Method and an apparatus for processing an audio signal
First Claim
1. A method for processing an audio signal, comprising:
- receiving a plurality of frame data including first frame data and second frame data encoded by at least one coding scheme;
obtaining first flag information indicating whether the first frame data and the second frame data are encoded by a frequency domain transform coding scheme, respectively;
decoding the first frame data by the frequency domain transform coding scheme based on the first flag information when the first frame data is encoded by the frequency domain transform coding scheme;
obtaining second flag information indicating whether at least two subframe data are encoded by a time domain transform coding scheme or a time-frequency domain coding scheme when the second frame data is not encoded by the frequency domain transform coding scheme, the at least two subframe data being included in the second frame data;
decoding the subframe data by the time domain transform coding scheme or a time-frequency domain transform coding scheme based on the second flag information; and
compensating for discontinuity existing between the first frame data decoded by the frequency domain transform coding scheme and the subframe data decoded by the time domain transform coding scheme,wherein the time-frequency domain coding scheme is a time domain coding scheme including a frequency domain transform.
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Accused Products
Abstract
The present invention includes receiving a plurality of frame data including first frame data and second frame data encoded by at least one coding schemes, obtaining first flag information indicating whether the first frame data and the second frame data are encoded by frequency domain transform coding scheme, respectively, decoding the first frame data by frequency domain transform coding scheme based on the first flag information when the first frame data is encoded by frequency domain transform coding scheme, obtaining second flag information indicating whether subframe data is encoded by time domain transform coding scheme or time-frequency domain coding scheme when the second frame data is not encoded by frequency domain transform coding scheme, the at least two subframe data being included in the second frame data, decoding the subframe data by time domain transform coding scheme or time-frequency domain transform coding scheme based on the second flag information, and compensating for discontinuity existing between the first frame data decoded by frequency domain transform coding scheme and the subframe data decoded by time domain transform coding scheme, wherein the time-frequency domain coding scheme is time domain coding scheme including frequency domain transform.
8 Citations
18 Claims
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1. A method for processing an audio signal, comprising:
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receiving a plurality of frame data including first frame data and second frame data encoded by at least one coding scheme; obtaining first flag information indicating whether the first frame data and the second frame data are encoded by a frequency domain transform coding scheme, respectively; decoding the first frame data by the frequency domain transform coding scheme based on the first flag information when the first frame data is encoded by the frequency domain transform coding scheme; obtaining second flag information indicating whether at least two subframe data are encoded by a time domain transform coding scheme or a time-frequency domain coding scheme when the second frame data is not encoded by the frequency domain transform coding scheme, the at least two subframe data being included in the second frame data; decoding the subframe data by the time domain transform coding scheme or a time-frequency domain transform coding scheme based on the second flag information; and compensating for discontinuity existing between the first frame data decoded by the frequency domain transform coding scheme and the subframe data decoded by the time domain transform coding scheme, wherein the time-frequency domain coding scheme is a time domain coding scheme including a frequency domain transform. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for processing an audio signal comprising:
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a decoding unit configured to (a) receive a plurality of frame data including first frame data and second frame data encoded by at least one coding scheme, (b) obtain first flag information indicating whether the first frame data and the second frame data are encoded by a frequency domain transform coding scheme, respectively, (c) decode the first frame data by the frequency domain transform coding scheme based on the first flag information when the first frame data is encoded by the frequency domain transform coding scheme, (d) obtain second flag information indicating whether at least two subframe data are encoded by a time domain transform coding scheme or a time-frequency domain coding scheme when the second frame data is not encoded by the frequency domain transform coding scheme, the at least two subframe data being included in the second frame data, and (e) decode the subframe data by the time domain transform coding scheme or a time-frequency domain transform coding scheme based on the second flag information; and a compensating unit configured to compensate for discontinuity existing between the first frame data decoded by the frequency domain transform coding scheme and the subframe data decoded by the time domain transform coding scheme, wherein the time-frequency domain coding scheme is a time domain coding scheme including a frequency domain transform. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A computer-readable storage medium, comprising a non-transitory medium including at least one of ROM, a CD-ROM, magnetic tapes, floppy discs, and optical data storage devices, comprising digital audio data stored therein, the digital audio data comprising:
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a plurality of frame data including first frame data and second frame data encoded by at least one coding scheme; first flag information indicating whether each of the first frame data and the second frame data is encoded by a frequency domain transform coding scheme; and second flag information indicating whether at least two subframe data are encoded by a time domain transform coding scheme or a time-frequency domain coding scheme when the second frame data is not encoded by the frequency domain transform coding scheme, the at least two subframe data being included in the second frame data, wherein the time-frequency domain coding scheme is time a time domain coding scheme including a frequency domain transform, and wherein the first frame data is decoded by the frequency domain transform coding scheme based on the first flag information when the first frame data is encoded by the frequency domain transform coding scheme, and the subframe data is decoded by the time domain transform coding scheme or a time-frequency domain transform coding scheme based on the second flag information, and the digital audio data is compensated for discontinuity existing between the first frame data decoded by the frequency domain transform coding scheme and the subframe data decoded by the time domain transform coding scheme. - View Dependent Claims (16, 17, 18)
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Specification