Embedding supplemental data in an encoded signal, such as audio / video watermarks

A method of extracting supplemental data from a received encoded signal in which selected predetermined samples are replaced by samples of the supplemental data, and including the step of selecting the samples in response to a predetermined selection signal.

A method of extracting supplemental data from a received encoded signal, comprising the steps of:

• encoding the original signal in accordance with a given encoding process including the step of feeding back the received encoded signal to control the encoding;
• and
• comparing the encoded original signal and the received encoded signal, the difference between the signals representing the supplemental data.

An arrangement for extracting supplemental data from a received encoded signal in which selected predetermined samples are replaced by samples of the supplemental data, comprising:

• register means for selecting the samples in response to a predetermined selection signal.

An arrangement for extracting supplemental data from a received encoded signal, comprising:

• encoder means for encoding the original signal without the supplemental data and using the received encoded signal containing the supplemental data to control the encoding;
• and
• means for comparing the encoded original signal with the received encoded signal, the difference between the signals representing the supplemental data.

An encoded signal with embedded supplemental data, in which selected bits of the encoded signal have been inverted to represent the supplemental data with the number of bit periods between successive inverted bits representing the embedded data.

A method of embedding supplemental data in an signal, comprising the steps of:

• encoding the signal in accordance with a given encoding process including feeding back the encoded signal to control the encoding;
• and
• modifying the signal to represent the supplemental data after encoding the signal and before feeding back the encoded signal to control the encoding.

A method of embedding supplemental data in a signal, comprising the steps of:

• unity bit encoding the signal in accordance with a given unity bit encoding process including feeding back the encoded signal to control the encoding;
• and
• modifying the signal to represent the supplemental data before feeding back the signal to control the encoding.

A method of embedding unity bit supplemental data in a signal, comprising the steps of:

• encoding the signal in accordance with a given encoding process including feeding back the encoded signal to control the encoding;
• and
• combining unitary bit supplemental data into the signal before feeding the signal back to control the encoding.

A method of embedding supplemental data in a signal, comprising the steps of:

• encoding the signal in accordance with a given encoding process;
• combining supplemental data into the signal;
• continuously feeding the combined and encoded signal containing the supplemental data back to the encoding process to control the encoding.