1、QUESTION ITU-R 283/4*, *Sharing studies between high-definition television in thebroadcasting-satellite service and other services(2009)The ITU Radiocommunication Assembly,consideringa) that the development of techniques for high-definition television (HDTV) broadcasting israpidly progressing;b) tha
2、t the ITU Radiocommunication Study Groups have already carried out a number ofstudies concerning the broadcasting of HDTV signals;c) that there are allocations to the broadcasting-satellite service (BSS) in the 17.3-17.8 GHzband in Region 2, and in the 21.4-22 GHz band in Regions 1 and 3, capable of
3、 accommodatingwide RF-band HDTV;d) that the Plans for the 12 GHz band contained in Appendix 30 of the Radio Regulations(RR) can already accommodate narrow RF-band HDTV;e) that due account should be taken of other radiocommunication services appearing inArticle 5 of the RR, and sharing allocations wi
4、th the BSS,decides that the following Questions should be studied1 What are the appropriate technical provisions for sharing between the BSS when HDTV isused, and other services sharing BSS bands, in the 12, 17 and 21 GHz bands?2 What are the protection ratio requirements between HDTV and standard-d
5、efinitiontelevision (SDTV) signals, both analogue and digital, and between HDTV signals themselves?NOTE 1 See Report ITU-R BO.631,further decides1 that the results of the above studies should be included in appropriate Reports and/orRecommendations;2 that the above studies should be completed by 2011.Category: S1_* This Question should be brought to the attention of Radiocommunication Study Groups 5 and 7.* Former Question ITU-R 71/6.
