Patent ID: 8446805
Filing Date: 2013-05-21
Classification: G11B

Abstract:
1. A method of recording a signal on a disc-shaped information recording medium comprising a plurality of recording layers on and from which an information signal and a test signal can be optically recorded and reproduced while a laser beam emitted from an optical pickup is applied to the recording layers through one side of the medium, data areas provided in the recording layers respectively and being for storing the recorded information signal, optical recording test areas provided in the recording layers respectively, and recording management areas provided in the recording layers respectively, the method comprising the steps of: using the optical pickup and thereby recording the test signal on the optical recording test area in a first recording layer among the recording layers; moving the optical pickup to a position corresponding to a second recording layer among the recording layers, the second recording layer differing from the first recording layer; moving the optical pickup to a position which corresponds to the optical recording test area in the second recording layer and which is out of overlap with the optical recording test area in the first recording layer as viewed in a direction of propagation of the laser beam; using the optical pickup and thereby recording the test signal on the optical recording test area in the second recording layer; reproducing the test signal from the optical recording test area in the first recording layer; deciding a first optimum power value of a laser beam for signal recording on the first recording layer in response to the test signal reproduced from the optical recording test area in the first recording layer; reproducing the test signal from the optical recording test area in the second recording layer; deciding a second optimum power value of a laser beam for signal recording on the second recording layer in response to the test signal reproduced from the optical recording test area in the second recording layer; moving the optical pickup to a position which corresponds to one of the recording management areas in the first recording layer and the second recording layer and which is between the optical recording test areas in the recording layers as viewed in the direction of propagation of the laser beam; and recording, on only said one of the recording management areas in the first recording layer and the second recording layer, recording management information having a first piece about the recording of the test signal on the first recording layer, a second piece about the recording of the test signal on the second recording layer, a third piece for identifying an apparatus which made recording of information, a fourth piece representative of a name of a manufacturer of said apparatus, and a fifth piece representative of an additional identification of said apparatus, wherein said recording of said first through fifth pieces occurs on one recording layer and occurs between the optical recording test areas of said first and second recording layers as viewed in the direction of propagation of the laser beam.