Information recording/reproducing apparatus

Details Information recording/reproducing apparatus Information recording/reproducing apparatus

2005-04-26

2005-04-26

Tran, Thang V. (Department: 2653)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S084000, C369S059140

Reexamination Certificate

active

06885626

ABSTRACT:
An information recording/reproducing apparatus which allows freer utilization of data compressed under different data compression schemes. When data recorded on a magneto-optical disc of an MD under the ATRAC compression scheme is converted into that of the ATRAC3 compression scheme and re-recorded on the magneto-optical disc, selector switches are changed over in a predetermined combination. The data recorded under the ATRAC compression scheme is read and demodulated by a signal processing unit. The demodulation data is decoded into linear PCM data by a data expansion decoder. The linear PCM data is converted into data of the ATRAC3 compression scheme by a data compression encoder. The resultant is modulated by the signal processing unit and re-recorded on the magneto-optical disc. Here, the track numbers of the data originally recorded under the ATRAC compression scheme are kept unchanged, and associated with the data which is converted and recorded under the ATRAC3 compression scheme. UTOC data thereof is recorded on the MD.

REFERENCES:
patent: 5654946 (1997-08-01), Kim et al.
patent: 5802240 (1998-09-01), Asai
patent: 6205104 (2001-03-01), Nagashima et al.
patent: 6567470 (2003-05-01), Hirosawa
patent: 6683911 (2004-01-01), Inoue
patent: 1 001 420 (2000-05-01), None
patent: 1 073 052 (2001-01-01), None

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