News tagged with digital signals
3-D, after-the-fact focus image sensors invented
(PhysOrg.com) -- At the heart of digital photography is a chip called an image sensor that captures a map of the intensity of the light as it comes through the lens and converts it to an electronic signal.
Apr 03, 2012 |
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New 167-processor chip is super-fast, ultra energy-efficient
A new, extremely energy-efficient processor chip that provides breakthrough speeds for a variety of computing tasks has been designed by a group at the University of California, Davis. The chip, dubbed AsAP, is ultra-small, ...
Apr 22, 2009 |
4.7 / 5 (21) |
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High-speed CMOS sensors provide better images
Conventional CMOS image sensors are not suitable for low-light applications such as fluorescence, since large pixels arranged in a matrix do not support high readout speeds. A new optoelectronic component ...
Jan 03, 2012 |
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FCC to open up vacant TV airwaves for broadband
(AP) -- A new flavor of Wi-Fi, with longer range and wall-piercing power, could show up in wireless gadgets a year from now if the Federal Communications Commission works out the last details of new spectrum ...
Sep 13, 2010 |
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Explained: The Discrete Fourier Transform
(PhysOrg.com) -- In 1811, Joseph Fourier, the 43-year-old prefect of the French district of Isčre, entered a competition in heat research sponsored by the French Academy of Sciences. The paper he submitted ...
Nov 25, 2009 |
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Don't change that channel: DTV woes still abound
(AP) -- Think the digital TV transition is over? Not quite. Many viewers have found that they can't pick up certain stations after the switch, even with the right TVs or converter boxes. The stations are still trying to ...
Sep 18, 2009 |
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Record-speed wireless data bridge demonstrated: Takes high-speed communications the 'last mile'
A team of researchers in Germany has created a new way to overcome many of the issues associated with bringing high-speed digital communications across challenging terrain and into remote areas, commonly referred to as the ...
Feb 27, 2012 |
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Mobile digital TV poised for big moves in 2011
Rabbit ears on a mobile phone? Well, not exactly, but broadcasters and gadget manufacturers are working to beam live television to portable devices.
Dec 22, 2010 |
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700,000 callers phone digital TV hot line
(AP) -- Nearly 700,000 calls were received by a federal hot line this week from people confused about the nationwide switch from analog to digital TV broadcasts that occurred Friday.
Jun 13, 2009 |
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Friday is final curtain for analog TV signals
(AP) -- The last major TV stations that are still broadcasting in analog will turn those signals off Friday and go all digital. And this time, they really mean it.
Jun 10, 2009 |
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Hubble to receive high-tech James Webb Space Telescope technology
Scientists and engineers now creating new technologies for NASA's James Webb Space Telescope, have realized they can be used to enhance the Hubble's Advanced Camera for Surveys (ACS) in the upcoming servicing ...
Space & Earth / Space Exploration
May 08, 2009 |
4.8 / 5 (11) |
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Toward cheap underwater sensor nets
UC San Diego computer scientists are one step closer to building low cost networks of underwater sensors for real time underwater environmental monitoring. At the IEEE Reconfigurable Architectures Workshop ...
May 27, 2009 |
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Stations must warn if new TV signals lack reach
(AP) -- TV stations must alert viewers if their new digital signals don't reach areas covered by their soon-to-be-defunct analog broadcasts, the Federal Communications Commission has ruled.
Mar 16, 2009 |
2 / 5 (1) |
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TV channel squeeze proposed to pay for tax cuts
(AP) -- Call it the Great Channel Squeeze.
Dec 16, 2011 |
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Japan goes digital after turning off analogue TV
Japan on Sunday shifted to digital terrestrial broadcasting, switching off its analogue television network in all areas except those worst hit by the March 11 earthquake and tsunami, the government said.
Jul 25, 2011 |
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Digital signal
The term digital signal is used to refer to more than one concept. It can refer to discrete-time signals that have a discrete number of levels, for example a sampled and quantified analog signal, or to the continuous-time waveform signals in a digital system, representing a bit-stream. In the first case, a signal that is generated by means of a digital modulation method is considered as converted to an analog signal, while it is considered as a digital signal in the second case.
For more information about Digital signal, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
