ITU
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- 【組 織】ITU
- 【文件編號】ITU-R REPORT BT.1206
Methods for picture quality assessment in relation to impairments from digital coding of television signals
- 【日 期】1990/1/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R REPORT BS.945-2
Methods for the assessment of multiple interference
- 【日 期】1990/1/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R REPORT 1170
MOBILE-SATELLITE COMMUNICATION SYSTEMS USING HIGHLY INCLINED ELLIPTICAL ORBITS
- 【日 期】1990/1/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R REPORT M.741-3
Multi-channel land mobile systems for dispatch traffic (with or without PSTN interconnection)
- 【日 期】1990/1/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R REPORT BO.954-2
Multiplexing methods for the emission of several digital audio signals and also data signals in broadcasting
- 【日 期】1990/1/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R REPORT BS.1201
Number of HF sound broadcasting transmitters using a single channel
- 【日 期】1990/1/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R M.540-2
OPERATIONAL AND TECHNICAL CHARACTERISTICS FOR AN AUTOMATED DIRECT-PRINTING TELEGRAPH SYSTEM FOR PROMULGATION OF NAVIGATIONAL AND METEOROLOGICAL WARNINGS AND URGENT INFORMATION TO SHIPS
- 【日 期】1990/1/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R REPORT 1160
OPERATIONAL AND TECHNICAL CHARACTERISTICS OF THE SYSTEM FOR THE PROMULGATION OF MARITIME SAFETY INFORMATION USING HF NARROW-BAND DIRECT-PRINTING SYSTEMS
- 【日 期】1990/1/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R REPORT 919-2
Performance of a Low-Altitude, Polar-Orbiting Satellite EPIRB System - Question 90/8
- 【日 期】1990/1/1
- 【語 言】English
- 【狀 態】Active
- 【組 織】ITU
- 【文件編號】ITU-R REPORT 917-2
PERMISSIBLE LEVELS OF INTERFERENCE INTO TELEPHONE CHANNELS IN THE MARITIME MOBILE-SATELLITE SERVICE
- 【日 期】1990/1/1
- 【語 言】English
- 【狀 態】Active
