Method and digital broadcasting receiver for displaying digital broadcast channel information

A digital broadcasting receiver having a display screen with a PIP function, which comprises:

• a receiver module for receiving digital broadcast data and searching for an unused reserve communication path among all communication paths over which the digital broadcast data is transmitted;
• a memory for storing digital broadcast channel guide information received through the receiver module;
• a controller for extracting identifiers of channels, other than the one currently selected, from the digital broadcast channel guide information stored in the memory and receiving video data of programs broadcast on channels corresponding to the identifiers through the reserve communication path, with changes of channel according to the identifiers;
• and
• a demux module for extracting image data from video data of each channel received through the reserve communication path, extracting digital broadcast channel guide information corresponding to the extracted image data from the memory and displaying the extracted information together with the image data on the display window under the control of the controller.

A method for displaying digital broadcast channel information on a digital broadcasting receiver with a Picture in Picture (PIP) function, which comprises the steps of:

• selecting a channel other than the one currently selected according to a broadcast information display manner set by a user;
• receiving video data corresponding to a channel identifier of the selected channel;
• generating a PIP sub-screen for outputting the received video data;
• and
• processing and outputting the received video data to the generated PIP sub-screen.

A digital broadcasting receiver having a display screen with a Picture in Picture (PIP) function, which comprises:

• a receiver module for receiving digital broadcast data and searching for an unused reserve communication path among all communication paths over which the digital broadcast data is transmitted;
• a memory for storing digital broadcast channel guide information received through the receiver module and PIP display information on a PIP sub-screen which will be generated on the display screen using the PIP function;
• a controller for extracting one of identifiers of channels other than the one currently selected from the digital broadcast channel guide information according to a preset broadcast information display manner and receiving video data corresponding to the extracted identifier through the reserve communication path detected by the receiver module;
• a first digital signal processor for decoding broadcast data of the currently selected channel and outputting the decoded broadcast data to the display screen;
• a second digital signal processor for decoding video data received through the reserve communication path and outputting the decoded video data to the PIP sub-screen generated on the display screen under the control of the controller;
• and
• a demux module for demultiplexing broadcast data received from the receiver module and outputting the broadcast data of the currently selected channel to the first digital signal processor and the video data corresponding to the extracted identifier to the second digital signal processor.