Audio signal processing method and device

Abstract

The embodiment of the invention discloses a voice signal processing method. An energy decay and gain value is set on the background noise signals, a background noise frame which is obtained after hiding the frame to the errors is corresponding to the background noise signals, the difference value between the background noise signals energy decay and gain value which the background noise frame is corresponding to and the signal energy decay and gain value which the previous frame is corresponding to is made to be in the threshold scale. The energy decay and gain value is used for controlling the energy decay of the background noise which the background noise frame is corresponding to. The invention also discloses a voice signal processing device. By using the voice signal processing method and the processing device, the energy transition between the error hiding signal area and the background noise signal area is made to be natural and smooth, and the comfortableness of the hearing of the hearers is improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a voice signal processing method and a voice signal processing device. Background technique [0002] In voice communication, voice signals are generally processed by frames, and the length of each frame of voice signals is generally 10 milliseconds (ms) to 30 ms. For each frame of voice signals, the basic processing flow is: [0003] At the sending end, the speech encoder encodes each frame of speech signal, and encapsulates the coded bits into a speech data frame; [0004] The communication channel, which sends the voice data frame sent by the sending end to the receiving end; [0005] The receiving end decodes the received voice data frame with a voice decoder to recover the voice signal. [0006] For the voice decoder, the key to whether it can recover the voice signal is whether it can accurately receive the voice data frame sent by the sending end, which depends on the communicat...

AI Technical Summary

Problems solved by technology

[0008] The FEC technology is defined on the speech decoder to perform FEC processing on the speech data frame (corresponding to the error concealment frame). However, since the speech signal is not purely the audible signal generated by people's vocalization, it may also include background noise between people's vocalizations. signal (relative to the voiced signal, the background noise signal is a silent signal), the appearance of the background noise signal (corresponding to the background noise frame generated by the speech coder) will cause energy mutations in the recovered signal after error concealment processing, and give the listener Hearing causes discomfort, especially when background noise frames are lost, the sense of hearing discomfort caused by this energy mutation is more intense

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