A report on Data compression
Process of encoding information using fewer bits than the original representation.
- Data compression85 related topics with Alpha
Lossy compression
30 linksIn information technology, lossy compression or irreversible compression is the class of data compression methods that uses inexact approximations and partial data discarding to represent the content.
Discrete cosine transform
20 linksA discrete cosine transform (DCT) expresses a finite sequence of data points in terms of a sum of cosine functions oscillating at different frequencies.
A discrete cosine transform (DCT) expresses a finite sequence of data points in terms of a sum of cosine functions oscillating at different frequencies.
The DCT, first proposed by Nasir Ahmed in 1972, is a widely used transformation technique in signal processing and data compression.
MP3
17 linksCoding format for digital audio developed largely by the Fraunhofer Society in Germany, with support from other digital scientists in the United States and elsewhere.
Coding format for digital audio developed largely by the Fraunhofer Society in Germany, with support from other digital scientists in the United States and elsewhere.
With regard to audio compression (the aspect of the standard most apparent to end-users, and for which it is best known), MP3 uses lossy data-compression to encode data using inexact approximations and the partial discarding of data.
Video coding format
14 linksContent representation format for storage or transmission of digital video content (such as in a data file or bitstream).
Content representation format for storage or transmission of digital video content (such as in a data file or bitstream).
It typically uses a standardized video compression algorithm, most commonly based on discrete cosine transform (DCT) coding and motion compensation.
Image compression
11 linksImage compression is a type of data compression applied to digital images, to reduce their cost for storage or transmission.
Advanced Video Coding
16 linksVideo compression standard based on block-oriented, motion-compensated coding.
Video compression standard based on block-oriented, motion-compensated coding.
AVC-Intra is an intraframe-only compression format, developed by Panasonic.
High Efficiency Video Coding
10 linksVideo compression standard designed as part of the MPEG-H project as a successor to the widely used Advanced Video Coding (AVC, H.264, or MPEG-4 Part 10).
Video compression standard designed as part of the MPEG-H project as a successor to the widely used Advanced Video Coding (AVC, H.264, or MPEG-4 Part 10).
In comparison to AVC, HEVC offers from 25% to 50% better data compression at the same level of video quality, or substantially improved video quality at the same bit rate.
Lossless compression
15 linksLossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss of information.
Advanced Audio Coding
11 linksAdvanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression.
Moving Picture Experts Group
8 linksThe Moving Picture Experts Group (MPEG) is an alliance of working groups established jointly by ISO and IEC that sets standards for media coding, including compression coding of audio, video, graphics, and genomic data; and transmission and file formats for various applications.