Digital signal processing (DSP) has many applications in various industries. Unlike analog signal processing, DSP, widely used in dealing with voice or video signal has many advantages. The following is the working principle of DSP and the benefits it provides.

What is a digital signal processing (DSP)?
Digital signal processing (DSP) is for the real world of digital analog signal processing. Analog input can be voice, video, location, etc.

Analog signal processing
Pressure, images, video and audio is in a wide range of real world scientific and engineering application examples of the analog signal processing. Through the analog signal processing, the input is the original processing - without them before processing digital, before the output to convert them back into the simulation.

The disadvantage of analog to digital processing
The disadvantage of analog signal processing, including:

The system is easily affected by electrical component values change
Analog circuit is not flexible
The system is not suitable for programming applications
It does not apply to mathematics multiplication and division, etc
DSP processing how to solve these weaknesses
Digital signal processing system can solve most simulation process related challenges. The main advantage of the DSP is:

The digital circuit affected by element change smaller
Digital circuit is more flexible, which means that the need to modify the hardware can adapt to some changes
Digital circuit is programmable, very suitable for mathematical and logical operations
A typical DSP circuit has the following key components:

The signal processing module
Module (A/D) converter
Digital-to-analog (D/A) converter
Analog signal conversion
The ADC is used for each real-world analog input to generate a binary code. It through quantitative and compare the size of each input sample and its discrete level (for example, four converter 16 discrete level) to make this happen. It to a predetermined regular sampling interval processing analog input signal.

D/a conversion
D/A will be processed signal can be converted into analog signals. In audio DSP application, you can combine the speed or pitch adjustment function to optimize the output. Then can play perfect sound on the speaker.

DSP module
After the analog signal is converted, it happened in the processing of the digital signal processor block. DSP is a kind of programmable calculation engine, instructions and data access algorithm to perform the function of logic and mathematics. In a typical fourth-order finite impulse response (FIR) filter, the circuit include five Numbers multiplication component, delayed four adder and a few components.

Digital signal processing technology
In today's digital world, DSP circuit has many useful applications, including:

Radar positioning
Audio and video compression
Speech analysis/recognition
Digital image processing