公开(公告)号：US20050180571A1

公开(公告)日：2005-08-18

申请号：US11103867

申请日：2005-04-12

Applicant: Tzu-Chieh Chang ,  Schuyler Quackenbush ,  James Snyder

Inventor： Tzu-Chieh Chang ,  Schuyler Quackenbush ,  James Snyder

IPC: H03M7/30 ,  H03M7/40 ,  H04L9/00 ,  H04K1/00

CPC classification number: H03M7/30 ,  H03M7/40 ,  H04L9/0819 ,  H04L9/0861 ,  H04L2209/30 ,  H04N21/2347 ,  H04N21/4405

Abstract: This invention provides methods and apparatus for protecting data transmitted using standard compression techniques such as Huffman coding. After input data is preprocessed (filtered, quantized, etc.), the data is encoded using a Huffman coder based on Huffman codes or code books which have been scrambled to change the order of the code books and/or codes from established standard Huffman code books and/or codes. When the transmitted information is received by a Huffman code receiver, the received data may be decoded using the scrambled Huffman code book/codes to obtain the data that was transmitted by the transmitter.

公开(公告)号：US06885749B1

公开(公告)日：2005-04-26

申请号：US09476463

申请日：1999-12-30

Applicant: Tzu-Chieh Chang ,  Schuyler Reynier Quackenbush ,  James H Snyder

Inventor： Tzu-Chieh Chang ,  Schuyler Reynier Quackenbush ,  James H Snyder

IPC: H03M7/30 ,  H03M7/40 ,  H04L9/00 ,  H04K1/00 ,  G06F7/00 ,  H04N7/167

CPC classification number: H03M7/30 ,  H03M7/40 ,  H04L9/0819 ,  H04L9/0861 ,  H04L2209/30 ,  H04N21/2347 ,  H04N21/4405

Abstract: This invention provides methods and apparatus for protecting data transmitted using standard compression techniques such as Huffman coding. After input data is preprocessed (filtered, quantized, etc.), the data is encoded using a Huffman coder based on Huffman codes or code books which have been scrambled to change the order of the code books and/or codes from established standard Huffman code books and/or codes. When the transmitted information is received by a Huffman code receiver, the received data may be decoded using the scrambled Huffman code book/codes to obtain the data that was transmitted by the transmitter.

Abstract translation: 本发明提供了用于保护使用诸如霍夫曼编码的标准压缩技术发送的数据的方法和装置。 在对输入数据进行预处理（过滤，量化等）之后，使用基于霍夫曼代码或代码簿的霍夫曼编码器对数据进行编码，这些书籍已被加扰以便从已建立的标准霍夫曼代码改变码本和/或代码的顺序 书籍和/或代码。 当发送的信息被霍夫曼码接收机接收时，可以使用加扰的霍夫曼代码簿/码对接收到的数据进行解码，以获得由发送器发送的数据。