User Guide

326 Glossary
transition The change from one video clip to another. This can be abrupt—one clip finishes
and the other one starts—or can involve digital effects such as fading the end of the first clip
into the beginning of the second clip.
trim To edit a video or audio clip to remove unwanted material from the beginning or end.
UDF (Universal Disc Format) Standard developed by the Optical Storage Technology
Association for creating discs that can be used in any computer or digital device.
USB (Universal Serial Bus) Standard for transmitting digital signals between various devices.
UYNV See UYVY.
UYVY FOURCC code for a YUV color format used by many video capture cards.
V422 See YUY2.
VBR encoding (Variable Bit-Rate Encoding) A method of encoding MPEG video streams by
allocating more bits to complex sections of video and fewer bits to less-complex sections.
This results in higher quality video than CBR encoding at the same overall bit rate, or the
same level of quality as CBR encoding at a lower overall bit rate. Compare with CBR
encoding.
VCD (Video-CD) Digital videodisc format that preceded DVD, VCD is based on MPEG-1 video
and audio compression and is especially popular in Asia. Video quality is similar to VHS
videotape, but audio quality is superior.
VCD volume Logical container for all the data on a VCD disc. The VCD volume contains
MPEGAV, SEGMENT, and VCD folders, as well as any data files and folders that the author
added to the disc. The VCD volume can be created on a PC, and the video files played with
a software player, before it is recorded onto a disc. See also DVD Volume.
video capture device Device that converts an analog video signal to digital data.
VIDEO_TS File directory on a DVD disc (or in a DVD Volume folder) where DVD-Video data
is stored. Compare with AUDIO_TS.
VOB file (Video Object File) Basic media file, containing video and audio, of the DVD-Video
format.