Audio signal processing method and device
An audio signal processing and audio signal technology, applied in the computer field, can solve problems such as residual echo, achieve the effect of eliminating residual echo and improving audio quality
Active Publication Date: 2020-08-07
SUZHOU CODYY NETWORK SCI & TECH
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However, due to the interactive function in the live recording and broadcasting interactive system, the microphone will inevitably collect the far-end sound (that is, the echo). After processing by the echo cancellation module, there will still be a certain degree of echo residue, so simply use the automatic gain control module. It will easily re-amplify the already weakened echo
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[0011] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. 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.
[0012] figure 1 Shown is a flowchart of an audio signal processing method provided according to a preferred embodiment of the present invention. Such as figure 1 As shown, the audio signal processing method provided by the preferred embodiment of the present invention includes the following steps:
[0013] Step 102, judging whether the input audio signal of the current frame after echo cancellation has echo residue.
[0014] Step 104, if there is an echo residual, an echo residual factor is obtained according to the echo residual data.
[0015] Step 106, obtain the automatic gain value of the audio signal of the current frame according to the automatic gain control strategy and the echo residual ...
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The invention provides an audio signal processing method and device. The audio signal processing method comprises the steps of judging whether an input current frame audio signal on which echo cancelation is performed has echo remnants or not; if the current frame audio signal has echo remnants, acquiring a first automatic gain value of the current frame audio signal according to echo remnant data; and performing automatic gain processing on the current frame audio signal according to the first automatic gain value. The audio signal processing method can solve a problem that the audio effect is affected because echo remnants still exist after echo cancellation is performed, so that the echo remnants are further eliminated, and the audio quality is improved. In addition, the finally output sound amplitude is enabled to be always kept within a constant range through automatic gain control for audio signals.
Description
technical field [0001] The invention belongs to the technical field of computers, in particular to an audio signal processing method and device. Background technique [0002] The distance between the sound source and the pickup determines the strength of the sound. When the sound source is closer to the pickup, the collected sound is stronger; when the sound source is farther away from the pickup, the collected sound is weaker. Due to unavoidable subjective factors in the live recording and broadcasting interactive system, the distance between the teacher and the microphone cannot be constant, resulting in the collected sound fluctuating, which seriously affects the listening effect of the receiver. The automatic gain control module (Automatic gain control) can realize the function of controlling the sound volume by changing the input and output compression ratio of the audio signal, so that the final output sound amplitude is always kept within a constant range. However, d...
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IPC IPC(8): G10L21/0208G10L21/034
CPCG10L21/0208G10L21/034G10L2021/02082
Inventor 顾骋
Owner SUZHOU CODYY NETWORK SCI & TECH