A comparison between vocal tract and auditory feature analysis in ASR systems
Yong Gu, John S. D. Mason · 1987
A perceptualiy based linear predictive (PLP> speech anaiysis technique ttas been developed by Hermansky [1 l.in this paper we discuss applications of PLP analysis and investigate the performance by comparison with standard iinear predictive (LP) analysis in an autornatic speech recognition and the root-power sums (RPS>.are used to mako a cornparison for both PLP and LP.lt shows that RPS distanco measurcment has trte best performance for PLP.ln the secend exporimont.tt1e cornparison between PLP and LP analysis is evaiuated for various ordors, using ttw RPS distance measure.lt is shown that using PLP of order 5 givos better performance than conventional LP order 10 in ~-:.pcakordopondent recognition giving at least 2:1 reduction in data and in proceG:.>ingrequirernents.