Qualcomm share details about the new SoC-assembly Snapdragon 820. For example, two weeks ago, Qualcomm has shared details about the new graphics system Adreno 5xx and wonderful graphic 14-bit signal processor Spectra ISP. The latter turned out to reveal its full potential only in a pair with a new computing DSP as part of SoC Snapdragon 820 - with a signal digital processor 680 Hexagon.
Digital signal processor 680 Hexagon relieve the computational core Kryo in problems processing visual range, the audio signal processing and sensors. In Apple platform is also provided a signal processor (coprocessor) to work with the sensors.
The second major task for the new signal processor will process the audio and video (with a picture of the work). For this purpose DSP Hexagon 680 is equipped with a unit vector extensions (HVX). Paired with Spectra ISP work Hexagon vector unit 680 is able to give the effect of a mobile platform computer vision, augmented reality to provide a smooth, immersive virtual reality and more. The company, for example, talk about getting good quality images in low light. However, the main computing cores are idle, which saves up to 90% of the energy usually spent on these tasks.
Above you can see an example of when the DSP Hexagon 680 with enabled vector unit is up to three times faster than the four core Qualcomm Krait optimized for SIMD-Accelerator NEON. The energy consumption at the same time 18 time below.
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