105
Glossary
A
ppe
ndix
base correction reduces deterioration
of picture quality when transmitting
or copying playback signals.
Threading
See “Loading.”
Timecode
A digitally encoded signal which is
recorded with video data to identify
each frame of the video by hour,
minute, second and frame number.
SMPTE time code is applied to
NTSC system, and EBU time code to
PAL and SECAM systems.
Unloading
When the EJECT button is pressed,
the VCR automatically winds the
tape back into the cassette case. Also
called “Unthreading.”
User bit data
A total of 32 bits are provided in the
time code which the user can use to
record such information as date, reel
number, or scene number on video
tape or disc. Also called user’s bits.
VBID (Video Blanking ID)
This is a video ID signal, defined in
the EIAJ CPR-1204 standard, which
is inserted into VBS video output to
enable the aspect ratio to be detected.
The ID signal is inserted into line 20,
VBI 283.
