HDMI conversions

The consumer market has adopted High-Definition Multimedia Interface (HDMI®) technology in TVs, projectors, and other multimedia devices, making HDMI a globally recognized interface. HDMI is a very popular video interface, but not everything have HDMI inputs or outputs. An HDMI converter is a device that converts an HDMI signal to another format — and vice versa — so it can be displayed on a monitor or TV.

These are three common types of HDMI converters:
HDMI to DisplayPort converter – converters the HDMI signal to a DisplayPort signal.
HDMI to VGA converter – converters digital HDMI to analog VGA.
HDMI to DVI converter – changes the input signal from HDMI to DVI.

For HDMI-DisplayPort conversion there are two types of conversion adapters that can be used, the first is an active adapter, and the second is a passive adapter type. Most adapters only carry a one-way signal. If the source supports dual-mode DisplayPort (also known as DP++), then you can use a passive adapter because the source can perform the conversion. If the source does not support DP++, then you must use an active converter, which includes additional chips to perform the conversion.

You can convert SDI to HDMI and HDMI to SDI. This is often needed to connect HDMI cameras and computers to professional SDI equipment. Serial digital interface (SDI) is a family of digital video interfaces used in professional broadcast-grade video systems.

Here are some links to information on conversion between analog video interface and HDMI:

HDMI Made Easy of HDMI-to-VGA and VGA-to-HDMI Converters Design Circuit
Reference Design using part AD9983AK by Analog Devices
https://www.arrow.com/en/reference-designs/hdmi-made-easy-of-hdmi-to-vga-and-vga-to-hdmi-converters-design-circuit/f6ad4a6b85879dd3b4c6b55fb03b9fe758c344566c

HDMI Made Easy of HDMI-to-VGA and VGA-to-HDMI Converters Design Circuit. The consumer market has adopted High-Definition Multimedia Interface (HDMI) technology in TVs, projectors and other multimedia devices, making HDMI a globally recognized interface that will soon be required in all multimedia devices. Already popular in home entertainment, HDMI interfaces are becoming increasingly prevalent in portable devices and automotive infotainment systems

HDMI Made Easy: HDMI-to-VGA and VGA-to-HDMI Converters
https://www.analog.com/en/resources/analog-dialogue/articles/hdmi-made-easy.html

Already popular in home entertainment, HDMI interfaces are becoming increasingly prevalent in portable devices and automotive infotainment systems. In addition to improved market acceptance, using a standard interface greatly improves compatibility between projectors, DVD players, HDTVs, and other equipment produced by various manufacturers.

In some industrial applications, however, the transition from analog video to digital video is taking longer than in the consumer market, and many devices have not yet moved to the new digital approach of sending integrated video, audio, and data. These devices still use analog signaling as their only means of transmitting video, possibly due to specific requirements of a particular market or application. For example, some customers still prefer to use video graphics array (VGA) cables for projectors.

This article shows how advanced silicon solutions and smartly implemented software can facilitate HDMI implementation. Two basic devices—HDMI-to-VGA (“HDMI2VGA”) and VGA-to-HDMI (“VGA2HDMI”) converters—provide engineers familiar with video applications with an easy way to transition between analog video and digital video.

PCB Design Review: HDMI To LVDS Sony Vaio LCD Devboard
https://hackaday.com/2024/05/14/pcb-design-review-hdmi-to-lvds-sony-vaio-lcd-devboard/

Today, we revisit another board from [Exentio] – a HDMI/DVI to LVDS transmitter for the Sony Vaio P display. This board is cool to review – it has a high-speed serial interface, a parallel interface, a healthy amount of power distribution that can be tricky to route, and many connectors to look over.