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Two new
The Evolution HDMI fiber optic extender supports multiple control methods and extends 4K HDR resolution to extremely long distances.
EVEXFBR1 with two-way IR and RS-232 and EVEXFBK1 with KVM added via USB 2.0 pass-through are designed to extend 4K HDR video and audio signals through multi-mode fiber optic cables and a distance of 6.2 miles/10 kilometers, with a maximum distance of 984ft/300m through single mode Optical fiber cable makes it suitable for expanding AV through HDMI of any size or scale.
[
]
The Vanco EVEXFBR1 HDMI fiber optic extender includes two-way IR (20kHz to 60kHz) for source and/or display control, and RS-232 pass-through for additional control. EVEXFBR1 includes two power supply units for sending and receiving.
The transmission unit is used to capture HDMI input with control signal and transmit the signal through multi-mode or single-mode fiber optic cable. The receiving unit is responsible for equalizing the transmitted HDMI signal and reconstructing the IR signal. The box also contains multi-mode fiber optic modules and control cables.
Vanco EVEXFBK1's HDMI optical extender includes bidirectional IR (20kHZ to 60kHz) and RS-232 (such as EVEXFBR1), and also provides USB 2.0 KVM pass-through.
No need to run a separate production line or other expanders just for KVM control, EVEXFBR1 provides the option to control a secure NVR/DVR, computer, NAS system or any other components controlled by USB.
EVEXFBK1 also includes sending and receiving units.
The transmission unit is used to capture the HDMI input and connect the USB and control signals to the USB host (computer, DVR/NVR, etc.) through a multi-mode or single-mode fiber optic cable.
The receiving unit is equipped with two USB ports, which can connect USB peripherals, such as a keyboard or mouse, to equalize the transmitted HDMI signal, and rebuild IR and RS-232 signals.
EVEXFBRK1 comes with a multimode fiber optic module, a control cable, and for convenience, a USB 2.0 cable is also included.
Both models include multi-mode SFP modules and support
4K@60Hz, 4:2:0 chroma subsampling and 10-bit color, as well as HDR10, Dolby Vision and HDCP2.2.
Vanco International Product Development Director Brandon White (Brandon White) said: "Our two new HDMI fiber optic extenders are simple and cost-effective solutions that include everything you need. "For integrators who are concerned about EMI, They hope to extend the latest high-bandwidth audio and video standards over long distances. There is no better choice than the EVEXFBR1 and EVEXFBRK1 HDMI extenders. "
Vanco Evolution EVEXFBR1 and EVEXFBRK1 HDMI extenders are available for pre-order now and will start shipping in December. Interested distributors can contact Vanco International directly for pricing.
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Aviation progress for more than four decades.
From stealth super fighter jets to complex jet airliners, the past 40 years have brought huge leaps in aviation technology. These advanced, light and efficient winged wonders are destined to become unprecedented greats, and some of them will undoubtedly be difficult to lift off. These are the most attractive aircraft in the past 40 years, with unconventional, unmanned or unstoppable characteristics.
Branch of
, The expander can carry cargo, troops or up to 356,000 pounds of fuel. The four crew members of the Extender work far away from home, and can refuel the fighter jets with a telescopic "flying boom" installed under the tail.
Popular in the 1980s, this multi-faceted "stealth fighter" was designed to evade enemy radar and deploy to
There was almost no warning when the bomb hit the target. F-117 flew into Baghdad on the plane
Attacked a command and control facility highly supported by Iraq’s national defense.
This
It is a branch of Northrop's very successful F-5 freedom fighter. Although the Tiger Shark is considered an outstanding aircraft by most of the aviation industry, the Pentagon chose a larger and more complex fighter program and only built three F-20s.
When airline passengers talk about bringing the "puddle jumper" to major airport hubs such as Atlanta or Chicago, they often fly in the old Dash 8.
, An example of a twin-turboprop aircraft area passenger aircraft can be used with an aircraft carrier
.
The X-29 has a unique forward-swept wing that can be identified immediately. As an experimental test platform for high-tech composite materials, basic airframe design and computer-controlled flight systems,
. The onboard digital flight computer corrects its flight path up to 40 times per second to prevent it from rolling down.
Faster, bigger and wider than its predecessor, Gulfstream IV
After the introduction. Although built for civilian and corporate transportation, some Gulfstream IVs still provide services to the military and can tow cargo and VIPs. An example of a jet plane, nicknamed "Gonzo", was piloted by the National Oceano and Atmospheric Administration
.
"Starship" will completely change the way commercial flying. Its eye-catching composite fuselage, twin-propeller turboprop aircraft and high-tech cockpit have amazed the entire industry, but the market timing is terrible and silly
Many buyers were scared away. Only 53 spaceships were built.
A pair of modified 747 airliners served the U.S. Air Force in the form of VC-25s. Each plane is
, Meeting rooms, two kitchens and multiple seating areas. When the President flies on any VC-25 aircraft, its radio call sign changes to "Air Force One."
The "Miria" built to carry Soviet spacecraft is
When it first took off in 1988, the An-225 was equipped with 32 wheels and 6 turbofan engines, and could still carry 550,000 pounds of cargo per flight. Recently, Mriya shipped a large number of COVID-19 medical supplies from China to Europe.
The boomerang-shaped B-2 can be invisible
Conventional bombs or nuclear bombs are sold anywhere in the world. With the help of aerial refueling, the Missouri-based "Spirit" has been flying towards targets in Kosovo, Iraq and Afghanistan without interruption for nearly two days.
First flight in 1990,
It is a mobile, stealth and versatile fifth-generation jet fighter. The Raptor was built to control enemy aircraft in air combat, or to carry two 1,000-pound bombs to eliminate ground targets. The U.S. Air Force now has 183 Raptors in service with the squadron.
The heavy Globemaster III cargo aircraft can carry a 69-ton M1 Abrams main battle tank, 170,900 pounds of equipment, or the highest
. Although the C-17 has a huge cargo capacity, it is built to operate on a small original airport and can travel 2,400 nautical miles without refueling.
The aviation industry is crazy about the idea of a civilian jet plane
. Jim Bede’s dream of building small fighter jets at home has become a reality, and most of the first examples of the BD-10 that were touted at the time suffered disturbing design flaws and many Fatal crash.
The first example of Cessna’s newly designed business jet is
. Considered to be one of the top "business aircraft" of the era, the Citation X aircraft
Aircraft from Target, General Motors and Honeywell are part of Netjets' large fleet and are owned by companies such as Sydney Pollack, Steve Fossett and Donald Trump.
The Eurofighter Typhoon is a joint venture between four European countries (Britain, Germany, Italy and Spain) and is the master of the melee. The agility of the aircraft is its product
, Its delta wing profile, distinctive nose-mounted duckbill and a pair of powerful afterburner turbofan engines.
The Super Hornet is a larger and worse version of McDonnell Douglas' F/A-18 Hornet, designed to do just that. The updated F/A-18 Super Hornet bristles are equipped with missiles, bombs and
. Today, it has become the Navy's choice for air superiority, reconnaissance, aerial refueling and ground attack missions.
Burt Rutan's weird and fashionable boomerang makes almost everyone look twice. 202's asymmetrical design allows it to remain obedient even when one engine is stalled
While using a smaller engine than traditional airplanes, this strange airplane can also fly faster and farther than traditional airplanes.
Retro design
In the 1930s, Lionheart's homemade aircraft used newer technology and materials to improve the beloved old classic aircraft. Powered by the same basic engine as Staggerwing,
More stylish, faster, and can fly farther. Only a few of them are built.
Designed to extinguish fires, the amphibious Altair has a boat-shaped belly and a double-height wing fan mounted above the wings. The Be-200’s tank can
The plane can then land on a lake or sea and take up another load in just 14 seconds. General purpose aircraft can also be configured for cargo, passengers, and even used as flying ambulances.
Helios’ first flight was in 1999,
Suitable for unmanned aircraft powered by solar energy and fuel cell systems. The exquisite Helios aircraft has an amazing wingspan of 247 feet and is driven by 14 brushless DC motors. Later, the experimental aircraft disappeared
During a flight in 2003
In order to keep up with the rapid development of western aviation technology, Russia’s Mikoyan Design Bureau slowly developed a
Designated item 1.44. After the Kremlin conducted its first test flight in 2000, it quickly discovered a list of defects and engineering problems, and then boldly abandoned the plan.
The predator is unmanned and unarmed, can fly for several hours, and is monitored from above using sophisticated cameras and sensors. Later versions of drones moved from reconnaissance missions to powerful hunter roles.
, Which allows the aircraft to transport bombs or missiles to hostile territory.
The days when all fighters are expected to be unmanned,
Developed experimental X-45. The stealthy flying wing can carry up to 8 bombs in an internal weapon bay, which can destroy heavy defensive targets without causing any danger to the pilot.
SpaceShipOne is destined to be the first private space plane, making its first flight in 2003-first taxiing, then rocket power. The second year, the craft
Because it stayed briefly above the atmosphere and entered the record book.
When Saeqeh arrived at the scene, it caused confusion. Aviation journalists and evaluators quickly noticed Iran’s new super fighter
By the 1970s, the outdated American-made Northrop F-5 Tiger was sold to the country. Iran's claim that "Saeqeh" is not only comparable to the most advanced fighter jets in the West, and it has not been confirmed so far.
Another attempt to bring micro jet fighters to life,
Cooperated with an Israeli company and sold javelins with a price tag of $3 million as business jets and military trainers. But shortly after this stylish jet flew for the first time in 2005,
Crashed and burned.
The United States' latest combat multi-role fighter, the F-35, serves the United States Air Force, Navy, Marine Corps, and allies. Different versions of the aircraft can take off from regular runways,
, Or operate from an aircraft carrier. F-35 is expected
.
This little
It was tested in the waters of Lake Constance in 2007. This is the dream of athletes. The German-designed S-Ray can fly almost anywhere (land, sea or air). The stylish carbon fiber concept aircraft is powered by engines mounted above its two-seater cockpit.
The White Knight 2 was built specifically to lift the Virgin Galactic space plane to a launch altitude of 50,000 feet. It is a large mothership powered by four turbofan engines. Studies have been conducted to determine whether the aircraft may also be
And was hired to extinguish forest fires.
The fuselage of the 787 is the most modern passenger aircraft in the world, with a carbon fiber content of 50%. Compared with earlier passenger aircraft, it is lighter in weight and more fuel efficient. Internal innovations include an improved pressurization system, more luggage compartments and
Than standard airliner
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Google Fiber is about to provide 2Gbps service at a price of $100 per month. The service package includes a Wi-Fi 6 router and a mesh extender, and an ISP owned by Alphabet
yesterday.
Google fiber to the home service
As many people hope, but ISPs are still making improvements in cities that do provide broadband. The download speed of the new product is twice the download speed of Google Fiber's standard 1Gbps service, while the price is $30 higher. The new download speed is 2Gbps, and the upload speed is 1Gbps.
In addition to fiber to the home, Google Fiber also provides wireless home Internet access in certain cities through the Webpass service. The announcement stated that even the Webpass wireless service will receive a 2Gbps plan.
Today's range is from 100Mbps to 1Gbps.
2Gbps service will initially be provided by some customers of Google Fiber
It is scheduled to be released next month and is scheduled to be promoted in "most" Google Fiber and Webpass markets in 2021.
The router and mesh extender will be included in the price of $100. Google Fiber is called "
. "
1Gbps is enough for most people, and there are
You can't even access anything remotely. But Google Fiber hopes that a large number of users will be interested in it.
"Why 2 Gig? This year, the need for speed and bandwidth has become particularly urgent, because many of us have been working all our lives, from work to school to entertainment, all in our homes, which has had an unprecedented impact on Internet capacity. Demand," Google Fiber Announcement stated.
The details of the schedule are ambiguous, but the following is Google Fiber about 2Gbps availability and how to register:
We are looking for someone to help us test 2 Gig, starting next month in Nashville and Huntsville, and testing in our other Google Fiber cities later this fall. Game changers, super users and families who need more Internet resources can join
This program became one of the first to use extra speed...Register
Have the opportunity to be the first opportunity to test 2 Gig in your city.
2 Gig will be launched to all our Nashville and Huntsville customers later this year, and plans to launch the service in most of our Google Fiber and Google Fiber Webpass cities in early 2021.
You can also visit
And enter your email address and street address to get the latest information on when 2Gbps is available. Google Fiber provides fiber or wireless services in 19 U.S. markets; you can
.
you must
comment.
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Welcome to the notable deals, Gear Patrol will capture all the best deals of the day. You can also follow all of our transaction information in the "Transactions" section.
DUER jeans are breathable, lightweight and durable, making you look beautiful and free to move. With this deal, add some of the most comfortable pants to your spring wardrobe-use code GP at checkout.
ReGeneration is a special choice for Knoll's ergonomic office chair. It is almost essential to place office chairs at home these days, and this choice of Nuoer would be a good choice.
Sony’s latest and greatest WH-1000XM4 has active noise reduction, unrealistic 30-hour battery life, touch sensor buttons, and wear detection that can pause playback when disassembling. Considering that they have been refurbished, this is one of the best prices we have seen on this set of headphones.
This hunting style waxed jacket is one of Flint and Tinder's best products. The waxy cotton shell makes it naturally waterproof, and it uses a flannel lining made by Abraham Moons, one of the oldest mills in the UK, to bring you warmth.
Thankfully, it's time to start wandering outside. This Adirondack chair uses one of the most classic outdoor chair silhouettes, and is slightly twisted to make it unique, so it is deeply loved by us.
As part of our best mattress guide, the Casper Original mattress is our choice for choosing the best mattress for side sleepers. This is the one who created everything for Casper, no matter how you sleep, it is still a good choice.
Roku uses streaming technology and combines it with sound bars to provide you with an all-in-one experience. At this price, if you want to add soundbars and streaming to your TV, but don't want to use one of the more expensive speakers, this is a good choice.
We can't really look away from this table. With the development of WFH in the future, buying a beautiful desk for your house is not a small price. The design in the middle of this century can be used with almost anything.
Medium insulated jacket is a must-have item in every outdoor sports enthusiast's wardrobe. This product from The North Face has multiple functions, including DWR surface treatment that can withstand light rain, insulating materials that can be recycled after consumption, and can be packaged for easy storage (or used as a travel pillow).
The double-layer vacuum insulation allows you to fill coffee with hot coffee in the morning and exchange ice water in the afternoon. The lid is a game changer-it has an easy-to-carry handle and an ingenious magnetic top cover that will not block when opened, but is leak-proof when closed.
Patagonia knows outdoor gear-since the company founder Yvon Chouinard started making climbing gear at home in the late 1950s, it has been one of the industry leaders. This jacket is made from a recyclable wool blend, making it a super comfortable three-season jacket.
As we approach the outdoor picnic season, every day provides another opportunity for you to increase outdoor seating. This rattan group is moderately priced, can accommodate four people, and has a coffee table, which is perfect for drinks and hot dogs.
Patagonia knows outdoor gear-since the company founder Yvon Chouinard started making climbing gear at home in the late 1950s, it has been one of the industry leaders. This jacket is made from a recyclable wool blend, making it a super comfortable three-season jacket.
Arc'teryx makes some of the best outdoor technical equipment-and there are also important moments on the street. No matter where you exercise, this hair dryer keeps you warm with 850 down filling and Coreloft insulation.
The most important thing when packing-whether it's a one-month holiday or a weekend backpacking trip-is efficiency. These packaging cubes from Eagle Creek are one of our selection of the best packaging cubes.
Spring is here, and we are working hard to consider our next trip to the wilderness. In terms of backpack equipment, a high-quality sleeping pad is one of the most important parts of your backpack, so it is best to choose a high-quality sleeping pad. When the ground gets cold, this insulation pad can keep you warm and comfortable.
Merino wool is the ideal material for almost any season-it can adjust the temperature, so it performs well when the temperature changes from cold to warm, ensuring you stay comfortable. Rhone manufactures some of the best technical equipment, so it is a hot deal to snap up in sales.
Bison Ultralight uses half the bison fiber and half the wool, weighs less than a pound, and has excellent insulation. It also uses a recyclable, tear-resistant shell without PFC DWR coating, and can be compactly folded into its own pocket.
Being trapped at home makes you dream of traveling outdoors? So are we. This ultra-light backpack is perfect for overnight or weekend trips and is the salve you need. It also has some easy tracking features, such as Osprey's Stow-on-the-Go carry-on pole and 3-D mesh back panel that provides comfort and breathability.
Best Made is back, offering some of the best works at discounted prices. This 850 padded down jacket will keep you warm, no matter how cold it gets, and it looks good. It is a perfect fusion between style and mature GORP.
Hydro Flask does not need to be introduced at this point, so you can do so when you get a 32-ounce wide Temp-Shield insulation with a 31% lower mouth.
This is one of the best fire pits you can buy. It is very suitable for lighting a fire at home or in a car camping. Thanks to its airflow technology, it produces much larger smoke than you are used to, so you avoid inhaling harmful air and smell like an ashtray when you leave the stove.
We just found your favorite golf and tennis polo. Lululemon wears some comfortable sweat-wicking and quick-drying technical clothing, and it looks good.
This is one of the more affordable massage guns we have seen. It comes with six unique attachments and has 20 speed options to ensure you can get the best and most personalized recovery.
As an upgrade to Gear Patrol's favorite Nano 9, Nano X doubles all the advantages of previous iterations and makes it even better. This is the best choice of CrossFit and HIIT fitness shoes we can choose. Quick shopping-limited sizes.
These waterproof and sweatproof earplugs are our selection of the best fitness earplugs. They have a battery life of 6 hours and have passed the MIL-STD 810G certification, which means that they have passed repeated shock, vibration, drop and squeeze tests, and have been exposed to tropical humidity, hurricane water and desert dust storm conditions for a long time. under.
With more and more fitness at home, you need to use mats to soften the surface, prevent slipping and protect the floor. It is very cheap to get a mat at a 50% discount, and REI only price it for one day.
Nike React has a proprietary foam that provides a high level of cushioning and energy feedback. Save more than 60 US dollars, you can meet your basic needs of New Year's fitness.
The TRX, designed by the commander of the Navy SEAL squadron, is still one of the best home exercise systems, and considering its competitors in this category, what it is saying. This bundle includes everything you need to do at home, as well as TRX's Rocker (foam roller), which is very torturous.
With TPE on one side of the cork and TPE on the other, you will have a durable mat that is naturally antibacterial, which means that it will prevent the growth of bacteria while still easily disposing of sweat. Your home floor (and ultimately the studio) needs to be protected and you need to be comfortable, so you should carry a yoga mat with you during quarantine, in case you need it.
This sports bag seriously meets all your daily needs: shoe box, laptop cover, ventilated mesh main compartment, water bottle bag, separate compartment for storing clean clothes, and even 900D Cordura on the outside. To protect your belongings.
This hunting style waxed jacket is one of Flint and Tinder's best products. The waxy cotton shell makes it naturally waterproof, and it uses a flannel lining made by Abraham Moons, one of the oldest mills in the UK, to bring you warmth.
These can be said to be the most classic jeans ever. There must be a good reason for the perfectly fitted 501-it looks good on everyone. Pick up a pair and snap them off like our ancestors.
The rugby jerseys are back, filling our closet again. Reigning Champ knows a thing or two about making quality clothing inspired by competitive sports-it's a heavier shirt, very comfortable and perfect for spring wear.
For decades, Adidas Sambas has been promoting its own shoes, and, like most things, they have appeared and attracted everything from Jonah Hill to A$AP Rocky (A$AP). Rocky) The eyes of fashion people are everywhere.
This winter main shoe may just be the ideal choice for spring models? The price of $10 is definitely worth trying on those cool mornings, or pairing it with khakis to try the spring fashion sense.
Cardigan is one of the best clothes because it can be relaxed at will, and any clothes can be classified at the same time. Faherty knows one or two things about idle style, making it the softest staple in the company. In addition, Faherty is collaborating with Native designers and returning 10% for all indigenous-inspired designs.
When it comes to spring clothing, the Harrington jacket is one of the best. Over the years, you may have seen Steve McQueen and Daniel Craig wavering. Uniqlo is the crossroads of quality and affordability, and its version of Harrington is definitely worth the money.
A double meaning is the wallet design that we all know and love. Although it is slim and low-key, it can still protect all your cards and cash. This is made with leather from the Red Wing Tannery in Minnesota, which will only get better over time.
Its simple, direct appearance and ubiquitous appearance can perfectly match any sports shoes, so it is deeply loved by sports shoe fans and the majority of people. Stan Smiths can never go wrong.
Here, the perfect boots for spring. Todd Snyder always brings it in cooperation, and this is no exception. This outline comes directly from the Sebago Archives.
If you haven't played a headset game, you will definitely miss it. These provide a completely immersive experience, which is difficult to obtain. In addition, this pair of specific products has more than 24,000 reviews on Amazon.
Apple's premium AirPods are now hovering around $200, which is a large amount. Competition in this headphone category is fierce now, but the quick pairing and local integration with Apple devices still make AirPods Pro hard to beat.
It's time to buy TVs of 2020 models in bulk. Compared with the 2021 TV, any 2020 model will be perfect-much cheaper. This one has everything you want: 4K Ultra HD, Android and Google compatibility, and a 75-inch large screen.
The keyboard has a satisfying clicking sound and has a driving force of 50 G-perfect for gaming and typing. It also avoids ten keys, making it easier to move from the desk to the game table.
Due to the excellent design and first-class sound quality, these Bose headphones are Gear Patrol's favorite noise-canceling headphones in the past year. Don't you like this color? Both black and white are sold for $330.
Now, many of us only work at home, so Wi-Fi connections have never been more precious. Make sure that your entire home is covered by this Wi-Fi extender, which can extend the coverage to 1200 feet and connect 20 devices.
This keyboard is not your normal iPad keyboard. It is durable, easy to type, and has a trackpad that can do all the operations on the Mac trackpad. This is the ultimate upgrade of the iPad, especially at this price.
If you want to optimize the viewing experience, the accessory that may be missing is a high-quality HDMI cable. This one supports the best bandwidth and speed for games, streaming and HDTV.
This LG OLED smart TV has built-in Alexa, which is an ultra-fast a9 Gen 3 AI 4K processor, and emits the clearest blacks and colors you've ever seen on a TV. Now is the time to buy, because the brand is preparing to launch an updated model.
Thankfully, it's time to start wandering outside. This Adirondack chair uses one of the most classic outdoor chair silhouettes, and is slightly twisted to make it unique, so it is deeply loved by us.
Dyson makes some of the smartest home appliances, including its excellent fans and air purifiers. Both are available-the combination will come in handy during the allergy season and when the temperature rises this spring.
No matter what sleeping position you are in, Colyon by Sealy's Chill mattress provides excellent support and is infused with a proprietary phase change material that absorbs and dissipates heat.
This is the outstanding design and comfort of the mid-century, and it is one of the best selections of reading chairs you can buy. This is a chair that you can sink into.
Do you have separation anxiety on the standing stage in the office? In this way, any table or desk in the home can be turned into a standing desk. Now you can stop standing on the dressing table every day.
The HDMI 2.1 specification introduced compression through VESA’s Display Stream Compression, but what does this mean for integrators looking for the best cable?
Somewhere in the process, "compression" means
Technology has become a bad word. why? Over the years, the promotion of HDMI connections to an uncompressed state may have something to do with it. This part is related to quality, but mainly related to interoperability. But the situation is changing, and integrators should regard compression as their friend, which will increase functionality while reducing cable stress due to the ever-increasing demand for bandwidth.
Remember, the only truly uncompressed video we see comes from the graphics processing unit (GPU), such as video from a game console. All other content is delivered in compressed form. a lot of. Broadcasting, streaming media, optical discs, they are all highly compressed as sources, and then uncompressed to be transmitted through the HDMI system. I think we can all prove the extraordinary performance potential of these resources, so compression itself is not an issue for quality. Well, if it is not done well, but we should avoid doing it badly anyway!
The key is interoperability. The range of video compression methods and processing capabilities is very wide, and the devices must all be on the same page. In addition, many methods take some time to perform compression, which means waiting time. This is also a problem. Since its inception, HDMI transmission has been absolutely decompressed, so the device does not have to deal with this additional complexity, and always remains latency-free. But with the development of video, bandwidth becomes indispensable for every four times the resolution is increased.
This
This specification introduces compression through VESA's Display Stream Compression (DSC). This is an ultra-fast line code "sandwich" compression codec with a very light variable ratio ranging from 1.3:1 to approximately 3.5:1. I calculated the numbers and found that the delay is lower in two-digit microseconds at 4K/60. This is completely imperceptible and has no effect on image quality. By the way, this is the same codec included in the DisplayPort 1.4 and 2.0 specifications, and can also be used with HDBaseT 2.0 to achieve 18Gbps support.
Two things can be achieved by using DSC in HDMI transmission:
DSC is optional and automatic if supported, but only provided when needed-if the system can send uncompressed files in a given format, it can. The caveat about interoperability is that all devices from the source to the sink need to support DSC to work properly.
The only exception is any bit-accurate throughput without decoding HDMI signals; for example, a fiber extender with direct bit mapping doesn't care what is inside—it has nothing to do with DSC, HDCP, etc. The raw data rate is critical. However, for AVRs, etc., the situation is quite different, because they do decode HDMI signals. However, if such a repeater device does not support DSC, the source will not send it first (EDID will do).
DSC has been standardized for the HDMI specification, which is the first step to achieve interoperability. But for this, integrators need information to make informed decisions. This is where the manufacturers come in and disclose the importance of functionality through appropriate labels. In other words, what the product can and cannot do.
The HDMI Forum has proposed a method to disclose the DSC function-list each supported video format and append "A" (only for uncompressed), "B" (only for compressed) or "AB" ( Indicates that both can be supported at the same time). It is proposed to use it in the manufacturer's specification sheet and marketing to support it in the indicated format, but it depends on whether and how the manufacturer discloses the format. I hope such a list can indicate the available data rate of the device, so this information is only for explanation, not absolute.
For example, a device with 40Gbps capability may declare 4K/120AB and 8K/60AB (despite 4:2:0), but can only support 8K/120B because there is not enough bandwidth for uncompressed 8K/120. Therefore, at 40Gbps, 8K/60 4:2:0 media will be sent in an uncompressed manner.
However, this may cause confusion-assuming the media is 8K/60 4:4:4, it needs to be compressed and sent. From 4:2:0 to 4:4:4 is enough to make it exceed 40Gbps, so some knowledge and explanation are needed. In another example, suppose the media is 4K/120, but there is something (device or cable/extender, etc.) between the source and the sink that limits the bandwidth, and the link training protocol limits the link speed to 24Gbps. As long as all devices support DSC (and 4K/120B), the source must send compressed 4K/120.
This is just my opinion, but I think the marking convention is not complete because it only focuses on resolution and refresh rate, and cannot distinguish between 4:2:0 and 4:4:4/RGB or bit depth. What I really want to see is the obvious difference. For example, a device with 40Gbps capability and DSC is declared as capable of supporting 8K/60AB 10-bit 4:2:0 (may be uncompressed) or 8K/60B 10-bit 4:4:4 (compressed only).
As always, the availability of information and education to interpret the information are the keys to the successful implementation of the HDMI system. I encourage discussion around this topic, and consider the standardization of using DSC in HDMI systems, industry-wide labeling conventions.
And please remember to pay attention to the new CEDIA/CTA-RP28 (previously known as CEB28) HDMI system design and verification recommended practices, which is an important free industry tool that does contain information about compression in HDMI transmission. Watch this space, and thank you for reading!
David Meyer, a senior expert with 23 years of experience in imaging and A/V, is the technical content director of CEDIA. Meyer is a prolific writer, educator and subject matter expert, especially in the field of video and connectivity, having served on the (previously) CEDIA Asia Pacific Board of Directors twice. He is a professional member of SMPTE and IEEE engineering organizations.
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