Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2003-10-28
2008-08-05
An, Shawn (Department: 2621)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240250, C375S240270, C375S240260, C375S240200, C382S233000, C382S235000, C382S250000
Reexamination Certificate
active
07408991
ABSTRACT:
A method for decoding video data blocks using variable length codes, comprising transforming information about the spatial frequency distribution of a video data block into pixel values. Prior to said transformation, a first reference value (Xref) representing the abruptness of variations in information about spatial frequency distribution within the block is generated, after said transformation, a second reference value (Δ) representing the abruptness of variation in certain information between the block and at least one previously transformed video data block is generated. The first reference value (Xref) is compared to a first threshold value (TH1) and the second reference value (Δ) to a second threshold value (TH2); and as a response to either of the first (Xref) and second reference values (Δ) being greater than the first (TH1) and respectively the second threshold value (TH2), an error in the block is detected.
REFERENCES:
patent: 5535013 (1996-07-01), Murata
patent: 5621467 (1997-04-01), Chien et al.
patent: 5703889 (1997-12-01), Shimoda et al.
patent: 5708732 (1998-01-01), Merhav et al.
patent: 5745169 (1998-04-01), Murphy et al.
patent: 0999709 (2000-10-01), None
M. R. Pickering et al, 1997, IEEE, p. 773-776.
“Still Image Coding For Noisy Channels” D.W. Redmill and N.G. Kingsbury, Signal Processing and Communications Laboratory Cambridge University Engineering Department, 1994, pp. 95-99.
Moore A., “The Theory of CCITT Recommendation H.261, Video Codec for Audiovisual Services at p×64 kbit/s and review of such a codec”, Dec. 16, 1993, pp. 37, Monash, Faculty of Computing and Information Technology, Department of Robotics and Digital Technology, Technical Report 93-11.
An Shawn
Harrington & Smith PC
Nokia Mobile Phones Limited
LandOfFree
Error detection in low bit-rate video transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Error detection in low bit-rate video transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Error detection in low bit-rate video transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4015173