System and method for speaker-phone operation in a communications device

摘要: The invention provides a cellular telephone or other communications device with intelligence to manage speakerphone operation more nearly approximate normal conversation, even when using one-way only transmission mode. microphone path and speaker may be continuously monitored dual voice activity detectors assess the energy characteristics of each channel, switch between one depending on dynamic criteria. In noisy environments, hangtime applied before permitting switching avoid premature dropouts. Other criteria used trigger seizure channel adjusted, such as eliminate lower threshold below which switches out automatically.