Title :
Wideband speech coding using MELP model
Author :
Lin, Wei Ran ; Koh, Soo Ngee ; Lin, Xiao
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
In this paper, we consider the use of the mixed excitation linear prediction (MELP) model for coding wideband speech signals. In order to achieve a reasonably good subjective quality for the decoded speech and to maintain a low operating bit rate, some modifications to the LP analysis/synthesis stage, pitch estimation, and post filtering of the standard MELP model are needed. With the proposed coder operating at a bit rate below 8 kbit/s, subjective quality of the decoded speech is found to be close to that of G.722 operating at 48 kbit/s
Keywords :
filtering theory; linear predictive coding; speech coding; 8 kbit/s; MELP model; decoded speech; linear prediction analysis/synthesis; low bit rate coding; mixed excitation linear prediction; pitch estimation; post filtering; subjective quality; wideband speech coding; Band pass filters; Bit rate; Frequency; Performance analysis; Predictive models; Signal processing; Speech analysis; Speech coding; Speech processing; Wideband;
Conference_Titel :
Signal Processing and Its Applications, 1999. ISSPA '99. Proceedings of the Fifth International Symposium on
Conference_Location :
Brisbane, Qld.
Print_ISBN :
1-86435-451-8
DOI :
10.1109/ISSPA.1999.818218
