Genista Corporation
Template:Short description Script error: No such module "Unsubst". Script error: No such module "Infobox".Template:Template otherScript error: No such module "Check for conflicting parameters".Script error: No such module "Check for unknown parameters". Genista Corporation was a company that used computational models of human visual and auditory systems to measure what human viewers see and hear. The company offered quality measurement technology that estimated the experienced quality that would be measured by a mean opinion score (MOS) resulting from subjective tests using actual human test subjects.
Digital video systems exploit properties of the human visual system to reduce the bit rate at which a video sequence is coded. Video quality assessment tools based on network quality metrics such as packet loss, MDI, and PSNR do not correlate well with a perceived visual quality due to the nonlinear behavior of the human visual system. As a result, accurate prediction of the perceived quality of the output video should also take the human visual system properties into account.
Genista Corporation's patented technology was the result of research done by Stefan Winkler in the field of vision models and metrics. Details on his work can be found in his book: Digital Video Quality, Stefan Winkler, Wiley, March 2005, Template:ISBN.
In June 2007, Genista became part of Symmetricom's QoE Assurance Division.
See also
References
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- Video quality evaluation for mobile streaming applicationsScript error: No such module "Unsubst".
- Video quality evaluation for Internet streaming applicationsScript error: No such module "Unsubst".
- Color image quality on the InternetScript error: No such module "Unsubst".
- Visibility of noise in natural imagesScript error: No such module "Unsubst".
- Audiovisual quality evaluation of low-bitrate videoScript error: No such module "Unsubst".
- Visual fidelity and perceived quality: toward comprehensive metricsScript error: No such module "Unsubst".
- Apple QuickTime vs. Microsoft Windows Media: an objective comparison of video encoding qualityScript error: No such module "Unsubst".
Further reading
- Winkler, Stefan, Digital Video Quality, Wiley, March 2005, Template:ISBN
External links
- Genista Corporation - White Papers and Technical Articles on Video Quality Template:Webarchive
- ITU-R BT-series Recommendations on subjective video quality assessment
- Video Quality Experts Group