ITU-T N 51-1988 DEFINITIONS FOR APPLICATION TO INTERNATIONAL TELEVISION TRANSMISSIONS《适用于国际电视播送的定义-维护国际声音节目和电视传输电路(第4研究组)共7页》.pdf

1、INTERNATIONAL TELECOMMUNICATION UNION)45G134 . TELECOMMUNICATIONSTANDARDIZATION SECTOROF ITU-!).4%.!.#%G0G0/ for convenience, the term broadcasting organization is used to denote the activity of any useror customer and, where so used, it is equally applicable to any other customer requiring sound-pr

2、ogramme or televisiontransmissions.3 broadcasting organization (send)The broadcasting organization at the sending end of an international television transmission.4 broadcasting organization (receive)The broadcasting organization at the receiving end of an international television transmission.5 inte

3、rnational television centre (ITC)A centre at which at least one international television circuit (see 9) terminates and in which internationaltelevision connections (see 13) can be made up by the interconnection of international and national television circuits.6 national television centre (NTC)A ce

4、ntre at which two or more national television circuits terminate and at which national television circuitsmay be interconnected.7 television circuit sectionThe unidirectional national or international television transmission path between two stations at which theprogramme is accessible at video freq

5、uencies. The transmission path may be established via terrestrial or singledestination satellite routing. (See Note 2 above and Figures 1/N.51 and 3/N.51.)8 international multiple destination television circuit sectionThe unidirectional television transmission path from one frontier station to two o

6、r more of the frontier stationsat which interconnection is made at video frequencies. (See Note 2 above and Figure 4/N.51.)2 Fascicle IV.3 - Rec. N.519 international television circuitThe transmission path between two ITCs which comprises one or more television circuit sections (national orinternati

7、onal) together with any necessary video equipment. The transmission path may be established via terrestrial orsingle destination satellite routing. (See Note 2 above and Figures 1/N.51 and 3/N.51.)10 international multiple destination television circuitThe unidirectional transmission path from one I

8、TC to two or more other ITCs comprising television circuitsections (national or international) one of which is an international multiple destination circuit section, together with anynecessary video equipment. (See Note 2 above and Figure 4/N.51.)11 international television linkThe unidirectional tr

9、ansmission path between the ITCs of the two terminal countries involved in aninternational television transmission. The international television link comprises one or more international televisioncircuits (see Figures 1/N.51 and 3/N.51) interconnected at intermediate ITCs. It can also include nation

10、al televisioncircuits in transit countries. (See Note 2 above and Figure 2/N.51.)12 international multiple destination television linkThe unidirectional transmission path between the ITCs of the terminal countries involved in an internationalmultiple destination television transmission. The internat

11、ional multiple destination television link comprises internationaltelevision circuits, one of which is an international multiple destination television circuit. (See Note 2 above and Figure5/N.51.)13 international television connectionThe unidirectional transmission path between the broadcasting org

12、anization (send) and the broadcastingorganization (receive) comprising the international television link extended at its two ends over national televisioncircuits to the broadcasting organization. (See Note 2 above and Figure 2/N.51.)14 international multiple destination television connectionThe uni

13、directional transmission path between the broadcasting organization (send) and two or morebroadcasting organizations (receive) comprising the international multiple destination television link extended at its endover national television circuits to the broadcasting organizations. (See Note 2 above a

14、nd Figure 5/N.51.)15 send reference stationThe transmit sub-control station of an international multiple destination television circuit section (see 8),circuit (see 10) or link (see 12). (See Figures 4/N.51 and 5/N.51.)16 programme originatorA customer at a transmitting country needing up-linking of

15、 a transmission to television receive-only stations(TVROs) not related to an ITC (see Figure 6/N.51).17 international satellite transmission centre (ISTC)A centre at a transmitting country responsible for the national extension and up-link to satellite. This term isapplicable only for transmission t

16、o TVROs not related to an ITC (see Figure 6/N.51).18 television receive-only station (TVRO)An earth station which is used only for reception (see Figure 6/N.51). In this respect the term is used to denoteany TVRO whose owner is authorized to receive the programme material.19 fault reporting centre (

17、FRC)A centre at a receiving country dealing with enquiries and fault reports concerning transmission to TVROs notrelated to an ITC. (See Figure 6/N.51.)Fascicle IV.3 - Rec. N.51 3d01-scFIGURE 1/N.51.D01d02-scFIGURE 2/N.51.D024 Fascicle IV.3 - Rec. N.51d03-scFIGURE 3/N.51.D03Fascicle IV.3 - Rec. N.51 5d04-scFIGURE 4/N.51.D046 Fascicle IV.3 - Rec. N.51d05-scFIGURE 5/N.51.D05Fascicle IV.3 - Rec. N.51 7d06-scFIGURE 6/N.51.D06