Coding compression apparatus and method for multimedia data

The invention coding must use a cryptographic key used in the process of compression to allow for decoding multimedia data encryption compression method compresses and converts the multimedia data through a predetermined encryption key in the process of compression for recording and transmitting multimedia data and to the start of the device. Encrypted multimedia data compression method according to the invention by applying the multimedia data input to the DCT and generating a DCT coefficient, and quantizes the DCT coefficients generated; When entropy encoding the DC and AC coefficients of the quantized DCT encrypting and converts the encoded result of the conversion of DC and AC coefficients in accordance with a predetermined encryption key; The encrypted DC and AC coefficient as comprising the step of outputting the Huffman encoding using the Huffman table, and this provides a compression method suitable for processing multimedia data in the wireless communication through.