Method of MPEG-2 video variable length decoding in software
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsJia Quan Yang, Sheng Mei Shen, Takafumi Ueno
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Abstract
A method achieves high performance MPEG-2 video variable length decoding as to improve MPEG-2 video decoding process on the whole. The method includes parsing bits, Huffman code decoding for macroblock address increment, decoding motion code, and decoding macroblocks including intra and non-intra macroblocks. This is suitable to any application that are compliant with MPEG-2 MP@ML or MP@ HL video standard. For example, in PC-DTV receiver application, with properly configured PC, one can receive DTV program in real time.
Claims3
A method of MPEG-2 video variable length decoding in software, comprising steps of:
- parsing bits using embedded assembly instructions and MMX technology;
- decoding macroblock address increment by first checking the increment value one;
- decoding motion code using a new designed variable length code tables including sign bit;
- and
- decoding DCT coefficients of macroblock using said new designed variable length code tables including sign bit.
Dependencies are inferred from the claim text.