Abstract: A voice signal processing apparatus and a voice signal processing method are provided. Each frequency-lowered signal window included in a frequency-lowered sampling voice signal is divided into a first sub signal window that is faded-in and a second sub signal window that is faded-out. The first sub signal window and the second sub signal window that are adjacent to each other and belong to the different frequency-lowered signal windows are overlapped in order to generate an overlapping voice signal. The overlapping voice signal and the sampling voice signal are combined to generate an output signal.

Abstract: In a device including a headset jack having an external microphone contact, and an external microphone signal path connected to the external microphone contact, a method including detecting whether a headset plug is plugged into the headset jack and, if the headset plug is detected, selecting an audio signal received from the external microphone signal path, recording the selected audio signal, to produce a recorded audio signal, and determining if an external microphone is connected to the external microphone contact based on the recorded audio signal.

Abstract: An electronic device includes a microphone, a bias-supply device and a voice-recognition device. The bias-supply device is configured to provide a first bias voltage to serve as an operation voltage of the microphone, when the electronic device is operated in a power-saving mode, such that the microphone transforms a voice signal into a first output signal. The voice-recognition device is configured to receive the first output signal and output a control signal, when the first output signal has a predetermined signal, to enable the electronic device be operated in a normal operation mode and the bias-supply device to provide a second bias voltage that is higher than the first bias voltage to serve as the operation voltage of the microphone, such that the microphone transforms the voice signal into a second output signal and outputs the second signal to a core circuit.

Abstract: In a device including a headset jack having an external microphone contact, and an external microphone signal path connected to the external microphone contact, a method including detecting whether a headset plug is plugged into the headset jack and, if the headset plug is detected, selecting an audio signal received from the external microphone signal path, recording the selected audio signal, to produce a recorded audio signal, and determining if an external microphone is connected to the external microphone contact based on the recorded audio signal.