Patent ID: 6961892
Filing Date: 2005-11-01
Classification: G11C

Abstract:
1. An address information detecting apparatus, comprising: address information detecting means for detecting address information which includes (i) an address indicating an absolute location on a recording medium and (ii) an error detecting code related to the address; error detecting means for detecting, according to the error detecting code, whether or not a detected address includes an error; first interpolation address generating means for (a) choosing either the detected address or a tentative first interpolation address in accordance with a consistent signal, and (b) outputting the address chosen in (a) as a first interpolation address used for comparison with a following detected address, the consistent signal indicating whether or not the detected address is consistent with the tentative first interpolation address generated in accordance with either an immediately preceding address or a previous first interpolation address corresponding to the immediately preceding address; second interpolation address generating means for (I) choosing either the detected address or a tentative second interpolation address in accordance with an error detection signal supplied from the error detecting means, and (II) outputting the address chosen in (I) as a second interpolation address used for comparison with the following detected address, the tentative second interpolation address being generated in accordance with either the immediately preceding address or a previous second interpolation address corresponding to the immediately preceding address; and address comparison means for adopting either (1) the detected address as absolute location information when the detected address is consistent with either the first interpolation address or the second interpolation address and also the error detection signal indicates error-free, or (2) the first interpolation address as the absolute location information in situations other than (1).