APPARATUS FOR PROCESSING AN AUDIO SIGNAL AND METHOD THEREOF
First Claim
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1. A method for processing an audio signal, comprising:
- extracting, by an audio processing apparatus, scheme type information indicating either time excitation scheme or frequency excitation scheme for each of a plurality of subframes included in current frame;
when the time excitation scheme is applied to at least one subframe among the plurality of subframes according to the scheme type information, extracting mode information representing bit allocation of codebook index for the current frame; and
,when the mode information is extracted, decoding the at least one subframe using the mode information according to the time excitation scheme.
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Abstract
An apparatus for processing an audio signal and method thereof are disclosed, by which extracting, by an audio processing apparatus, scheme type information indicating either time excitation scheme or frequency excitation scheme for each of a plurality of subframes included in current frame; when the time excitation scheme is applied to at least one subframe among the plurality of subframes according to the scheme type information, extracting mode information representing bit allocation of codebook index for the current frame; and, when the mode information is extracted, decoding the at least one subframe using the mode information according to the time excitation scheme.
20 Citations
11 Claims
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1. A method for processing an audio signal, comprising:
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extracting, by an audio processing apparatus, scheme type information indicating either time excitation scheme or frequency excitation scheme for each of a plurality of subframes included in current frame; when the time excitation scheme is applied to at least one subframe among the plurality of subframes according to the scheme type information, extracting mode information representing bit allocation of codebook index for the current frame; and
,when the mode information is extracted, decoding the at least one subframe using the mode information according to the time excitation scheme. - View Dependent Claims (2, 3, 4)
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5. An apparatus for processing an audio signal, comprising:
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a scheme type information obtaining part extracting scheme type information indicating either time excitation scheme or frequency excitation scheme for each of a plurality of subframes included in current frame; a mode information obtaining part, when the time excitation scheme is applied to at least one subframe among the plurality of subframes according to the scheme type information, extracting mode information representing bit allocation of codebook index for the current frame; and
,a time excitation scheme unit, when the mode information is extracted, decoding the at least one subframe using the mode information according to the time excitation scheme. - View Dependent Claims (6, 7, 8)
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9. A method for processing an audio signal, comprising:
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obtaining scheme type information indicating either time excitation scheme or frequency excitation scheme for each of a plurality of subframes included in current frame; obtaining mode information representing bit allocation of codebook index for the current frame; and
,when the time excitation scheme is applied to at least one subframe among the plurality of subframes according to the scheme type information, encoding the mode information by inserting the mode information into a bitstream.
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10. An apparatus for processing an audio signal, comprising:
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a signal classifier obtaining scheme type information indicating either time excitation scheme or frequency excitation scheme for each of a plurality of subframes included in current frame; a time excitation scheme unit obtaining mode information representing bit allocation of codebook index for the current frame; and
,a mode information encoding unit, when the time excitation scheme is applied to at least one subframe among the plurality of subframes according to the scheme type information, encoding the mode information by inserting the mode information into a bitstream.
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11. A computer-readable medium having instructions stored thereon, which, when executed by a processor, causes the processor to perform operations, comprising:
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extracting, by an audio processing apparatus, scheme type information indicating either time excitation scheme or frequency excitation scheme for each of a plurality of subframes included in current frame; when the time excitation scheme is applied to at least one subframe among the plurality of subframes according to the scheme type information, extracting mode information representing bit allocation of codebook index for the current frame; when the mode information is extracted, decoding the at least one subframe using the mode information according to the time excitation scheme.
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Specification