HDMI female connectors are usually built into both the signal source and the receiving device as sockets for a male-end cable. In the most common arrangement, a cable with two male ends is plugged into two female sockets simultaneously. This provides direct wired connectivity between the source and display devices.
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As female HDMI connectors are usually recessed into the body of TVs, games consoles, projectors, computers, and monitors - and because they tend to be more susceptible to deforming under excessive strain than male connectors - they&#;re more widely sold as standalone replacement parts.
Male HDMI connectors, on the other hand, are generally supplied as fixed components at either end of almost every commercially available HDMI cable. In many situations, it&#;s easier and cheaper to replace a damaged male connector by swapping in a replacement cable. However, this isn&#;t always practical. Some high-end HDMI cables can be relatively expensive (especially the longer and sturdier types), and so in these cases, it can be considerably cheaper to wire a new male connector than to replace an entire cable run.
In addition, many people choose to route HDMI cables behind walls or between floors of a building. It can be a complicated process to remove and re-lay these if one of the male connectors gets damaged. For this reason, most reliable suppliers that stock female HDMI sockets also offer equivalent male components.
If you have a device that produces a video and audio output which is necessary for the operation or the enjoyment of that device, you can either display it via an on-board screen, or send the signal to a separate monitor or display. Sending it will require some type of cable system with integral connectors.
That is a simple way to look at a somewhat complex story that spans many years of interconnect technology development. It begins with the Composite RCA standard for TVs in , moves through S-Video for VCRs and home computers in and VGA for IBM PCs in , and on to Component RCA and DVI in the &#;s. With the exception of DVI, these were all analog cable standards, and the signals carried were either audio or video, but not both. In short, you needed a lot of cables to make things work.
The early history of audio and video connectorsDVI took this a step forward by supporting digital video, but users who wanted to transfer audio and video at the same time still had to use up to five separate cables. It wasn&#;t until the introduction of the High-Definition Multimedia Interface (HDMI 1.0) standard in that these multiple cables were integrated into one.
With the introduction of the new standard, HDMI cable and connector acceptance began to grow through a twenty-year period of development that made HDMI one of the most used formats for both home and workplace audio video signal transfer. Shop Same Sky's full range of HDMI connectors.
A dozen updates to the original HDMI standard have been released since offering higher speed, increased bandwidth, better resolution, support for new broadcast formats, and various connector sizes.
The original HDMI 1.0 specification was developed by the HDMI Forum mainly to clean up the mess of cables necessary to move video and audio, along with improving functionality. The specification defined the basic capabilities of a single cable, digital audio and video connector interface system. The technology worked and, according to its creators, &#;continues as the leading digital video, audio and data interface that connects ultra-high-definition displays to a wide range of consumer electronics, PC, mobile, automotive and commercial AV devices. It also has expanded into enabling solutions for industries such as healthcare, military, aerospace, security, surveillance and industrial automation.&#;
The most recent version of the standard is version 2.1, released in November of . It supports a range of higher video resolutions and refresh rates up to 10K. It also supports High Dynamic Range (HDR) formats and bandwidth up to 48Gbps. The actual connector itself, however, is not changed.
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Generation HDMI 1.0 HDMI 1.3 HDMI 1.4 HDMI 2.0 HDMI 2.1 Speed 4.5 Gbps 9 Gbps 9 Gbps 18 Gbps 48 Gbps New Features p Deep Color 4K@30FPS & 3D 4K@60FPS Up to 10K, Dynamic HDR, Ethernet, Variable Refresh Rate Initial Release December June May September NovemberAn HDMI cable is composed of several shielded twisted pairs of wire that carry the video signal plus separate conductors for power, ground, and other lower-speed device communication channels. HDMI connectors terminate the cable and connect to the devices being used. Physically, these connectors are trapezoid in shape, with indents on two of the corners to allow for proper alignment when inserted. They are similar in appearance to USB connectors. There are five different types of HDMI connectors:
All of these connectors come in both male and female versions and are either straight or right-angled with horizontal or vertical orientations. Female connectors are most often built into the source device and the receiving device. Adapters and couplers are also available as well as rugged connector versions for harsh environments.
The basic and most popular feature of HDMI connectors and cables is their ability to transmit both audio and video signals with a single cable without degradation. The latest version of the HDMI standard also incorporates features that are matched to the capabilities of the output device. These include:
Other than Type B, the different HDMI connector types each house 19 pins, but the pin configuration for the signals that they carry differs from type to type. This means that within a particular type there is backwards compatibility, but care must be taken when designing or making cables that the right pin numbers are used for the different signals. Since each of the types cannot mate with those of a different type, there are no cross-connecting issues.
HDMI connector pinoutsThe above diagram shows a typical Type A pin configuration. Individual pins can carry either data signals, clock signals, low voltage power, control signals, CEC, or HEC.
HDMI cables are available in several types:
PCB layout using HDMI devices can be critical in order to minimize crosstalk and signal integrity. Care should also be taken with designs using twisted wire pairs. Cables using twisted pairs can also suffer signal loss over distances approaching 50 feet due to attenuation. HDMI extenders can be used to increase this distance up to 300 feet.
HDMI technology is also not well suited to driving multiple devices at the same time. It cannot send multiple signals to separate devices and cannot send surround and stereo audio signals simultaneously.
In theory, any device that sends audio and video signals to another device, like a monitor, can use HDMI technology for the connection. This opens up a broad range of applications and uses, from consumer devices to business and industrial systems. Some of the current applications for HDMI include, but are not limited to:
HDMI connection technology is excellent for reducing cable clutter and complexity in systems generating high quality and high bandwidth audio and video signals at the same time. Changes in the standard over the years have allowed for improved data transfer speed and bandwidth and have added significant features, like Ethernet. The connectors and cable that make up this system are currently found on devices and systems used in home entertainment, workplace communications and the commercial and industrial markets. The HDMI interconnection format is currently one of the most popular and widely-used means to carry high-quality AV signals between a source device and a display.
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