Research Of Speech Codec Variable-order LPC's Implementation Based On DSP

Speech Single Processing is the across of Speech and Digital SingleProcessing. With the fast developing of modern communications, thetechnology of using speech coding is increased. Through construct thecorrespondence hardware platform all kind of correlationcommunications task could complete by software. It is in fashion thatstudy the system of constructed with a highly flexible, open speechcommunication. Modern DSP processors have greatly facilitated toachieve this overall program. At the same time, as a specious instrumentwhich can implement arithmetic of Speech Single Processing in real-timeall and speediness, DSP has been developed fast.Research based on the Linear Predictive Coding LPC-10, arm at thenatural of speech compose and anti-noise in this dissertation. Firstly, thecourse of speech coding development and trend and speech single LinearPredictive analyses was introduced. Secondly, a variable-order linearpredictive model, based on the tube models and the digital model ofspeech generating, is proposed. Finally, the real-time implementation ofVO_LPC-10 coding algorithm is built on TMS320VC5509 based DSPplatform, and deeply study the Universal Serial Bus (USB) of 5509 DSP,use the USB interface come true the data communication of PC and DSP.The hardware and software design and implementation are discussedin detail around the core which is TMS320VC5509. This real-timesystem set up a firm foundation for building embedded speechcommunication platform.