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High Definition Multimedia Interface (HDMI) is the first choice for connecting audio and video sources. HDMI is loved by Hollywood film studios because of its powerful HDCP copy protection function, which affects the best of HD disc players (such as Blu-ray (and the now-defunct HD DVD format)) to send 1080p HD video and HD audio the way. , Through DTS Master Audio and/or Dolby True HD.
Today's best receivers and AV preamplifiers have multiple HDMI inputs and can receive the latest HDMI signals including high-definition audio and video.
In order to keep pace with the times and/or confuse consumers, electronics manufacturers and audio-visual installers, HDMI has undergone several changes to its format since it was released to consumers in 2003.
HDMI 1.0 is the first version of the acclaimed HDMI single-cable, copyright-protected connection system designed to convert high-definition content from audio and video sources to a way of video display and audio playback systems. The HDMI 1.0 specification has a maximum TMDS bandwidth of 4.9 Gigabits, and supports up to 3.96 Gigabits of video bandwidth (1080p video at 60 Hz or UXGA) and eight channels of LPCM / 192 kHz-24 bit audio.
The HDMI 1.1 version of HDMI was released on May 20, 2004, helping to increase support for the now obsolete DVD-Audio format.
The HDMI 1.2 version of HDMI released on August 8, 2005 adds many elements to the HDMI function, including:
• Support DSD or one-bit SACD source
• Type A connector for computer (PC) source
• Support low-voltage equipment
• Synchronization of home theater-oriented video and computer screen
The HDMI 1.2a version of HDMI released on December 14, 2005 has added functions for complete consumer electronics control (CEC) functions and testing.
The HDMI 1.3 version of HDMI released on June 22, 2006 adds the following content to the HDMI function:
• Increase the bandwidth to 340 MHz
• Support 30-bit, 36-bit and 48-bit color deep color (optional), which is a great improvement over the past standard
• Audio synchronization
• Optional support for Dolby True HD and DTS Master Audio decoding in external receivers and AV preamplifiers.
• Approve the use of C-type miniature connectors
The HDMI 1.3a version of HDMI released on November 10, 2006 adds the following content to the HDMI function:
• Improvements have been made to improve the connectivity of the miniature connector (type c)
• Signal source termination guide
• Modified the CEC capacitance limit
• Clarified the SRGB video range
• More audio command options
•Conformity test specification
The HDMI 1.3b version of HDMI was released on March 26, 2007, and it was hyped, but only the test of the HDMI standard was added. For consumers, the connection method is basically the same as HDMI 1.3a.
In the early HDMI function, HDMI switcher is very important, because most AV preamplifiers and receivers do not have any HDMI input at all. The switcher allows the system to accept multiple HDMI inputs and switch them directly to the video display device. Early switchers were two-input and one-output units. Larger 4x2 units became popular.
The switcher can still be used in traditional systems with a receiver and preamplifier without HDMI input. However, these switchers cannot pass audio formats on the same cable. For example, a Blu-ray player may output 1080p video through HDMI video, but output analog audio that requires 5.1 or 7.1 PCM audio to the AV receiver or AV preamplifier. Most older traditional AV preamplifiers do not have a 7.1 analog input.
Not all HDMI cables are the same. Although digital cables are inherently higher quality, HDMI cables can provide better connectivity, thereby reducing "handshaking" issues.
Most audio/video cables are made of copper, and HDMI is no exception. HDMI is stable and reliable, up to three meters long. At longer lengths, in addition to the best quality copper cables, if there is no amplification "obstacle", the copper HDMI cable will not work properly.
For very long 1080p (or higher resolution) video information, it is important to treat fiber optic cables as a more expensive but stable alternative. Fiber optic cables can handle higher bandwidth data transmission than copper cables.
Nothing irritates consumers and home theater installers more than HDMI’s frightening handshake problem. The overall design of HDMI has always been a nightmare. Due to frequent software/firmware changes, lack of communication between developers and AV companies, and other negative issues, it should have led to some form of public uprising.
In theory, HDMI should provide a perfect single-cable connection for all AV devices that send high-definition audio and video over affordable, high-performance cables. It should be so simple and reliable that every consumer and retailer/installer happily accepts the fact that content sent via HDMI is often protected by copyright. In fact, the HDMI compatibility version of the audiovisual equipment is different, so you can connect the HDMI 1.1 first-generation Blu-ray player to the HDMI 1.2 version AV receiver, and then plug it into the new HDMI 1.3b video display device. The system may work on the first try, but because of these copy protection issues, you may later discover that there are intermittent issues (or no issues at all). These are due to handshake issues.
Note: Non-HDCP copy-protected components (such as DVD video players with HDMI or satellite receivers) rarely suffer from HDMI handshaking issues. The newer copyright-protected components are also better than the first-generation players with serious flaws.
1. Restart the gear. Surprisingly, this works. I hate the Indian guy who sounds like a cable company call center, but your home theater system is more and more like a computer, but it doesn’t restart as often as it used to. Sometimes, just a simple power cycle can solve your problem.
2. Update the firmware. As HDMI compatibility issues prevent audio-visual manufacturers from working late at night, they need to download new firmware to solve the problem. A spinning DVD burned from a computer can make things perfect all at once.
3. Not all cables are equally divided. For long-distance operation (more than one or two meters), please use only high-quality HDMI cables. Some people are better than others.
4. Keep the system simple. Adding switchers and extra junk to HDMI-based systems will make things more likely to fail. Run audio and video from Blu-ray and other sources via HDMI to the HDMI input on the receiver, and then run from the receiver to the video display.
5. If there is a long HDMI cable between your receiver and the video monitor, please use an optical fiber cable. It is the best solution for performance and bandwidth, as well as for certain connection problems.
Deep Color is a future technology built into the HDMI specification. On HDMI 1.3b, 32-bit or even up to 48-bit video can be allowed through the HDMI cable. Note: There is currently no HDTV signal source that supports Deep Color.
But what is certain is that the number of 4K source devices is gradually increasing. When typing this, there are two (
with
), a Roku 4 (Roku 4) that just arrived at my door and a second-generation Amazon Fire TV on the road. Of course, Ultra HD Blu-ray players are just around the corner.
Given that there are a large number of new AV receivers and preamplifiers that support 4K, it is very easy to switch these sources for viewing on one or two display devices. On the other hand, if you are looking for a way to send multiple sources protected by 4K/60, HDCP 2.2 to multiple displays around your home, office or commercial space, the options will be more limited, but still More and more.
Atlona provides new HDMI-to-HDMI and HDMI-to-HDBaseT matrix switchers that support 4K/60, which can always reach 16x16. The focus of this review is the 4x4 UHD HDMI to HDMI matrix switcher (AT-UHD-H2H-44M, $2,099.99), which allows you to display four different AV sources simultaneously on four different display devices. All four HDMI inputs and outputs on this product are HDMI 2.0 compliant with HDCP 2.2.
The device itself is a basic black box, measuring 2.17 x 17.31 x 10 inches and weighing 6.55 pounds. It is a rack unit high with rack ears for installation in equipment racks. The back panel has four HDMI inputs and four HDMI outputs, as well as a control input for IR/RS-232, a (currently inactive) USB port for firmware update, and a LAN port for IP control and access to the Web GUI .
You can perform all basic settings and use functions from the front panel with eight buttons as needed: power, input, function, cancel and four buttons for input, output and navigation functions. The two-line LCD screen displays the product name and description, which are used to select input/output combinations, access firmware/IP information, and perform various setting functions.
The infrared remote control provided is obviously a universal model that Atlona uses with many of its switchers. The small, non-backlit remote control has 16 input buttons and 16 output buttons. Obviously, with this particular switcher, you will only use the first four of each switcher to assign specific inputs to specific outputs. It also has power on/off, volume up/down and mute buttons, which are invalid for this particular switcher.
AT-UHD-H2H-44M uses a 10.2 Gbps HDMI chipset instead of an 18 Gbps chipset-this means you can transmit 4K signals at 60 frames per second, but the maximum bit rate can only reach 8 bits, the maximum sampling The ratio is 4:2:0. However, you can still transmit 4K signals at 24 frames per second, with up to 12-bit color and 4:4:4 sampling rate. For any current UHD source devices I use to test Atlona, this is not a problem, because 8-bit 4:2:0 is the current way to encode content. However, with the emergence and development of the Ultra HD Blu-ray format, it will become a bigger problem because the format supports higher bit and sampling rates. More importantly, AT-UHD-H2H-44M does not support HDMI 2.0a to deliver high dynamic range (HDR) content, so firmware upgrades are not possible. It can be seen from my research that all new 4K matrix switchers cannot pass HDR.
In terms of audio, Atlona can deliver all major audio formats, from two-channel PCM to Dolby TrueHD, DTS HD-MA and Dolby Atmos. It supports the passage of audio signals up to 24-bit/192 kHz.
In the test, I used three 4K UHD display devices: Samsung UN65HU8550 TV, Samsung UN65JS8500 TV and Sony VPL-VW350ES projector. I sometimes add an older 1080p Samsung LN-T4681F TV to the mix. My source of information is the aforementioned Nvidia Shield and Sony FMP-X10 4K player, Oppo BDP-103 4K upconverter Blu-ray player and 1080p Dish Network Hopper DVR. Both Nvidia and Sony devices support 4K/60 output, which is what I input to the monitor through Atlona. Both use HDCP 2.2 copy protection, and the Atlona switch has no problems with this.
Atlona equipment should be set up through a trained professional distributor. I am not one of those dealers, and because I use a mix of 4K and 1080p sources, the setup is more complicated than simply connecting all the devices and turning on the switch. By default, this Atlona switcher is set to output all content at the highest common native resolution that all connected sources can output. Since my Hopper DVR can reach up to 1080p, and my Oppo Blu-ray player was set to 1080p output when it was first connected, Atlona downgraded Nvidia and Sony 4K devices to 1080p to match them. I just tried to exclude Hopper and Oppo from the equation and restart all functions to see if I can get 4K signals from Nvidia and Sony, but I didn't.
The Atlona user manual provides you with two methods to solve this problem. The first is to manually "copy and load" the EDID information from a specific display and assign it to a specific source input. EDID stands for Extended Display Identification, which is used by two HDMI devices to identify each other, determine compatibility, and establish the most important handshake to obtain pictures. I tried to follow the instructions for this method, but still didn't get 4K from Nvidia.
Therefore, I moved to the second option, which is much simpler. The switcher stores 14 EDIDs in its memory, and you can assign any of these presets to a specific input. In my case, I assigned the EDID number 14 (3840x2160 resolution and 7.1 multi-channel audio) to the input of Sony and Nvidia players, and this quickly worked. Since then, I have been able to switch the resolution of Oppo from 1080p to 4K via 4K 4K sources, 1080p 1080p sources, and then return without problems.
What I should mention is that I performed the above steps through Atlona's front panel buttons. Although this button works, it is certainly not the fastest or most intuitive solution. If you move to the web interface only during the initial setup and not during the initial setup, I suspect the above process will be faster.
To access AT-UHD-H2H-44M's Web GUI, all you have to do is to make sure the product is connected to the router via Ethernet, enter the web browser, and enter the IP address assigned to Atlona. (You can get this information directly from the front panel screen of the switcher). The Web GUI has a simple and clear layout, which is easy to understand and manipulate. Through it, you can check the status of the device, update the firmware (although the firmware must be downloaded from the company site to the computer, and then load the file through the Web GUI), adjust the network and control settings, and more. You can name all connected signal sources and displays, check which signal source is routed to which display at any time, configure and store different input/output combinations in the switcher’s memory presets, and perform all the EDID adjustments mentioned above .
From a performance point of view, the AT-UHD-H2H-44M has proven to be rock solid in sending a clean and stable signal from the signal source to the display. I basically spent a few days playing various combinations of 4K/60, 4K/24, 1080p, and 1080i signals through the connected monitor, sending different sources to different monitors randomly. I didn't see the image being lost, freezing or flickering, and the switcher changed the input very quickly. When I turn on or turn off the power of any device in the chain, it does not affect the signal to the other displays. I can pass 3D smoothly (provided that the EDID that supports 3D is assigned to the input of the Oppo player), and even successfully add my Actiontec MyWirelessTV wireless HDMI extender to the chain to send 1080i/1080p signals to 1080p remote TV in the room. Atlona successfully passed DTS-HD Master Audio, Dolby Digital, Dolby Digital Plus and two-channel PCM signals.
• This matrix switcher allows you to watch four different 4K/60 signal sources on four different display devices at the same time.
• The signal reliability is excellent, and the switching speed between signal sources is very fast.
• Provide IR, RS-232 and IP control options.
• The web interface is easy to access and use.
• You can add Atlona's UHD-EX series extender to extend the cable length, which supports HDMI over HDBaseT.
• AT-UHD-H2H-44M only provides 4K/60 support, supports up to 8-bit 4:2:0 sampling, and cannot transmit (or transmit through firmware upgrades) HDR signals.
• If you mix 4K and 1080p sources, the initial setup process may be a bit confusing, and Atlona's documentation is more for trained installers than for general consumers. Of course, this product should be sold and set up by trained installers, so it makes sense.
• This switcher does not provide optical, coaxial or analog audio connections for use with non-HDMI audio devices.
Other 4K-friendly 4x4 matrix switchers include
(Approximately US$1,200), it adds support for analog/digital audio, but requires the addition of a KD-HDFIX22 HDMI extender (US$350) to incorporate HDCP 2.2 signal sources. Geffen provides 4K/60 capabilities
The 4x4 matrix switcher ($899) supported by HDCP 2.2 is missing, or you can check out the new EXT-UHD-88 ($3,999), which is an 8x8 matrix switcher with 4K/60 capabilities of HDCP 2.2. The company has not yet released a 4x4 version of the newer model with HDCP 2.2. coming soon
A 4x4 matrix switcher supporting HDCP 2.2 ($1,998). It is the only chip on the list that will use the 18-Gbps chipset to support 4K/60 at 4:4:4.
Control companies like Crestron and Control4 also provide 4K-friendly matrix switchers, but their products are usually designed for large systems, starting with 6x6 or 8x8 configurations, so the price is higher. Control4 offers 6x6 LU642 for $6,000, and Crestron offers 8x8 DM-MD8X8 for $4,300.
Atlona AT-UHD-H2H-44M 4x4 HDMI matrix switcher provides fast, rock-solid 4K/60 video switching, and supports the latest HDCP 2.2 compatible 4K source and a beautiful web interface. This matrix switcher can meet your current 4K signal source needs, and the performance is very good, but as Ultra HD content develops to its maximum potential, its 10.2 Gbps chipset may not be able to meet your needs.
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Published in the May 1, 2015, Friday, Author:
The latest addition to HDanywhere's mHub series is an obvious signpost for its monicker, which supports 4K, but this is not the only noteworthy aspect of this smooth matrix. The HDBaseT-Lite switcher provides a simplified design and adds some cool new features, including a PoH receiver and webOS software platform.
Recently, HDanywhere has truly discovered its design magic. The incoming layerCake AV distribution system was inspired, but even this more modest box is a step beyond the original mhub's unapologetic function. Anterior fascia acne is gone forever. Instead, we have a sleek white polycarbonate front panel with a low-key legend and backlit logo.
The size is a standard 19-inch rack-mount chassis (size 43 x 4.5 x 14cm w / h / d). It is actually only about half of the 1080p mHub and weighs only 2.05kg (although the PSU is very bulky).
The four HDBaseT-Lite receivers provided are also far away from the small metal box we saw before. They are made of polycarbonate, cast in blue and have a beautiful graphic logo, with a Cat input on one end and an HDMI output on the other. Four IR TX and matching RX minijack buds are also provided in the box. There are also famous British-made brands, which are always reassuring.
The matrix itself provides four HDMI source inputs and four HDBaseT-Lite Ethernet outputs, two of which have mirrored HDMI outputs. By the way, the Ethernet port and HDMI pairing here are very suitable. My normal HDMI plug has to withstand the uncomfortable commuting squeeze to fit the requirements. That said, HDanywhere's SlimWire Platina HDMI cable and its slim hood proved to be the perfect choice – there was a lesson somewhere.
One of the biggest changes is the ability to manage the matrix from the browser web interface. This is a function handed down from the all-blue Modular matrix, as is the HeartBeat remote monitoring. The remote login function can save a lot of marking time. There is also a complete configuration on the board. The matrix provides CEC control of connected hardware, shortened switching time and HDBaseT cable diagnostics.
There is no doubt that this is a powerful toolkit. It can provide 4K 2160p video up to 40m and Full HD video from 1080p to 70m from four source devices to four connected displays.
Set up and configure through the above web interface. Download the brand's mHub network tool, and then run the tool to identify the devices on the network. By opening the webOS UI in your browser, you can rename and configure connected sources and outputs, as well as access monitoring and feedback tools. The small blue receiver provided is a dream to use. Their size is only 5.5 x 3.8 x 10cm (w/h/d), plug and play. The matrix also supports bidirectional IR and has a global IR port for integrated AVR control.
Of course, the question is, what kind of 4K content do you intend to use it for? mHub 4K matrix supports multiple 4K resolutions and frame rates: 3840 x 2160 @ 30Hz, with 4:4:4 chroma sub-sampling; movie specifications 4K 4096 x 2160 @ 24Hz 4:4:4, plus 4K 3840 x 2160 @ 60Hz, but with 4:2:0 chroma subsampling. Need to use Cat 6a or above cable for signal transmission. But there is a caveat. The matrix does not provide HDCP 2.2 support.
Obviously, there is currently almost no (ie almost no) commercial 4K content. You can use cameras such as Panasonic G4 or home camcorders such as Sony FDR-AX100e or Panasonic HC-X1000E to shoot your own 4K material. Although many people are doing this, we are still some distance away from pay TV Services (BT and Sky) or UHD Blu-ray will be available soon. Of course, the situation may change drastically in just six months.
However, we do have a source: Sony's FMP-X5. This is a standalone HEVC media player with a Netflix 4K client. It is designed to work with Sony's 4K projector series and some Sony 4K UHD TVs. So, what happens when X5 is routed through mHub 4K? Actually not much. The media player immediately knew that it was not connected to HDCP 2.2-enabled HDMI and threw an "incompatible" text screen. It is almost certain that all commercial services will adopt HDCP2.2 copy protection, which foreshadows what will happen in the future and limits mHub's 4K 2160p aspirations.
A wide range of control options. There are IP or RS232 control drivers for AMX, Control 4, Crestron, Savant, RTI, URC, Fibaro, Loxone and Demo Pad. You can also take real-time snapshots of cable diagnostics through performance feedback to help assess the type of cable infrastructure you are dealing with.
Overall, mHub 4K is impressive. Even if 4K is excluded due to these annoying HDCP 2.2 issues, you can still get a complex matrix that can provide more features than regular 1080p models. The webOS UI is very simple and the design of the HDBaseT-Lite receiver is excellent. Precautions may apply, but in any case, this is a reasonably priced kit.
HDanywhere mHub 4K 4x4 matrix is now available.
Price: £2,000
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In-house CI editor Steve May (Steve May) is a freelance technical expert who also
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HDR-H2H-88MA is built on the performance, reliability and integrator-friendly features of the Atlona 4×4 model. It has extended input and output capabilities and can be used for larger-scale applications.
Atlona has once again expanded its comprehensive range of AV integrated solutions compatible with high dynamic range (HDR). The AT-HDR-H2H-88MA matrix switcher is immediately available to provide high-performance 4K/UHD signal switching with a space-saving 1RU design, including HDR format. The new switcher will be on display at InfoComm, and the company will continue to celebrate its 15th anniversary.
HDR-H2H-88MA is the 8×8 brother product of Atlona AT-HDR-H2H-44M matrix switcher. It is built on the proven performance, reliability and integrator-friendly features of the 4×4 model. With expanded input and output capabilities, larger size applications can be provided. Supports all video resolutions, audio formats and color spaces in the HDMI 2.0b specification, so as to be compatible with the latest 4K/UHD and HDR signal sources and displays and future HDR broadcast services, while complying with HDCP 2.2 to switch protected content.
HDR-H2H-88MA supports 4K/UHD video at 60 Hz, and has 4:4:4 chroma sampling and HDMI data rate up to 18 Gbps. Fast, flicker-free switching eliminates long waiting times and visible display artifacts, thereby enabling an uninterrupted viewing experience. Stereo, unbalanced audio output is paired with each HDMI input so that two-channel PCM audio can be de-embedded and sent to the entire house or commercial audio system.
HDR-H2H-88MA starts from the intuitive front panel buttons and built-in LCD menu display, and provides many easy-to-use configuration and control methods. The integrated web interface allows quick, menu-based configuration of the menu from a PC or mobile device, and is compatible with the free Atlona management system (AMS 2.0) software and the Atlona Velocity AV control platform, and can be fully remotely configured and controlled via IP And monitor the network. HDR-H2H-88MA can also be controlled via RS-232 or the included handheld infrared remote control.
HDR-H2H-88MA is very suitable as the core of residential or commercial AV distribution installation, or can be used as a local sub-switch in the design of large commercial systems. The matrix switcher is seamlessly integrated with one or more Atlona AT-HDR-EX-70-2PS HDMI extenders, providing powerful multi-rooms for environments ranging from HDR-enhanced home theaters to retail showrooms and detail-intensive professional AV environments 4K signal distribution application. The switch's rich integrated functions include EDID and HDCP management functions, as well as the ability to independently send CEC signals to each HDMI output to control a single target display.
Joshua Castro said: "Our 4×4 HDR-H2H-44M is very popular among system integrators and end users. We are very pleased that we can now provide similar advantages in 8×8 matrix switchers to meet the needs of those who have more The needs of people with big distribution needs." Atlona Product Manager. "HDR-H2H-88MA's flexible format support allows users to take full advantage of HDR-enhanced content, while its rich integration functions can be seamlessly integrated into any environment or system design."
The HDR-H2H-88MA is now shipping and is backed by Atlona's award-winning 10-year limited product warranty and customer support services.
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