There are different implementations, they are called:
ATRAC-1 (ATRAC1 Version 1)
ATRAC-2 (ATRAC1 Version 2)
ATRAC-3 (ATRAC1 Version 3)
ATRAC-4 (ATRAC1 Version 4)
ATRAC-4.5 (ATRAC1 Version 4.5)
They have the same bitstream syntax (ATRAC1), but different quality (like MP3's Xing vs. Lame). ATRAC-1 had many problems (pre-echos, metallic sound, 15 kHz bandwidth). The ATRAC-3 implementation was the first with good quality.
A CD is 1411.2kbps 44.1kHz 16bit stereo PCM, with basic error correction codes, with around 74~80 minutes of maximum capacity.
30 hours means 1800 minutes, divide 1800 with 74, and you get 24.324324324, so that means 24x times compression. Divide 1411.2kbps by 24.324324324 and you get around 58kbps.
One more try, divide 1800 with 80, get 22.5, divide 1411.2 by 22.5, get 62kbps.
So basically, they use they're saying they're using approx. 58~62kbps ATRAC3 on a CD. Doesn't sound all that nice to me.
(While consonant clusters can occur in a syllable-final position, they can't occur in a syllable-initial position.)
Syllable initial "double consonant letters" are entered by typing the same key twice. The "o" to the lower right corner and the "oo" to the upper right are to be used in compound vowels. (As part of sounds like "wa" or "wen".)
Due to the tri-segmented-layout (that's what sebulsik means, literally. Three Segment Type. Guess what doobulsik means.), typing in sebulsik Korean is very rhthmic. Left mid right, left right, left mid right, space, and so on.
IMHO Koreans should all use sebulsik and be proud of it's typing layout as well as it's writing system.. : )
Syllable-initial consonants to the right, syllable-final consonants and consonant clusters to the left. All possible consonant clusters in Modern Korean are accesible by using the shift key. (Some are even available without using the shift key.)
Harder to acquire the knack at first, but it pays off.
The official standard, researched and backed by the government, is the doobulsik. (Searching for Korean keyboard layouts on the web would most likely reveal the doobulsik. Heck, most people don't even know that the sebulsik exists.)
If you look carefully you'll notice that all consonants (squares, circles, shape-like things) are on the left and all vowels (stick-like things) are on the right, which means your left hand (the weaker hand, usually) will have a hard time pressing the much more frequent consonants, and be easily stressed out. Not good.
The sebulsik was the lifework of a Korean occulist, who put his life into making Korean typewriters and keyboards, despite all difficulties.
Picture here: http://sebul.org/ Click on the diagram and you'll get another picture.
Syllable initial consonants are on the right side, vowels are on the left side and parts of the top row, and syllable final consonants are on the far left.
The most frequent letters are mapped to the most easily accesible keys, and the mapping is nicely balanced: You don't have to stress your left hand anymore, and you use your index fingers a lot more than your little fingers. Nice. : )
If you can type 600 keys in a minute you're likely to be called a fast typist in Korea.
But there's more than one keyboard layout, (like with QWERTY vs. Dvorak), and users of the sebulsik keyboard layout (as opposed to the doobulsik) are known to achieve speeds of over 1000 keypresses a minute.
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Compression is, by definition, dropping the kbps..
Lossy compression works by dropping the file size in a way that's meant to be difficult to perceive.
I have no idea what you're trying to say : )
Codec is used in Sony's Minidisc recorders and the RealAudio 8 compression format.
Versions used by Minidisc:
There are different implementations, they are called:
They have the same bitstream syntax (ATRAC1), but different quality (like MP3's Xing vs. Lame). ATRAC-1 had many problems (pre-echos, metallic sound, 15 kHz bandwidth). The ATRAC-3 implementation was the first with good quality.
Versions used by RealAudio 8:
Links:
A CD is 1411.2kbps 44.1kHz 16bit stereo PCM, with basic error correction codes, with around 74~80 minutes of maximum capacity.
30 hours means 1800 minutes, divide 1800 with 74, and you get 24.324324324, so that means 24x times compression. Divide 1411.2kbps by 24.324324324 and you get around 58kbps.
One more try, divide 1800 with 80, get 22.5, divide 1411.2 by 22.5, get 62kbps.
So basically, they use they're saying they're using approx. 58~62kbps ATRAC3 on a CD. Doesn't sound all that nice to me.
(While consonant clusters can occur in a syllable-final position, they can't occur in a syllable-initial position.)
Syllable initial "double consonant letters" are entered by typing the same key twice. The "o" to the lower right corner and the "oo" to the upper right are to be used in compound vowels. (As part of sounds like "wa" or "wen".)
Due to the tri-segmented-layout (that's what sebulsik means, literally. Three Segment Type. Guess what doobulsik means.), typing in sebulsik Korean is very rhthmic. Left mid right, left right, left mid right, space, and so on.
IMHO Koreans should all use sebulsik and be proud of it's typing layout as well as it's writing system.. : )
Syllable-initial consonants to the right, syllable-final consonants and consonant clusters to the left. All possible consonant clusters in Modern Korean are accesible by using the shift key. (Some are even available without using the shift key.)
Harder to acquire the knack at first, but it pays off.
The official standard, researched and backed by the government, is the doobulsik. (Searching for Korean keyboard layouts on the web would most likely reveal the doobulsik. Heck, most people don't even know that the sebulsik exists.)
For a picture, look here: http://www.fivedeck.com/kboard.html
If you look carefully you'll notice that all consonants (squares, circles, shape-like things) are on the left and all vowels (stick-like things) are on the right, which means your left hand (the weaker hand, usually) will have a hard time pressing the much more frequent consonants, and be easily stressed out. Not good.
The sebulsik was the lifework of a Korean occulist, who put his life into making Korean typewriters and keyboards, despite all difficulties.
Picture here: http://sebul.org/ Click on the diagram and you'll get another picture.
Syllable initial consonants are on the right side, vowels are on the left side and parts of the top row, and syllable final consonants are on the far left.
The most frequent letters are mapped to the most easily accesible keys, and the mapping is nicely balanced: You don't have to stress your left hand anymore, and you use your index fingers a lot more than your little fingers. Nice. : )
If you can type 600 keys in a minute you're likely to be called a fast typist in Korea.
But there's more than one keyboard layout, (like with QWERTY vs. Dvorak), and users of the sebulsik keyboard layout (as opposed to the doobulsik) are known to achieve speeds of over 1000 keypresses a minute.
The Ogg Vorbis format itself is public domain.
The reference library is BSD-ish.
The reference tools are GPLed.