| 摘要 |
PURPOSE:To transmit each data of voice and control on the same radio channel without relation mutually, by adding the data with a sound synchronizing signal at each prescribed time at the sound transmission and a control synchronizing signal at the control data transmission respectively for transmitting signals. CONSTITUTION:A voice is applied with A/D conversion 1 in a coding speed determined for a radiotelephony system and stored 21 at the transmission of data between opposing radio sets, the coded voice is sectioned at each prescribed time, read out at a speed faster than the coding speed, a voice synchronizing signal is added to a space time produced at each prescribed time with the difference between the coding speed and the transmission speed, and the voice synchronizing signal is added at the same speed as the transmission speed at the transmission of control data for transmtting respectively signals. On the other hand, each data of voice and control is sectioned based on two kinds of synchronizing signals at the reception and the control data is transmitted to a control section 23 and the voice data is transmitted to a storage circuit 22. Further, the stored voice data is read out in the coding speed and D/A-converted 22. |
