双音多频是一种在话音信道用音调来表示数字的方法，它可以用来在模拟话音信道传输信令，因此在通信中有广泛的应用。
Provide is a voice channel and tone to represent Numbers method, which can be used to transmit analog voice, so in communication has been widely used.
双音多频(DTMF)是一种在话音信道用音调来表示数字的方法，它可以用来在模拟话音信道传输信令，因此在通信中有广泛的应用。
Provide (DTMF) is a voice channel and tone to represent Numbers method, which can be used to transmit analog voice, so in communication has been widely used.
设计出了二次调制系统：采用连续可变斜率增量调制（CV SD）实现模拟话音信号与数字编码的转换，采用二进制相对相移键控（2DPSK）作为数字调制方式。
A twice modulation is designed:, CVSD was adopted to realize conversion between analog and digital voice signals, 2DPSK was used as the digital modulation mode.
一种数据信道，其传输的信息可取该信道规定界限内的任何值。话音信道就是模拟信道。
A data channel on which the information transmitted can take any value between the limits defined by the channel. Voice - grade channels are analog channels.
本文提出了一种宽带分布式网络设计，该网络能在CATV电缆上同时进行数据、实时数字话音及模拟电视通信。
A broadband distributed network design is proposed. This network can provide data, real-time digitized voice and analog video communications on a single CATV cable.
第一代移动通信系统（1G）是模拟制式的蜂窝移动通信系统，主要提供话音服务。
The first generation of mobile communication (1G) is cellular mobile communication based on analog signal, and it mainly provides voice service.
模拟结果表明，该协议能满足话音的实时要求，性能良好，且数据传输性能没有明显下降。
Simulation result shows that the protocol is suitable for real-time voice communications and the performance for data transmission has no significant degradation.
话音信号是一个模拟信号，通过采样、量化和编码，我们可以实现话音信号的数字传输。
The speech signal is a analog one, and we can perform its digital transmission by sampling, quantizing and coding.
第一代移动通信系统(1g)是模拟制式的蜂窝移动通信系统，主要提供话音服务。
The first generation of mobile communication systems (1g) was analog cellular system for mobile communication standard with the main voice services.
根据电离层影响无线电波传输的有关理论，本文设计并实现了一种基于DSP的话音带宽短波信道模拟器。
In this paper, a DSP-based HF channel simulator within audio bandwidth is designed and implemented based on the concerned theory on the effects caused by the ionosphere in radio wave.
与模拟系统相比，控制方便、系统容量大、话音质量好，适合在大型会议等场合使用。
Compare with analogue system, this system has features of large system volume and good speech quality in audio data transmission and process, it is suitable for conference.
计算机模拟结果表明，M—LPC算法可合成高质量的话音。
The computer simulation results show that the m-lpc algorithm can produce high quality speech at 2.4kbps.
计算机模拟结果表明，M—LPC算法可合成高质量的话音。
The computer simulation results show that the m-lpc algorithm can produce high quality speech at 2.4kbps.
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