THX spends numerous hours testing and analyzing displays in both laboratory and home theater environments to ensure the highest levels of quality and usability. Months of research went into developing a specification, covering a wide range of tests and hitting more than 400 data points. THX divided the testing into two primary categories: 1) Device Performance Testing; and 2) Video Signal Processing Testing.

Device performance tests are measured according to industry standard guidelines, as specified by VESA, ANSI, and SMPTE. This includes in-depth analysis of display uniformity, luminance and color levels, and resolution. By contrast, the video signal processing tests are defined by THX and include a complete review of each display’s scaling, deinterlacing and overscan capabilities.

And THX certification is not just focused on presenting stellar HD content. While most HDTVs perform well when presenting HD programming, there is a large variation in the performance of standard definition content. Since most home theater enthusiasts have extensive standard definition DVD libraries, it is critical for THX Certified Displays to present legacy content in the best possible resolution. Because scaling content from one resolution to another often degrades the quality of the presentation, THX works closely with its manufacturing partners to ensure that every THX Certified Display seamlessly scales content for the best possible viewing experience.

Testing Parameters

Unlike other testing and certification programs, which factor in product class, pricing and use cases, THX strictly focuses on display quality and performance. Regardless of the brand name, product price point or technology used, display products must meet the THX performance standards for product certification. There is no grading curve or rating system. With THX certification, it’s either pass or fail.