The Video Division Board of the Consumer Technology Association (CTA) recently updated the official industry terminology for 4K Ultra TVs by including definitions for displays that support a wide color gamut (WCG).

Prior, the CTA board had established related terms for 4K Ultra HD supporting High Dynamic Range (HDR).

Most of the terms fall into line with definitions previously established by other multi-industry groups including the Blu-ray Disc Association and the UHD Alliance, and issues formal criteria for how certain products should be displayed and marketed.

Read more about the CTA’s WCG and HDR display terminology after the jump:

According to the CTA, an “HDR Compatible Display” is a TV, monitor or projector that meets the following minimum attributes:

  • Includes at least one interface that supports HDR signaling as defined in CEA-861-F, as extended by CEA-861.3.
  • Receives and processes static HDR metadata compliant with CEA-861.3 for uncompressed video.
  • Receives and processes HDR10 Media Profile from IP, HDMI or other video delivery sources. Additionally, other media profiles may be supported.
  • Applies an appropriate Electro-Optical Transfer Function (EOTF), before rendering the image. The EOTF is the process for transferring digital code into visible light.

According to the CTA’s definition for the HDR10 Media Profile, HDR10: has an EOTF using the Society of Motion Pictures & Television Engineers (SMPTE) ST 2084 standard; color sub-sampling of 4:2:0 (for compressed video sources); bit depth of 10 bits; color primaries conforming to the International Telecommunications Union ITU-R BT.2020 color space; and metadata conforming to the SMPTE ST 2086, MaxFALL, MaxCLL  standard.

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The CTA further defined a Wide Color Gamut (WCG) Display as a TV, monitor or projector that: receives and decodes ITU-R Recommendation BT.2020 signal input, and remaps as appropriate for the display; with rendering exceeding 100% of the BT.709 color space recommendation.

In another move, the CTA Video Division Board formally sanctioned the “consistent industry-wide marketing practice” of using the term “LED TV” to include liquid crystal display (LCD) televisions using light emitting diodes (LED) as a light source.

The CTA also has terminology established over the past several years defining an Ultra High-Definition TV and a Connected 4K Ultra High-Definition TV. A list of the formal terms can be found here.

By Greg Tarr


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