Digital broadcast receiving device and method using the same

A digital broadcast receiving device, composing:

• a text data reading unit for reading text data from a bit stream of a digital broadcast program;
• a text data synchronizing unit for synchronizing the read text data to currently-broadcast video data and/or audio data;
• a text data outputting unit for outputting the read text data to a display,
• a text data classifying unit for classifying the text data according to characteristics of the read text data;
• and
• a text data selecting unit for selecting among the classified text data text data for indicating on the display, wherein the text data outputting unit outputs the text data selected by the text data selecting unit to the display;
• wherein the text data outputting unit outputs the read text data in a manner such that a certain portion synchronized to the currently-broadcast video data and/or audio data can be distinguished;
• and
• wherein the text data classifying unit comprises:
• a system time table (STT) classifying unit for classifying a STT text data according to STT of a program and system information protocol (PSIP) provided for the read text data;
• an event information table (EIT) classifying unit for classifying an EIT text data according to an EIT of the PSIP;
• an extended text table (ETT) classifying unit for classifying an ETT text data according to an ETT of the PSIP;
• a program map table (PMT) classifying unit for classifying a PMT text data according to a PMT of a PSI provided for the read text data;
• and
• a DTVCC (digital television closed-captioning) classifying unit for classifying a DTVCC text data according to DTVCC data of the PSI.

A digital broadcast receiving method, comprising the steps of:

• reading a text data from a bit stream of a digital broadcast program;
• synchronizing the read text data to a currently-broadcast video data and/or audio data by searching ETT text data for a portion that corresponds to caption data;
• and
• displaying the synchronized read text data on a display.

A digital broadcast receiving method, comprising:

• reading a text data from a bit stream of a digital broadcast program;
• synchronizing the read text data to a currently-broadcast video data and/or audio data;
• displaying the read text data on a display, wherein the displaying step displays the read text data in a manner such that a certain portion synchronized to the currently-broadcast video data and/or audio data is easily distinguishable;
• classifying the text data according to characteristics of the read text data;
• and
• selecting among the classified text data text data for displaying on the display, wherein the displaying step displays the selected text data on the display;
• wherein the text data classifying step comprises the steps of:
• classifying a system time table (STT) text data, an event information table (EIT) text data, and an extended text table (ETT) text data corresponding to an STT, an EIT and an ETT of a program and system information protocol (PSIP) provided for the read text data;
• and
• classifying a program map table (PMT) text data and a DTVCC text data corresponding to a PMT and a DTVCC of a PSI provided for the read text data.