Transparent embedment of data in a video signal

An apparatus for transparently encoding data within a video signal comprising:

• means for generating from the data to be encoded and video timing signals associated with the video signal a spread spectrum randomized binary pattern;
• means for modulating the spread spectrum randomized binary pattern onto a carrier frequency to produce a subliminal data signal;
• means for alternating the phase of the subliminal data signal on alternate lines of each frame of the video signal such that each pair of contiguous lines has the same data but inverted in polarity;
• and
• means for combining the subliminal data signal with the video signal to produce an output video signal having the data transparently encoded within the video signal.

An apparatus for transparently encoding data within a video signal comprising:

• means for generating from the data to be encoded and video timing signals associated with the video signal a spread spectrum randomized binary pattern;
• means for modulating the spread spectrum randomized binary pattern onto a carrier frequency to produce a subliminal data signal;
• means for amplitude modulating the subliminal data signal with a gain signal based upon a human visual model;
• and
• means for combining the subliminal data signal with the video signal to produce an output video signal having the data transparently encoded within the video signal.

A method of transparently encoding data within a video signal comprising the steps of:

• generating from the data to be encoded and video timing signals associated with the video signal a spread spectrum, two-dimensional randomized binary noise-like pattern;
• modulating the randomized binary pattern onto a carrier frequency to produce a subliminal data signal;
• and
• combining the subliminal data signal with the video signal to produce an output video signal having the data transparently encoded within the video signal.

A method of transparently encoding data within a video signal comprising the steps of:

• generating from the data to be encoded and video timing signals associated with the video signal a spread spectrum randomized binary pattern;
• modulating the spread spectrum randomized binary pattern onto a carrier frequency to produce a subliminal data signal;
• alternating the phase of the subliminal data signal on alternate lines of each frame of the video signal such that each pair of contiguous lines has the same data but inverted in polarity;
• and
• combining the subliminal data signal with the video signal to produce an output video signal having the data transparently encoded within the video signal.

A method of transparently encoding data within a video signal comprising the steps of:

• generating from the data to be encoded and video timing signals associated with the video signal a spread spectrum randomized binary pattern;
• modulating the spread spectrum randomized binary pattern onto a carrier frequency to produce a subliminal data signal;
• amplitude modulating the subliminal data signal with a gain signal based upon a human visual model;
• and
• combining the subliminal data signal with the video signal to produce an output video signal having the data transparently encoded within the video signal.

An apparatus for transparently embedding data within a video signal comprising:

• a pattern generator having as inputs timing signals associated with the video signal and the data to be embedded and producing as an output a spread spectrum, two-dimensional randomized pattern noise-like signal;
• a modulator having as inputs the randomized pattern signal and a carrier frequency synchronized with the randomized pattern signal and producing as an output a subliminal data signal;
• and
• a combiner having as inputs the subliminal data signal and the video signal and producing as an output a transparently embedded data video signal.

An apparatus for transparently embedding data within a video signal comprising:

• a pattern generator having as inputs timing signals associated with the video signal and the data to be embedded and producing as an output a spread spectrum randomized pattern signal;
• a modulator having as inputs the spread spectrum randomized binary signal and a carrier frequency synchronized with the spread spectrum randomized pattern signal and producing as an output a subliminal data signal;
• a phase alternator circuit having as inputs a specific one of the video timing signals and a component of the subliminal data signal and having as an output a signal that produces inversion of the phase of the subliminal data signal on alternate lines of each frame of the video signal such that each pair of contiguous lines has the same data but inverted in polarity;
• and
• a combiner having as inputs the subliminal data signal and the video signal and producing as an output a transparently embedded data video signal.

An apparatus for transparently encoding data within a video signal comprising:

• a pattern generator having as inputs timing signals associated with the video signal and the data to be embedded and producing as an output a spread spectrum randomized pattern signal;
• a modulator having as inputs the spread spectrum randomized pattern signal and a carrier frequency synchronized with the spread spectrum randomized pattern signal and producing as an output a subliminal data signal;
• a softening filter having as an input the subliminal data signal and producing as an output a filtered subliminal data signal;
• and
• a combiner having as inputs the filtered subliminal data signal and the video signal and producing as an output a transparently embedded data video signal.

An apparatus for extracting transparently embedded data from a video signal where the embedded data is a spread spectrum randomized binary pattern modulated onto a carrier frequency that is repeated on alternate lines of each frame of the video signal with opposite phase comprising:

• means for filtering the video signal to enhance the embedded data with respect to the video content of the video signal;
• means for demodulating the filtered video signal about the carrier frequency with a pseudo-random binary sequence modulated carrier frequency to produce a broadband video signal;
• and
• means for correlating the broadband video signal with a plurality of binary patterns to recover the embedded data.

A method of extracting transparently embedded data from a video signal where the embedded data is a spread spectrum randomized binary pattern modulated onto a carrier frequency that is repeated on alternate lines of each frame of the video signal with opposite phase comprising the steps of:

• filtering the video signal to enhance the embedded data with respect to the video content of the video signal;
• demodulating the video signal about the carrier frequency with a pseudo-random binary sequence modulated carrier frequency to produce a broadband video signal;
• and
• correlating the broadband video signal with a plurality of binary patterns to recover the embedded data.

An apparatus for extracting transparently embedded data from a video signal where the embedded data is a spread spectrum randomized binary pattern modulated onto a carrier frequency that is the same on alternate lines of each frame of the video signal with opposite phase comprising:

• a filter having as an input the video signal and producing as an output a filtered video signal, the filter enhancing the embedded data with respect to the video content of the video signal;
• a demodulator having as inputs a pseudo-random binary sequence modulated carrier frequency and the filtered video signal and producing as an output a broadband video signal;
• and
• a correlation receiver having as inputs the broadband video signal and timing signals associated with the video signal for comparing the broadband video signal with a plurality of binary patterns to recover as an output the embedded data.