METHOD AND APPARATUS FOR ENCODING AND DECODING AN AUDIO SIGNAL
First Claim
1. A method of decoding an audio signal, comprising:
- receiving an audio signal including a downmix signal and an ancillary signal;
obtaining type information of the ancillary signal;
checking header identification information indicating whether a header is included in the ancillary signal based on the type information of the ancillary signal;
extracting time align information from the header when the header is included in the ancillary signal according to the header identification information;
identifying a start position of a frame of the ancillary signal using the time align information,wherein the type information indicates whether the ancillary signal includes only a frame or both a frame and a header.
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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.
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Citations
14 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 an ancillary signal; obtaining type information of the ancillary signal; checking header identification information indicating whether a header is included in the ancillary signal based on the type information of the ancillary signal; extracting time align information from the header when the header is included in the ancillary signal according to the header identification information; identifying a start position of a frame of the ancillary signal using the time align information, wherein the type information indicates whether the ancillary signal includes only a frame or both a frame and a header. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus of decoding an audio signal, comprising:
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a receiving unit receiving an audio signal including a downmix signal and an ancillary signal; an ancillary signal decoding unit obtaining type information of the ancillary signal, and checking header identification information indicating whether a header is included in the ancillary signal based on the type information of the ancillary signal, and identifying a start position of a frame of the ancillary signal using the time align information obtained from the header when the header is included in the ancillary signal according to the header identification information, wherein the type information indicates whether the ancillary signal includes only a frame or both a frame and a header.
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Specification