Method for hiding redundant information in G.711 phonetic coding
A G.711, redundant information technology, applied in speech analysis, instruments, etc., can solve the problems of limited telephone bandwidth, uneconomical processing, large amount of calculation, etc., to achieve good voice quality, smooth voice, strong anti-transformation performance. Effect
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[0032]Without changing the original G.711 voice data coding, transmission, and restoration methods, the voice information contains hidden redundant information through buffering and pre-processing before voice coding, and buffering synchronized with decoding is added at the decoding end Synchronous processing with post-processing to restore normal voice. When packet loss occurs, the data containing the characteristics of the lost packet in the adjacent packet is obtained from the buffer, and the main voice signal of the lost packet is reconstructed, so as to realize the compatibility on the basis of G.711 coding. On, enhance the anti-packet loss performance of the call.
[0033] Such as figure 1 As shown, the method for hiding redundant information in G.711 speech coding, the specific process is: ① carry out pre-processing to the speech signal, establish the speech transmission data buffer, transform each piece of speech signal in the buffer to the frequency domain , accordin...
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