| 摘要 |
A system for broadcasting digital information includes a digital video front end processor configured to process a digital video signal for broadcast by a digital video transmitter. The digital signal includes a plurality of sequential datagrams and the digital video front end processor may be configured to generate a digital transmission stream in response to the digital video signal and to modulate the digital transmission stream. The system further includes a first transmitter configured to receive the modulated digital transmission stream from the front end and to broadcast the modulated digital transmission stream over a first communication interface, and a second transmitter configured to receive the plurality of datagrams and to transmit selected ones of the plurality of datagrams to a receiving terminal over a second communication interface different from the first communication interface in response to a request from the receiving terminal.
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