![]() 1, there is shown a color video processor according to one embodiment of the present invention. ![]() 4 is a block diagram of a modified form of the color video processor of the present invention. 3 is a block diagram of another embodiment of the bit rate converter and 2 is a block diagram of one embodiment of a bit rate converter of FIG. 1 is a block diagram of a color video processor according to the present invention The present invention will be described in detail further with reference to the following drawings, in which: Alternatively, the bit rate converter truncates lower significant bits of the M-bit video signal, leaving N bits, and causes the N bits to dither according to the truncated lower significant bits. Preferably, the bit rate converter truncates lower significant bits of the M-bit video signal, represents the lower significant bits by a different number of binary-1's, and distributes the binary-1's over a varying number of subsequent frames depending on the truncated lower significant bits. The memory delivers one of the output gray levels when the N-bit output video signal of the bit rate converter corresponds to one of the N-bit input gray levels. The output gray levels are distributed on a non-linear curve complementary to a non-linear curve on which gray levels of a display device are distributed. According to the present invention, there is provided a video processor which comprises a bit rate converter for converting an M-bit input video signal to an N-bit output video signal by retaining gray levels of the M-bit input video signal (where, N is smaller than M), and a gamma correction memory in which a plurality of N-bit input gray levels are mapped to a plurality of output gray levels. It is therefore an object of the present invention to provide a video processor which requires less memory and less power for gamma correction while retaining the gray levels of the input video signal. Hence, a significant number of memory cells and power consumption are required for gamma correction. If color generation is required, a set of three color-component video sub-processors are required. If the input video signal is represented by ten bits, the gamma correction table must be implemented with 1,024 address locations or memory cells, each storing a 10-bit input grayscale code and a corresponding 10-bit output grayscale code. ![]() The gamma-corrected video signal is input to a dithering circuit which compresses the number of bits representing the video signal so that it matches the number of bits used in the video display. According to the prior art video processor, the grayscale of an input video signal is gamma-corrected by a gamma correction memory (known as a look-up table) according to the gamma (grayscale) characteristic of a video display. Japanese Patent Publication 1997-50262 discloses a video processor using a dithering technique. The present invention is particularly useful for small screen applications such as mobile terminals. It serves its purpose however and even integrates a basic manual to provide assistance to those who can't figure out how to use it.The present invention relates generally to video processors, and more specifically to a video processor for a display device whose gray levels are distributed on a non-linear curve. Supposed to run all the time and keep an icon in System Tray, Gamma Control is far from being a resource hog, working flawlessly on all Windows versions.Īll things considered, Gamma Control is indeed a handy lightweight utility and it's a shame that it doesn't boast a more appealing interface. Of course, each hotkey is fully configurable, but all of them can only work by pressing CTRL + ALT + a user defined key. There are dedicated keyboard shortcuts to turn gamma up and down, set it to default, quickly switch to two different profiles and force the monitor into sleep mode. The main window of the app is actually so simple that it only displays some basic options, letting you launch the program at Windows startup, run and remain minimized to Tray and save gamma adjustments.īut what's more important is the information that's hiding under the “Options” screen. The program doesn't look good at all, that's true, but behind that ugly interface you shall quickly find the gamma adjustment utilities that could help you a lot in many important moments. Gamma Control is a very easy to use software solution designed to help you adjust gamma settings on the go, using keyboard shortcuts exclusively.Įspecially useful if you're playing games on your computer and you need to adjust gamma without quitting the game, Gamma Control adopts a minimal interface, with just a few options and intuitive tools.
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