Method and apparatus for coding moving pictures

Details Method and apparatus for coding moving pictures Method and apparatus for coding moving pictures

2005-12-13

2005-12-13

Rao, Andy (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240160

Reexamination Certificate

active

06975681

ABSTRACT:
A moving picture coding method and apparatus is provided that performs motion compensation interframe predictive coding, thus improving the compression efficiency. The magnitude of a forward motion vector, acquired through a forward motion vector search to a P-frame, is reduced in accordance with a frame distance between each B-frame and a reference frame (an I- or P-frame). The reduced forward motion vector is distributed as a forward motion vector to each of B-frames which undergoes bidirectionally motion compensation interframe predictive coding. Of B-frames, a B-frame following an I- or P-frame is subjected to a backward motion vector search while the I- or P-frame is used as a reference frame. The magnitude of the resultant backward motion vector is reduced in accordance with a frame distance between each B-frame and the reference frame (I- or P-frame). The reduced vector is distributed as a backward motion vector. Bidirectionally motion compensation interframe predictive coding is performed using the forward motion vector and the backward motion vector.

REFERENCES:
patent: 5689305 (1997-11-01), Ng et al.
patent: 5801778 (1998-09-01), Ju
patent: 5825421 (1998-10-01), Tan
patent: 6351545 (2002-02-01), Edelson et al.
patent: 8-289301 (1996-11-01), None
patent: 11-239350 (1999-08-01), None
patent: 2000-134629 (2000-05-01), None
patent: 2000-224593 (2000-08-01), None

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