Patent ID: 8315858

Claim:
A method for digitally recording an analog audio signal, the method comprising: (a) receiving an analog audio signal played at an increased speed and containing audio information and signal pause information, wherein, when receiving the analog audio signal, a playing speed of a data medium on which the analog audio signal to be recorded is settable; (b) converting the analog audio signal played at an increased speed into a digital audio signal comprising audio information data and signal pause duration data; (c) storing the audio information data of the digital audio signal as information data blocks and the signal pause duration data of the digital audio signal as signal pause data blocks having different time durations in a memory, wherein each information data block contains an information data block identifier and audio information data, and each signal pause data block contains a signal pause data block identifier and signal pause duration data specifying a length of a pause between audio events, and the audio information data and the signal pause duration data represent outputs at a normal speaking speed; (d) generating a plurality of audio information data sequences by sequentially reading the information data blocks and the signal pause data blocks, the audio information data sequences being separated by the signal pause data blocks if an assigned time duration of the signal pause data block is higher than a predetermined time duration; and (e) producing an index table by sequentially reading the information data blocks and the signal pause data blocks.