Method, apparatus and system for transmitting and receiving an image signal having superimposed information and for extracting information superimposed on an image signal

A method of extracting additional information superimposed on an image signal which includes a plurality of uniform units in a time axis direction where the additional information is superimposed on the uniform units of the image signal in a time axis direction using a first code by allocating one chip of said first code to N uniform units of the image signal, where N is an integer of at least 1, comprising the steps of:

• generating a second code composed of a plurality of chips;
• and
• extracting the additional information superimposed on the image signal by allocating one chip of the second code to N uniform units of the image signal corresponding to a section on which the additional information is superimposed and by executing inverse processing using said second code.

An apparatus for superimposing additional information on an image signal which includes a plurality of uniform units in a time axis direction, said apparatus comprising:

• code generating means for generating a code composed of a plurality of chips;
• and
• superimposing means for superimposing said additional information on the uniform units of said image signal in a time axis direction using said code by allocating one chip of said code to N uniform units of the image signal, where N is an integer of at least 1.

An apparatus for extracting additional information superimposed on an image signal which includes a plurality of uniform units in a time axis direction where the additional information is superimposed on the uniform units of said image signal in a time axis direction using a first code by allocating one chip of the first code to N uniform units of the image signal, where N is an integer of at least 1, said apparatus comprising:

• code generating means for generating a second code;
• and
• inverse processing means for extracting said additional information superimposed on said image signal by executing inverse processing using said second code by allocating one chip of said second code to N uniform units corresponding to a section of an image signal on which said additional information is superimposed.

An image signal recording medium having recorded thereon an image signal on which additional information that is processed with a code composed of a plurality of chips, wherein one chip of the code is allocated to N uniform units of the image signal, where N is an integer of at least 1, and the code is superimposed on uniform units of said image signal in a time axis direction.

A method for superimposing additional information on an image signal which includes a plurality of uniform units in a time axis direction, where said uniform units are composed of horizontal direction units and vertical direction units, said method comprising the steps of:

• generating a code which has a period corresponding to a predetermined section within one horizontal direction unit of said uniform unit, for superimposing said additional information on said image signal;
• and
• superimposing said additional information on said predetermined section within said one horizontal direction unit of a plurality of uniform units of said image signal in a time axis direction repeatedly using said code.

A method for extracting additional information superimposed on an image signal where the additional information is processed in a predetermined section within one horizontal direction unit of a uniform unit of the image signal and is repeatedly superimposed to a horizontal direction unit of a plurality of uniform units, comprising the steps of:

• generating a code having a period corresponding to a predetermined section within one horizontal direction unit on which said processed additional information is superimposed, and
• repeatedly extracting said additional information superimposed on said image signal by executing inverse processing using said code.

An apparatus for superimposing additional information on an image signal which includes a plurality of uniform units in a time axis direction, where said uniform units are composed of horizontal direction units and vertical direction units comprising:

• code generating means for generating a code having a period corresponding to a predetermined section within one horizontal direction unit of the uniform unit of the image signal, and
• superimposing means for repeatedly superimposing said additional information on said predetermined section within one horizontal direction unit of a plurality of uniform units of the image signal using the code.

An apparatus for extracting additional information superimposed on an image signal where the additional information is processed in a predetermined section in one horizontal direction unit of a uniform unit of the image signal and is superimposed for a horizontal direction unit of a plurality of the uniform units, comprising:

• code generating means for generating a code having a period corresponding to the predetermined section within one horizontal direction unit for inverse processing said predetermined section in one horizontal direction unit of said image signal on which said additional information is superimposed, and
• inverse processing means for repeatedly extracting said additional information superimposed on said image signal by executing inverse processing using said code.

An image signal recording medium having recorded thereon an image signal on which additional information that is processed in a predetermined section within one horizontal direction unit of a uniform unit of the image signal is repeatedly superimposed on a horizontal direction unit of a plurality of uniform units of the image signal.

A method for superimposing additional information on an image signal which includes a plurality of uniform units in a time axis direction, where said uniform units are composed of horizontal direction units and vertical direction units, the method comprising the steps of:

• generating a code having a period corresponding to a predetermined section within one vertical direction unit of said uniform unit, for superimposing said additional information on said image signal;
• and
• superimposing repeatedly said additional information on said predetermined section within one vertical direction unit of a plurality of uniform units of said image signal using said code.

A method for extracting additional information from an image signal having the additional information superimposed in a predetermined section within one vertical direction unit with a first code repeatedly, wherein said predetermined section within one vertical direction unit is designated as a period of said first code, the method comprising the steps of:

• generating a second code for inverse processing said predetermined section within one vertical direction unit corresponding to a section on which said processed additional information is superimposed, wherein said predetermined section within one vertical direction unit is designated as a period of the second code, and
• extracting repeatedly said additional information superimposed on said image signal by executing inverse processing using said second code for inverse processing.

An apparatus for superimposing additional information on an image signal which includes a plurality of uniform units in a time axis direction, said apparatus comprising:

• code generating means for generating a code having a period corresponding to a predetermined section within one vertical direction unit of said uniform unit;
• and
• superimposing means for repeatedly superimposing additional information on said predetermined section within one vertical direction unit of a plurality of uniform units of said image signal using the code.

An apparatus for extracting additional information superimposed on an image signal having the additional information superimposed in a predetermined section within one vertical direction unit of a uniform unit of the image signal with a first code repeatedly, wherein a predetermined section within one vertical direction unit is designated as one period of the first code, the method comprising:

• processing means for generating a second code for inverse processing one period of the predetermined section within one vertical direction unit on which said additional information is superimposed, and
• inverse processing means for extracting repeatedly said additional information superimposed on said image signal by executing inverse processing using said second code.

An image signal recording medium having recorded thereon an image signal on which additional information, processed in a predetermined section within one vertical direction unit of a uniform unit of the image signal, with said predetermined section within one vertical direction unit designated as one period of the code used for processing, is superimposed.