语音控制的泛欧洲数字移动无线电系统

IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond Pub Date : 1989-11-27 DOI:10.1109/GLOCOM.1989.64122

C. Southcott, D. Freeman, G. Cosier, D. Sereno, A. van der Krogt, A. Gilloire, H. Braun

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引用次数: 26

摘要

介绍了由CEPT标准化的泛欧数字移动无线电系统的DTX(不连续传输)系统。在这种模式下，当用户开始通话时，发射机打开，当用户停止通话时，发射机再次关闭。使用DTX有两个原因:增加无线电频道的数量(100%或更多)，可以在给定的带宽中容纳，并减少手持便携式设备的功率消耗。值得注意的是，虽然对语音信道的影响很小，而且额外的成本也很少，但DTX将大大增加系统的容量。特别关注了语音活动检测器、舒适噪声子系统、语音帧替换、客观和主观测试以及复杂性。

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Voice control of the pan-European digital mobile radio system

The DTX (discontinuous transmission) system that has been standardized by CEPT for the pan-European digital mobile radio system is described. In this mode the transmitter is switched on when a user begins to talk and switched off again when he or she stops. There are two reasons for using DTX: to increase the number of radio channels (by 100% or more) which can be accommodated in a given bandwidth and to reduce the power drain in hand portable equipment. It is noted that, while adding little degradation to the speech channel and very little additional cost, the DTX will increase considerably the capacity of the system. Particular attention is given to the voice activity detector, the comfort noise subsystem, speech frame substitution, objective and subjective testing, and complexity.<>

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来源期刊

IEEE Global Telecommunications Conference, 1989, and Exhibition. 'Communications Technology for the 1990s and Beyond

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