Electrical audio signal processing systems and devices – Binaural and stereophonic – Quadrasonic
Reexamination Certificate
2005-03-25
2009-10-13
Chin, Vivian (Department: 2614)
Electrical audio signal processing systems and devices
Binaural and stereophonic
Quadrasonic
C381S019000, C381S021000, C381S022000, C704S500000, C704S501000, C704S203000
Reexamination Certificate
active
07602922
ABSTRACT:
There is described a multi-channel encoder (10; 600) for processing input signals conveyed in N input channels to generate corresponding output signals conveyed in M output channels together with complementary parametric data; M and N are integers wherein N>M. The encoder (10; 600) includes a down-mixer for down-mixing the input signals to generate the corresponding output signals, the encoder also comprising an analyser for processing the input signals to generate the parameter data, said parametric data describing mutual differences between the N channels of input signal to allow for regenerating during decoding one or more of the N channels of input signals from the M channels of output signal. Such an encoder (10; 600) is capable of providing highly efficient data encoding and also of being backwards compatibility with relatively simpler decoders having fewer than N decoding output channels. The invention also concerns decoders (800) compatible with such a multi-channel encoder (10; 600).
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Breebaart Dirk J.
Hotho Gerard H.
Schuijers Erik G. P.
Van Loon Machiel W.
Chin Vivian
Koninklijke Philips Electronics , N.V.
Paul Disler
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