Explain source encoding or data compression, Electrical Engineering

Assignment Help:

Q. Explain Source encoding or data compression?

The sequence of binary digits from the source encoder, known as the information sequence, is passed on to the channel encoder. The purpose of the channel encoder is to introduce some redundancy in a controlled manner in the binary information sequence, so that the redundancy can be used at the receiver to overcome the effects of noise and interference encountered in the transmission of the signal through the channel. Thus, redundancy in the information sequence helps the receiver in decoding the desired information sequence, thereby increasing the reliability of the received data and improving the fidelity of the received signal.

The binary sequence at the output of the channel encoder is passed on to the digitalmodulator, which functions as the interface to the communication channel. The primary purpose of the digital modulator is to map the binary information sequence into signal waveforms, since nearly all the communication channels used in practice are capable of transmitting electric signals (waveforms). Because themessage has only two amplitudes in a binary system, themodulation process is known as keying. In amplitude-shift keying (ASK), a carrier's amplitude is shifted or keyed between two levels. Phase-shift keying (PSK) involves keying between two phase angles of the carrier,whereas frequency-shift keying (FSK) consists of shifting a carrier's frequency between two values.Many other forms of modulation are also possible.


Related Discussions:- Explain source encoding or data compression

TRANSFORMER, what are the characteristics of transformer?

what are the characteristics of transformer?

Combination of uni-selectors and two motion selectors, Q Using a combinatio...

Q Using a combination of Uni-selectors and two motion selectors, draw a diagram of thousand line exchange and illustrate its working. Ans: The diagram for such an exchange i

Electrical engineering, 4. Modify the circuit designed for question 3 to pr...

4. Modify the circuit designed for question 3 to provide an emergency stop which will park both cylinders in the extended position (i.e. A + B +). 5. Modify the circuit designed fo

Aerodynamic principles & aircraft design, Define the aircraft axes & degree...

Define the aircraft axes & degrees of freedom. Analyse the different maneuvers that can be done by an aircraft.

Npn bjt with forward-biased, NPN BJT with forward-biased: An NPN trans...

NPN BJT with forward-biased: An NPN transistor can be referred as two diodes along with a shared anode. In common operation, the base-emitter junction is forward biased and th

Valence band- conduction band- valence electrons energy gap, Explain the te...

Explain the terms: valence band, conduction band, valence electrons, and energy gap with the help of suitable diagrams. Valence Electrons: The electrons in the outermost orbi

Embedded system, comment instruction for LIST p=18f4550

comment instruction for LIST p=18f4550

Telecommunication, Design a low noise amplifier using an Infineon RF transi...

Design a low noise amplifier using an Infineon RF transistor BFP640. The amplifier is to be used to amplify the L2 GPS signal and so the centre frequency is 1227MHz and bandwidth 4

How phase angle measurement are carried out, Q.   Explain how phase angle m...

Q.   Explain how phase angle measurement are carried out with vector impedance meter.     Sol. Impedance measurements are concerned with both the magnitude (Z) and the phase

Describe about reduction clause, Q. Describe about Reduction Clause? Re...

Q. Describe about Reduction Clause? Reduction clause specifies an operator as well as one or more list items. For every list item a private copy is created on every thread and

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd