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Posts: 256 | Thanked: 98 times | Joined on Jan 2010
#771
Originally Posted by nax3000 View Post
I don't really get what the DSP speed actually does.. Could someone kindly explain it to me please?
worth reading

http://www.schleef.org/blog/2009/11/...dsp-and-omap3/

http://www.wave-report.com/tutorials/DSP.htm

http://en.wikipedia.org/wiki/Digital_signal_processor


''DSPs are not the same as typical microprocessors though. Microprocessors are typically general purpose devices that run large blocks of software. They are not often called upon for real-time computation and they work at a slower pace, choosing a course of action, then waiting to finish the present job before responding to the next user command. A DSP, on the other hand, is often used as a type of embedded controller or processor that is built into another piece of equipment and is dedicated to a single group of tasks. In this environment, the DSP assists the general purpose host microprocessor.''

''DSP chips are used in sound cards, fax machines, modems, cellular phones, high-capacity hard disks and digital TVs. According to Texas Instruments, DSPs are used as the engine in 70% of the world's digital cellular phones, and with the increase in wireless applications, this number will only increase.Digital signal processing is used in many fields including biomedicine, sonar, radar, seismology, speech and music processing, imaging and communications. ''

basically sounds like the dsp is a sidekick for the main processor for secondary tasks that the main cpu tells it to do in the case of the n900 from the 1st link it sounds like the dsp is being told to help with video encoding / video playback etc which is probably why with the dsp overclocked people are seeing better iplayer results

Last edited by buxz777; 2010-04-04 at 23:07.
 

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