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Frequency band expansion method and device, electronic equipment and computer readable storage medium

A frequency band expansion and high-frequency technology, applied in the field of audio signal processing, can solve the problems of large network depth and volume, high generalization ability requirements, and high complexity, and achieve good forward compatibility, good generalization ability, and good The effect of auditory experience

Pending Publication Date: 2019-12-10
TENCENT TECH (SHENZHEN) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This coefficient-coefficient mapping method has high requirements on the generalization ability of the network; in order to ensure the effect, the depth and volume of the network are large and the complexity is high; , the performance of this method is generally

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  • Frequency band expansion method and device, electronic equipment and computer readable storage medium
  • Frequency band expansion method and device, electronic equipment and computer readable storage medium
  • Frequency band expansion method and device, electronic equipment and computer readable storage medium

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Embodiment Construction

[0066] In order to make the purpose, features and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.

[0067] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explain...

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Abstract

The embodiment of the application provides a frequency band expansion method and device, electronic equipment and a computer readable storage medium. The method comprises the following steps: determining a low-frequency spectrum parameter of a to-be-processed narrowband signal, inputting the low-frequency spectrum parameter into a neural network model, obtaining a relevance parameter based on theoutput of the neural network model, and obtaining a target high-frequency amplitude spectrum based on the relevancy parameter and the low-frequency amplitude spectrum; obtaining a high-frequency spectrum based on the low-frequency phase spectrum of the narrowband signal and the target high-frequency amplitude spectrum; and obtaining a broadband signal after frequency band expansion based on the low-frequency spectrum and the high-frequency spectrum. In the scheme disclosed by the invention, the relevancy of the high-frequency part and the low-frequency part can be reflected through the relevance parameter, and the frequency band expansion on the narrowband signal can be realized based on the relevance parameter and the low-frequency amplitude spectrum, based on the broadband signal obtained through the frequency band expansion, the signal with resonant sound and large volume can be obtained, and the user has better auditory sense experience.

Description

technical field [0001] The present application relates to the technical field of audio signal processing, and in particular, the present application relates to a frequency band extension method, device, electronic equipment, and computer-readable storage medium. Background technique [0002] Band extension, also known as band duplication, is a classic technique in the field of audio coding. Band extension technology is a parametric coding technology, through which the effective bandwidth can be expanded at the receiving end to improve the quality of the audio signal, so that users can intuitively experience brighter timbre, greater volume and better reliability. understanding. [0003] In the prior art, a classic implementation method of frequency band expansion is to use the correlation between high frequency and low frequency in the speech signal to perform frequency band expansion. In the audio coding system, the above correlation is used as side information. At the codi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/02G10L25/30
CPCG10L19/02G10L19/0216G10L19/0212G10L25/30G10L21/038G10L19/0204G10L25/06G10L25/18G10L21/02G10L21/0388
Inventor 肖玮黄孝明陈家君王燕南
Owner TENCENT TECH (SHENZHEN) CO LTD