Feeds

MIT boffins devise faster Fast Fourier transform

New technique dramatically speeds processing

Beginner's guide to SSL certificates

Researchers at MIT have published a paper detailing a new approach to Fast Fourier tranforms (FFT) that could increase the speeds of image and sound processing tenfold.

FFT has been in use since the 1960s to process audio and image files by isolating key frequencies from an irregular original signal and then assembling them in a useable format. MIT's new technique takes the signal and splits it into smaller segments and isolates key frequencies, assigning them a “weight” to ensure they get priority, while abandoning those frequencies that aren’t needed.

Improved fast Fourier transform from MIT

Many frequencies Fouriered into one

The team presented the paper at this week’s Association for Computing Machinery’s Symposium on Discrete Algorithms (SODA), and gave the example of transmitting an image of an eight-by-eight block of pixels. This breaks down into 64 data samples, each with its own digital frequency, but the team found that 57 of those can be discarded without noticeably degrading the quality of the final image.

The system also uses overlapping filters to isolate key frequencies, and then uses technology from 4G networks to slice the spectrum into ever-decreasing slices until the most heavily weighted signals are isolated and processed.

This latest improvement on FFT should not only help speed up image and sound processing, but also reduce the power and bandwidth required for devices using the results. The team claims up to a 10x performance boost in some applications, but it has yet to be seen if there’s much interest from manufacturers in the new technique. ®

Internet Security Threat Report 2014

More from The Register

next story
GRAV WAVE DRAMA: 'Big Bang echo' may have been grit on the scanner – boffins
Exit Planet Dust on faster-than-light expansion of universe
SpaceX Dragon cargo truck flies 3D printer to ISS: Clawdown in 3, 2...
Craft berths at space station with supplies, experiments, toys
That glass of water you just drank? It was OLDER than the SUN
One MEELLION years older. Some of it anyway
Big dinosaur wowed females with its ENORMOUS HOOTER
That's right, Doris, I've got biggest snout in the prehistoric world
Japanese volcano eruption reportedly leaves 31 people presumed dead
Hopes fade of finding survivors on Mount Ontake
Relive the death of Earth over and over again in Extinction Game
Apocalypse now, and tomorrow, and the next day, and the day after that ...
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
Intelligent flash storage arrays
Tegile Intelligent Storage Arrays with IntelliFlash helps IT boost storage utilization and effciency while delivering unmatched storage savings and performance.
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Secure remote control for conventional and virtual desktops
Balancing user privacy and privileged access, in accordance with compliance frameworks and legislation. Evaluating any potential remote control choice.