Encoding system for error diffusion dithering
First Claim
1. A color depth adjustment unit for converting an input video signal into an output video signal, wherein the input video signal has a plurality of input pixels having a plurality of input color portions of an input color size, and wherein the output video signal has a plurality of output pixels having a plurality of output color portions of an output color size;
- the color depth adjustment unit comprising;
an error diffusion unit coupled to receive the input video signal and to generate the output video signal;
a first error buffer coupled to the error diffusion unit and having a plurality of error memory units having a plurality of color portions of an error buffer size;
a second error buffer coupled to the error diffusion unit; and
wherein the error buffer size is less than the input color size.
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Abstract
An error diffusion system in accordance with an embodiment of the present invention adjusts the color depth of an RGB signal using error diffusion without the using an expensive frame buffer. Specifically, a color depth adjustment unit in accordance with the present invention can perform error diffusion on an RGB signal using two error buffers, which are smaller in memory size than typical line buffers that would be used for the video stream.
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Citations
15 Claims
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1. A color depth adjustment unit for converting an input video signal into an output video signal, wherein the input video signal has a plurality of input pixels having a plurality of input color portions of an input color size, and wherein the output video signal has a plurality of output pixels having a plurality of output color portions of an output color size;
- the color depth adjustment unit comprising;
an error diffusion unit coupled to receive the input video signal and to generate the output video signal; a first error buffer coupled to the error diffusion unit and having a plurality of error memory units having a plurality of color portions of an error buffer size; a second error buffer coupled to the error diffusion unit; and wherein the error buffer size is less than the input color size. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- the color depth adjustment unit comprising;
Specification