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91. 发明专利

AU5252096A Non-interruptible tap and method 未知
公开(公告)号：AU5252096A
公开(公告)日：1996-10-08
申请号：AU5252096
申请日：1996-03-13
申请人： SCIENTIFIC ATLANTA INC
发明人： NAME NOT GIVEN
IPC分类号： H01R13/703 , H01R9/05 , H01R24/52 , H03H7/48 , H01R33/96
摘要： A method and system for distributing multimedia signals to a subscriber from a headend unit. The multimedia signals are transmitted on a network media as an RF signal. The RF signal is fed to an input terminal of a tap which has an RF circuit that splits the RF signal and distributes to an output terminal. The RF circuit splits the RF signals, and feeds the split signal to a plurality of connectors on the tap's front panel. The RF signals on the output terminal are fed downstream to a plurality of subscribers. A plate is placed in the tap such that when the RF circuit is removed for repair, maintenance or service, an electrical connection is maintained between the input and output terminal to prevent a disconnection of service downstream.

92. 发明专利

CA79030S HAND-HELD REMOTE CONTROL 未知
公开(公告)号：CA79030S
公开(公告)日：1996-09-06
申请号：CA79030
申请人： SCIENTIFIC-ATLANTA INC

93. 发明专利

AU3593695A Downloading television graphics and captions 未知
公开(公告)号：AU3593695A
公开(公告)日：1996-04-09
申请号：AU3593695
申请日：1995-09-19
申请人： SCIENTIFIC ATLANTA INC
发明人： AKINS GLEN L III , BANKER ROBERT O , LETT DAVID B
IPC分类号： G06F9/445 , G11C5/00 , H04N5/272 , H04N5/445 , H04N5/45 , H04N7/025 , H04N7/03 , H04N7/06 , H04N7/08 , H04N7/088 , H04N7/10 , H04N7/16 , H04N7/167 , H04N7/173 , H04N21/2743 , H04N21/41 , H04N21/418 , H04N21/431 , H04N21/443 , H04N21/472 , H04N21/4786 , H04N21/4788 , H04N21/488 , H04N21/6547 , H04N21/81 , H04N9/74 , G09G5/24 , G09G5/36 , G09G5/40
摘要： A method of downloading on-screen graphics and captions to a television terminal for display comprises a system manager computer and data transmission apparatus coupled thereto for transmitting program code, cube definition data and downloadable display commands to the terminal. Manufacturer intervention is minimized in that the system operator scans a graphic image to create a bit map and encodes the bit map into the cube definition data. The system manager also generates display control commands for downloading to the terminal without manufacturer intervention which control when, how long, where and how the graphic image is displayed. In this manner, a system operator may generate a custom screen for display representing their particular logo or service name. Moreover, screen data for different service names are addressably downloaded to different groups of subscribers to the different services. The program code, the cube definition data and the downloadable display commands may be globally or addressably downloaded via in-band video, in-band audio or outband data transmission. The output graphics for display may be accompanied by a predetermined audio signal.

94. 发明专利

AU2200695A Frequency agile broadband communications system 未知
公开(公告)号：AU2200695A
公开(公告)日：1995-10-23
申请号：AU2200695
申请日：1995-03-28
申请人： SCIENTIFIC ATLANTA INC
发明人： THOMPSON LEO J , RITCHIE JOHN ALEXANDER JR , DUBBERLY GREGORY THOMAS
IPC分类号： H04J1/00 , H04H20/79 , H04H20/81 , H04H60/96 , H04H60/97 , H04J1/12 , H04J3/16 , H04L12/28 , H04L12/413 , H04M3/00 , H04M7/00 , H04N7/10 , H04N7/173 , H04Q11/04 , H04N7/14 , H04N7/16
摘要： A broadband communications system for coupling telephony or other digital networks to a CATV network. The system transmits a multiplex of telephony signals in the forward band of the CATV network. Each forward channel is QPR modulated on a carrier and contains multiple subscriber telephony signals. The forward telephony channels are demodulated and demultiplexed by a plurality of subscriber terminals into the individual telephony signals directed to an addressed subscriber. Audio and control signals returning from the subscriber are digitized into standard telephony signals and QPSK modulated on a carrier onto the reverse band of the CATV network. The multiplicity of reverse band telephony channels are demodulated and multiplexed into a standard telephony signal which is directly interfaced to the telephony network. The reverse band modulators are frequency agile and modulate telephony signals from a subscriber in a selected one or more frequency subbands in the reverse band of the subscription network, so as to provide selectably changeable frequencies and selectably variable bandwidth in the reverse band commensurate with a selected subscriber communication feature. e.g. a single voice line, multiple voice lines, ISDN service, data communications services, security monitoring services, etc.

95. 发明专利

AU1295695A Method and apparatus for locating and tracking a qpsk carrier 未知
公开(公告)号：AU1295695A
公开(公告)日：1995-06-19
申请号：AU1295695
申请日：1994-12-05
申请人： SCIENTIFIC ATLANTA INC
发明人： SYLVA MARK J D , LAWRENCE STEVEN S , STROTHER-STEWART ROBERT
IPC分类号： H04L27/22 , H04B1/26 , H04L27/00 , H04L27/227 , H04L27/30
摘要： In a receiver for receiving a carrier modulated with data, there is provided a system for locating and tracking said carrier. The carrier is located by sweeping a frequency range containing said carrier. False lockup are inherent when a wide frequency sweep demodulator attempts to lock onto a carrier, and the system recognizes such lockups by monitoring data from a Viterbi error correction circuit. On false lockup, the system breaks the lockup and continues the sweep until the true data carrier is located and tracked.

96. 发明专利

AU6549194A Addressed messaging in a cable television system 未知
公开(公告)号：AU6549194A
公开(公告)日：1994-11-08
申请号：AU6549194
申请日：1994-02-16
申请人： SCIENTIFIC ATLANTA INC
发明人： BEYERS ROBERT J II , DURDEN GREGORY S , IVEY M KENT , KUBAN CURT M
IPC分类号： G06Q30/04 , H04H20/28 , H04H60/15 , H04N1/00 , H04N7/16 , H04N7/167 , H04N7/173 , H04N21/4786 , H04N21/4788
摘要： A method of transmitting addressed messages to subscribers comprises the steps of defining the group or individual subscriber to be addressed, creating the message, assigning the message to the individual or group to be addressed, scheduling the message for transmission, transmitting the message, and recording the transmission of the message. The message creating step further includes the steps of defining message attributes such as background color, creating sets of instructions for the subscriber, if required, setting a data field related to alerting the subscriber and compressing the data length of the message using a predetermined compression code. A system control computer, according to the present invention, comprises a billing computer interface for interfacing with a billing computer and a user interface for providing access to messaging services to a system operator, each of the billing and user interfaces for providing data to a group queuing subsystem and a system event scheduler, respectively. The user interface further accesses a database, the database shared by the system event scheduler and a message, device and group manager. The device manager in turn, when scheduled by the system event scheduler, coordinates the transmission of addressed messages via either a headend controller (via an inband channel) or an addressable data transmitter (via an out-of-band channel).

97. 发明专利

AU5575894A A multiplex control packet for digital services 未知
公开(公告)号：AU5575894A
公开(公告)日：1994-05-24
申请号：AU5575894
申请日：1993-11-01
申请人： SCIENTIFIC ATLANTA INC
发明人： WASILEWSKI ANTHONY J , LUCAS KEITH
IPC分类号： H04N7/025 , H04H20/28 , H04J3/00 , H04K1/02 , H04N7/03 , H04N7/035 , H04N7/08 , H04N7/081 , H04N7/167 , H04N7/173 , H04N7/20 , H04N21/222 , H04N21/2347 , H04N21/236 , H04N21/2362 , H04N21/2365 , H04N21/434 , H04N21/4405 , H04N21/6332
摘要： A plurality of digital services are carried in a multiplex data stream to a plurality of remote locations. The multiplex data stream comprises a continuous sequence of frames. Each frame comprises two consecutive fields, and each field comprises a plurality of lines. A first group of the lines in each field defines a transport layer region of that field, and a second group of the lines defines a service data region. Portions of the service data region of each field are allocated to respective ones of the video services in proportion to respective data rates of each service. A multiplex control packet is generated for each field that specifies, for each service, which portion of the service data region is allocated to that service. The multiplex control packet for each field is inserted into the transport layer region of that field along with a plurality of other packets that contain system related information. A multiplex map is generated and inserted in the first line of the transport layer of each field that specifies the number and location of packets within the transport layer. A multiplex map is transmitted with each field, and therefore, the number and location of packets within the transport layer may be dynamically adjusted on a per field basis. Additionally, the service allocation within the service data region of each field may be altered on a per frame basis to support statistical multiplexing.

98. 发明专利

AU5325394A Postdistortion circuit for reducing distortion in an optical communications system 未知
公开(公告)号：AU5325394A
公开(公告)日：1994-05-09
申请号：AU5325394
申请日：1993-10-08
申请人： SCIENTIFIC ATLANTA INC
发明人： PIDGEON REZIN E JR , RAND HEATHER H
IPC分类号： H03F1/32 , H04B10/158 , H04B10/17 , H04B10/18 , H04B10/06
摘要： A postdistortion network for a receiver at a receiver location in an optical transmission system is disclosed. The receiver converts an optical signal carried over an optical transmission link to an RF signal. The postdistortion network includes an input terminal for receiving the RF signal and a distortion generator for generating a distortion signal from the RF signal. An adjusting circuit for adjusts the phase and amplitude of the distortion signal based on distortion at said receiver location. The adjusted distortion signal is combined with the RF signal in order to cancel or substantially suppress distortion in the RF input signal. The present invention permits individual receivers in an optical transmission system to be compensated for distortion which may be unique to that receiver location. A communications system including a predistortion network and a postdistortion network is also disclosed.

99. 发明专利

AU3146493A METHOD AND APPARATUS FOR DISPLAYING CHANNEL IDENTIFICATION INFORMATION 未知
公开(公告)号：AU3146493A
公开(公告)日：1993-06-28
申请号：AU3146493
申请日：1992-11-30
申请人： SCIENTIFIC ATLANTA INC
发明人： ROBERT O. BANKER , KINNEY C. BACON , JULIUS B BAGLEY
IPC分类号： H04N5/445 , H04N5/50 , H04N7/081 , H04N7/088 , H04N21/41 , H04N21/472 , H04N21/485 , H04N21/488
摘要： A subscriber terminal includes a receiver for receiving a television signal including video, audio, and data information. A channel of the television signal may be selected for display on the television. A memory stores channel identification information such as channel identifiers. The channel identifiers include at least one display character. A processor establishes a relationship between channel identification information and channel numbers associated with channels of the television signal. An on-screen display control circuit controls the display of character information on the television and has the capability of overlaying the channel number and the channel identification information on the video portion of a selected channel displayed on the television for a predetermined period of time. Program identification information such as program titles may also be displayed. Alternatively or additionally, the channel identification information may be displayed on a display such an LED display of a subscriber terminal.

100. 发明专利

AU3225893A METHODS AND APPARATUS FOR COMMUNICATING PROGRAM DATA SIGNALS VIA A REMOTE CONTROL UNIT 未知
公开(公告)号：AU3225893A
公开(公告)日：1993-06-15
申请号：AU3225893
申请日：1992-11-19
申请人： SCIENTIFIC-ATLANTA, INC.
发明人： ALEX M. COOK JR. , LUIS A. ROVIRA , WILLIAM E. WALL JR. , LEE R. JOHNSON , LEO MONTREUIL , JEFFREY C. TING , CURT M. KUBAN , EMORY L. MCGINTY , DAVID E LEVITAN , RUENGUNG ARCHIE SHYU
IPC分类号： H03J1/00 , H04B1/20 , H04N5/44 , H04Q9/00

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