The RAR file format was developed by Eugene Roshal (hence the name RAR: Roshal ARchive), who was born on March 10, 1972 in Russia and graduated from Chelyabinsk Technical University.
As computing power has increased, users have responded by preferring compression algorithms which achieve a better rate of compression at the expense of computational time when compressing and decompressing. RAR compression operations are typically much slower than compressing the same data with early compression algorithms like ZIP and gzip, but a much better rate of compression is achieved whenever the data can still be compressed further.
Apart from the excellent rate of compression, RAR has several other features not previously found in many other archive formats, which has contributed greatly to its popularity:
1>Its handling of split volumes is very good. Multi-volume files have wide use though, mainly because they're generally easier to handle
2>RAR archives can be of a solid format, in which all of the compressed files are treated as a single data block. Most currently used compression formats (with the exception of the older ZIP) allow solid structuring.
3>It features strong encryption capabilities. Older versions of the file format used a proprietary algorithm; newer versions use the AES
4>Extra redundancy can be added to an archive, making it more resistant to corruption. Even if part of an archive is damaged, it may be possible to fully recover the stored data if a large enough "recovery record" exists.
5>While RAR does not compress PCM audio as well as WavPack, Monkey's Audio or FLAC, this feature is of considerable benefit to musicians and composers, as entire projects can be backed up and compressed properly
6>(Win)RAR also has the capability of storing NTFS streams and security information within the archive – information that is usually lost on compression.
7>RAR files can be embedded in other file types, probably the most common being JPEG. Image handling programs, browsers, and other utilities usually ignore any additional data after the end of the image, while RAR ignores anything before the RAR header.
8>RAR allows six levels (0–5) of compression unlike most other archive formats, which feature ten (0–9)
**YES** Mp3 files are another form or compressed files -->MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a popular digital audio encoding and lossy compression format, designed to greatly reduce the amount of data required to represent audio, yet still sound like a faithful reproduction of the original uncompressed audio to most listeners
Because MP3 is a lossy format, it is able to provide a number of different options for its "bit rate" — that is, the number of bits of encoded data that are used to represent each second of audio. Typically, rates chosen are between 128 and 320 kilobit per second.
n technical terms, MP3 is limited in the following ways:
* Bitrate is limited to a maximum of 320 kbit/s
* Time resolution can be too low for highly transient signals, causing some smearing of percussive sounds
* Frequency resolution is limited by the small long block window size, decreasing coding efficiency
* No scale factor band for frequencies above 15.5/15.8 kHz
* Joint stereo is done on a frame-to-frame basis
* Encoder/decoder overall delay is not defined, which means lack of official provision for gapless playback. However, some encoders such as LAME can attach additional metadata that will allow players that are aware of it to deliver gapless playback.
You can convert MP3 files to RAR and vice versa
you can try software called WINRAR 3.51...tht would do all good for you
2006-09-21 01:50:10
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answer #1
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answered by Neeraj Yadav♥ 6
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Let me make this sound so you might understand it. .rar looks like a bunch of books with a little rope around it. Thats exactly what it is, a lot of information all packed together.
Its quite easy to open those books so you can read them.
download this tiny application: http://www.download.com/3000-2250-10007677.html
Thats the tool you need to unpack those .rar files you have so you can read or listen to them.
Once you have it installed on your computer, just go to your .rar file and double click on the first packet.
It will automatically take you to your downloaded unpacking tool.
Just click on EXTRACT TO at the top of that page, and place the unpacked file anywhere you like. Should take only a few moments and your .rar file is unpacked or unzipped or however you want to say it.
Then go to the file you placed it in, you should see a complete file now, a video, or data, or music.
Good luck
2006-09-21 08:25:06
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answer #2
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answered by loisa sbral 2
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Its a compression program similar to Winzip.....u have to have WinRar installed and then u can unfold all of urs .rar files with it.
2006-09-21 08:17:29
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answer #3
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answered by Aman S. 2
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