568 EMBEDDED SYSTEMS
15.1 | The Application Scenario
Many applications require a mixture of control-oriented DSP software. Many
applications that are used in the embedded fi eld need to use DSP computations. For
example, think of a mobile phone, it deals with compressed form of audio (MP3)
video and still images and thus DSP computations in ‘real time’ are mandatory. Many
advanced mobile phones use an ARM processor, which has an instruction set with a
small set of DSP instructions. But that processor may not be able to perform DSP
computations in real time, and therefore a DSP core is also needed. Such a system
is likely to use a powerful MCU for general purpose computations and an additional
DSP processor. ese two cores may be present ...