Method for recognizing tempo and phases in a piece of music in digital format approximates tempo and phase by statistical evaluation of time gaps in rhythm-related beat information and by clock pulses in audio data.

摘要

An approximate tempo (A) for a piece of music is determined by a statistical evaluation (STAT) of time gaps (Ti) for rhythm-related beat information in digital audio data (Ei). An approximate phase (P) for a piece of music is determined by using the position of clock pulses in the digital audio data in a time-slot pattern for a reference oscillator with a frequency proportionate to detected tempo. A phase shift in the reference oscillator corrects phase and tempo. Independent claims are also included for a method for synchronizing pieces of music in digital format, for a music-playing device for synchronizing pieces of digital format music in real time and for a method for preparing digital audio data for pieces of music from a CD ROM data source with only one reader unit in real time.