Television – Bandwidth reduction system – Data rate reduction
Patent
1996-12-13
1998-05-05
Tung, Bryan S.
Television
Bandwidth reduction system
Data rate reduction
382232, H04N 724
Patent
active
057482411
ABSTRACT:
A method for residual coding of model failure regions in compressed video sequences in which a database of residuals for previous model failures is maintained at both the encoder and the decoder. The residuals for each determined model failure regions are compared with the residuals for previous model failures for the same region. In the event a current residual is identified in the database, only the index to the residual in the database needs to be sent. An additional residual taken after the model failure region has been partially corrected with a current residual identified in the database may also be transmitted. This mode provides increased quality at reduced bit rates by maximizing the utilization of previously transmitted or stored data. The process continuously updates the database at both the encoder and decoder when the current residual is not found. The process uses residuals of residuals to provide increased quality of reduced bit rates.
REFERENCES:
patent: 5646867 (1997-07-01), Ozcelik et al.
patent: 5654771 (1997-08-01), Tekalp et al.
Burns Ronnie R.
Nagarajan Ram
Denson-Low Wanda K.
Gudmestad Terje
HE Holdings Inc.
Leitereg Elizabeth E.
Tung Bryan S.
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