| 摘要 |
PROBLEM TO BE SOLVED: To support operations of various audio apparatuses by one audio jack. SOLUTION: The audio input/output apparatus uses the four-pole type audio jack 20, provides earphone microphone functions (one microphone input and one speaker output) having conventionally been existing to three-pole signal parts including a ground part, assigns a function of a microphone input for audio recognition under high noise environment to a part equivalent to the fourth pole, and validates the function in response to the necessity of an audio apparatus to be connected. COPYRIGHT: (C)2007,JPO&INPIT |
