首页> 外国专利> APPARATUS FOR EMBEDDING SECRET INFORMATION TO COMPRESSED IMAGE DATA, APPARATUS FOR EXTRACTING THE SECRET INFORMATION, SECRET DATA REWRITING APPARATUS, DECRYPTION APPARATUS, RESTORATION APPARATUS, AND SECRET DATA EMBEDDING CODING APPARATUS

APPARATUS FOR EMBEDDING SECRET INFORMATION TO COMPRESSED IMAGE DATA, APPARATUS FOR EXTRACTING THE SECRET INFORMATION, SECRET DATA REWRITING APPARATUS, DECRYPTION APPARATUS, RESTORATION APPARATUS, AND SECRET DATA EMBEDDING CODING APPARATUS

机译:用于将机密信息嵌入到压缩图像数据中的设备,用于提取机密信息的设备,用于机密数据重写的设备,用于解密的设备,用于还原的设备以及用于将机密数据嵌入到编码设备中

摘要

PPROBLEM TO BE SOLVED: To provide an embedding apparatus of secret information to compressed image data that can efficiently embed secret data to the compressed image data and efficiently detect the secret data and to provide an extraction apparatus for extracting the secret information. PSOLUTION: The embedding apparatus of secret information to compressed image data comprises: a means 14 for partially decoding compressed image data; a quantization conversion coefficient extract means for extracting quantization conversion coefficients from the partially decoded data; a secret data insertion means 11 for embedding secret data 12 to particular null coefficients of the quantization conversion coefficients; and a means 15 for again applying partial coding to the quantization conversion coefficients to which the secret data are embedded. The secret data insertion means 11 utilizes the positional information or the amount of the particular quantization conversion coefficients for the secret data. Or the secret data insertion means 11 utilizes the values and the positions of the particular quantization conversion coefficients. Moreover, the positions of the particular quantization conversion coefficients are determined on the basis of the position of the last non-null conversion coefficient among the conversion coefficients. PCOPYRIGHT: (C)2006,JPO&NCIPI
机译:<要解决的问题:提供一种秘密信息到压缩图像数据的嵌入设备,其可以有效地将秘密数据嵌入到压缩图像数据并有效地检测秘密数据,并且提供一种用于提取秘密信息的提取设备。解决方案:将秘密信息嵌入压缩图像数据的装置包括:装置14,用于部分地解码压缩图像数据;量化转换系数提取装置,用于从部分解码的数据中提取量化转换系数。秘密数据插入装置11,用于将秘密数据12嵌入到量化转换系数的特定零系数中;装置15,用于对嵌入了秘密数据的量化转换系数再次进行部分编码。秘密数据插入装置11将位置信息或特定量化转换系数的量用于秘密数据。或者秘密数据插入装置11利用特定量化转换系数的值和位置。此外,基于转换系数中的最后一个非空转换系数的位置来确定特定量化转换系数的位置。

版权:(C)2006,JPO&NCIPI

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