Speech coding algorithms based on Algebraic Code Excited Linear Prediction (ACELP) quantize and code the residual signal with a fixed algebraic codebook. This paper generalizes the conventional encoding to provide optimal bit consumption for all codebook designs by enumerating all possible states. The codebook designed is aimed for constant bit-rate applications applied on mobile devices.
Bibliographic reference. Bäckström, Tom (2012): "Enumerative algebraic coding for ACELP", In INTERSPEECH-2012, 931-934.