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热词
    • 1. 发明授权
    • Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon
    • 用于嵌入和提取数字信息的装置和方法以及具有用于执行记录在其上的方法的程序的介质
    • US06477276B1
    • 2002-11-05
    • US09186375
    • 1998-11-05
    • Hisashi InoueShiro IwasakiMikio ShimazuShuichi OjimaTakashi KatsuraAkio MiyazakiEiichi Hatae
    • Hisashi InoueShiro IwasakiMikio ShimazuShuichi OjimaTakashi KatsuraAkio MiyazakiEiichi Hatae
    • G06K936
    • H04N19/645G06T1/005G06T2201/0051G06T2201/0052G06T2201/0061G06T2201/0065H04N1/32154H04N1/3216H04N1/32165H04N1/3217H04N1/32176H04N1/32187H04N1/32277H04N2201/3233H04N2201/327
    • An apparatus for embedding information in a signal includes a band dividing device, a block divider, a quantization portion, a signal replacement portion, a mean difference addition portion, a mean calculation portion, and a band synthesis portion. The band dividing device divides the signal into transform coefficients over a plurality of frequency bands. The block divider divides one frequency band into a plurality of blocks in accordance with a previously determined block size. The quantization portion calculates for each block, a mean value M of the transform coefficients in the block, and subjects the mean value M to linear quantization, using a previously determined quantization step-size Q to calculate a quantization value. The signal replacement portion replaces the quantization value for each block, on the basis of the quantization value and the value of the information to be embedded. The mean difference addition portion subjects the replaced quantization value, for each block, to inverse linear quantization using the quantization step-size Q to calculate a mean value M′, and adds a difference DM between the mean value M′ and the mean value M to all the transform coefficients in the block. The mean calculation portion calculates a mean value LM of the transform coefficients in the frequency band after the addition of the difference DM. The band synthesis portion reconstructs a signal in which the information has been embedded using the frequency band after the addition of the difference DM and the other frequency bands.
    • 用于在信号中嵌入信息的装置包括带分割装置,块分割器,量化部分,信号替换部分,平均差加法部分,平均计算部分和频带合成部分。 频带划分装置将信号划分成多个频带的变换系数。 块分割器根据先前确定的块大小将一个频带划分成多个块。 量化部分针对每个块计算块中的变换系数的平均值M,并使用预先确定的量化步长Q对平均值M进行线性量化,以计算量化值。 信号替换部分基于量化值和要嵌入的信息的值替换每个块的量化值。 平均差分加法部分使用量化步长Q对每个块对替换的量化值进行逆线性量化,以计算平均值M',并将平均值M'和平均值M 到块中的所有变换系数。 平均计算部分计算差DM之后的频带中的变换系数的平均值LM。 频带合成部分在添加差分DM和其他频带之后,使用频带重建信息已被嵌入的信号。
    • 8. 发明授权
    • Recording apparatus and recording method
    • 记录装置和记录方法
    • US07676141B2
    • 2010-03-09
    • US10712372
    • 2003-11-14
    • Shiro IwasakiYoshiho Gotoh
    • Shiro IwasakiYoshiho Gotoh
    • H04N7/00
    • G11B27/3027G11B19/04G11B20/18G11B20/1866G11B27/034G11B27/329G11B27/36G11B2220/2541G11B2220/2562
    • An apparatus and method for addressing data losses when power to a digital recorder is unexpectedly interrupted during recording, and a the file management information needed to play back digital content is not completely written to a disc. The recovery process for correcting inconsistencies between the AV data and management information left on the disc is time-consuming. By recording the recovery data used for the data recovery process when power is turned on again, the management information can be recompiled based on the recovery data. Thus, inconsistencies between the AV data and management information can be corrected. Additionally, AV data and recovery data in this case can be written alternately to contiguous areas on the disc.
    • 用于在记录期间意外地中断数字记录器的电源时用于解决数据丢失的装置和方法,并且回放数字内容所需的文件管理信息未被完全写入盘中。 用于校正AV数据和留在盘上的管理信息之间的不一致性的恢复过程是耗时的。 通过记录在再次接通电源时用于数据恢复过程的恢复数据,可以基于恢复数据重新编译管理信息。 因此,可以校正AV数据和管理信息之间的不一致性。 此外,这种情况下的AV数据和恢复数据可以交替写入盘上的连续区域。