Patent ID: 8787131

Claim:
A system for reproducing digital data, the digital data being present in a first format and in a second format, the system comprising: a read section for reading the digital data; an output section for outputting the digital data; and a control section for controlling the read section and the output section, the control section being operable to support a first mode where the digital data is reproduced according to the first format, and at least a second mode where the digital data is reproduced according to the second format, wherein the control section monitors operability of the digital data reproduction in a selected mode and switches to an operable mode in response to detecting a failure in the selected mode, and wherein in a first session, the control section monitors the operability of a selected mode and upon detection of the failure in the selected mode, the control section stores a failure characteristics in a memory including updating an index table by replacing a reference to an object in a selected format causing the failure by a reference to an object in a different format of the operable mode, and wherein the control section consults the failure characteristics and the updated index table in connection with reproduction of the digital data in a second session in the selected mode using the selected format except where the failure had occured where the different format is used for the reproduction of the digital data in the second session in accordance with the updated index table, wherein the failure characteristics comprises state of the digital data just before the failure.