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Audio signal sampling and reconstruction method, devices and system

An audio signal, audio technology, applied in the field of audio signal sampling and reconstruction, can solve problems such as audio signal distortion

Active Publication Date: 2017-10-31
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Embodiments of the present invention provide a method, device, and system for sampling and reconstructing audio signals, which can solve the problem of audio signal distortion during reconstruction due to the use of a unified sparse dictionary for sparse decomposition of audio signals in the prior art. question

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  • Audio signal sampling and reconstruction method, devices and system
  • Audio signal sampling and reconstruction method, devices and system
  • Audio signal sampling and reconstruction method, devices and system

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0049] In order to facilitate the description of an audio signal sampling method and a reconstruction method respectively provided in the embodiments of the present invention, several concepts involved in t...

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Abstract

The embodiment of the invention provides an audio signal sampling and reconstruction method, devices and a system, and relates to the technical field of signal processing. The problem that in the prior art, a unified sparse dictionary is used for sparse decomposition of an audio signal, causing distortion of the audio signal during reconstruction can be solved. The method comprises the steps that an encoding end determines the audio category of an audio signal to be sampled; the encoding end selects a target measurement matrix corresponding to the audio category for the audio signal from N preset measurement matrixes according to the audio category, wherein the target measurement matrix is used to downsample the audio signal; and the encoding end downsamples the audio signal by means of the target measurement matrix to obtain a sampled signal.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a method, device and system for sampling and reconstructing audio signals. Background technique [0002] Compressive sampling (Compressed sampling) is also called compressed sensing (Compressed sensing, CS), or sparse sampling (Sparse sampling), because the use of compressed sampling can complete the signal compression while sampling the signal, therefore, compressed sampling is widely used in image Signal compression and compression of audio signals. [0003] In compressed sampling, the sparse representation of the signal is a prerequisite for signal sampling and reconstruction. Most signals can be effectively sparsely represented (that is, sparsely decomposed) through different basis functions. However, audio signals have strong time-varying characteristics , for example, the types contained in an audio signal may change with time, so it is difficult to spars...

Claims

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Application Information

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IPC IPC(8): G10L19/008G10L19/02G10L25/03G10L25/06
CPCG10L19/008G10L19/02G10L19/0212G10L25/03G10L25/06
Inventor 蒋三新应忍冬文飞江晓波刘佩林肖玮金文宇
Owner HUAWEI TECH CO LTD