Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2006-11-28
2006-11-28
Vo, Tung (Department: 2621)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
Reexamination Certificate
active
07142601
ABSTRACT:
A method and system transcodes an input video to a lower spatial resolution. The input video is first decoded into pictures. Each picture includes a set of macroblocks. Each picture sub-sampled to a downscaled picture having a lower spatial resolution. A quantization scale is selected for each macroblock in the downscaled picture. A set of motion vectors is generated for each macroblock in the downscaled picture. A multiplier value based on the quantization scale is determined for each macroblock in the downscaled picture. One of a plurality of encoding modes is selected for each macroblock in the downscaled picture according to the quantization scale, the motion vectors, and the multiplier value. Then, each macroblock in each downscaled picture is encoded according to the quantization scale, the selected encoding mode, and the set of motion vectors to produce an output video having a lower spatial resolution that the input video.
REFERENCES:
patent: 6037987 (2000-03-01), Sethuraman
patent: 6192081 (2001-02-01), Chiang et al.
patent: 6345279 (2002-02-01), Li et al.
patent: 6483851 (2002-11-01), Neogi
patent: 6490320 (2002-12-01), Vetro et al.
patent: 6647061 (2003-11-01), Panusopone et al.
patent: 6671322 (2003-12-01), Vetro et al.
patent: 6870886 (2005-03-01), Challapali et al.
patent: 6934334 (2005-08-01), Yamaguchi et al.
patent: 2002/0067768 (2002-06-01), Hurst
patent: 2002/0126752 (2002-09-01), Kim
patent: 2003/0174770 (2003-09-01), Kato et al.
patent: 2003/0227974 (2003-12-01), Nakamura et al.
Xin, et al., “An HDTV-to-SDTV spatial transcoder,” IEEE Transactions on Circuits and Systems for Video Technology, vol. 12, No. 11, Nov. 2002,.
Shen, et al., “Transcoder with arbitrarily resizing capability,” IEEE proc. ISCAS 2001.
Kong Hao-Song
Sun Huifang
Vetro Anthony
Brinkman Dirk
Mitsubishi Electric Research Laboratories Inc.
Mueller Clifton D.
Vinokur Gene V.
Vo Tung
LandOfFree
Transcoding compressed videos to reducing resolution videos does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transcoding compressed videos to reducing resolution videos, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transcoding compressed videos to reducing resolution videos will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3644865