Phase responsive composite video signal control system

A phase responsive video parameter control system for controlling a video parameter of a portion of a video image represented by a phase-encoded input video signal, said portion of said video image being at least partially defined by a predetermined hue, comprising:

• memory means for storing a plurality of correction signals, each of said correction signals corresponding to a desired value of said video parameter for each one of a plurality of color intervals, each of said color intervals corresponding to one of a plurality of ranges of phase differences between said input video signal and a subcarrier reference signal;
• phase detecting means responsive to said phase-encoded video signal for detecting said predetermined hue by detecting relative phase between said phase encoded video signal and said subcarrier reference signal and for providing a correction value selection signal related to the detected instantaneous hue of said video image;
• correction value selecting means responsive to said correction value selection signal for selecting and retrieving a particular one of said plurality of correction signals associated with a particular one of said color intervals stored in said memory means and for providing said particular correction signal as an output, said particular correction signal being related to a particular desired value of said video parameter for said detected instantaneous hue;
• and
• means responsive to said particular correction signal for controlling said video parameter to said particular desired value.

A hue responsive video parameter control system for controlling a video parameter of a portion of a video image, said portion of said video image being at least partially defined by a predetermined hue, comprising:

• operator hue selection means for selecting a particular predetermined hue of said video image in response to actuation by an operator;
• hue detecting means responsive to an input video signal to detect said selected particular predetermined hue and to provide a hue detect signal;
• memory means for storing a plurality of correction signals, each one of said plurality of correction signals corresponding to a different one of a plurality of predetermined hues;
• means responsive to said hue detect signal for retrieving a correction signal related to a desired value of a video parameter for said selected particular predetermined hue from said memory means;
• and
• means for applying said retrieved correction signal to said input video signal to correct said video parameter to said desired value.

A phase responsive video signal correction system for correcting a video parameter of an image represented by a color video signal, comprising:

• phase detecting means responsive to detect relative phase between a phase encoded component of an uncorrected color video signal and a reference signal;
• correction signal means for generating a plurality of correction signals, each of said correction signals being related to a different one of a plurality of ranges of relative phase between said uncorrected color video signal and said reference signal;
• correction signal selecting means responsive to said detected relative phase detected by said detecting means for selecting a particular one of said correction signals corresponding to one of said ranges of relative phase;
• and
• means responsive to said selected correction signal for correcting said uncorrected color video signal to provide a corrected output color video signal.

A video signal color correction system for correcting a video parameter of an image represented by an input color video signal, comprising:

• means for defining a plurality of color control ranges, each of said color control ranges comprising those hues of the visible color spectrum which fall within a region of the spectrum defined by a first boundary of a predetermined first hue and a second boundary of a predetermined second hue;
• a single detecting means for detecting when said input color video signals have hues within one of said color control ranges and responsive to provide a hue detect signal;
• operator control means for providing color control signals indicative of an adjustment of a selected video parameter related to hues within said color control ranges;
• and
• means responsive to said hue detect signal for applying said color control signals to said input color video signal.

A video signal color correction system for correcting a video parameter of an image represented by a color video signal, comprising:

• memory means for storing a plurality of correction signals, each of said correction signals corresponding to a color correction for a video parameter having a hue within a predetermined color interval;
• means responsive to said input color video signal for selecting one of said correction signals stored in said memory means as a function of the instantaneous hue of the video image;
• and
• correction means responsive to said selected one of said correction signals for correcting said input color video signal to provide a color corrected video output signal.

A video signal color correction system for correcting a video parameter of an image represented by an input color video signal, comprising:

• means for providing a plurality of color correction regions on a vectorscope representation of said color video signal;
• memory means for storing a selectively variable correction signal corresponding to corrections for a video parameter;
• means for detecting when said color video signal is within one of said color correction regions;
• means for retrieving said correction signal from said memory means in response to said detecting means;
• and
• correction means responsive to said retrieved correction signal for correcting said input color video signal to provide a corrected video output signal.

A phase responsive luminance control system for controlling the luminance of a portion of a video image represented by a phase-encoded video signal, said portion of said video image being at least partially defined by a predetermined hue, comprising:

• single phase detecting means responsive to detect said predetermined hue by detecting relative phase between said phase-encoded video signal and a reference signal in each one of a plurality of ranges of phases representable by said phase-encoded video signal;
• luminance controlling means responsive [responsive] to said detected relative phase for [generating ] selecting one of a plurality of correction [signal] signals related to said detected relative phase;
• and
• means responsive to said selected correction signal for controlling luminance in a video signal corresponding to said phase encoded video signal.

A phase responsive chrominance control system for controlling the chrominance of a portion of a video image represented by a chrominance signal, said portion of said video image being at least partially defined by a predetermined hue, comprising:

• single phase detecting means responsive to detect said predetermined hue by detecting relative phase between said chrominance signal and a reference signal in each one of a plurality of ranges of phases representable by said chrominance signal;
• correction signal means responsive to said detected relative phase for [generating ] selecting one of a plurality of correction [signal] signals related to said detected relative phase;
• and
• means responsive to said selected correction signal for controlling said chrominance signal to provide a corrected chrominance signal.

A phase responsive video signal correction system for correcting a video parameter of an image represented by a composite video signal, comprising:

• phase detecting means responsive to detect relative phase between a phase encoded component of an uncorrected composite video signal and a reference signal;
• correction signal means responsive to said detected relative phase for generating a correction signal related to said detected relative phase;
• and
• means responsive to said correction signal for selectively correcting a luminance portion of a particular hue represented by said uncorrected composite video signal to provide a corrected composite video signal.

A phase responsive video parameter control system for controlling a video parameter of a portion of a video image represented by a phase-encoded video signal, said portion of said video image being at least partially defined by a predetermined hue, comprising:

• memory means for storing a plurality of correction signals, each of said correction signals corresponding to a desired value of said video parameter for a particular instantaneous hue;
• phase detecting means responsive to said phase-encoded video signal for detecting said predetermined hue by detecting relative phase between said phase encoded video signal and a subcarrier reference signal and for providing a correction value selection signal related to a detected instantaneous hue of said video image;
• means for dividing each cycle of said subcarrier reference signal into a plurality of discrete color intervals, each of said color intervals being related to a particular one of said correction signals stored in said memory means;
• correction value selecting means responsive to said correction value selection signal for selecting and retrieving a particular one of said plurality of correction signals associated with a particular one of said color intervals stored in said memory means and for providing said particular correction signal as an output, said particular correction signal being related to a particular desired value of said video parameter for said detected instantaneous hue;
• and
• means responsive to said particular correction signal for controlling said video parameter to said particular desired value.

A phase responsive video parameter control system for controlling a video parameter of a portion of a video image represented by a phase-encoded video signal, said portion of said video image being at least partially defined by a predetermined hue, comprising:

• memory means for storing a plurality of correction signals, each of said correction signals corresponding to a desired value of said video parameter for a particular instantaneous hue;
• phase detecting means responsive to said phase-encoded video signal for detecting said predetermined hue by detecting relative phase between said phase encoded video signal and a subcarrier reference signal and for providing a correction value selection signal related to a detected instantaneous hue of said video image;
• correction value selecting means responsive to said correction value selection signal for selecting and retrieving a particular one of said plurality of correction signals stored in said memory means and for providing said particular correction signal as an output, said particular correction signal being related to a particular desired value of said video parameter for said detected instantaneous hue;
• means responsive to said particular correction signal for controlling said video parameter to said particular desired value;
• operator control means for providing updated correction signals in response to actuation by an operator to indicate a desired change in control;
• and
• means for periodically storing said updated correction signals in said memory means during an external access mode.

A phase responsive video parameter control system for controlling a video parameter of a portion of a video image, said portion of said video image being at least partially defined by a predetermined hue, comprising:

• means for developing a phase-encoded video signal representative of a video image to be controlled;
• operator hue selection means for selecting a particular predetermined hue of said video image in response to actuation by an operator;
• phase detecting means responsive to said phase-encoded video signal to detect said selected particular predetermined hue by detecting relative phase between said phase-encoded video signal and a subcarrier reference signal;
• means responsive to said detected relative phase for generating a correction signal related to a desired value of a video parameter for said selected particular predetermined hue;
• memory means for storing a plurality of correction signals, each one of said plurality of correction signals corresponding to a different one of a plurality of predetermined hues;
• second memory means for storing a plurality of sets of said correction signals, each one of said sets corresponding to a particular plurality of said correction signals associated with a particular video image;
• and
• means responsive to said correction signal for correcting said video parameter to said desired value.

A phase responsive video parameter control system for controlling a video parameter of a portion of a video image, said portion of said video image being at least partially defined by a predetermined hue, comprising:

• means for developing a phase-encoded video signal representative of a video image to be controlled;
• operator hue selection means for selecting a particular predetermined hue of said video image in response to actuation by an operator;
• phase detecting means responsive to said phase-encoded video signal to detect said selected particular predetermined hue by detecting relative phase between said phase-encoded video signal and a subcarrier reference signal;
• memory means for storing a plurality of sets of a plurality of correction signals, each one of said sets being associated with a different video image, said memory means being responsive to provide a particular one of said sets of correction signals in response to receipt of a scene change signal indicative of a change in video images;
• means responsive to said detected relative phase for retrieving from said memory means one of said correction signals related to a desired value of a video parameter for said selected particular predetermined hue;
• and
• means responsive to said correction signal for correcting said video parameter to said desired value.

A phase responsive video signal correction system for correcting a video parameter of an image represented by a composite video signal, comprising:

• phase detecting means responsive to detect relative phase between a phase encoded component of an uncorrected composite video signal and a reference signal in each one of a plurality of ranges of phases representable by said composite video signal;
• means for storing a plurality of correction signals, each of said correction signals corresponding to one of said plurality of ranges of phases;
• correction signal means responsive to said detected relative phase for selecting one of said correction signals stored in said storing means;
• and
• means responsive to said selected one of said correction signals for correcting said uncorrected composite video signal to provide a corrected composite video signal.

The system of claim 74, wherein said dividing means comprises:

• phase locked loop means for locking to the frequency of said reference signal, said phase locked loop including a voltage controlled oscillator having an output signal having a frequency at least about N times the frequency of said reference signal, N being the number of discrete color intervals;
• and
• digital counter means responsive to said output signal of said oscillator to count to N once each cycle of said reference signal. The system of claim 75, wherein said phase detecting means provides a correction value selecting signal,
• wherein said storing means is responsive to said dividing means to repetitively provide said plurality of said correction signals in a predetermined sequence corresponding to said color intervals, and
• wherein said correction signal means comprises latching means responsive to said correction value selecting signal to temporarily store a particular one of said correction signals being provided by said storing means at a time of occurrence of said correction value selection signal.