Reproduction apparatus and reproduction method

A reproduction apparatus with a battery for reproducing term-managed main data, comprising:

• main data storage means for storing said term-managed main data;
• term data storage means for storing term management data for managing said term-managed main data;
• time counting means operating with said battery for counting time and producing time information;
• holding means for holding said time information counted by said time counting means when power is not supplied to said time counting means from said battery;
• and
• control means for controlling said holding means to hold said time information counted by said time counting means at a predetermined time;
• and
• connection means for allowing communication with another apparatus,
• wherein said control means adjusts, when said reproduction apparatus is connected to said another apparatus by said connection means, said counting time of said time counting means based on time information sent from said another apparatus to said reproduction apparatus, and
• wherein said adjustment of said counting time of said time counting mean is performed when said time information of said another apparatus connected to said reproduction apparatus leads said time information counted by said time counting means.

A reproduction method for a reproduction apparatus that reproduces term managed main data using a battery as a power supply, comprising the steps of:

• reading, from a timer that operates with said power supply from said battery to count time and stops time counting when said power is not supplied from said battery, time information to be used for term management of said term-managed main data and writing said time information into a nonvolatile memory that holds data even when said power is not supplied thereto from said battery;
• and
• setting said time information written in said nonvolatile memory to said timer when said power is supplied again after said power supply from said battery is interrupted,
• wherein said writing of said time information into said nonvolatile memory is performed when said reproduction apparatus enters a low power consumption mode.

A reproduction method for a reproduction apparatus that reproduces term managed main data using a battery as a power supply, comprising the steps of:

• reading, from a timer that operates with said power supply from said battery to count time and stops time counting when said power is not supplied from said battery, time information to be used for term management of said term-managed main data and writing said time information into a nonvolatile memory that holds data even when said power is not supplied thereto from said battery;
• setting said time information written in said nonvolatile memory to said timer when said power is supplied again after said power supply from said battery is interrupted;
• receiving a time information sent from another apparatus connected to said reproduction apparatus;
• and
• re-setting said timer based on said received time information sent from said another apparatus,
• wherein said step of re-setting said timer is performed when said receive time information sent from said another apparatus leads said time produced by said timer.