X0400 Series Router Manual
OVERVIEW
Revision 1.4.4
Page - 5
1.2.
GLOSSARY
CCIR-601:
(This document now known as ITU-R601). An international standard for component digital
television from which was derived SMPTE 125M and EBU 3246-E standards. CCIR-601
defines the sampling systems, matrix values and filter characteristics for the Y, B-Y, R-Y and
RGB component digital television signals.
SERIAL DIGITAL:
Digital information that is transmitted in serial form. Often used informally to refer to
serial digital television signals.
4Fsc:
Four times sub-carrier sampling rate used in composite digital systems. In NTSC this is 14.3
MHz. In PAL this is 17.7 MHz.
4:2:2:
A commonly used term for a component digital video format. The details of the format are
specified in the CCIR-601 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.
SDI:
An abbreviation for
serial digital interface
, this acronym is most commonly used to refer to
Standard definition serial digital television video signals up to 540 Mb/s.
HDTV:
An abbreviation for
high definition television
, this acronym is most commonly used to refer to
High definition serial digital television video signals at 1.485 Gb/s.
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 fiber 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.
Summary of Contents for X0400 Series
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