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美国贝尔公司将高清晰度电视信号通过光缆传送40公里以上距离,图象质量无损伤。该公司说,这次试验表明,可以用宽频带光缆网经济地传送数字高清晰度电视信号。将来光缆网可能进入家庭。这次试验是将模拟高清晰度电视信号变换成数字信号,以每秒622兆比特通过光缆传送。在光缆的另一端进行相反处理。该公司的另一个研究所的研究人员也用计算机进行模拟试验并研制出硬件,将高清晰度电视信号压缩到每秒155兆比特。研究人员说,每秒155兆比特不会损伤图像质量。
The United States will Bell high-definition television signals transmitted over 40 km cable distance, image quality without damage. The company said the trial shows that it is possible to cost-effectively transmit digital HDTV signals over broadband fiber optic cable networks. In the future fiber optic cable network may enter the home. The experiment was to convert analog high-definition television signals into digital signals at 622 Mbits / sec using optical cables. Proceed to the opposite end of the cable. Researchers at another research firm at the company also used computers to simulate experiments and developed hardware to compress high-definition television signals to 155 megabits per second. The researchers said that 155 megabits per second will not damage the image quality.