NTSC The U.S. analog color television standard. The
NTSC The U.S. analog color television standard. The National Television Standards Committee devised a system that was backward-compatible with the RS-170 monochrome system. It has a field rate of 60 Hz and 525 lines. It has since been supplanted by the ATSC standards for high-definition digital television. PAL Phase Alternating Line, the color television standard used in most of Europe (France used SECAM). It has a field rate of 50 Hz and 625 lines. Plug-in A small software application that plugs into a web browser and renders file formats that are not supported by the browser. These include Flash vector graphics and streaming audio and video decompressors. Progressive scan A television frame is scanned top-to-bottom on one pass. QCIF Quarter-size CIF image format: 176 144 pixels for luminance and 88 72 pixels for chrominance. Rich Media A combination of audio, video, graphics, and text, in a synchronized and possibly interactive presentation. SIF The standard image format of MPEG-1 encoding: 352 240 pixels, 30 fps for NTSC; 352 288 pixels, 25 fps for PAL. Telecine A device used to transfer movie film to a television format where it can be stored on videotape. To match the film rate of 24 frames per second to television at 30 frames per second every fourth field is repeated, called the 3:2 sequence. Unicast A one-to-one stream from a media server to a client player. VC-9 The SMPTE standard for the video compression codec based on Windows Media 9 technology. Glossary 329
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