Then: Interface standards
Engineers on the National Television System Committee (NTSC) developed the first monochrome analog NTSC standard. It was adopted in 1941and then modified in 1953 in what would become the RS-170a standard to incorporate color while remaining compatible with the monochrome standard. This standard is still used in numerous digital CCD and CMOS-based cameras and frame grabber boards, allowing 525 line images to be captured and transferred at 30fps.
Television standard committees also developed high-definition serial digital interfaces such as SDI and HD-SDI. Although developed for broadcast equipment, they are also supported by computer interface boards, allowing HDTV images to be transferred to host computers. To network these computers together, XEROX PARC developed the Ethernet cable in the mid-1970s. It was formally standardized in 1985 and has become the de-facto standard for local area networks.
