Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2005-05-17
2005-05-17
Kelley, Chris (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240030
Reexamination Certificate
active
06895055
ABSTRACT:
A system and method for generating a frequency weighted (FW) matrix for use in a Fine-Granularity-Scalability (FGS) video coding system. The system comprises: a system for plotting the average discrete cosine transform (DCT) residuals versus the zigzag DCT scan line locations for a sample video frame encoded both at a predetermined base layer bit-rate and at approximately three times the predetermined base layer bit-rate; a system for generating the difference plot of DCT residuals versus the zigzag DCT scan line locations for the video frame encoded at both the predetermined base layer bit-rate and at approximately three times the predetermined base layer bit-rate; and a system for matching and normalizing a staircase curve to the average difference plot, wherein the staircase curve values can be further mapped into the weights for the FW matrix.
REFERENCES:
patent: 20030058936 (2003-03-01), Peng et al.
“The MPEG-4 fine-grained scalable video coding method for multimedia streaming over IP”□□Radha et al.; Multimedia, IEEE Transactions on , vol.: 3 , Issue: 1 , Mar. 2001 pp.: 53-68□□.*
“Scene-dependent Frequency Weighting for Subjective Quality Improvement of MPEG-4 Fine-Granularity-Scalability”, Proceed. 2002 International Conf. on Image Processing (Cat. No. 02CH37396), Proceed. of ICIP 2002 International Conf. on Image Processing, Rochester, NY, US, Sep. 22-25, 2002, XP002242635.
“Adaptive Frequency Weighting for Fine-Granularity-Scalability”, Visual Communications and Image Processing 2002, San Jose, CA, US, Jan. 22-23, 2002, vol. 4671, pt. 1-2, pp. 840-849, XP008017524.
Peng Shaomin
van der Schaar Mihaela
Kelley Chris
Koninklijke Philips Electronics , N.V.
LandOfFree
Bit-rate guided frequency weighting matrix selection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bit-rate guided frequency weighting matrix selection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bit-rate guided frequency weighting matrix selection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3436153