METHOD AND APPARATUS FOR ENCODING/DECODING AN AUDIO SIGNAL BY USING AUDIO SEMANTIC INFORMATION
First Claim
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1. An audio signal encoding method comprising:
- transforming an audio signal into a signal of a frequency domain;
extracting semantic information from the audio signal;
variably reconfiguring one or more sub-bands comprised in the audio signal by segmenting or grouping the one or more sub-bands using the extracted semantic information; and
generating a quantized first bitstream by calculating a quantization step size and a scale factor with respect to a reconfigured sub-band of the one or more sub-bands.
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Abstract
An audio signal encoding method and apparatus and an audio signal decoding method and apparatus are provided. The audio signal encoding method includes: transforming an audio signal into a signal of a frequency domain; extracting semantic information from the audio signal; variably reconfiguring one or more sub-bands included in the audio signal by segmenting or grouping the one or more sub-bands using the extracted semantic information; and generating a quantized bitstream by calculating a quantization step size and a scale factor with respect to a reconfigured sub-band of the one or more sub-bands.
112 Citations
28 Claims
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1. An audio signal encoding method comprising:
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transforming an audio signal into a signal of a frequency domain; extracting semantic information from the audio signal; variably reconfiguring one or more sub-bands comprised in the audio signal by segmenting or grouping the one or more sub-bands using the extracted semantic information; and generating a quantized first bitstream by calculating a quantization step size and a scale factor with respect to a reconfigured sub-band of the one or more sub-bands. - View Dependent Claims (2, 3, 4, 5, 6, 7, 21, 22, 23, 26)
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8. An audio signal decoding method comprising:
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receiving a first bitstream of an encoded audio signal and a second bitstream indicating semantic information of the audio signal; determining at least one sub-band of the audio signal that is variably configured in the first bitstream of the audio signal, by using the second bitstream indicating the semantic information; and calculating an inverse-quantization step size and a scale factor with respect to the at least one sub-band, and inverse-quantizing the first bitstream based on the calculated inverse-quantization step size and the calculated scale factor. - View Dependent Claims (9, 10, 27)
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11. An audio signal encoding apparatus comprising:
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a transform unit which transforms an audio signal into a signal of a frequency domain; a semantic information generation unit which extracts semantic information from the audio signal; a sub-band reconfiguration unit which variably reconfigures one or more sub-bands comprised in the audio signal by segmenting or grouping the one or more sub-bands bands using the extracted semantic information; and a first encoding unit which generates a quantized first bitstream by calculating a quantization step size and a scale factor with respect to a reconfigured sub-band of the one or more sub-bands. - View Dependent Claims (12, 13, 14, 15, 16, 17, 24)
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18. An audio signal decoding apparatus comprising:
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a receiving unit which receives a first bitstream of an encoded audio signal and a second bitstream indicating semantic information of the audio signal; a sub-band determining unit which determines at least one sub-band of the audio signal that is variably configured in the first bitstream of the audio signal, by using the second bitstream indicating the semantic information; and a decoding unit which calculates an inverse-quantization step size and a scale factor with respect to the at least one sub-band, and inverse quantizes the first bitstream based on the calculated inverse-quantization step size and the calculated scale factor. - View Dependent Claims (19, 20)
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25. An audio signal decoding method comprising:
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determining at least one sub-band of an audio signal that is variably configured in a bitstream of the audio signal, by using semantic information of the audio signal transmitted with the audio signal; and calculating an inverse-quantization step size and a scale factor with respect to the at least one sub-band, and inverse-quantizing the first bitstream based on the calculated inverse-quantization step size and the calculated scale factor. - View Dependent Claims (28)
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Specification