DIGITAL BROADCAST RECEIVING SYSTEM

摘要

In the event of a short-break (discontinuity) of a signal, which may occur at switching over a transmission system to another at a transmission station and instantaneously cease, a receiver can minimize the effect of the short-break of the service so that a user at the receiver can observe the audio-visual presentation without finding the discontinuity. A receiver is so constructed that it detects a short-break of digital broadcasting wave by the absence of a synchronizing code or by a transmission control signal multiplexed with the broadcasting wave and, according to the short-break detection signal, holds data and state information (program arrangement, and reference time information) obtained by an antenna and converter 1, tuner and digital decoding portion 2, an error correction code decoding portion 3, a stream multiplexed signal separating portion 4, an audio/video decoding portion 5 and the other components and performs a process for optimally changing characteristics of closed loops for establishing synchronization.