Patent ID: 6330028
Filing Date: 2001-12-11
Classification: H04N

Abstract:
An information recording device, comprising:user data storage means for storing user data produced on the basis of information obtained externally;management data storage means for storing management data which manages said user data storage means;detecting means for detecting a possible abnormality in the management data stored in said management data storage means;inhibiting means responsive to the detection of an abnormality by said detecting means for inhibiting the use of the management data stored in said management data storage means, check data getting means for getting check data indicative of the contents of the data stored in said management data storage means, andcheck data storage means for storing the check data gotten by said check data getting means,wherein said detecting means detects an abnormality in the management data by comparing the check data stored in said check data storage means and the check data obtained by said check data getting means.