Transcoding and transdecoding unit, and method for adjusting the output thereof

摘要

PCT No. PCT/FI94/00414 Sec. 371 Date May 19, 1995 Sec. 102(e) Date May 19, 1995 PCT Filed Sep. 19, 1994 PCT Pub. No. WO95/08877 PCT Pub. Date Mar. 30, 1995A transcoding and transdecoding unit in a digital mobile radio system, and methods for adjusting their output signals. The unit includes an expander for converting companded digital data into a linear signal; a speech encoder for coding a linearized signal into encoded form; and an amplifier for amplifying the expanded signal. In order that the outbound audio signal not suffer interference due to the raised level, the transcoding unit further includes a level monitor for monitoring the amplitude of the linearized signal and for controlling amplifier such that the signal produced by the amplifier is of a desired level.