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为了增加电力线载波机传输容量、提高话音质量 ,提出在研制数字式电力线载波机中使用语音压缩编码技术对传统的模拟式电力线载波机进行改进。通过对各种语音压缩编码方案的比较 ,从中挑选出语音恢复质量高的压缩编码方法——多带激励语音编码算法及基于此算法的性能价格比高的语音压缩编码芯片AMBE- 1 0 0 0 ,设计和实现一种语音压缩速率为 8kb/s的语音压缩编解码器
In order to increase the transmission capacity of power line carrier and improve the voice quality, a speech compression coding technique is proposed in the development of digital power line carrier to improve the traditional analog power line carrier. Through the comparison of various speech compression and coding schemes, the speech compression coding method with high speech recovery quality is selected - Multi-band excitation speech coding algorithm and speech compression coding chip based on this algorithm with high performance-price ratio AMBE-1 0 0 0 , Designed and implemented a voice compression codec with a speech compression rate of 8kb / s