| 摘要 |
<p>A high efficiency encoding method comprising the steps of: compressing, in a non-linear fashion, data obtained by dividing (612a) input audio signals into blocks and transforming (612b) the data into data on the frequency axis so as to find (612c) data on the frequency axis as the M-dimensional vector; and processing the data on the frequency axis of the M-dimensional vector with vector quantization. An inter-block difference of data to be quantized may be taken and processed with vector quantization. In this manner, by non-linearly compressing the data on the frequency axis and processing the data with vector quantization, the quality of quantization can be improved. Also, by taking the inter-block difference, the compression ratio can be increased further.</p> |
