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AUDIO CODE METHOD BASED ON MULTI-BAND EXITATED MODEL
AUDIO CODE METHOD BASED ON MULTI-BAND EXITATED MODEL
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机译:基于多频带激励模型的音频编码方法
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摘要
In the speech coding method, the voiced sound component and the unvoiced sound component can be mixed in all frequency bands to provide high quality voice service. The weighting of the voiced excitation signal spectrum V (n) and the unvoiced excitation signal spectrum U (n) Modeling the sum to predict the excitation signal spectrum E (n), and Predicted spectral envelope And generating a synthesized sound spectrum by estimating the synthesized sound spectrum, and estimating a function p (n) representing a mixing ratio in the frequency domain by using an analysis method or an analysis synthesis method. We propose a MMBE speech model that allows the mixing of voiced and unvoiced components in all frequency domains, and the application of synthesis methods and simple assumptions to estimate the model parameters by minimizing the RMS error between the original and synthesized speech spectra. In this paper, the frequency domain mixing ratio was estimated without comparing with the threshold through an analytical synthesis method that estimates the model parameters with much less computation amount than the synthesis method.
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