Title :
An instantaneous amplitude model based speech coder
Author :
Yu, Cong ; Li, Gang ; Huang, Chaogeng
Author_Institution :
Coll. of Inf. Eng., Zhejiang Univ. of Technol., Hangzhou, China
Abstract :
In this paper, a new algorithm for speech coding is proposed. This algorithm is based a revised sinusoidal model, in which each component is represented with two instantaneous amplitudes and a frequency. This model avoids the difficulty in estimating the highly nonlinear phases and allows one to optimize the amplitudes once the frequencies are estimated. Simulations indicate that the proposed model can represent speech signals very well. Furthermore, based on this model, a speech coder is developed, in which all the estimated magnitudes are approximated with a four-parameter model. With the four parameters, the obtained phases and frequencies encoded using the simplest linear (scalar) quantization, a 16.64 kb/s speech coder yielding high quality synthetic speech signals.
Keywords :
frequency estimation; nonlinear estimation; signal processing; speech coding; speech synthesis; vocoders; frequency estimation; instantaneous amplitude model; linear scalar quantization; nonlinear phase estimation; sinusoidal model; speech coder; speech coding; synthetic speech signals; Amplitude estimation; Bit rate; Chaotic communication; Frequency estimation; Phase estimation; Quantization; Speech coding; Speech processing; Speech synthesis; Videoconference;
Conference_Titel :
Information, Communications and Signal Processing, 2009. ICICS 2009. 7th International Conference on
Conference_Location :
Macau
Print_ISBN :
978-1-4244-4656-8
Electronic_ISBN :
978-1-4244-4657-5
DOI :
10.1109/ICICS.2009.5397505