Speech enhancement method applied to ultra-short wave radio station

An ultra-short wave radio station and voice enhancement technology, which is applied in the field of communication, can solve the problems of not being able to effectively improve the signal-to-noise ratio, and achieve the effect of a priori accurate signal-to-noise ratio and improved voice signal-to-noise ratio

Active Publication Date: 2018-12-25
CHENGDUSCEON TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: at present, the main voice enhancement method of the ultrashort wave radio station is to cascade a simple voice enhancement algorithm after signal demodulation to achieve the purpose of improving the voice signal-to-noise ratio, but it is only a simple voice enhancement algorithm cascaded The voice enhancement algorithm can not meet the requirement of effectively improving the signal-to-noise ratio, and the present invention provides a voice enhancement method applied to ultrashort wave radio stations to solve the above problems

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  • Speech enhancement method applied to ultra-short wave radio station
  • Speech enhancement method applied to ultra-short wave radio station
  • Speech enhancement method applied to ultra-short wave radio station

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Embodiment

[0042] The invention provides a voice enhancement method applied to ultrashort wave radio stations, such as figure 2 As shown, the specific operation method is as follows:

[0043] Setp.1, start receiving signals.

[0044] Setp.2, Carrier Indication Judgment:

[0045]In the voice enhancement of the ultrashort wave radio station, according to the structural characteristics of the ultrashort wave radio station, a carrier lock indicator is added to the voice enhancement to judge whether there is a signal. Noise sampling starts when the carrier indicator is turned on. By default, after the carrier indicator is turned on, the few frames before the voice starts are noise frames. Because in the communication process, there is a process from pressing the sending and receiving control switch to starting to speak, and according to the short-term stability requirements of the voice signal, each frame signal is about 10 to 30 milliseconds, and there are two frames between frames. Ther...

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Abstract

The invention discloses a speech enhancement method applied to an ultra-short wave radio station. The speech enhancement method include that a received speech signal is preprocessed, and then an enhanced speech signal is obtained by using a maximum posterior probability algorithm; in a calculation process by using the maximum posterior probability algorithm, the a priori SNR parameter is optimizedby an adaptive filter. The method combines the characteristics of the ultrashort wave radio station, combines the ultrashort wave radio station and the speech enhancement technology more effectively,accurately estimates the noise, improves the speech enhancement effect, and optimizes the speech enhancement algorithm to significantly improve the SNR.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a voice enhancement method applied to an ultrashort wave radio station. Background technique [0002] At present, improving the voice signal-to-noise ratio of ultrashort-wave radio stations mainly starts with improving channel indicators, improving modulation and demodulation methods, and optimizing circuit design. Although these methods can improve the speech signal-to-noise ratio to a certain extent, the effect is not ideal. Especially for the interference of background noise between voice communications, these methods cannot improve the voice signal-to-noise ratio at all. Therefore, how to improve the voice signal-to-noise ratio of ultrashort wave radio is one of the difficulties of ultrashort wave radio, and it is also one of the important symbols reflecting the performance of ultrashort wave radio. [0003] Speech enhancement technology is one of the methods that can...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10L21/0208G10L21/0216
CPCG10L21/02G10L21/0208G10L21/0216
Inventor 姚元飞王群陈洪瑀
Owner CHENGDUSCEON TECH
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