Patent ID: 7081578

Claim:
A musical performance information compression apparatus which receives an input of a file including an event constituted of at least information of a sounding start pitch, information of loudness, information of a sounding end pitch, and other information, and information of a relative time between the events, and having track data attributed to a predetermined channel and which compresses the file, the apparatus comprising: primary code production section which separates track data of the file into a plurality of track data attributed to channels, holds information indicating attribution to the channel, further separates the track data attributed to each channel for each information, integrates the separated information by each type of the information regardless of the attribution to the channel, and disposes the information in an independent region for each type to produce a primary code; and secondary code production section which compresses each information disposed in each region of the primary code produced by the primary code production means by a predetermined compression method.