Patent ID: 7019787

Claim:
An apparatus for automatically selecting and displaying a caption of a desired caption language from a received digital television (DTV) transmission, comprising: a receiving unit for receiving a data stream of the DTV transmission; an input control unit for receiving a caption language selection selected by a user; a decoding unit for decoding the received data stream; a PSIP (Program and System Information Protocol) tasking unit for extracting a caption descriptor from the decoded data stream; a user menu tasking unit for receiving the caption descriptor from the PSIP tasking unit whenever a broadcasting program is changed or a caption language setting is turned on or off by the user, and transmitting selected language information into a caption parsing unit; the caption parsing unit for extracting a caption service number corresponding to the caption language selection from the caption descriptor; and a caption interpreting unit for extracting caption data of the selected language corresponding to the selected caption service number and displaying the caption in the selected language on the screen, wherein the PSIP tasking unit, whenever a received program is changed, extracts and transmits the extracted caption descriptor of the received program to the user menu tasking unit.