Patent ID: 8077746

Claim:
A method of generating an information signal to be recorded, comprising the steps of: multiplexing 1) a compressively-encoding-resultant video signal which results from compressively encoding a video signal, 2) a first compressively-encoding-resultant audio signal which results from compressively encoding a first audio signal having a synchronized relation with the video signal, 3) a reference clock information signal relating to synchronization between the compressively-encoding-resultant video signal and the first compressively-encoding-resultant audio signal, and 4) an indication timing information signal based on the reference clock information signal and designating an indication timing of the video signal to get an audio-visual multiplexing-resultant signal; generating a second audio signal; compressively encoding the second audio signal to get a second compressively-encoding-resultant audio signal; adding a sound-production-timing information signal to the second compressively-encoding-resultant audio signal to get a substitution playback audio signal which can be reproduced instead of the first audio signal while being synchronous with reference clock information represented by the referenced clock information signal during playback, the sound-production-timing information signal being based on the reference clock information signal; generating a play list from the audio-visual multiplexing-resultant signal and linking the play list with the substitution playback audio signal; and recording the compressively-encoding-resultant video signal and the second compressively-encoding-resultant audio signal on a recording medium while non-multiplexing the second compressively-encoding-resultant audio signal with the compressively-encoding-resultant video signal.