When the right coding mode is chosen, baud rate should be set more than digital signals transmission velocity, and the speech communication quality can be guaranteed.
在正确选择编码方式后，波特率设置为大于数字信号传输速率，可保证语音通信质量。
IntroductionIn the communication systems, echo and noise will seriously affect speech communication quality, such as IP telephone, videophone and hand-free digital cell phone systems etc.
引言在通信系统中，例如IP电话、可视电话及免提数字蜂窝电话系统中，回声和噪声会严重影响通信质量。
Learn new words and add quality to your speech. It also helps to improve your written communication as well.
学习新的词汇，丰富你的言语，这也有助于提高你的书面交流能力。
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