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    • 1. 发明申请
    • Apparatus for, and method of, receiving satellite television signals in an apartment building and providing television images in the receivers in such building
    • 在公寓楼内接收卫星电视信号的装置和方法,并在该建筑物的接收机中提供电视图像
    • US20060271966A1
    • 2006-11-30
    • US11284098
    • 2005-11-21
    • Frederik StaalRobert HawleyKelly Cameron
    • Frederik StaalRobert HawleyKelly Cameron
    • H04N7/20H04N7/18
    • H04N21/23608H04L1/0045H04L1/0082H04L27/34H04L2001/0097H04N7/106H04N7/20H04N21/238H04N21/2383H04N21/4305H04N21/4382H04N21/6143
    • Digital packets, defined by a sync byte and then 130 MPEG2 compressed QPSK signal bytes, from a satellite transponder are reformatted prior to transmission to television receivers in apartments in a building wired to distribute video signals. A side byte between such sync and signal bytes in each packet indicates (a) any QPSK packet uncorrectable error and (b) processing information which allows automatic reconfiguration at the settop box. Additional FEC bytes correct to 8 errors within a MPEG2QPSK packet. The system removes the FEC bytes and reframes the MPEG2QPSK packets into a superpacket by converting a first number of the MPEG2QPSK packets to a second number of MPEG2QAM packets. An added sync byte indicates the beginning of each such MPEG2QAM packet. The system adds side data bytes including any uncorrectable errors in each MPEG2QPSK packet and adds a new, less complicated FEC to each MPEG2QAM packet. The system modulates and upconverts the bytes in each MPEG2QAM packet and passes them through a cable plant constructed to receive modulated QAM bytes (or NTSC signals) which are demodulated at the settop box. The additional FEC bytes correct to 8 errors within a MPEG2QAM packet and are then removed. The superpacket is deframed to obtain the MPEG2QPSK packets. After finding a television channel, the side bytes are processed to determine the frequency location of the other channels in the apartment receivers and the existence of uncorrectable errors. The MPEG2QAM bytes are decompressed and encoded to reproduce the television images in the apartment receivers.
    • 来自卫星转发器的同步字节和130个MPEG2压缩的QPSK信号字节定义的数字分组在传输到有线分配视频信号的建筑物的公寓中的电视接收机之前被重新格式化。 每个分组中的同步信号字节之间的边字节表示(a)任何QPSK分组不可校正错误和(b)允许在机顶盒自动重新配置的处理信息。 附加的FEC字节校正为MPEG2QPSK 分组内的8个错误​​。 该系统通过将第一数量的MPEG2 QPSK分组转换为第二数量的MPEG2 QAMAM分组来去除FEC字节并将MPEG2 QPSK分组重构为超分组, / SUB>数据包。 添加的同步字节表示每个这样的MPEG2 QAM 分组的开始。 该系统在每个MPEG2QPSK分组中添加包括任何不可校正错误的边数据字节,并且向每个MPEG2 QAM 分组添加新的较不复杂的FEC。 系统对每个MPEG2 QAM分组中的字节进行调制和上变频,并将它们通过构造成接收在机顶盒解调的调制QAM字节(或NTSC信号)的电缆设备。 附加FEC字节校正到MPEG2QAM 分组内的8个错误​​,然后被去除。 超级分组被去帧以获得MPEG2 QPSK 分组。 找到电视频道后,处理边字节以确定公寓接收机中其他频道的频率位置以及不可校正错误的存在。 对MPEG2QAM字节进行解压缩和编码以再现公寓接收机中的电视图像。
    • 3. 发明授权
    • Dynamo-electric machines
    • 发电机电机
    • US3949255A
    • 1976-04-06
    • US357708
    • 1973-05-07
    • Robert Smith BrownRobert Hawley
    • Robert Smith BrownRobert Hawley
    • H02K3/487H02K3/48
    • H02K3/487
    • A dynamo-electric machine provided with a retention mechanism for conductors disposed in a core slot is disclosed, wherein the mechanism comprises at least one composite wedge arrangement consisting of a first wedge having its wedge-shaped surface extending longitudinally of the slot, a second wedge similar to the first and also having its wedge-shaped surface extending longitudinally of the slot but disposed with its direction of taper opposed to that of the first wedge, there being further provided a spring member cooperating with the composite wedge arrangement, the spring member extending longitudinally of the slot and its deformation being dependent upon the relative longitudinal displacement in the slot of the first and second wedges.
    • 公开了一种设置有设置在芯槽中的导体的保持机构的发电机,其中所述机构包括至少一个复合楔形装置,所述至少一个复合楔形装置包括第一楔形物,所述第一楔形物具有沿所述狭槽纵向延伸的楔形表面, 类似于第一楔形结构,并且其楔形表面沿着槽的纵向延伸,但是以其与第一楔形件的锥形方向相反的锥形方向设置,还设置有与复合楔形装置配合的弹簧件,弹性件延伸 狭槽的纵向并且其变形取决于第一和第二楔形物的槽中的相对纵向位移。