Model 5600MSC Master Clock/SPG Manual
OVERVIEW
Revision 1.6
Page
1-7
used in both parallel and serial interfaces. It reflects definitions found in EBU Tech 3267
(for 625 line systems) and SMPTE 125M (parallel 525 line systems) and SMPTE 259M
(serial 525 line systems). This document was formerly known as CCIR-656.
LTC:
Linear Time Code or Longitudinal Time Code. This time and address control signal
standardized by SMPTE 12M has been in widespread use in the professional video and
audio industries since 1975. It is typically written on a time code or address track of a
video recorder and provides an individual frame number for each video frame recorded.
LTC is also commonly used to distribute time of day information to wall clocks,
automation systems and other devices throughout a television facility. In regions of the
world using the NTSC or similar non-integer (1/1.001) frame rates, LTC locked to the
video frame rate does not maintain accurate time and must be corrected regularly when
it is used convey time of day information. (See
DROP FRAME
)
NTP:
The public domain software package called NTP (Network Time Protocol) is an
implementation of the TCP/IP network protocol with the same name. NTP is now widely
used around the world to achieve a high accuracy time synchronization for computers
across a network. The protocol supports an accuracy of time down to nanoseconds
however; the real accuracy that can be achieved also depends on the operating system
and the network performance.
PIXEL:
The smallest distinguishable and resolvable area in a video image. A single point on the
screen. In digital video, a single sample of the picture. Derived from the words
picture
element
.
RESOLUTION:
The number of bits (four, eight, ten, etc.) determines the resolution of the signal.
Eight bits is the minimum resolution for broadcast television signals.
4 bits = a resolution of 1 in 16.
8 bits = a resolution of 1 in 256.
10 bits = a resolution of 1 in 1024.
RP 168:
The SMPTE Recommended Practice for the definition of the vertical interval switching
point for synchronous video switching. This recommended practice also defines a
default alignment between standard definition and high definition synchronizing pulse
signals.
RP 188:
The SMPTE Recommended Practice for transmitting Time code in the ancillary data
space of serial digital television signals.
SERIAL DIGITAL (SDI):
Serial Digital Interface a standardized interface for transmitting digital
television signals using a coaxial cable in serial form. Often used informally to refer to
the 4:2:2 sampled standard definition serial digital television signals as specified in
SMPTE 259M.
SMPTE (Society of Motion Picture and Television Engineers):
A professional organization that
recommends standards for the film and television industries.
USO
RESTRITO
