色度采样
4:2:0 色度采样在每条横向扫描线上只有亮度采样的一半，扫描线的条数上，也只有亮度的一半！换句话说，无论是横向还是纵向，色度信号的分辨率都只有亮度信号的一半.“缺失”的色度采样不单单要由左右相邻的采样通过内插补点计算补充，整行的色度采样也要通过它上下两行的色度采样通过内插补点运算获得。
在symbian上随心控制红外线（7） ------ 答疑篇
They have to do with the remote control protocols. Signal gap is the delay between each signal that the remote sends. Signal length is how many 0s and 1s are sent for each code. Repeat codes are used by some remotes to indicate that you're holding a button down -- instead of just sending the same key over and over, it sends the key once and then sends a special code that indicates it's being held. Typical remote controls use a 38KHz carrier wave for modulation, and that normally has a 50% duty cycle.
Comments