METHOD FOR IMPROVING THE QUALITY OF SOUND USING DUAL CODEC OF SUBSCRIBER BASED RING-BACK-TONE SERVICE

摘要

invention called subscriber is registered with a specific ringback tone to the calling party alternative to sending a case, the original - provides a quality improvement method using a dual codec of a subscriber-based RBT service by setting the appropriate codecs that allow to improve the quality of a subscriber-based RBT the way (One-Way). To this end, the present invention is a subscriber-based ring in a mobile communication system which provides the calling party mobile terminal is the called mobile communication terminal as the call origination attempt to the called party has set a ringback tone to the calling party a particular mobile communication terminal replaces negative Method according to one hundred tons service, the calling mobile communication terminal attempts a call origination for the calling party to the called mobile communication terminal a call connection request to the mobile exchange called mobile communication exchanger made in the ground, for the destination base station controller phase such that channel encoding is released and, by the circle of the ring back tone RBT sound source data from the source server, the subscriber set of the destination mobile terminal by the base station controller-the-way transmission is suitably coding the calling mobile communication phase to be sent to the terminal and, the call connection to the called mobile communication terminal is made, the destination is the base station controller switches to channel coding state is characterized by consisting of the steps of such a voice call is initiated.