Video signal processing device and video signal processing method
AssigneeKabushiki Kaisha Toshiba
InventorHirotoshi Miyazawa
Life of this patent
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Abstract
According to one embodiment, a video signal processing device includes an input unit to which a brightness signal is input, a high band emphasis unit that extracts a first high band component from the brightness signal and outputs an output signal by adding the first high band component to the brightness signal, an acquisition unit that acquires a first histogram data of brightness levels for one frame of the input brightness signal, and a first processing unit that performs a high band emphasis processing on the input brightness signal based on the first histogram data.
Claims19
A video signal processing device comprising:
- an input unit to which a brightness signal is input;
- a high band emphasis unit that extracts a first high band component from the brightness signal and outputs an output signal by adding the first high band component to the brightness signal;
- an acquisition unit that acquires a first histogram data of brightness levels for one frame of the input brightness signal;
- and
- a first processing unit that performs a high band emphasis processing on the input brightness signal based on the first histogram data, the first processing unit including a high band emphasis table creation unit that outputs a second histogram data by performing a frequency conversion processing on the first histogram data, corrects a high band emphasis amount preset for each of the brightness levels based on the second histogram data and stores the high band emphasis amount into an LUT.
A video signal processing method comprising:
- (a) inputting one frame of a brightness signal;
- (b) acquiring histogram data of brightness levels for the brightness signal;
- (c) correcting the histogram data by:
- (c-1) performing frequency conversion processing on the histogram data to disperse each of the values into a predetermined range of the brightness levels if each of the values have a value greater than a predetermined value;
- (d) creating a high band emphasis processing table for performing a high band emphasis processing on the brightness signal based on the histogram data;
- and
- (e) performing the high band emphasis processing on the brightness signal based on the high band emphasis processing table.
A video signal processing device comprising:
- an input unit that receives one frame of a brightness signal;
- a first calculation unit that extracts a high band component from the brightness signal and calculates an operation amount for a high band emphasis processing based on the high band component;
- an acquisition unit that acquires a first histogram data of brightness levels for the brightness signal;
- a second calculation unit that calculates a correction amount for the operation amount based on the first histogram data;
- a determination unit that determines an high band emphasis amount by correcting the operation amount based on the correction amount;
- and
- a high band emphasis unit that processes the high band emphasis processing based on the high band emphasis amount.
Dependencies are inferred from the claim text.