Recording and playback apparatus, recording and playback...

Details Recording and playback apparatus, recording and playback... Recording and playback apparatus, recording and playback...

2005-11-15

2009-11-17

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Control of information signal processing channel

C369S030580, C369S053200

Reexamination Certificate

active

07619953

ABSTRACT:
A recording and playback apparatus for recording data on a recording medium that allows additional writing includes a recording device configured to record first data on the recording medium; a random-number generator configured to generate a random number; and a calculator configured to calculate a first identification code indicating that the first data has been recorded on the recording medium by the recording and playback apparatus, by applying a predetermined function to data included in the first data recorded on the recording medium by the recording device, the data including second data that changes on each recording on the recording medium by the recording device and including the random value generated by the random-value generator. The recording device further records the random value generated by the random-number generator and the first identification code calculated by the calculator so that the random value and the first identification code are included in the first data.

REFERENCES:
patent: 6814283 (2004-11-01), Fujimoto
patent: 7043620 (2006-05-01), Matsuno et al.
patent: 7346169 (2008-03-01), Asano et al.
patent: 2002/0025039 (2002-02-01), Kato et al.
patent: 2002/0144114 (2002-10-01), Barnard et al.
patent: 2005/0235156 (2005-10-01), Chen
patent: 2003-331563 (2003-11-01), None
patent: 2003096346 (2003-11-01), None
patent: WO 01/99333 (2001-12-01), None

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