Removing time delays in signal paths
First Claim
Patent Images
1. A method of generating an encoded audio signal, comprising:
- downmixing a plural-channel audio input signal;
extracting spatial information from the plural-channel audio input signal; and
generating the encoded audio signal from the downmixed signal and the spatial information, wherein a downmix coding identifier is included in the encoded audio signal as information for a decoding scheme of the downmixed signal.
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Abstract
The disclosed embodiments include systems, methods, apparatuses, and computer-readable mediums for compensating one or more signals and/or one or more parameters for time delays in one or more signal processing paths.
54 Citations
19 Claims
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1. A method of generating an encoded audio signal, comprising:
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downmixing a plural-channel audio input signal;
extracting spatial information from the plural-channel audio input signal; and
generating the encoded audio signal from the downmixed signal and the spatial information, wherein a downmix coding identifier is included in the encoded audio signal as information for a decoding scheme of the downmixed signal. - View Dependent Claims (2)
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3. A method of processing an audio signal, comprising:
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receiving an audio signal including a downmix coding identifier indicating a decoding scheme of a downmix signal;
processing the downmix signal according to the decoding scheme corresponding to the downmix coding identifier;
converting a domain of the processed downmix signal; and
combining the converted downmix signal and spatial information, wherein the combined spatial information is delayed by an amount of time that includes an elapsed time of the converting. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. A system for processing an audio signal, comprising:
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a decoder configured for receiving an audio signal including a downmix coding identifier indicating a decoding scheme of a downmix signal, and for decoding the downmix signal according to the decoding scheme;
a converter operatively coupled to the decoder and configured for converting the decoded downmix signal from a first domain to a second domain to provide a converted downmix signal; and
a plural-channel processor operatively coupled to the converter and configured for compensating at least one of the converted downmix signal or the spatial information for a time delay resulting from the converting, and combining the converted downmix signal and spatial information. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A computer-readable medium having instructions stored thereon, which, when executed by a processor, causes the processor to perform the operations of:
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receiving an audio signal including a downmix coding identifier indicating a decoding scheme of a downmix signal;
processing the downmix signal according to the decoding scheme corresponding to the downmix coding identifier;
converting a domain of the processed downmix signal;
compensating at least one of the converted downmix signal or the spatial information for a time delay resulting from the converting; and
combining the converted downmix signal and spatial information.
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18. A system for processing an audio signal, comprising:
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means for receiving an audio signal including a downmix coding identifier indicating a decoding scheme of a downmix signal;
means for processing the downmix signal according to the decoding scheme corresponding to the downmix coding identifier;
means for converting a domain of the processed downmix signal;
means for compensating at least one of the converted downmix signal or the spatial information for a time delay resulting from the converting; and
means for combining the converted downmix signal and spatial information.
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19. A method of processing an audio signal, comprising:
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receiving an audio signal including a downmix coding identifier indicating a decoding scheme of a downmix signal;
processing the downmix signal according to the decoding scheme corresponding to the downmix coding identifier;
converting a domain of the processed downmix signal;
compensating at least one of the converted downmix signal or the spatial information for a time delay resulting from the converting; and
combining the converted downmix signal and spatial information.
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Specification