Patent ID: 6819642
Filing Date: 2004-11-16
Classification: G11B

Abstract:
A data recording device for carrying out recording of data onto a first optical disc prescribed by a first standard and for carrying out recording of data onto a second optical disc prescribed by a second standard and having a higher recording density than the first optical disc, the device comprising:data input means to which data to be recorded is inputted and producing output data; first interleave processing means for performing interleave processing with a first delay parameter on the output data from the data input means; second interleave processing means for carrying out interleave processing with a second delay parameter greater than the first delay parameter on the output data from the data input means; switching means for switching of the output data between the first interleave processing means and the second interleave processing means; data writing means for writing the data interleaved by the first interleave processing means or the second interleave processing means onto an optical disc; and disc discrimination means for discriminating whether the optical disc on which the data is to be written by the data writing means is the first optical disc or the second optical disc having a higher recording density than the first optical disc, wherein the first optical disc and the second optical disc have wobbled grooves, and the disc discrimination means discriminates whether the optical disc on which the data is written by the data writing means is the first optical disc or the second optical disc, on the basis of a synchronization pattern obtained by reading out wobbling information from the wobbled grooves, and when it is determined by the disc discrimination means that the optical disc on which the data is to be written by the data writing means is the first optical disc, the switching means selects the first interleave processing means and the data writing means writes onto the first optical disc the data interleaved with the first delay parameter by the first interleave processing means, and when it is determined by the disc discrimination means that the optical disc on which the data is to be written by the data writing means is the second optical disc having a higher recording density than the first optical disc, the switching means selects the second interleave processing means and the data writing means writes onto the second optical disc the data interleaved with the second delay parameter by the second interleave processing means.