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Posted: Sun, August 25, 2002
GlossaryBitrate: the rate at which digital information is presented or encoded. The higher the bitrate the higher the visual and audio quality, but the less material you can fit on a disc. PCM audio: uncompressed audio as used on CDs. Dolby AC3: an audio format that runs at very low bit-rates, but preserves the quality, allowing more, or higher bitrate video to fit on a disc. MPEG-2: file compression format used on DVD-Video. Angles: video may be shot from multiple camera angles, with the viewer deciding which viewpoint they want to take. This feature adds interactivity to videos. Elementary stream: separate video or audio files. Program stream: containing both audio and video files. Motion menus: menus with video backgrounds or animated buttons. Chapter: a point on a DVD that the viewer can instantly jump to, like a track on a CD. Regional coding: method of ensuring DVDs are only played in the one of 6 areas of the world for which they were designed. The coding isn't supported by the consumer DVD writers. |
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