Videonics PTM-1 User Manual page 156

Glossary
Flying Erase
Heads
IR
JPEG
LTC
MPEG
NTSC
OSD
148
Standard erase heads are mounted along the tape path
in a VCR. A flying erase head is built into the video
head drum just ahead of the video heads. It makes it
possible to erase the video each helical scan at a time
resulting in clean video edits with no rainbow effect. It
is a requirement for high quality video editing.
I nfra R ed is one of several remote control protocols. It
is a one way protocol that allows a device to send com-
mand to the VCR. Because this is a one-way communi-
cation, the VCR cannot send tape location information
back. VCR's that offer this limited method of control
are suitable only as record decks.
J oint P hotographic E xperts G roup. This group defines
industry-wide standards for still images relative to
their use on computers. These standards affect the
way digitized images are formatted and compressed
when stored on computers.
L ogitudinal T ime C ode is an SMPTE-defined standard
for time code, normally recorded onto a linear audio
track of a VCR.
M otion P icture E xperts G roup. This group defines
industry-wide standards for video sequences relative
to their use on computers. These standards affect the
way digitized video is formatted and compressed when
stored on computers.
N ational T elevision S tandards C ommittee. A body that
defines television standards in the USA. NTSC is char-
acterized by each frame being composed of 525 hori-
zontal scanning lines per frame, occurring at 30 frames
per second. The format is used in North America, Cen-
tral America, Japan, and parts of South America. (Also
see PAL and SECAM .)
O n S creen D isplay. A feature available on some con-
sumer-level VCR's. When OSD is toggled ON, the VCR
displays its status information on the connected video
monitor.