Decoder, decoding method, re-encoder, re-encoding method, decoding program and re-encoding program embodied on computer-readable meduim

A decoder for generating decoded information by decoding encoded information containing copy control information that restricts copy of the decoded information obtained by decoding the encoded information, comprising:

• a detection device for detecting a status of encoding in the encoded information based on the encoded information;
• and
• a generation device for generating the decoded information by superimposing status information indicative of the detected status thereon only when the copy control information is an information for permitting the copy to be executed.

A decoder for generating decoded information by decoding encoded information containing copy control information that restricts copy of the decoded information obtained by decoding the encoded information, comprising:

• a detection device for detecting a status of encoding in the encoded information based on the encoded information;
• and
• a generation device for generating the decoded information by superimposing dummy information different from the detected status information indicative of the detected status thereon only when the copy control information is the copy control information for prohibiting the copy from being executed.

A decoding method for generating decoded information by decoding enabled information, comprising:

• a detecting process of detecting a status of encoding in the encoded information based on the encoded information;
• and
• a generating process of generating the decoded information by embedding status information indicative of the detected status in image information contained in the decoded information.

A decoding method for generating decoded information by decoding encoded information containing copy control information that restricts copy of the decoded information obtained by decoding the encoded information, comprising:

• a detecting process of detecting a status of encoding in the encoded information based on the encoded information;
• and
• a generating process of generating the decoded information by superimposing status information indicative of the detected status thereon only when the copy control information is the copy control information for permitting the copy to be executed.

A decoding method for generating decoded information by decoding encoded information containing copy control information that restricts copy of the decoded information obtained by decoding the encoded information, comprising:

• a detecting process of detecting a status of encoding in the encoded information based on the encoded information;
• and
• a generating process of generating the decoded information by superimposing dummy information different from the detected status information indicative of the detected status thereon only when the copy control information is the copy control information for permitting the copy to be executed.

An information recording medium having a decoding program recorded therein so as to be read by a decoding computer included in a decoder that generates decoded information by decoding encoded information, wherein the decoding program causes the decoding computer to function as:

• a detection device for detecting a status of encoding in the encoded information based on the encoded information;
• and
• a generation device for generating the decoded information by embedding status information indicative of the detected status in image information contained in the decoded information.

An information recording medium having a decoding program recorded therein so as to be read by a decoding computer included in a decoder that generates decoded information by decoding encoded information containing copy control information that restricts copy of the decoded information obtained by decoding the encoded information, wherein the decoding program causes the decoding computer to function as:

• a detection device for detecting a status of encoding in the encoded information based on the encoded information;
• and
• a generation device for generating the decoded information by superimposing status information indicative of the detected status thereon only when the copy control information is the copy control information for permitting the copy to be executed.

An information recording medium having a decoding program recorded therein so as to be read by a decoding computer included in a decoder that generates decoded information by decoding encoded information containing copy control information that restricts copy of the decoded information obtained by decoding the encoded information, wherein the decoding program causes the decoding computer to function as:

• a detection device for detecting a status of encoding in the encoded information based on the encoded information;
• and
• a generation device for generating the decoded information by superimposing dummy information indicative of the detected status thereon only when the copy control information is the copy control information for prohibiting the copy from being executed.

A computer data signal embodied in a carrier wave and representing a sequence of instructions, wherein the instructions causes a computer to function as a decoder that generates decoded information by decoding encoded information, the instructions comprising:

• a detection step for detecting a status of encoding in the encoded information based on the encoded information;
• and
• a generation step for generating the decoded information by embedding status information indicative of the detected status in image information contained in the decoded information.

A computer data signal embodied in a carrier wave and representing a sequence of instructions, wherein the instructions causes a computer to function as a decoder that generates decoded information by decoding encoded information containing copy control information that restricts copy of the decoded information obtained by decoding the encoded information, the instructions comprising:

• a detection step for detecting a status of encoding in the encoded information based on the encoded information;
• and
• a generation step for generating the decoded information by superimposing status information indicative of the detected status thereon only when the copy control information is the copy control information for permitting the copy to be executed.

A computer data signal embodied in a carrier wave and representing a sequence of instructions, wherein the instructions causes a computer to function as a decoder that generates decoded information by decoding encoded information containing copy control information that restricts copy of the decoded information obtained by decoding the encoded information, the instructions comprising:

• a detection step for detecting a status of encoding in the encoded information based on the encoded information;
• and
• a generation step for generating the decoded information by superimposing dummy information indicative of the detected status thereon only when the copy control information is the copy control information for prohibiting the copy from being executed.