DIGITAL BROADCAST RECEPTION CIRCUIT, DIGITAL BROADCASTS RECEPTION DEVICE USING THE SAME, AND ITS CONTROL METHOD

摘要

A digital broadcast reception circuit that can perform switching of video and audio without interruption and can realize a reduction in power consumption, a digital broadcast reception device including the digital broadcast reception circuit, and a method of controlling the digital broadcast reception device are provided. The digital broadcast reception circuit is used in a digital broadcast reception device that receives digital broadcast signals transmitted as signals in plural hierarchical levels of different qualities derived from one content, and outputs, among a plurality of output signals generated by processing the signals in plural hierarchical levels in signal processing units, respectively an output signal based on a signal in a selected hierarchical level. The digital broadcast reception circuit includes: a switching control unit that judges a reception status of each of the signals in plural hierarchical levels in order to select one of the hierarchical levels with respect to which the output signal is to be generated, generates a switching signal for outputting a signal in the selected one of the hierarchical levels, and partly or entirely deactivates part of the signal processing units that processes a signal in an unselected one of the hierarchical levels; and an output switching unit that switches an output signal based on the switching signal.