Articulatory analysis using a codebook for articulatory based low bit-rate speech coding
نویسندگان
چکیده
Fundamental to the success of the articulatory based speech coding is the mapping from acoustics to articulatory description. As the mapping is not unique and based on articulatory continuity criteria, the non-uniqueness of the articulatory trajectories is solved using a forward dynamic network. In this paper, we present new results on forward dynamic network used to estimate articulatory trajectories when using an improved articulatory codebook for acoustic-to-articulatory mapping. The improvement on the codebook design is based on a new model that provides more details on the vocal tract area function and on more appropriate articulatory parameter samplings according to the articulatory-acoustics relation.
منابع مشابه
Estimation of articulatory parameter trajectory from speech acoustic dynamics
This research aims to perform articulatory analysis as a basis for low bit-rate speech coding. The classical approach consists of gathering a large set of acoustic and articulatory vector pairs in a codebook. Then, based on some criteria, the non-uniqueness of the articulatory trajectories is solved using a dynamic optimization procedure. An articulatory codebook requires a model capable of gen...
متن کاملOn improving the decision algorithm for articulatory codebook search
This paper describes our progress on articulatory voice mimic. The objective is to achieve an articulatory voice mimic system as a basis for low bit-rate speech coding using articulatory codebooks. The articulatory codebook uses a suitable vocal tract model for generating shapes for all possible speech sounds. When building a codebook, unrealistic vocal tract shapes may be generated. In this pa...
متن کاملA low bit rate speech coding method using a formant-articulatory parameter nomogram
In this paper, we propose a new method for low bit rate speech coding using a nomogram that is a pair of codebooks representing the functional relationship between formant frequencies and articulatory parameters. Significant features of our approach are 1) using the codebooks derived theoretically from the computation using a stylized vocal tract model and 2) independent coding by separating fr...
متن کاملA hybrid time-frequency domain articulatory speech synthesizer
High quality speech at low bit rates (e.g., 2400 bits/s) is one of the important objectives of current speech research. As part of long range activity on this problem, we have developed an efficient computer program that will serve as a tool for investigating whether articulatory speech synthesis may achieve this low bit rate. At a sampling frequency of 8 kHz, the most comprehensive version of ...
متن کاملSegmental feature extraction and coding for speech synthesis
This paper describes a segmental feature extraction and speech coding method in an acousticarticulatory domain using nomograms that represent a mapping between formant frequencies and articulatory parameters. The vocal tract model is a modified Fant model, in which we newly introduced a parameter for successively adjusting vocal tract lengths. We investigated first the relationship between form...
متن کامل