Determining the number of unidirectional and bidirectional...

Details Determining the number of unidirectional and bidirectional... Determining the number of unidirectional and bidirectional...

2007-11-13

2007-11-13

Philippe, Gims (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C382S236000

Reexamination Certificate

active

10658938

ABSTRACT:
Methods for processing a set of successive video frames in two passes to determine the number of bidirectional (B) and unidirectional (P) motion compensated frames to be encoded in a video coding system. During the first pass, motion vectors and motion costs are computed for each frame and a derived cost value is computed based on the motion cost of at least one frame. The derived cost value is used to determine the number (NB) of B-frames to be encoded in the set of successive frames. In the second pass, the set of successive frames are encoded where NBframes are encoded as B-frames and some or all motion vectors computed in the first pass are re-used in the second pass. A scene cut detection method is also provided where an impulse-like increase in a ratio of motion costs is monitored.

REFERENCES:
patent: 5565920 (1996-10-01), Lee
patent: 5592226 (1997-01-01), Dickinson
patent: 5774593 (1998-06-01), Zick et al.
patent: 6307886 (2001-10-01), Westermann
patent: 6480540 (2002-11-01), Guillotel
patent: 6611558 (2003-08-01), Yokoyama
patent: 6618507 (2003-09-01), Divakaran
patent: 6778708 (2004-08-01), Divakaran
patent: 6944224 (2005-09-01), Zhao et al.
patent: 7003038 (2006-02-01), Divakaran et al.
patent: 2002/0037051 (2002-03-01), Takenaka
patent: 2002/0146071 (2002-10-01), Chang
patent: 2002/0150160 (2002-10-01), Liu
patent: 2002/0150162 (2002-10-01), Liu
patent: 2005/0013365 (2005-01-01), Mukerjee et al.
patent: 1729495 (1995-08-01), None
patent: 9904108 (2000-09-01), None
patent: 2182005 (1995-08-01), None
patent: 1248864 (2000-03-01), None
patent: 1255021 (2000-05-01), None
patent: 0741945 (1996-11-01), None
patent: 0987903 (2000-03-01), None
patent: 1005229 (2000-05-01), None
patent: 1022667 (2000-07-01), None
patent: 2783388 (2000-03-01), None
patent: 2263602 (1993-07-01), None
patent: 23263 (2000-04-01), None
patent: 9509024 (1997-09-01), None
patent: 11275585 (1999-10-01), None
patent: 2000102021 (2000-04-01), None
patent: 2000165889 (2000-06-01), None
patent: 2000224590 (2000-08-01), None
patent: 2001128179 (2001-05-01), None
patent: 2002101416 (2002-04-01), None
patent: 2000023133 (2000-04-01), None
patent: 2000035571 (2000-06-01), None
patent: 335413 (2000-03-01), None
patent: 74691 (2000-08-01), None
patent: WO 9520863 (1995-08-01), None
patent: WO 2004/036920 (2004-04-01), None
patent: 9905802 (2000-04-01), None
International Search Report, filed Jan. 7, 2002.
Liu-H-C et al: “Scene Decomposition of MPEG Compressed Video” Proceedings of the Spie, Spie Bellingham, VA, US, vol. 2419, Feb. 7, 1995, pp. 26-37, XP000671108 ISSN: 0277-786X the whole document.
Written Opinion of the International Searching Authority, filed Jan. 10, 2005.
Ramkishor K., et al., “Adaptation of Video Encoders for Improvement in Quality”Proceedings of the 2003 IEEE International Symposium on Circuits and Systems, May 25, 2003, pp. II-693, IEEE, Piscataway, NJ, USA.
Peker K. A., et al., “A Novel Pair-wise Comparison Based Analytical Framework for Automatic Measurement of Intensity of Motion Activity of Video Segments,”2001 IEEE International Conference on Multimedia and Expo, Aug. 22, 2001, pp. 936-939, IEEE, US.
International Business Machines Corporation, “Dynamic-GOP for a MPEG-2 Video Compression,”Research Disclosure, Apr. 1, 1999, pp. (whole document), vol. 42, No. 420, Kenneth Mason Publications, Hampshire, GB.
Liu H-C. H., et al., “Scene Decomposition of MPEG Compressed Video,”Proceedings of the SPIE, Feb. 7, 1995, pp. 26-37, vol. 2419, SPIE, Bellingham, VA, US.
EP Examination Report, Feb. 2, 2007, Apple Computer, Inc.

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