| 摘要 |
PURPOSE:To reduce a time until wave shape data are obtained by memorizing sequential wave shape sample data for a memory means and commonly using the memorized plural wave shape sample data in operation of both a linear predication method and a linear interpolation method. CONSTITUTION:Plural data which are input time sequentially are memorized by a memory means 100, a recovery means performs prescribed operation, based on a linear predication method, by using differential data and plural data memorized in the memory means 100, to recover data before compression by means of linear predication method, and the recovered data are input sequentially in the memory means 100. A linear interpolation means 110 performs the interpolation operation to the plural data memorized in the memory means 100 to introduce wave shape sample data corresponding to a prescribed phase value. Accordingly, capacity of a wave shape memory is decreased by using the linear predication method and the linear interpolation method, a memory region can be made effective and wave shape data can be obtained in high speed. |
