公开(公告)号：US09208534B2

公开(公告)日：2015-12-08

申请号：US14271751

申请日：2014-05-07

Applicant: Cisco Technology Inc.

Inventor： Harel Cain ,  Michal Devir

IPC: G06K9/00 ,  G06T1/00 ,  H04N19/467

CPC classification number: G06T1/0092 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0061 ,  H04N1/32144 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32309 ,  H04N19/467 ,  H04N2005/91335

Abstract: In one embodiment, a watermark is embedded in a sequence of video frames, for each one of the video frames, a set of N rectangular patches, two palettes of pixel values in a selected color space, such that the two palettes are denoted as P0 and P1, and P0≠P1, and in each one of the N patches a processor which chooses one of P0 and P1 according to a value of a payload bit to be encoded, a calculator which calculates one of a variance of pixel values in the frame, and edginess for the pixel values in the frame, thereby determining a calculated value, and a processor which determines if the calculated value is beneath a given threshold value, if the calculated value is beneath the given threshold value the processor is operative to calculate a function of the pixel values, the closest value to a result of the calculation of the function in the chosen palette is chosen, and a replacer which replaces the pixel values within the patch with the chosen closest value. Related systems, apparatus and methods are also described.

Abstract translation: 在一个实施例中，将水印嵌入在视频帧序列中，对于每个视频帧，一组N个矩形块，所选色彩空间中的两个像素值调色板，使得两个调色板被表示为P0 P1和P0≠P1，并且在N个补丁中的每一个中，根据要编码的有效载荷比特的值来选择P0和P1之一的处理器，计算器，其计算所述N个补丁中的像素值的方差之一 帧和边缘，用于确定计算的值，以及处理器，其确定计算值是否在给定阈值之下，如果计算的值低于给定阈值，则处理器可操作地计算 选择像素值的函数，与所选择的调色板中的函数的计算结果的最接近的值，以及替换器，其用所选择的最接近的值替换补丁内的像素值。 还描述了相关系统，装置和方法。

公开(公告)号：US09208352B2

公开(公告)日：2015-12-08

申请号：US14176400

申请日：2014-02-10

Applicant: Cisco Technology Inc.

Inventor： Yaron Sella ,  Harel Cain ,  Michal Devir

IPC: G06F21/62 ,  G06F21/64

CPC classification number: G06F21/64 ,  G06F21/10 ,  G06F21/6209 ,  G06T1/005 ,  G06T2201/0063 ,  G09C5/00 ,  H04L9/3226 ,  H04L9/3236

Abstract: In one embodiment, a system including a processor is operative to receive a content item including a watermark encoding a series of data values of an output stream of a linear feedback shift register initialized with a seed including an information element and an assurance value, the shift register having a plurality of states each including a first and second value, identify at least part of the watermark in the content item, extract at least some of the data values from the at least part of the identified watermark, process at least some of the extracted data values yielding the initial state of shift register, and authenticate the first value of the initial state using the second value of the initial state in order to confirm that the first value is indeed the information element included in the seed processed by the shift register.

Abstract translation: 在一个实施例中，包括处理器的系统可操作以接收内容项目，该内容项目包括编码由包括信息元素和保证值的种子初始化的线性反馈移位寄存器的输出流的一系列数据值的水印， 具有多个状态的寄存器，每个状态包括第一和第二值，识别内容项中的水印的至少一部分，从所识别的水印的至少一部分中提取至少一些数据值，处理至少一些 提取的数据值产生移位寄存器的初始状态，并且使用初始状态的第二值来认证初始状态的第一值，以便确认第一值确实是包括在由移位寄存器处理的种子中的信息元素 。

公开(公告)号：US20150324948A1

公开(公告)日：2015-11-12

申请号：US14271751

申请日：2014-05-07

Applicant: Cisco Technology Inc.

Inventor： Harel Cain ,  Michal Devir

IPC: G06T1/00 ,  H04N19/467

CPC classification number: G06T1/0092 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0061 ,  H04N1/32144 ,  H04N1/32208 ,  H04N1/32229 ,  H04N1/32309 ,  H04N19/467 ,  H04N2005/91335

Abstract: In one embodiment, a watermark is embedded in a sequence of video frames, for each one of the video frames, a set of N rectangular patches, two palettes of pixel values in a selected color space, such that the two palettes are denoted as P0 and P1, and P0≠P1, and in each one of the N patches a processor which chooses one of P0 and P1 according to a value of a payload bit to be encoded, a calculator which calculates one of a variance of pixel values in the frame, and edginess for the pixel values in the frame, thereby determining a calculated value, and a processor which determines if the calculated value is beneath a given threshold value, if the calculated value is beneath the given threshold value the processor is operative to calculate a function of the pixel values, the closest value to a result of the calculation of the function in the chosen palette is chosen, and a replacer which replaces the pixel values within the patch with the chosen closest value. Related systems, apparatus and methods are also described.

Abstract translation: 在一个实施例中，将水印嵌入在视频帧序列中，对于每个视频帧，一组N个矩形块，所选色彩空间中的两个像素值调色板，使得两个调色板被表示为P0 P1和P0≠P1，并且在N个补丁中的每一个中，根据要编码的有效载荷比特的值来选择P0和P1之一的处理器，计算器，其计算所述N个补丁中的像素值的方差之一 帧和边缘，用于确定计算的值，以及处理器，其确定计算值是否在给定阈值之下，如果计算的值低于给定阈值，则处理器可操作地计算 选择像素值的函数，与所选择的调色板中的函数的计算结果的最接近的值，以及替换器，其用所选择的最接近的值替换补丁内的像素值。 还描述了相关系统，装置和方法。