Write short note on quantization, Computer Engineering

Assignment Help:

Write short note on Quantization.

Quantization: This is the first step in PCM. The whole amplitude range of the modulating signal is divided in a number of standard levels termed as quantization levels at equal intervals as demonstrated in figure. These levels are, after that transmitted, in binary code. Therefore, the actual number of these standard levels is a power of two as 4, 8,16,32,64,128 and so on. For the sake of simplicity, figure demonstrates only eight levels, however practical systems use 128 levels or even higher. A new signal is generated through producing, for every sample, a voltage level equivalent to the mid-point level of the standard level wherein the sample falls. Therefore if a range of 0-4 V were divided in four 1V standard levels and the signal was sampled while this was 2.8V, the quantizer will output a voltage of 2.5 V, and hold which level till the next sampling time 2.5 V corresponds to the midpoint of the third standard level. The result in a stepped wave forms that follow, the contour of the modulating signal. This discritisation of the modulating signal is termed as Quantization. Given figure demonstrates the modulating signal m(t) and quantized signal (mq(t)) when eight standard levels are utilized. The quantized wave forms are an approximation to the original signal. The difference in between the two wave forms amounts to noise added to the signal through the quantization process. Therefore the error introduced is termed as quantizaton error.

1808_Modulating Signal and Quantized Signal.png

FIG - Modulating Signal and Quantized Signal


Related Discussions:- Write short note on quantization

How many ram chips are required for memory of 2048 bytes, How many 128 × 8 ...

How many 128 × 8 RAM chips are required to provide a memory capacity of 2048 bytes. Ans. Available here RAM chips = 128 x 8 Required the memory capacity    = 2048 x 8 No. of chip

Can gimp install its own colormap, Yes. In either the system-wide gimprc...

Yes. In either the system-wide gimprc file or your personal gimprc file, uncomment the line that have install-colormap.

What is a user diagram protocol, UDP (User Diagram Protocol) is? It is ...

UDP (User Diagram Protocol) is? It is both Connectionless and Message Oriented.

Write a verilog code for synchronous and asynchronous reset, Write a Verilo...

Write a Verilog code for synchronous and asynchronous reset? Synchronous  reset, synchronous means clock dependent so reset must not be present in sensitivity disk eg: alway

Explain parsing, What is parsing? The target of parsing is to find out...

What is parsing? The target of parsing is to find out the syntactic validity of a source string. A tree is built for use through subsequent phase of compiler, if the string is

The variables that are declared outside all functions, The variable that ar...

The variable that are declared outside all the functions are called The variables that are declared outside every functions are known as global variable.

What happens if acknowledge() is called within a transaction, As per the JM...

As per the JMS specification, when you are in a transaction, the acknowledge Mode is ignored. If acknowledge() is known as within a transaction, it is ignored.

Packet switching is used for which service, Packet switching is used for ...

Packet switching is used for (A)  Credit card verification (B)  Automated Teller Machine (C)  The internet and the World Wide Web (D)  All of the above  Ans

Explain level of a node, Level of a node The root is at level zero and ...

Level of a node The root is at level zero and the level of the node is 1 more than the level of its parent

Draw the logic circuit using NOR gates using K-map, Draw the logic circuit ...

Draw the logic circuit using minimizaed equation by K-map for the simplified function using NOR gates only. F (A, B, C, D) = Π M (1, 2, 3, 8, 9, 10, 11,14) ⋅ d (7, 15) Ans

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