Method and apparatus for digitally processing gamma pedestal and gain

DETAILED DESCRIPTION What is claimed is: 1.
A method of processing video signals, comprising: reading video signals; providing in a memory data for correcting gamma, black level and white level of said video signals by the steps of: reading desired black level, white level and gamma; setting the data in said memory such that memory locations below the desired black level equal a preselected quantity; setting the data in said memory such that memory locations above the desired white level equal a preselected quantity; computing for each of the memory locations between said desired black level and white level data representative of gamma correction; and applying video signals to said memory to produce video signals corrected for gamma, black level and white level.
2.
An apparatus for gamma correcting digital video data and for adjusting a desired black level, white level and gamma comprising: storage means responsive to said video data having a plurality of memory locations responsive to digital video signals for storing data at address locations indicative of gamma correction, black level and white level for said digital video signals; control means coupled to said memory for changing said stored data in response to desired changes in gamma, black level and white level; said storage means providing at its output video signals which are corrected and adjusted in accordance with the data stored in the memory locations thereof.
3.
The apparatus of claim 2, wherein said control means provides preselected data to memory locations in said storage means below the desired black level and above the desired white level and computes data for the memory locations for correcting said video signals in accordance with the computed data.
4.
An apparatus for correcting input video signals comprising: selection means for enabling an operator to select values of gamma, a black level and a white level; control means responsive to operator selected values of gamma, black level and white level for controlling the correction of said input video signals, including calculating means for calculating correction values for said input video signals based upon said operator selected values of gamma, black level and white level; and memory means coupled to said control means for receiving said correction values and said input video signals and for outputting said input video signals modified in accordance with said correcting values