A Low Bit Rate Speech Coder Based on the Inflection Point Detection

A low bit rate speech coder based on Gaussian adaptivewaveletsShubha

A low bit rate speech coder based on Gaussian adaptive wavelets is described. This speech coder ameliorates the problem of using two diierent mother wavelets to model voiced and unvoiced sounds as mentioned in. 1 In addition, it has been demonstrated in this paper, that Gaussian adaptive wavelets are better suited to model both voiced and unvoiced sounds as compared to Morlet and Daubechies' wa...

TTS based very low bit rate speech coder

This paper addresses a speech coder which uses a Text-To-Speech (TTS) synthesis system to achieve very low bit rates (sub lkbps). The main issue of the work is the accurate coding of the pitch(f0) and gain contours which are principle components of prosody. This is of paramount interest since the correct prosody will increase naturalness and an efficient coding scheme will provide high coding g...

Developing a Low Bit Rate Speech Coder Based on the Half Rate GSM Standard-'C30

This application report describes the development of a low bit rate speech coder based on the GSM HR (Half Rate) speech coding standard using the Texas Instruments (TI) TMS320C30 digital signal processor (DSP). 1 For storage applications, the delay introduced by the coder is not critical and the bit rate does not need to be constant. It is therefore possible to develop high performance coders w...

A very low bit rate speech coder based on a recognition/synthesis paradigm

Recent studies have shown that a concatenative speech synthesis system with a large database produces more natural sounding speech. We apply this paradigm to the design of improved very low bit rate speech coders (sub 1000 b/s). The proposed speech coder consists of unit selection, prosody coding, prosody modification and waveform concatenation. The encoder selects the best unit sequence from a...

Hybrid transform coder for low bit rate speech coding