A method for indoor reverberation elimination

Abstract

The invention relates to a method for eliminating indoor reverberations, and belongs to the technical field of signal processing. The method relates to a later period reverberation power spectrum estimation module, a spectrum subtraction module, a voice / voice-free detection module, an energy decrement module and a self-adaptation spectrum line enhancement module. Input of the later period reverberation power spectrum estimation module is the reverberation voice, output of the later period reverberation power spectrum estimation module is connected with the spectrum subtraction module, input of the spectrum subtraction module is the reverberation voice and the output of the later period reverberation power spectrum estimation module, output of the spectrum subtraction module is connected with the voice / voice-free detection module, output of the voice / voice-free detection module controls the output of the spectrum subtraction module, and the output of the voice / voice-free detection module controls the output of the spectrum subtraction module to be selectively connected with the energy decrement module or the self-adaptation spectrum line enhancement module. The energy decrement module or the self-adaptation spectrum line enhancement module outputs the final enhanced voice.

Description

technical field [0001] The invention relates to a method for eliminating reverberation indoors, and belongs to the technical field of signal processing. Background technique [0002] Reverberation is an acoustic phenomenon produced by the reflection of sound waves in a room. If there is an appropriate amount of reverberation in the room, it can make the sound round and pleasant, and it sounds like a sense of space; if there is insufficient reverberation, the sound will be a little "dry" and sound unnatural; if the reverberation is too large, the sound will be vague unclear. In many occasions of sound collection, especially when the sound source is far away from the microphone, the audio signal collected by the microphone often contains a large reverberation sound, which will seriously affect the clarity and intelligibility of speech, and will also affect the follow-up Performance of audio processing systems (such as speech recognition systems, etc.). At this time, in orde...

AI Technical Summary

Problems solved by technology

Although this technology can achieve real-time reverberation cancellation, it needs to divide the microphone voice into several parts and estimate the energy of the reverberation part, which will increase the complexity of the algorithm and increase the amount of calculation

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