Getting More Data from Less Signal
A rule of thumb for some data compression techniques is that you can never add information back to a file. That is to say that the information lost due to lossy compression cannot be retrieved, but then, that is just a rule and some rules are meant to be broken. Over the past ten years researchers have been developing compressed sensing technology which can get more data from a signal than it actually contains, and now researchers at MIT have found a way to potentially make it commercially viable.
Compressed sensing works by actually adding information to a signal, which distorts it, but the distortions can be analyzed to uncover more information than the sensor could originally pick up. In 2006 Rice University researchers applied this by using randomly tilted micromirrors to shine light onto a single-pixel sensor. By processing the signal recorded by the one pixel though, the researchers were able to accurately reproduce an image with thousands of pixels. As impressive as that already is, the main benefit to compressed sensing is that it may allow a sensor to use considerably less power.
What MIT has done is developed a new framework for evaluating compressed-sensing methods and how they will operate on real-world hardware. Compressed sensing theory often considers the circuitry involved as being ideal, which is not true to reality. This framework should allow theorists to develop better theories and allow those who will build the necessary circuits to consider their performance before starting the expensive fabrication process.
Source: MIT
Read More ...
AMD to Clarify GPU Plans Later This Week AMD has thrown itself into reverse, as over the weekend some noise was made that the company wouldn't release its Radeon HD 8000 series cards until the end of this year or beginning of next. Now, however, AMD has issued a statement it'll "certainly" have new GPUs this year with more information arriving later this week. That is certainly good news for everyone wanting to see what the HD 8000 series brings, especially if they've been holding out as long as possible for their next upgrade. The reason AMD is wanting to clarify things later this week is because the report over the weekend was taken out of context, not to mention translation. If you're so inclined you can check out the report here, though hopefully your Japanese is clearer than the Google Translate version. When AMD reveals information on the HD 8000 series later this week, even if it's just an expected launch date, you can be sure to check it out here. Source: PC World Read More ...
Coupling Electricity and Magnetism for New Computer Memories One of the more important scientific discoveries of the 19th century was the link between electricity and magnetism. Without this understanding electric motors and generators could not be explained and neither could light, an electromagnetic phenomenon. Now researchers at Argonne National Laboratory are examining materials that strongly couple electricity and magnetism for their possible use for computer memories. While electricity and magnetism are linked, the electric properties of a material do not necessarily affect the material's magnetic properties, but that is not the case for 'magnetoelectrics.' The materials within this special class actually have their electric and magnetic properties coupled such that changing one property changes the other. The researchers took one of these materials, europium-titanium oxide (EuTiO3) and compressed its atomic structure. When the researchers applied a voltage to the material, the titanium atom shifted which electrically polarized the material and changed its magnetic order. While there is still a great deal of work to be done first, magnetoelectric research could lead to advanced kinds of computer memory which combine the best of both electric and magnetic memories. Also we could see the materials being used to create non-binary memories that reach beyond the 0s and 1s of modern electronics. Source: Argonne National Laboratory Read More ...
Available Tags:AMD , GPU ,
No comments:
Post a Comment