987, Limiting of Space-sRGB. Television for Standard 4:3 and YUV digital video signals, BBC 6. IEC 61966-2-2, 2003, Colour Widescreen 16:9 Aspect Ratios. Research Department Report BBC Management-Extended RGB Colour 10. ITU-R BT.709-5, 2002, Parameter RD1987 22. Space-scRGB. Values for the HDTV Standards for 3. EIA Standard EIA-189-A, July 1976, 7. IEC 61966-2-4, 2006, Colour Production and International Encoded Color Bar Signal. Management-Extended-Gamut YCC Programme Exchange. 4. Faroudja, Yves Charles, NTSC and Colour Space for Video Applications- 11. Photo CD Information Bulletin, Fully Beyond. IEEE Transactions on xvYCC. Utilizing Photo CD Images-PhotoYCC Consumer Electronics, Vol. 34, No. 1, 8. ITU-R BT.470-6, 1998, Conventional Color Encoding and Compression February 1988. Television Systems. Schemes, May 1994, Eastman Kodak Company. Chapter 7.3 Video signals overview Keith Jack Video signals come in a wide variety of options-number Coding ranges of scan lines, interlaced VS. progressive, analog VS. digital, and SO on. This chapter provides an overview of the The selection of the coding ranges balanced the common video signal formats and their timing. requirements of adequate capacity for signals beyond the normal range and minimizing quantizing distortion. Although the black level of a video signal is reasonably Digital component video well defined, the white level can be subject to variations due to video signal and equipment tolerances. Noise, gain background variations, and transients produced by filtering can pro- duce signal levels outside the nominal ranges. In digital component video, the video signals are in digital Either 8 or 10 bits per sample are used for each of the form (YCbCr or R'G'B'), being encoded to composite YCbCr or R'G'B' components. Although 8-bit coding NTSC, PAL, or SECAM only when it is necessary for introduces some quantizing distortion, it was originally broadcasting or recording purposes. felt that most video sources contained sufficient noise to The European Broadcasting Uni