Mitsubishi Electric Corporation

Tadashi Sakaguchi

Jun Ido

Daiki Matsuura

Keiichi Shirasuka

Mitsuru Takeuchi

Soichiro Matsumoto

Masakazu Morita

Minoru Sota

An unreceivability detector () that, based on various information obtained from a signal received from a broadcasting station of a digital broadcast program being viewed/listened to, detects that the received signal of that broadcasting station is currently unreceivable and outputs an unreceivability notification, an affiliated station memory () that stores channel information of the program being viewed/listened to and channel information of a station affiliated with that broadcasting station, and a tuning control unit () that, when it receives an unreceivability notification from the unreceivability detector, retrieves the channel information of the affiliated station from the affiliated station memory () and permits the program of the affiliated station to be viewed/listened to, if it is currently in a receivable state, and outputs an instruction to make a channel search for an affiliated station if no affiliated station is stored in the affiliated station memory are provided. When the program being viewed/listened to becomes unviewable/unlistenable, the time during which program viewing/listening is interrupted can be shortened.

Digital broadcast receiver and receiving method

A delay profile generating circuitgenerates a delay profile signal. Concerning the delay profile signal, a ghost decision circuitmakes a decision as to the presence or absence of ghosts that will appear during traveling of a mobile vehicle in response to a transmission mode signal fed from a changeover switch. The delay profile signal and the decision signal about the presence/absence of the ghosts are delivered to a window control circuitvia an accumulator. The window control circuitsets and controls the FFT window position of an FFT circuitin response to a guard correlation signal fed from a guard correlation signal generating circuitand a signal fed from the accumulator

Digital broadcasting receiving apparatus with channel estimation function

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Tokyo, Japan

Tadashi Sakaguchi