Method and apparatus for decoding an audio signal and identifying information included in the audio signal
First Claim
1. A method of decoding an audio signal, comprising:
- receiving an audio signal including a downmix signal and ancillary data;
obtaining header identification information that indicates whether a frame of the ancillary data has a corresponding header or not;
when the header identification information indicates that the frame of the ancillary data has the corresponding header, extracting time align information from the corresponding header, andidentifying a temporal relationship between the ancillary data and the downmix signal as indicated by the time align information.
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Abstract
A method and apparatus for encoding and decoding an audio signal are provided. The present invention includes receiving an audio signal including an audio descriptor, recognizing that the audio signal includes a downmix signal and a spatial information signal using the audio descriptor, and converting the downmix signal to a multi-channel signal using the spatial information signal, wherein the spatial information signal includes a header each a preset temporal or spatial interval, and the spatial information signal includes a header each a preset temporal or spatial interval thereby the header can be selectively included in the spatial information signal and if the header is plurally included in the spatial information signal, it is able to decode spatial information in case of reproducing the audio signal from a random point.
92 Citations
5 Claims
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1. A method of decoding an audio signal, comprising:
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receiving an audio signal including a downmix signal and ancillary data; obtaining header identification information that indicates whether a frame of the ancillary data has a corresponding header or not; when the header identification information indicates that the frame of the ancillary data has the corresponding header, extracting time align information from the corresponding header, and identifying a temporal relationship between the ancillary data and the downmix signal as indicated by the time align information. - View Dependent Claims (2, 3, 4)
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5. An apparatus of decoding an audio signal, comprising:
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a receiving unit configured to perform operations comprising; receiving an audio signal including a downmix signal and ancillary data; and an ancillary data decoding unit configured to perform operations comprising; obtaining header identification information that indicates whether a frame of the ancillary data has a corresponding header or not; and when the obtained header identification information indicates that the frame of the ancillary data has the corresponding header, identifying time align information from the corresponding header that identifies a temporal relationship between the ancillary data and the downmix signal.
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Specification