Title :
An efficient framework for MPEG-4 HVXC encoder based on the multi-stage V/UV decision
Author :
Huang, E-Chan ; Yang, Jar-Ferr
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan
Abstract :
In this paper, we propose an efficient harmonic vector excitation coder (HVXC) speech encoder by using the framework of multi-stage voiced/unvoiced (V/UV) detection algorithm. With introducing the pre-stages V/UV decision, we embed the decision tree classifiers with coding procedure. Consequently, the first two stages of V/UV detection do not increase any extra computation to decide unvoiced speech in advance such that the modified HVXC encoder can adaptively adjust the flow of encoder functions to save the computation
Keywords :
decision trees; signal detection; speech coding; vocoders; MPEG-4 HVXC speech encoder; decision tree classifiers; encoder functions; harmonic vector excitation coder; multistage unvoiced detection algorithm; multistage unvoiced detection decision; multistage voiced detection algorithm; multistage voiced detection decision; Computational complexity; Linear predictive coding; MPEG 4 Standard; Predictive models; Quantization; Signal analysis; Speech analysis; Speech coding; Vectors; Virtual manufacturing;
Conference_Titel :
Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on
Conference_Location :
Tainan
Print_ISBN :
0-7803-8660-4
DOI :
10.1109/APCCAS.2004.1413079
