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US 7,010,044 B2Granted
Intra 4×4 modes 3, 7 and 8 availability determination intra estimation and compensation
AssigneeLSI Logic Corporation
InventorsDoni S. Dattani, Lowell L. Winger, Simon Booth
Life of this patent
Estimating the term…
Abstract
An apparatus including a first processing circuit and a second precessing circuit. The first processing circuit may be configured to generate a plurality of reconstructed samples in response to one or more macroblocks of an input signal. The second processing circuit may be configured to determine availability of intra 4×4 prediction modes for each luma sub-block of a current macroblock in response to available reconstructed samples adjacent to the current macroblock.
Claims22
An apparatus comprising:
- a first processing circuit configured to generate a plurality of reconstructed samples in response to one or more macroblocks of an input signal;
- and
- a second processing circuit configured to determine availability of intra 4×4 prediction modes for each luma sub-block of a current macroblock in response to available reconstructed samples adjacent to said current macroblock, wherein (i) an intra 4×4 prediction mode 3 and an intra 4×4 prediction mode 7 are indicated as available when a first group of said reconstructed samples only adjacent to a top edge of a current luma sub-block of said current macroblock is available and a second group of said reconstructed samples only adjacent to a left edge of said current luma sub-block is not available and (ii) an intra 4×4 prediction mode 8 is indicated as available when said first group of said reconstructed samples only adjacent to said top edge of said current luma sub-block is not available and said second group of said reconstructed samples only adjacent to said left edge of said current luma sub-block is available.
An apparatus comprising:
- means for generating a plurality of reconstructed samples in response to one or more macroblocks of an input signal;
- and
- means for determining availability of intra 4×4 prediction modes for each luma sub-block of a current macroblock in response to available reconstructed samples adjacent to said current macroblock, wherein (i) an intra 4×4 prediction mode 3 and an intra 4×4 prediction mode 7 are indicated as available when a first group of said reconstructed samples only adjacent to a top edge of a current luma sub-block of said current macroblock is available and a second group of said reconstructed samples only adjacent to a left edge of said current luma sub-block is not available and (ii) an intra 4×4 prediction mode 8 is indicated as available when said first group of said reconstructed samples only adjacent to said top edge of said current luma sub-block is not available and said second group of said reconstructed samples only adjacent to said left edge of said current luma sub-block is available.
A method for intra prediction of a luma sub-block comprising the steps of:
- (A) generating a plurality of reconstructed samples in response to one or more macroblocks of an input signal;
- and
- (B) determining availability of intra 4×4 prediction modes for each luma sub-block of a current macroblock in response to available reconstructed samples adjacent to said current macroblock, wherein (i) an intra 4×4 prediction mode 3 and an intra 4×4 prediction mode 7 are indicated as available when a first group of said reconstructed samples only adjacent to a top edge of a current luma sub-block of said current macroblock is available and a second group of said reconstructed samples only adjacent to a left edge of said current luma sub-block is not available and (ii) an intra 4×4 prediction mode 8 is indicated as available when said first group of said reconstructed samples only adjacent to said top edge of said current luma sub-block is not available and said second group of said reconstructed samples only adjacent to said left edge of said current luma sub-block is available.
Dependencies are inferred from the claim text.