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DSP audio tunnelling extends Android device battery life

Posted: 19 Feb 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Android? DSP? audio tunnelling?

Google has introduced audio tunnelling to a digital signal processor (DSP) support in Android 4.4 KitKat, offloading the audio decoding and output effects to the onboard DSP.

This approach unburdens the application processor when streaming music, reportedly improving the battery life of smartphones.

Supported by dedicated hardware in the Nexus 5 phones in the DSP block, this new solution is said to cut audio processing power by up to 14X, which could result in double the smartphone playback time.

The Cadence Tensilica HiFi audio tunnelling solution for Android has been launched as the industry's first Android-compatible technology for a licensed digital signal processor, taking full advantage of these new enhancements.

KitKat audio tunnelling was developed based on input from the Low Power Android Consortium (LPAC), which was initially spearheaded by Tensilica, now a part of the Cadence IP Group.

"Until now, Android devices have had to run audio on the host processor or on an OEM proprietary offload framework that still required the encoded and decoded audio streams to be managed by the host CPU," said Larry Przywara, Cadence's director of audio/voice IP marketing in a statement. "Cadence, in cooperation with other companies, worked with Google to develop audio tunnelling to the DSP in Android to solve this problem", he added.

- Julien Happich
??EE Times Europe

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