Electrical audio signal processing systems and devices – Binaural and stereophonic – Quadrasonic
Reexamination Certificate
2008-07-01
2008-07-01
Chin, Vivian (Department: 2615)
Electrical audio signal processing systems and devices
Binaural and stereophonic
Quadrasonic
C381S017000, C381S018000, C381S019000, C700S094000, C704S500000, C704S501000
Reexamination Certificate
active
07394903
ABSTRACT:
The apparatus for constructing a multi-channel output signal using an input signal and parametric side information, the input signal including the first input channel and the second input channel derived from an original multi-channel signal, and the parametric side information describing interrelations between channels of the multi-channel original signal uses base channels for synthesizing first and second output channels on one side of an assumed listener position, which are different from each other. The base channels are different from each other because of a coherence measure. Coherence between the base channels (for example the left and the left surround reconstructed channel) is reduced by calculating a base channel for one of those channels by a combination of the input channels, the combination being determined by the coherence measure. Thus, a high subjective quality of the reconstruction can be obtained because of an approximated original front/back coherence.
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Faller Christof
Herre Jürgen
Chin Vivian
Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung
Greenberg Laurence A.
Locher Ralph E.
Paul Disler
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