Scramble apparatus and descramble apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsNoboru Katta, Hiroki Murakami, Susumu Ibaraki, Seiji Nakamura, Toshihide Akiyama, Hiroshi Takeno
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Abstract
A scramble apparatus for scrambling data including a variable length code and a descramble apparatus is for descrambling a scrambled signal, and a scramble transmission apparatus comprising the scramble apparatus and the descramble apparatus. A specific code of data is converted into a readable code having a length equal to that of an original code.
Claims24
A scramble transmission apparatus comprising a scramble apparatus for scrambling original data including original variable length codes and a descramble apparatus for restoring a scramble signal generated by the scramble apparatus to a signal not scrambled, wherein the scrambled apparatus comprises a conversion device for converting at least one of the original variable length codes into readable codes each having a length which is equal to that of a corresponding original variable length code and having a value which is different from that of the corresponding original variable length code and wherein the descramble apparatus performs a conversion which is inverse to the conversion performed by the scramble apparatus.
A scramble apparatus comprising a selecting device for selecting at least one original code from among codes of data including variable length codes and a conversion device for converting each of the selected codes into a readable code having a length which is equal to that of a corresponding original code and having a value which is different from that of the corresponding original code.
A descramble apparatus for descrambling inputted scrambled data obtained by converting original codes of data including variable length codes into readable codes each having a length which is equal to that of a corresponding original code and having a value which is different from that of the corresponding original code, said apparatus comprising a selecting device for selecting the readable codes which have been converted from the original codes, and an inverse conversion device for inversely converting the readable codes selected by the selecting device to the original codes.
A descramble apparatus comprising a descramble decoding device which includes means for receiving a scramble signal obtained by converting original codes of original data including variable length codes into different codes each having a length which is equal to that of a corresponding original code and having a value which is different from that of the corresponding original code, and a descramble decoding device for executing a descramble processing and decoding processing of the received scramble signal.
Dependencies are inferred from the claim text.