Audio signal processing method and encoding device
A signal processing, voice and audio technology, which is applied in the field of communication, can solve the problems of discontinuous voice and audio signals at the decoding end, and the degradation of voice communication service quality, so as to achieve the effect of continuous voice and audio signals and improve service quality
Active Publication Date: 2014-01-15
HUAWEI TECH CO LTD
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[0005] However, after bandwidth switching using the existing technology at the encoding end, discontinuity of voice and audio signals often occurs at the decoding end, resulting in a decrease in the quality of voice communication services
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[0023] 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 creative efforts fall within the protection scope of the present invention.
[0024] The speech and audio signal processing method of the present invention can be applied to an audio encoder. In the field of digital signal processing, audio codecs are widely used in various electronic devices, such as: mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators,...
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The embodiment of the invention provides an audio signal processing method and an encoding device based on bandwidth switching. The method comprises the steps of adjusting the judgment condition on which a second bandwidth audio signal is judged to be a harmonic signal to obtain a first judgment condition to improve the probability that the second bandwidth audio signal is judged to be a harmonic signal if a first bandwidth audio signal is a harmonic signal, wherein the first bandwidth audio signal is a signal before bandwidth switching, and the second bandwidth audio signal is a signal after bandwidth switching; judging whether the second bandwidth audio signal is a harmonic signal according to the first judgment condition. According to the audio signal processing method and the encoding device, signal types of the audio signals before and after switching can be kept consistent as far as possible under the situation of bandwidth switching, and then the audio signals after decoding equipment is decoded can be continuous as far as possible, and service quality of voice communication is improved.
Description
technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular, to a voice and audio signal processing method and encoding device. Background technique [0002] In the field of digital communication, the transmission of voice, image, audio, and video has a very wide range of application requirements, such as mobile phone calls, audio and video conferences, radio and television, and multimedia entertainment. Voice and audio signals are digitally processed and transmitted from one terminal to another through the communication network. The terminals here can be mobile phones, digital telephone terminals or any other types of voice and audio terminals. Digital telephone terminals such as VOIP telephones or ISDN telephones, computers, Cable communication phone. In order to reduce the resources occupied during the storage or transmission of voice and audio signals, the voice and audio signals are compressed at the sending end a...
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IPC IPC(8): H04B14/00
CPCG10L19/18G10L19/012G10L19/22G10L19/02G10L19/24G10L19/265
Inventor 胡晨刘泽新苗磊
Owner HUAWEI TECH CO LTD