公开(公告)号：US20130194507A1

公开(公告)日：2013-08-01

申请号：US13800249

申请日：2013-03-13

申请人： Venugopal Srinivasan ,  John C. Peiffer

发明人： Venugopal Srinivasan ,  John C. Peiffer

IPC分类号： H04N5/265

CPC分类号： H04N5/265 ,  G10L19/008 ,  G10L19/032 ,  G10L19/173 ,  G11B20/00007 ,  G11B20/10527 ,  G11B27/034 ,  G11B2020/00028 ,  G11B2020/00036 ,  G11B2020/10546

摘要： Methods, apparatus and articles of manufacture for mixing compressed digital bit streams are disclosed. An example method disclosed herein comprises acquiring a frame associated with a first compressed digital bit stream, unpacking the frame to obtain a plurality of original transform coefficient sets, and modifying the plurality of original transform coefficient sets to mix a second digital bit stream with the first compressed digital bit stream.

摘要翻译： 公开了用于混合压缩数字比特流的方法，装置和制品。 本文公开的示例性方法包括获取与第一压缩数字比特流相关联的帧，解包所述帧以获得多个原始变换系数集合，以及修改所述多个原始变换系数集合以将第二数字比特流与所述第一数字比特流混合 压缩数字位流。

公开(公告)号：US08359205B2

公开(公告)日：2013-01-22

申请号：US12551220

申请日：2009-08-31

申请人： Venugopal Srinivasan ,  Alexander Topchy

发明人： Venugopal Srinivasan ,  Alexander Topchy

IPC分类号： G10L19/00

CPC分类号： G06F17/30743 ,  G11B20/10 ,  H04H20/31 ,  H04H60/37 ,  H04H60/58 ,  H04H2201/50

摘要： Methods and apparatus to audio watermarking and watermark detection and extracted are described herein. An example method includes receiving a media content signal, sampling the media content signal to generate samples, storing the samples in a buffer, determining a first sequence of samples in the buffer, determining a second sequence of samples in the buffer, wherein the second sequence of samples is of substantially equal length as the first sequence of samples, calculating an average of the first sequence of samples and the second sequence of samples to generate an average sequence of samples, extracting an identifier from the average sequence of samples, and storing the identifier in a tangible memory.

摘要翻译： 本文描述了音频水印和​​水印检测和提取的方法和装置。 示例性方法包括：接收媒体内容信号，对媒体内容信号进行采样以产生样本，将样本存储在缓冲器中，确定缓冲器中的第一采样序列，确定缓冲器中的第二采样序列，其中第二序列 的样本具有与第一样本序列基本相同的长度，计算第一样本序列的平均值和第二样本序列以生成平均样本序列，从平均样本序列中提取标识符，并存储 标识符在有形存储器中。

公开(公告)号：US20110264455A1

公开(公告)日：2011-10-27

申请号：US12767422

申请日：2010-04-26

申请人： Daniel J. Nelson ,  Venugopal Srinivasan ,  John C. Peiffer

发明人： Daniel J. Nelson ,  Venugopal Srinivasan ,  John C. Peiffer

IPC分类号： G10L19/00

CPC分类号： G10L19/018 ,  H04H20/14 ,  H04H60/31 ,  H04H60/58 ,  H04H2201/50 ,  H04N21/23892 ,  H04N21/4394

摘要： Example methods, apparatus and articles of manufacture to perform audio watermark decoding are disclosed. A disclosed example method includes receiving an audio signal including an audience measurement code embedded therein using a first plurality of frequency components, sampling the audio signal, transforming the sampled audio signal into a first frequency domain representation, determining whether the code is detectable in the first plurality of frequency components of the first frequency domain representation, and when the code is not detected in the first plurality of frequency components, examining a second plurality of frequency components of a second frequency domain representation to determine whether the code is detected, the second plurality of frequency components being offset from the first plurality of frequency components by a first offset, the first offset corresponding to a sampling frequency mismatch.

摘要翻译： 公开了用于执行音频水印解码的示例性方法，装置和制造。 所公开的示例性方法包括使用第一多个频率分量接收包括其中嵌入的观众测量码的音频信号，对音频信号进行采样，将采样的音频信号变换为第一频域表示，确定代码是否可在第一 第一频域表示的多个频率分量，以及当在第一多个频率分量中未检测到代码时，检查第二频域表示的第二多个频率分量以确定是否检测到代码，第二多个 频率分量从第一多个频率分量偏移第一偏移，第一偏移对应于采样频率失配。

公开(公告)号：US07783889B2

公开(公告)日：2010-08-24

申请号：US11676452

申请日：2007-02-19

申请人： Venugopal Srinivasan

发明人： Venugopal Srinivasan

IPC分类号： H04L9/00

CPC分类号： H04N7/173 ,  H04L9/3247 ,  H04L2209/601 ,  H04L2209/80 ,  H04N21/44222 ,  H04N21/44236 ,  H04N21/4667 ,  H04N21/835 ,  H04N21/84

摘要： Methods, apparatus, and articles of manufacture for media monitoring are disclosed. In particular, the example methods, apparatus, and articles of manufacture generate digital spectral signatures for use in identifying media information. Initially, a frame of media samples is obtained. A first frequency component having a first spectral power and a second frequency component having a second spectral power are identified by performing a spectral transform operation on the frame of media samples. A descriptor of the first frame of media samples is determined based on a comparison of the first spectral power and the second spectral power. A first signature is then generated based on the descriptor.

摘要翻译： 公开了用于媒体监测的方法，装置和制品。 具体地，示例性方法，装置和制品生成用于识别媒体信息的数字频谱签名。 最初，获得一帧媒体样本。 具有第一频谱功率的第一频率分量和具有第二频谱功率的第二频率分量通过对媒体样本的帧执行频谱变换操作来识别。 基于第一光谱功率和第二光谱功率的比较来确定媒体样本的第一帧的描述符。 然后基于描述符生成第一签名。

公开(公告)号：US20100195837A1

公开(公告)日：2010-08-05

申请号：US12651777

申请日：2010-01-04

申请人： Venugopal Srinivasan ,  Keqiang Deng ,  Daozheng Lu

发明人： Venugopal Srinivasan ,  Keqiang Deng ,  Daozheng Lu

IPC分类号： H04R29/00

CPC分类号： H04H60/29 ,  G10L25/48 ,  H04H60/58

摘要： A signature is extracted from the audio of a program received by a tunable receiver such that the signature characterizes the program. In order to extract the signature, blocks of the audio are converted to corresponding spectral moments. At least one of the spectral moments is then converted to the signature. Also, a test audio signal from a receiver is correlated to a reference audio signal by converting the test audio signal and the reference audio signal to corresponding test and reference spectra, determining test slopes corresponding to coefficients of the test spectrum and reference slopes corresponding to coefficients of the reference spectrum, and comparing the test slopes to the reference slopes in order to determine a match between the test audio signal and the reference audio signal.

摘要翻译： 从可调谐接收机接收的节目的音频中提取签名，使得该签名表征该节目。 为了提取签名，将音频的块转换为相应的频谱矩。 然后将至少一个光谱时刻转换为签名。 此外，来自接收机的测试音频信号通过将测试音频信号和参考音频信号转换为相应的测试和参考频谱与参考音频信号相关，确定对应于测试频谱的系数的测试斜率和对应于系数的参考斜率 并且将测试斜率与参考斜率进行比较，以便确定测试音频信号和参考音频信号之间的匹配。

公开(公告)号：US07451092B2

公开(公告)日：2008-11-11

申请号：US10794194

申请日：2004-03-05

申请人： Venugopal Srinivasan

发明人： Venugopal Srinivasan

IPC分类号： G10L19/00

CPC分类号： G10L19/0212

摘要： An encoder transforms at least a portion of a signal, counts the resulting transform coefficients having a zero value, and encodes the signal with the zero count. A decoder decodes the signal in order to recover the zero count. The decoder may also determine its own zero count of the signal as received and may compare the zero count that it determines to the recovered zero count. The decoder may be arranged to detect compression/decompression based upon results from the comparison, and/or the decoder may be arranged to prevent use of a device based upon results from the comparison.

摘要翻译： 编码器变换信号的至少一部分，对所得到的具有零值的变换系数进行计数，并对该零信号进行编码。 解码器对信号进行解码，以恢复零计数。 解码器还可以确定其自己的接收到的信号的零计数，并且可以将其确定的零计数与恢复的零计数进行比较。 解码器可以被布置为基于来自比较的结果来检测压缩/解压缩，和/或解码器可以被布置为基于比较的结果来防止使用设备。

公开(公告)号：US20050232411A1

公开(公告)日：2005-10-20

申请号：US11143808

申请日：2005-06-02

申请人： Venugopal Srinivasan ,  Keqiang Deng ,  Daozheng Lu

发明人： Venugopal Srinivasan ,  Keqiang Deng ,  Daozheng Lu

IPC分类号： G10L11/00 ,  G10L19/00 ,  H04H1/00 ,  H04H60/29 ,  H04H60/58 ,  H04M1/24 ,  H04N7/08

CPC分类号： H04H60/29 ,  G10L25/48 ,  H04H60/58

摘要： A signature is extracted from the audio of a program received by a tunable receiver such that the signature characterizes the program. In order to extract the signature, blocks of the audio are converted to corresponding spectral moments. At least one of the spectral moments is then converted to the signature. Also, a test audio signal from a receiver is correlated to a reference audio signal by converting the test audio signal and the reference audio signal to corresponding test and reference spectra, determining test slopes corresponding to coefficients of the test spectrum and reference slopes corresponding to coefficients of the reference spectrum, and comparing the test slopes to the reference slopes in order to determine a match between the test audio signal and the reference audio signal.

摘要翻译： 从可调谐接收机接收的节目的音频中提取签名，使得该签名表征该节目。 为了提取签名，将音频的块转换为相应的频谱矩。 然后将至少一个光谱时刻转换为签名。 此外，来自接收机的测试音频信号通过将测试音频信号和参考音频信号转换为相应的测试和参考频谱与参考音频信号相关，确定对应于测试频谱的系数的测试斜率和对应于系数的参考斜率 并且将测试斜率与参考斜率进行比较，以便确定测试音频信号和参考音频信号之间的匹配。

公开(公告)号：US06272176B1

公开(公告)日：2001-08-07

申请号：US09116397

申请日：1998-07-16

申请人： Venugopal Srinivasan

发明人： Venugopal Srinivasan

IPC分类号： H04B166

CPC分类号： H04H20/31 ,  H04H20/33 ,  H04H60/37 ,  H04H60/39 ,  H04H2201/50

摘要： An encoder is arranged to add a binary code bit to block of a signal by selecting, within the block, (i) a reference frequency within the predetermined signal bandwidth, (ii) a first code frequency having a first predetermined offset from the reference frequency, and (iii) a second code frequency having a second predetermined offset from the reference frequency. The spectral amplitude of the signal at the first code frequency is increased so as to render the spectral amplitude at the first code frequency a maximum in its neighborhood of frequencies and is decreased at the second code frequency so as to render the spectral amplitude at the second code frequency a minimum in its neighborhood of frequencies. Alternatively, the portion of the signal at one of the first and second code frequencies whose spectral amplitude is smaller may be designated as a modifiable signal component such that, in order to indicate the binary bit, the phase of the modifiable signal component is changed so that this phase differs within a predetermined amount from the phase of the reference signal component. As a still further alternative, the spectral amplitude of the first code frequency may be swapped with a spectral amplitude of a frequency having a maximum amplitude in the first neighborhood of frequencies and the spectral amplitude of the second code frequency may be swapped with a spectral amplitude of a frequency having a minimum amplitude in the second neighborhood of frequencies. A decoder may be arranged to decode the binary bit.

摘要翻译： 编码器被布置为通过在该块内选择（i）预定信号带宽内的参考频率来添加二进制码比特到信号块，（ii）具有从参考频率的第一预定偏移的第一码频率 ，和（iii）具有与参考频率的第二预定偏移的第二代码频率。 在第一编码频率处的信号的频谱幅度增加，以便在频率附近使第一编码频率处的频谱振幅最大，并以第二编码频率减小，以便使频谱幅度在第二编码频率 代码频率在其频率附近最小。 或者，在频谱幅度较小的第一和第二代码频率之一处的信号部分可以被指定为可修改信号分量，使得为了指示二进制位，可修改信号分量的相位改变为 该相位与参考信号分量的相位在预定量之内不同。 作为另外的替代方案，第一编码频率的频谱幅度可以用在第一频率附近具有最大幅度的频率的频谱幅度进行交换，并且第二编码频率的频谱幅度可以用频谱幅度 在第二频率附近具有最小振幅的频率。 解码器可以被布置为对二进制位进行解码。

公开(公告)号：US4641972A

公开(公告)日：1987-02-10

申请号：US650824

申请日：1984-09-14

申请人： Maurice Halioua ,  Venugopal Srinivasan

发明人： Maurice Halioua ,  Venugopal Srinivasan

IPC分类号： G01B11/24 ,  G01B11/25

CPC分类号： G01B11/2527

摘要： Phase measurements of deformed grating images are used in performing improved optical profilometry. In one embodiment, phase differences between images of an object and a reference plane are used to obtain a measure of the object height.

摘要翻译： 变形光栅图像的相位测量用于执行改进的光学轮廓测量。 在一个实施例中，使用对象和参考平面的图像之间的相位差来获得对象高度的度量。

公开(公告)号：US09426525B2

公开(公告)日：2016-08-23

申请号：US14144624

申请日：2013-12-31

申请人： Padmanabhan Soundararajan ,  Venugopal Srinivasan ,  Alexander Topchy

发明人： Padmanabhan Soundararajan ,  Venugopal Srinivasan ,  Alexander Topchy

IPC分类号： H04H60/33 ,  H04N21/442 ,  H04N21/41

CPC分类号： H04N21/44218 ,  H04N21/4126 ,  H04N21/44222 ,  H04N21/44231 ,  H04N21/4524

摘要： Methods, apparatus, systems and articles of manufacture to count people in an audience are disclosed. An example method includes analyzing location information collected by a portable device indicative of a location of the portable device. The method also includes analyzing proximity information collected by the portable device indicative of when a person is near the portable device. The example method further includes generating presence information based on (1) the location information and (2) the proximity information, the presence information being indicative of whether the person is present in a media exposure environment associated with a media presentation device.

摘要翻译： 披露了计算观众人数的方法，设备，系统和制品。 示例性方法包括分析由便携式设备收集的指示便携式设备的位置的位置信息。 该方法还包括分析便携式设备收集的邻近信息，指示人在什么时候在便携式设备附近。 该示例性方法还包括基于（1）位置信息和（2）邻近信息来生成呈现信息，该呈现信息指示该人是否存在于与媒体呈现设备相关联的媒体曝光环境中。