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Speech data processing method for source speech data synchronization before vocoder

A technology of voice data and processing method, which is applied in voice analysis, instrumentation, wireless communication, etc., can solve the problem of audio data being interfered, and achieve the effect of high synchronization accuracy

Active Publication Date: 2019-11-12
河南芯盾网安科技发展有限公司
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Still another object of the present invention is to provide a voice data processing method for synchronization of source voice data before the vocoder, which solves the problem of audio data being disturbed during transmission

Method used

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the embodiments, so that those skilled in the art can implement it with reference to the description.

[0024] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

[0025] A voice data processing method for synchronization of source voice data before a vocoder, comprising:

[0026] The encoding process, which includes:

[0027] Step 1. The front-end device receives a set of audio data to be transmitted, wherein the audio data to be transmitted contains encrypted audio data;

[0028] Step 2, utilizing a plurality of audio data pre-stored in the front device and formulas (1) and (2) to create a pseudo-random sequence SYN1 and a single-tone sequence SYN2,

[0029] replacing the unencrypted audio data in the audio data to be transmitted with a pseudo-ra...

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Abstract

The invention discloses a voice data processing method for vocoder forward information source voice data synchronization. The method comprises: a coding step includes: a pre device receives one group of to-be-transmitted audio data; and SYN1 and SYN2 are established and are used for replacing unencrypted audio data in the to-be-transmitted audio data. A decoding step includes: a maximum correlation value of a pseudorandom sequence is calculated; if the maximum correlation value of the pseudorandom sequence is larger than or equal to a random sequence threshold value, SYN1 existence in the audio data is determined and the position of the SYN1 is determined; a maximum correlation value of a single-tone sequence is calculated; if the maximum correlation value of the single-tone sequence is larger than or equal to a single-tone sequence threshold value, a precise tracking effective mark is calculated; and if the precise tracking effective mark is equal to 1, SYN2 existence in the audio data is determined and the position of the SYN2 is determined. Therefore, fidelity of audio data transmission is improved and the interference on the audio data during transmission can be prevented.

Description

technical field [0001] The invention relates to a voice data processing method used for synchronization of source voice data before a vocoder. Background technique [0002] Source voice data encryption before the vocoder is an important branch of mobile voice encryption communication. Compared with the channel voice encryption that is encrypted and decrypted between the vocoder and the channel codec, the source voice encryption before the vocoder is referred to as the source voice encryption. The quality of source voice encryption is directly affected by the quality of source data synchronization. In the mobile voice channel, the voice data passing through the wireless channel and the vocoder are simultaneously interfered by the wireless channel and compressed by the vocoder, resulting in voice spectrum distortion; sampling clock jitter or data throughput jitter leads to out-of-synchronization of voice sampling. Source voice encryption is to implement encryption and decryp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L25/48H04W12/02
CPCG10L25/48H04W12/02
Inventor 庞潼川杨成功
Owner 河南芯盾网安科技发展有限公司
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