Application of video to graphics weighting factor to video image YUV to RGB color code conversion

A video processing method for combining first and second input signals to provide a combined output signal, wherein the first input signal is representative of a first pixel and the second input signal is representative of a second pixel and a combining factor index, the method comprising the steps of:

• (a) determining with a lookup table means a combining factor in accordance with a table location accessed by the combining factor index of the second input signal;
• (b) applying the first and second input signals and the combining factor to a blending circuit;
• (c) combining with the blending circuit the first and second input signals in accordance with the combining factor to provide a combined output signal;
• and
• (d) converting the first pixel from a YUV type pixel to an RGB type pixel before the first pixel is applied to the blending circuit, wherein the lookup table means comprises:
• (1) a plurality of lookup tables for converting the second pixel from a YUV type pixel to an RGB type pixel before the second pixel is applied to the blending circuit;
• and
• (2) a lookup table for determining the combining factor in accordance with the table location accessed by the combining factor index of the second input signal.

A video processing system for combining first and second input signals to provide a combined output signal, wherein the first input signal is representative of a first pixel and the second input signal is representative of a second pixel and a combining factor index, the system comprising:

• (a) a lookup table coupled to the second input signal, the lookup table having a plurality of table locations;
• (b) a blending circuit coupled to the first and second input signals and to the lookup table, the blending circuit generating the combined output signal;
• and
• (c) a YUV to RGB converter circuit coupled between the first input signal and the blending circuit;
• wherein:
• the lookup table determines a combining factor in accordance with a table location accessed by the combining factor index of the second input signal;
• the blending circuit combines the first and second pixels in accordance with the combining factor to provide the combined output signal;
• and
• the lookup table comprises:
• (a)(1) a second YUV to RGB converter circuit coupled between the second input signal and the blending circuit, the second YUV to RGB converter circuit comprising a plurality of lookup tables;
• and
• (a)(2) a combing factor lookup table coupled between the second input signal and the blending circuit, wherein the combining factor lookup table outputs the combining factor in accordance with the table location accessed by the second input signal.

A video processing system for combining first and second input signals to provide a combined output signal, the video processing system comprising:

• (a) lookup table means, wherein the first input signal is representative of a first pixel and the second input signal is representative of a second pixel and a combining factor index, wherein the lookup table means is for determining a combining factor in accordance with a table location accessed by the combining factor index of the second input signal;
• (b) a blending circuit for combining the first and second pixels in accordance with the combining factor to provide the combined output signal;
• (c) means for applying the first and second pixels and the combining factor to the blending circuit;
• and
• (d) means for converting the first pixel from a YUV type pixel to an RGB type pixel before the first pixel is applied to the blending circuit, wherein the lookup table means (a) comprises:
• (a)(1) a plurality of lookup tables for converting the second pixel from a YUV type pixel to an RGB type pixel before the second pixel is applied to the blending circuit;
• and
• (a)(2) a lookup table for determining the combining factor in accordance with the table location accessed by the combining factor index of the second input signal.