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Display technology

 

Displays play a decisive role in the entire television production as the electro-optical interface between electronics and humans.

The emergence of flat screens has transformed the world of display technology in the past several years. Today, all manufacturers offer flat screen displays for professional use, and high-end consumer devices are finding their way into the professional market. The display manufacturers are presenting new models in increasingly shorter intervals, and the broadcasters have to react appropriately in order to continue offering their viewers the best possible content. 

The IRT observes the developments in the display market and does various measurements on TV devices (colorimetric measurements and evaluation of the quality of displays for television, resolution measurement, noise development measurements). 

The IRT advises the broadcasters specifically about the use of modern display technology in the studio. Our experts especially research the suitability of flat displays in the production environment (for example as reference, control or observation monitors). 

Interfaces

The “High Definition Multimedia Interface” (HDMI) has meanwhile become a standard, especially in the consumer segment. With regard to professional video technology, an increasing number of HDMI interfaces can be found in the devices. HDMI allows for the transmission of audio and video signals, including UHD, along with device control and copy protection data. Since HDMI was originally an interface for the consumer segment, it does not comply with all of the requirements in the professional environment. The IRT experts conduct the appropriate research and make recommendations about the subject.

More about HDMI

Encryption

HDCP (High-bandwidth Digital Content Protection) is an encryption system for the transmission of audio and video data via the HDMI interface. HDCP aims to prevent the illegal copying of video and audio material. All of the components used for the playback of HDCP-protected content have to support HDCP.

Protected content includes the appropriate information that triggers the playback device (source) to make a request for an HDCP-protected connection with the target device (sink). If this connection request is positively confirmed, for example by a display, the audio and video data is transmitted encrypted. The encryption/decryption is done through a key defined by the source and sink that is constantly changed and verified. If the signal path includes components that do not support HDCP, playback can be restricted (e.g., in low resolution) or entirely denied.

Your contact

Sebastian Goossens
Sachgebietsleiter
Head of Department
Tel. +49 (0)89 32399-358