光纤数字传输多路视频和音频信号，适用于多媒体应用

ISCE '97. Proceedings of 1997 IEEE International Symposium on Consumer Electronics (Cat. No.97TH8348) Pub Date : 1997-12-02 DOI:10.1109/ISCE.1997.658407

H. Asada, T. Yamada, N. A. Rabou, H. Ikeda, Y. Shimodaira, H. Yoshida

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引用次数: 1

摘要

本文介绍了一种新的数字NTSC电视和音频信号传输系统，该系统在对图像质量主观评价的基础上，简化了电路配置，使其比mpeg2更便宜。由于将数字音频信号插入到数字NTSC电视信号的水平同步脉冲中，传输速率保持不变，因此可以很容易地将NTSC电视信号和音频信号同时传输到接收机。该系统具有三个特点。首先，即使再现的图像质量低于以4.00/spl次/fsc采样频率、8位量化水平获得的正常数字NTSC电视图像编码，该系统仍能给出令人满意的图像质量，足以操作消费者使用的视觉设备。其次，即使没有采用mpeg2等先进的压缩技术，系统也能以50mbps的低传输速率传输NTSC电视图像代码。第三，将数字音频信号插入到数字NTSC电视信号的水平同步脉冲中进行传输。边缘发光led (ELEDs)和单模光纤的组合使系统能够轻松地通过SM光纤在10公里的距离上传输数字NTSC电视图像信号和数字音频信号。

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Optical fiber digital transmission of multiplexed video and audio signals suitable for multimedia applications

This paper describes a new digital NTSC TV and audio signal transmission system in which circuit configurations are simplified and made more inexpensive than MPEG 2 on the basis of the subjective evaluation of the picture quality. An NTSC TV signal and an audio signal can easily be transmitted to the receiver at the same time, since the transmission rate is kept unchanged due to the insertion of the digital audio signal into the horizontal sync pulse of the digital NTSC TV signal. The proposed system has three features. Firstly, the system could give satisfactory picture quality enough to operate consumer-use visual appliances even though the quality of the reproduced pictures is lower than that of the normal digital NTSC TV picture codes obtained at a sampling frequency of 4.00/spl times/fsc with a quantizing level of 8 bits. Secondly, the system can satisfactorily transmit NTSC TV picture codes at a low transmission rate of 50 Mbps even if such an advanced compression technique as MPEG 2 has not been used. Thirdly, the system is used for transmission of the digital audio signals which are inserted into the horizontal sync pulse of the digital NTSC TV signal. A combination of edge-emitting LEDs (ELEDs) and single-mode (SM) optical fibers enable the system to easily transmit a digital NTSC TV picture signal together with digital audio signals over the distance of 10 km through the SM optical fibers.

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ISCE '97. Proceedings of 1997 IEEE International Symposium on Consumer Electronics (Cat. No.97TH8348)

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