Method and apparatus for auto channel searching of Digital television receiver

摘要

The present invention relates to an automatic channel search method and apparatus for a digital TV receiver for automatically searching for information of a channel to be added or deleted. The present invention comprises the steps of: receiving a digital broadcast signal including a broadcast program and a system information (SI) therefor; Checking for frequency changes from a first table in the SI; Acquiring at least one of a second table and a third table in the SI to check if there is a change to a program within the frequency if there is no frequency change; Outputting a channel change notification on a screen if there is a change in a program from at least one of the acquired second table and third table; And updating and storing the changes through channel auto-discovery. Therefore, the present invention periodically checks the information of newly added or deleted channels, and automatically searches for and saves the changes, so that the user does not need to check whether the channel is changed at any time, and can quickly and immediately know the changed information in real time. And automatically receive changed information.;Channel, information, search, digital TV, change, PAT, SDT, PMT, PID, MMS