Audio signal coding method and apparatus

MY215071AActive Publication Date: 2026-08-27HUAWEI TECH CO LTD
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Patent Information

Application Number
MYPI2022005840
Authority / Receiving Office
MY · MY
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-04-21
Filing Date
2021-03-25
Publication Date
2026-08-27
Estimated Expiration
2041-03-25

AI Technical Summary

Technical Problem

Existing three-dimensional audio coding and decoding technology is difficult to accurately determine the tonal component information in high-frequency signals, which affects the coding quality.

Method used

By obtaining the power spectrum ratio of the current frequency region of at least part of the signal of the current frame of the audio signal, the encoding parameters are obtained to represent the tonal component information, and the code stream is multiplexed to generate the coded code stream to ensure that the decoder can accurately reconstruct the audio signal.

Benefits of technology

The quality of the encoded audio signal is improved, the signal characteristics are more accurately reflected through the power spectrum ratio, and the accuracy and coding efficiency of the tonal component information are improved.

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Abstract

An audio signal coding method, an apparatus, a coding device, and a computer-readable storage medium are provided. The method includes: obtaining a current frame of an audio signal (101); obtaining a coding parameter based on a power spectrum ratio of a current frequency in a current frequency area of at least a part of signals of the current frame, where the coding parameter indicates tonal component information of the at least a part of signals, the tonal component information includes at least one of location information of a tonal component, quantity information of tonal components, amplitude information of the tonal component, or energy information of the tonal component, and the power spectrum ratio of the current frequency is a ratio of a value of a power spectrum of the current frequency to a mean value of power spectrums of the current frequency area (102); and performing bitstream multiplexing on the coding parameter to obtain a coded bitstream (103). Because the power spectrum ratio is a ratio of a power spectrum to a mean power spectrum, and can better reflect a signal characteristic, the tonal component information can be accurately obtained, so that a decoder side can reconstruct a high frequency band signal more accurately based on the tonal component information, and the audio signal can be accurately obtained. This improves quality of coding. The Most Illustrative Drawing: Figure 4
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