 |
|
The digital signal processing (DSP) technology has developed
rapidly recently, which is used extensively in fields of communication,
control and signal analysis. However, as a proprietary processor it usually
can neither perform operations that some general purpose microprocessors
are able to perform nor support different protocols such as TCP/IP efficiently.
Even if the 32-bit microprocessor running a Linux operating system is able
to give different protocols a more sufficient support, it is not competent
to the task of processing larger amount of arithmetic (such as the compression
and decompression of picture and voice signal, encryption and decryption
accounting in data communication and so forth.). Nevertheless, WHN has combined
the 32-bit microprocessor running an embedded Linux operating system with
a digital signal processor to form a digital signal processor with powerful
networking performances. As a coprocessor, the digital signal processor
is capable of performing a complicated arithmetic requiring enormous accounting
and some real time tasks. It is able to perform a data exchange with the
32-bit microprocessor running an embedded Linux operating system by means
of a shared memory. Such a system has integrated the advantages of two microprocessor
systems and an embedded Linux operating system and become more capable of
powerful networking and processing capacities and is widely used in fields
of IP voice, network video, signal and spectrum analysis, data communication
and so forth. |
|
