| 摘要 |
PROBLEM TO BE SOLVED: To provide a process for reducing noise and temporal artifacts (e.g., walking LEDs) by applying temporal filtering to rear modulation signals of a sequence of video frames.SOLUTION: A flare rate and a dimming rate are calculated for a current frame in the video. If a flare rate threshold is exceeded, intensity of a backlight is limited to a predetermined flare rate. If a dimming rate threshold is exceeded, the intensity of the backlight is limited to a predetermined dimming rate. The limitations are applied, for example, on an element-by-element basis. In the event of a scene change, the limitations do not need to be applied. A forward modulation signal is calculated by taking into account any applied backlight limitations. |
