Patent ID: 7848184

Claim:
A reproducing method for reproducing real time data from a disk-shaped information recording medium, the disk-shaped information recording medium being recorded with a real time file including the real time data so that the real time data is continuously reproduced while the real time data is reproduced according to a reproduction model, wherein: the reproduction model includes a pickup that reads the real time data from the disk-shaped information recording medium, a buffer memory that temporarily stores the real time data read by the pickup, and a decoding module that reads the real time data from the buffer memory and processes the read real time data, and access performance of the reproduction model is provided by the following formula, Tacc=A·dN+Trev+B where Tacc is an access time that is a time required for the pickup to move from one area to another area, dN is a difference in rotational speed of the disk-shaped information recording medium before and after the movement of the pickup, Trev is a rotation waiting time at a target access position, A and B are constants; the reproducing method comprising the steps of: reading the real time data from the disk-shaped information recording medium, storing temporarily the read real time data to the buffer memory, reading the real time data stored in the buffer memory and decoding the read real time data by the decoder, and after completion of access to previous real time data, accessing the next real time data within the access time Tacc.