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Transform and quantization architecture for video coding and decoding

  • US 10,326,991 B2
  • Filed: 06/24/2016
  • Issued: 06/18/2019
  • Est. Priority Date: 09/30/2010
  • Status: Active Grant
First Claim
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1. A method of encoding a video stream in a video encoder, the method comprising:

  • computing an offset into a transform matrix based on a transform block size, wherein a size of the transform matrix is larger than the transform block size, and wherein the transform matrix is one selected from a group consisting of a DCT transform matrix and an IDCT transform matrix; and

    transforming a residual block to generate a DCT coefficient block, wherein the offset is used to select elements of rows and columns of a DCT submatrix of the transform block size from the transform matrix.

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