Method and circuit configuration for reducing flicker in a television set
AssigneesSiemens Aktiengesellschaft, Grundig E.M.V. Electro-Mechanische Versuchsanstalt, Stiftung & Co, KG
InventorsManfred Bromba, Konrad Maul
Life of this patent
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Abstract
A method and a circuit configuration for flicker reduction in a television set include counting the number of partial areas of a field/frame which have been ascertained to be moving, through the use of a motion detector. When a threshold value is exceeded, a changeover is made from a field reproduction sequence with reduced flicker to a field reproduction sequence with reduced flicker and correct motion. The method can be practiced by using standard components.
Claims9
A method for reducing flicker in a television set, which comprises:
- determining motion of contents of a frame to be processed with a device for motion detection, by detecting if motion of the contents of each of a multiplicity of parts of the frame to be processed exists with the device for motion detection, wherein the parts encompass a number of coherent pixels, and
- indicating a motion event for each part with a signal, by counting the motion events frame by frame with a counting device, comparing the number of motion events with a threshold value, carrying out a first frame reproduction sequence with reduced flicker if no motion is detected by executing the first frame reproduction sequence when the threshold value is undershot, and carrying out a second frame reproduction sequence with reduced flicker and correct motion if movement is detected by executing the second frame reproduction sequence when the threshold value is exceeded.
A method for reducing flicker in a television set, which comprises:
- determining motion of contents of a frame to be processed with a device for motion detection, by detecting if motion of the contents of each of a multiplicity of parts of the frame to be processed exists with the device for motion detection, wherein the parts encompass a number of coherent pixels;
- indicating a motion event for each part with a signal, by counting the motion events frame by frame with a counting device, comparing the number of motion events with a threshold value, carrying out a first frame reproduction sequence with reduced flicker if no motion is detected by executing the first frame reproduction sequence when the threshold value is undershot, and carrying out a second frame reproduction sequence with reduced flicker and correct motion if movement is detected by executing the second frame reproduction sequence when the threshold value is exceeded;
- and
- executing a changeover from the first frame reproduction sequence (ABAB) to the second frame reproduction sequence (AABB) at a first threshold value, and executing a changeover from the second frame reproduction sequence (AABB) to the first frame reproduction sequence (ABAB) at a second threshold value, for producing a hysteresis.
A circuit configuration for reducing flicker in a television set, comprising:
- a device for motion detection having an input for a video signal and an output for a signal indicating that motion can be detected for a multiplicity of parts of a frame to be processed, wherein the parts encompass a number of coherent pixels;
- a counting device having an input connected to said device for motion detection for changing a counter reading when a motion event occurs;
- a comparison device having an input connected to said counting device for comparing the counter reading of said counting device with a threshold value;
- and
- a control device being connected to said comparison device for changing over from a first frame reproduction sequence with reduced flicker to a second frame reproduction sequence with reduced flicker and correct motion.
Dependencies are inferred from the claim text.