Title:
VIDEO CODING WITH COMPRESSION OF FILTER COEFFICIENTS DEPENDING ON HORIZONTAL AND VERTICAL SYMMETRY OF THE FILTER TAP MATRIX AND THE POSITION OF A FILTER TAP RELATIVE TO THE CENTRAL TAP
Document Type and Number:
WIPO Patent Application WO/2009/089373
Kind Code:
A3
Abstract:
This disclosure recognizes and exploits the fact that some of the filter coefficients defined at the encoder may possess symmetry relative to other filter coefficients. Accordingly, this disclosure describes techniques in which a first set of the filter coefficients are used to predictively encode a second set of the filter coefficients, thereby exploiting any symmetry between filter coefficients. Rather than communicate all of the filter coefficients to the decoding device, the encoding device may communicate the first set of filter coefficients and difference values associated with the second set of filter coefficients. Using this information, the decoder may be able to reconstruct all of the filter coefficients. In some cases, if exact symmetry is imposed, the need to send the difference values may be eliminated and the decoder may be able to derive the second set of filter coefficients from the first set of filter coefficients.
Inventors:
KARCZEWICZ MARTA (US)
YE YAN (US)
YE YAN (US)
Application Number:
PCT/US2009/030468
Publication Date:
June 30, 2011
Filing Date:
January 08, 2009
Export Citation:
Assignee:
QUALCOMM INC (US)
KARCZEWICZ MARTA (US)
YE YAN (US)
KARCZEWICZ MARTA (US)
YE YAN (US)
International Classes:
H04N7/26; H03H17/02
Domestic Patent References:
| WO2006108654A2 | 2006-10-19 | |||
| WO2003058945A2 | 2003-07-17 | |||
| WO2001043285A2 | 2001-06-14 |
Foreign References:
| EP1845729A1 | 2007-10-17 |
Other References:
KARCZEWICZ M ET AL: "Post-filter applicability to intra coding", 33. VCEG MEETING; 83. MPEG MEETING; 12-1-2008 - 13-1-2008; ANTALYA; (VIDEO CODING EXPERTS GROUP OF ITU-T SG.16),, no. VCEG-AH26, 9 January 2008 (2008-01-09), XP030003564
NASSER KEHTARNAVAZ ED - KEHTARNAVAZ ET AL: "Fixed-Point vs. Floating-Point", 1 January 2005, REAL-TIME DIGITAL SIGNAL PROCESSING BASED ON THE TMS320C6000, AMSTERDAM [U.A.] : ELSEVIER NEWNES, NL, PAGE(S) 117 - 139, ISBN: 0-7506-7830-5, XP008135010
NASSER KEHTARNAVAZ ED - KEHTARNAVAZ ET AL: "Fixed-Point vs. Floating-Point", 1 January 2005, REAL-TIME DIGITAL SIGNAL PROCESSING BASED ON THE TMS320C6000, AMSTERDAM [U.A.] : ELSEVIER NEWNES, NL, PAGE(S) 117 - 139, ISBN: 0-7506-7830-5, XP008135010
Attorney, Agent or Firm:
THIEL, Steven R. (5775 Morehouse DriveSan Diego, Califonia, US)
Download PDF: