Audio signal detection method and device

Abstract

The embodiment of the invention discloses an audio signal detection method and an audio signal detection device. The input audio signal is subjected to foreground / background detection, and the detected background signal frame is detected according to a music characteristic value combined judging method, so that the background music can be detected, and the classification performance of a video / music classifier is improved.

Description

technical field [0001] The invention relates to a signal detection technology in the audio field, in particular to an audio signal detection method and device. Background technique [0002] In a communication system, the input audio signal is usually encoded and then transmitted to the opposite end. In communication systems, especially in wireless / mobile communication systems, channel bandwidth is a relatively scarce resource. In a two-way conversation, one party only speaks for about half of the total conversation time, and the other half is in a silent state. In the case of relatively tight channel bandwidth, if the communication system only transmits signals when people are speaking and stops signal transmission when people are silent, a large amount of bandwidth can be allocated to other users. In order to achieve this goal, the communication system needs to know when the caller starts speaking and when he stops speaking, that is, when the voice is active, which requir...

AI Technical Summary

Problems solved by technology

[0009] Although the above technology can detect the music signal, it cannot distinguish the foreground music from the background music, so it is not possible to use a suitable encoding technology for the background music signal according to the bandwidth.

Moreover, the above technology may treat some conventional background noise such as babble noise as a complex signal, which greatly affects the bandwidth saving

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