Device and method for postprocessing a decoded multi-channel audio signal or a decoded stereo signal
First Claim
1. A device for postprocessing at least one channel signal of a plurality of channel signals of a multi-channel signal, the at least one channel signal being generated from a decoded downmix signal by a low-bit-rate audio coding/decoding system, the device comprising:
- a receiver for receiving the at least one channel signal generated from the decoded downmix signal, a time envelope of the decoded downmix signal and a classification indication indicating a transient type of the at least one channel signal, wherein the classification indication is associated to the at least one channel signal;
a postprocessor for postprocessing the at least one channel signal based on the time envelope of the decoded downmix signal weighted by a respective weighting factor and in dependence on the classification indication; and
a decider for deciding which one or ones of the plurality of channel signals are postprocessed, the decider being configured to decide dependent on the classification indication indicating the transient type of the channel signal and on a further classification indication indicating a transient type of the downmix signal.
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Abstract
According to the invention, a device (101, 101′) for postprocessing at least one channel signal of a plurality of channel signals of a multi-channel signal is described, the at least one channel signal being generated from a decoded downmix signal by a low-bit-rate audio coding/decoding system, the device comprising: a receiver (103; 103′) for receiving the at least one channel signal generated from the decoded downmix signal, a time envelope of the decoded downmix signal and a classification indication indicating a transient type of the at least one channel signal, wherein the classification indication is associated to the at least one channel signal, and a postprocessor (105; 105′) for postprocessing the at least one channel signal based on the time envelope of the decoded downmix signal weighted by a respective weighting factor and in dependence on the classification indication.
9 Citations
12 Claims
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1. A device for postprocessing at least one channel signal of a plurality of channel signals of a multi-channel signal, the at least one channel signal being generated from a decoded downmix signal by a low-bit-rate audio coding/decoding system, the device comprising:
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a receiver for receiving the at least one channel signal generated from the decoded downmix signal, a time envelope of the decoded downmix signal and a classification indication indicating a transient type of the at least one channel signal, wherein the classification indication is associated to the at least one channel signal; a postprocessor for postprocessing the at least one channel signal based on the time envelope of the decoded downmix signal weighted by a respective weighting factor and in dependence on the classification indication; and a decider for deciding which one or ones of the plurality of channel signals are postprocessed, the decider being configured to decide dependent on the classification indication indicating the transient type of the channel signal and on a further classification indication indicating a transient type of the downmix signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for postprocessing at least one of a left and a right channel signals of a stereo signal, the left and right channel signals being generated from a decoded downmix signal by a low-bit-rate audio coding/decoding system, the device comprising:
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a receiver for receiving the left channel signal and the right channel signal generated from the decoded downmix signal, a time envelope of the decoded downmix signal and a classification indication indicating a transient type of the stereo signal, a postprocessor for postprocessing at least one of the left and right channel signals based on the time envelope of the decoded downmix signal weighted by a respective weighting factor and in dependence on the classification indication; and a decider for deciding which one or ones of the left and right channel signals are postprocessed, said decider being configured to decide in dependence on the classification indication indicating a transient type of the stereo signal. - View Dependent Claims (12)
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Specification