Abstract: A method and an apparatus perform Mobile High-definition Link (MHL) signal filtering. The method of performing the Mobile High-definition Link (MHL) signal filtering in a terminal includes determining whether a transmission device for MHL signal transmission is connected; determining whether a call continues when the transmission device is connected; and determining whether to perform the MHL signal filtering in the terminal based on whether the call continues. Accordingly, there is an advantage of improving picture quality of an image output from a multimedia device by effectively removing a common mode noise even when an RF weak electric field is formed due to call generation.

Abstract: A method and an apparatus perform Mobile High-definition Link (MHL) signal filtering. The method of performing the Mobile High-definition Link (MHL) signal filtering in a terminal includes determining whether a transmission device for MHL signal transmission is connected; determining whether a call continues when the transmission device is connected; and determining whether to perform the MHL signal filtering in the terminal based on whether the call continues. Accordingly, there is an advantage of improving picture quality of an image output from a multimedia device by effectively removing a common mode noise even when an RF weak electric field is formed due to call generation.

Abstract: The present invention provides a recording/playback circuit able to record voice or sound. The device is installed in the inside of a cylindrical case in which a speaker and a recording microphone are installed on the lower surface thereof. A press button-type switch is installed on an upper surface of the case and used as a playback button when a bottle is fitted in the inside of the cylindrical case and the press button type playback button turns on. Audio signals stored in a memory element are played back and necessary information is recorded by a recording button installed at the lower section. In particular, the cylindrical case is formed so as to accommodate the lower part of the bottle in use.