Patent ID: 7508744
Filing Date: 2009-03-24
Classification: G03H,G11B

Abstract:
1. A recording and reproducing apparatus comprising: a recording control section for recording plural pages data by irradiating a holographic recording medium with a reference light beam and an information light beam, the medium including a plurality of recording unit regions and being capable of having plural pages data multiplex-recorded in each of the recording unit regions; a reproducing control section for selectively reproducing specific page data among the plural pages data multiplex-recorded in one of the plurality of recording unit regions, by irradiating the medium with the reference light beam; a measuring section for causing the recording control section to record specific page data in a recording unit region A, which is one of the plurality of recording unit regions, to measure a maximum multiplex-recordable number N of the recording unit region A; a multiplicity setting section for setting (i) a multiplex-recording number M (M<N) of page data to be recorded in the recording unit region A and (ii) a multiplex-recording number (N−M) of a buffer region of the recording unit region A, by using the maximum multiplex-recordable number N; and a storage section for storing the maximum multiplex-recordable number N and the multiplex-recording number M, wherein when page data B is to be recorded in the recording unit region A beyond the multiplex-recording number M, the recording control section multiplex-records page data B in the buffer region of the recording unit region A within the range of the maximum multiplex-recordable number N.