- Digital Data Representation
- Representing Numerical Data
- Representing Text Data
- ASCII
- Unicode
- Coding system for Graphic Data
- Audio Data
- Video Data
• Digital Data Representation:
Representing data in a form that can be understood by a digital computer is called digital data representation. Digital data is represented using a binary number system, which consists of only two digits: 0 and 1. This binary representation is used to represent all types of data, including numbers, text, images, sound, and video.
• Representing Numerical Data:
Numerical data is represented using a fixed-point or floating-point representation. Fixed-point representation stores numbers in a specific number of bits, with the leftmost bits representing the sign and the remaining bits representing the magnitude of the number. Floating-point representation stores numbers using a sign, a mantissa, and an exponent. The mantissa represents the significant digits of the number, and the exponent represents the power of 10 by which the mantissa is multiplied.
• Representing Text Data:
While numerical data is represented by the binary numbering system, text-based data is represented by binary coding systems specially developed for text-based data namely, ASCII, EBCDIC and Unicode.
These codes are used to represent all characters that can appear in text data such as numbers, letters, and special characters and symbols like dollar sign, comma, percentage etc.
Note: EBSDIC stands for Extended Binary-Coded Decimal Interchage Code. It represents each character as a unique combination of 8 bits which allows 256 unique combination• ASCII:
ASCII (American Standard Code for Information Interchange) is a character encoding standard that assigns a unique 7-bit binary code to each letter, numeral, punctuation mark, and control character. ASCII is widely used in computers and telecommunications equipment.
• Unicode:
Unicode is a universal international coding standard designed to represent text-based data written in any ancient or modern language. It defines each character using 0s and 1s, no matter which language, program or computer platfrom is being used.
• Coding system for Graphic Data:
Graphic data is represented using a variety of encoding schemes, including JPEG, PNG, and GIF. These encoding schemes compress the graphic data to reduce its file size and improve its transmission efficiency.
• Audio Data:
Audio data is represented using a variety of formats, including MP3, WAV, and AAC. These formats encode the sound waves as digital data, which can be stored, transmitted, and played back by computers and other devices.
• Video Data:
Video data is represented using a variety of formats, including MP4, AVI, and MOV. These formats encode the sequence of images that make up a video, along with the audio data that accompanies the video.
I hope this explanation is helpful. Please let me know if you have any other questions.
