

Ranga Ramanujam Srinivasan

Akira Osamoto

Hyung Joon Kim

Minhua Zhou

Mihir Narendra Mody

Ajit Deepak Gupte

Chaitanya Satish Ghone

Naveen Srinivasamurthy

Mahant Siddaramanna

Manu Mathew

Several methods and systems for chroma residual data prediction for encoding blocks corresponding to video data are disclosed. In an embodiment, at least one coefficient correlating reconstructed luma residual samples and corresponding reconstructed chroma residual samples is computed for one or more encoded blocks of video data. Predicted chroma residual samples are generated for encoding a block of video data based on corresponding reconstructed luma residual samples and the at least one coefficient.

Methods and systems for chroma residual data prediction

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 is provided that includes receiving pictures of a video sequence in a video encoder, and encoding the pictures to generate a compressed video bit stream that is transmitted to a video decoder in real-time, wherein encoding the pictures includes selecting a picture to be encoded as a delayed duplicate intra-predicted picture (DDI), wherein the picture would otherwise be encoded as an inter-predicted picture (P-picture), encoding the picture as an intra-predicted picture (I-picture) to generate the DDI, wherein the I-picture is reconstructed and stored for use as a reference picture for a decoder refresh picture, transmitting the DDI to the video decoder in non-real time, selecting a subsequent picture to be encoded as the decoder refresh picture, and encoding the subsequent picture in the compressed bit stream as the decoder refresh picture, wherein the subsequent P-picture is encoded as a P-picture predicted using the reference picture.

Delayed duplicate I-picture for video coding

A method for intra-prediction estimation is provided that includes determining a best intra-prediction mode for a block of samples, wherein at least some of the neighboring samples used for intra-prediction estimation include approximate reconstructed samples, applying approximate reconstruction to the block of samples using the best intra-prediction mode to generate a block of approximate reconstructed samples, and storing the block of approximate reconstructed samples for use in intra-prediction estimation of other blocks of samples.

Intra-prediction estimation using approximate reconstructed samples

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.

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Bengaluru, India

Ranga Ramanujam Srinivasan