Patent ID: 7327648

Claim:
A player for playing an optical disc with a first side and a second side, wherein data is arranged on the data layer of said first side along a first spiral oriented in a first direction when viewed on said first side, and data is arranged on the data layer of said second side along a second spiral oriented in a direction opposite that of said first spiral when viewed on said second side; said player comprising: a microprocessor determining a direction of rotation for the disc that allows data to be read from either side of the disc, said microprocessor generating corresponding microprocessor commands, by analyzing the waveshape of the signals on the disc; a motor responsive to said microprocessor commands to rotate the disc in said direction of rotation; and a read head disposed adjacent to said first side for reading data; wherein said microprocessor includes an A/D converter receiving an analog signal from said read head representing said waveshape and converting said analog signal into a digital stream and a data decoder receiving said digital stream and attempting to convert said digital data stream into recognized data using a first set of parameters P 1 , and generating an output indicative of whether said attempt is successful; and wherein said microprocessor generates a first microprocessor command if said output indicates that said data decoder was successful in generating recognized data and a second microprocessor command if said output indicates that said data decoder was not successful in generating recognized data.