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数字电视是在模拟电视以后发展起来的,因此在选择数字电视信号参数时,要考虑到使数字电视设备具有最大兼容性,且希望现存的模拟电视制式能在数字范围内得到统一。1982年国际无线电咨询委员会(CCIR)正式向各国推荐电视演播室数字电视的分量编码标准。 一、图像质量的主观评价 数字电视信号有抽样频率、量化比特数、数码率、误码率和时钟抖动量等主要参数。根据图像应用范围及传输条件的不同,对图像质量也有不同的要求,各参
Digital television was developed after analog TV. Therefore, when choosing digital TV signal parameters, it is considered that maximum compatibility should be given to digital TV apparatus, and it is hoped that the existing analog TV system can be unified in the digital range. In 1982, the International Radio Consultative Committee (CCIR) formally recommended to all countries the component encoding standard for digital television in television studios. First, the subjective evaluation of image quality Digital TV signal sampling frequency, the number of bits, digital rate, bit error rate and clock jitter and other key parameters. According to the image range of applications and transmission conditions, the image quality also has different requirements, each parameter