MXPA98008566A - A method and system for transmiting video / data signals from a device towards a network of connection of the communication network - Google Patents

Abstract

A system and method for the transmission of signals from a device to a connection card of the communication network. In particular, a return path is provided for the transmission of signals from a device to an interface where the signals are converted to an acceptable format for transmission to a connection card of the communication network. The signals are then transmitted to the card and / or can be transmitted to a unit of the optical network, thereby establishing a connection from the device to systems employing redópticas. One embodiment also provides a transport system for the supply of video signals to a device, for the return of analog signals from the device and for the transmission of digital signals to a signal destination. This mode includes a broadband communications module that receives video signals from a signal source and supplies the video signals to the device. The module also receives analog signals from the device and transmits the analog signals to an interface. The interface receives the analog signals, converts the analog signals to digital signals and transmits the digital signals to a red-optic unit or to a connection card of the communications network for further transmission to a signal destination.

Description

- A METHOD AND SYSTEM FOR TRANSMITING VIDEO / DATA SIGNALS FROM A DEVICE TOWARDS A CARD CONNECTION OF THE COMMUNICATIONS NETWORK Technical Field 5 The present invention relates to the field of data and video communications and, in particular, refers to the field of transmission of data and video signals from a device or a communications module. broadband to a network of communications and / or to a connection card of the communications network. BACKGROUND OF THE INVENTION Consider this example: You are at home, prostrate with a serious back problem. The only one thing that prevents your weak spirit from getting depressed is the pay-per-view movie that is shown on your television by the paid courtesy of your cable television service provider (CATV). The movie is over, but it is the first of a trilogy and you would really like it order and observe the sequel. But this is a huge job to achieve. With your serious back, it's going to be a big problem to get out of bed, to find the phone, remember and dial the pay phone number to see and return back to the position less uncomfortable than your back will allow to see the movie better.

Would not it be nice if you could just use a remote control unit with your television to request the supply of the second and third films? Therefore, what is the problem? The problem is that there is no cost effective transport system for the transmission of signals from a device (such as your fixed main equipment) to a signal destination (such as your CATV service provider, video server, etc.). ), so that you could order your next movie by simply using the remote control unit. Those skilled in the art will recognize the term "fixed main equipment" to refer to those elements of the device (whether placed within a fixed mainframe or not) that serve as an interface system between the device and the fiber and coaxial network that transports the signals. To understand the problems associated with ordering a movie through the use of the television remote control unit, a general description of the CATV service is provided by reference to Figure 1. Figure 1 is a block diagram of a system for the supply of video signals. Generally, the supply or transmission of a set of data and video signals from a video signal source (such as a CATV service) to a device (such as its fixed main equipment) is referred to as a "downstream" supply. , a "downstream path" or a "path in advance". As illustrated in Figure 1, a downstream path 5 generally has its start in a video signal source 10 that transmits a set of video signals to an optical transmitter 12. For ease of explanation, the term "optical transmitter" it is used in the present to include the elements or mechanisms that receive the video signals from the video signal source 10, which converts, modulates, carries, amplifies and / or separates the video signals (as necessary) to transport optically the signals from the video signal source 10 to one or more local distribution units, such as the broadband communications module 14. A broadband communications module is also referred to as an analog video unit, a analog network unit, an optical receiver or in some cases, as an optical node. A broadband communications module 14 typically converts optical video signals to electrical signals and transmits video signals through a bandpass filter 15 through a coaxial cable to a relatively large number of devices. One such device is device 16, which is also referred to as a fixed main equipment, local controlling unit, cable available TV or residential access. The transmission of a set of video signals from a wideband communications module 14 through a coaxial cable to a device 16, is referred to as a "lowering". In this way, Figure 1 illustrates a downstream path 5 for the transmission of a set of video signals from a video signal source 10 to an optical transmitter 12, to a broadband communications module 14, towards a filter 15 and for the final descent to a device 16. The downstream path 5 has generally been described in the context of the provision of a movie to the subscriber television, but the description is also applicable to another supply of data or video signals such as a broadcast television or video, upcoming video on demand, Internet access, interactive shopping and similar supply services. For example, a video signal source may include a video server, a modulator, an antenna head system or a content provider. A device may include a personal computer, a fixed main device, a digital receiver, a local controlling terminal or an access. Generally, the supply or transmission of a set of data or video signals from a device to a video / data signal destination is referred to as an "upstream" supply or a "return path". As illustrated in Figure 1, a return path 20 generally has its start in a device 16 that transmits a set of data or video signals through a coaxial cable to a bandpass filter 15. Typically, the filter it recognizes the signals as signals from the return path and transmits the signals to other elements or mechanisms for the final supply to their destination. As will be described in more detail below, Figure 1 illustrates a return path 20 for the transmission of a set of video signals from a device 16 to a filter 15 (with the amplification of the return path), towards a laser of the return path of Fabry-Perot 22, to a concentrator of the return path 24, to a central processing station 26 and for the final supply to a video / data signal destination 28. The return path 20 is it has generally been described in the context of the request for a movie from the subscriber's television, but the description is also applicable to another supply of data or video signals from a source such as, a video channel selection, the impulse view payment requests, purchase requests and enhanced video control signals to stop, reverse or accelerate control of the registration of a source of data or video. In the above description of a downstream path 5 and a return path 20, reference was made to elements such as the video signal source, etc., but the current mechanism for transporting the data or video signals between The elements are not explained clearly in all cases. This omission was deliberate to provide a brief historical exposition on this point. In the early days of cable television, CATV service providers used coaxial cable as the mechanism to transport video signals from the video signal source to the device. Hence the term "cable company". But coaxial cable has its limitations as a transport mechanism and cable companies soon realized the advantages offered by optical fibers for the transport of video signals. Most of the CATV service is now provided through a fiber and coaxial network, which is a hybrid network that provides simple data and video circuits and simple broadband channels to the public. Optical fibers are used to transport the signal from a video signal source to local distribution points, such as the broadband communications module 14 illustrated. At such a local distribution point, the signal currents are converted from optical signals to electric signal currents and distributed ("down") to individual homes through a shared coaxial cable. The CATV service providers realized the potential of optical fibers for the transport of video / data signals and provided the fiber and coaxial networks for the path downstream of the video signal supply. But, for the most part, CATV service providers have so far ignored and failed to provide a signaling return path for video / data signals. Fiber and coaxial networks were not generally established to handle video / data signals that were transmitted from a device 16 (such as its fixed main equipment), back through optical transmitter 12 to the video signal source 10. One reason why the CATV service providers (and others) ignored the signaling return path is that, until now, there was a small possibility that a subscriber had the information to transmit via a return path. In its early days, CATV was developed for subscribers who lived outside the reach of broadcast stations. These first subscribers paid a fixed fee for the service. A signaling return path was not necessary. Another reason why CATV service providers (and others) ignored the return path is based on the economy. Alterations or additions to a fiber and coaxial network to provide a signaling return path have not been justified in cost for many reasons. For example, the alterations and additions proposed would be extensive and expensive. In addition, until now, it has been believed that even with "payment services to see", a subscriber will only have a small amount of information to transmit through the return path. In this way, the cost did not justify the changes that were necessary. But times have changed. The personal computer has changed the attitude of the public. Research has shown that most Americans can not imagine living without a personal computer. Through a personal computer, a user has access to all types of information. Through mechanisms such as local area networks, wide area networks, the Internet and others, a user is able to interact with others who are in the network and interact with computer programs, information and services. In other words, with a computer connected to the network, a user has a "downstream path" for the reception of information and a "return path" for the transmission of information. Having been educated, through computers connected to the network for the advantages of information exchange, a user is unexpectedly discouraged when he finds that the CATV service is generally only "unidirectional" that is, only downstream trajectory. There is no economic return path, efficient, convenient. What a Neanderthal! Within a few years, the need for bidirectional, multichannel video / data transmissions will multiply within each home and business due to the incoming integration of video / data information into business management, learning process and others. aspects of life in the twenty-first century. Synchronous Return Path System At least one company has given some idea for the provision of a signaling return path in a fiber and coaxial network: Synchronous Group, Inc., San José California. Synchronous has a return path system that includes a product known as a single local receiver or a residential unit multiple receiver. The Synchronous system is explained in relation to figure 1. Generally, in the Synchronous return path system, a set of analog video / data signals are received from the device 16, converted from electrical to optical signals and transmitted to the video / data signal destination 28. If necessary , the signals are converted from analog to digital only at the video / data destination 28 or as a relatively final stage in the transmission of the signals to the video / data destination 28. As described more particularly, the system Synchronous's return path works in conjunction with the standard equipment provided in relation to the mechanisms that adapt the CATV service. For example, a device (such as its fixed main equipment) is typically equipped with a radio frequency modem that outputs the digital signals with an analog modulated bit stream in Quaternary Face Shift Transmission (QPSK) or similar format. Typically, the modem is part of the fixed main equipment. In the return path, the signals leave the main fixed equipment at a frequency between five to forty MHz in the coaxial cable that goes down to a filter 15. In figure 1, the filter 15 is shown as a separate block of the communications module broadband 14, but generally, the filter is incorporated as part of such module 14. In the broadband communications module, signals from hundreds of devices can be combined and amplified. Typically, the amplification is carried out in a return path amplifier (not shown). This combination and amplification leads to the introduction of a lot of noise, thus distorting the signals. As illustrated in Figure 1, after the signals are combined and amplified, they are transmitted to a Fabry-Perot 22 return path laser. The laser is used to convert the combined signals from electrical to optical signals. It would be extremely inexpensive to provide a fiber for transport, only of these combined converted signals received just from the device 16 or group of devices served by a single broadband communications module 14. In this way, to decrease the cost of the path system of return, the combined combined signals are generally modulated and passed to a return path concentrator 24. In the return path concentrator 24, the converted, combined and modulated signals are further modulated with all the signals that have been sent for the transmission along the return path at that moment. These signals are modulated in 55-600 MHz of spectrum and transmitted to the central processing station 26. In the central processing station 26, the signals are converted from optical to electrical signals and demodulated in their five-bandwidths to Forty MHz respectively. After eta demodulation, the signals are provided to their respective video / data signal destinations. At this point, the signals can also be converted from analog to digital. A destination can be a local area network, such as a selected Ethernet. In that case, the signals can be routed to an Ethernet card for connection and addressing according to an Ethernet procedure to an additional destination. The Synchronous Group is being entrusted with its vision, to develop a return trajectory system. But this system has disadvantages. As noted, the combination of a large number of sets of video signals leads to the introduction of noise and results in signal distortion. Electronics must be provided to adjust and compensate for noise. This electronics by itself can present problems by the introduction of noise, by mistake, by malfunction, etc. Needless to say, such electronics can be expensive to design and perform, to install, to establish to work optically, to maintain and replace. In this way, these electronics can significantly raise the cost of a broadband communications module and its use, above the level that the market can allow for return trajectory services. Another disadvantage of the Synchronous return path system is the use of the Fabry-Perot return path laser. Such a laser is relatively expensive in the context of return trajectory CATV services for a small number of subscribers. If such a laser is necessary for each broadband communications module, then the Synchronous system is too expensive for commercial use. As additional disadvantages to the Synchronous system, the same criticisms leveled at the system in relation to the possible problem, expense, maintenance, repair and adjustment of the extra electronics in the broadband communications module, can be said in relation to the use of the laser Fabry-Perot return path 22, the return path concentrator 24 and the adjusted or extra elements necessary to adjust the Synchronous system in each central processing station 26. In addition another disadvantage of the Synchronous return path system is which requires the demodulation of each individual 5-40 MHz return trajectory in some central location. This demodulation is necessary before switching to a local area network, wide area network or Ethernet router. Demodulation costs are a large part of the costs in a return path system. Another disadvantage of the Synchronous return path system is that it is a similar transmission system. The signals coming from the device 16 are transmitted analogously until approximately the end of their journey. In this way, there is little possibility or opportunity to sample the signals or otherwise set them apart in a way useful for use with other systems and / or elements. In other words, to supply video / data signals along the Synchronous return path system to a selected Ethernet destination, the video / data signals must pass the full return path from the device 16, to the broadband communications module 14, the Fabry-Perot 22 return path laser, the return path concentrator, the central processing station 26 and only then to the selected Ethernet destination 28. Along the way, the signals can be lost, distorted, etc. Opportunities presented by the Telecommunications System As noted above, research has shown that most people can not imagine living without a personal computer. Still, it can be assumed that, a greater number of people can not imagine living without the telecommunications service they expect. We are not talking about phones. We are talking about interactive communication lines that include conventional telephone service, facsimile service, integrated services digital network (ISDN) and other data and digital services that include connections to the Ethernet. We are talking about a system that allows interaction between people, between people and computers (or other mechanical devices) and between computers (or other mechanical devices). With the innumerable possibilities of communication that are provided through the telecommunications network, it is a significant disadvantage that the CATV services do not provide any kind of a practical and economic connection to the telecommunications network. This is a failure shared by the Synchronous return path system. In summary of the background, the service of CATV is impeded in the communications field by its failure generally to provide a user with a way to send information along a return path from the user's device to a video / data signal destination. The Synchronous system offers a return path for video / data signals, but only in a way that includes additional elements that add costs, installation, maintenance and failures that concern the system. In addition, the Synchronous system has a significant disadvantage in its transmission of the video / data signals in a similarly modulated fashion along the return path. According to the above, there is a need in the art for a system that provides a return path for the transmission of video / data signals from a device to a video / data signal destination. In particular, there is a need for a system that provides a return path that is relatively inexpensive to establish, that works well with a minimum of equipment and a minimum of modification to the standard elements and that is easy for maintenance and service. Especially, there is a need for a system that provides a return path that minimizes the impact of noise on signal transmission. In addition, there is a need for a system that provides a return path so that a connection can be made to the telecommunications network or other communication network. Finally, there is a need for a system that provides an interface system that converts the analog signals received through a coaxial cable interface from a device to digital signals that are appropriate for communication with other networks, such as Ethernet. SUMMARY OF THE INVENTION The present invention satisfies the needs in the matter. As generally stated, the present invention allows a connection between: (1) the downstream path of a video / data signal transmission system from a signal source to a device; and (2) the return path from the device to a signal destination. With this connection, the range of broadband services that is available to a subscriber is greatly expanded. The present invention allows for the effective cost of providing digital and analog video services and the integrated provision of high bandwidth data communications and communications services. Still as set forth in general, the present invention provides a return path for the transmission of signals from a device to a signal destination. This return path minimizes signal distortion. In the preferred embodiment, an interface is provided so that analog signals transmitted through a coaxial cable interface from the device to a broadband communications module are converted to digital signals. In digital form, the signals can also be formatted as appropriate for additional communication with any broadband amplitude communications network. The signals can be formatted in the connection format of the communication network for transmission to a connection card of the communication network, such as an Ethernet card. The signals can also be transmitted to an optical network unit, thus connecting the broadband communications module to the systems employing the optical networks. As set forth more particularly, a first embodiment of the present invention is a signal transport system for the supply of video signals to a device for the return of analog signals from the device and for the transmission of digital signals to a destination of signal. This mode includes a broadband communications module that receives the video signals from a signal source and supplies the video signals to the device. The broadband communications module is also effective to receive analog signals from a device and to transmit the analog signals to an interface. The interface receives analog signals, converts analog signals to digital signals and transmits digital signals to an optical network unit. The optical network unit also transmits the digital signals to a signal destination. In the preferred embodiment, the broadband communications module includes an optical receiver that receives the video signals from the signal source and transmits the video signals to a filter. The filter transmits the video signals to an interface of the coaxial cable, which, in turn, transmits the video signals to the device. With respect to the reception of analog signals from the device, the broadband communications module preferably includes an interface of the coaxial cable that receives the analog signals from the device and transmits the analog signals to the filter. The filter then transmits the analog signals to a converter and the converter converts the analog signals to digital signals. Preferably, the converter formats the digital signals into a connection format of the communication network and the converter transmits the digital signals in the connection format of the communication network to a connection card of the communication network. The connection card of the communication network can be adapted for use in the optical network unit and can transmit the digital signals to an optical receiver / transmitter or a communication network. In addition, the present invention may include an alarm monitoring system, so that monitoring may occur from a radio frequency output alarm or an optical signal alarm with respect to the video signals supplied to the device. The present invention may also include a control device such as an ignition device or a shutdown device with respect to the video signals supplied to the device, whereby said video signals may, respectively, be turned on for delivery to said device. device or shut down for the supply to said device. Further, the present invention may include a drop test unit for testing the electrical characteristics of the video signals or for conducting a continuity check with respect to the video signals. The present invention also provides a mode that is a signal transport system for the reception of analog signals from a device and for the transmission of digital signals to an optical network unit. This mode includes a broadband communications module for receiving analog signals from the device and for transmitting the analog signals to an interface. The interface converts the analog signals into digital signals and transmits the analog signals to an optical network unit. Preferably, in this embodiment, the interface is effective for converting the analog signals into digital signals in a connection format of the communication network and for transmitting the digital signals in the connection format of the communication network to a connection card of the communication network. the communications network. The interface can be adapted for use in the broadband communications module, such as the connection card of the communications network. In addition, the present invention provides a mode that is a signal transport system for the reception of analog signals from a device and for the transmission of digital signals to a connection card of the communication network. The system includes an interface that receives the analog signals, which converts the analog signals into digital signals in a connection format of the communication network and which transmits the digital signals in the connection format of the communication network to the connection card "of the communication network The interface or connection card of the communication network can be adapted to be used in the device., the interface or connection of the communication network can be adapted for use in a broadband communications module. In still another embodiment, the present invention provides a method for transmitting signals from a device to a connection card of the communication network in a signal transport system. According to the method, the analog signals are received from the device, converted into digital signals in a connection format of the communication network and transmitted to the connection card of the communication network. Preferably, in this method, the video signals are supplied to the device from the signal source. In addition, a radio frequency output alarm or an optical signal alarm can be monitored with respect to the video signals supplied to the source and the monitoring results reported to an alarm monitoring system. In addition, a control device can be implemented with respect to the video signals supplied to the device, with the control device being an ignition device or a shut-off device, by which the video signals can, respectively, be turned on for the supply to the device or shut off for delivery to the device. Also, a drop test unit can be implemented with respect to the video signals supplied to the device. The drop test unit can test the electrical characteristics of the video signals or conduct a continuity check with respect to the video signals. Advantageously, the present invention allows a connection between CATV type services and communication services. In particular, the present invention allows a connection between, on the one hand, CATV type services in the downstream path of the transmission of video / data signals to a device and, on the other hand, the communication type services in the return path of the transmission of video / data signals from the device. With this connection, the range of broadband services that are available to a subscriber is greatly expanded. In particular, the return path of the video / data signal transmission can include optical networks, such as fiber networks in the circuit, thus providing the subscriber with higher bandwidth capacity communication services. As a further advantage, the present invention increases the value of communication systems that are linked to CATV type services. For example, an optical network that includes a fiber system or network in the circuit becomes more valuable because of the connection provided by the present invention, because the optical network is capable of providing enhanced and additional services. One such service that can be provided is a connection to the public switched telephone service through a POTS card in an optical network unit. Another service is a connection to another communication network such as an Ethernet system, through an Ethernet card. Yet another service is that a service provider may activate, terminate, alarm, verify or test the service provided to one or more subscribers from the optical network through the connection provided by one embodiment of the present invention. In particular, the present invention is improved above the Synchronous return path system and similar systems, in that the present invention eliminates much of the electronics required for traditional upstream communication such as, return path amplifiers, transmitters return path laser, return path receivers and return path demodulators. Therefore, it is an object of the present invention to provide an interface system and method improved for transmitting data and video signals in a return path from a broadband communications module to an optical network. It is also an object of the present invention to provide an improved return path that minimizes the signal distortion of the signal transmission. It is a further object of the present invention to provide for the conversion of the analog signals to digital signals in the return path to allow the transmission of signals to any broadband amplitude communication network. furtherIt is an object of the present invention to provide an interface, so that analog signals transmitted from a device through a coaxial cable interface to a broadband communications module are converted to digital signals. Furthermore, it is an object of the present invention to provide an interface, so that analog signals transmitted from a device can be converted to digital signals for further transmission to a connection card of the communication network. The present invention and the preferred embodiments thereof overcome the disadvantages set forth above and achieve the objects of the invention set forth herein, which will be apparent from the following detailed description of the following preferred embodiments. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram of a video signal supply system including the downstream supply from a video signal source to a device and the upstream supply from the device to a destination of video signal. Figure 2 is a block diagram of the preferred signal transport system including the downstream supply from a video signal source to a device and the upstream supply from the device to a video signal destination. Figure 3 is a block diagram that includes more detail of the preferred conditions of the signal transport system, illustrated in Figure 2. Figure 4 is a block diagram that includes more detail of certain elements of the signal transport system preferred, illustrated in figs. 2 and 3. Figs. 5A and 5B are block diagrams of alternate embodiments of the signal transport system of the present invention. DETAILED DESCRIPTION Referring now to the drawings, in which similar numbers indicate similar elements throughout all the various figures, the embodiments of the invention will be described in detail. A Summary of the Present Invention in its Preferred Conditions A summary of the present invention is described in relation to the simplified block diagram of Figure 2. In particular, Figure 2 illustrates the preferred signal transport system that includes water supply down from a video signal source 10 to a broadband communications module 14 and to a device 16. Figure 2 also illustrates the preferred return path from the device 16 to the broadband communications module 14, towards a interface 30, to an optical network unit 32 and finally, to a video signal destination 34. In the preferred embodiment, the video signals are transmitted, but it will be appreciated that the data signals can be transmitted in the same manner. Figure 2 also illustrates a bidirectional connection for the transport of the signals between the optical network unit 32 and the telephone 33, where the telephone 33 represents conventional telephones, cordless telephones, modem connections and any other telecommunications device. Typically, the telephone 33 and the device 16 will be located in the same place, such as in the subscriber's office or home. According to this preferred embodiment, in the downstream supply, a video signal source 10 provides video signals. As used herein, a video signal source is used with the same meaning with the terms "signal source", "content provider" or "antenna head system". Those skilled in the art will recognize that a content provider is generally a signal originator. On the other hand, an antenna head system can originate signals or receive signals from other sources, such as those coming from satellite transmissions, aerial transmissions of signals in the air or digital video transmissions. An antenna head system generally modulates the video signals at a particular frequency, typically a radio frequency overlay (RF). In this way, as used herein, the term "video signal source" includes innumerable types of signal or content providers that include, CATV service providers, video servers and the like. For simplicity, the figures herein only illustrate a single video signal source 10, but it will be appreciated by those skilled in the art that more than one video signal source can serve a broadband communications module, a device or a particular subscriber. The description herein as to the illustrated video signal source 10 is also applicable to other sources. Generally, the signals that are provided by means of the video signal source 10 are video signals in analogous form. Referring to Figure 2, the interruption in the transmission line between the video signal source 10 and the broadband communications module 14 indicates that other elements may be present between these two elements, but are not shown in the drawing. . Some of these omitted items are described in more detail in relation to Figure 3 below. In the preferred embodiment, the broadband communications module 14 is the single local receiver of the Synchronous group of the multiple receiver of the residential unit of the Synchronous group. This Synchronous product can be modified as explained herein to incorporate the functions of the present invention. Alternatively, these functions may be provided separately or as part of another element such as the device or the optical network unit. Other broadband communications modules are available from Scientific Atlanta, Norcross, Georgia; ADC, 999 Research Parkway, Meriden, Connecticut; CCOR Electronics, Inc., State College, Pennsylvania; and General Instruments, Harboro, Pennsylvania. For simplicity, the figures herein only illustrate a single broadband communications module. It will be appreciated by those skilled in the art that the video signal source 10 can send and typically send signals to multiple broadband communications modules. The description herein as well as the illustrated broadband communications module 14, is also applicable to these other units. The preferred broadband communications module is also described in more detail in relation to Figure 4 below. From the video signal source 10, the broadband communication module 14 receives the signals intended for the device 16 and in a conventional manner, the broadband communications module supplies the signals to the device. Typically, the broadband communications module supplies or "lowers" signals to the device through the use of a coaxial cable. For simplicity, the figures herein only illustrate a single device 16. It will be appreciated by those skilled in the art that the broadband communications module 14 can send and typically send signals to multiple devices.

As discussed below in relation to Figure 3, the preferred broadband communications module serves one to eight devices. The description herein with respect to the illustrated device 16 is also applicable to these devices. With the signals received from the broadband communications module 14, a subscriber can have a movie supplied from the video signal source 10 through the broadband communications module 14 to his television 16. In this example , device 16 has been defined as a television. However, as used herein, the term "device" is understood to have a broader definition and comprises other devices that can receive and transmit signals such as, a fixed main equipment, a personal computer equipped with a video card or a local video terminal. With respect to the return path, in the preferred embodiment, the device 16 provides signals to the broadband communications module 14. Preferably, these signals are analogous signals (and in particular, analog signals modulated since the analog signals include digital content). ) transmitted from the device 16 through a coaxial cable interface (ie, again through the "down") to the broadband communications module. The broadband communications module 14 then transmits these signals to an interface 30. It is provided in relation to Figure 4 below, more detail considering the interface. The interface 30 receives the signals from the broadband communications module and converts the signals into a converted set of signals. Preferably, analog signals are converted to digital signals. The signals are then transmitted to an optical network unit 32. As used herein, an optical network unit is a terminal element in an optical communications network since an optical network unit generally connects one or more telecommunication devices. (such as telephone 33) through conventional twisted pair telephony, towards the optical network. The term "optical network unit" is used herein in accordance with the definition thereof found in the following BellCore document: General Requirements and Objectives for Fiber in the Loop Systems, TR-NWT-00909, issued on Io December 1991. This document is incorporated herein by reference. For simplicity, the figures herein only illustrate a single optical network unit 32, but it will be appreciated by those skilled in the art that more than one optical network unit may be present within the system and that each optical network unit may serve to more than one device. The description herein as to the illustrated optical network unit 32 is also applicable to these other units. In the preferred embodiment, the optical network unit is a Digital Intelligent Subscriber Carrier System Fiber (DISC * S) in the Loop CAD 12 optical network unit manufactured by RelTec, Franklin Park, Illinois. Additional details that consider the optical network unit 32 are provided in relation to Figure 4 below. After the reception of the converted signals, the optical network unit 32 is also effective to transmit the converted set of signals to a signal destination 34. For simplicity, FIG. 2 only illustrates a single signal destination 34, but will be appreciated by those skilled in the art that the optical network unit can provide the converted signals to more than one signal destination. The description herein as to the illustrated video signal destination 34 is also applicable to other destinations. Also, as used herein, a signal destination may refer to any of the many types of destinations to which the signals may be transmitted for any reason. For example, a sigdestination may include a CATV service provider, a persocomputer, other computers, a video server or other servers or video selection controller. Referring still to Figure 2, the interruption in the transmission line between the optical network unit 32 and the video sigdestination 34 indicates that other elements may be present between these two elements, but are not shown in this drawing. For example, such an omitted element may be the transport mechanism, such as the fiber network in the circuit (FITL), which carries the sig from the optical network unit 32 to the destination of the video sig34. Some of these omitted elements are described in more detail in relation to figure 3 below. To summarize the general summary of the preferred return path of the present invention, a user or subscriber can use the device 16 to transmit the sig (preferably agues modulated with digital content) to the broadband communications module 14. For example, The subscriber can order a movie using the remote control unit and the television. In response to the reception of the sig, the broadband communications module 14 then transmits these sig to an interface 30, which converts the sig (preferably from ag to digital) and also transmits the converted sig to an optical network unit 32. In turn, the optical network unit transmits the sig to a video sigdestination. To use the example of the film again, the sig for ordering the film are received by the broadband communications module, converted to digital sig by the converter and sent to the CATV service provider through the network unit. optics 32. The Optical Transmitter in the Downstream Path In the supply of digital sig, the CATV industry is moving towards the fiber optic installations deeper and deeper into the hybrid network. In other words, the hybrid network becomes a less hybrid and more optical network. The majority of the CATV industry has stopped the deployment of fiber in 2000 homes per local distribution unit. But some of the players in the CATV industry have transported the deployment of the fiber to the local distribution units in such a way that each unit serves 500 households or even only 125 households. A particular company, the Synchronous Group has developed a downstream trajectory system that pushes down the penetration of fiber into a very small number of homes (it can be as little as one to eight) and is still economical. The mentioned Synchronous system includes the local sigreceiver or the multiple receiver of the residential unit mentioned above. The additioinformation considered by this Synchronous system can be obtained from the Synchronous Group. This Synchronous system is generally described below, in connection with a description of the preferred optical transmitter 12. As described above, the term "optical transmitter" is used herein to include the elements or mechanism that receive the video sig coming from of the video sigsource 10, which convert, modulate, carry, amplify and / or separate the video sig (as necessary) to optically transport the sig from the video sigsource 10 to one or more video units. local distribution, such as the broadband communications module 14. In the preferred embodiment, the optical transmitter comprises the Synchronous system referred to above. This Synchronous system includes an extery modulated 1550 nanometer optical transmitter and a cascade of high performance Erbium mixed fiber amplifiers.

(EDFAs) to amplify the optical video signals for the supply to one or more local distribution units. The use of high performance amplifiers provides a high optical separation ratio in the supply of video signals so that a single broadband communications module can serve as few as one to eight devices (also referred to as real units) and so that multiple broadband communications modules can receive signals from a single EDFA location. By decreasing the number of devices served by the broadband communications module to as few as one to eight devices, an optical network for video supply is economical when compared to a conventional coaxial cable and an amplifier network. Figure 3 is a block diagram that includes more detail of the preferred embodiment of the preferred signal transport system, as illustrated in Figure 2. In particular, the multiple transmission lines from the optical transmitter 12 to the communications module Broadband (BCM) 14 and other BCMs indicate that video signals can be provided to one or more broadband communications modules. In addition, Figure 3 illustrates that the broadband communications module 14 transmits and receives signals to and from one or more 16A-16G devices. The Optical Network in the Return Trajectory As discussed above in relation to the preferred return path of the present invention, after the optical network unit 32 receives the converted signals from the interface 30, the optical network unit 32 is effective to transmit the signals to one or more video signal destinations 34. Under the preferred conditions, the optical network unit 32 can transmit the converted signals to an optical network 36. It will be appreciated by those skilled in the art that the unit The optical network 32 can be adapted as part of the optical network 36, instead of as a separate unit. Preferably, optical network 36 is an optical fiber network in the circuit (FITL), which can carry signals to provide conventional telephone services, facsimile service, integrated services digital network (ISDN) and other data and digital services that include connections to the Ethernet. From the optical network 36, the signals can also be transmitted to one or more video signal destinations 34. For example, the signal destinations that can be connected to the optical network 36 include: video control networks, data networks private and signaling networks. Also, from. the optical network 36, the signals can also be transmitted to the public switched telephone network 38. Advantageously, through the inclusion of an optical network in the return path, a user can send signals coming from a device along a path of return including, a broadband communications module, an optical network unit, an optical network and towards video signal destinations, such as the public switched telephone network. Description of the Interface In the general description of the preferred return path of the present invention, it was explained that the broadband communications module preferably receives analog signals modulated that carry the digital content coming from the device 16. The band communications module Wide 14 then transmits these signals to an interface 30 where the analog signals are demodulated to digital signals and then transmitted to an optical network unit 32. Additional details regarding the preferred broadband communications module, the interface and the optical network unit, are now presented in connection with Figure 4. First reference is made to Figures 2 and 3 wherein the interface 30 is illustrated as a separate functional block of the broadband communications module 14 and the optical network 32 In the preferred mode, there is no separate element comparable to the interface block 30. Preferably, the functions of an interface between the broadband communications module and the optical network unit are provided by certain functions carried out in the broadband communications module. and for a smaller extent, in the optical network unit, as described below. Alternatively, as described below in relation to Figure 5A, the functions of the interface may be incorporated as part of or associated with the device or with the optical network unit. Figure 4 illustrates certain components of the preferred broadband communications module 14. In particular, it will be appreciated that the broadband communications module 14 receives the analog modulated signals from the video signal source 10 in the optical receiver 40. Analog signals are transmitted on a frequency between 55-860 MHz and can be transmitted on a frequency as high as 1 GigaHz. These signals are passed to a filter 42, which preferably is a bandpass filter and in particular, is a diplex filter. In a conventional manner, the filter 42 passes the analog signals to an interface of the coaxial cable 44 for further transmission to the device 16. With respect to the return path, the device 16 (or devices) transmits the analog signals to the interface of the coaxial cable 44. In an alternate embodiment, the interface of the coaxial cable 44 may be provided with multiplexed signal inputs / outputs (RF combiner / separator), such that if more than one signal of the same type is received, then these signals may be combined for processing. The interface of the coaxial cable 44 can also be referred to as a "receiver" in the sense that it is a receiver of signals from the device 16. From the interface of the coaxial cable 44, the signals (single or multiplexed) are transmitted to the filter 42. Preferably, the analog signals coming from the device 16 are sent on a frequency between 5-40 MHz and in the preferred embodiment, on a frequency of 15.45-17.756 MHz. After the reception of analog signals from the cable interface coaxial 44, the filter 42 transmits the signals to a demodulator / converter 46. In the preferred embodiment, the demodulator / converter is a QPSK demodulator for the Ethernet converter. In the demodulator / converter 46, the signals are preferably converted to digital signals and in particular, converted to digital signals in an Ethernet format such as T Base 10 or F Base 10. As those skilled in the art will understand, the signals received from the device in the demodulator / converter 46, it is preferably combined with signals from other devices for transmission to one or more signal destinations. The signals coming from more than one device are combined passively in the upstream connection through the diplex filter. After conversion, the converted signals are preferably passed to the optical network unit 32, in a manner well known to those skilled in the art. In the preferred embodiment, the converted signals are passed to one or more communication networks through one or more connection cards of the communication network 48. The connection card of the communication network of choice is an Ethernet card preferably adapted for inclusion in the optical network unit 32. An Ethernet card is a popular and relatively inexpensive communication network connection card. Such an Ethernet card can be obtained from Reltec, Franklin Park, Illinois. Those skilled in the art will recognize that other connection cards of the communications network may also be used or in substitution thereof. Advantageously, the conversion of the signals to digital format and the provision of the digital signals to a connection card of the communication network 48 allows the signals to be conveniently transmitted to one or more signal destinations. For example, from an Ethernet card, the signals can be transmitted in a manner well known to those skilled in the art, to an Ethernet 50 router (also referred to as a signal destination). In this way, the subscriber or user of the device 16 is able to communicate through the preferred return path with the signal destinations such as the Ethernet router 50. It will be appreciated that the provision of the digital signals towards the Ethernet router 50 (or other communication network connection) in the Ethernet format (or other format of the communication network), will allow the signals to be interfaced directly with an Ethernet router (or other router) without the need for electronic or additional elements. By avoiding the use of electronics or additional elements, the present invention provides a reliable, convenient and economical system for communications between a device and a signal destination through the use of a connection between a broadband communications module and a unit. of optical network. As seen, the signals converted from the demodulator / converter 46 are preferably transmitted to a connection card of the communication network 48 adapted for use in the optical network unit 32. From the card 48, the signals can be Go to one or more destinations. The routing of these signals is achieved in a conventional manner well known to those skilled in the art. The signals can be routed in a conventional manner through an optical receiver / transmitter 52 to an optical network 32. Typically, the signals are transmitted in a conventional manner from the optical receiver / transmitter at 1310 nanometers. In addition, from card 48, the signals can be multiplexed in a conventional manner with signals from "POTS" cards 54 for further transmission to the public switched telephone network 56. Preferred Control and Alarm Devices of the Present Invention Advantageously, the connection of the broadband communications module and the optical network unit allows the implementation of certain test, alarm and control systems or devices with respect to the services offered to the subscriber or user associated with the device 16. With respect to the devices of alarm and test, a radio frequency (RF) output alarm and an optical signal alarm can be implemented with the present invention. For example, referring to Figure 4, one or more alarm devices may be implemented and served preferably through the connection of an alarm monitoring system 57 to the public switched telephone network 56 and / or through certain elements of the unit. of optical network 32, then to the broadband communications module 14 and finally to the interface of the coaxial cable 44 that serves the particular device 16 associated with a subscriber. A connection can be made through the test systems of the telephone network 56 to the down test unit 58, to the control processes 60 and then to the interface of the coaxial cable 44. In this connection, the signals are exchanged between the alarm monitoring system and the control process 60 through the described path. These signals can activate a program in the control process 60 in a manner well known to those skilled in the art. The control process 60 responds to the reception of the signals coming from the alarm monitoring system and acts as stipulated by its programming. This action may incorporate the interaction with the signals that pass through the interface of the coaxial cable 44 and / or the interaction with the device 16. Alternatively, the action may include the return of the information to the alarm monitoring system. An advantage of this device of the present invention is that it eliminates the need for any of the operating systems or special status monitoring receivers. An example of an alarm device is a device that provides an alarm regarding the loss of the RF signal or the loss of the optical input signal. For example, if the RF signal from the video providers is not recovered in the broadband communications module, then a sensor detects the loss of the RF signal and initiates a change in the status of the control unit (process of control) . Then, this change is reported to the alarm monitoring system 57. As another example, the alarm monitoring system can be operated to monitor a radio frequency output to activate an alarm after the degradation of the output delivered to the device or to activate the alarm after the degradation of an optical signal input to the broadband communications module. The preferred embodiment of the present invention also includes the control devices applicable to the services provided to the subscriber or user of the device 16. An example of a control device that is contemplated is the ability to turn on or off a CATV service of the subscriber . This control device can be implemented in a manner similar to the implementation of the alarm devices, as explained above. In this way, if the provider of the CATV service has not been paid by the subscriber, the service provider can send signals through the fiber in the circuit optical network unit to the control process 60 to activate a program in the network. control process 60 which results in the service for the particular device being cut off. The service is cut at interface 44. Once you are a subscriber pay your CATV account, the service provider can (if already paid enough) send signals through the control process 60 to activate a program that results in the service for the particular device being turned on. Advantageously, by using this exemplary control device, the CATV service provider does not have to send personnel to the location of the device to turn the service on or off. In this way, the CATV service provider saves money and offers better service to its subscribers. An additional monitoring device that is contemplated is a monitoring device. With this monitoring device, a service provider can receive digitized signals that represent monitoring data that reports the status of the video signals that are provided in the downstream path to one or more devices. Conveniently, the service provider can receive these digitized signals at a remote location. This monitoring device is preferably implemented in the same way as the control devices described in the preceding paragraph immediately. Another feature of the preferred embodiment of the present invention is the drop test unit 58. As illustrated in FIG. 4, this drop test unit 58 is adapted for use in the optical network unit 32 and generally operates through of a connection to the broadband communications module 14. This drop test unit 58 electrically tests the "down" to the device. The drop test unit accesses the lowering of control on an individual basis and measures the electrical characteristics of the descent. In addition, the download test unit 58 may include programming devices, such that upon receipt of the activation signals from a service provider, the download test unit 58 may be able to interact with an interface of the coaxial cable 44 to a device 16 to verify continuity. For example, a continuity check may include a verification of whether the coaxial cable is properly connected or connected to the fixed main equipment. In this way, when a subscriber calls the CATV service provider to complain about the television malfunctioning, the CATV service provider can use the continuity check procedure to determine if the problem is associated with the CATV service. . The test processes provided by the present invention also allow the service provider to determine the nature of a problem that annoys a subscriber. With the present invention, the service provider is able to make a more specific determination of the nature of a problem than with the prior art systems. As a result of the more specific determination, the service provider can react more quickly to the specific problem and resolve it more quickly than the prior art systems. For example, as a result of the test devices of the present invention, the service provider is able to send the correct service equipment, if necessary, to the location of the device. In other words, the service provider is able to make a smarter sending of a service group. A technician in fine uniform, moccasin-type shoe and manicure will no longer be sent to a problem that requires a technician in work overalls, boots and a shovel. In this way, the present invention allows the service provider to provide better service and in a more efficient and cost-saving manner.

Alternative Modalities of the Signal Transport System of the Present Invention Figures 5A and 5B illustrate alternative embodiments of the signal transport system of the present invention. In the modality illustrated in the figure 5A, a broadband communications module has not been included as part of the return path of the signals and / or the path downstream of the signals. In this embodiment, the video signal source 61 supplies the signals to a device 62. The interruption in the transmission line between the video signal source 61 and the device 62 indicates that other elements may be present between these two elements, but they are not shown in this drawing. One or more of these elements may include a broadband communications module. With respect to the return path, the device directly provides digital signals to an interface 64, instead of providing the analog signals to a broadband communications module as illustrated in FIGS. 2-4. As indicated by the dotted block 70, the interface can be adapted to be used in the device 62. Still referring to FIG. 5A, the interface 64 transmits the digital input signals in a connection format of the communication network to a card. connection of the communications network 66. As indicated by the dotted block 72, the interface 64 and the connection card of the communication network 66 can be adapted to be used in the device 62. Alternatively, the connection card of the communication network 66 can be adapted to be used in the device 62 with interface 64 being a separate element or otherwise positioned for use in the present invention. Preferably, the connection card of the communication network 66 is effective to transmit the digital signals in the connection format of the communication network to the connection of the communication network 68. In the embodiment illustrated in Figure 5B, a source of video signal 80 supplies signals to a broadband communications module 82. The interruption in the transmission line between the video signal source 80 and the broadband communications module 82 indicates that other elements may be present between these two elements, but they are not shown in this drawing. In this embodiment, the broadband communications module 82 provides video signals received from the video signal source 80 to a device 88. With respect to a return path, in contrast to the modes described in relation to FIGS. -4, the device 88 provides analog signals (preferably analog signals modulated including digital content) to an interface 86. Preferably, the interface 86 converts the analog signals into digital signals in a connection format of the communication network and transmits the signals in the format of connection of the communication network to a connection card of the communication network 84. The card 84, in turn, then provides the converted signals to a connection of the communication network 90. As indicated by the dotted blocks 92 and 94, the connection card of the communication network 84 and the interface 86 can be included in different c infigurations of the present invention. For example, as indicated by the dotted block 92, the connection card of the communication network 84 can be adapted for use with the broadband communication module 82. As indicated by the dotted block 94, the connection card of the communication network 84 and the interface 86 can be adapted to be used in connection with the broadband communications module 82. Other configurations of the elements illustrated in Figures 5A and 5B will come to the mind of those skilled in the art. In summary, the present invention allows a connection between CATV type services and communication services. In particular, the present invention allows a connection between, on the one hand, CATV type services in the downstream path of the transmission of video / data signals to a device and, on the other hand, communication type services in the return path of the transmission of video / data signals from the device. With this connection, the range of broadband services that is available to a subscriber is greatly expanded. In particular, the return path of the transmission of video / data signals may include optical networks, such as fiber networks in the circuit, thus providing the subscriber with communication services with greater broadband amplitude capability. Advantageously, the present invention provides an improved return path that minimizes signal distortion of signal transmission. In this return path, analog signals from a device are converted to digital signals to allow the transmission of signals to any broadband amplitude communication network through any connection card of the appropriate communications network. Furthermore, the present invention provides a system that is relatively inexpensive to establish, that works well with a minimum of equipment and minimal modification to the standard elements and that is easy to maintain and serve.

Claims (11)

1. NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and therefore the property described in the following claims is claimed as property. 1. A signal transport system having a downstream path for supplying video signals from a signal source through a broadband communications module to a device, the signal transport system is characterized by : an upstream path, separated from the downstream path, for upstream transport of analog signals from the device, for the conversion of analog signals to digital signals and for the transport upstream of the digital signals to a destination of signal; the upstream path includes the broadband communications module and an optical network unit; the broadband communications module being functionally connected to the device and being effective to receive the analog signals in the transport upstream of the analog signals coming from the device, also being effective to recognize that the analog signals are to be transmitted in the transport upstream towards the optical network unit, further being effective in response to recognition to convert the analog signals to digital signals and additionally being effective to transmit the digital signals in the upstream transport to the optical network unit; and the optical network unit being effective to receive the digital signals in the transport upstream of the digital signals and also being effective to transmit the digital signals in the transport upstream to the signal destination. The system according to claim 1, characterized in that the broadband communication module is further characterized by: an interface of the coaxial cable, a filter and a converter; wherein the interface of the coaxial cable receives the analog signals from the device and transmits the analog signals to the filter; wherein the filter is effective to recognize that the analog signals are to be transmitted in the upstream transport to the converter and transmit the analog signals to the converter; and where the converter converts analog signals to digital signals. 3. The system according to claim 2, characterized in that the broadband communication module is further characterized by the converter being effective for formatting the digital signals in a connection format of the communication network and for transmitting the digital signals in the connection format of the communication network in the transport upstream of the digital signals to a connection card of the communication network. The system according to claim 3, characterized in that the optical network unit is further characterized by the connection card of the communication network being adapted for use in the optical network unit. The system according to claim 3, characterized in that the signal transport system is further characterized by the connection card of the communication network being effective to transmit the digital signals in the connection format of the communication network in the transport upstream of the digital signals, towards an optical receiver / transmitter. The system according to claim 3, characterized in that the signal transport system is further characterized by the connection card of the communication network being effective to transmit the digital signals in the connection format of the communication network in the transport upstream of digital signals to a communications network. The system according to claim 1, further characterized by an alarm monitoring system functionally connected through the optical network unit and the broadband communication module to the device, the system being effective for monitoring the alarm to monitor a radio frequency signal or an optical signal provided in the downstream path from the signal source through the broadband communications module to the device and the system also being operative alarm monitoring to activate an alarm after the degradation of the radio frequency signal or the optical signal supplied to the device. The system according to claim 1, further characterized by a control device with respect to the video signals supplied to the device. The system according to claim 8, characterized in that the control device is further characterized by an ignition device or a shut-off device, wherein the video signals can be respectively turned on for supply to the device or switched off for the supply towards the device. The system according to claim 1, further characterized by a drop test unit functionally connected through the broadband communications module to the device, the drop test unit being effective for testing the electrical characteristics of the signal signals. video provided in the downstream path from the signal source through the broadband communications module to the device, the drop down unit also being effective to conduct a continuity check with respect to the video signals. 11. In a signal transport system having a downstream path for supplying video signals from a signal source through a broadband communications module to a device, a method for transporting signals in a path upstream from the device to a signal destination, the method is characterized by the steps of: providing the upstream path so that it separates from the downstream path and includes the broadband communications module and a network unit optics; receiving analog signals in the broadband communications module in the upstream path from the device; in response to receiving the analog signals in the upstream path from the device, causing the broadband communications module to recognize that the analog signals are to be transmitted in the upstream path to the optical network unit; in response to recognition, causing the broadband communications module to convert the analog signals to digital signals and transmit the digital signals in the upstream path to the optical network unit; and in response to receiving the digital signals in the upstream path from the broadband communications module, have the optical network unit transmit the digital signals in the upstream path to the signal destination. SUMMARY A system and method for the transmission of signals from a device to a connection card of the communications network. In particular, a return path is provided for the transmission of signals from a device to an interface where the signals are converted into an acceptable format for transmission to a connection card of the communication network. The signals are then transmitted to the card and / or can be transmitted to a unit of the optical network, thereby establishing a connection from the device to systems employing optical networks. One embodiment also provides a transport system for the supply of video signals to a device, for the return of analog signals from the device and for the transmission of digital signals to a signal destination. This mode includes a broadband communications module that receives video signals from a signal source and supplies the video signals to the device. The module also receives analog signals from the device and transmits the analog signals to an interface. The interface receives the analog signals, converts the analog signals to digital signals and transmits the digital signals to an optical network unit or to a connection card of the communications network for further transmission to a signal destination.