H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/50 (2006.01) G11B 20/10 (2006.01) G11B 27/30 (2006.01) H04N 5/76 (2006.01) H04N 5/783 (2006.01) H04N 7/30 (2006.01) G11B 20/12 (2006.01) H04N 9/79 (2006.01) H04N 9/804 (2006.01) H04N 9/806 (2006.01)
Patent
CA 2286251
In order to obtain a high-quality image when an encoded stream which is encoded using MPEG is played back at variable speed, a stream conversion apparatus is provided which converts an arrangement of DCT coefficients of a source encoded stream into an arrangement suitable for variable-speed playback. Specifically, a header part is separated from an elementary stream of MPEG, and DCT coefficients arranged from a low order of a spatial frequency to a high order are extracted by zigzag scan at intervals of a plurality of DCT blocks which form a macro block. These DCT coefficients are rearranged from a low order to a high order across a plurality of DCT blocks. The DCT coefficients rearranged in this manner are packed into a stream, and the separated header part is added, forming a converted elementary stream. This converted elementary stream is recorded. During high-speed playback, even if there is an error in the middle of the macro block, since decoding is possible using a low-order DCT coefficient, high-quality image video data can be obtained.
Gowling Lafleur Henderson Llp
Sony Corporation
LandOfFree
Video signal recording and playback, rearranging dct... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Video signal recording and playback, rearranging dct..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video signal recording and playback, rearranging dct... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-2039344