Title:
AUDIO SIGNAL FREQUENCY BAND EXTENSION METHOD AND APPARATUS, DEVICE, AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2024/050673
Kind Code:
A1
Abstract:
An audio signal frequency band extension method and apparatus, a device, and a storage medium, relating to the technical field of communications. The method comprises: receiving a bit stream transmitted by an encoding device, and decoding the bit stream to obtain a decoded audio frequency domain signal; and in response to the fact that a highest frequency point, to which a bit is allocated, of the audio frequency domain signal is lower than the starting frequency point of a preset bandwidth extension frequency band, or a frequency band, to which a bit is allocated, of the audio frequency domain signal is smaller than a preset bandwidth extension starting frequency band, on the basis of frequency spectrum signals in a predetermined frequency band range or a predetermined frequency point range of the audio frequency domain signal, predicting a frequency spectrum signal between the highest frequency point to which the bit is allocated and a highest frequency point of the preset bandwidth extension frequency band. According to the method, the situation that "no frequency spectrum signal exists between the highest frequency point to which the bit is allocated and the starting frequency point of the preset bandwidth extension frequency band" can be avoided, the high and low frequency energy balance within a frame is ensured, a mechanical feeling caused by a frequency spectrum hole is avoided, and the quality of a reconstructed audio is improved.
Inventors:
WANG BIN (CN)
WU XIN (CN)
WANG WEIJIE (CN)
WU XIN (CN)
WANG WEIJIE (CN)
Application Number:
PCT/CN2022/117110
Publication Date:
March 14, 2024
Filing Date:
September 05, 2022
Export Citation:
Assignee:
BEIJING XIAOMI MOBILE SOFTWARE CO LTD (CN)
International Classes:
G10L19/08; H04S3/00
Foreign References:
| CN103971694A | 2014-08-06 | |||
| CN101083076A | 2007-12-05 | |||
| CN111210831A | 2020-05-29 | |||
| KR20220118158A | 2022-08-25 |
Attorney, Agent or Firm:
FASHENG INTELLECTUAL PROPERTY COMPANY, LTD. (CN)
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