Patent ID: 7577843

Claim:
A method for controlling contents data, said method comprising: obtaining the contents data by an input unit in a detection device including a storage device for recording a new copy of the contents data; detecting, by a processing unit in the detection device, first control information concerning control of contents from the contents data; detecting, by the processing unit, second control information concerning the control of the contents from the contents data, the second control information being added to the contents data in a manner different from the first control information; determining, by the processing unit, consistency between the control of the first control information and the control of the second control information; and executing, by the processing unit, the control of the contents on the basis of the first control information or the second control information, in accordance with results of the determination on the consistency, wherein: the executing step by the processing unit includes recording a new copy of the received contents data in the storage device in accordance with the determination results; an information amount of the first control information differs from an information amount of the second control information; the second control information is quantized control information of 1 bit; and in connection with the second control information of 1 bit, one bit value of 1-bit values is allocated to a record control required for control of the contents, another bit value is allocated to other record controls by permitting duplication in allocation, and as a result of the determination on consistency between the first control information and the second control information of 1 bit, the control of the contents is executed based on the first control information.