宽屏幕彩电中的压缩技术

Color TV Data Compression in Wide Screen

对现有１６：９宽屏幕彩电在接收４：３宽高比图像出现的水平失真现象，提出了一种实用的数字压缩技术，将亮度信号（Ｙ）、二个色差信号（Ｒ－Ｙ、Ｂ－Ｙ）进行数字化处理，按一定规则在存贮器中实现对信号的存取，实现图像在时间轴上的压缩，解决了图像的水平失真问题．文中在理论分析的基础上给出了实用的电路原理图．

In order to mitigate the effect of horizontal distortion when receiving signals with width to height ratio of 4:3,a new data compression techinque is proposed for the 16:9 wide screen color TV.The Brightness(illuminance)signal(Y)and two color difference signals(R-Y,B-Y)are digitized before they are stored in or retrieved from the memory according to some pre specified rules,achieving temporal image compression.A practical circuit diagram is also presented in the paper.