Speech compensation in dual-mode telephone

摘要: A dual-mode telephone has transmit and receive channels suitable for cellular telephony, is operative in analog digital modes of communication. Each the parallel branches circuitry wherein one branch accommodates voice signals accordance with an protocol second processed by compression expansion circuitry. The circuitry, which employed outgoing signals, incoming constitute a vocoder under control microcontroller unit. Operation during transmission mode introduces digitally quality to received this characteristic being distinguishable from pulse-code modulation communication mode. In order introduce uniformity both communication, includes inserting into channel as speech compensator operated back-to-back arrangement. input output signal formats are identical, but resulting quality. Thereby, present so eliminate disturbance change hand-off between two modes.