Spectral Band Replication

The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

Spectral Band Replication (SBR) is a parametrical coding method developed by CodingTechnologies to enhance audio quality at low bitrates.

Guessing the nontransmitted higher frequency range of a compressed audio file by using some helper bits (transmited with the stream) in addition to the transmitted base band. SBR allows a restoration (not reconstruction) of the upper frequency range without lots of bits. It is used by MP3Pro, HE AAC and Digital Radio Mondiale.

References