Patent ID: 7793054

Claim:
A DVD player comprising: a flash memory in which a to-be-held information area divided into a plurality of unit areas for storing a plurality of offset information, the content of which is required to be held even in a power-off state, is provided, said unit areas being ordered in a predetermined direction in either ascending or descending order of address; a temporary memory for storing data temporarily; an input section to which a user's command is given; a control section in which said flash memory and said temporary memory are incorporated for controlling the entire device based on a command from said input section; and a power supply section for supplying said input and control sections with driving power by using a commercial power supply as the primary power supply, said control section having: information management means for managing information such that, for each time when modification of setup information is finished based on the command given from said input section, data is successively read out for the unit areas of said to-be-held information area in said predetermined direction, upon reading out of data indicating a cleared state, the unit area in which the data is read out is determined to be a free unit area in which no information is stored, and the modified setup information is successively written into the free unit area within said to-be-held information area without erasing setup information that has already been stored in said to-be-held information area; control means for controlling such that, when a command for power-off is given from said input section, said power supply section is controlled for supplying only said input section and a part of said control section with operating power to set a standby state; and area recovery means for reading out and writing information such that, upon the standby state, data is successively read out for the unit areas of said to-be-held information area in said predetermined direction, upon reading out of data indicating a cleared state, the unit area in which the data is read out is determined to be a free unit area in which no information is stored, setup information stored in the unit area immediately before the determined free unit area is read out to be written into said temporary memory, and then all the data in said to-be-held information area is cleared, and the setup information read out from said temporary memory is written into a head unit area of said to-be-held information area in said predetermined direction, wherein said control means controls said power supply section to set the power-off state after the data is written into the head unit area by said area recovery means.