MPEG - , (Moving Picture Experts Group - MPEG). MPEG, MPEG-1 1992 . , , Video CD. , . MPEG : Layer I, Layer II, Layer III. Layer III , .
MP3 (MPEG Layer 3)
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. () , , , . , Audio CD. / ( ).
, (kbps ). , -, . MP3 8 320 /. , 128 /. 192 . MP3 , . MP3 320 , - .. 320 /., . MP3 , 64 /. MP3 ( , .)
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1. (. Constant BitRate - CBR)
2. (. Variable BitRate - VBR)
3. (. Average BitRate - ABR)
(BR constant bitrate).
, , .
(VBR variable bitrate).
(VBR). , ( ), . ( ), .
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ABR - VBR, .
ID3TAG .
MPEG I, II III (MPEG layer I, layer II and layer III) - MP3 . Studio3 (Eric Kemp) 1996 . MP3 ( , ..), ( 1).
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320 kbs | 4:1 | , CD. , . | , "" J |
256 kbs | 5:1 | . CD , | , . |
198 kbs | 7:1 | , , " " 128 kbs | |
160 kbs | 8:1 | , 128 kbs , 198 kbs, . | |
128kbs | 11:1 | . . , , | , Internet |
Mp3 . , , Mp3 , . , Mp3 , - .
WMA
WMA (Windows Media Audio) Microsoft, 3. .WMA .ASF, 3 (64 96kb/s) (196 256kb/s), .. .WMA.
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WMA WMA DRM, . 3--, .
- Mp3 , , .
WMA . ( , , Microsoft J)
Ogg Vorbis
Ogg Vorbis - . , 3 WMA, , 3. .
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, , 255.
, , 3.
Ogg vorbis , .
500kb/s.
AAC
AAC - Mp3 .
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- Mp3 .
- (watermarks), : , , .. , . , , , , .
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