HD9690 Series HDTV Graticule Generator Manual
Page 1-4
Revision 1.5
OVERVIEW
This symbol is intended to alert the user to important operating instructions.
1.2.
GLOSSARY
4:2:2
A commonly used term for a component digital video format. The sampling details of high
definition component digital video are specified in the ITU-R BT.709 standard. The numerals
4:2:2 denote the ratio of the sampling frequencies of the luminance channel to the two colour
difference channels. For every four luminance samples, there are two samples of each colour
difference channel. These signals are commonly carried on a coax cable according to the
SMPTE ST 292-1 standard.
4:4:4
A commonly used term for a high resolution component digital video format. The numerals
4:4:4 denote the ratio of the sampling frequencies of the luminance channel to the two colour
difference channels. For every four luminance samples, there are four samples of each colour
difference channel. 4:4:4 sampled signals are also available in a RGB format with equal
sampling rates for each of the colour channels. These signals are commonly carried on a pair
of coax cables according to the SMPTE ST 372 standard.
AES:
(Audio Engineering Society):
A professional organization that recommends standards for
the audio industries.
AES/EBU:
Informal name for a digital audio standard established jointly by the Audio Engineering Society
and the European Broadcasting Union organizations.
ANALOG:
An adjective describing any signal that varies continuously as opposed to a digital signal that
contains discrete levels representing digits 0 and 1.
A-TO-D CONVERTER (ANALOG-TO-DIGITAL):
A circuit that uses digital sampling to convert an
analog signal into a digital representation of that signal.
BIT
:
A binary representation of 0 or 1. One of the quantized levels of a pixel.
BIT PARALLEL:
Byte-wise transmission of digital video down a multi-conductor cable where each
pair of wires carries a single bit. This standard is covered under SMPTE 125M, EBU 3267-E
and CCIR 656.
BIT SERIAL:
Bit-wise transmission of digital video down a single conductor such as coaxial cable. May
also be sent through fibre optics. This standard is covered under SMPTE 259M and CCIR 656.
BIT STREAM:
A continuous series of bits transmitted on a line.
BYTE:
A complete set of quantized levels containing all the bits. Bytes consisting of 8 to 10 bits per
sample are typical in digital video systems.
CABLE EQUALIZATION:
The process of altering the frequency response of a video amplifier to
compensate for high frequency losses in coaxial cable.
CCIR (International Radio Consultative Committee):
An international standards committee. (This
organization is now known as the ITU.)