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The host or media player may not always be located in the same room as its monitor. For example, for digital signage, you may want to have multiple monitors controlled by a computer in different rooms, or you may want to add a monitor to one of your rooms In the room without having to add another TV box or set-top box.
We have seen solutions that extend the video signal to hundreds of meters using the following methods:
. The former is quite expensive (about $250), while the latter is only suitable for composite materials. Today, I came across other video extender solutions that rely on Cat5/Cat6 "Ethernet" cables, first through the sale of Ethernet to VGA extender kits.
, But there are also Ethernet to HDMI solutions
The maximum distance provided via Ethernet is 120 meters.
Both have a receiver and a transmitter, the latter is connected to the HDMI and VGA output of the host, and the former is connected to the display.
The VGA extender kit shown above can extend the signal to 60 meters, and neither the transmitter nor the receiver requires an external power supply. However, the main disadvantage is that although it is used with Cat5 cables,
, So you can’t simply connect it to the switch and expect it to work, and as far as I know, you need to use a straight cable between the receiver and the transmitter.
HDMI to "Ethernet" extender seems to work
Supports direct Cat5/Cat6 connection similar to VGA models, but can also convert HDMI signals into IP packets. They have a 5V power supply on each side, use Cat6 cables, and models that cost about $40 can reach a distance of 120 meters. Please note that Banggood only sells receivers, and I cannot find the sender on their website. The cheap $25 kit on Tomtop comes with both Rx and Tx, but the range using Cat6 cable is limited to 60 meters.
The models mentioned above support a maximum resolution of 1080p60, although there are some 4K HDMI extenders on Cat6/Cat7 cables, they are obviously more expensive
, And the more expensive model can support HDMI 2.0a up to 4K at 60K Hz at a distance of 70 meters. You will also see a $700 model on this page, but it is based on a long-distance optical fiber connection of 10 kilometers.
Since HDMI extenders work over a network, you can use routers/switches and multiple receivers to connect multiple displays to a single HDMI extender transmitter, which can be any device with Ethernet and HDMI output.
Jean-Luc started working part-time in 2010, then resigned as a software engineering manager, started writing daily news, and made full-time reviews later in 2011.
The Crowbits STEM educational kit consists of magnetic modules launched on Kickstarter a few weeks ago. There are five increasingly difficult tools in Hello Kit, which only require students to connect to the module to get started, that is, no programming is required.
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In my early list of third-party Raspberry Pi RP2040, I briefly mentioned the Cytron Maker Pi Pico backplane for Raspberry Pi Pico, which exposes all pins through a female connector, including LEDs for all GPIO pins, and six Grove connections. , Three users...
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Black Box has introduced six new KVX series KVM extender kits, each of which can control a remote server or computer from a local workstation with one or two screens.
In addition to extending KVM signals up to 328 feet (100m) through Cat-x cables through SFP connectors, or 18.6 miles (30km) on optical fibers through SFP connectors, Black Box’s plug-and-play KVX The extender kit also allows users to connect to a remote display for local monitoring.
The black box will release three copper cables and three optical KVX series extender kits to support DVI, 4K HDMI and 4K DisplayPort connections. DVI KVX models support 1920x1200 and old VGA ports for 60Hz video through an adapter. DisplayPort KVX models support up to 3840x2160 at 30Hz UHD video. The company will also launch a new dual-head KVM extender, which includes a DisplayPort/HDMI hybrid input to support dual HDMI displays with 3840x2160 60Hz UHD video. EDID emulation supports different resolutions and eliminates display compatibility issues.
The copper cable kit (KVXLC-200, KVXLCH-200, KVXLCHDP-200) allows remote computer access up to 330 feet (100m), while the optical fiber kit (KVXLCF-200, KVXLCHF-200, KVXLCHDPF-100) is convenient for remote computer access. The maximum distance of the SFP module is 18.6 miles (30 kilometers). In addition to the expansion of USB 2.0, analog stereo audio (speakers and microphones) and serial signals, all six extender kits also have two additional video ports on the transmitter, allowing monitoring of computers in data centers or computer rooms. Each KVX series extender kit includes a PC connection cable.
John Hickey, senior director of Black Box KVM and R&D, said: "The new KVX series extender kits are very suitable for budget-conscious users who want them to provide a plug-and-play KVM solution for workspaces with one or two screens." These extension kits can provide convenient and reliable access and control to remote and backward servers or PCs, thereby reducing noise and confusion in the work environment, while simplifying the management and monitoring of remote systems. Setup is quick and straightforward: users only You need to connect the transmitter to connect the unit to the computer, connect the receiver unit to the screen and peripheral equipment, and then connect the two units with a network cable."
The new KVX extender kit has pricing and features to meet the needs of design, graphics and video production, and software development. Due to location, environment or security measures, users are allowed to control remote or physically inaccessible systems. They are convenient solutions for office connection, server management, remote monitoring, process control or medical and industrial equipment control.
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We investigated new products in this category and insisted on our choice. Even though they are older models, they still offer the best combination of price range and features.
We still do not recommend using a wireless HDMI system for 4K signals. You can read why
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Sometimes, laying a video cable between the source and the TV (or projector) is not feasible or convenient, especially when they are in a separate room. Although many wireless HDMI solutions can send AV signals in a room, we still like
Because it can reliably transmit signals around the entire house (up to 100 feet), and has more features than other similarly priced systems.
The transmitter can easily and reliably wirelessly send HDMI video signals and 5.1 audio to a receiver up to 100 feet away, and can be powered by a USB port.
*At the time of publication, the price was
It is a low-cost, easy-to-use option that can wirelessly send 1080p and 5.1 HDMI video and audio signals in the entire room or the entire house without degrading the quality. The basic unit has two HDMI inputs and one HDMI output, so you can plug in multiple sources and easily get power from the USB 3.0 port (more information below).
It is a bit more expensive than our main product, but it combines two HDMI inputs and supports 7.1 sound.
If you want to fill the room with other audio,
Support 7.1 sound. Like our preferred product, this model can support two HDMI sources, can be powered through a USB port, and has reliable performance. However, the additional cost prevents it from occupying the top spot.
This does not have our first two options or multiple input ranges, but it is an inexpensive way to transmit an HDMI source wirelessly.
It does not pass through walls as well as other pickups, but it is strong enough to send the signal to the entire room. This is a cheap and easy way to stream HDMI sources. It has only one HDMI input, but it does support 7.1 sound and USB power, and it is the cheapest model we have tested.
Rachel Cericola has written articles on consumer electronics for more than 15 years and has tested home theater products ranging from remote controls, audio-visual receivers to speakers. Rachel was the former editor of "Electronic House" and "Big Picture Loud Voice". He wrote buyer guides for various consumer electronics products, and also contributed to "Connect", "Women's Day", "GeekMom", "Men's Health", etc Work completed the work related to technology.
In addition to serving as an AV editor at Wirecutter, Geoffrey Morrison has also reviewed AV equipment for 17 years, and
, Sound and vision, and
. He also served as the technical editor of "Home Theater" magazine for 7 years.
The products mentioned here are used to wirelessly transmit high-definition video and audio signals from HDMI signal sources to the TV. There are four main uses for wireless HD products:
But remember, convenience comes at a price. Wireless is always more temperament than wired, it takes some time to synchronize (connect), and it may/occasionally drop.
A few words about all wireless HDTV solutions. Almost every wireless HDTV product can transmit up to 1080p video from any HDMI signal source you send. This includes Blu-ray (2D and 3D), cable/satellite and gaming systems. Most TVs also emit infrared signals, so when you are in another room of the TV, you can control the signal source (such as a cable box) connected to the transmitter. The wireless products covered in this guide can handle all current 720p and 1080p, but they cannot use Ultra HD 4K. However, 4K solutions are beginning to appear (see "
"For more information).
When choosing a product, we searched for the product on Google and Amazon. We also studied the technology used on each product. (Warning: terminology!) There are two main standards for wireless transmission of HDMI signals:
Devices using the same wireless transmission standard will work similarly to each other, and each standard has its own advantages and disadvantages. For example, products that use the WirelessHD standard can transmit uncompressed video. However, they only work when there are no obstacles (such as walls or cabinets) between the transmitter and receiver. In other words, if you want to place the TV in a room different from the signal source, you are out of luck. To make matters worse, many cabinets block high-frequency signals, so hiding the signal source in furniture will not work. In our tests, even walking between the transmitter and receiver seemed to interfere with the signal.
Model using Wi-Fi, for example
, Less common. However, Actiontec is one of the few products that allows you to add other receivers, so multiple TVs in your home can use the same source. For most people, our best option is a better choice, but if there are multiple recipients that are useful to you, then Actiontec is worth a try.
There are other wireless technologies that are not yet widely available on the market. For example, WiGig or wireless gigabit has the bandwidth to handle 1080p video (and then some videos). However, WiGig is similar to WirelessHD and works in the 60 GHz frequency band, so it may have similar limitations.
Intel's WiDi is built into the notebook computer, and does not have the "thousands of miles away" features like the products here. It is worth noting that if your laptop has an HDMI output, although you need to connect to a wireless transmitter via HDMI, you can use one of these products to wirelessly send computer content to the screen.
We connect the receiver part of each product to the TV on the first floor of a small house. Then, we paired four HDMI transmitters with the Blu-ray player and Roku box, located in the four areas of the house. First, place the source device on a table 10 feet directly opposite the TV. Then, we moved the video equipment to a room 20 feet away adjacent to the TV area. This room does not have a door, but it is not within the line of sight of the home theater. Next, move it to an adjacent room, which is separated by a wall 25 feet away. Then, we moved the equipment to the furthest point in the house, in the corner of the bedroom upstairs 45 feet away.
In our final test, all equipment failed: 100 feet from the TV across the street. Many products claim to have this type of range, but unless you have an absolute line of sight between the two products, you can bring a little salt.
We watched several Blu-rays wirelessly, including action, animation, and comedy. Next, we try to stream content from Netflix, Amazon and Crackle. Finally, we played
Use the Roku 3 box, which is longer than we should.
It is the best HDMI transmitter for most people. Using WHDI, it can provide the best image at the longest distance, has two HDMI inputs, and can be powered by the included AC adapter or the TV's USB 3.0 connection (cable not included). It is also the cheapest dual HDMI unit we have tested.
The basic unit of the Iogear transmitter has two HDMI inputs and one HDMI output. This means that you can connect a TV, transmitter, and signal source (such as a Blu-ray, cable/satellite TV box) in one room, while wirelessly sending the same signal to another TV elsewhere in the house.
Throughout the test, the device performed well even if the transmitter and receiver were located on different floors. There is also no significant video delay. This means that gamers who are worried about their twitch skills should not pay too much attention to wireless technology. Due to the encoding/decoding process, it may increase the time by a fraction of a second, but it is less than the time that can be detected using conventional test procedures.
Perhaps our favorite feature of Iogear is that you can use the USB 3.0 port to power the receiver unit (you need to buy your own USB 3.0 rating)
cable). This means that Iogear can get power from the TV without having to connect extra wires to a power outlet. This makes it easy to hide and is an effective alternative to cutting holes in the wall to hide cables. Not every TV has USB 3.0, the receiver may still work with fewer USB connections, but Iogear specifies USB 3.0. If your TV does not have a USB 3.0 port, Iogear will also come with a power adapter. Moreover, the receiver is small enough to fit behind many wall-mounted TVs.
Finally, it should be noted that the GW3DHDKIT transmitter is compact. Unlike our runner-up, GW3DHDKIT has a horizontal design, but it can also be used vertically, so it is easy to slide into the AV cabinet.
, Daniel Kumin from Sound & Vision said: "Iogear's solution allowed me to choose the latest solution: the widest range, the most features, and the ergonomics." His only complaint was that it was a bit expensive. But since his review, the price has been cut by almost half, which brings it in line with the WirelessHD product that he doesn't like much.
Mark Anderson from HomeToys
"If you want to place a TV or projector where it is difficult to lay cables, or want to connect a TV in another room to your main home theater, the Iogear Wireless HD 3D Digital Kit may be just a ticket. In all my tests It all worked perfectly."
The genius writer of HD Guru (coincidentally, just like our own Geoff Morrison)
(two over five). In a comparison test with three other wireless HD transmitters
, He said to Iogear: "If Iogear can rush to our preliminary review in time, it will undoubtedly win."
Like all current wireless HDTV solutions, Iogear is not perfect. Although we did not encounter serious problems during the test, a few Amazon reviews reported problems with transmission distance. In our test, our transmitter and receiver are located at the opposite corners of my little house, and good images can be obtained, but compared with a wired connection at the same distance, doing so will result in a significant reduction in image quality. Remember, the result will depend on the size and structure of the house.
In other words, it is unfair to expect any wireless system to work perfectly at the nominal maximum distance, especially in the presence of obstacles. On smaller TVs (such as 50 inches and below), you are unlikely to see a difference in picture quality even at a long distance. In the same room, the image is always perfect.
Please also note that although the Iogear receiver can be powered by USB power, it can only be used with USB 3.0, and there is actually no USB cable (you need to provide it).
Finally, since the transmitter only has two HDMI inputs, if you have more than two HDMI sources (one
Or HDMI switcher would be better).
The price is slightly higher than our first choice
It is another good choice for wireless HDMI use. That extra cost is because the product increases audio support to 7.1. Its performance is very similar to the Iogear model, with two HDMI inputs, one HDMI output and a USB power option (but still not including the cable).
The excellent performance of Aries Home+ is all our test. It uses a technology called GigaXtreme Technology, which operates similarly to WHDI, so it can pass through walls and cabinets. It also has support for uncompressed 7.1 PCM, DTS and Dolby Digital surround sound.
Said: "The overall experience of watching video and TV definitely exceeded my expectations."
This is certainly a good performance, but we doubt whether 7.1 will make most people want to spend extra money. Unless you want to build a complete home theater, for most people, our first choice will be the best choice.
For those who can’t drill, wire or spend a lot of money,
It is a good budget choice. It can stream an HDMI signal source and has the USB power option that we liked very much in the first two choices.
However, this model runs at 60 Hz, which means it is an excellent indoor solution. When sight is available, it works well at medium distances. It does not work properly through walls or cabinets (or does not work at all).
It can support 7.1 sound, including Dolby TrueHD and DTS-HD main audio streams, which makes it unique in this category and price range. If you need a simple short-distance solution, then Blackbird Pro is definitely a good choice.
Companies such as DVDO and IOGear have launched or announced wireless HDMI systems with 4K capabilities, such as
. Currently, there is no 4K friendly system that we know of that can transmit HDR wirelessly, only
Support full 4K/60 signal. Since these wireless systems cannot provide a complete UHD/HDR experience, we are unwilling to choose in this category. For indoor settings, we still recommend using an 18 Gbps HDMI cable to get the most stable signal. For remote UHD/HDR settings, you might consider using an HDMI-like fiber optic system
We tested two samples
, Can be sold in houses and apartment environments through Wal-Mart. The Blackweb system can support up to three HDMI signal sources, can pass through walls, and can generate reliable signals in multiple rooms in the house. However, in apartments, the reliability of the signal is much worse. Even if the transmitter and receiver are in the same room, we still see stuttering and blocking in the video. In addition, both Blackweb samples crushed the black, making the image too dark, so you must readjust the brightness control of the TV to compensate. If you are looking for an inexpensive way to wirelessly transmit HDMI around your house, as long as you don't mind changing the TV settings, the Blackweb kit can do the job.
Similar to our budget selection,
Use 60 GHz technology to provide 1080p/60 uncompressed video and audio. This means that it is best used as an indoor solution. Like the Monoprice model, it also has a USB power option and an HDMI input, but the price is slightly higher.
If our popular choice does not have enough investment to meet your needs, then you may want to consider
. The transmitter has four HDMI and an analog component input, which is a convenient choice for people who have multiple signal sources but no receiver, even if it is expensive. However, we think that most people can do it with our preferred product and the HDMI switcher priced at $20.
It should be similar to our choice, but farther away. With it, you can stream uncompressed HD content to up to four different displays (with additional receivers). Because it is over $500 and is specifically for a longer range, we believe this is beyond the scope of this article.
Similar to our runner-up, but reduced costs by canceling one of its HDMI connections. It does have support for 7.1 sound, but the price is too high for a single source solution.
It can transmit up to 1080p/60 video through the wall, but its transmission distance is smaller than Aries Home+ (40 feet), only supports Dolby Digital 5.1 audio, and only supports a single HDMI signal source. However, it has the function of HDMI pass-through to nearby TVs. You can also add more receivers, and you can power the transmitter and receiver via USB.
Similar to Iogear, but with the addition of USB transfer, so you can transfer content from a game controller, keyboard or mouse, but at a higher cost.
, "Sound and Vision" Magazine
, April 3, 2012
, Household toys
, July 1, 2012
, HD Master
, December 11, 2011
, November 22, 2011
Rachel Cericola is a senior writer at Wirecutter. He has been studying smart home technology since X10. Her work has been published in "New York Times", "Wired", "Men's Health", "USA Today" and other magazines. She hopes that neighbors will read this resume, because it can explain why she always runs four video doorbells outside the house at the same time.
These cheap HDMI cables can be used with all the devices you currently use, even 4K HDR TVs and signal sources.
Skip the cinema this summer and enjoy a movie night in the backyard.
Choosing the right projector based on your needs can be daunting. Before starting the search, here are some questions to ask.
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, Is an industry leader in audiovisual distribution and electronic accessories products, today launched a new matrix switch and 4K receiver series under the Evolution series of its professional audio and video distribution products. The new product line provides an unparalleled solution to switch multiple signal sources to multiple displays using HDBaseT
Technology, with multiple functions of control, audio, 4K HDR resolution and zoom.
The new matrix product line includes four new models with 4K@60Hz, 4:4:4 and HDR, and provides various distribution products that can work together to support various functions and price points. Both distributors and dealers are advantageous. Target products for 4K installation, selected products and selected products.
Evolution EVMX4X3 is an extension of the previous matrix switch model. It can distribute four HDMI sources to up to four displays at the same time. Three outputs of Cat6 are transmitted using HDBaseT, and one output of HDMI has analog and digital audio output.
Evolution EVMX44PRO increases the total number of outputs and provides the ability to use digital optical outputs to send any HDMI audio input or ARC to up to four zones. It allows four HDMI sources to be distributed to up to four displays at the same time, with a total of eight mirrored HDMI outputs.
Evolution EVMX8X6 provides eight HDMI sources that can be distributed to up to eight displays at the same time. Six outputs of Cat6 are transmitted using HDBaseT, and two HDMI outputs have analog and digital audio outputs.
Evolution EVMX88PRO provides the most important distribution option in the entire product line. It allows eight HDMI sources to be distributed to up to eight displays at the same time, with a total of 16 mirrored HDMI outputs. EVMX88PRO also has the function of using digital optical output to send any HDMI audio input or ARC to up to eight zones.
A series of new Evolution 4K HDR HDBaseT™ receivers have also been added to the Evolution series. The receiver consists of two models that can be mixed and matched with compatible Evolution matrix units to provide flexible modular matrix switching for any application system.
The Evolution EVRXHD2 receiver with POC and bidirectional IR allows expansion of 4K@60Hz, 4:4:4 chroma subsampling, and HDR up to 131ft/40m and 1080p up to 230ft/70m via a single Cat6 cable. PoC (Power Over Cable) allows EVRXHD2 to be powered by Cat6 of the matrix unit. For projects that require more options to implement audio, control, and zoom functions, the EVRXDSC receiver has all the same features as EVRXHD2, and more features, including RS-232 pass-through, ARC, audio extraction and scaling.
Both EVRXHD2 and EVRXDSC receivers are compatible with the new EVMX4X3, EVMX8X6, EVMX44PRO and EVMX88PRO matrix units.
Brandon White said: "In the research and development of a series of evolution matrix switches and receivers, we are determined to provide a production line for full 4K AV distribution to adapt to ARC, audio routing and scaling to adapt to more complex residential or commercial Application." Vanco International Product Development Director. "With the release of this new product line, there is no longer a need to pay for unused functions and updated matrix programs. This allows the installer to flexibly tailor its project needs and budget according to the needs of customers."
The new Vanco Evolution matrix products are now on the market. Interested distributors can contact Vanco International directly for pricing.
For product specifications and more information, please visit the Vanco website:
Caster Communications, Inc., 401-792-7080
This part of "PR Wire" of TWICE contains original press releases that reflect the views of the industry organizations that issued the news. TWICE editors do not review or edit press releases. Supplier, PR Wire is a "virtual press conference".
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