1、 - STDmITU-T RECNN JO81 AND 2-ENGL 1998 = 4862591 Ob495b2 TI7 INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECT0 R OF ITU J.81 Amendment 2 (03198) SERIES J: TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Digital transmission of television si
2、gnals Transmission of component-codec digital television signals for contribution-quality applications at the third hierarchical level of ITU-T Recommendation G.702 Amendment 2: Appendix IV to Annex A - Results of 34 Mbit/s codec interworking tests (February 1996) ITU-T Recommendation J.81 - Amendme
3、nt 2 (Previously CCITT Recommendation) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesSTDeITU-T RECMN Ja81 AMD 2-ENGL 1998 W 48b2591 Ob49563 953 W ITU-T J-SERIES RECOMMENDATIONS TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MUL
4、TIMEDIA SIGNALS General Recommendations General specifications for analogue sound-programme transmission Performance Characteristics of analogue sound-programme circuits Equipment and lines used for analogue sound-programme circuits Digital encoders for analogue sound-programme signals Digital trans
5、mission of sound-programme signals Circuits for analogue television transmission Analogue television transmission over metallic lines and interconnection with radio-relay links J.l-J.9 . J. 1 O-J. 19 J.20-J.29 5.3 0-5.39 J.40-J.49 J.50-J.59 5.60-5.69 5.70-5.79 Digital transmisgion of television sign
6、ais 5.80489 Ancillary digital services for television transmission Operational requirements and methods for television transmission Interactive systems for digital television distribution Transport of MPEG-2 signals on packetised networks Measurement of the quality of service Digital television dist
7、ribution through local subscriber networks J.90-J.99 J. 100-J. 109 J.110-5.129 5.130-5.139 J. 140-5.149 5.150-5.159 For further detaiIs, please refer io ITU-T List of Recommendations. COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesITU-
8、T RECOMMENDATION J.81 TRANSMISSION OF COMPONENT-CODED DIGITAL TELEVISION SIGNALS FOR CONTRIBUTION-QUALITY APPLICATIONS AT THE THIRD HIERARCHICAL LEVEL OF ITU-T RECOMMENDATION G.702 AMENDMENT 2 APPENDIX IV (to Annex A of Recommendation 5.8 1) Results of 34 Mbit/s codec interworking tests (February 19
9、96) Source Amendment 2, Appendix IV to Annex A of ITU-T Recommendation 5.8 1, was prepared by ITU-T Study Group 9 (1997- 2000) and was approved under the WTSC Resolution No. 1 procedure on the 18th of March 1998. Recommendation ITU-T J.lllamd.2 (03/98) 1 COPYRIGHT International Telecommunications Un
10、ion/ITU TelecommunicationsLicensed by Information Handling ServicesSTD-ITU-T RECNN JOB1 AND 2-ENGL 2998 48b259L 0b495b5 72b FOREWORD IT (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommuni- cations. The ITU Telecommunication Standardization Sec
11、tor (IT-T) is a permanent organ of the IT. The IT-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which mee
12、ts every four years, establishes the topics for study by the IT-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the IT-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information techno
13、logy which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE I in this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLE
14、CTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The IT takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Right
15、s, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the IT had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implement
16、ors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. I O ITU 1998 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photo
17、copying and microfilm, without permission in writing from the IT. 11 Recommendation ITU-T J.8Uamd.2 (03/98) COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesSTD-ITU-T RECMN JO81 AMD Z-ENGL 3998 4862593 0649566 662 Introduction The follow
18、ing new Appendix IV to Annex A is added to Recommendation J.81. It is recalled that Amendment 1 to Recommendation 1.81 added a new Appendix II to Annex A which required renumbering the existing Appendix II as Appendix III at that time. . Recommendation ITU-T J.8Vamd.2 (03/98) 111 - COPYRIGHT Interna
19、tional Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesRecommendation 5.81 TRANSMISSION OF COMPONENT-CODED DIGITAL TELEVISION SIGNALS FOR CONTRIBUTION-QUALITY APPLICATIONS AT THE THIRD HIERARCHICAL LEVEL OF ITU-T RECOMMENDATION G.702 . AMENDMENT 2 APPENDIX IV
20、(to Annex A of Recommendation 5.81) Results of 34 Mbit/s codec interworking tests (February 1996) (Geneva, I998) Correct interworking of four manufacturers codecs was achieved in February 1996, after nearly three years of cooperation between the manufacturers and the EBU. This included correct inter
21、working of the composite analogue interfaces, as specified by the EBU, (see Appendix II above). I The test procedure used for the interworking verification consisted of subjective quality evaluation by expert viewers on a selection of EBU/ITU test sequences, and of objective measurements on analogue
22、 audio and video. Tables A.IV.l and A.IV.2 below summarize the interworking test results for video and audio respectively. A more comprehensive description of the interworking tests is available in the EBU Technical Review No. 269 i. At the time of the tests, one manufacturer had not yet implemented
23、 SECAM interfaces or ITS and IDS transmission, but in all other respects correct interworking was achieved. The combination “encoder (No. 2) - decoder (No. 1)“ gave an alarm signal inversion for the absence of the 34 Mbi/s signal at the input to the decoder. This was the only remaining anomaly in Fe
24、bruary 1996 and this minor problem was subsequently corrected. Recovery times, after an interruption of the encoder video input signal, and after an interruption of the decoder 34 Mbits input signal, were satisfactory for all combinations of encoder-decoder, namely 0.5 s and 2 s respectively. Audioi
25、video delay differential was also satisfactory for all combinations of encoder-decoder, namely 2 ms. All encoders utilize comb-filters to decode PAL and NTSC respectively, thereby obtaining clean component signals, virtually free from luminanceichrominance crosstalk. Subjective evaluation, carried o
26、ut in accordance with ITU-R Recommendation BT.500-7, of one generation and three generations of 34 Mbit/s (Recommendation 5.8 1) coding, using ITLJ-R BT.60 1-5 interconnections between codecs, gave scores of 4.5 and 4 respectively, on the 1 to 5 scale for picture quality. Audio transmission, using I
27、TU-T 5.57 coding, was transparent. Recommendation ITU-T J.Wamd.2 (03/98) 1 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services STD-ITU-T RECMN J.81 AND 2-ENGL 1998 48b2591 Ob49568 435 Table A.IV.l/J.Sl- 34 Mbit/s encoder/decoder interworki
28、ng video test results - February 1996 EncoderNo. 1 Encoder No. 2 Encoder No. 3 Encoder No. 4 Decoder No. 1 :xt. IDSITS: OK nt. IDSATS: OK krambling (mode I): IK ideo: OK 4udio: OK Ext. IDSATS: OK int. IDSIITS: OK Scrambling (mode I): OK Video: OK but “34 M absent“ alarm Audio: OK Ext. IDS/ITS: OK In
29、t. IDSATS: OK Scrambling (mode I): OK Video: OK Audio: OK Ext. ITS: OK No Int. ITS No Int./Ext. IDS Scrambling (mode I): OK Video: No SECAM decoder available in No. 4 encoder Audio: OK Decoder No. 2 txt. IDSATS: OK nt. IDSATS: OK krambling (mode 1): )K Jideo: OK iudio: OK 3xt. IDSATS: OK :nt. IDSATS
30、: OK Scrambling (mode I): 3K Video: OK Audio: OK Ext. IDSflTS: OK int. IDSATS: OK Scrambling (mode 1): OK Video: OK Audio: OK Ext. ITS: OK No Int. ITS No Int./Ext. IDS Scrambling (mode I): OK Video: No SECAM decoder available in No. 4 encoder Audio: OK Decoder No. 3 Ext. IDSATS: OK Int. IDCATS: OK k
31、rambling (mode I): )K Jideo: OK hdio: OK 3xt. IDSATS: OK nt. IDSATS: OK Scrambling (mode I): 3K Video: OK Audio: OK Ext. IDSATS: OK Int. IDS/ITS: OK Scrambling (mode i): OK Video: OK Audio: OK Ext.ITS: Intermittent No Int. ITS No Int./Ext. IDS Scrambling (mode i): OK Video: No SECAM decoder availabl
32、e in No. 4 encoder Audio: OK Decoder No. 4 Zxt. IDSIITS: OK :nt. IDS/ITS: OK io IntJExt. IDS Scrambling (mode I): OK Video: OK but no SECAM coder available in No. 4 decoder Audio: OK Ext. ITS: OK No Int. ITS No IntlExt IDS Scrambling (mode I): OK Video: OK but no SECAM coder available in No. 4 decod
33、er Audio: OK Ext. ITS: intermittent in regular sequence No Int. ITS Scrambling (mode 1): OK Video: OK but no SECAM coder available in No. 4 decoder Audio: OK Ext.ITS: OK No Int. ITS No Int./Ext. IDS Scrambling (mode I): OK Video: OK but no SECAM available in No. 4 encoder o decoder Audio: OK NOTE -
34、Encoders and decoders No. 4 were manufactured by a combination of two companies who now supply the equipment a two separate manufacturers. Both manufacturers have subsequently implemented ITS and IDS transmission. 2 Recommendation ITU-T J.Wamd.2 (03198) - COPYRIGHT International Telecommunications U
35、nion/ITU TelecommunicationsLicensed by Information Handling ServicesSTD-ITU-T RECMN Je81 AMD 2-ENGL 1998 = 48b2591 Ob49569 371 = Table A.IV.ZJ.81- 34 Mbitls encodeddecoder interworking video test results - February 1996 EncoderNo. I Encoder No. 2 Encoder No. 3 Encoder No. 4 Decoder No. 1 :requencyla
36、ttenuation 10HZ-15kHz:fO.I dB 1020 Hd+9 dBm THD : 0.1% 50 Hd+9 dBM THD : 0.1% X-talk: 79.8 dB S/N (wtd): 73.3 dB . Frequencylattenuation 40 Hz-1 5 Hz: f 0.1 dB 1020 Hd+9 dBm THD 0.1% 60 Hd+9 dBm THD 0.1% X-talk: 78.5 dB SM (wtd): 73.6 dB Frequencylattenuation 1020 Hd+9 dBm THD 0.1% 60 Hd+9 dBm THD 0
37、.1% X-talk: 8 1.5 dB S/N (wtd): 76.6 dB Frequencylattenuation 40 Hz-15 Hz: IO.l dB 1020 Hd+9 dBm THD 0.1% 60 Hd+9 dBm THD 0.1% X-talk: 78.6 dB SM (wtd): 68.1 dB 40 Hz-15 Hz: fO.l dB Decoder No. 2 Frequencylattenuation 40 Hz-15 Hz: 1: 0.1 dB I 020 Hd+9 dBm THD 0.1% 60 Hd+9 dBM THD 0.1% X-talk 76.8 dB
38、 SN (wtd): 75.8 dB Frequencylattenuation 40 Hz-15 Hz: k 0.1 dB 1020 Hd+9 dBm THD 0.1% 60 Hd+9 dBm THD 0.1% X-talk: 82.9 dB SM (wtd): 74.6 dB Frequencylattenuation 40 Hz-15 Hz: fO.l dB I 020 Hd+9 dBm THD 0.1% 60 Hd+9 dBm THD 0.1% X-talk: 85.8 dB S/N(wtd): 81.8dB Frequencylattenuation 40 Hz-15 Hz: fO.
39、l dB 1 O20 Hd+9 dBm THD 0.1% 60 Hd+9 dBm THD 0.1% X-talk: 84.5 dB SM (wtd): 70.5 dB Decoder No. 3 Frequencylattenuation 40 Hz-15 Hz: tO.l dB 1020 Hd+9 dBm THD 0.1% 60 Hd+9 dBM THD 0.1% X-talk: 77.6 dB SN (wtd): 75.4 dB Frequencylattenuation 40 Hz-15 Hz: fO.1 dB 1020 Hd+9 dBm THD 0.1% 60 Hd+9 dBm THD
40、 0.1% X-talk: 79.6 dB SM (wtd): 78.3 dB Frequencylattenuation 40 Hz-1 5 Hz: I O. 1 dB 1020 Hd+9 dBm THD 0.1% 60 Hd+9 dBm THD 0.1% X-talk: 84.5 dB SIN (wtd): 82.5 dB Frequencylattenuation 40 Hz-15 Hz: 50.1 dE 1020 Hd+9 dBm THD 0.1% 60 Hd+9 dBm THD 0.1% X-talk: 81.6 dB SIN (wtd): 73.1 dB Decoder No. 4
41、 :requencyiattenuation 10 Hz-1 5 Hz: f O. 1 dB ,020 Hd+9 dBm THD : 0.1% 50 Hd+9 dBM THD : 0.1% Y-talk 83.0 dB SIN (wtd): 74.3 dB Frequencylattenuation 10 Hz-15 Hz: fO.l dB 1020 HA+9 dBm THD c 0.1% 60 Hd+9 dBm THD 0.1% X-talk: 77.1 dB SM (wtd): 71.2 dB Frequencylattenuation 40 Hz- 15 kHz: f O. I dB 1
42、020 Hd+9 dBm THD 0.1% 60 Hd+9 dBm THD 0.1% X-talk: 84.3 dB SN (wtd): 79.9 dB Frequency/attenuation 40 Hz-15 Hz: 5 0.1 dB 1020 Hd+9 dBm THD 0.1% 60 Hd+9 dBm THD 0.1% X-talk: 83.0 dB SM (wtd): 77.9 dB Bibliography Ill FLOWERS (B.G.): Interworking tests on 34 Mbitls encoders-decoders, EBU Technical Rev
43、iew, No. 269, Autumn 1996. Recommendation ITU-T J.81/amd.2 (03/98) 3 - COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling ServicesSenes A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M S
44、eries N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z ITU-T RECOMMENDATIONS SERIES Organization of the work of the ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overa
45、ll network operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, digital systems and networks Audiovisual and multimedia systems Integrated services digital network Transmission of television, sound programme and ot
46、her multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and network maintenance: intemational transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international soun
47、d programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local line networks Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communication Global information infrastructure Programming languages Printed in Switzerland Geneva, 1998 COPYRIGHT International Telecommunications Union/ITU TelecommunicationsLicensed by Information Handling Services
