Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2006-03-14
2006-03-14
An, Shawn S. (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240030, C375S240160, C375S240250, C375S240260, C375S240240, C348S699000, C382S251000, C382S233000, C382S236000, C382S235000
Reexamination Certificate
active
07012960
ABSTRACT:
The present invention relates to a method of transcoding (200) a primary encoded signal (S1) into a secondary encoded signal (S2). Said transcoding method comprising at least a step of decoding a current picture of the primary encoded signal, said decoding step comprising a dequantizing sub-step (12) for producing a first transformed signal (R1), an encoding step, following the decoding step, for obtaining the secondary encoded signal, said encoding step comprising a quantizing sub-step (13), and a step of predicting a transformed motion-compensated signal (Rmc) from a transformed encoding error (Re) derived from the encoding step, said prediction step being situated between the encoding and decoding steps. Said method of transcoding further comprises a filtering step (21), between the dequantizing sub-step and the quantizing sub-step, for obtaining a better picture quality for low bitrate applications.
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Bourge Arnaud
Morel Anthony
An Shawn S.
Koninklijke Philips Electronics , N.V.
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