Long Term Prediction (LTP) is a method for voice compression in GSM networks
. With the prediction about the probable signal course in the next time interval, an optimization of the voice transmission is possible. The LTP method is used in conjunction
withRegular Pulse Excitation
(RPE). Long Term Prediction (LTP) is also used in MPEG-4 to improve the MAIN profile. The prediction in this regard is based on low complexity arithmetic operation. In addition, Long Term Prediction is used in Advanced Audio Coding (AAC) to lower the bit rate.