| 摘要 |
<p>For data to be compressed and having periodicity, two windows of identical size are set for two intervals in accordance with peaks appearing almost periodically and sample data is alternately rearranged between the windows of the identical size, thereby replacing the frequency of data having periodicity with approximately a half frequency without deteriorating reproducibility into original data, so that the replaced data of a low frequency is subjected to compression. This rearrangement processing may be applied to a compression having a characteristic that the compression ratio cannot be increased in a high frequency region, so as to increase the compression ratio without deteriorating the quality of the reproduced data obtained by decompression.</p> |
