METHOD AND APPARATUS FOR TRANSMITTING CODED AUDIO SIGNALS THROUGH A TRANSMISSION CHANNEL WITH LIMITED BANDWIDTH

摘要

A digital audio transmitter system (10) capable of transmitting high quality, wideband speech over a transmission channel with a limited bandwidth such as a traditional telephone line (16). The digital audio transmitter system (10) includes a coder (32) for coding an input audio signal to a digital signal having a transmission rate that does not exceed the maximum allowable transmission rate for traditional telephone lines and a decoder (40) for decoding the digital signal to provide an output audio signal with an audio bandwidth of wideband speech. A coder (32) and a decoder (40) may be provided in a single device (12) to allow two-way communication between multiple devices.