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视频编码器正常时关键点的信号波形如图44所示。为方便维修,现给出常用视频编码器重要检测脚,见表5。徒弟:视频信号处理电路的常见故障有哪些?师傅:视频处理电路的作用是:对MPEG-1/2解码后的数字视频信号进行D/A变换和NTSC/PAL制式编码,产生模拟视频信号(复合视频信号V或亮度Y
The signal waveform of the key point when the video encoder is normal is shown in FIG. 44. For the convenience of maintenance, we now give the common video encoder important detection feet, see Table 5. Apprentice: What are the common faults of video signal processing circuit? Master: The role of video processing circuit is: D / A conversion and NTSC / PAL encoding of the digital video signal decoded by MPEG-1/2 to generate analog video signal Composite video signal V or brightness Y