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Music/ non-music real-time detection method and device

A real-time detection, non-music technology, applied in the field of communication

Inactive Publication Date: 2008-08-06
刘文君
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a music / non-music real-time detection method and device, which can solve the above-mentioned respective existing problems of existing short-term analysis and long-term analysis

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  • Music/ non-music real-time detection method and device
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  • Music/ non-music real-time detection method and device

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Embodiment Construction

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0024] Fig. 1 shows the flow chart of the real-time detection method of music / non-music according to an embodiment of the present invention, comprises the following steps:

[0025] Step S10, preprocessing the signal;

[0026] Step S20, calculating the short-term characteristics of the preprocessed signal;

[0027] Step S30, after reaching an analysis step, calculate the root mean square of the accumulated short-term energy to determine whether the signal is in a silent state;

[0028] Step S40, if it is determined to be in a non-quiet state, then calculate long-term characteristic parameters according to short-term analysis parameters;

[0029] Step S50, performing statistical classification according to the calculated long-term characteristic parameters, and determining that the sound category in the current analysis interval is m...

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Abstract

The invention provides a musical / unmusical real-time detection method and a device thereof; the method comprises the following steps: a signal is preprocessed; the short-time feature of the preprocessed signal is calculated; after reaching an analysis step length, the root mean square of cumulative short-time energy is calculated to judge whether the signal is in a silent state; if the signal is determined to be in a non-silent state, long-time feature parameters are calculated according to short-time analysis parameters; according to the calculated long-time feature parameters, the signal is counted and sorted; according to a Gaussian mixture model, whether the sort of the sound in a current analysis interval is a music / non-music is determined; the signal is post-processed to remove a mutation state. The musical / nonmusical real-time detection method realizes musical / nonmusical steady and effective real-time detection or segmentation and is combined with voice activity detection to form an integrated voice activity detection proposal.

Description

technical field [0001] The present invention relates to the field of communication, in particular to a music / non-music real-time detection method and device. Background technique [0002] In the field of voice communication, discontinuous transmission (Discontinued Transmission, DTX) is often required due to transmission bandwidth constraints, and the most critical step is voice activity detection (Voice Activity Detection, VAD). With the continuous enrichment of multimedia services, in addition to voice and environmental acoustic noise, music signals such as ring tones are often added in communication. Under DTX transmission conditions, general VAD will process part of the music signal as noise, making music Signals cannot be transmitted normally, and the encoding method of music signals is also different from that of non-music (including noise, speech, and silence, etc.), so these music signals must be detected in time, and then transmitted using an appropriate encoding al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L11/00G10L19/00G10L25/51
Inventor 刘开文付中华
Owner 刘文君
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