What is Mp3 Pro Technology?
To improve the sound quality of mp3 at lower bit rates, Coding Technologies has developed an enhancement technology that gives back the sound the high frequency components. The technology is called “Spectral Band Replication” (SBR). SBR is a very efficient method to generate the high frequency components of an audio signal. Why Mp3 Pro Technology? Listening to music compressed with mp3 at 128 kbps sounds great. But if you go to lower bit rates the great sound starts lacking the high frequency components. At bit rates of 64 kbps and below the music may begin to sound dull. The reason is that mp3 at these bit rates runs out of bits to compress the music in full audio bandwidth and with significant detail. In this situation the developers of mp3 had to decide whether their codec should produce mp3 music with distortion (so called “coding artefacts”) or with limited bandwidth. They opted for limited bandwidth. And as a result, you experience lower bit rate mp3 as band-limited music with ju
