| 摘要 |
Inputted audio signals are compressed and encoded by a speech encoder (3), sent to an RF transmission processor (4), subjected to channel encoding, modulation and transmission processing, and transmitted through an antenna (11). Signals received by the antenna (11) are subjected to reception processing, demodulation and channel decoding by an RF reception processor (5), and expanded and decoded by a speech decoder (6). A recording/reproduction controller (8) controls the writing of the signals from the speech encoder (3) into a semiconductor memory (7) and the readout of the signals from the memory (7) to the speech decoder (6). Therefore, the memory (7) can be efficiently utilized for two-way/one-way communication without increasing the circuit constitution. <IMAGE> |
