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1.数字电视(DTV)音、视频信号从演播室制作到信道传输直至接收和处理均采用数字技术的电视系统。依据其信启、处理、传输能力,数字电视系统一般可分为标准清晰度电视和高清晰度电视。2.MPEG-1ISO/IEC 11172-1～11172-5是用于数字存储媒体、最佳码率为1.5 Mbps 的活动图像及相关音频的编码标准,生成分辨率为:352×240(NTSC)、352×288(PAL)的 SIF 视频。需要指出的是:MPEG-1并不局限于这种规格,事实上可以高达4095×4095(60帧/秒),但因为压缩效率低会导致更高的码率。同时,MPEG-1规定只用于逐行扫描帧,而不直接提供隔行视频应用。3.MPEG-2ISO/IEC 13818-1～13818-9(其中13818-8已终止),主要应用于码率4 Mbps 以上的环境。在编码方面,MPEG-2可以
1. Digital television (DTV) audio and video signals are transmitted from the studio to the channel until it is received and processed by a digital television system. According to its letter Kai, handling, transmission capacity, digital television systems generally can be divided into standard definition television and high definition television. 2.MPEG-1ISO / IEC 11172-1 ~ 11172-5 is a coding standard for moving picture and related audio for digital storage media with a best bit rate of 1.5 Mbps. The generated resolutions are: 352 × 240 (NTSC), 352 × 288 (PAL) SIF video. It should be noted that: MPEG-1 is not limited to this specification, in fact, up to 4095 × 4095 (60 frames / sec), but because of low compression efficiency will lead to higher bit rates. At the same time, the MPEG-1 specification only applies to progressive frames, rather than providing interlaced video applications directly. 3.MPEG-2ISO / IEC 13818-1 ~ 13818-9 (including 13818-8 terminated), mainly used in code rate above 4 Mbps environment. In coding, MPEG-2 can be