AUDIO SIGNAL CODING METHOD AND APPARATUS
First Claim
3-1. The audio signal coding method according to claim 1, wherein the selecting the bandwidth extension mode to code the high-frequency audio signals according to the characteristics of the audio signals specifically is:
- if the audio signals are voice signals, selecting a time domain bandwidth extension mode to perform time domain coding for the high-frequency audio signals;
if the audio signals are music signals, selecting a frequency domain bandwidth extension mode to perform frequency domain coding for the high-frequency audio signals.
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Abstract
The present invention relates to an audio signal coding method and apparatus. The method includes: categorizing audio signals into high-frequency audio signals and low-frequency audio signals; coding the low-frequency audio signals by using a corresponding low-frequency coding manner according to characteristics of low-frequency audio signals; and selecting a bandwidth extension mode to code the high-frequency audio signals according to the low-frequency coding manner and/or characteristics of the audio signals.
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15 Claims
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3-1. The audio signal coding method according to claim 1, wherein the selecting the bandwidth extension mode to code the high-frequency audio signals according to the characteristics of the audio signals specifically is:
- if the audio signals are voice signals, selecting a time domain bandwidth extension mode to perform time domain coding for the high-frequency audio signals;
if the audio signals are music signals, selecting a frequency domain bandwidth extension mode to perform frequency domain coding for the high-frequency audio signals.
- if the audio signals are voice signals, selecting a time domain bandwidth extension mode to perform time domain coding for the high-frequency audio signals;
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9. An audio signal coding apparatus, comprising:
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a categorizing unit, configured to categorize audio signals into high-frequency audio signals and low-frequency audio signals; a low-frequency signal coding unit, configured to code the low-frequency audio signals by using a time domain coding manner or a frequency domain coding manner; and a high-frequency signal coding unit, configured to select a bandwidth extension mode to code the high-frequency audio signals according to a low-frequency coding manner and/or characteristics of the audio signals. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification