Encoding and decoding are used in many forms of communications, including computing, data communications, programming, digital electronics and human communications. These processes involve altering the format of content material for optimal transmission or storage.
In computer systems, encoding is the process of putting a sequence of characters (letters, numbers, punctuation, and certain symbols) into a specialized format for environment friendly transmission or storage. Decoding is the opposite process -- the conversion of an encoded format back into the original sequence of characters.
These terms should not be confused with encryption and decryption, which give attention to hiding and securing data. (We will encrypt data without altering the code or encode data without deliberately concealing the content.)
What's encoding and decoding in data communications?
Encoding and decoding processes for data communications have fascinating origins. For example, Morse code emerged in 1838 when Samuel Morse created standardized sequences of two signal durations, called dots and dashes, for use with the telegraph. At the moment's newbie radio operators still use Q-signals, which evolved from codes the British Postmaster Normal created in the early 1900s to ease communication amongst British ships and coast stations.
Internet access relies on encoding. A Uniform Resource Locator (URL), the address of a webpage, can only be sent over the internet utilizing the American Normal Code for Info Interchange (ASCII), which is the code used for text files in computing.
In an ASCII file, a 7-bit binary number represents each character, which can be highercase or lowercase letters, numbers, punctuation marks and other common symbols. Nonetheless, URLs cannot contain spaces and often have characters that are not within the ASCII character set. URL encoding, also called p.c encoding, addresses this by way of the conversion of areas -- to a + sign or with %20 -- and non-ASCII characters into a valid ASCII format.
Some ways encoding and decoding are utilized in numerous programming languages include the following.
Encoding and decoding in Java is a method of representing data in a different format to efficiently switch info by way of a network or the web. The encoder converts data right into a web representation. Once acquired, the decoder converts the web representation data into its original format.
In the Python programming language, encoding represents a Unicode string as a string of bytes. This commonly happens if you switch an occasion over a network or save it to a disk file. Decoding transforms a string of bytes into a Unicode string. This happens when you obtain a string of bytes from a disk file or the network.
What is encoding and decoding in digital electronics?
In electronics, the terms encoding and decoding reference analog-to-digital conversion and digital-to-analog conversion. These terms can apply to any type of data, including textual content, images, audio, video, multimedia and software, and to signals in sensors, telemetry and management systems.
What is encoding and decoding in human communication?
Folks don't think about it as an encoding or decoding process, but human communication begins when a sender formulates (encodes) a message. They choose the message they will convey and a communication channel. Individuals do this every day with little thought to the encoding process.
The receiver should make sense of (decode) the message by deducing the that means of words and phrases to interpret the message correctly. They then can provide feedback to the sender.
Both the sender and receiver in any communication process must deal with noise that can get in the way of the communication process. Noise involves the varied ways that messages get disrupted, distorted or delayed. These can embody actual physiological noise, technical problems or semantic, psychological and cultural issues that get within the way of communication.
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