Patent ID: 7167561
Filing Date: 2007-01-23
Classification: G06F,G11B,G11C

Abstract:
1. A reproducing apparatus for reproducing data in which a digital signal, to which a fixed value is added at a predetermined timing to blocks of main data, is compressed and encrypted from a recording medium, comprising: decrypting means for decrypting the compressed and encrypted digital signal; separating means for separating the fixed value and the compressed data from the digital signal that are decrypted by said decrypting means; decompressing means for decompressing the compressed main data separated by said separating means; memory means for pre-storing a fixed value; comparing means for comparing the fixed value separated by said separating means with the fixed value stored in said memory means; and controlling means for permitting and prohibiting the decompressing of said main data based upon the compared result of said comparing means.