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EIA 608 隐藏字幕标准.pdf
EIA
Line 21 Data Services
FOR EIA USE ONLY
EIA
STANDARD
Line 21 Data Services
B
-
8
0
6
-
A
E
C
A
I
E
/
EIA/CEA-608-B
(Revision of EIA-608-A)
OCTOBER 2000
ELECTRONIC INDUSTRIES ALLIANCE
NOTICE
between manufacturers
EIA Engineering Standards and Publications are designed to serve the public interest through
eliminating misunderstandings
facilitating
interchangeability and improvement of products, and assisting the purchaser in selecting and
obtaining with minimum delay the proper product for his particular need. Existence of such
Standards and Publications shall not in any respect preclude any member or nonmember of EIA
from manufacturing or selling products not conforming to such Standards and Publications, nor
shall the existence of such Standards and Publications preclude their voluntary use by those other
than EIA members, whether the standard is to be used either domestically or internationally.
and
purchasers,
Standards and Publications are adopted by EIA in accordance with the American National
Standards Institute (ANSI) patent policy. By such action, EIA does not assume any liability to any
patent owner, nor does it assume any obligation whatever to parties adopting the Standard or
Publication.
Note: The user's attention is called to the possibility that compliance with this standard may
require use of an invention covered by patent rights.
By publication of this standard, no position is taken with respect to the validity of this claim or of
any patent rights in connection therewith. The patent holder has, however, filed a statement of
willingness to grant a license under these rights on reasonable and nondiscriminatory terms and
conditions to applicants desiring to obtain such a license. Details may be obtained from the
publisher.
This EIA Standard is considered to have International Standardization implication, but the
International Electrotechnical Commission activity has not progressed to the point where a valid
comparison between the EIA Standard and the IEC document can be made.
This Standard does not purport to address all safety problems associated with its use or all
applicable regulatory requirements. It is the responsibility of the user of this Standard to establish
appropriate safety and health practices and to determine the applicability of regulatory limitations
before its use.
(From Project Number. 4911, formulated under the cognizance of the R-4.3 Television Data
Systems Subcommittee.)
Published by
ELECTRONIC INDUSTRIES ALLIANCE 2000
Technology Strategy & Standards Department
2500 Wilson Boulevard
Arlington, VA 22201
Catalog of EIA Electronic Industries Alliance Standards and Engineering Publications
or call Global Engineering Documents, USA and Canada (1-800-854-7179)
PRICE: Please refer to the current
International (303-397-7956)
All rights reserved
Printed in U.S.A.
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EIA/CEA-608-B
FOREWORD
This standard was developed under the auspices of the Consumer Electronics Association (CEA, formerly
CEMA) Technology & Standards R4.3 Television Data Systems Subcommittee. EIA-608-A was accepted as
an EIA standard on September 21, 1999.
Extended Data Services (XDS) are additional services provided in Line 21 Field 2 data. New services may
have been standardized by CEA since the publication of this standard. No attempt is made to list XDS
Private Data Services, although it is requested that users of such services notify CEA of Private Data packet
assignments. XDS services, whether Private Data or not, may not be meant for transmission to the
television receiver.
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EIA/CEA-608-B
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ii
EIA/CEA-608-B
CONTENTS
1 Purpose and Scope........................................................................................................................ 1
1.1 Purpose ................................................................................................................................ 1
1.2 Scope................................................................................................................................... 1
1.3 Other Vertical Interval Lines................................................................................................ 1
1.4 Antecedent Documents........................................................................................................ 1
2 References..................................................................................................................................... 1
2.1 Normative References.......................................................................................................... 1
2.2 Regulatory References......................................................................................................... 2
2.3 Antecedent References........................................................................................................ 2
2.4 Reference Acquisition.......................................................................................................... 2
3 Definitions...................................................................................................................................... 3
3.1 Definitions............................................................................................................................ 3
3.2 Terms Employed.................................................................................................................. 3
3.2.1 Acronyms................................................................................................................... 3
3.2.2 Glossary (Informative)................................................................................................ 3
3.3 Compliance notation............................................................................................................ 6
4 Background (Informative)............................................................................................................... 6
4.1 Data Types in the Line 21 Signal ......................................................................................... 6
4.2 Program Distribution Paths.................................................................................................. 8
5 Signal Characteristics.................................................................................................................. 10
5.1 Introduction........................................................................................................................ 10
5.2 Line 21 Waveform.............................................................................................................. 10
5.3 Data Formats...................................................................................................................... 14
6 Closed Captioning........................................................................................................................ 14
6.1 Introduction........................................................................................................................ 14
6.2 Background and Foreground Attributes............................................................................. 14
6.3 Closed-Group Extensions (Informative)............................................................................. 16
6.4 Character Sets (Normative)................................................................................................ 17
6.4.1 Standard .................................................................................................................. 17
6.4.2 Optional Extended Characters................................................................................. 17
7 Text Mode .................................................................................................................................... 24
7.1 Introduction........................................................................................................................ 24
7.2 Text Mode Service Providers and Equipment Manufacturers ............................................ 24
7.3 Field 2 Text Bandwidth Considerations ............................................................................. 25
7.4 Real-Time Scrolling Display............................................................................................... 25
7.5 Other Real-Time Display Methods...................................................................................... 25
7.6 Delayed Display................................................................................................................. 26
7.7 Other Interruptions............................................................................................................. 26
7.8 Automatic Erasure of Text and Background....................................................................... 26
7.9 Data Channel Nomenclature for Text Services.................................................................. 26
7.10 Transmitting URLs in T-2 .................................................................................................. 26
7.11 Character Set................................................................................................................... 27
7.12 Standard Syntax .............................................................................................................. 27
7.13 Special Characters........................................................................................................... 29
7.14 Bandwidth Considerations ............................................................................................... 29
8 Field 2 Formats and Protocols..................................................................................................... 29
8.1 Introduction........................................................................................................................ 29
8.2 Signal Characteristics........................................................................................................ 30
8.3 Data Formats...................................................................................................................... 30
8.4 Closed Caption Mode ......................................................................................................... 30
iii
EIA/CEA-608-B
8.5 Text Mode .......................................................................................................................... 30
8.6 Extended Data Services Mode ........................................................................................... 31
8.6.1 Extended Data Characters ....................................................................................... 31
8.6.2 Control Codes.......................................................................................................... 31
8.6.3 Checksum ................................................................................................................ 32
8.6.4 Interleave Service Example..................................................................................... 32
8.6.5 Multiple Interleave ................................................................................................... 33
8.6.6 Packet Length.......................................................................................................... 33
8.6.7 Packet Suspension................................................................................................... 33
8.6.8 Packet Termination.................................................................................................. 34
9 eXtended Data Service (XDS) Packets......................................................................................... 34
9.1 Introduction........................................................................................................................ 34
9.2 General Use ....................................................................................................................... 34
9.3 Extended Data Packet Control Codes................................................................................ 35
9.4 Class Definitions................................................................................................................. 35
9.5 Type Definitions................................................................................................................. 36
9.5.1 Current Class............................................................................................................ 36
9.5.1.1 01h Program Identification Number ............................................................... 36
9.5.1.2 02h Length/Time-in-Show .............................................................................. 36
9.5.1.3 03h Program Name (Title) .............................................................................. 37
9.5.1.4 04h Program Type .......................................................................................... 37
9.5.1.5 05h Content Advisory...................................................................................... 39
9.5.1.5.1 U.S. TV Parental Guideline Rating System .......................................... 40
9.5.1.5.2 Canadian English Language Rating System ........................................ 41
9.5.1.5.3 Système de classification français du Canada ..................................... 42
9.5.1.5.4 General Content Advisory Requirements ............................................. 43
9.5.1.6 06h Audio Services......................................................................................... 43
9.5.1.7 07h Caption Services...................................................................................... 44
9.5.1.8 08h Copy Generation Management System (Analog) ..................................... 45
9.5.1.9 09h Aspect Ratio Information ......................................................................... 46
9.5.1.10 0Ch Composite Packet-1............................................................................... 47
9.5.1.11 0Dh Composite Packet-2............................................................................... 48
9.5.1.11 10h to 17h Program Description Row 1 to Row 8.......................................... 48
9.5.1.12 Future Programming .................................................................................... 49
9.5.1.12.1 Future Class Packets 0x01 through 0x3F ............................................ 49
9.5.1.12.2 PSIP Class Packets 0x50 through 0x6F............................................... 49
9.5.1.12.3 0x50 Minor Channel Number.............................................................. 49
9.5.1.12.4 0x51 Event Number............................................................................. 49
9.5.1.12.5 0x52 Event Start Time......................................................................... 49
9.5.1.12.6 0x53 Event Duration............................................................................ 50
9.5.1.12.7 0x54 Program Title ............................................................................. 50
9.5.1.12.8 0x55 Program Type ............................................................................ 50
9.5.1.12.9 0x56 Content Advisory ........................................................................ 51
9.5.1.12.10 0x57 Audio Services......................................................................... 51
9.5.1.12.11 58h (0x58) Caption Services.............................................................. 52
9.5.1.12.12 60h Multiple String Structure Control................................................ 52
9.5.1.12.13 61h EIT Descriptor Information.......................................................... 53
9.5.1.12.14 62h-6Eh Reserved ............................................................................. 53
9.5.1.12.15 6Fh Data Carriage Packet................................................................. 53
9.5.2 Channel Information Class....................................................................................... 54
9.5.2.1 01h Network Name (Affiliation)....................................................................... 54
9.5.2.2 02h Call Letters (Station ID) and Native Channel............................................ 54
9.5.2.3 03h Tape Delay .............................................................................................. 54
9.5.2.4 04h Transmission Signal Identifier (TSID)....................................................... 54
9.5.3 Miscellaneous.......................................................................................................... 55
iv
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