ITU-R BT 1435-2000 Digital Sound and Television Broadcasting Interaction Channel Through the PSTN ISDN《通过PSTN ISDN的数字声音和电视广播交互信道》.pdf

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1、Rec. ITU-R BT.1435 1 RECOMMENDATION ITU-R BT. 1435 DIGITAL SOUND AND TELEVISION BROADCASTNG NTERACTION CHANNEL THROUGH THE PSTN/ISDN (Question ITU-R 256/11) (2000) The ITU Radiocommunication Assembly, considering a) b) cl through the PSTN/ISDN, that there is a need to avoid proliferation of protocol

2、s for interactive services; that work on return channels is being carried out in ITU-R and ITU-T; that ITU-T has approved ITU-T Recommendation J. 113 - Digital video broadcasting interaction channel recommends 1 that for relevant applications in sound and television broadcasting the protocols includ

3、ed in ITU-T Recommendation J.113 (03/98) should be used. A summary of ITU-T Recommendation J.113 is provided in Annex 1 to this Recommendation. (The future of Recommendation ITU-R BT.1435 will take into account the evolution of ITU-T Recommendation J.113.) ANNEX 1 Summary of ITU-T Recommendation 5.1

4、13 - Digital video broadcasting interaction channel through the PSTNDSDN This Recommendation describes the provision of return channel protocols over PSTN/ISDN to, and independently of, digital broadcast systems. Other relevant Recommendations are Recommendation ITU-R BT. 1369 which describes the ba

5、sic principles for a worldwide common family of systems for the provision of interactive television services and ITU-T Recommendation J. 11 1 which describes the network independent return channel protocols. This Recommendation describes the network independent protocols, i.e. those within the OS1 reference model transport and physical layers for the PSTN/ISDN. COPYRIGHT International Telecommunications Union/ITU RadiocommunicationsLicensed by Information Handling Services