What is data compression?
In computer science and information theory, data compression is the process of encoding information using fewer bits than an unencoded representation would use through use of specific encoding schemes.
What is a data compression ratio?
A data compression ratio is also known as a compression power. This is a computer -science term used to quantify the reduction in data representation size produced by a data compression algorithm. The data compressio ratio is analogous to the physical compression ratio used to measure physical compression of substances. This is defined as the ratio between the uncompressed size and the compressed size.
Why is data compression an important technique for the online world?
The data compression is an important technique for the online world because it is helpful for their data compressed and uncompressed.
What is the difference between Lossy and Lossless data compression?
Lossless compression shemes are reversible so that the original data can be reconstructed, while lossy shemes accept some loss od data in order to acheive higher compression.
Which method offers the greatest compression ratio?
The compressio ratio of lossy video is nearly always far superior to that of the audio and still-image equivalents. Video can be compressed immensely with little visible quality loss.
Why is human psychology and perception an important factor in methods of Lossy compression?
In some cases the ideal is a file which provides exactly the same perception as the original, with as much digital information as possible removed.
Name Lossy file formats for audio, still image and video format.
Lossy compression is transprent which can be verified via an ABX test.
Image:
JBIG2
PGF, Progressive Graphics File(lossless or lossy compression)
Wavelet compression
S3TC Texture compression for 3D computer graphics hardware.
Video:
H.261
H.263
H.264
MNG (supports JPEG sprites
Audio:
AAC
ADPCM
ATRAC
Dolby AC-3
30 June, 2009
29 June, 2009
Rss feed
Define RSS Feed?
RSS stands for Really Simple Syndication.
It is the format for distributing news and other web content. When you put content into RSS and send that content to other people or websites, it's called a feed.
What goes in the feed?
You can add text, audio, images, logos and video to a feed. The feed contains an index - a list of items - and each one is identified by a link o the content on your site. Most RSS feeds include a title for the link and a description of the content. When syndicating your content, use an eye-catching title and interesting description of the full content.
What can a feed do for you?
The RSS feeds keeps your audience updated. They let people see your content without going to the website.
How are feeds different from email?
The feeds are similar to emails but not quite the same thing. It updates your profile but it doen't let you know.
How do people read feed?
Reading the feeds is similar fro using a radio. The station sends out the programs and you would need a radio to pick up their shows.
How do you find the feeds you want to subscribe to?
Subscibing your feeds with search engines, this will increase your search engine visibility.
RSS stands for Really Simple Syndication.
It is the format for distributing news and other web content. When you put content into RSS and send that content to other people or websites, it's called a feed.
What goes in the feed?
You can add text, audio, images, logos and video to a feed. The feed contains an index - a list of items - and each one is identified by a link o the content on your site. Most RSS feeds include a title for the link and a description of the content. When syndicating your content, use an eye-catching title and interesting description of the full content.
What can a feed do for you?
The RSS feeds keeps your audience updated. They let people see your content without going to the website.
How are feeds different from email?
The feeds are similar to emails but not quite the same thing. It updates your profile but it doen't let you know.
How do people read feed?
Reading the feeds is similar fro using a radio. The station sends out the programs and you would need a radio to pick up their shows.
How do you find the feeds you want to subscribe to?
Subscibing your feeds with search engines, this will increase your search engine visibility.
16 June, 2009
10 June, 2009
New terms relating to audio files
Stereo
A system or equipment for reproducing stereophonic sound.
Channel
A path for the transfer of signals or data within a computer or between a computer and its peripheral equipment.
Track
A data-recording path on a storage medium, as a magnetic disk, tape, or drum, that is accessible to a read-write head in a given position as the medium moves past.
Frequency
The number of items occurring in a given category.
Hertz
The SI unit of frequency, equal to one cycle per second. Abbreviation:
Decibel
A unit used to compare two voltages or currents, equal to 20 times the common logarithm of the ratio of the voltages or currents measured across equal resistances. Abbreviation: dB, db
Wav, mp3, aiff
This is a list of different audio files.
These are new terms i learnt relating to audio files.
Stereo
A system or equipment for reproducing stereophonic sound.
Channel
A path for the transfer of signals or data within a computer or between a computer and its peripheral equipment.
Track
A data-recording path on a storage medium, as a magnetic disk, tape, or drum, that is accessible to a read-write head in a given position as the medium moves past.
Frequency
The number of items occurring in a given category.
Hertz
The SI unit of frequency, equal to one cycle per second. Abbreviation:
Decibel
A unit used to compare two voltages or currents, equal to 20 times the common logarithm of the ratio of the voltages or currents measured across equal resistances. Abbreviation: dB, db
Wav, mp3, aiff
This is a list of different audio files.
These are new terms i learnt relating to audio files.
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