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Speech encoding method, speech decoding method and device

A technology of encoding method and decoding method, applied in the field of speech encoding method and device, to achieve the effects of avoiding influence and reducing nonlinear changes

Active Publication Date: 2021-07-20
AISPEECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no low-consumption codec algorithm for front-end signal processing on the market

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  • Speech encoding method, speech decoding method and device
  • Speech encoding method, speech decoding method and device
  • Speech encoding method, speech decoding method and device

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Embodiment Construction

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0044] The invention may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, progr...

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Abstract

The present invention discloses a speech encoding / decoding method and device, wherein the speech signal encoding method includes: predetermining a fixed step value for speech signal encoding; calculating the speech signal at the current moment and the predicted speech signal at the previous moment The difference between them; encode the difference based on the fixed step value to obtain an encoding result. In the embodiment of the present invention, the fixed step value can reduce the nonlinear change of the original speech signal, so that when the front-end signal processing (for example, echo cancellation, beamforming) is subsequently performed, there will be no amplification nonlinear change that will affect the The result is processed, thereby avoiding the impact on the back-end speech recognition.

Description

technical field [0001] The invention relates to the technical field of speech signal processing, in particular to a speech encoding method and device, and a speech encoding method and device. Background technique [0002] Existing audio codec technologies can be divided into two categories. One is lossless compression, such as FLAC, APE, etc.; the other is lossy compression, such as opus, ogg, mp3 and other compression technologies. [0003] Lossless compression is the most ideal state, without any impact on signal processing, but the high computational complexity of such algorithms is not suitable for the current low power consumption requirements, which reduces the selectivity of the CPU, and the compression ratio is small, usually not to 2:1; the lossy compression commonly used in the market cannot meet the requirements of signal processing, and usually the amount of calculation is relatively large. [0004] For lossless compression, its inherent algorithm complexity ma...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/04
CPCG10L19/04
Inventor 牛坤姜友海
Owner AISPEECH CO LTD