izer ▁digital ▁signal ▁processor ▁integrated ▁circ uits ▁created ▁by ▁Texas ▁Inst ru ments ▁beginning ▁in ▁ 1 9 7 8 . ▁They ▁continued ▁to ▁be ▁developed ▁and ▁market ed ▁for ▁many ▁years , ▁though ▁the ▁speech ▁department ▁moved ▁around ▁several ▁times ▁within ▁T I ▁until ▁finally ▁dissol ving ▁in ▁late ▁ 2 0 0 1 . ▁The ▁rights ▁to ▁the ▁speech - specific ▁subset ▁of ▁the ▁M SP ▁line , ▁the ▁last ▁remaining ▁line ▁of ▁T I ▁speech ▁products ▁as ▁of ▁ 2 0 0 1 , ▁were ▁sold ▁to ▁S ens ory , ▁Inc . ▁in ▁October ▁ 2 0 0 1 . ▁ ▁Theory ▁Spe ech ▁data ▁is ▁stored ▁through ▁pitch - ex c ited ▁linear ▁predict ive ▁coding ▁( PE - L PC ), ▁where ▁words ▁are ▁created ▁by ▁a ▁lattice ▁filter , ▁select ably ▁fed ▁by ▁either ▁an ▁exc itation ▁R OM ▁( cont aining ▁a ▁gl ott al ▁pul se ▁wave form ) ▁or ▁an ▁L FS R ▁( linear ▁feedback ▁shift ▁register ) ▁noise ▁generator . ▁Linear ▁predict ive ▁coding ▁ach ieves ▁a ▁vast ▁reduction ▁in ▁data ▁volume ▁needed ▁to ▁re create ▁intellig ible ▁speech ▁data . ▁ ▁History ▁The ▁T MC 0 2 8 0 / T MS 5 1 0 0 ▁was ▁the ▁first ▁self - cont ained ▁L PC ▁speech ▁synth es izer ▁IC ▁ever ▁made . ▁It ▁was ▁designed ▁for ▁Texas ▁Inst ru ments ▁by ▁Larry ▁Br ant ingham , ▁Paul ▁S . ▁Bre ed lo ve , ▁Richard ▁H . ▁W igg