Control of frame types in video compression

Details Control of frame types in video compression Control of frame types in video compression

2005-08-18

2010-12-07

Wong, Allen (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240000, C375S240010, C375S240120, C375S240140

Reexamination Certificate

active

07848424

ABSTRACT:
A method of controlling frame types in a video compression system having I, P and B frames calculates activity figures of the video signal in vertical, vertical temporal and horizontal directions. Video sequences with low complexity in which the vertical activity within a field is less than the vertical-temporal activity within a frame are encoded without using B frames whereas sequences with high complexity, i.e. spatial detail, are encoded using B frames by the use of the invention, disadvantages associated with B frames are reduced by the selected use of B frames.

REFERENCES:
patent: 6028633 (2000-02-01), Saunders et al.
patent: 6040861 (2000-03-01), Boroczky et al.
patent: 2001/0031003 (2001-10-01), Sawhney et al.

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