Method and system for displaying digital broadcast data

A portable terminal for processing digital broadcast signals, the portable terminal comprising:

• a digital broadcast receiver that includes a tuner for tuning to a frequency of a selected broadcast channel, a demodulator for demodulating broadcast signals output from the tuner, and a decoding unit for classifying the demodulated broadcast signals as audio, video, and broadcast information and for decoding the classified broadcast signals, respectively;
• a controller for controlling the digital broadcast receiver in response to a received broadcast playback request and channel information through a first communication unit and controlling the first communication unit to transmit the demodulated broadcast signals to an external device, wherein the decoding unit does not decode the demodulated broadcast signals during transmission of the demodulated broadcast signals to the external device;
• the first communication unit for wirelessly receiving the broadcast playback request and channel information from the external device and transmitting the demodulated broadcast signals of the digital broadcaster receiver to the external device, wherein a display unit and a speaker do not display and output the demodulated broadcast signals during the transmission of the demodulated broadcast signals to the external device through the first communication unit;
• and
• a second communication unit for wirelessly communicating a communication signal between the portable terminal and a base station,
• wherein the portable terminal wirelessly provides an incoming communication event or an outgoing communication event when a communication event is generated, while simultaneously wirelessly providing the broadcast signals for playback through the external device, and
• wherein a protocol structure of a data stream for playing back broadcast signals output from the decoding unit includes a main Command field and a sub Command field that provide notification of digital broadcasting and a state of the portable terminal.

A method for processing a broadcast signal of a portable terminal having a digital broadcast receiver, the method comprising:

• wirelessly receiving a digital broadcast playback request and selected channel information from an external device through a first communication unit of the portable terminal;
• controlling the digital broadcast receiver to select a broadcast channel according to the selected channel information, demultiplexing a broadcast signal of the selected broadcast channel, and demodulating the demultiplexed broadcast signal;
• and
• wirelessly transmitting the demodulated broadcast signal through the first communication unit to the external device having a decoding unit for decoding the demodulated broadcast signal,
• wherein the first communication unit wirelessly transmits the demodulated broadcast signal of the digital broadcaster receiver to the external device and performs data communication between the portable terminal and the external device,
• wherein the portable terminal wirelessly provides an incoming communication event or an outgoing communication event when a communication event is generated, while simultaneously wirelessly providing the broadcast signal for playback through the external device, and
• wherein a protocol structure of a data stream for playing back broadcast signals output from the decoding unit includes a main command field and a sub command field that provide notification of digital broadcasting and a state of the portable terminal.