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Title:
FREQUENCY BAND EXTENSION METHOD, APPARATUS, ELECTRONIC DEVICE AND COMPUTER-READABLE STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2021/052287
Kind Code:
A1
Abstract:
A frequency band extension method, an apparatus, an electronic device and a computer-readable storage medium, the method being executed by the electronic device, and comprising: performing time-frequency conversion of a narrowband signal to be processed, obtaining a corresponding initial low-frequency spectrum; on the basis of the initial low-frequency spectrum, obtaining a correlation parameter of a high-frequency component and a low-frequency component of a target broadband spectrum by means of neural network modeling, the correlation parameter comprising at least one of a high-frequency spectrum envelope and relative flatness information, relative flatness information expressing a correlation between frequency flatness of the high-frequency component of the broadband spectrum and frequency flatness of the low-frequency component; on the basis of the correlation parameter and the initial low-frequency spectrum, obtaining an initial high-frequency spectrum; according to a target low-frequency spectrum and a target high-frequency spectrum, obtaining a post-frequency band extension broadband signal; the target low-frequency spectrum being the initial low-frequency spectrum or a frequency spectrum of the initial low-frequency spectrum after filter processing, and the target high-frequency spectrum being the initial high-frequency spectrum or a frequency spectrum of the initial high-frequency spectrum after filter processing.

Inventors:
XIAO WEI (CN)
Application Number:
PCT/CN2020/115052
Publication Date:
March 25, 2021
Filing Date:
September 14, 2020
Export Citation:
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Assignee:
TENCENT TECH SHENZHEN CO LTD (CN)
International Classes:
G10L19/02
Foreign References:
CN110556122A2019-12-10
CN101996640A2011-03-30
CN101471072A2009-07-01
CN101288614A2008-10-22
CN102044250A2011-05-04
CN103413557A2013-11-27
US7698143B22010-04-13
CN201910882478A2019-09-18
Other References:
See also references of EP 3920182A4
Attorney, Agent or Firm:
DEQI INTELLECTUAL PROPERTY LAW CORPORATION (CN)
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