Adtec Edje 4000, Руководство пользователя

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Encoder Glossary
Term Definition
AC-3 Audio compression standard adopted by ATSC and owned by Dolby.
ADC Analog to Digital Converter
ASCII American Standard Code for information Interchange
ASI Asynchronous Serial Interface. A standard DVB interface for a transport stream
ATM Asynchronous Transfer Mode
ATSC Advanced Television Systems Committee. Digital broadcasting standard developed in North America.
ATV Advanced television. North American standard for digital Broadcasting
BAT
Bouquet Association Table. This DVB table describes a set of services grouped together by a broadcaster
and sold as a single entity. It is always found on PID 0x0011.
BER BER - Bit Error Rate
B-frames Bi-directional predicted pictures, o pictures created from referenced to past and future pictures
Bitrate The rate at which a bit stream arrives at the input of a decoder
Block A set of 8x8 pixels used during Discrete Cosine Transformation (DCT).
Bouquet A set of services sold as a single entity
Broadcaster Someone who provides a sequence of scheduled events or programs to the viewer
CA
Conditional Access. This system allows service providers to control subscriber access to programs and
services via encryption.
CAT
Conditional Access Table. This table identifies EMM streams with a unique PID value. The CAT is always
found on PID 0x0001
CATV Community Access Television, otherwise known as Cable TV.
Channel A digital medium that stores or transports an MPEG-2 transport stream.
COFDM Coded Orthogonal Frequency-Division Modulation
Compression Reduction of the number of bits needed to represent an item of data
Conditional
Access
A system used to control viewer access to programming based on subscription.
CRC Cyclic Redundancy Check. This 32-bit field is used to verify the correctness of able data before decoding.
CVCT
Cable Virtual Channel Table. This ATSC table describes a set of one or more channels using a number or
name within a cable network. Information in the table includes major and minor numbers, carrier frequency,
short channel name, and information for navigation and tuning. This table is located on PID=0x01FFB.
D/A Digital to Analog Converter
DAVIC Digital Audio Visual Council
DBS Direct Broadcasting Satellite or system
DCT Discrete Cosine Transform. Temporal-to-frequency transform used during spatial encoding of MPEG video.
Decoding
Time Stamp This stamp is found in the PES packet header. It indicates the time at which a piece of audio or video will be
decoded
DigiTAG Digital Television Action Group
Downlink Communication link from satellite to earth
DTV
Digital Television. A general term used to describe television that has been digitalized. It can refer to
Standard-definition TV or High-definition TV.
DTS See Decoding Time Stamp
DVB
37 Appendix