Systems and methods for playing digital video in reverse and...

Details Systems and methods for playing digital video in reverse and... Systems and methods for playing digital video in reverse and...

2005-11-29

2005-11-29

Tran, Thai (Department: 2616)

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

C386S349000, C386S349000, C725S088000, C725S102000

Reexamination Certificate

active

06970640

ABSTRACT:
Replaying a compressed digital video stream in fast-forward and reverse modes at varied playback rates. An index of interceded frames, those frames not dependant on other frames for generation, is stored. The index includes the size of intercoded frames and their storage location. When a specified playback rate is requested, the intercoded frames are retrieved using the index. The interceded frames then have one or more intracoded frames, frames that reference other frames for generation, placed between them to generate a frame sequence. The intracoded frames are “blank,” meaning they contain only information from their associated interceded frame. By inserting “blank” frames specified playback rates and bit rates are generated. The index of interceded frames may also be accessed to generate playback in reverse mode, which conserves memory resources of associated systems by generating the reverse playback stream in an iterative manner.

REFERENCES:
patent: 6473558 (2002-10-01), Wu et al.
patent: 6801710 (2004-10-01), Halfant
patent: 6865747 (2005-03-01), Mercier
patent: 6871006 (2005-03-01), Oguz et al.
patent: 2003/0231863 (2003-12-01), Eerenberg et al.
patent: 2004/0067043 (2004-04-01), Duruoz et al.
patent: 2005/0025456 (2005-02-01), Halfant

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