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digital multiplexed
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  多路数字
     This paper discusses the design question about the digital multiplexed sound channel in television broadcasting sysytems.
     本文论论广播电视系统中多路数字伴音信道的设计问题。
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     Digital
     数字
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     Digital Library
     数字图书馆
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     EXPERIMENTAL DIGITAL TRANSMISSION OF MULTIPLEXED VIDO AND AUDIO SIGNALS AT 120 MBIT/S"
     120Mbit/S多路视频和音频信号的数字传输实验
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  digital multiplexed
DLC Digital Loop Carrier a system for transmitting digital multiplexed data signals using existing cabling for distribution.
      


This paper discusses the design question about the digital multiplexed sound channel in television broadcasting sysytems. The relationship between the system parameters and the eye pattern opening of the output signal is given. When a simple filter in the receiver is uscd, the overall channel is optimized. Optimal parameters of the complex shaping filter in the transmitter are determined, in order that the maximum eye pattern opening of the output signal is obtained. Tire intersymbol interference caused...

This paper discusses the design question about the digital multiplexed sound channel in television broadcasting sysytems. The relationship between the system parameters and the eye pattern opening of the output signal is given. When a simple filter in the receiver is uscd, the overall channel is optimized. Optimal parameters of the complex shaping filter in the transmitter are determined, in order that the maximum eye pattern opening of the output signal is obtained. Tire intersymbol interference caused by the receiver is effectually climinated. A numcrical example is also given here.

本文论论广播电视系统中多路数字伴音信道的设计问题。给出了系统参数与输出信号眼图开启度之间的关系式。在接收端采用简化滤波器的条件下,对全信道进行优化设计。以确定发送瑞复杂的成形滤波器最佳参数,保证输出信号眼图开启度最大,从而有效地消除接收滤波器带来的符号间干扰。本文还给出了数字实例。

In this paper,the principles of data companding and data information encoding of near-instantaneously companded audio multiplex system which will be put into prac- tice in July this year in Hong Kong are described in detail.The differences in fre- quency spectrum among the systems of PAL/I and PAL/D are compared and the allocation and accomodation of the new digital multiplexed subcarrier is determined. The potential problems on watching and listening the digitalized stereo signals are also pointed out...

In this paper,the principles of data companding and data information encoding of near-instantaneously companded audio multiplex system which will be put into prac- tice in July this year in Hong Kong are described in detail.The differences in fre- quency spectrum among the systems of PAL/I and PAL/D are compared and the allocation and accomodation of the new digital multiplexed subcarrier is determined. The potential problems on watching and listening the digitalized stereo signals are also pointed out for taking into the consideration by the personals who are taking charge of networking and refitting the existing TV transmitters and color TV sets.

本文介绍了香港即将开播的彩电数字伴音广播的数据压扩技术及数据信息编码方法,比较了 PAL/I和PAL/D制的频谱差别,并确定了频谱分配,也指出了收听时可能存在的问题,供建网人员及国内收发设备改装人员参考.

 
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