A serial connection technique of speakers for multi-channel audio systems

This paper proposes a serial transmission technique of signals for multi-channel audio systems. The technique converts analog audio signals of multiple channels of an audio unit into digital signals, and transfers the digital signals to the speakers through a serial line sequentially. Each speaker is allowed to select its corresponding digital audio signals and to transform the signals into analog audio signals to make sounds for the speaker. The functions of the proposed technique are modeled in VHDL, implemented with FPGA chips, and tested for actual audio systems.