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Method to objectively measure video quality in graphics chipsets

IP.com Disclosure Number: IPCOM000016700D
Publication Date: 2003-Jul-09
Document File: 3 page(s) / 157K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method to objectively measure video quality in graphics chipsets. Benefits include improved performance, an improved test environment with automation, and an improved development environment.

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Method to objectively measure video quality in graphics chipsets

Disclosed is a method to objectively measure video quality in graphics chipsets. Benefits include improved performance, an improved test environment with automation, and an improved development environment.

Background

        � � � � � . Every graphics chipset is designed to meet requirements around specific types of trade-offs (3D, video, quality, performance, etc.). Changes in the graphics chipset microarchitecture as well as changes in software components such as VideoBIOS or graphics drivers can have a significant impact on the quality vs. performance compromise of a typical graphics chipset.This invention was created with the intent of quantifying the quality of the graphics chipset such that validation teams can evaluate quality of the chipset across steppings, generations of product lines, or even within a single production lot. In addition the data provided by this tool is instrumental to designers when balancing the compromises mentioned above.

        � � � � � Conventional chipset compatibility validation involves a technician visually checking for video playback errors while watching video played on the PC being tested (system under test, SUT). This subjective assessment is error prone and does not provide an objective, repeatable video quality metric.

        � � � � � Several video quality assessment tools are commercially available. However, none exists that can objectively measure the video quality of chipset video playback in realtime and in an automated fashion.

        � � � � � Given a typical 720x486 format NTSC clip at 32 bpp and playing at 30 fps for 10 seconds, an analysis system would be required to capture and analyze 400 MB of video data within those 10 seconds. This task is impossible for any conventional PC-based quality assessment tool.

        � � � � � ..

General description

        � � � � � The disclosed method accurately and objectively measures video quality of video signals rendered from any graphics chipset. The method includes a design for a tool that executes in realtime. The method evaluates video features rather than the actual video. The disclosed solution extracts only the quality features required for the analysis while maintaining the accuracy of the measurement. Compared to the conventional solution, the disclosed analysis system would capture and analyze only 100 MB, which is feasible for high-end PCs.

Advantages

        � � � � � Some implementations of the disclosed structure and method provide one or more of the following advantages:�

•        � � � � Improved functionality due to the capability to evaluate the compatibility of various encoding types and media players

•        � � � � Improved test environment due to providing objective, measurable results

•        � � � � Improved test environment due to automating the testing process

•        � � � � Improved test environment due to support for future technologies because of the tool’s modular architecture

•        � � � � Improved development environmen...