Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2004-10-19
2009-12-01
Phillippe, Gims S (Department: 2621)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C382S233000
Reexamination Certificate
active
07627038
ABSTRACT:
Transcoding of a video stream to reduce the size of the video stream with little, if any, loss in video quality after subsampling. After accessing a video stream of video pictures (i.e., video frames or fields), the blocks of the video picture are each subject to matrix pre-multiplication and post-multiplication. Such matrix multiplication does degrade the video quality if subsampling was not to occur. However, the pre-multiplication and post-multiplication matrices are calculated based on the subsampling matrices that will be used to ultimately subsample the video stream such that after subsampling eventually occurs, the matrix multiplications result in minimal loss of video quality.
REFERENCES:
patent: 4942457 (1990-07-01), Keesen
patent: 5193003 (1993-03-01), Kondo
patent: 5253059 (1993-10-01), Ansari
patent: 5949485 (1999-09-01), Oh
patent: 6243421 (2001-06-01), Nakajima
patent: 6310915 (2001-10-01), Wells et al.
patent: 6333952 (2001-12-01), Lim et al.
patent: 6563876 (2003-05-01), Boyce
patent: 6671322 (2003-12-01), Vetro et al.
patent: 7170932 (2007-01-01), Vetro et al.
patent: 7263231 (2007-08-01), Jiang et al.
Yue Yu Jian Zhou and Chang Wen Chen, “A Fast Block Motion Estimation Algorithm Based on Combined Subsamplings on Pixels and Search Candidates” Image and Video Communications and Processing 2000, Proceedings of SPIE, Vo. 3974 (2000), pp. 835-843.
Myung Jun Kim, Byung Cheol Song, Sung Kyu Jang, and Jong Beom Ra, “An Efficient Video Down Conversation Algorithm Using Modified IDCT Basis Functions” 0-7803-5467-2/99@ 1999 IEEE, pp. 914-918.
Robert Mokry and Dimitris Anastassiou, “Minimal Error Drift in Frequency Scalability for Motion-Compensating DCT Coding”, IEEE Transactions on Circuits and Systems for Video Technology, vol. 4, No. 4, Aug. 1994, pp. 392-406.
Office Action dated Aug. 4, 2004 cited in U.S. Appl. No. 09/886,693.
Notice of Allowance dated Dec. 1, 2004 cited in U.S. Appl. No. 09/886,693.
Moni Shankar
Tardif John A.
Microsoft Corporation
Phillippe Gims S
Workman Nydegger
LandOfFree
Methods and systems for compressing a video stream with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and systems for compressing a video stream with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and systems for compressing a video stream with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4146011