Patent ID: RE42297

Claim:
A device for reproducing a digital signal data recorded on a medium, the digital signal data including a video signal data and an audio signal data , the audio signal data being composed of data units, the data units corresponding to at least one of: 1) a first type of digital audio data, and 2) a second type of digital audio data which includes at least one content different from the first type of digital audio data; each data unit including attribute information, which has: a) first information indicating a coding mode of the digital audio data, and b) second information, different than said first information, identifying the data unit as one of the first type of digital audio data or the second type of digital audio data; the data units of digital audio signal data being interleaved between data units of digital video signal data , the device comprising: a demodulator for demodulating configured to demodulate the digital signal audio data to restore an original signal; a signal processor for receiving configured to receive the digital audio signal data , demodulated by the demodulator, extracting extract the second information, separating and separate the data units corresponding to a the first type of digital audio signal data from data units corresponding to a the second type of digital audio signal data based on the extracted second information, said signal processor including a system time clock, a memory for storing configured to store the data units corresponding to the first type and the second type types of digital audio signal data , and first or second an audio presentation parts receiving part configured to receive the system time clock to control a presentation timing of the first type or the second type types of digital audio signal data ; and a controller, coupled to the signal processor, controlling configured to control the signal processor to output the data units corresponding to the first type or the second type types of the digital audio signal data designated by a user input, wherein the first or second type types of digital audio signal data , designated by the user input, is identified using the second information.