Chroma and luminance signal generator for video games
AssigneeThe Magnavox Company
InventorsJeffrey Reed Lukkarila, Kenneth D. Liston, Jr.
Life of this patent
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Abstract
Apparatus is described for generating simultaneously luminance and chroma signals in a video game for use with a standard NTSC television receiver. Game object color can be changed on the occurrence of a game event. Independent control over the brightness and hue for each marker is provided.
Claims7
In a video game, having a game marker generator for generating a video signal for representing a game marker to be displayed on a television receiver, a luminance and chroma signal generator comprising:
- a. an oscillator means having a signal at a frequency of substantially 3.579545 MHz;
- b. means for combining said oscillator signal with a d.c. voltage, said d.c. voltage representing a luminance level;
- and
- c. means for switching said combined oscillator signal and d.c. voltage combination in response to said video signal whereby said switched signal comprises a chroma and luminance signal.
In a video game wherein a plurality of game markers are represented by a plurality of video signals referenced to vertical and horizontal sync pulses, a circuit for providing chroma and luminance signals for each game marker comprising:
- a. a 3.579545 MHz oscillator having a plurality of output signals, each of said output signals having a different phase;
- b. means for combining a d.c. voltage with each of said output signals to provide a plurality of combined signals whereby said d.c. voltage establishes the luminance level and said output signal establishes the color of a game marker;
- and
- c. means for switching each of said combined signals in response to each of said video signals, whereby each of said switched signals comprises a chroma and luminance signal for each of said video signals.
In a video game having at least one game marker generator, said game marker generator producing a video signal for determining the location and geometry of a game marker, a chroma and luminance signal generator comprising:
- a. means for generating a plurality of signals having a frequency of 3.579545 MHz, each of said signals having a different phase;
- b. means for combining each of said signals with a d.c. voltage;
- c. a plurality of switches for controlling each of said oscillator signals having a d.c. voltage associated therewith;
- and
- d. means for selectively applying said video signal to one of said switches whereby said switch is activated in response to said video signal.
Dependencies are inferred from the claim text.