Black and white TV
Black and white TV, is a can only display black and white TV. In the early stages of the development of television, including television programs and television reception shows, can only reflect the black and white two colors. With the development of science and technology, in the 1950s, the gradual emergence of color television. Black and white TV is not only black and white, it is dealing with gray-scale signal, black and white video has Y (Luma, Luminance) video, that is, grayscale value. To the color TV specifications to develop, is YUV / YIQ format to deal with color television images, the UV as the saturation of the C (Chrominance or Chroma), if you ignore the C signal, then the remaining Y (Luma) signal Just like the previous black and white TV signal the same, this way to solve the color TV and black and white TV compatibility issues. ...