Patent ID: 8285110

Claim:
A data processing method for determining record data allocation on an information recording medium having a plurality of recording layers, the method comprising: an allowable jump range determining step of determining, in a decoding unit, an allowable range of an intra-layer jump and an inter-layer jump performed in a playback processing of said information recording medium, the allowable range of the inter-layer jump being no more than 40,000 sectors, and the allowable range of the intra-layer jump being 1/10-stroke, a full stroke being equivalent to a range from an innermost side to an outermost side of the recording medium, and the 40,000 sectors being less than the 1/10-stroke; a required jump time calculating step of calculating, in the decoding unit, a required time for the intra-layer jump and the inter-layer jump on the basis of allowable jump range information determined in said allowable jump range determining step; and a consecutive data allocation size determining step of determining, in the decoding unit, an allowable minimum consecutive data size of data to be stored in the information recording medium on the basis of the required jump time calculated in said required jump time calculating step.