1、 STD-ITU-T RECMN JOB1 CORR= 1-ENGL 179b m qBb2571 Ob272L 3b0 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU J.81 Corrigendum I (1 0/96) SERIES J: TRANSMISSION OF SOUND-PROGRAMME AND TELEVISION SIGNALS Digital transmission of television signals Transmissi
2、on of component-coded digital television signals for contribution-quality applications at the third hierarchical level of ITU-T Recommendation G.702 Corrigendum I ITU-T Recommendation J.81 - Corrigendum I (Previously CClTT Recommendation) STD=ITU-T RECMN J-81 CORR= 1-ENGL 179b q8b259L Ob29219 2T7 IT
3、U-T J-SERIES RECOMMENDATIONS TRANSMISSION OF SOUND-PROGRAMME AND TELEVISION SIGNALS General Recommendations J. 1-J.9 General Recommendations concerning sound-programme transmissions J. 10-J.19 Performance characteristics of sound-programme circuits 5.20-5.29 Characteristics of equipment and lines us
4、ed for setting up sound-programme circuits Characteristics of equipment for coding analogue sound-programme signais Digital transmission of sound-programme signals Characteristics of circuits for television transmissions J.30-J.39 5.40-5.49 J.50-J.59 5.60-5.69 Systems for television transmission ove
5、r metallic lines and interconnection with radio- 5.70-5.79 relay links Specific Recommendations for television transmission Transmission of signals with multiplexing of video, sound and data, and signals of new systems Interactive services J.90-J.99 J.100-J.109 J. 1 10-J. 1 19 For firrther details,
6、please refer to ITU-T List of Recommendations. STD-ITU-T RECMN JOB1 CORR- 1-ENGL 177b LiBb2571 Ob27220 TL9 FOREWORD The ITU-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (ITU). The IT-T is responsible for studying technical, operating
7、and tariff questions and issuing Recommen- dations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their tur
8、n, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, March 1-12, 1993). Corrigendum 1 to ITU-T Recommendation 5.81 was prepared by ITU-T Study Group 9 (1993-1996) and was appr
9、oved by the WTSC (Geneva, 9-18 October 1996). NOTE in this Corrigendum, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O ITU 1997 All rights reserved. No part of this publication may be reproduced or util
10、ized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. Recommendation J.81Kor.l (lOl96) 1 STD-ITU-T RECMN J*BL CORR= 1-ENGL 179b Bb259L Ob29221 955 = CONTENTS 11 Page 24. subclause A.8.1.2 . Page 25, subclause A.8
11、1.3 . Page 26, subclause A.8.1.3 . Page 26, subclause A.8.1.3 . Page 31, subclause A.9.2.4 . Page 39, Table A.14 . Page 42, subclause A.ll. 1 Page 42, subclause A.11.2 Page 41, Figure A.23 Page 24, subclause A.8.1.2 . Page 33, subclause A.9.3.4 . Page 45, Figure A.22 Recommendation J.8UCor.l (10/96
12、) Page 1 1 1 2 2 2 2 2 2 2 2 3 STD=ITU-T RECMN J*BL CORR- 1-ENGL L77b 4Bb257L Ob27222 871 Corrigendum 1 to Recommendation 5.81 TRANSMISSION OF COMPONENT-CODED DIGITAL TELEVISION SIGNALS FOR CONTRIBUTION-QUALITY APPLICATIONS AT THE THIRD HIERARCHICAL LEVEL OF ITU-T RECOMMENDATION G.702 (Geneva, 1996)
13、 The following modifications to the version of Recommendation J.81 are intended to correct some editorial errors found in the Recommendation and to clariQ some points in order to avoid ambiguous interpretation. CO Correction CL Clarification 1) Page 24, subclause A.8.1.2 In subsection Sni replace: “
14、even field” by “first field” (twice) and “odd field” by “second field” (twice). 2) Page 24, subclause A.8.1.2 In subsection CRCb delete: “cluding SSW (applies to English version only) and add the following: “The CRC calculation registers are initialized to zero before the start of each stripe.” 3) P
15、age 25, subclause A.8.1.3 In subsection FS, add a new column “VA” and note as follows: Field sequence Frame Field VA O00 1 1 1 O0 1 1 2 1 O10 2 3 O o1 1 2 4 O 1 1 O 111 4 8 O “NOTE - This table applies for PAL and SECAM. The VA information is applicable for PAL only.” CO CO, CL CL Recommendation J.8
16、1/Cor.l (10/96) 1 STD-ITU-T RECMN J.81 CORR. 1-ENGL 177b q8b2571 Ob27223 728 4) Page 26, subclause A.8.1.3 In subsection BA, read as follows: “The peak to peak amplitude of the subcarrier burst .7 5) Page 26, subclause A.8.1.3 In subsection SCP, read as follows: “Instantaneous phase of the reference
17、 subcarrier .7 6) Page 31, subclause A.9.2.4 First paragraph, add the following: “. provided by bit s of the container. In ail packets LSB (bit O) is sent first.” 7) Page 33, subclause A.9.3.4 Add the following: bb . are shown in Table A. 12. The fist bit after the run-in sequence is MSB of the firs
18、t octet of the data field.” 8) Page 39, Table A.14 Frame number 3, column m3, read as follows: “1” if A-channel is 1544 kbi/s (Note 3) 9) Page 42, subclause A.ll.l Top of Page, read as follows: “The initial value at the beginning of the first fiame is: LSB MSB l I 001 1 11 1 o1 and is updated twice
19、every fiame.” 10) Page 42, subclause A.11.2 Subsection K, modi3 as follows: “K (6 bit) indicates K = 11 11 11 for frames 14,29,44, etc.; K = O00000 for all other fiames.” . between O and 45: 11) Page 45, Figure A.22 Read the title as follows: “Scheme of decoder” (applies to English version only) CL
20、CL CL CL CO CO CO CO 2 Recommendation J.Sl/Cor.l (10196) STDmITU-T RECMN J.AL CORR- 1-ENGL 197b = 4Bb2571 0b2922Li bbll 12) Page 47, Figure A.23 Remove line below RS as shown: CO Recommendation J.%l/Cor.l (10/96) 3 STDnITU-T RECMN JO81 CORR- 1-ENGL L99b Li8b2591 Ob29225 5T0 Series A Series B Series
21、C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Z ITU-T RECOMMENDATIONS SERIES Organization of the work of the ITU-T Means of expression General telecommunicat
22、ion statistics General tariff principles Telephone network and ISDN Non-telephone telecommunication services Transmission systems and media Transmission of non-telephone signals Integrated services digital network Transmission of sound-programme and television signals Protection against interference
23、 Construction, installation and protection of cables and other elements of outside plant Maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound-programme and television transmission circuits Specifications of me
24、asuring equipment Telephone transmission quality Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminal equipments and protocols for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communication Programming languages Printed in Switzerland Geneva, 1997
