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Technology Glossary

In this constantly evoloving industry, it's difficult to keep track of today's latest and greatest trends. Understand the technology behind industry changes and improvements with CEA's collection of definitions for technology's latest trends.

Television Terminology
 
LED TV
Consistent with the industry-wide marketing practice of manufacturers and retailers, the CEA Video Division Board defines “LED TVs” to include liquid crystal display (LCD) televisions using light emitting diodes (LED) as a light source.
 
4K Ultra High-Definition TV 

A display system may be referred to as 4K Ultra High-Definition if it meets the following minimum performance attributes:

Display Resolution—Has at least 8 million active pixels, with at least 3840 horizontally and at least 2160 vertically. Physical pixels shall be individually addressable such that the horizontal and vertical resolution above can be demonstrated over the full range of colors provided by the display.

Aspect Ratio—The width to height ratio of the display’s native resolution is 16:9 or wider.

Upconversion – The display is capable of upscaling HD video and displaying it at 4K Ultra High-Definition display resolution.

Digital Input – Has one or more HDMI inputs supporting at least 3840x2160 native content resolution at 24p, 30p, & 60p frames per second. At least one of the 3840x2160 HDMI inputs shall support HDCP v2.2 or equivalent content protection.

Colorimetry – Processes 2160p video inputs encoded according to ITU-R BT.709 color space, and may support wider colorimetry standards.

Bit Depth – Has a minimum bit depth of 8 bits.
 
Connected 4K Ultra High-Definition TV

A display system may be referred to as Connected 4K Ultra High-Definition (or Connected 4K UHD) if it meets the following minimum performance attributes:

4K Ultra High-Definition Capability – Meets all of the requirements of CEA’s 4K Ultra High-Definition Display Characteristics V3.

Video Codec – Decodes IP-delivered video of 3840x2160 resolution that has been compressed using HEVC* and may decode video from other standard encoders.

Audio Codec – Receives and reproduces, and/or outputs multichannel audio.

IP and Networking – Receives IP-delivered 4K Ultra HD video through a Wi-Fi, Ethernet, or other appropriate connection.

Application Services – Supports IP-delivered 4K Ultra HD video through services or applications on the platform of the manufacturer’s choosing.

* High Efficiency Video Compression Main Profile, Level 5, Main tier, as defined in ISO/IEC 23008-2 MPEG-H Part 2 or ITU-T H.265, and may support higher profiles, levels or tiers.

Camera Terminology
 
4K Ultra High-Definition Cameras

A camera or camcorder may be referred to as 4K Ultra High‐Definition if it meets the following minimum performance attributes:

Capture
Capture requirements apply to all devices.
Resolution—Has optics and image sensor capable of capturing still images and video with at least 3840 pixels horizontally and at least 2160 pixels vertically.
Frame Rate—Captures 3840x2160 video at a minimum of 24p frames per second.
Bit Depth – Captures pixels with a minimum bit depth of 8 bits.

Record
Recording requirements apply to all devices.
Resolution—Records still images and video with at least 3840 pixels horizontally and at least 2160 pixels vertically.
Frame Rate— Records 3840x2160 video at a minimum of 24p frames per second.
Bit Depth – Records pixels with a minimum bit depth of 8 bits.
 
Playback
Playback requirements apply to all devices.
Resolution—Plays back captured or recorded still images and video with at least 3840 pixels horizontally and at least 2160 pixels vertically.
Digital Output – Has at least one HDMI‐compatible output supporting at least 3840x2160 resolution at a minimum of 24p frames per second.
Bit Depth – Plays back video with minimum bit depth of 8 bits.

Interchangeable Lens Cameras (ILCs)

The CEA Digital Imaging Division Board recently approved use of the following camera terminology:

  1. DSLR (short for Digital Single-Lens Reflex Cameras) is a subset of ILC cameras that includes a mirror mechanism. 
  2. Mirrorless (short for Mirrorless Interchangeable Lens Cameras) is a subset of ILC cameras that does not include a mirror mechanism. 
  3. ILC (short for Interchangeable lens Cameras) includes both DSLR and Mirrorless cameras. By definition, they have Interchangeable Lenses.