| 摘要 |
PURPOSE: A vector quantization searching method in voice recognition is provided to reduce a period of time required for calculations in a quantization process so as to process voice recognition in real time. CONSTITUTION: The quantized codeword of the first frame of an input voice is compared with the entire codewords of a codebook, to select the codeword having the minimum distance. The codeword of the previous frame is compared with the input of the next frame to obtain a distance. When the distance is larger than the sum of an average distance and a variance distance, the codeword of the input is compared with the entire codewords. When the distance is not larger, the codeword is compared only with a selected codeword corresponding to the previous frame codeword, to obtain a quantization codeword. The aforementioned process is repeated for the overall voice section to acquire quantization codewords.
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