The Algorithm Of Audio Signal Coding And Its Implement Based On DSP

Multimedia communication is a new synthetical technology ,which is rapidly developing rencently. Speech coding is a key technique in multimedia communication and will play a very important role in data compression because of its strong ability of reducing the bit-rates of speech signals.Based on the analysis of short-time calm characteristics of audio signal educing from produce-mechanism of audio signal , then the Linear Prediction coding , the Analythsis-By-Synthesis technology, and Code-Excited Linear-Prediction coding are discussed . After the algorithm of audio compression coding which named Algebraic Code Excited Linear Prediction (ACELP) and Multipulse Maximum Likelihood Quantization(MP-MLQ) and described in the ITU-T Recommendation G.723.1 is analyzed , its implement scheme founded on the hardware system composed of advanced DSP TMS320C5402 is presented . The specific operation method about compressing and coding audio signal is presented , and is validated .