The document discusses encoders and decoders as critical components in digital electronics and communication systems, highlighting their roles in converting digital data into analog signals and vice versa. It outlines the types of encoders (such as priority and decimal encoders) and decoders (like binary and BCD decoders), along with their applications in data conversion, communication systems, and digital electronics. Understanding these devices is essential for effectively handling data transfer and processing in digital technology.

1. GROUP PRESENTATION
SUBJECT NAME : DIGITAL PRINCIPLES AND
COMPUTER ORGANIZATION
SUBJECT CODE : 231ITS301T
TOPIC NAME : ENCODER AND DECODER
PRESENTED BY :
1. AKSHAY.R (07)
2. ANURANJANA. M.J (11)
3. ARCHIISH. B (13)
4. HEM KISHORRE (50)
5. JAINITHISH. M (55)

2. Introduction:
 Encoders and Decoders are digital ICs which are used for encoding and
decoding.
 An encoder is a device, circuit, or program that converts digital data into an
analogue signal.
 A decoder is a device, circuit, or program that converts an analogue signal into
digital data.
 Both encoder and decoder are multiple input and multiple output devices and
combinational logic circuits.
 The encoders and decoders are used in many electronics projects to compress
the multiple number of inputs into smaller number of outputs.

3. WHAT IS AN ENCODER?
 An encoder is a device, algorithm, or system
component that converts information from one format
or code to another.
 This process often involves translating data into a
more suitable or efficient representation for various
purposes such as processing, transmission, or storage.
 Encoders often use binary codes to represent the input
data, converting it into a digital format for processing.
 Encoders help reduce the number of signal lines
required for data transmission, improving efficiency
and reliability.

4. TYPES OF ENCODERS
 PRIORITY ENCODER:
Assigns a unique binary code to each input, with the highest priority input
taking precedence.
 DECIMAL ENCODER:
Converts decimal input into a binary output, commonly used in digital displays and
keypads.
 KEYBOARD ENCODER:
Translates the key pressed on a keyboard into a corresponding binary code for computer
input.

6. WHAT IS AN DECODER?
 A decoder is a device that converts a coded input signal
into a set of unique output signals.
 Decoders are often used to convert binary codes into
their corresponding decimal values.
 Decoders selectively activate specific output lines based
on the input signal they receive.
 The primary purpose of a decoder is to interpret or
reconstruct data that has been transformed into a
different format or code by an encoder.

7. TYPES OF DECODERS
 BINARY DECODERS:
A binary decoder is a digital circuit that converts binary input into a unique
output signal.
 PRIORITY DECODERS:
A priority decoder is a type of digital circuit that not only decodes binary inputs
but also resolves situations where multiple input lines might be active
simultaneously.
 BCD DECODERS:
A BCD (Binary-Coded Decimal) decoder is a digital circuit designed to
decode binary-coded decimal inputs into a format that can drive displays or
other output devices.

9. APPLICATIONS OF ENCODERS AND
DECODERS:
 Data conversion-
Encoders and decoders enable the conversion of data between different
formats and representations.
 Communication Systems-
They play a crucial role in transmitting and interpreting signals in
communication networks.

10.  Digital Electronics-
Encoders and decoders are fundamental components in digital circuits and
microprocessor-based systems.
 Computer Programming-
They are used in programming languages and digital input/output devices.

11. CONCLUSION:
 Encoders and decoders are essential building blocks in the
world of digital electronics and communication systems.
 They facilitate the conversion and interpretation of data,
enabling efficient and reliable data transfer and
processing.
 Understanding the principles and applications of these
devices is crucial for anyone working in the field of digital
technology.

12. THANK YOU!!