Method and apparatus for adaptively enabling and disabling PB fr

Details Method and apparatus for adaptively enabling and disabling PB fr Method and apparatus for adaptively enabling and disabling PB fr

1997-06-17

1999-02-09

Lee, Richard

Television

Bandwidth reduction system

Data rate reduction

348409, H04N 712

Patent

active

058701486

ABSTRACT:
A method and apparatus for adaptively enabling a PB frames mode for video data processing. If the PB frames mode is enabled for a given pair of video pictures, and if the motion compensated prediction error for the B-picture in the most recently encoded PB frame is greater than the motion compensated prediction error for the P-picture in same PB frame multiplied by a constant, the PB frames mode is disabled for the PB frame. Otherwise, the PB frames mode remains enabled. If the PB frame is disabled by the PB decision logic, it may remain disabled until certain encoding parameters are met.

REFERENCES:
patent: 5565922 (1996-10-01), Krause
patent: 5614954 (1997-03-01), Jung
patent: 5764921 (1998-06-01), Banham et al.
(Kwon et al., Very low bit rate video codec using variable blocksize Entropy-constrained Residual Vector Quantization IEEE, vol. 6, Issue 3) Jun. 1996.
(Whybray et al., H.263 Video Coding Recommendation for PSTN Video and Multimedia) May 1995.
(International Telecommunication Union, H.263 Telecommunications Standardization Sector of ITU) Mar. 1996.

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