Speech signal processing method and speech signal processing device
A voice signal processing and voice technology, applied in voice analysis, instruments, etc., can solve problems such as poor security of voice communication, achieve the effect of improving user experience, improving quality, and avoiding abnormal encrypted calls
Active Publication Date: 2016-11-23
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology
However, the voice encryption technology in the prior art is limited by the key used and the encryption and decryption algorithm, and there is a problem of poor voice communication security
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[0067] During voice communication, the sending device first processes the voice input by the user, and then sends the processed voice signal to the receiving device through the network. When the receiving end device receives the voice signal sent by the sending end device, it undergoes corresponding processing and outputs the processed voice signal to the user, so that the voice communication between the sending end device and the receiving end device can be realized.
[0068] The short-term stationarity and partial quasi-periodical characteristics of the speech signal make the speech signal redundant. The general practice in the prior art is to compress and encode the speech source input by the sending device first, and then decode it after reaching the receiving device, so as to improve the transmission efficiency of the speech signal and the utilization efficiency of the transmission medium.
[0069] At the same time, in order to improve the security of communication, the v...
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A speech signal processing method and a speech signal processing device are disclosed. The method comprises the following steps: converting a collected time-domain speech signal into a digital speech signal and framing the digital speech signal to get corresponding digital speech frames; converting the obtained digital speech frames to the frequency domain to get corresponding frequency-domain speech data, wherein the frequency-domain speech data includes the frequency information of the corresponding digital speech frames; using corresponding encryption information to encrypt the frequency-domain speech data corresponding to a preset number of digital speech frames in a preset encryption cycle, wherein the encryption information includes an encryption key and an encryption algorithm, and the frequency-domain speech data corresponding to the digital speech frames in the same bit order in each encryption cycle is encrypted using the same encryption key and the same encryption algorithm; converting the encrypted frequency-domain speech data to the time domain to get encrypted digital speech data frames; and compressing and sending the encrypted digital speech data frames. The scheme can improve the security of speech communication.
Description
technical field [0001] The invention relates to the technical field of voice communication, in particular to a voice signal processing method and device. Background technique [0002] When the mobile terminal performs voice communication in the operator's network, the voice signal has the characteristics of short-term stationarity and partial quasi-periodicity, so that the signal has redundancy. The voice source is compressed and encoded, and then decoded after reaching the receiving end to improve the transmission efficiency of voice signals and the utilization efficiency of transmission media. [0003] In order to improve the security of voice communication, voice encryption technology is usually used to encrypt the voice source sent by the sending end device. However, the voice encryption technology in the prior art is limited by the key used and the encryption and decryption algorithm, and there is a problem of poor voice communication security. Contents of the invent...
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Inventor 姜山刘智勇郎冬玲
Owner SPREADTRUM COMM (SHANGHAI) CO LTD