色差端子（英语：Component Video Connector）是把模拟视频中的明度、彩度、同步脉冲分解开来各自发送的端子。在没有其他限定条件时，该词即指YP_BP_R接口。

早期电视信号的复合传送方式在数学上有着根本的限制，一旦明度与色度复合之后即无法完全分离。因此，在1980年代后期，从专业用的视讯编辑应用当中开始出现了将明度与色度分离记录与传送的系统。虽然系统设计上比起复合信号复杂许多，不过显示器与摄录像机等装置其实本来就必须将明度与色度分开之后才能显示或记录。采用分量系统将可免除互相复合与分离所造成的画质损失。因此1990年代中期开始也开始普及至家用电视上面。

Component video is a video signal that has been split into two or more component channels. In popular use, it refers to a type of component analog video (CAV) information that is transmitted or stored as three separate signals. Component video can be contrasted with composite video (NTSC, PAL or SECAM) in which all the video information is combined into a single line-level signal that is used in analog television. Like composite, component-video cables do not carry audio and are often paired with audio cables.