Autodesk 64006-051108-9001 User Guide - Page 260

252 Glossary Chapter - EventStream event that enables you to add chapters to your QuickTime file for easier navigability through the movie. See Chapter List. Chapter List - QuickTime enables viewers to click a pop-up to jump to selected points in the movie. Chrominance - color component of an image. Cinemascope - very wide (2.21:1) aspect ratio that is one of the standards in MPEG-2. When displayed on a normal television, Cinemascope material requires pronounced "letterboxing" (black bars on top and bottom). Cinepak - codec used for CD-ROM video compression. enables temporal and spatial compression, as well as data rate limiting. Newer codecs, such as Sorenson Video, offer superior image quality and features, but Cinepak is still sometimes used for backwards compatibility. CMYK (Cyan Magenta Yellow Black) - color space commonly used for images that will be printed with 4-color ink on offset presses. Codec (Compressor/decompressor) - software component that translates video or audio between its uncompressed form and the compressed form in which it is stored. Sorenson Video and Cinepak are common QuickTime video codecs. Also called a compressor. Color Depth - possible range of colors that can be used in a movie or image. There are generally four choices with video: Grayscale, 8-bit, 16-bit, and 24-bit. Higher color depths provide a wider range of colors, but require more space for a given image size. Only Animation, None and PNG support multiple color depths. These codecs also support 1-bit, 2-bit and 4-bit video in both color and grayscale. Color Lookup Table - see Palette.