A digital broadcast receiving apparatus and a digital broadcast transmitting apparatus with reduced power consumption

摘要

A digital broadcast receiving apparatus has the following construction. A receiving unit receives digital broadcast data broadcast by a digital broadcast transmitting apparatus. A control message detecting unit detects whether a control message such as an EMM (entitlement management message) is included in the data received by the receiving unit. A microcomputer executes control processing relating to the control message only when supplied with a clock signal. A mode controlling unit starts supplying the clock signal to the microcomputer when the control message is detected by the control message detecting unit, and suspends supply of the clock signal to the microcomputer when it has completed control processing relating to the control message.