Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2010-05-07
2011-12-27
Rao, Andy (Department: 2486)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240030, C375S240040
Reexamination Certificate
active
08085854
ABSTRACT:
A quantizer and dequantizer for use in a video coding system that applies non linear, piece-wise linear scaling functions to video information signals based on a value of a variable quantization parameter. The quantizer and dequantizer apply different non linear, piece-wise linear scaling functions to a DC luminance signal, a DC chrominance signal and an AC chrominance signal. A code for reporting updates of the value of the quantization parameter is interpreted to require larger changes when the quantization parameter initially is large and smaller changes when the quantization parameter initially is small.
REFERENCES:
patent: 4920414 (1990-04-01), Remus et al.
patent: 5170264 (1992-12-01), Saito et al.
patent: 5294974 (1994-03-01), Naimpally et al.
patent: 5426512 (1995-06-01), Watson
patent: 5434623 (1995-07-01), Coleman
patent: 5473377 (1995-12-01), Kim
patent: 5493513 (1996-02-01), Keith et al.
patent: 5524024 (1996-06-01), Lin
patent: 5543844 (1996-08-01), Mita et al.
patent: 5559557 (1996-09-01), Kato
patent: 5570203 (1996-10-01), Suzuki et al.
patent: 5604540 (1997-02-01), Howe
patent: 5612900 (1997-03-01), Azadegan et al.
patent: 5659362 (1997-08-01), Kovac et al.
patent: 5731837 (1998-03-01), Hurst, Jr.
patent: 5822005 (1998-10-01), Horne
patent: 5822462 (1998-10-01), Miyake
patent: 5835149 (1998-11-01), Astle
patent: 5870144 (1999-02-01), Guerrera
patent: 5929916 (1999-07-01), Legall et al.
patent: 5937098 (1999-08-01), Abe
patent: 5974184 (1999-10-01), Eifrig et al.
patent: 6219043 (2001-04-01), Yogeshwar et al.
patent: 6219457 (2001-04-01), Potu
patent: 2004/0028143 (2004-02-01), Schoenblum
patent: 0 400 756 (1990-12-01), None
patent: 0 540 961 (1992-10-01), None
patent: 0 514 663 (1992-11-01), None
patent: 0 517 256 (1992-12-01), None
patent: 0 566 219 (1993-10-01), None
patent: 0 582 819 (1994-02-01), None
Puri et al. “Description and Results of Coding Efficiency Modified Experiment T16 in MPEG-4 Video”, International Organization for Standardization, ISO/IEC JTC1/SC29/WG11, MPEG97/1703, Feb. 1997, Sevilla.
“Quantizing Characteristics Based on Initial Compatibility Check Parameters,” CCITT SG XV, Doc. 285, Specialist Group on Coding for Visual Telephony, Jan. 1988.
“Modified signaling of changed quantizer stepsize,” International Organization for Standardization: Coded Representation of Picture and Audio Information; ISO-IEC/JTC1/SG2/WG8, MPEG 90-126, Jul. 1990.
“Report of the Sixteenth Meeting in Stuttgart,” Specialists Group on Coding for Visual Telephony, CCITT SGXV, Working Party XV/1, 89-540, Jun. 16, 1989.
“Framework for improving Quantization Options,” International Organization for Standarizaton: Coded Representation of Picture and Audio Information, ISO-IEC/JTC1/SC29/WG11, MPEG 92-357, Angra dos Reis, Jul. 1992.
“Recommendations resuiting from ad-hoc group meeting,” International Organization for Standardization: Coded Representation of Picture and Audio Information, ISO-IEC/JTC1/SC29/WG11, MPEG 92-542, Sep. 1992.
Haskell Barin Geoffry
Puri Atul
Schmidt Robert Lewis
AT&T Intellectual Property II L.P.
Rao Andy
LandOfFree
System, method and computer-readable medium for encoding a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System, method and computer-readable medium for encoding a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System, method and computer-readable medium for encoding a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4257316