| 摘要 |
A high-sound-quality speech function is implemented in a small-sized wireless terminal including inexpensive low-grade resources such as an inexpensive microprocessor and an inexpensive memory. From data inputted to the terminal, a reproduction data sequence and identifying information defining reproduction timing to reproduce the reproduction data sequence are extracted. According to the identifying information, timing to output the reproduction data sequence to a Digital-to-analog (DA) converter is controlled. A sampling data sequence obtained by converting data inputted to the terminal from analog data to digital data is stored in a register. Depending on a difference between values of the sampling data, whether or not the sampling data is discarded is determined. A sequence of sampling data which is not discarded and which is stored in the register is recorded. Identifying information defining reproduction timing to reproduce the sampling data sequence and reproduction data are created to be outputted.
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