公开(公告)号：EP2495965A2

公开(公告)日：2012-09-05

申请号：EP10827076.0

申请日：2010-10-27

Applicant: LG Electronics Inc.

Inventor： HWANG, Ingu ,  SHIN, Sungwook ,  KIM, Jongchan ,  OH, Seungkyun ,  IM, Jinseok ,  LIM, Jungeun

IPC: H04N5/913

Abstract: Provided are a device and method for detecting watermarks in content carrying watermarks. One method for watermark detection according to the present invention comprises the steps of: extracting the label of a frequency component of the content; generating a bit sequence by making bit values correspond on the basis of changes in the label being extracted; checking correlation while shifting the phase of the band-spreading code (pn sequence) with respect to the generated bit sequence; and checking the amount of phase shift in the band-spreading code at times when the correlation checked in this way falls into the category of autocorrelation, and then determining a bit group having a value corresponding to the amount of phase shift checked in this manner. The bit group determined in this way constitutes part of watermark data.

Abstract translation: 提供的是用于检测在内容载水痕水印的装置和方法。 水印检测gemäß在本发明的一种方法包括以下步骤：提取所述内容的频率分量的标签; 通过使位值对应于被提取的标签的改变的基础上产生一个比特序列; 检查相关性，同时相对于所生成的比特序列移位频带扩展码（PN序列）的相位; 并且有时检查所述频带扩展码的相移的量当以这种方式检查的相关性落入自相关的类别，然后确定性采矿具有值对应于相移以这种方式检查量的比特组。 以这种方式开采的比特组确定性构成水印数据的一部分。

公开(公告)号：EP2495965B1

公开(公告)日：2020-04-15

申请号：EP10827076.0

申请日：2010-10-27

Applicant: LG Electronics Inc.

Inventor： HWANG, Ingu ,  SHIN, Sungwook ,  KIM, Jongchan ,  OH, Seungkyun ,  IM, Jinseok ,  LIM, Jungeun

IPC: H04N5/913 ,  G06T1/00 ,  H04N21/254 ,  H04N21/44 ,  H04N21/835 ,  H04N21/8358