Partial bitstream transcoder system for compressed digital...

Details Partial bitstream transcoder system for compressed digital... Partial bitstream transcoder system for compressed digital...

2006-07-18

2006-07-18

Diep, Nhon (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

Reexamination Certificate

active

07079578

ABSTRACT:
A transcoder system for compressed digital video bitstreams comprising the three frame types: I-frames, P-frames and B-frames, is disclosed. The system includes a picture reader decoder to ascertain and select the type, size or estimated quality of each frame, or the DSP processing power of each frame prior to transcoding. The system also includes a T1transcoder for processing B-frames and a picture decision block for separating all I-frames and P-frames from B-frames in the case where the frame type is selected. Another component is a remerge block for recombining the output of B-frames from said T1transcoder with the untranscoded P-frames and I-frames into a reconstituted output bitstream, such that only the B-frames are processed by the much faster T1transcoder, thereby achieving substantial improvement in the transcoding throughput speed.

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