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; and
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.
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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.
10 Citations
16 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; and 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method 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 method comprising the following steps:
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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 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.
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13. 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, and 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. - View Dependent Claims (14, 15)
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16. A method for postprocessing at least one of the left and 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 method comprising:
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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; and 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.
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Specification