Patent ID: 7046809
Filing Date: 2006-05-16
Classification: H04B,H04K

Abstract:
1. In a voice/data vocoding device for a mobile communication system, a device for scrambling voice and data in the mobile communication system comprising: a controller for generating an operational mode control signal to control an operational mode of the voice and data, a scrambling key feeding control signal to control data scrambling, and a sync signal generation control signal; an operational mode processor for vocoding or bypassing a voice/data packet received from a radio channel interval, based on the operational mode control signal of the controller, wherein the operational mode processor outputs an unscrambled vocoded PCM (pulse code modulation) signal or an unscrambled bypassed voice/data packet signal; a random number generator for generating a random number based on the scrambling key feeding control signal of the controller; a sync signal transmitter for generating a sync signal based on the sync signal generation control signal of the controller, and sending the generated sync signal to a cable channel interval; and a scrambler for scrambling the unscrambled vocoded PCM signal or the unscrambled bypassed voice/data packet of the operational mode processor using the random number generated from the random number generator and, after complete transmission of the sync signal, sending the scrambled PCM signal or voice/data packet to the cable channel interval.