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我国电视发射机功率比的标准,现在尚未确定,有关部门正在试验;据国外资料介绍:降低电视发射机的伴音对图象功率比能提高电视质量,例如:黑白电视机由于降低伴音功率而减少了声音干扰图象的网纹,彩色电视接收机减少了伴音与色副载波间的差拍干扰等等,提高了图象质量;而且,伴音功率的降低能节省各电视台,特别是转播台的设备,维护费用等,对进一步发展的电视多伴音和电视卫星广播都有一定好处。下文“电视发射机的伴音对图象功率比”介绍了日本在功率比方面的试验情况和结果,美国在功率比方面的争论等,这些仅供有关部门和各电视台在试验中参考。
According to the introduction of foreign materials, reducing the audio-to-image power ratio of the TV transmitter can improve the TV quality. For example, the black-and-white TV set decreases due to the reduction of sound power The sound interference image of the network, color TV receiver to reduce the sound and color subcarrier beat interference, etc., improve the image quality; Moreover, the reduction of sound power can save all television stations, especially the relay station Equipment, maintenance costs, etc., for further development of television and audio and television satellite broadcasting have some benefits. The following article, “Power Ratio of Television Transmitters to Image Power”, introduces Japan’s test results and results in terms of power ratio and the United States controversy in terms of power ratio. These are for reference only by relevant departments and television stations in their experiments.