Efficient transcoding device and method

Details Efficient transcoding device and method Efficient transcoding device and method

1994-01-07

1996-07-16

Chin, Stephen

Pulse or digital communications

Pulse code modulation

Differential

375243, 348405, 348418, H04B 1406

Patent

active

055374409

ABSTRACT:
The present invention provides a transcoder for transcoding of digitally encoded bit streams produced by predictive encoders. The transcoder of this invention is less complex than previously known transcoders in terms of both computational and storage requirements. This efficiency is achieved by combining decoding and re-encoding steps into one step. This one-step transcoding is accomplished by modifying the originally quantized vectors and then requantizing and noiseless encoding these vectors into a bit stream in accordance with a predetermined objective.

REFERENCES:
patent: 4411001 (1983-10-01), Van Buul et al.
patent: 4972260 (1990-11-01), Fujikawa
patent: 5072295 (1991-12-01), Murakami et al.
patent: 5202685 (1993-04-01), Nagata
patent: 5204677 (1993-04-01), Akagiri et al.
patent: 5283814 (1994-02-01), Iwahashi et al.
patent: 5333012 (1994-07-01), Singhal et al.
patent: 5349383 (1994-09-01), Parke et al.

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