【摘要】 本文研究带冲突检测的载波监听多址协议(CSMA/CD)局域网的语音/数据综合传输的可行性。提出采用变速率语音编码的方法,用以改善在重负荷条件下语音/数据综合传输的性能。采用计算机模拟方法,给出了语音包丢失、传输后语音质量的主观评价与语音传输容量的关系曲线,以及语音传输容量与数据业务率的关系曲线。结果表明,在CSMA/CD局域网上采用变速率语音编码的方法,改善了其语音/数据综合传输的性能。更多还原

【Abstract】 This paper researches on the feasibility of comprehensive transmission of voice/data in the local network of multi-address agreements(CSMA/CD), which has the function of carrier wave and monitor with conflicting examination. It presents a method which adopts the voice coding with a speed - changing rate to improve the comprehensive transmission of voice/data under the condition of heavy load。 It adopts the method of computer simulation and gives out a curve of relationship between the capacity of the voice transmission and the subjective evaluation of voice quality after the loss of the voice package and the transmission. It also gives out a curve of relationship between the capacity of voice transmission and the rate of data service。 The research shows that the method adopting the voice coding of a speed - changing rate on the local network of CSMA/CD, has improved the function of the comprehensive transmission of voice/data.更多还原