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System and method for performing image data conversion using intraprediction modes

  • US 10,595,042 B2
  • Filed: 04/15/2019
  • Issued: 03/17/2020
  • Est. Priority Date: 07/18/2011
  • Status: Active Grant
First Claim
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1. A method for coding an image block to generate a bitstream including four luma binary data and one chroma binary data, each of the four luma binary data indicating a luma intra prediction mode used to predict luma samples in each of four subblocks constituting the image block, and each of the four luma binary data comprising a luma context-dependent segment and a luma context-independent segment, the one chroma binary data indicating a chroma intra prediction mode used to predict chroma samples in the image block, and the one chroma binary data comprising a chroma context-dependent segment and a chroma context-independent segment, the method comprising:

  • splitting each of the four luma binary data into a luma context-dependent segment and a luma context-independent segment;

    splitting the one chroma binary data into a chroma context-dependent segment and a chroma context-independent segment;

    grouping first coded data including four coded luma context-dependent segments, second coded data including four coded luma context-independent segments and third coded data including a coded chroma context-dependent segment and a coded chroma context-independent segment;

    performing context adaptive binary arithmetic coding on the first coded data using a variable probability to generate coded luma context-dependent segments, and separately performing context adaptive binary arithmetic coding on the chroma context-dependent segment to generate a coded chroma context-dependent segment;

    performing bypass coding on the second coded data using a fixed probability to generate coded luma context-independent segments, and separately performing bypass coding on the chroma context-independent segment to generate a coded chroma context-independent segment,wherein the bitstream includes, in a following order, the coded luma context-dependent segments, the coded luma context-independent segments, the coded chroma context-dependent segment and the coded chroma context-independent segment.

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