Feeds

MIT boffins devise faster Fast Fourier transform

New technique dramatically speeds processing

Boost IT visibility and business value

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. ®

Gartner critical capabilities for enterprise endpoint backup

More from The Register

next story
LOHAN packs bags for SPACEPORT AMERICA!
Spanish launch goes titsup, we're off to the US of A
Gigantic toothless 'DRAGONS' dominated Earth's early skies
Gummy pterosaurs outlived toothy competitors
'Leccy racer whacks petrols in Oz race
ELMOFO rakes in two wins in sanctioned race
TRANSMUTATION claims US LENR company
Ten points of stuff out of a five pound bag
Boffins ID freakish spine-smothered prehistoric critter: The CLAW gave it away
Bizarre-looking creature actually related to velvet worms
CRR-CRRRK, beep, beep: Mars space truck backs out of slippery sand trap
Curiosity finds new drilling target after course correction
BAT-GOBBLING urban SPIDER QUEENS swell to ENORMOUS SIZE
But they'd lose a deathmatch against the coming Humvee-sized, armoured Arctic ones
Astronomers scramble for obs on new comet
Amateur gets fifth confirmed discovery
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
7 Elements of Radically Simple OS Migration
Avoid the typical headaches of OS migration during your next project by learning about 7 elements of radically simple OS migration.
BYOD's dark side: Data protection
An endpoint data protection solution that adds value to the user and the organization so it can protect itself from data loss as well as leverage corporate data.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?