APPARATUS AND METHOD OF CHANNEL CHANGING ON DIGITAL BROADCAST SYSTEM

摘要

A device and a method for changing a channel in a digital broadcasting system are provided to carry out channel conversion between logic channels without any additional CAS(Conditional Access System) processing, thereby reducing a time required for the channel conversion. A device for channel conversion in a digital broadcasting system includes a tuner(210) for carrying out tuning of a physical channel, and a CAS(Conditional Access System;230) for restraining access to the tuned physical channel. A demultiplxer(240) carries out demultiplexing for the physical channel to distinguish logic channels included in the physical channel. A control part(270) controls the tuner, the CAS, the demultiplexer, and a demodulation part(220) to receive and output the logic channels corresponding to a user's channel conversion request as the request is received.