Patent ID: 7010044
Filing Date: 2006-03-07
Classification: H04N

Abstract:
1. 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.