Realization of Interleaving in Voice Channel Coding of TETRA Digital Trunking Communication System with FPGA

用FPGA实现TETRA数字集群通信系统 语音 信道编码中的交织器

This paper introduces the implementation of the high performance wireless data transmitter . The transmitter works in the wireless voice channel ( 25 kHz bandwidth ) and the transmission data rate is 9 600 / 19 200 bit / s.

介绍了一种高性能的利用无线 话音 信道（25kHz信道带宽）传输数据速率为9600/19200bit/s的无线数传机的研制。

The IPCB implementation is proposed to connect the voice service of enterprise based on Channel Bank and VoIP Gateway to IP network .

提出了一种基于 ChannelBank和VoIP语音网关的将大客户 语音接入IP网络的IPCB方案。

Early signaling systems used in-band signaling where a portion of the voice channel was allocated for signaling .

早期的信令系统使用的是带内信令，即将 语音 信道的一部分划分出来供信令使用。

Base on this main functions for intelligent adapter and interaction of video and voice channel provided by system platform are discussed and core processes of interaction and fall back of video phone service and voice service are also analyzed .

在此基础上，讨论系统平台对视频、 语音 话 路的智能适配、交互的主要功能，分析可视电话业务和语音业务的交互、回落处理等核心流程。

General test method for transmission performance of PCM voice channel in telecommunication network

GB/T7609-1995电信网中脉冲编码调制 音频 通路传输特性常用测试方法

The protocol is analyzed by embedded Markov process from which some important performance measures such as voice packet loss rate average channel access delay of data messages and system throughput are formulated .

文中对协议进行了理论分析，并推导出了协议的重要性能指标（如 话音分组丢失率、数据报文平均 接入时延、系统平均吞吐率等）的解析表达式。

The analysis results show the performance of network is good enough to transmit the voice data when the channel is badly disturbed by noise as the Power Distribution Network takes the Reservation-Polling access control strategy .

分析结果表明，配电网采用这种预约&轮询接入控制策略时，在 信道噪声干扰十分严重的情况下，网络仍然能够实现 语音数据的正确传输。

With the development of the Internet technology and the complication and personalization of customers ' requirements fixed-phone will break out the limitation of being a sole voice channel and become a communicating platform of literal message .

随着internet技术的发展和用户对业务需求日益复杂化和个性化，固定电话将突破原有的单一 语音 通道而成为文字消息交互平台；

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 .

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。

Compared with the existing taxicab dispatching system the system which based on the analog wireless voice channel can transmission the digital signal with the advantage of cost-saving no need to dial-up and connect faster .

经过对现有出租车调度系统的分析比较，提出一种基于模拟无线 话音 信道传输数字信令的方法，具有节省费用、无需拨号、连线快捷的优点。

Considering that the requirement of the voice terminal for channel resource in different phase of communication progress is different a new scheme of PRMA named PRMA-AC is proposed which aims to decrease the channel contention and improve the quality of service by adopting an access control mechanism .

该文提出一种利用 话音终端在通话的不同阶段对 信道资源的不同需求对终端进行区分的方案PRMA-AC，据此引入一种接入控制机制，以减少信道竞争，提高系统服务质量。

More than twice of the interpolation gain ( IG ) can be obtained by applying DSI to the voice channel . The adaptability of the packet switching networks to the source rate makes it easy for DSI to be realized .

在 话音 信道中采用DSI技术可获得不少于两倍的插空增益，而各种包交换系统对信源速率变化的适应性又使得DSI的实现非常容易。

The Analysis and Realization of the Voice Channel Clearance Based on Dialogic Voice Board

Dialogic语音卡 通道清空的分析与实现

Judging from the current test operation of the IPTV business situation it still has a few gaps comparing with the cable television for examples image clarity mouth shape and voice synchronization channel switching time the number of channels .

从目前IPTV业务的试运营情况看，它在图像清晰度、 唇音同步、 频道切换时间、频道数目等方面还较有线电视网有一些差距。

Design of Voice Channel Characteristic Test System by Virtual Instrument Technology

用虚拟仪器设计 话 路特性测试系统

Test of Voice Channel in CDMA Base Station Controller

CDMA基站控制器 话音 通路的测试

VC - identifies the type ( s ) of voice channel ( VC ) radio equipment technology equipped on this neighbor face and server group .

VC&标识装配在该相邻接口和服务器群上的 语音 信道（VC）无线电设备技术的类型。

Two-way Precision Time Synchronization System via a Satellite Voice Channel

卫星双向 话音 通道高精度时间同步系统

A Method to Realize Voice Paging System on SCA Channel

一种在SCA 信道上实现 语音寻呼系统的方案

To ensure the reliable transmission of voice and data the channel encoding method which the digital trunking communication system uses is CRC ( circle redundant code ) RCPC ( rate-compatible punctured convolution code ) interleave .

为了保障 话音和数据的可靠传输，数字集群系统采用的 信道编码方案为CRC+RCPC+交织。

Performance Analysis of Voice Quality Measurement on HF Channel

基于军标的短波 信道 语音质量估计算法性能分析

In this paper by constructing a model of voice we investigate some channel assignment strategies for both the AMPS and the CDPD system and their effects on the CDPD channel holding time .

通过建立一个 话音模型，对CDPD如何选择 信道才能获得最佳的数据传输作了理论分析和探讨。

Bandwidth of one voice channel

一个 语音 频道的频宽

The auxiliary channels have one digital voice channel one EOW channel and one data channel .

辅助信道拥有一个数字 音频 信道、一个EOW通道和一个数据通道。

With the increasing demand of data communications data calls and voice calls start competing the limited channel resources .

随着数据通信业务需求的日趋增大，数据通信和 话音通信之间也开始相互竞争有限的 频率资源。

Test the error code and voice channel quality are very important to analyse the performance of digital transfers system .

测量系统的误码率和 话音 通道质量对数字传输系统性能分析具有重要的意义。

Voice channel is a most widely used communication media with a narrow frequency band and high ratio of signal to moise .

语音 信道是应用最为广泛的一种通信媒体。其特点是，频带较窄，信噪比较高。

Because VHF voice channel is a narrow band ( 25KHz ) so in the system we design hardware circuit based on AMBE speech compression to realize low digital speech code rates .

在系统设计的过程中，我们根据海上VHF 语音 信道带宽的窄（25KHz）特点和系统的需要，设计了基于AMBE压缩算法的硬件电路，实现了语音的低速率编码；