Method and device for audio error concealment
An error concealment and audio technology, applied in the field of audio codec and error concealment, can solve the problems of general error compensation effect, affect the sound quality of tone signal, and poor user experience, and achieve the effect of good user experience.
Active Publication Date: 2021-07-27
BEIJING BAIRUI INTERNET TECH CO LTD
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However, the symbols used to generate the spectral coefficients of the current frame are randomly generated. Although the algorithm of this error concealment method is simple, the effect of error compensation is average, which will affect the sound quality of the tone signal and bring a bad user experience to the user.
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[0014] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0015] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or a...
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The invention discloses an audio error concealment method and device, and belongs to the technical field of audio codec and error concealment. The method mainly includes judging whether the current frame is a tone signal according to the pitch detection parameter value when performing LC3 audio encoding; if the current frame is a tone signal, then calculate the current The pseudo-spectrum of the frame; extract the symbols of all or part of the spectral coefficient values in the pseudo-spectrum of the current frame, and transmit the symbols and the next frame of the current frame at the same time; The spectral coefficients and signs of one frame and the next frame are interpolated to generate an error concealment frame for the current frame. For the tone signal, the present invention can improve the sound quality of the error concealment signal, and provide users with a better use experience.
Description
technical field [0001] The invention relates to the technical field of audio codec and error concealment, in particular to an audio error concealment method and device. Background technique [0002] Bluetooth transmission is a typical short-distance wireless communication. The complex communication environment leads to a high bit error rate. Although the error can be corrected by retransmission, too many retransmissions not only increase the burden on the system but also increase the end-to-end delay. , affecting the user experience. [0003] In the prior art, the spectral coefficients of the previous frame of the current frame are often used to replace the magnitude of the spectral coefficients of the current frame, and then the randomly generated symbols and magnitudes of the spectral coefficients are used to generate an error concealment frame of the current frame. However, the symbols used to generate the spectral coefficients of the current frame are randomly generated...
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IPC IPC(8): G10L19/005
CPCG10L19/005
Inventor 李强王尧叶东翔朱勇
Owner BEIJING BAIRUI INTERNET TECH CO LTD