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"В Firefox 3.1 добавлена поддержка Ogg Theora и HTML5 тэга 'v..." Отправлено Аноним, 01-Авг-08 18:32
Угу, такойже отстой как MPEG2 , кто спорит. Никаких сомнений, Вы совершенно правы. взято из http://forum.doom9.org/showthread.php?s=&threadid=77314 - a block-based motion compensation - a 8x8 Type-II Discrete Cosine Transform - free-form variable bit rates (VBR) - adaptive in-loop deblocking applied to the edges of the coded blocks (not existing in MPEG-4 ASP) - block sizes down to 8x8 (MPEG-4 ASP supports 8x8 only with 4MV) - 384 8x8 custom quantization matrices: intra/inter, luma/chroma and even each quant (more than VP3 and MPEG-4 ASP/AVC) - flexible entropy encoding (Theora supports 80 VLC tables selectable per-frame, MPEG-4 ASP has just one) - 4:2:0, 4:2:2, and 4:4:4 chroma subsampling formats (VP3 and MPEG-4 ASP only support 4:2:0) - multiple reference frames (not possible in MPEG-4 ASP) - pixel aspect ratio (eg for anamorphic signalling/playback) - non-multiple of 16 picture sizes (as possible in ASP, but not in VP3) - non-linear scaling of quants values (as done in MPEG-4 AVC) - adaptive quantisation down to the block level (as possible in MPEG-4 ASP/AVC, but not in VP3) - intra frames (I-Frames in MPEG), inter frames (P-Frames), but no B-Frames (as supported in MPEG-4 ASP/AVC) - HalfPixel Motion Search Precision (MPEG-4 ASP/AVC supports HalfPixel or QuarterPixel) - technologies used already in Vorbis (decoder setup configuration, bitstream headers...) not available in VP3

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Сообщение*:	> Угу, такойже отстой как MPEG2 , кто спорит. Никаких сомнений, Вы совершенно > правы. > взято из http://forum.doom9.org/showthread.php?s=&threadid=77314 > - a block-based motion compensation > - a 8x8 Type-II Discrete Cosine Transform > - free-form variable bit rates (VBR) > - adaptive in-loop deblocking applied to the edges of the coded blocks > (not existing in MPEG-4 ASP) > - block sizes down to 8x8 (MPEG-4 ASP supports 8x8 only with > 4MV) > - 384 8x8 custom quantization matrices: intra/inter, luma/chroma and even each quant > (more than VP3 and MPEG-4 ASP/AVC) > - flexible entropy encoding (Theora supports 80 VLC tables selectable per-frame, MPEG-4 > ASP has just one) > - 4:2:0, 4:2:2, and 4:4:4 chroma subsampling formats (VP3 and MPEG-4 ASP > only support 4:2:0) > - multiple reference frames (not possible in MPEG-4 ASP) > - pixel aspect ratio (eg for anamorphic signalling/playback) > - non-multiple of 16 picture sizes (as possible in ASP, but not > in VP3) > - non-linear scaling of quants values (as done in MPEG-4 AVC) > - adaptive quantisation down to the block level (as possible in MPEG-4 > ASP/AVC, but not in VP3) > - intra frames (I-Frames in MPEG), inter frames (P-Frames), but no B-Frames > (as supported in MPEG-4 ASP/AVC) > - HalfPixel Motion Search Precision (MPEG-4 ASP/AVC supports HalfPixel or QuarterPixel) > - technologies used already in Vorbis (decoder setup configuration, bitstream headers...) > not available in VP3
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