Patent ID: 9123278
Filing Date: 2015-09-01
Classification: G09G

Abstract:
1. A graphics processing pipeline comprising a chroma downsampling unit, wherein the chroma downsampling unit is configured to: receive a column of contiguous chroma pixel components of an image; produce downsampled chroma blue and red pixel components on every other clock cycle when performing only horizontal downsampling, wherein performing only horizontal downsampling comprises: writing a first column of chroma blue and red pixel components to a first set of registers in a first clock cycle; clocking the first column of chroma blue and red pixel components through to a second set of registers in a second clock cycle, wherein the second clock cycle is immediately after the first clock cycle; writing a second column of chroma blue and red pixel components to the first set of registers in the second clock cycle; adding together values from the first set of registers and the second set of registers in a third clock cycle; dividing the values added together by two in a fourth clock cycle to calculate an average of each pair of chroma blue and red pixel components from both columns; and conveying downsampled chroma blue and red pixel components to a next stage of the graphics processing pipeline on every other clock cycle when performing only horizontal downsampling.