Re: [MP3 ENCODER] definition of kbps
It seems to be quite common to use the prefix "K" to refer to multiples of 1024, and "k" for mutliples of 1000, but I don't know if this is formalised anywhere. Similarly "B" for bytes and "b" for bits... 64KB of memory vs. 64kbps MP3. K is used for both multiples of 1000 and 1024. 1024 is commonly used for binary-related calculations and units,as Kb (Kilobyte). One exceptions is made by the hard disk manufacturers/sellers, who use 1000 instead (the same doesn occur for another kinds of media). Despite the right case for multipliers is uppercase (K, M), the same for measure unit symbols wich their names are derived from real people (Newton, Watt) with the exceptions of greek symbols (Ohm - greek Omega). Lower case is used for non-real-people derived units, like byte (BinarY TErm - b), seconds (s). As bit doesn't have a right way to represent it as one character, most people use the term as is: 64 _bits_ or 64 _Kbit_ (in the case of multipliers). The term Kbps to represent data transfer speed in bits is absolutely wrong, as bit is "bit", and Kbps is K (1000 or 1024) * byte * p (?) * s (second). The right way could be Kbit/s. The term Kbps is widely used, but it not a "canonical" representation. Taupter -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] definition of kbps
From: "Taupter" [EMAIL PROTECTED] [...] the right case for multipliers is uppercase (K, M), [...] ITYM all multipliers except k - kHz, km, etc. -- Mat. -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] definition of kbps
Mathew Hendry wrote: From: "Taupter" [EMAIL PROTECTED] [...] the right case for multipliers is uppercase (K, M), [...] ITYM all multipliers except k - kHz, km, etc. No. Surely KHz, Km, et cetera el al. Taupter -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] definition of kbps
Taupter wrote: Mathew Hendry wrote: From: "Taupter" [EMAIL PROTECTED] [...] the right case for multipliers is uppercase (K, M), [...] ITYM all multipliers except k - kHz, km, etc. No. Surely KHz, Km, et cetera el al. You're joking, right ? kilo is 'k' , at least by SI ( the standard for measure units ). deka is 'da' hecto is 'h' centi is 'c' deci is 'd' mili is 'm' micro is a greek letter , usualy 'u' is used in ASCII texts nano is 'n' pico is 'p' mega is 'M' 1E6 giga is 'G' 1E9 tera is 'T' 1E12 peta is 'P' 1E15 exa is 'X' ? 1E18 yotta is 'Y' ? 1E21 # zetta is 'Z' ? 1E24 # this two I got from that ISO draft document I can't find anymore david balazic -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
RE: [MP3 ENCODER] definition of kbps
From: Taupter [mailto:[EMAIL PROTECTED]] Mathew Hendry wrote: From: "Taupter" [EMAIL PROTECTED] [...] the right case for multipliers is uppercase (K, M), [...] ITYM all multipliers except k - kHz, km, etc. No. Surely KHz, Km, et cetera el al. Nope, however sensible that might be. One reference http://physics.nist.gov/cuu/Units/prefixes.html Also see http://physics.nist.gov/cuu/Units/binary.html Apparently we should now be talking about "mebibytes" (MiB) of memory rather than megabytes :) -- Mat. -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] definition of kbps
Taupter wrote: The term Kbps to represent data transfer speed in bits is absolutely wrong, as bit is "bit", and Kbps is K (1000 or 1024) * byte * p (?) * s (second). The right way could be Kbit/s. The term Kbps is widely used, but it not a "canonical" representation. Are you _sure_ that the term kbps used for transfer rate is wrong? I don't think so. If you take them as k*b*p(?)*s then why not mph [miles per hour] is m*p(?)*s. You can take the "p" as 1/x. Here x is s, so - kbps and kbit/s means the same. That's the idea that I get. Any comments? - Zia -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] definition of kbps
Zia Mazhar wrote: Taupter wrote: The term Kbps to represent data transfer speed in bits is absolutely wrong, as bit is "bit", and Kbps is K (1000 or 1024) * byte * p (?) * s (second). The right way could be Kbit/s. The term Kbps is widely used, but it not a "canonical" representation. Are you _sure_ that the term kbps used for transfer rate is wrong? I don't think so. If you take them as k*b*p(?)*s then why not mph [miles per hour] is m*p(?)*s. You can take the "p" as 1/x. Here x is s, so - kbps and kbit/s means the same. That's the idea that I get. Any comments? mph is wrong too :-) some also use kph for km/h and ksps ( kilo samples per second ) those ( including kbps ) are all "unofficial" as far as I can tell. P.S.: "p" stands obviously for "per" , which means (more-or-less) the same as "/" david balazic -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] definition of kbps
About kbps kbit/s and more : ftp://ftp.informatik.uni-erlangen.de/pub/doc/ISO/information-units Perhaps we can now end this discussion and accept kbps AND kbit/s as understandable units for '10^3bit per second' and go on to other more LAME-related questions ... A+ Christian -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] definition of kbps
You can take the "p" as 1/x. Here x is s, so kbps and kbit/s means the same. Yes, and could also be written : kbs (exponent: minus one) From rules used in biochemistry. (same rules?) But in a book or Word, not in a mail Roger - -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
RE: [MP3 ENCODER] definition of kbps
It's definately not frmalised - think about the next step up - Mega which is prefixed by a capital M, while the lower case m represents the prefix 'mili' Scott Manley (aka Szyzyg) /-- _@/ Mail -\ ___ _ _ __ __ _ | Armagh Observatory | / __| __ ___| |_| |_ | \/ |__ _ _ _ | |___ _ _ | Armagh | \__ \/ _/ _ \ _| _| | |\/| / _` | ' \| / -_) || | | Northern Ireland | |___/\__\___/\__|\__| |_| |_\__,_|_||_|_\___|\_, | | BT61 9DG. | http://star.arm.ac.uk/~spm/welcome.html |__/ \=/ On Tue, 18 Apr 2000, Mathew Hendry wrote From: Jack Moffitt [mailto:[EMAIL PROTECTED]] networks are measured with k = 1000. storage is measured with k = 1024. this is how it has traditionally been. It seems to be quite common to use the prefix "K" to refer to multiples of 1024, and "k" for mutliples of 1000, but I don't know if this is formalised anywhere. Similarly "B" for bytes and "b" for bits... 64KB of memory vs. 64kbps MP3. -- Mat. -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ ) -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] definition of kbps
networks are measured with k = 1000. storage is measured with k = 1024. this is how it has traditionally been. jack. On Mon, 17 Apr 2000, Shawn Riley wrote: Is 1 kilobit per second supposed to be 1024 bits per second, or 1000 bits per second? Shawn -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ ) -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] definition of kbps
In mp3 audio it's 1000 bits per second, in Microsoft's media formats it's 1024 bits per second mark told me it was so they could say they could say they took the same amount of space (128kbps) even though they squeezed more data in there. the cheaters. jack. -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
RE: [MP3 ENCODER] definition of kbps
From: Jack Moffitt [mailto:[EMAIL PROTECTED]] networks are measured with k = 1000. storage is measured with k = 1024. this is how it has traditionally been. It seems to be quite common to use the prefix "K" to refer to multiples of 1024, and "k" for mutliples of 1000, but I don't know if this is formalised anywhere. Similarly "B" for bytes and "b" for bits... 64KB of memory vs. 64kbps MP3. -- Mat. -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] definition of kbps
Mathew Hendry wrote: From: Jack Moffitt [mailto:[EMAIL PROTECTED]] networks are measured with k = 1000. storage is measured with k = 1024. this is how it has traditionally been. It seems to be quite common to use the prefix "K" to refer to multiples of 1024, and "k" for mutliples of 1000, but I don't know if this is formalised anywhere. Similarly "B" for bytes and "b" for bits... 64KB of memory vs. 64kbps MP3. There is a ISO draft or proposal or something that says : bk bM bG , as binary kilo , binary mega etc are powers of two ( 1024 etc... ) b is short for byte ( I'm not sure about this ) bit should not be abbreviated , unless it is clear from context that it is bit and not something else ( byte for example ). B is already used for Bell. This document is on the web , but I forgot the URL :-( david -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
Re: [MP3 ENCODER] definition of kbps
On Mon, 17 Apr 2000, Scott Manley wrote: Is 1 kilobit per second supposed to be 1024 bits per second, or 1000 bits per second? In mp3 audio it's 1000 bits per second, in Microsoft's media formats it's 1024 bits per second Most communications stuff uses standard SI prefixes. -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
