METHOD FOR PROCESSING AUDIO DATA, REALIZED BY ENABLING A TRANSMITTING SIDE TO ENCIPHER AUDIO SIGNALS IN A METHOD OF CHANGING AREAS OF AUDIO DATA IN PREDETERMINED ORDER, AND ENABLING A RECEIVING SIDE TO DECIPHER THE ENCIPHERED AUDIO DATA BY RECEIVING DECODING INFORMATION FROM A SMART CARD

摘要

PURPOSE: A method for processing audio data, particularly in relation to that a transmitting side enciphers audio signals in a method of changing areas of audio data in predetermined order, and a receiving side deciphers the enciphered audio data by receiving decoding information from a smart card is provided to simply constitute a descrambler and decoding information, and obtaining a perfect scrambling effect. CONSTITUTION: If a program to be currently broadcasted is a paid program, audio data are enciphered by changing areas of audio data in predetermined order, and the enciphered audio data are transmitted. If a program currently received is a paid program, a descrambler receives decoding information from a smart card preliminarily purchased to decipher the enciphered audio data of the paid program(S81-S85). The descrambler transmits the deciphered audio data to a microcomputer, and the microcomputer reconstitutes an audio frame to be output to an audio decoder(S86-87).