Sunday 21 February 2016

The 19th Century plug that's still being used

The BBC are on of the most trusted news sources on the planet,  so when stories fly around about the next iphone dropping it's 3.5mm jack plug and moving to using their own lightning port or bluetooth. We think this is one of the usual stories that flies around before they release any new apple product, but when the BBC picks it up we take note! and this brilliant article shows that the common 3.5mm jack plug has a more of a history than we knew.



After rumours that Apple was going to get rid of the headphone jack in its imminent iPhone 7, more than 200,000 people have signed a petition asking them to reconsider. This humble plug is a rare example of technology that has stood the test of time, writes Chris Stokel-Walker.



For what remains an unconfirmed rumour, a lot of people are upset about the new iPhone. It's alleged that Apple will be scrapping the 3.5mm socket, instead leaving headphones to be plugged into the "Lightning" port - the company's own design of socket.

Cynics have pointed out that while this might enable iPhones to be slightly thinner, it will render many headphones useless and force manufacturers to pay Apple a fee to use their Lightning plugs on products.

The petition says Apple's purported move would "singlehandedly create mountains of electronic waste".

Two stereo audio jacksImage copyrightiStock
It will also be a blow for a piece of technology that has been remarkably resilient. The 3.5mm headphone jack is essentially a 19th Century bit of kit - it is a miniaturised version of the classic quarter-inch jack (6.35mm), which is said to go back as far as 1878.

Both sizes of plug have a nubbin of metal that nips in before flaring out just before the tip. "It needed to be something that could be inserted and removed very easily, but still make a secure connection," says Charlie Slee, a member of the Audio Engineering Society.

Initially the quarter-inch jack was used by operators in old-fashioned telephone switchboards, plugging and unplugging connections. "The standard has always been quarter-inch jacks," says Dr Simon Hall, head of music technology at Birmingham City University.

1st November 1919: Switchboard operators at the telephone switchboard oft the House of Commons, London.Image copyrightGetty Images

Image caption1919: Switchboard operators at the telephone switchboard of the House of Commons, London
"Professional headphones in studios, guitar leads - they all run off quarter-inch jacks."

Of course, as miniaturisation changed audio equipment, so the plug had to have a smaller alternative.

The 3.5mm version quickly became popular, spread by the use of personal headsets on transistor radios in the middle of the 20th Century.

The jack is known as a tip, ring, sleeve - or TRS - connection. The "tip" transfers audio into the left-hand earplug of a stereo headphone set, and the "ring" the right. The "sleeve" is the ground or "shield". This set-up is stereo - the original mono plugs had only tip and sleeve. Certain modern plugs have a second ring to allow control of a headset microphone or volume.

Annotated photograph showing sleeve, ring and tip of TRS jackImage copyrightiStock/BBC
"Technically speaking, it's not a bad design," Slee says of the utilitarian, adaptable design. "If the parts are made cheaply they can break and lose contact, but ultimately it does the job it was designed to do."

And yet, if the rumours - which Apple is not commenting on - are true, it bodes ill for the 3.5mm jack.

Apple has a track record of being early to abolish things which then start to disappear from rival products too. It killed the 3.5 inch floppy disk early. It also was among the first to remove optical drives.

But those signing the petition on the Sum of Us site and social media users have suggested that Apple's motive is greed.

Apple lightning cableImage copyrightAlamy
The potential grief in a switch to Apple's proprietary Lightning connector is obvious.

"It feels painful because you've got hundreds of millions of devices out there that are using the old standard," says Horace Dediu, a technology analyst with in-depth knowledge of Apple.

If you're using £1,000 headphones with your iPhone at the moment, you're going to be slightly cross.

And Charlie Slee thinks consumers are also concerned about ceding control to Apple. "People are mainly upset because they like to think they're in control of their technology," he says.

But this sense of the consumer in control is misplaced, Slee says. "Actually, the contrary is true: The big technology companies have always been in control of how you listen to music and watch videos."

The headphones in history



Thomas Alva Edison (1847 - 1931) American scientist, inventor and industrialist, after spending 5 continuous days and nights perfecting the phonograph, listening through a primitive headphone.Image copyrightGetty Images

Image captionScientist Thomas Edison (1847 - 1931) listens to his phonograph through a primitive headphone
The "primitive headphones" (as above) used for listening to early phonographs were simple acoustic tubes.

Headphones are really just ordinary telephone receivers adapted to fit a headset, says John Liffen, Curator of Communications at the Science Museum. The headset usually had just one receiver for a single ear.

The first headsets with a receiver for each ear were just called "telephones". The name was supplanted by "headphones" by the beginning of the 1920s when they were being widely used to listen to broadcasting via crystal sets.

For many years headphone receivers were the simple "Bell" type with permanent magnet, coil and diaphragm. Today's high-end 'phones are considerably more sophisticated, similar to miniature loudspeakers.

Source: John Liffen, The Science Museum




"I think it's a storm in a teacup," adds Simon Hall. His reasoning? Having a standardised headphone jack on mobile phones and MP3 players is only a relatively recent luxury.

"If you look at the previous generation of phones, things like Nokia phones, you had to have an adapter," he reasons. "If you want to connect headphones to professional equipment, you also need a professional adapter."

As recently as 2010, Samsung phones came equipped with a proprietary headphone port not dissimilar to Apple's rumoured replacement for the 3.5mm socket, the "Lightning" port.

This isn't the first time Apple has aroused ire. Way back in 2007, with the first iPhone, it received complaints that the headphone jack was sunk into the casing.

One technology wag called it "a great business plan - break an important device function, and sell the solution for fun and profit." The problem was fixed when Apple released its second iPhone model in 2008.

But Apple is known for evolving technology: "They got rid of DVDs, they got rid of the floppy disk drive; they got rid of parallel ports, they're eventually getting rid of USB. This is how they move," says Dediu, the Apple-watcher. He reckons the switch to Apple's proprietary connection augurs a planned move to headphones that are akin to the Apple Watch.

Mick Jagger of The Rolling Stones in a London recording studio in 1968Image copyrightGetty Images

Image captionMick Jagger of The Rolling Stones in a London recording studio in 1968
Owners of "old" headphones may find themselves having to buy adapters.

Dediu forecasts a rapid change. "What Apple does is catalyse transitions," he says. "It would have happened anyway, but if it wasn't for Apple it'd have taken 10-15 years, but now it'll happen in 5-7 years."

That the time may have come for the 3.5mm jack to be replaced shouldn't come as such a shock, believes Dediu. "Studying Moore's Law and the history of technology, it's clear we're not going to stick around with something analogue for long," he says. "It's almost puzzling that it's taken so long."

Thursday 18 February 2016

ETRI presents a blueprint of the 5G Future

We will see a huge change in the way we access the the internet in the future when 5G is here, at speeds that only big businesses and high level internet companies see at the moment, we will have this to hand on our smart phones and tablets. When 5G is hundreds of times faster than any of the UK's broadbands, households will be looking to the mobile phone companies to supply their home broadband.

A 5G future is no longer a distant one, but an upcoming reality. High quality videos of more than 10Mbps can be served simultaneously to 100 users even in a train running at up to 500km/h. People can experience data rates that are 100 times faster than currently available technologies.

The Electronics and Telecommunications Research Institute (ETRI) of Korea will hold a "5G technology demonstration" on the 18th December, 2015. It will demonstrate future SNS (social network service) and several 5G core technologies such as "millimeter wave", "Mobile Hot-spot Network", "in-band full duplex" and so on.

5G is the next generation wireless technology that would provide even faster data rates, even lower delays, and even more devices connected than 4G. Accordingly, distinct and differentiated applications are expected in 5G.



ETRI's "future SNS" is a kind of trial service model to apply 5G technologies that provides dynamic user-centric connection to neighboring people, things and spaces. It is characterized by instant content-sharing between users, communication with neighboring things, and Giga-bps(Gbps)-grade video applications in vehicles.

5G core technologies demonstrated by ETRI include the following:

-- MHN (Mobile Hot-spot Network) is a mobile backhaul technology that provides high-speed Internet access of Gbps in vehicles at speeds of up to 500 km/h (e.g. KTX in Korea). Almost 100 passengers can watch videos of high quality simultaneously.

-- ZING is a near-field communication technology that enables mass data to be transmitted with 3.5 Gbps data rate between neighboring devices within the radius of 10cm.

-- Single-RF-Chain compact MIMO technology enables a single antenna to simulate the effect of multiple antenna. It can reduce antenna volume and cancel inter-antenna interference in a multi-antenna system.

-- Millimeter wave (mmWave) beam switching technology provides fast switching of radio beams to mobile users, and therefore allows seamless Gbps-grade service in mobile environments.

-- Mobile Edge Platform (MEP) is a mobile edge cloud server on vehicles that enables passengers to enjoy customized Gbps-grade content and connects them with neighbors, things and spaces. It provides user-centric services.

-- In-band Full Duplex technology can transmit and receive signals simultaneously over the same frequency band. It can increase spectral efficiency by up to two times.

-- Small cell SW technology is designed for AP(Access Point)-sized small cell base stations that can reduce communication dead zones and improve data rates per user in a hot-spot area.

"With this demonstration event, we are officially introducing our R&D results on 5G. We will continue to lead the development of 5G technologies. Also, we are trying to develop commercialization technologies needed by businesses, and to construct a 5G ecosystem." said Dr. Hyun Kyu Chung, vice president of ETRI Communication & Internet Lab.

In January, 2016, ETRI will demonstrate Giga internet service and future SNS in a Seoul subway train installed with MHN and ZING kiosks. ETRI will also introduce hand-over technology on a millimeter wave mobile communication system and 5G radio access technology that satisfies 1 millisecond radio latency.

About ETRI

Established in 1976, ETRI is a non-profit Korean government-funded research organization that has been at the forefront of technological excellence for about 40 years. In the 1980s, ETRI developed TDX (Time Division Exchange) and 4M DRAM. In the 1990s, ETRI commercialized CDMA (Code Division Multiple Access) for the first time in the world. In the 2000s, ETRI developed Terrestrial DMB, WiBro, and LTE-A, which became the foundation of mobile communications.

Recently, as a global ICT leader, ETRI has been advancing communication and convergence by developing Ship Area Network technology, Genie Talk (world class portable automatic interpretation; Korean-English/Japanese/Chinese), and automated valet parking technology. As of 2015, ETRI has about 2,000 employees where about 1,800 of them are researchers.

Sunday 7 February 2016

How to Hide a Radio Earpiece

A 2 way radio earpiece is an accessory which can receive and transmit unlike the broadcast receivers which only receive content. 2 way radio earpieces allow the user to engage in conversations with other such radio earpieces that are operating on a similar radio frequency. 2 way radios are readily available in hand held, mobile and stationary base configurations. The hand held radios are usually known as walkie talkies or handie-talkies.

2 way radio systems normally operate in 1/2 duplex mode; this basically means that the user can listen or talk, but cannot do both at a go. A PTT (also known as press to transmit) button usually activates the radio's transmitter. When the button is released, its' receiver becomes active. For 2 way radio earpieces, a push to talk button is included on a wire that runs up the arm of the user, with an acoustic tube up to the ear.

There are 2 wires which run independently from the 2 way radio; one ends at the PTT and mic, while the other ends at the radio's earpiece. The 2 wire kits are worn under the clothing, running one cable from the 2 way radio, up to your ear. The other cable runs from the 2 way radio, up your back and down your sleeve to the cuffs of your long sleeved shirt or clipped by a lapel on the front of your shirt. 3 wire kits separate the Mic and PTT with one cable running down the arm, connected to the PTT, another connected to the mic, with normally includes a microphone which is clipped to the jacket or shirt and the third has the acoustic tube to go into the ear.

How to Hide a Radio Earpiece



You can run the wires underneath the shirt; hiding the wires from the 2 way radio to the earpiece underneath your clothing, offering more discreetness. If you aren't too concerned with discreetness, you can leave the wires outside of your clothing. The radio will work either way. Here are the steps on how to hide a radio earpiece;

Take the wires of the radio earpiece and run them inside your shirt. Now take the wires out from your shirt's top; this way the wires will be well hidden. Take your earpiece and then put it in one ear. Ensure, the earpiece fits tightly and wont fall when walking, you can put the earpiece in either ear.

Once you're comfortable with your earpiece, it is now time to fit the wires that go into the radio. Take the wire that connects the earpiece and the radio, and fit it inside the shirt. Take this wire out from your shirt's bottom. Put it in your radio, and then clip the radio properly on your belt. Once all the wires are properly fitted inside your shirt, you can now tuck in the shirt to hide them completely.

Once everything is properly fitted, switch on your 2 way radio and test it. Now, you can use your 2 way radio earpiece covertly

The real benefit of using a hidden radio earpiece, is that other people will not notice when you're talking on your earpiece, remember to never share radio earpieces; this is for health and sanitary purposes. You can also buy radio earpieces, along with your own personal ear tips and clear coils.