Patent ID: 7480231

Claim:
A digital dubbing device that compresses a digital signal for each predetermined compression process unit and stores compressed digital signal, the digital dubbing device comprising: a data count unit that counts minimum-unit data of the digital signal upon compression of the digital signal, and, based on index information on index of program data for the digital signal and the number of counts of the minimum-unit data, detects a data stream of a predetermined number of minimum-unit data located in an end part of the compression process unit from the digital signal; a data-stream storage unit that stores detected data stream of the predetermined number of minimum-unit data; a data-stream comparator that detects a data stream corresponding to the data stream of the predetermined number of minimum-unit data from the digital signal when the storing of the digital signal is interrupted; a signal output unit that outputs the digital signal, the index information, and subcode data which is time information for the program data; a frame detector that detects subcode data corresponding to an end part of the program data from the digital signal, as a frame which is a minimum unit of subcode data, based on the index information; a frame storage unit that stores the frame detected by the frame detector as a boundary frame; a frame comparator that detects a frame identical to the boundary frame from the digital signal when the storing of the digital signal is interrupted; and a controller that restarts the compression and storing of the digital signal from data next to the data stream detected by the data stream comparator, wherein the data count unit detects the data stream of the predetermined number of minimum-unit data from program data output after program data corresponding to the boundary frame.