This predictor improves the compression for sounds with rich harmonics (containing multiples of a single fundamental frequency, locked in phase) present in many musical instruments and human voice.
In July 2002, the Moving Picture Experts Group issued a call for proposals of lossless audio coding procedures to be sent in before December.
Seven companies submitted their proposals which were examined taking into consideration compression efficiency, complexity and flexibility.
By July 2003, Lossless Predictive Audio Compression (LPAC) was selected as the first draft for the future standard.
The reference model was further developed under participation of Technische Universität Berlin (TUB), RealNetworks, and Nippon Telegraph and Telephone (NTT).