Abstract: The present invention discloses a voice signal synthesizing method and device, wherein voice signals are sampled at a relatively lower sampling frequency. During the reproduction of the signals, interpolation is used to calculate values of voice signals between two sampled periods and the calculated values are filled between the two sampled periods, whereby lower distortion rate may be obtained in the reproduced voice. This invention provides a low distortion rate and low sampling frequency voice signal synthesizing method and device.

Abstract: Communication between a personal computer and an electronic organizer is conducted through the audio input port and the audio output port of the personal computer. The communication interface device of this invention comprises: an output line to be connected with an electronic organizer and the audio input port of the personal computer; an input line to be connected with an electronic organizer and the audio output port of the personal computer; a voltage regulator to regulate voltages of said output line and said input line; and a voltage detector to detect voltage of the audio output port of the personal computer and the input port of the personal computer. The interface device generates control signals to the personal computer and the electronic organizer to enable the communication therebetween when both are ready to communicate.

Abstract: A simplified decoder for a decoder for 2-dimensional input devices with less number of pads is disclosed. Two pads are used to represent the addresses in one dimension of the input means in the 2-dimensional input device. Two capacitors are charged through a number of resistors, which number is decided by the number of addresses of said dimension. The time difference in charging the capacitors is measured to determine the address of an actuated input means in said dimension.