Signal Processors

Signal Processors:

Signal Processors are either general purpose programmable microprocessors or integrated circuits of microprocessors. Basically this processor is an electronic circuit which has the capability of deleting the information from an analog signal which acts as quantifiable units for future purposes.

Signal Processors provide plenty of useful features which normally requires multiple modules. Audio and control signals can be amplified, attenuated, offset and inverted all in this one, easy to use module. The most striking feature of this processor is that the two sections allow two processes to be performed at the same time.

The processing includes:

• Amplification
• Attenuation
• Inversion
• Voltage Source
• Offset Adjustment

Single Processor has the tendancy of changing the sound of the instrument or some other sound source with equalizers, limiters, compressors and other devices thereby processing them to be recorded onto a master.

Coming to the characteristics of signal processor, they have special instructions for SIMD, taking digital data from ADC and passes out data which is finally output by converting into analog by DAC, separate program and data memories, only parallel processing can be done with no mutitasking and finally the ability to act as a direct memory access device if it is placed in a host environment.

With the tremendous increase in the use of computers the need of digital signal processing has also increased. In order to use an analog signal on a computer it must be digitized with an analog to digital converter. Sampling is usually carried out in two stages namely :

• Discretization
• Quantization.

In the discretization stage, the space of signals is partitioned into equivalence classes and discretization is carried out by replacing the signal with representative signal of the corresponding equivalence class. In the quantization stage the representative signal values are approximated by values from a finite set.

The advanced technology named Advanced Signal Processor integrates commercial-off-the shelf technology at a fraction of the cost of building new processors. No structural footprint is required and the bulk store controller subunit replacement contains a bulk memory expansion and parallel processor . The above enhancements allow for the use of commercial software.