Patent ID: 7720223
Filing Date: 2010-05-18
Classification: G11B,H04N

Abstract:
1. A system for managing copying of contents to external equipment, said system comprising: a first reader operable to read in contents to be copied; a second reader operable to read in identification information of said contents; a database operable to store copy information regarding whether copying is permissible for each of said contents; an electronic watermark inspecting unit operable to inspect electronic watermarks inserted into said contents and to produce inspection results; an orthogonal conversion unit operable to perform orthogonal conversion of said contents to produce converted contents; an encoding compression unit operable to subject said converted contents to quantization and Huffman encoding to produce encoded and compressed contents; an enciphering unit operable to encipher said encoded and compressed contents to produce enciphered contents; a collation unit operable to receive said identification information and an orthogonal conversion value of said contents or a hash value of said contents, to search said database based on at least one of said identification information and an orthogonal conversion value of said contents or a hash value of said contents to determine whether a matching record exists in said database, and to create a collation result indicating whether a matching record exists for said database; and a controller operable to control copying of said enciphered contents to the external equipment; wherein in the event said collation result indicates a matching record exists, said controller controls copying of said enciphered contents according to the content of said matching record, and in the event said collation result indicates a matching record does not exist, said controller controls copying of said enciphered contents according to said inspection results.