| 摘要 |
<p>A packet-transmitting system comprising a transmitter and a receiver. In the transmitter, the packet-allocating circuit receives a stream of packets. The circuit allocates the packets having PIDs a1 to b1 to the transmission channel #1, the packets having PIDs a2 to b2 to the transmission channel #2, and so forth. The circuit allocates the packets having PIDs a N to b N to the last transmission channel #N. The control-data generating circuit time-divides and multiplexes packet-group data (groups of PIDs) representing the groups of packets to be transmitted via the channels #1 to #N, thereby generating control data to be transmitted through the transmission channel #0. The packets in the channels #0 to #N are multiplexed by a CDM system. In the receiver, the groups of packets, transmitted via the channels #1 to "N, are recognized from the control data transmitted via the channel #0, and only the signals transmitted via the channel designated by a user are extracted and reproduced. Thus, the receiver can therefore receive only the packet the user desires.</p> |
