Abstract: Disclosed is a method for controlling an outgoing call. The method for controlling an outgoing call in a mobile phone according to one aspect of the present invention comprises: a step of analyzing an audio signal input from an external source through a microphone for a predetermined time in accordance with preset criteria when an outgoing call gets connected; and a step of determining whether the outgoing call is normal or abnormal based on the result of the audio signal analysis. The method for controlling an outgoing call according to the present invention may disconnect a call in a short time when an outgoing call is unintentionally or erroneously conducted, to thereby prevent a wasted call charge, and may deliver a message indicating such an erroneous call to a caller so that the caller may recognize the erroneous call, to thereby minimize inconvenience of the caller.

Abstract: The present invention relates to a pilot tone generating method and apparatus of an orthogonal frequency division multiple access system and method, and a channel estimation method and apparatus using the same. The channel estimation apparatus includes a pilot tone extracting unit for extracting a pilot tone, which is inserted within a frame with data tone, masked with an orthogonal code; a pilot tone unmasking unit for unmasking of the pilot tone extracted from the pilot tone extracting unit by using an orthogonal code information; and a channel estimation operating unit for estimating a channel by calculating an average of the pilot tones which is unmasked in the unmasking unit.

Abstract: An input device and display apparatus with multi-light segments has been disclosed. The input device may comprise a rigid light guide layer having alignment structures that define the rigid light guide layer into multiple light segments, a plurality of first layer flexible light guide films and a plurality of second layer flexible light guide films. The alignment structures may be formed together when making the rigid light guide layer in an injection molding process. By coupling multiple light sources into each of the light guides, the display may be configured to display multiple color and multiple symbols, independently. In another embodiment, the light guide may be utilized in a display apparatus without a LCD.