Digital video signal processing device and TV camera device arranged to use it
AssigneeHitachi Denshi Kabushiki Kaisha
InventorsNobuo Murata, Yasuo Yoshimura
Life of this patent
Estimating the term…
Abstract
A digital video signal processing device for clipping a digital video signal to keep the signal at a predetermined level, includes an interpolation data signal generating unit for predicting video signal levels between adjacent sampling points for generating an interpolation data signal, clipping units for clipping the sampled video signal and the interpolation data signal at their levels, and a synthesizing unit for performing a predictive coding operation with respect to at least any one of the clipped video signal and the interpolation data signal and synthesizing these signals with each other.
Claims7
A TV camera device comprising:
- digital contour emphasis means for generating a digital contour emphasis signal from digitized video signals;
- first clipping means for clipping said digital contour emphasis signal to a predetermined upper limit value or lower limit value and providing an output thereof;
- interpolation data generating means for generating interpolation data at an intermediate point between adjacent sampling points from said digital contour emphasis signal;
- second clipping means for clipping said interpolation data to said predetermined upper limit value or lower limit value and providing an output thereof;
- first adding means for adding one of the outputs from said first and second clipping means to a G signal of said digitized video signals;
- and
- second adding means for adding the other of the outputs from said first and second clipping means to R and B signals of said digitized video signals.
A digital video signal processing device for clipping a digital contour emphasis signal generated from inputted digitized video signals so that said digitized video signals are kept within a predetermined level, said digital video signal processing device comprising:
- digital contour emphasis means for receiving said digitized video signals and for generating a digital contour emphasis signal;
- first clipping means coupled with said digital contour emphasis means for clipping said digital contour emphasis signal and providing an output thereof;
- interpolation data generating means coupled with said digital contour emphasis means for generating interpolation data at an intermediate point between adjacent sampling points from said digital contour emphasis signal;
- second clipping means coupled with said interpolation data generating means for clipping said interpolation data and providing an output thereof;
- first adding means coupled with one of said first and second clipping means for adding one of said outputs from said first and second clipping means to a G signal of said inputted digitized video signals;
- second adding means coupled with another one of said first and second clipping means for adding another one of said outputs from said first and second clipping means to R and B signals of said inputted digitized video signals;
- and
- matrix means coupled with said first and second adding means for mixing the outputs from said first and second adding means together.
Dependencies are inferred from the claim text.