Overlay Processing Circuit for Region-Specific Image Error Detection
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Solution Overview
Problem
Existing video processing devices struggle with error detection in composite images and split images, as they cannot obtain an expected error code value for combined or split images, leading to inadequate error detection.
Innovation Solution
A circuit device with an overlay processing circuit that performs overlay processing on first and second input image data and outputs the result, and an error detection circuit that calculates error code values for specific areas of the output image data and compares them with expected values for error detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If overlay processing is performed to combine images, then image composition capability is improved, but error detection capability deteriorates because expected error code values cannot be obtained for combined images
Solution Approach 1:
The patent divides the composite image into multiple regions (OSD region and non-OSD region) and performs error detection separately on each region. This segmentation allows the system to obtain expected error code values for each individual region and compare them with calculated values, thereby restoring error detection capability while maintaining overlay processing functionality.
Solution Approach 2:
The patent introduces an intermediary mechanism by calculating expected error code values for specific regions (OSD and non-OSD) separately. This intermediary approach enables the system to bridge the gap between overlay processing and error detection by creating a reference framework for comparison that works specifically for composite images.
2Adaptability or versatility
If image is split into two or more images, then display flexibility is improved, but error detection capability deteriorates because expected error code values cannot be obtained for split images
Solution Approach 1:
The patent applies segmentation by dividing both the original image and the split images into corresponding regions. By maintaining region correspondence between the original and split images, the system can calculate and compare expected error code values for each region, enabling error detection on split images while preserving display flexibility.
Data Source
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AI summary
A circuit device includes an overlay processing circuit and an error detection circuit. The overlay processing circuit performs overlay processing of first input image data on a first area of second input image data and outputs a result of the overlay processing as output image data. The error detection circuit calculates a first error code value corresponding to image data of the first area of the output image data and a second error code value corresponding to image data of a second area not overlapping the first area of the output image data. The error detection circuit performs error detection on the output image data by comparing the first error code value with a first expected value and comparing the second error code value with a second expected value.