DSP is used to brighten areas of both video and photos
Qualcomm says it is more power efficient to run some operations in a mobile phone using a dedicated digital signal processor (DSP) rather than the CPU.
As a result it has added a larger DSP element to its Snapdragon 820 mobile processor.
DSP elements and CPUs with DSP extensions are traditionally used to provide more power efficient processing is specific applications such as video, imaging and audio.
But to date the use of DSP in mobile phones has been limited to specific functions such as the data modem. Texas Instruments integrated DSP elements into some of its OMAP mobile processors.
Qualcomm has now added a self-contained DSP element called Hexagon 680 for sensor processing in the phone.
The CPU also has access to DSP extensions for processing intensive operations such as imaging, with the firm’s new Spectra camera image signal processor in low-light environments.
The Snapdragon 820 will use DSP to adaptively brighten areas of both video and photos that would otherwise appear too dark.
Also according to Qualcomm, using the DSP element can double MP3 playback battery life.
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