Autodesk 64006-051108-9001 User Guide - Page 261

253 Color Space - mathematical model that describes colors. Common models include RGB, CMYK, HSV and Y'CbCr. Color Subsampling - method of reducing the size of an image by storing color data with lower resolution than luminance data. Typically used in video with the Y'CbCr color space. Common subsampling options include 4:2:2, 4:1:1, and YUV9. Compression - Digital compression reduces the overall number of bits in a file so it can be transmitted faster over Internet connections, or take up less space on a disk. Audio compression boosts the volume of quiet parts of the audio, while limiting loud parts. Compressor - see Codec. CPU (Central Processing Unit) - processor chip in a computer. Also used to refer to a computer in general. CPU-Intensive - describes processes that use large amounts of processor power. CPUintensive processes tend to tie up the computer while they are running, and not work well on slower computers. D1 Resolution - standard resolution specified by certain formats, including DV, which is 720x486. Also known as CCIR601. Data Rate - amount of information per second used to represent a movie, often expressed in KiloBytes per second (KBytes/sec). A single speed CD-ROM movie is usually made at a data rate of 100 KBytes/sec and a double speed CD-ROM movie about 200 KBytes/sec. The data rate of uncompressed NTSC video is about 15 MBytes/sec. Data Rate Limiting - ability of a program or codec to control the size of the final compressed movie so that it meets the specified data rate. See also Variable Bitrate Encoding.