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语言信号低比特率传输一直受到通信工程领域内专家们的极大重视,大量的工作正集中于高质量低比特率窄带传输技术的研究。窄带传输技术就是声码器。声码器系统由于其实现方式不同,可有很多种类,但它们都属于分析/综合型。随着集成电路技术的发展,声码器技术的研究也进入了一个全新的阶段,声码器及其结合系统技术正日臻完善。
Low-bit-rate transmission of speech signals has drawn great attention from experts in the field of communications engineering. Much work is focusing on the research of narrowband transmission technology with high quality and low bit rate. Narrowband transmission technology is vocoder. Vocoder systems can have a wide variety of different implementations, but all fall into the category of Analysis / Synthesis. With the development of integrated circuit technology, the research of vocoder technology has also entered a brand-new stage, and the vocoder and its combined system technology are improving.