Lyric Semiconductor, Inc. a DARPA- and venture-funded MIT spin-out, last week emerged from stealth mode to launch a new technology called probability processing, which is poised to deliver a fundamental change in processing performance and power consumption. With over a decade of development at MIT and at Lyric Semiconductor, Lyric’s probability processing technology calculates in a completely new way, enabling orders-of-magnitude improvement in processor efficiency. Lyric Error Correction (LEC™) for flash memory, the first commercial application of probability processing, offers a 30x reduction in die size and a 12x improvement in power consumption all at higher throughput compared to today’s digital solutions. Lyric Semiconductor has developed an alternative to digital computing. The company is redesigning processing circuits from the ground up to natively process probabilities – from the gate circuits to the processor architecture to the programming language. As a result, many applications that today require a thousand conventional processors will soon run in just one Lyric processor, providing 1,000x efficiencies in cost, power, and size.
For over 60 years, computers have been based on digital computing principles. Data is represented as bits (1s and 0s). Boolean logic gates perform operations on these bits. Lyric has invented a new kind of logic gate circuit that uses transistors as dimmer switches instead of as on/off switches. These circuits can accept inputs and calculate outputs that are between 0 and 1, directly representing probabilities -- levels of certainty.
A digital processor steps through these operations serially in order to perform a function. In order to improve efficiency even further, Lyric’s processors are designed to perform many probability computations in parallel.
Lyric’s approach can accelerate search, fraud detection, spam filtering, financial modeling, genome sequence analysis, and many other important present and future applications that involve simultaneously considering many possible alternatives and deciding on the best fit – the best guess for the answer. In theory, digital processors can perform these calculations, but in practice, they do so very inefficiently. As a result, a huge amount of processing overhead is required, costing an enormous amount of space, power and money.
Flash error rates have become increasingly problematic with each new generation of the technology. Today, one in every thousand bits stored in a flash memory comes out wrong when the memory is read. In the next generation, the number of errors will approach one bit wrong in every hundred. Flash companies spend billions of dollars on new foundry processes in order to increase overall flash density, but then suffer from increasing error rates. As a result, “advanced” error correctors have had to become significantly larger, more complex and more expensive. LEC is Lyric’s first commercial probability processing offering– an advanced error corrector for flash memories that is 30x smaller and has 12x lower power consumption, all at a higher bandwidth than the digital implementations currently available.
Lyric’s LEC technology is currently available for license, accompanied by support services enabling product integration within 12 months. Beyond LEC, the first GP5 will begin sampling in 2013.
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