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what is bitrate?
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orbit
IsraTrance Full Member
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108
Posted : Dec 9, 2008 07:18:25
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hey guys
can someone explain technically what bit rate is all about?
also should i be bouncing everything off to 24bit?
ive also heard dithering is linked with bitrate, what is dithering? |
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vegetal
Vegetal/Peacespect
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1055
Posted : Dec 9, 2008 11:23
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Nectarios
Martian Arts
Started Topics :
187
Posts :
5292
Posted : Dec 9, 2008 12:37
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On 2008-12-09 11:23, vegetal wrote:
id rather say that bitrate = samplerate
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How so?
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Digital Audio is measured in two ways: Bit Rate Resolution and Sample Rate.
Sample Rate is the number of samples per second taken of the audio. 1Hz = 1 sample per second. RedBook CD (RBCD) is 44.1kHz = 44,100 samples per second.
Bit Rate Resolution is the digital word length of each sample. This determines how precise each sample is. Think of it this way. You can explain last night's concert more precise using 100 words rather than using 20 words. RBCD bit rate resolution is 16bit which gives a 65,535 word length. If a certain sample takes more than 65,535 words to describe than the sample will lose some information which results in distortion. The precision difference with bit rate is noticeable when you realize that most internet audio streams are at 8bit and digital telephones are at 4bit. Background noise is associated with lower bit rates.
So......If one second of audio is analogous to the view of your backyard, the RBCD digital representation of your backyard would be akin to looking at it through a screen door with 44,100 holes in the screen and 65,535 words or colors within each screen hole.
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http://soundcloud.com/martianarts |
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-aeon-
Aeon
Started Topics :
10
Posts :
546
Posted : Dec 9, 2008 12:37
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vegetal
Vegetal/Peacespect
Started Topics :
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1055
Posted : Dec 9, 2008 12:55
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Quote:
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On 2008-12-09 12:37, pipe&slippers wrote:
Quote:
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On 2008-12-09 11:23, vegetal wrote:
id rather say that bitrate = samplerate
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How so?
Quote:
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Digital Audio is measured in two ways: Bit Rate Resolution and Sample Rate.
Sample Rate is the number of samples per second taken of the audio. 1Hz = 1 sample per second. RedBook CD (RBCD) is 44.1kHz = 44,100 samples per second.
Bit Rate Resolution is the digital word length of each sample. This determines how precise each sample is. Think of it this way. You can explain last night's concert more precise using 100 words rather than using 20 words. RBCD bit rate resolution is 16bit which gives a 65,535 word length. If a certain sample takes more than 65,535 words to describe than the sample will lose some information which results in distortion. The precision difference with bit rate is noticeable when you realize that most internet audio streams are at 8bit and digital telephones are at 4bit. Background noise is associated with lower bit rates.
So......If one second of audio is analogous to the view of your backyard, the RBCD digital representation of your backyard would be akin to looking at it through a screen door with 44,100 holes in the screen and 65,535 words or colors within each screen hole.
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My bad, to early in the morning and no Coffe 
I was using corruted inverted logic 
Demand recognition for the Armenian genocide 1915
http://www.devilsmindrecords.org/
http://www.myspace.com/vegetalmusic
http://www.checkpoint-music.com/ |
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Colin OOOD
Moderator
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5380
Posted : Dec 9, 2008 15:53
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Chemogen
IsraTrance Full Member
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166
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713
Posted : Dec 9, 2008 20:12
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Dithering is the adding of a predetermined amount of white noise to the signal to minimize quantization errors. (This occurs when a random measurement of amplitude is assigned to a sample).
My lecturers claim that they can tell which DAW a mix was bounced out of by the dithering, which supposedly has its own kind of character from DAW to DAW.
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--==Bad Sector==--
Triamera
Started Topics :
69
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1812
Posted : Dec 9, 2008 21:12
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Upavas
Upavas
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3315
Posted : Dec 9, 2008 21:14
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Colin OOOD
Moderator
Started Topics :
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5380
Posted : Dec 9, 2008 23:30
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Elad
Tsabeat/Sattel Battle
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158
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5306
Posted : Dec 10, 2008 07:36
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piko_bianko
Oxya
Started Topics :
57
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974
Posted : Dec 10, 2008 08:23
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if i create a project in 22.05khz and resample it into 44.1khz, what will the additional 22050 samples be ? 
extreme |
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vegetal
Vegetal/Peacespect
Started Topics :
19
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1055
Posted : Dec 10, 2008 08:54
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Chemogen
IsraTrance Full Member
Started Topics :
166
Posts :
713
Posted : Dec 10, 2008 14:21
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When sampling at a rate of 22kHz, your highest freqency will be around 11kHz...I suppose the additional samples would make up the rest of your range. |
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Zoopy
IsraTrance Junior Member
Started Topics :
44
Posts :
538
Posted : Dec 10, 2008 18:46
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I just took my first term audio engineering final and I still can't really type out what the fuck they are talking about.
my teacher is awful though.
just use 24 bit |
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