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11. 发明公开

EP1652385A1 METHOD AND DEVICE FOR GENERATING AND DETECTING FINGERPRINTS FOR SYNCHRONIZING AUDIO AND VIDEO 有权
标题翻译：方法和装置的生成和指纹检测用于同步音频和视频
公开(公告)号：EP1652385A1
公开(公告)日：2006-05-03
申请号：EP04744615.8
申请日：2004-07-20
申请人： Koninklijke Philips Electronics N.V.
发明人： OOSTVEEN, Job, C. , ROBERTS, David, K. , DENISSEN, Adrianus, J., M. , TEN KATE, Warner, R., T.
IPC分类号： H04N7/24 , H04N7/62 , H04N7/26 , H04N7/52
CPC分类号： H04N5/04 , G10L25/48 , G11B27/24 , G11B27/34 , H04N21/23892 , H04N21/242 , H04N21/4307 , H04N21/44008 , H04N21/8547
摘要： This invention relates to a device and a method of generating a first and a second fingerprint (102,104) usable for synchronisation of at least two signals (101,103) and corresponding method and device for synchronising two or more signals. A fingerprint pair is generated on the basis of a segment of a first signal e.g. an audio signal and of a segment of a second signal e.g. a video signal at each synchronisation time point. The generated fingerprint pair(s) are stored in a database (203) and communicated or distributed to a synchronisation device (303). During synchronisation, fingerprint(s) of the audio signal and fingerprint(s) of the video signal to be synchronised are generated and matched against fingerprints in the database. When a match is found, the fingerprints also determine the synchronisation time point, which is used to synchronise the two signals. In this way, a simple, reliable and efficient way of synchronising at least two signals is obtained. Further, this is enabled without modifying either the first and second signal (or subsequent signals). The signals may even be distorted or changed to some extent while still enabling synchronisation.

12. 发明公开

EP1552473A1 LOCALISATION OF IMAGE TAMPERING 审中-公开
标题翻译：图像篡改的本地化
公开(公告)号：EP1552473A1
公开(公告)日：2005-07-13
申请号：EP03748420.1
申请日：2003-10-08
申请人： Koninklijke Philips Electronics N.V.
发明人： ROBERTS, David, K.
IPC分类号： G06T1/00 , H04N1/32
CPC分类号： G06T1/0042 , G06T2201/0051 , G06T2201/0061 , H04N1/32149 , H04N2201/3235 , H04N2201/3236
摘要： A method and device (8) for verifying the authenticity of media content is provided. According to an embodiment accurate tampering location for digital image authentication is provided. Typically, a suspect image is divided into blocks. For each block, an authentication bit is generated by computing a property of the image content and then thresholding said property to give a '0' or '1'. The authentication bits of the suspect image are compared with those of the original image. If there is a mismatch, and the content has indeed been tampered, tampering is detected. A mismatch due to allowable operations, such as e.g. compression, is called a false alarm, which should be avoided. A so-called ROC curve (Receiver Operating Characteristic) gives the relation between detection probability and false alarm probability. Preferably, the threshold used to determine the authentication bits represents an operation point on the ROC curve. In accordance with an embodiment of the invention, an operation point corresponding to a low false alarm probability is initially chosen. In order to more precisely identify a tampered image area, the authentication decisions are repeated for neighbouring blocks, using a different operation point. This continues until no further tampered blocks are found. Thus improved tampering localisation is provided, being valuable e.g. to authenticate images captured by e.g. a security camera, and localise any tampered areas, whereby the value of these images is increased as e.g. evidence in a court of law.
摘要翻译：提供了用于验证媒体内容的真实性的方法和设备（8）。根据一个实施例，提供了用于数字图像认证的准确篡改位置。通常情况下，可疑图像被分成块。对于每个块，通过计算图像内容的属性，然后对所述属性进行阈值处理以给出'0'或'1'来生成认证位。将可疑图像的认证位与原始图像的认证位进行比较。如果不匹配，并且内容确实被篡改，则检测到篡改。由于允许的操作而导致的不匹配，例如，压缩，被称为虚警，应该避免。所谓的ROC曲线（接收机操作特性）给出了检测概率和虚警概率之间的关系。优选地，用于确定认证比特的阈值表示ROC曲线上的操作点。根据本发明的实施例，初始选择对应于低虚警概率的操作点。为了更精确地识别被篡改的图像区域，使用不同的操作点为相邻块重复认证判定。这个过程一直持续到没有发现进一步的篡改块。因此提供了改进的篡改定位，这是有价值的，验证由例如图像捕获的图像。安全摄像机，并定位任何篡改区域，由此这些图像的价值增加，例如，法庭上的证据。

13. 发明公开

EP1127415A1 BATTERY ECONOMISING IN A COMMUNICATIONS SYSTEM 有权
标题翻译： einem Kommunikationssystem中的Batterieeinsparung
公开(公告)号：EP1127415A1
公开(公告)日：2001-08-29
申请号：EP00956450.1
申请日：2000-08-15
申请人： Koninklijke Philips Electronics N.V.
发明人： MARSHALL, Paul, R. , ROBERTS, David, K. , BURBIDGE, Richard, C.
IPC分类号： H04B1/16
CPC分类号： H04L1/0045 , H04W52/0229 , H04W52/0241 , H04W52/0245 , Y02D70/166
摘要： In communications systems such as telemetry systems in which a receiver ( 34 ) is periodically energised to receive transmissions from a central station, the receiver includes a power control means ( 12 ) for controlling the energisation of the receiver, a circuit ( 48 ) for detecting the presence of a carrier, which circuit ( 48 ) causes the power control means to de-energise the receiver ( 34 ) in the event of carrier not being detected, and a signal quality measuring stage ( 50 ) for determining if the demodulated signal is decodable, the stage ( 50 ) causing the power control means to de-energise the receiver ( 34 ) in the event of the signal quality not being acceptable.
摘要翻译：在诸如遥测系统的通信系统中，接收器（34）周期性地被激励以接收来自中心站的传输，所述接收机包括用于控制接收机的通电的功率控制装置（12），用于检测的电路载波的存在，该电路（48）使得功率控制装置在载波未被检测的情况下使接收机（34）断电;以及信号质量测量级（50），用于确定解调信号是否为可解码的，在信号质量不可接受的情况下，导致功率控制装置使接收器（34）断电的级（50）。

14. 发明公开

EP1118166A1 GENERATING A CYCLIC SEQUENCE OF FREQUENCIES 有权
标题翻译：制备环状率的影响
公开(公告)号：EP1118166A1
公开(公告)日：2001-07-25
申请号：EP00956301.6
申请日：2000-07-24
申请人： Koninklijke Philips Electronics N.V.
发明人： ROBERTS, David, K.
IPC分类号： H04B1/713 , H04J13/06
CPC分类号： H04J13/00 , H04B1/7143 , H04B2001/7154
摘要： A specific cyclic sequence of frequencies for use as a carrier hop sequence by a mobile station in a mobile radio communication system is chosen from a list of usable frequencies by means of a sequence of indices derived from the unique identifier of the mobile station. The indices are used to indicate respective positions in the list and hence to choose a succession of frequencies to make up one cycle of the cyclic sequence. The list is updated between successive choices of a frequency therefrom, making it possible to ensure, by appropriate exclusions from the list each time, that the succession of frequencies chosen satisfies predetermined constraints such as minimum hop distance and minimum stay-away time, either absolutely or to the maximum extent possible. Each index i may be derived from the unique identifier ID by means of an expression of the form i = |f(ID,M)| modulo W, where M is the ordinal number, in the succession of frequencies, of the frequency being selected by that index and W is the current length of the list.

15. 发明授权

EP1652385B1 METHOD AND DEVICE FOR GENERATING AND DETECTING FINGERPRINTS FOR SYNCHRONIZING AUDIO AND VIDEO 有权
标题翻译：方法和装置的生成和指纹检测用于同步音频和视频
公开(公告)号：EP1652385B1
公开(公告)日：2007-09-12
申请号：EP04744615.8
申请日：2004-07-20
申请人： Koninklijke Philips Electronics N.V.
发明人： OOSTVEEN, Job, C. , ROBERTS, David, K. , DENISSEN, Adrianus, J., M. , TEN KATE, Warner, R., T.
IPC分类号： H04N7/24 , H04N7/62 , H04N7/26 , H04N7/52
CPC分类号： H04N5/04 , G10L25/48 , G11B27/24 , G11B27/34 , H04N21/23892 , H04N21/242 , H04N21/4307 , H04N21/44008 , H04N21/8547
摘要： This invention relates to a device and a method of generating a first and a second fingerprint (102,104) usable for synchronisation of at least two signals (101,103) and corresponding method and device for synchronising two or more signals. A fingerprint pair is generated on the basis of a segment of a first signal e.g. an audio signal and of a segment of a second signal e.g. a video signal at each synchronisation time point. The generated fingerprint pair(s) are stored in a database (203) and communicated or distributed to a synchronisation device (303). During synchronisation, fingerprint(s) of the audio signal and fingerprint(s) of the video signal to be synchronised are generated and matched against fingerprints in the database. When a match is found, the fingerprints also determine the synchronisation time point, which is used to synchronise the two signals. In this way, a simple, reliable and efficient way of synchronising at least two signals is obtained. Further, this is enabled without modifying either the first and second signal (or subsequent signals). The signals may even be distorted or changed to some extent while still enabling synchronisation.

16. 发明授权

EP1127415B1 Battery economising in a communications system 有权
标题翻译：电池节能的通信系统
公开(公告)号：EP1127415B1
公开(公告)日：2007-01-10
申请号：EP00956450.1
申请日：2000-08-15
申请人： Koninklijke Philips Electronics N.V.
发明人： MARSHALL, Paul, R. , ROBERTS, David, K. , BURBIDGE, Richard, C.
IPC分类号： H04B1/16
CPC分类号： H04L1/0045 , H04W52/0229 , H04W52/0241 , H04W52/0245 , Y02D70/166
摘要： In communications systems such as telemetry systems in which a receiver ( 34 ) is periodically energised to receive transmissions from a central station, the receiver includes a power control means ( 12 ) for controlling the energisation of the receiver, a circuit ( 48 ) for detecting the presence of a carrier, which circuit ( 48 ) causes the power control means to de-energise the receiver ( 34 ) in the event of carrier not being detected, and a signal quality measuring stage ( 50 ) for determining if the demodulated signal is decodable, the stage ( 50 ) causing the power control means to de-energise the receiver ( 34 ) in the event of the signal quality not being acceptable.

17. 发明公开

EP1629433A1 DIGITAL FINGERPRINTS AND WATERMARKS FOR IMAGES 审中-公开
标题翻译：数字指纹和水标志PICTURES
公开(公告)号：EP1629433A1
公开(公告)日：2006-03-01
申请号：EP04732704.4
申请日：2004-05-13
申请人： Koninklijke Philips Electronics N.V.
发明人： ROBERTS, David, K.
IPC分类号： G06T1/00
CPC分类号： G06T1/0028 , G06T1/0064 , G06T2201/0051 , G06T2201/0052 , G06T2201/0061
摘要： A method of dividing an image into grid regions for the application of a watermark or fingerprint uses a calculation of centroid of the image to centre the grid and uses centroids of portions of the image to set the size of the grid.

18. 发明公开

EP1518395A1 REAL-TIME SIGNATURE EMBEDDING IN VIDEO 审中-公开
标题翻译：实时签名嵌入视频
公开(公告)号：EP1518395A1
公开(公告)日：2005-03-30
申请号：EP03732922.4
申请日：2003-06-12
申请人： Koninklijke Philips Electronics N.V.
发明人： ROBERTS, David, K. , KLIJN, Jan , SCHIRRIS, Johan, L.
IPC分类号： H04N1/32 , H04N7/08
CPC分类号： H04N1/32192 , H04N1/32144 , H04N1/32293 , H04N7/08 , H04N19/112 , H04N19/467 , H04N2201/3233 , H04N2201/3236
摘要： A method and system for embedding an authentication signature in an audio-visual signal such that only a part of an entire frame of the audio-visual signal is stored in a memory while the signature bits are calculated and the watermark is embedded. A signature is formed based on a first portion of said audio-visual signal, whereby said first portion is a pattern of horizontal lines of said audio-visual signal and has fewer lines than the number of lines of the entire audio-visual signal. Thereafter the signature generated is embedded in said audio-visual signal in the first portion and/or in another portion of the frame to be authenticated, whereby the other portion also is a pattern of horizontal lines. Thus only memory for some lines instead for all lines of the audio-visual signal is needed. In the case of an interlaced audio-visual signal, the first portion is preferably the first field of a frame of said audio-visual signal and the second portion is the second field of said audio-visual signal. In the case of a non-interlaced audio-visual signal, slices of said lines are preferably used for said portions.
摘要翻译：一种用于在音频 - 视频信号中嵌入认证签名的方法和系统，使得当计算签名比特并嵌入水印时，只有音频 - 视频信号的整个帧的一部分被存储在存储器中。基于所述视听信号的第一部分形成签名，由此所述第一部分是所述视听信号的水平线的图案，并且具有比整个视听信号的线数少的线。此后，所生成的签名被嵌入到待鉴别的帧的第一部分和/或另一部分中的所述视听信号中，由此另一部分也是水平线的图案。因此只需要一些线路的存储器而不是视频信号的所有线路。在隔行视听信号的情况下，第一部分最好是所述视听信号的一帧的第一场，而第二部分是所述视听信号的第二场。在非隔行视听信号的情况下，所述行的切片优选用于所述部分。

19. 发明公开

EP1145502A1 A SHORT RANGE, LOW POWER COMMUNICATIONS SYSTEM AND A METHOD OF OPERATING THE SYSTEM 审中-公开
标题翻译：与低档位和操作该低性能和方法通信系统
公开(公告)号：EP1145502A1
公开(公告)日：2001-10-17
申请号：EP00975900.2
申请日：2000-10-23
申请人： Koninklijke Philips Electronics N.V.
发明人： MARSHALL, Christopher, B. , ROBERTS, David, K. , JAMIESON, Philips, A.
IPC分类号： H04L12/28
CPC分类号： H04W48/14 , Y02D70/00
摘要： A short range, low power communications system comprises a plurality of transceiving stations (RCM 1 TO RCM 4) capable of communicating in the ISM band, wherein a station wishing to transmit a data packet, transmits the data packet as a low bit rate, direct sequence spread spectrum (DSSS) signal in a spectrum allocation which is common to at least one geographical region and/or a plurality of countries. A carrier sense multiple access (CSMA) protocol may be used to enable the stations to access said spectrum allocation.
摘要翻译：短距离，低功率通信系统包括收发站（RCM 1 TO RCM 4），其能够在ISM频带中进行通信，worin一个站希望传送一个数据分组的复数，发送该数据包作为一个低比特率的，直接在频谱分配序列扩频（DSSS）信号的所有这是共同的至少一个地理区域和/或国家的复数。载波感测多址（CSMA）协议可用于以使站访问所述频谱分配。

20. 发明公开

EP1101291A1 METHOD OF, AND RECEIVER FOR, FREQUENCY ACQUISITION IN A FREQUENCY HOPPING SYSTEM 有权
标题翻译：方法和接收器在跳频方法频率搜索
公开(公告)号：EP1101291A1
公开(公告)日：2001-05-23
申请号：EP00941972.2
申请日：2000-05-19
申请人： Koninklijke Philips Electronics N.V.
发明人： ROBERTS, David, K.
IPC分类号： H04B1/713
CPC分类号： H04B1/7156 , H04B2001/71563
摘要： A frequency hopping system comprises a transmitting station and a receiving station, both stations storing a frequency hopping sequence comprising a predetermined sequence of N frequencies, where N is an integer greater than 2. In order for the receiving station to acquire synchronisation with the transmitter which is continuously hopping through the sequence of frequencies, the receiver initiates a search by tuning to one of the N frequencies and checking if that frequency corresponds to the currently transmitted frequency during that hop period. If it does not correspond, the receiver eliminates the phase of hopping sequence associated with that frequency and tunes to another of the N frequencies with the exception of the next frequency in the eliminated phase and checks for correspondence. If there is not correspondence then the phase of the hopping sequence associated with that frequency is also eliminated from the search. The search is continued with the progressive elimination from the search of those phases found to be unacceptable until a phase which matches the transmitted phase is found and the search is terminated.

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