| 摘要 |
PROBLEM TO BE SOLVED: To support operation in desired wave transmission by fast transmitting receiving status visualizing information such as constellation information of digital transmission, information about a receiving status of a peripheral band and others, without using a new video transmission line during direction adjustment. SOLUTION: At a transmission apparatus of a relay stage for receiving a transport stream (TS) signal modulated by a digital modulation scheme, performing digital modulation thereon and transmitting the TS signal, a redundant data amount in the received TS signal is detected to vary an output rate, receiving status visualizing information detected on the relevant relay stage is converted into a TS signal, and NULL data in a video TS signal are exchanged with the receiving status TS signal and transmitted after performing digital modulation thereon. At each of transmission apparatuses on next and following stages, a digital modulation signal is detected from received and demodulated TS output, such that the receiving status visualizing information is outputted and displayed. COPYRIGHT: (C)2009,JPO&INPIT |
