Method for decoding an audio signal
First Claim
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1. A method of decoding an audio signal, comprising:
- receiving a downmix signal and a spatial information signal;
if a header is included in the spatial information signal, extracting configuration information from the header;
extracting spatial information included in the spatial information signal;
upmixing the downmix signal into a multi-channel audio signal using the configuration information and the spatial information; and
mapping the multi-channel audio signal to an output channel using multi-channel arrangement information extracted from the configuration information,wherein the spatial information comprises at least one of channel level differences, interchannel correlations and channel prediction coefficients.
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Abstract
The invention relates to a method for decoding an audio signal, to allow an audio signal to be compressed and transferred more efficiently. The inventive method comprises steps of receiving an audio signal with spatial information signal, obtaining location information using the number of time slot and parameter of audio signal, establishing a multi-channel audio signal by applying spatial information signal to down-mix signal, and performing a multi-channel array for a multi-channel audio signal in response to the output channel.
97 Citations
14 Claims
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1. A method of decoding an audio signal, comprising:
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receiving a downmix signal and a spatial information signal; if a header is included in the spatial information signal, extracting configuration information from the header; extracting spatial information included in the spatial information signal; upmixing the downmix signal into a multi-channel audio signal using the configuration information and the spatial information; and mapping the multi-channel audio signal to an output channel using multi-channel arrangement information extracted from the configuration information, wherein the spatial information comprises at least one of channel level differences, interchannel correlations and channel prediction coefficients. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus of decoding an audio signal, comprising:
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a receiving unit receiving a downmix signal and a spatial information signal; a spatial information decoding unit extracting configuration information from a header if the header is included in the spatial information signal, and extracting spatial information included in the spatial information signal; a multi-channel generating unit upmixing the downmix signal into a multi-channel audio signal using the configuration information and the spatial information; and a speaker mapping unit mapping the multi-channel audio signal to an output channel using multi-channel arrangement information extracted from the configuration information, wherein the spatial information comprises at least one of channel level differences, interchannel correlations and channel prediction coefficients. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification