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公开(公告)号：US4041535A
公开(公告)日：1977-08-09
申请号：US707674
申请日：1976-07-22
CPC分类号： H03J7/18 , H03J5/0272 , H03J7/285
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 discriminator circuit, 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 discriminator circuit. To permit operation of the receiver as a signal seek receiver, a pair of signal seek pushbuttons for the "up" and for the "down" direction, respectively, are provided. Operation of either of these pushbuttons functions in conjunction with further logic circuitry and in conjunction with timing circuitry to automatically step tune the receiver channel-by-channel in the selected direction until a channel with a signal present is sensed by the first logic circuit, whereupon the signal seek circuit operation is disabled until one or the other of the signal seek pushbuttons is reactivated.
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鉴别器电路的信号的预定关系，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，以调整第一可编程频率 分频器来补偿可能发生超过AFT鉴频电路的拉入范围的信道频率偏移。 为了允许接收机作为信号寻道接收机的操作，分别提供了用于“向上”和“向下”方向的一对信号寻道按钮。 这些按钮中的任一个的操作与另外的逻辑电路一起起作用，并结合定时电路在所选择的方向上逐个频道地逐步调谐接收器，直到存在信号的通道被第一逻辑电路感测到， 信号搜索电路操作被禁用，直到信号寻道按钮的一个或另一个被重新激活。
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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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公开(公告)号：US3949158A
公开(公告)日：1976-04-06
申请号：US537692
申请日：1974-12-31
摘要： A wide-band automatic fine tuning (AFT) circuit capable of a .+-.2 MHz pull-in range without false lockups responds to the output of a picture carrier discriminator, a sound carrier discriminator and a vertical synchronizing signal sensing means to operate a reversible digital counter in either its count up or count down direction depending upon the relationship of the outputs of the two discriminators and the synchronizing signal sensing circuit. The output of the counter is supplied to a digital-to-analog converter which produces a tuning control voltage used for controlling the frequency of operation of the local oscillator of the receiver. The output of the digital-to-analog converter is added to a conventional AFT voltage which maintains the desired tuning once it has been established by the wide-band AFT system.
摘要翻译： 能够具有+/- 2MHz拉入范围而没有错误锁定的宽频带自动微调（AFT）电路对图像载波鉴频器，声音载波鉴频器和垂直同步信号感测装置的输出进行响应，以操作 取决于两个鉴别器和同步信号感测电路的输出的关系，其可逆数字计数器的计数向上或向下计数。 计数器的输出被提供给数模转换器，其产生用于控制接收器的本地振荡器的操作频率的调谐控制电压。 数模转换器的输出被添加到传统的AFT电压，一旦一旦已经由宽带AFT系统建立，它将保持期望的调谐。
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公开(公告)号：US4214274A
公开(公告)日：1980-07-22
申请号：US916489
申请日：1978-06-19
CPC分类号： H03J1/005
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 responsive to characteristics of the received signals changes 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 discriminator circuit. To permit operation of the receiver as a signal seek receiver, a pair of signal seek push buttons for the "up" and for the "down" direction, respectively, are provided. Operation of either of these push buttons functions in conjunction with further logic circuitry and in conjunction with timing circuitry to automatically step tune the receiver channel-by-channel in the selected direction until a channel with a signal present is sensed by the first logic circuit, whereupon the signal seek circuit operation is disabled until one or the other of the signal seek push buttons is reactivated. The dwell time of the logic circuit for some steps is extended depending upon the relationship of the new channel to the previous channel. The dwell time also is extended for manual or direct access channel selection.
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。 响应于接收信号的特性的逻辑电路改变可逆二进制计数器中的计数，以调整第一可编程分频器，以补偿超过AFT鉴频器电路的引入范围可能发生的信道频率偏移。 为了允许接收机作为信号寻道接收机的操作，分别提供了用于“向上”和“向下”方向的一对信号寻道按钮。 这些按钮中的任一个的操作与另外的逻辑电路一起工作，并结合定时电路，以在选定的方向上逐个频道逐个调谐接收器，直到具有第一逻辑电路的信号存在的信道被检测到， 因此信号搜索电路操作被禁用，直到信号寻道按钮中的一个或另一个被重新激活。 逻辑电路的一些步骤的停留时间根据新通道与先前通道的关系而延长。 停留时间也被扩展到手动或直接访问频道选择。
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5.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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7.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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