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1. 发明授权

US06260193B1 Synchronization of decoders in a bi-directional CATV network 失效
标题翻译：解码器在双向CATV网络中的同步
公开(公告)号：US06260193B1
公开(公告)日：2001-07-10
申请号：US09021006
申请日：1998-02-09
申请人： Kevin T. Chang , David E. Chodelka , Charles E. Schell, III , Sam Reichgott
发明人： Kevin T. Chang , David E. Chodelka , Charles E. Schell, III , Sam Reichgott
IPC分类号： H04N7173
CPC分类号： H04N21/44209 , H04N7/084 , H04N7/088 , H04N7/17309 , H04N21/2221 , H04N21/242 , H04N21/4384 , H04N21/6118 , H04N21/6168 , H04N21/6581
摘要： A system for synchronizing one or more decoders with a network sync signal at a headend of a television communication network. The system allows decoders to transmit upstream messages synchronously in time slots which are defined according to the network sync signal, thereby improving system throughput. Identifying data is provided in a blanking interval (VBI or HBI) of one or more television signals to designate a horizontal scan line of the respective television signal which follows a reference point in the network sync signal by a predetermined delay. At each decoder, the identifying data is recovered, and the onset of the designated scan line can be used to signal the start of a transmission for the decoder. Preferably, the identifying data is provided in each television signal so the user is not forced to tune to a particular television channel to transmit a message. Various channel access protocols may be used, such as a session oriented protocol, or a synchronized ALOHA protocol.
摘要翻译：一种用于在电视通信网络的前端同步一个或多个解码器与网络同步信号的系统。系统允许解码器在根据网络同步信号定义的时隙中同步传输上行消息，从而提高系统吞吐量。在一个或多个电视信号的消隐间隔（VBI或HBI）中提供识别数据，以指定在网络同步信号中的参考点之后预定延迟的相应电视信号的水平扫描线。在每个解码器处，识别数据被恢复，并且可以使用指定的扫描线的开始来通知解码器的传输开始。优选地，在每个电视信号中提供识别数据，使得用户不被强制调谐到特定电视频道以发送消息。可以使用各种信道接入协议，例如面向会话的协议或者同步的ALOHA协议。

2. 发明授权

US08375415B2 Dynamic upstream amplifier power management 有权
公开(公告)号：US08375415B2
公开(公告)日：2013-02-12
申请号：US09811702
申请日：2001-03-19
申请人： Matthew Waight , Yucheng Jin , Kevin T. Chang
发明人： Matthew Waight , Yucheng Jin , Kevin T. Chang
IPC分类号： H04N7/173
CPC分类号： H04N21/6118 , H04L12/12 , H04L12/2801 , H04N7/173 , H04N21/4436 , H04N21/6168 , Y02D50/40 , Y02D50/42
摘要： The present invention is an upstream power control system, within a cable modem which controls the power consumption of the cable modem. The power control system comprises a MAC chip which synchronizes upstream communication signals for transmission to a cable network and outputs an upstream control signal, an upstream amplifier which receives the synchronized upstream communication signals, and a complex programmable logic device (CPLD). The CPLD controls the upstream amplifier in response to the upstream control signal such that the upstream amplifier is powered on during transmission of the communication signals, and powered off when not transmitting, which results in the reduction of power consumed by the cable modem.

3. 发明授权

US07610034B2 Method and apparatus for selection of design parameters for double conversion tuner to prevent radiated immunity degradation 有权
标题翻译：用于选择双转换调谐器的设计参数以防止辐射抗扰度降低的方法和装置
公开(公告)号：US07610034B2
公开(公告)日：2009-10-27
申请号：US11252509
申请日：2005-10-18
申请人： Kevin T. Chang
发明人： Kevin T. Chang
IPC分类号： H04B1/16
CPC分类号： H04B15/00 , H04B1/28
摘要： A double conversion tuner system is disclosed that avoids the problem of degraded performance as a result of radiated interferers. Several selection criteria are described for specifying the parameters of the tuner, including the nominal first or high intermediate frequency, a first local oscillator signal for each desired channel, a nominal second local oscillator signal, and a bandwidth of the first intermediate frequency.
摘要翻译：公开了一种双转换调谐器系统，其避免了作为辐射干扰源的结果导致性能下降的问题。描述了几个选择标准，用于指定调谐器的参数，包括标称第一或高中频，每个期望信道的第一本地振荡器信号，标称第二本机振荡器信号和第一中频的带宽。

4. 发明申请

US20140029747A1 SYSTEM AND METHOD FOR TRANSCODING CONTENT 审中-公开
标题翻译：用于TRANSCODING内容的系统和方法
公开(公告)号：US20140029747A1
公开(公告)日：2014-01-30
申请号：US13557595
申请日：2012-07-25
申请人： John P. Kamieniecki , Tat Keung Chan , Kevin T. Chang , Alexander Medvinsky
发明人： John P. Kamieniecki , Tat Keung Chan , Kevin T. Chang , Alexander Medvinsky
IPC分类号： G06F21/24
CPC分类号： H04N21/440218 , H04N21/4405 , H04N21/4408 , H04N21/4627
摘要： A system is provided for use with secure content in a first format. The system includes a conditional access device, a transcoding device and a media processor. The conditional access device is operable to receive the secure content and can generate a second secure content based on the secure content. The conditional access device can further provide the second secure content to the transcoding device. The transcoding device can transcode the second secure content into transcoded content of a second format, can secure the transcoded content as secure transcoded content and can provide the secure transcoded content to the media processor
摘要翻译：提供了以第一格式用于安全内容的系统。该系统包括条件访问设备，代码转换设备和媒体处理器。条件访问设备可操作以接收安全内容，并且可以基于安全内容生成第二安全内容。条件访问设备还可以向代码转换设备提供第二安全内容。代码转换设备可以将第二安全内容转码为第二格式的经转码的内容，可以将转码的内容保护为安全代码转换的内容，并且可以将安全的代码转换的内容提供给媒体处理器

5. 发明授权

US07039432B2 Dynamic upstream attenuation for ingress noise reduction 有权
公开(公告)号：US07039432B2
公开(公告)日：2006-05-02
申请号：US10309874
申请日：2002-12-04
申请人： Jay Strater , Dean Stoneback , Kevin T. Chang
发明人： Jay Strater , Dean Stoneback , Kevin T. Chang
IPC分类号： H04B7/01
CPC分类号： H04B1/109 , H04N7/102
摘要： A dynamic arrangement for reducing the presence of ingress noise in the upstream signal path of a two-way cable system utilizes a variable attenuation element and amplifier disposed along the upstream signal path. The amplifier includes a bypass switch so that the amplifier may be switched in to or out of the upstream path. A signal processor associated with the communications gateway functions to calculate the upstream loss present at the gateway and control the operation of the attenuation element, amplifier and bypass switch accordingly. Upstream attenuation is selected to be as large as possible, yet still allow in-building cable devices to communicate with their associated head end (HE) receiver equipment, after accounting for maximum transmit limitations.

6. 发明授权

US07742777B2 Dynamic upstream attenuation for ingress noise reduction 有权
标题翻译：进入噪声降低的动态上行衰减
公开(公告)号：US07742777B2
公开(公告)日：2010-06-22
申请号：US11364463
申请日：2006-02-28
申请人： Jay Strater , Dean Stoneback , Kevin T. Chang
发明人： Jay Strater , Dean Stoneback , Kevin T. Chang
IPC分类号： H04B15/00
CPC分类号： H04B1/109 , H04N7/102
摘要： A dynamic arrangement for reducing the presence of ingress noise in the upstream signal path of a two-way cable system utilizes a variable attenuation element and amplifier disposed along the upstream signal path. The amplifier includes a bypass switch so that the amplifier may be switched in to or out of the upstream path. A signal processor associated with the communications gateway functions to calculate the upstream loss present at the gateway and control the operation of the attenuation element, amplifier and bypass switch accordingly. Upstream attenuation is selected to be as large as possible, yet still allow in-building cable devices to communicate with their associated head end (HE) receiver equipment, after accounting for maximum transmit limitations.
摘要翻译：用于减少双向电缆系统的上行信号路径中的入口噪声的存在的动态布置利用沿着上行信号路径设置的可变衰减元件和放大器。放大器包括旁路开关，使得放大器可以被切换到或流出上游路径。与通信网关相关联的信号处理器用于计算网关上存在的上游损耗并相应地控制衰减元件，放大器和旁路开关的操作。上游衰减被选择为尽可能大，但仍然允许建筑物内的电缆设备在考虑到最大传输限制之后与其相关联的终端（HE）接收机设备进行通信。

7. 发明授权

US07680251B2 Prevention of an alarm activation and supporting methods and apparatus 有权
标题翻译：防止报警激活和支持方法和装置
公开(公告)号：US07680251B2
公开(公告)日：2010-03-16
申请号：US11225235
申请日：2005-09-13
申请人： Marlin F. McGregor , Kevin T. Chang , Ben M. Foose
发明人： Marlin F. McGregor , Kevin T. Chang , Ben M. Foose
IPC分类号： H04M1/24 , H04M3/08 , H04M3/22 , H04M1/00 , H04M9/00
CPC分类号： H04M1/7385 , H04M3/2272
摘要： A method and apparatus for preventing false alarm activation is provided. According to one embodiment of the invention, a determination (410) is made as to whether an instruction from a controller is a commanded reset, and control of a Subscriber Line Interface Circuit is taken (416) from a voice processor circuit when the instruction is a commanded reset.
摘要翻译：提供了一种用于防止虚假警报激活的方法和装置。根据本发明的一个实施例，确定（410）是否来自控制器的指令是否被命令复位，并且当指令为（416）时，从语音处理器电路获取用户线路接口电路的控制（416）命令重置。

8. 发明授权

US6072872A Determination of scrambling mode of a television signal 失效
标题翻译：确定电视信号的加扰模式
公开(公告)号：US6072872A
公开(公告)日：2000-06-06
申请号：US14088
申请日：1998-01-27
申请人： Kevin T. Chang , Alfred W. Stufflet
发明人： Kevin T. Chang , Alfred W. Stufflet
IPC分类号： H04N7/171 , H04N7/167
CPC分类号： H04N7/1716 , H04N7/1713
摘要： A signal such as an analog scrambled television signal in a cable television network has first scrambling mode data which is compatible with a first decoder population, but not a second decoder population. The scrambled television signal is processed to determine the scrambling mode without recovering the first scrambling mode data. Second scrambling mode data which is compatible with the second decoder population is then provided in the scrambled television signal, for example, in the vertical blanking interval or on an audio subcarrier. During processing to determine the scrambling mode, the television signal is delayed, e.g., by digitizing it and temporarily storing it in memory. The delay compensates for the time required to determine the scrambling mode. The television signal is recovered in the analog domain prior to inserting the second scrambling mode data. The system is compatible with various scrambling modes, including sync suppression and inversion of the active video as well as with dynamic scrambling mode changes.
摘要翻译：诸如有线电视网络中的模拟加扰电视信号的信号具有与第一解码器群，但不是第二解码器群的兼容的第一加扰模式数据。处理加扰的电视信号以确定加扰模式而不恢复第一加扰模式数据。然后，在扰频电视信号中，例如在垂直消隐间隔或音频副载波中提供与第二解码器群体兼容的第二加扰模式数据。在确定加扰模式的处理期间，电视信号被延迟，例如通过将其数字化并将其临时存储在存储器中。延迟补偿确定加扰模式所需的时间。在插入第二加扰模式数据之前，在模拟域中恢复电视信号。该系统与各种扰频模式兼容，包括有源视频的同步抑制和反相以及动态扰频模式的变化。

9. 发明申请

US20120159146A1 System and Method for Transcoding Content 审中-公开
标题翻译：用于转码内容的系统和方法
公开(公告)号：US20120159146A1
公开(公告)日：2012-06-21
申请号：US12973449
申请日：2010-12-20
申请人： John P. Kamieniecki , Kevin T. Chang
发明人： John P. Kamieniecki , Kevin T. Chang
IPC分类号： H04K1/00 , G06F21/00
CPC分类号： G06F21/10
摘要： A system is provided for use with secure content in a first format. The system includes a conditional access device, a transcoding device and a media processor. The conditional access device is arranged to receive the secure content and can generate second secure content based on the secure content. The conditional access device is can further provide the second secure content to the transcoding device. The transcoding device can transcode the second secure content into transcoded content of a second format, can secure the transcoded content as secure transcoded content and can provide the secure transcoded content to the media processor.
摘要翻译：提供了以第一格式用于安全内容的系统。该系统包括条件访问设备，代码转换设备和媒体处理器。条件访问设备被安排为接收安全内容，并且可以基于安全内容生成第二安全内容。条件访问设备可以进一步向代码转换设备提供第二安全内容。代码转换设备可以将第二安全内容转码为第二格式的经转码的内容，可以将转码的内容保护为安全代码转换的内容，并且可以向媒体处理器提供安全的转码内容。

10. 外观设计

USD562813S1 Enclosure for a wireless device 有权
标题翻译：无线设备外壳
公开(公告)号：USD562813S1
公开(公告)日：2008-02-26
申请号：US29245060
申请日：2005-12-16
申请人： William J. Storti , Kevin T. Chang , Barry P. Falvo , Paul Ocepek
设计人： William J. Storti , Kevin T. Chang , Barry P. Falvo , Paul Ocepek

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