Question

Q No 1: Explain two applications of digital signal processing in detail.
Q No 2: What is meant by digital signal processor? Explain architecture of any of the
digital signal processor.

Answer 1

1) Digital Signal Processing has many real-world applications. Two of its applications are:

Hearing Aid in Biomedical Engineering: They amplify the sound and aid the ear to listen properly. DSP is used for noise reduction to reduce background noise and also comes cheaper.

With the help of digital hearing aids, the microphone records sound which gets converted into digital signals. These signals are processed using the chip in hearing aid. The data is then processed and analyzed using Digital Signal Processing

MRI- Scan(Magnetic resonance imaging): Digital Signal processing enables the system to real-time use, process and display cardiac movies at different video rates.

This system enables real time accusation display, processing of cardiac moves at different video frame rates for eg 20 images/sec. images can be compressed but should be displayed without compression during the scan. MRI implementation using Digital Signal Processing helps in fast data transfers, ability to go multi channels scans.

2)

Digital signal processor: A digital signal processor is a specialized hardware microprocessor chip, which has its architecture optimized for the needs of Digital Signal Processing(DSPs). DSP takes the real-world signals like audio, voice, video, temperature etc and manipulates them as per need.

The architecture of a general DSP :

It consists of the following blocks:

-> CPU

->ALU(arithmetic and logic unit)

->Accumulators

->Barrel Shifter

->Multiplier Unit

->Compare Select and Store unit(CSSU)

->Memory cache

->DMA controller