Video signal transmission method, superimposed information extraction method, video signal output device, video signal recording device, and video signal recording medium

The superimposing device for detecting an additional information from a signal on which said additional information is superimposed intermittently with predetermined timing, said detecting device comprising:

• generating means for generating a first code for a first region of said signal on which said additional information is superimposed and for generating a second code having a polarity different from a polarity of said first code for a second region of signal on which said additional information is not superimposed;
• and
• detecting means for detecting said additional information superimposed on said signal using said first code to said first region of signal and using said second code to detect said second region of signal.

A detecting device for detecting an additional information from a signal on which said additional information is superimposed intermittently with predetermined timing, said detecting device comprising:

• determining means for determining a difference between a first region of said signal on which said additional information is superimposed, and a second region of said signal on which said additional information is not superimposed;
• and
• detecting means for detecting said additional information superimposed on said signal by using said difference determined by said determining means.

A detecting device for detecting an additional information from a signal on which said additional information is superimposed intermittently with predetermined timing, said detecting device comprising:

• generating means for generating a first code for a first region of said signal on which said additional information is superimposed and for generating a second code for a second region of signal on which said additional information is not superimposed;
• and
• detecting means for detecting said additional information superimposed in said signal using said first code applied to said first region of signal and using said second code applied to said second region of signal.

A superimposing method for superimposing additional information on a signal, said superimposing method comprising the steps of:

• generating region information which represents first regions of said signal on which said additional information is superimposed and second regions of the signal on which said additional information is not superimposed;
• and
• superimposing said additional information on said first regions of said signal based on said region information.

A detecting method for detecting an additional information from a signal on which said additional information is superimposed intermittently with predetermined timing, said detecting method comprising the steps of:

• generating a first code for a first region of a signal on which said additional information is superimposed and generating a second code having a polarity different than a polarity of said first code for a second region of the signal on which said additional information is not superimposed;
• and
• detecting said additional information superimposed in said signal using said first code to said first region of signal and using said second code to said second region of signal.

A detecting method for detecting an additional information from a signal on which said additional information is superimposed intermittently with predetermined timing, said detecting method comprising the step of:

• determining a difference between a first region of said signal on which said additional information is superimposed and a second region of said signal on which said additional information is not superimposed;
• and
• detecting said additional information superimposed in said signal by using said difference determined in said step of determining.

A detecting device for detecting an additional information from a signal on which said additional information is superimposed intermittently with predetermined timing, said detecting device comprising:

• generating means for generating a first code for a first region of said signal on which said additional information is superimposed and for generating a second code for a second region of said signal on which said additional information is not superimposed;
• and
• detecting means for detecting said additional information superimposed on said signal using said first code applied to said first region of signal and using said second code applied to said second region of signal.