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Design limitations of MP3 |
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There are several limitations inherent to the MP3 format that cannot be overcome by using a better encoder. More recent audio-compression formats such as Vorbis, AAC, Musepack and WMA no longer have these limitations.
In technical terms, MP3 is limited in the following ways:
In constant bitrates, bitrates are limited to a maximum of 320 kbit/s
Time resolution can be too low for highly transient signals
Encoder/decoder overall delay is not defined
No scaleband factor for frequencies above 15.5/15.8 kHz
Joint stereo is done on a frame-to-frame basis
Nevertheless a well-tuned MP3 encoder can perform competitively even with these restrictions.
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