Skip to main content

Pulse Code Modulation - Encoding, Quantization And Sampling


The importance of Encoding, Quantization, and Sampling in Pulse Code Modulation

There are mainly 3 basic operations that are carried out in pulse code modulation. They are encoding, sampling and quantization. Before knowing about the importance of encoding, quantization and sampling process in pulse code modulation, let us know a short description of pulse code modulation. It is a process in which a series of analog signals are converted into digital binary signals. This process is very useful in communication systems.

A whole pulse code modulation technique consists of encoding, quantization and sampling process. Therefore, these three operations (encoding, quantization, and sampling) play an important role in pulse code modulation.

3 Operations carried out in Pulse Code Modulation

The first step in pulse code modulation is sampling. It is very important in pulse code modulation as large varieties of analog signals are transmitted in a digital communication system in the form of block code words. Only the analog samples which are in the form of codewords are transmitted via a communication channel.

If the analog signals are not converted to block codes then it can't be transmitted in the channel. Sampling is essential for transmitting such analog signals.

The second main operation is termed as quantization process. Also, there are two important techniques in the quantization process. They are known as uniform quantization and non-uniform quantization. In the quantization process, the above discrete signals are denoted by a certain finite set of values. These set of values are also called finite amplitude levels. The uniform quantization and non-uniform quantization process are different.

In uniform quantization process, the series of sampled signals are quantized uniformly with equal intervals of time. Similarly, in the non-uniform quantization process, the series of sampled signals are not quantized uniformly with equal intervals.

There is an important role of Companding technique in the non-uniform quantization process.

Companding technique in Quantization process:
Companding is a special technique in non-uniform quantization process where compression of base-band signals and expansion of decoded message signals are carried out.

This companding technique is very useful in non-uniform quantization process for compressing purposes.

And, the last operation that is carried out in the pulse code modulation process is the encoding technique. There is an important role of encoding technique in pulse code modulation as it converts a sequence of input signals into the binary sequence so as to make easier to transmit in the digital communication channel.

Popular posts from this blog

Importance of Modulation in Communication System

There is a huge importance of modulation in the communication system. It is defined as the modification process of the message signals in the communication system. In the modulation process, the message signal of very low frequencies is impressed. And, only the carrier signal of high frequency is passed through the transmission process.

It is one of the important techniques in which the addition of signal is done to an optical signal carrier or electronic wave carrier. It is very important as it uses the properties of a periodic waveform the most. It is used in communication just to pass the signal which bears information from one source to another destination.

Here, a transmitter is used which is normally present to modify the message signal. In this process, the message signal is modified in a suitable form and it is transmitted over various communication channels. This whole process of modification of message and carrier signals is termed as modulation.
The need for Modulation Pro…

Importance of External Environmental Analysis in Strategic Management

External Environmental Analysis (EEA) is the analysis of the external environment which helps in analyzing the trends and activities of the industry in the marketplace. The processes of EEA are:
1. Scanning
2. Monitoring
3. Forecasting
4. Accessing
Micro and Macro factors in the Business Micro factors look at the specificity and macro factors look at the overall economy/business. Micro factors can be influenced because it is an assessment of the specific firm, and Macro factors are less influenced because it is external factors which are difficult to predict and understand. Therefore, micro factors are the factors of the specific firm such as the functional department, policies, procedures, laws, etc which can be influenced and changed when necessary. But, macro factors are external factors/segments such as demographics, political, legal, socio-cultural, technology, environment, legal issues that can be difficult to predict and influence.
The typical External Environmental AnalysisSc…

Strategic Management - Importance of Internal Factor Analysis

Internal Factor Analysis Summary 1. Internal factor includes resources and function of an organization such as Marketing, finance, human resource, production/operation, research and development, management information system.

2. The internal factor can be controlled and influenced.

3. Internal factor looks at its own strength and weakness and then look at external factors by identifying opportunities and threats.

4. Internal factor analysis helps to establish long-term objectives, generate, evaluate, and select strategies i.e. strategy formulation.
Importance of Internal Factor Analysis 1. Internal factor analysis helps to analyze its resources and functional strengths and weaknesses.

2. Internal factor analysis helps to understand the factors and work upon those factors so as to gain competitive advantage, growth, profitability in the firm.

3. Internal factor analysis helps to internally assess the organization and formulate, implement, and evaluate the strategic plan and cross-func…