| 摘要 |
IN PRODUCING FROM AN ORIGINAL SPEECH SIGNAL A PLURALITY OF PARAMETERS FROM WHICH AN APPROXIMATION OF THE ORIGINAL SPEECH SIGNAL CAN BE RECONSTRUCTED, A FURTHER SIGNAL IS GENERATED IN RESPONSE TO THE ORIGINAL SPEECH SIGNAL, WHICH FURTHER SIGNAL IS INTENDED TO REPRESENT THE ORIGINALSPEECH SIGNAL. AT LEAST ONE OF THE PARAMETERS (DWE) IS DETERMINED USING FIRST AND SECOND DIFFERENCES BETWEEN THE ORIGINAL SPEECH SIGNAL AND THE FURTHER SIGNAL. THE FIRST DIFFERENCE (DW) IS A DIFFERENCE BETWEEN A WAVEFORM ASSOCIATED WITH THE ORIGINAL SPEECH SIGNAL AND A WAVEFORM ASSOCIATED WITH THE FURTHER SIGNAL, AND THE SECOND DIFFERENCE (DE) IS A DIFFERENCE BETWEEN AN ENERGY PARAMETER DERIVED FROM THE ORIGINAL SPEECH SIGNAL AND A CORRESPONDING ENERGY PARAMETER ASSOCIATED WITH THE FURTHER SIGNAL.FIGURE 5
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