User Guide

314 Glossary
ASCII (American Standard Code for Information Interchange) Code standard for
representing alphanumeric information.
ATIYUY2 See YUY2.
AUDIO_TS File directory on a DVD disc (or in a DVD Volume folder) where DVD-Audio data
is stored. In a DVD-Video disc, this directory is always empty, though the DVD specification
requires that it exist. Compare with VIDEO_TS.
authoring The processes in which encoded audio and video files are linked, subtitles
imported, chapter points and transport control functions introduced, and menus and
buttons designed.
Authoring Media Recordable DVD disc that is designed for use in professional DVD
recorders. Authoring discs let the DVD author write encrypted DVD files to the disc.
Compare with General Media.
AVI (Audio Video Interleave) File format for digital video and audio data that is defined by
Microsoft Corporation. Files have the extension .avi.
B-picture (Bi-Directionally Predictively Coded Picture) MPEG video picture that contains
only the information that is different from previous and subsequent frames or fields. See also
GOP, I-picture, P-picture.
bit Binary digit. The smallest unit of digital information. Eight bits make one byte.
bit depth Number of bits used to represent the color and brightness of each pixel in a
bitmap image, expressed in bits per pixel. A 1-bit image has two (2
1
) colors (black and
white), a 2-bit image has four (2
2
) colors, and so on. Full-color images are 24 or 32 bits per
pixel; 24-bit images can contain 16,777,216 (2
24
) colors, whereas 32-bit images can contain
4,294,967,296 (2
32
) colors. Also known as color depth.
bit rate Quantity of data measured in bits over a period of time (usually, one second).
Equivalent to data rate.
bitmap Digital image that is represented by a two-dimensional grid of pixels. There are many
bitmap file formats, including Windows bitmap, JPEG, and TIFF.
bps (Bits per Second) Unit of measurement for data rates.