Design of Voice Encoder/Decoder Based on Speex Algorithm
Kun Han · Computer Knowledge and Technology · 2012
The voice encoding has developed rapidly,and there are a lot of changes in the quality and the rate.Speex which is a powerful speech engine developed in recent years can achieve high quality and low bit rate voice encoding.The features and ben efits of Speex encoding / decoding algorithms is introduced in this article,and then the Speex algorithm theory,including the pre-processing module,Speex narrowband and broadband sub-mode coding principles are analyzed.Also the voice encoder and decoder based on the libspeex and libspeexdsp libraries are developed to achieve the compression and decompression of the voice data,and finally the program function is tested.