Motorola Corporation

Nader Rizq

Martin Thuo Karanja

Chin Pan Wong

Scott D Gleason

In a communication device, a decoded audio signal is evaluated by a detection function (112). Two portions of the decoded audio signal spectrum are evaluated, a ringback band (206), and the remaining band(s). The signal strength in the ringback band is measured against a preselected ringback energy threshold level and the non-ringback signal strength is measured against a voice energy threshold level. Only if the ringback energy is above the ringback energy threshold level and the non-ringback band energy is below the voice energy threshold level will a ringback filter be applied to the audio signal.

Method and apparatus for reducing false ringback detection

In a mobile communication system (400) where a handover results in a momentary interruption of a signal between the mobile communication device (402) and the fixed network equipment(404, 410), the effect of muted portion (306) of the signal can be reduced by storing a segment (308) of the signal that is received just prior to the occurrence of the handover, and re-using the stored segment by attenuating the segment, playing the segment, and repeating the attenuating and playing (208, 210) until the handover is complete.

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Plantation, FL, United States of America

Nader Rizq