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公开(公告)号：US4614971A
公开(公告)日：1986-09-30
申请号：US455658
申请日：1983-01-05
CPC分类号： H04N7/0882
摘要： A system is disclosed for eliminating error in teletext signals caused by the presence of noise accompanying the teletext signals. The system includes: (1) a teletext packet buffer which receives the teletext signal and transfers the teletext signals to a teletext decoder in the absence of noise accompanying the teletext signals; (2) a timing circuit which produces timing signals from television synchronous signals; (3) a control circuit which controls the teletext packet buffer in response to the timing signals; and (4) a noise detector which detects whether noise is present in the teletext signal and disables the teletext packet buffer to prevent the transfer of the teletext signal from the teletext packet buffer to the teletext decoder if the teletext signal was received in the presence of noise.
摘要翻译： 公开了一种用于消除伴随图文电视信号的噪声的存在引起的图文电视信号误差的系统。 该系统包括：（1）在没有伴随图文电视信号的噪声的情况下，接收文字多重信号并将图文电视信号传送到图文解码器的图文包分组缓冲器; （2）产生来自电视同步信号的定时信号的定时电路; （3）响应于定时信号控制图文包的缓冲器的控制电路; 以及（4）噪声检测器，其检测图文电视信号中是否存在噪声，并且禁用图文电视包缓冲器，以防止在图文电视信号是否存在下接收图文电视信号时，图文电视信号从图文电视包缓冲器传送到图文电视解码器 噪声。
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2.发明授权Method and apparatus for enabling digital rights management in file transfers 有权用于在文件传输中实现数字版权管理的方法和装置公开(公告)号：US08140439B2
公开(公告)日：2012-03-20
申请号：US11739868
申请日：2007-04-25
申请人： William L. Olson , Vida Ilderem , Frederick L. Kitson , Morris A. Moore , Paul Moroney , Petr Peterka , Theodore S. Rzeszewski , Robert H. Yacobellis
发明人： William L. Olson , Vida Ilderem , Frederick L. Kitson , Morris A. Moore , Paul Moroney , Petr Peterka , Theodore S. Rzeszewski , Robert H. Yacobellis
IPC分类号： G06F21/00
CPC分类号： G06F21/10
摘要： Embodiments of the invention generally provide a method and apparatus for enabling digital rights management in file transfers. One embodiment of a method for transferring digital content from a first user to a second user, includes transferring ownership of an instance of the digital content to the second user, where the instance of the digital content resides on a first device belonging to the first user. Copies of the digital content are then deleted from one or more additional devices belonging to the first user (including at least one offline device).
摘要翻译： 本发明的实施例一般提供了一种用于在文件传送中实现数字版权管理的方法和装置。 用于将数字内容从第一用户传送到第二用户的方法的一个实施例包括将数字内容的实例的所有权转移给第二用户，其中数字内容的实例驻留在属于第一用户的第一设备上 。 然后从属于第一用户的一个或多个附加设备（包括至少一个离线设备）删除数字内容的副本。
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公开(公告)号：US20090259496A1
公开(公告)日：2009-10-15
申请号：US12101950
申请日：2008-04-11
IPC分类号： G06Q40/00
摘要： Embodiments of the invention generally provide a method and apparatus for insuring digital content. One embodiment of a method for insuring digital content includes receiving a request to insure a specific instance of digital content and associating insurance with the instance of digital content, such that the instance of digital content can be restored to an owner of the instance of digital content in an event that the instance of digital content becomes unusable. At least one of: a copy of the at least one instance of digital content, metadata related to the at least one instance of digital content, and data related to the insurance is stored in at least one database.
摘要翻译： 本发明的实施例通常提供用于确保数字内容的方法和装置。 用于确保数字内容的方法的一个实施例包括接收确保数字内容的特定实例并将保险与数字内容的实例相关联的请求，使得可以将数字内容的实例恢复为数字内容的实例的所有者 在数字内容的实例变得不可用的情况下。 至少一个：数字内容的至少一个实例的副本，与数字内容的至少一个实例有关的元数据，以及与保险相关的数据被存储在至少一个数据库中。
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4.发明授权Electronic television program guide for a television system having two tuners 失效具有两个调谐器的电视系统的电子电视节目指南
公开(公告)号：US5699125A
公开(公告)日：1997-12-16
申请号：US415181
申请日：1995-03-31
IPC分类号： H04N5/445 , H04N7/08 , H04N7/081 , H04N7/083 , H04N7/087 , H04N7/088 , H04N21/426 , H04N21/482 , H04N21/84 , H04N5/44
CPC分类号： H04N21/4263 , H04N21/4332 , H04N21/435 , H04N21/4532 , H04N21/4586 , H04N21/482 , H04N21/84 , H04N5/44543 , H04N21/4755
摘要： A method and device for receiving and storing an electronic television (TV) program guide. In a satellite, cable or broadcast TV system, electronic TV program guides may be coded into the video signals received by the TV receiver. Many currently available TV receivers also allow users to program a list of "select-channels." When the receiver is in its select-channel mode, the receiver only tunes to the channels the user stored in the list of select channels. The present invention limits the memory and processing power required to store an electronic TV program guide by only storing program guide information associated with the channels stored by the user in connection with the select-channels function of the receiver. In receivers having a second tuner, the second tuner may be used to automatically update the stored program guide.
摘要翻译： 一种用于接收和存储电子电视（TV）节目指南的方法和装置。 在卫星，有线电视或广播电视系统中，电视节目指南可以被编码到由TV接收机接收的视频信号中。 许多当前可用的电视接收机还允许用户编制“选择频道”列表。 当接收机处于选择通道模式时，接收器仅调谐到用户存储在选择通道列表中的通道。 本发明通过仅存储与用户所存储的与所述接收机的选择频道功能相关联的频道的节目指南信息来限制存储电子节目指南所需的存储器和处理能力。 在具有第二调谐器的接收机中，第二调谐器可用于自动更新存储的节目指南。
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公开(公告)号：US4979228A
公开(公告)日：1990-12-18
申请号：US274607
申请日：1988-11-22
IPC分类号： H04N5/14
CPC分类号： H04N5/142
摘要： A digital subsystem for improving the resolution of a TV digital signal by inserting additional digital samples into the digital TV signal in response to the correspondence of the digital signal and predefined patterns. The digital subsystem is a logic circuit which is responsive to received digital samples to group these digital samples into sets of samples. The digital circuit then calculates the slope between pairs of digital samples of each set and utilizes the calculated slopes to determine the correspondence to the predefined patterns. The determined predefined pattern designates the digital sample to be inserted into each set. The inserted digital sample is either equal to one of the digital samples or the average between two of the digital samples of each set. The calculation of the slopes results in a logical "0" for a constant slope and a logical "1" for a negative or a positive slope. An Exclusive OR gate is utilized to make the determination of whether to use a value equal to one of the digital samples of the set or the average of the value of two of the digital samples. A slope is considered constant if the difference between the pair of digital samples is less than a value calculated from range information of the set of samples.
摘要翻译： 数字子系统，用于通过根据数字信号和预定模式的对应关系，将额外的数字样本插入到数字电视信号中来改善TV数字信号的分辨率。 数字子系统是对所接收的数字样本进行响应的逻辑电路，以将这些数字样本分组成一组样本。 然后，数字电路计算每组数字样本对之间的斜率，并利用计算出的斜率来确定与预定模式的对应关系。 所确定的预定义模式指定要插入到每个集合中的数字样本。 插入的数字样本或者等于数字采样之一或每组数字采样之间的平均值。 斜率的计算对于恒定斜率导致逻辑“0”，对于负斜率或正斜率导致逻辑“1”。 使用异或门来确定是否使用等于集合的数字样本中的一个或两个数字样本的值的平均值的值。 如果一对数字样本之间的差小于从样本集合的范围信息计算的值，则将斜率视为恒定的。
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公开(公告)号：US4389637A
公开(公告)日：1983-06-21
申请号：US293194
申请日：1981-08-17
CPC分类号： H03M1/82
摘要： A digital to analog converter utilizes a digital missing pulse detector as a time interval measuring means in which the detector includes a programmable counter, the count of which is set to correspond with the digital number or word to be converted. Clock pulses at a high frequency are applied to advance the programmable counter from a reset condition to a terminal or output condition, and the time interval produced depends upon the binary word or number set into the programmable counter. Pulses at a second lower frequency, equal to the repetition rate of the system, are applied to the input of the time interval measuring circuit; so that the output is a series of pulse width modulated pulses having a duty cycle corresponding to the binary word originally set into the programmable counter. A low pass filter is connected to the output of the time interval measuring circuit and provides an analog output signal at a voltage level corresponding to the binary number or word originally set into the programmable counter.
摘要翻译： 数模转换器利用数字缺失脉冲检测器作为时间间隔测量装置，其中检测器包括可编程计数器，其计数被设置为与要转换的数字数字或字对应。 施加高频时钟脉冲以将可编程计数器从复位状态提前到终端或输出状态，产生的时间间隔取决于设置到可编程计数器中的二进制字或数字。 等于系统重复频率的第二较低频率的脉冲被施加到时间间隔测量电路的输入; 使得输出是具有对应于原始设置到可编程计数器中的二进制字的占空比的一系列脉宽调制脉冲。 低通滤波器连接到时间间隔测量电路的输出端，并提供一个模拟输出信号，该模拟输出信号的电压电平与原来设置在可编程计数器中的二进制数或字对应。
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公开(公告)号：US4048652A
公开(公告)日：1977-09-13
申请号：US629427
申请日：1975-11-06
CPC分类号： H04N9/643
摘要： An automatic hue control system operates to correct the phase of the color subcarrier reference signal used to operate the demodulators of a color television receiver. A regenerated color subcarrier signal at the phase of the I axis or the axis of flesh color is fed to one input of a phase comparator. The amplitude limited chrominance signal is fed to another input of the phase comparator, the output of which is used to operate a single pole double throw switch circuit. The switch passes the regenerated subcarrier signal to the demodulators when the phase difference between the limited chrominance and the regenerated subcarrier signals is outside a predetermined angle on each side of the I or flesh axis. Whenever the phase relationship between the limited chrominance signal and the subcarrier reference signal places the two signals within the predetermined angle on each side of the I or flesh axis, the switch circuit passes the limited chrominance signal to the demodulators as the color subcarrier reference signal.
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公开(公告)号：US4038689A
公开(公告)日：1977-07-26
申请号：US695855
申请日：1976-06-14
CPC分类号： H03J7/065 , H03J5/0272 , H04B1/14
摘要： A television tuning system employs a frequency synthesizer system for establishing the tuning of the receiver. A first programmable frequency divider controlled by a reversible counter is connected between the output of a reference oscillator and a phase comparator to which the output of the local oscillator, after passing through another programmable frequency divider, also is applied. The phase comparator output is a tuning voltage used to control the tuning of the local oscillator. A logic circuit is coupled to sense predetermined relationships of signals from a picture carrier detector, a sound carrier detector, an AFT signal, and the presence of vertical synchronization signal components for changing the count in the reversible binary counter to adjust the first programmable frequency divider to compensate for channel frequency offsets which may occur in excess of the pull-in range of the AFT circuit. To enable operation of the receiver in a fringe area, where it may be desirable to intentionally mistune a channel slightly, manual fine tuning control logic circuitry is employed to disable the frequency offset logic circuit and to permit changing the count of the reversible counter by the viewer to manually fine tune the receiver as desired.
摘要翻译： 电视调谐系统采用频率合成器系统来建立接收机的调谐。 由可逆计数器控制的第一可编程分频器连接在参考振荡器的输出和相位比较器之间，在通过另一个可编程分频器之后，本地振荡器的输出也被施加到该相位比较器。 相位比较器输出是用于控制本地振荡器调谐的调谐电压。 逻辑电路被耦合以感测来自图像载波检测器，声音载波检测器，AFT信号的信号的预定关系，以及用于改变可逆二进制计数器中的计数的垂直同步信号分量的存在，以调整第一可编程分频器 以补偿可能发生超过AFT电路的吸合范围的信道频率偏移。 为了使接收器在边缘区域中的操作，其中可能需要稍微有意地使通道故意，使用手动微调控制逻辑电路来禁用频率偏移逻辑电路，并且允许将可逆计数器的计数改变为 观众按需要手动微调接收机。
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9.发明授权Method, device and system for dynamically embedding watermark information into multimedia content 有权将水印信息动态嵌入多媒体内容的方法，设备和系统公开(公告)号：US08565472B2
公开(公告)日：2013-10-22
申请号：US11927975
申请日：2007-10-30
IPC分类号： G06K9/00
CPC分类号： G06T1/0028 , G06T2201/0052 , G06T2201/0061
摘要： A method and devices for dynamically embedding watermark and/or end-user access information into multimedia content. The method includes providing multimedia content transformed into blocks that each include an array of pixel blocks, and dynamically embedding portions of watermark and/or end-user access information into selected pixel blocks based on the values of the coefficients within the pixel blocks. For multimedia content encoded using discrete cosine transform (DCT) or other block-based encoding, the transform coefficients to include embedded information are chosen based on analysis of the coefficient values, rather than in a fixed or predetermined manner. Also, embedding watermark and/or end-user access information can occur across different pixel blocks within a given image to reduce the number of embedded coefficients per block, within the peripheral pixel blocks within a given image, and/or in different areas across images to reduce the duration of embedded information in any one area.
摘要翻译： 一种用于将水印和/或最终用户访问信息动态地嵌入到多媒体内容中的方法和装置。 该方法包括提供转换成块的多媒体内容，每个块包括像素块的阵列，并且基于像素块内的系数的值，动态地将水印和/或最终用户访问信息的部分嵌入到所选择的像素块中。 对于使用离散余弦变换（DCT）或其他基于块的编码编码的多媒体内容，基于系数值的分析而不是以固定或预定的方式来选择包括嵌入信息的变换系数。 此外，嵌入水印和/或最终用户访问信息可以发生在给定图像内的不同像素块之间，以减少在给定图像内的外围像素块内和/或跨图像的不同区域中每块的嵌入系数的数量 以减少任何一个区域嵌入信息的持续时间。
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10.发明授权Recombination of low- and high-resolution segments of an extended aspect ratio picture 失效扩展宽高比图片的低分辨率和高分辨率片段的重组
公开(公告)号：US4694328A
公开(公告)日：1987-09-15
申请号：US684488
申请日：1984-12-21
IPC分类号： H04N9/00 , H04N7/01 , H04N7/015 , H04N9/77 , H04N11/24 , H04N17/00 , H04N9/64 , H04N7/08 , H04N11/20 , H04N5/208
CPC分类号： H04N11/004
摘要： A television (TV) system having provision for automatically compensating for signal distortion which would cause artifacts at the point where high- and low-resolution portions of an extended aspect ratio, high-definition TV display are joined together. Compensation parameters are calculated at the TV receiver in response to a known test pattern transmitted during the vertical retrace interval of the TV display and then accessed and utilized to compensate received active display signals. The compensation parameters are calculated by first converting Y, I, and Q signals for the test pattern into digital samples and then processing these digital samples in a digital signal processor unit. After the compensation parameters have been calculated by the digital signal processor, they are stored in a memory. The received active display signals are compensated by accessing the stored compensation parameters during the active display time. Each accessed compensation parameter is converted to an analog signal and is multiplied with received Y, I, and Q edge signals and combined with the center signals to compensate for distortions. In addition, the stored parameters are also averaged over a period of time to stop transient conditions from affecting the stored value of a compensation parameter.
摘要翻译： 提供用于自动补偿信号失真的电视（TV）系统，其将在长宽比高清晰度电视显示器的高分辨率部分和低分辨率部分连接在一起的地方造成伪影。 响应于在TV显示器的垂直回扫间隔期间发送的已知测试模式，在TV接收机处计算补偿参数，然后被访问并用于补偿接收的活动显示信号。 通过首先将测试图案的Y，I和Q信号转换为数字样本，然后在数字信号处理器单元中处理这些数字采样来计算补偿参数。 在数字信号处理器计算出补偿参数后，将其存储在存储器中。 通过在活动显示时间期间访问所存储的补偿参数来补偿所接收的活动显示信号。 每个访问的补偿参数被转换为模拟信号，并与接收的Y，I和Q边沿信号相乘，并与中心信号相结合以补偿失真。 此外，所存储的参数在一段时间内也被平均，以停止瞬态条件影响补偿参数的存储值。
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