| 摘要 |
<P>PROBLEM TO BE SOLVED: To automatically receive emergency warning broadcasting in a retransmission system. <P>SOLUTION: At a transmitting side of IP retransmission, a start-up signal for emergency warning broadcasting is detected from a transmission control signal contained in a digital broadcasting signal, and a start-up packet for emergency warning broadcasting based on the start-up signal for emergency warning broadcasting detected by a detection circuit is broadcast-transmitted to an IP network. A gateway device includes an address memory for storing an address of a receiving device for IP retransmission connected via a network line and when the broadcast-transmitted start-up packet for emergency warning broadcasting is received from an accommodation station that receives an IP packet from an IP retransmission apparatus, the start-up packet is transmitted to the receiving device for IP retransmission. When the start-up packet is received from the gateway device, the television receiver then causes a demultiplexer to select a packet required for decoding emergency warning broadcasting from a stream of contents. Thus, even in IP retransmission, emergency warning broadcasting can also be automatically received. <P>COPYRIGHT: (C)2009,JPO&INPIT |
