A method and device for voice adaptive discontinuous transmission
An adaptive and non-continuous technology, applied in speech analysis, instruments, etc., can solve problems such as high computational complexity and inability to flexibly track signal changes, and achieve low average bit rate and guaranteed sound quality
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Embodiment approach 1
[0040] In Embodiment 1, the silence insertion description frame processing unit is further configured to determine that the absolute value of the spectrum energy of the speech signal frame and / or the absolute value of the spectrum energy of the last silence insertion description frame is greater than a single frame energy threshold and the When the difference between the spectrum energy of the speech signal frame and the spectrum energy of the previous silence insertion description frame is greater than a preset limit 1, the silence insertion description frame is sent.
[0041] The silence insertion description frame processing unit is also used to judge that the absolute value of the spectrum energy of the speech signal frame and / or the absolute value of the spectrum energy of the last silence insertion description frame is greater than the single frame energy threshold and the speech signal frame The difference between the spectrum energy and the spectrum energy of the last s...
Embodiment approach 2
[0044] In Embodiment 2, when the silence insertion description frame processing unit is used to judge that the absolute value of the spectrum energy of the speech signal frame and / or the absolute value of the spectrum energy of the last silence insertion description frame is greater than the single frame energy threshold, according to Calculate the spectral correlation value of the current speech signal frame and the spectrum energy of the last silence insertion description frame, and send the silence insertion description frame when it is judged that the spectrum correlation value is smaller than the spectrum correlation threshold.
Embodiment approach 3
[0045] In the third embodiment, the silence insertion description frame processing unit is used to simultaneously determine whether to send the silence insertion description frame based on the difference between the spectrum energy and the spectrum correlation value of the two.
[0046] Such as figure 2 As shown, the device may also include a smoothing filter unit; the smoothing filter unit is used to smooth and filter the frequency domain signal of the voice signal, and then input it to the silence insertion description frame processing unit, and the silence insertion description frame processing unit performs smoothing processing After the frequency domain signal is subjected to the above processing, the silence insertion description frame storage unit also needs to store the smoothed frequency domain signal.
[0047] The method for performing speech adaptive discontinuous transmission includes: in performing speech adaptive discontinuous transmission, deciding whether to s...
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