 7.2. ways of doing it. S-Video was developed for connecting consumer equipment together (it is not used for broadcast purposes). It is a set of two analog signals, one gray-scale Analog vs. digital (Y) and one that carries the analog R-Y and B-Y color information in a specific format (also called C or chroma). Until a few years ago, most video equipment was designed Once available only for S-VHS, it is now supported on primarily for analog video. Digital video was confined to most consumer video products. professional applications, such as video editing. Although always used by the professional video market, The average consumer now uses digital video every analog RGB video data has made a temporary comeback day thanks to continuing falling costs. This trend has led for connecting high-end consumer equipment together. to the development of DVD players and recorders, Like S-Video, it is not used for broadcast purposes. digital set-top boxes, digital television (DTV), portable Avariation of the Y, R-Y, and G-Y video signals, called video players, and the ability to use the Internet for YPbPr, is now commonly used for connecting consumer transferring video data. video products together. Its primary advantage is the ability to transfer high-definition video between con- sumer products. Some manufacturers incorrectly label Video data the YPbPr connectors YUV, YCbCr, or Y(B-Y)(R-Y). Initially, video contained only gray-scale (also called black-and-white) information. Digital video While color broadcasts were being developed, attempts were made to transmit color video using analog The most common digital signals used are RGB and RGB (red, green, blue) data. However, this technique YCbCr. RGB is simply the digitized version of the analog Communications Engineering Desk Reference; ISBN: 9780123746481 Copyright © 2007 Elsevier Inc. All rights reserved CHAPTER 7.1 Introduction to video RGB video signals. YCbCr is basically the digitized ver- IMAGE 4 sion of the analog YPbPr video signals, and is the format IMAGE 3 IMAGE 2 