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HD9084 HDTV Caption Encoder Manual
Page 7-2 GLOSSARY
SMPTE 309M: The SMPTE standard for encoding date information into the user bits of linear time
code.
SMPTE 333M: The SMPTE standard for serially interfacing captioning equipment with ATSC caption
encoders.
SMPTE 334M: Assigns addresses to be used to multiplex specific data services such as captioning
into the vertical ancillary (VANC) space defined by 291M. It also specifies that the
payload of a VANC packet used for captioning is CDP. Supeceded by SMPTE-334-1
and SMPTE-334-2.
SMPTE 334-1: Vertical Ancillary Data Mapping of Caption Data and Other Related Data.
SMPTE 334-2: Caption Distribution Packet (CDP) Definition.
SMPTE 425M: Specifies the mapping of different video signals to the 3G physical interface, as well as
the supported video formats.
SMPTE RP2007: CDP and “Grand Alliance” serial communication interfaces.
7.2. GLOSSARY OF TERMS
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.
ATSC A/65: Defines information that describes the contents of an ATSC broadcast. Some of this
information may pertain to the closed captioning.
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-
C and CCIR 656.
BIT STREAM: A continuous series of bits transmitted on a line.
BNC: Abbreviation of "baby N connector". A cable connector used extensively in television
systems.
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