EP0648029A1 - Radio- und Fernsehrundfunksystem mit Abkopplung von lokalen Programmen - Google Patents

Radio- und Fernsehrundfunksystem mit Abkopplung von lokalen Programmen Download PDF

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Publication number
EP0648029A1
EP0648029A1 EP94402227A EP94402227A EP0648029A1 EP 0648029 A1 EP0648029 A1 EP 0648029A1 EP 94402227 A EP94402227 A EP 94402227A EP 94402227 A EP94402227 A EP 94402227A EP 0648029 A1 EP0648029 A1 EP 0648029A1
Authority
EP
European Patent Office
Prior art keywords
local
list
broadcasting
central
programs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP94402227A
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English (en)
French (fr)
Inventor
Florence Lauze
Bernard Lemaire
Bernard Chesnet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telediffusion de France ets Public de Diffusion
Original Assignee
Telediffusion de France ets Public de Diffusion
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telediffusion de France ets Public de Diffusion filed Critical Telediffusion de France ets Public de Diffusion
Publication of EP0648029A1 publication Critical patent/EP0648029A1/de
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H04H60/06—Arrangements for scheduling broadcast services or broadcast-related services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/10—Arrangements for replacing or switching information during the broadcast or the distribution

Definitions

  • the present invention relates to a system for broadcasting radio or television programs with local stalls comprising, in a central control room, a broadcasting robot arranged to receive a predetermined time master list of a sequence of programs to be broadcast and to consequently control corresponding program sources and connect them, according to said sequence, to a central transmission headend intended for at least one local headend, the local headend comprising local equipment for sending start, a receiver connected to the central network head and an automaton arranged to be connected to the central control room by a data transmission link to, under its control, control the operation of at least one local program source and control local switching means to connect the local transmission start equipment either to the local receiver or to the local source.
  • the broadcasting of the programs can be carried out by hertzian way, direct or by satellite, or on a cable network.
  • the broadcasting of the programs by the headend is, in one case, carried out by means of an antenna and, in the other case, by means of an electrical or electro-optical transmitter.
  • the broadcasting of radio or audio-visual programs over an extended territory requires transmitting these programs, to any point in this territory, with sufficient power to ensure good quality of reception.
  • a single transmitter being unable to have the necessary power and the territory possibly comprising zones of radioelectric shadow due to the relief, local transmitters are used, each covering a particular zone of the territory, which receive a final or central control room and simultaneously re-broadcast a common sequence of national or regional programs.
  • the local transmitters can temporarily transmit, instead of one of the national or regional programs, a local program, that is to say that they get rid of, or drop out of, the common sequence. of programs.
  • the operator follows the progress of the broadcasting of the programs transmitted to the local transmitters and, when he notes, according to a pre-established list, that a dropout is planned for one of these, the operator estimates the time remaining at the end of the previous program in progress, according to a final credits or according to the expected duration of this program; it sends its off-hook order to the local PLC considered a little before the end of the program.
  • the subsequent hanging is done in the same way.
  • the time between the reception of this order and the end of the current program should correspond exactly to the reaction time of the local source, for example the time to launch a cassette player, in order to avoid "blank” or the recovery of the programs indicated above.
  • the remote control overcomes the need for the presence of an operator with the local transmitter, determining the end of program time before dropping out as well the estimation of the reaction time of the local source are very empirical, so that the synchronization of the emission of the local dropout program with the programs surrounding it leaves something to be desired.
  • the present invention aims to provide automation of dropouts, in particular by eliminating the remote control data defined above to ensure great flexibility of operation.
  • the invention relates to a system of the type mentioned above, characterized in that the central control center comprises a central control automaton arranged to receive a list of main dropouts and to reschedule it over time as a function of information. synchronization provided by the broadcasting robot from the actual broadcasting times of the programs and for, as a function of said drop-out list, order the local controller with a predetermined notice with respect to the end of a running program.
  • the content of the main list of programs which may no longer correspond to the reality of the programs, for example in the event of a technical incident or a change in the duration of a program, is readjusted in time from a simple "observation" of the sequencing of emissions from the central transmitter controlled by the broadcasting robot, without the need to plan to record remote control data in the programs preceding the stalls.
  • the broadcasting robot includes means for periodically updating the main list, sensitive to the actual broadcasting times of the programs by the central transmitter and connected to the central controller.
  • the central PLC thus has a main list of recent programs much more accurate than the initial list and which takes into account in particular the program changes, of which the local PLCs can then be informed well in advance of a dropout. so they can prepare the local sources they want.
  • the local machine comprises means for storing the drop-out list and is arranged for, by comparison of this list with the commands coming from the central machine, synchronizing the local source with the current program broadcast by the central transmitter. Depending on the commands from the central controller, it can perform delayed off-hook.
  • the program broadcasting system of the invention is used, in this example, for broadcasting television programs.
  • Diffusion is here carried out by hertzian way but the invention is not limited to this mode of diffusion and can be applied to any other mode of diffusion, for example a diffusion by satellite or a diffusion by cable.
  • the system comprises a central control unit 1 in which a broadcasting robot 2 controls a switching matrix 3 and sources 4 of television programs, here players previously loaded by video cassettes, connected to inputs of the matrix 3, including one output provides a central network head, here a transmitter 5, the corresponding video signal.
  • the connections shown in double lines are control connections.
  • the robot 2 receives by a link 7, and stores in a memory 8, a predetermined time main list 6 of a sequence of television programs to be broadcast, also called antenna conductor.
  • a computer 9 of the robot 2 controls in time the matrix 3 and the sources 4 according to the main list of programs 6 and according to possible commands from an operator through a link 10 as well as according to possible incidents techniques, signaled by sensors not shown.
  • the computer 9 contains the main list 6 of the programs to be broadcast and updates it in real time to create a real time list 6 ′, as a function of the sequencing of the programs that it transmits to the transmitter 5 and of their real timetables.
  • An automaton 12 of final control receives by a link 13, here of the type of the protected mark ETHERNET, and stores in a memory 14, the main updated list 6 'of the programs initially planned, here coming from the robot 2.
  • the automaton 12 also receives synchronization information coming from the robot 2 through a link 15 and relating to the real times of transmission of the programs. Via a link 16, the automaton 12 receives, and stores in a memory 17, a list 11 of dropouts, comprising the identities of the programs of the main list 6 for which a re-transmission stall is provided, as well as the identity one or more local retransmission transmitters.
  • the list 11 of dropouts comes, here, from an editing station 18.
  • the automaton 12, and in particular the microprocessor 19, is connected, by a data transmission link 22, to an automaton 32 belonging to a local network head, here a local transmitter 31.
  • a broadband link 23, here the wireless network connects the output of the transmitter 5 to a receiver 33 of the local transmitter 31, the output of which is connected to a transmission start equipment, here an antenna 35, through a switching grid 34.
  • a local source 36 here a video tape player, is controlled by the local controller 32 and is connected to an input of the switching gate 34.
  • the gate 34 is controlled by the local controller 32 to connect the local antenna 35 either at the local receiver 33 or at the local source 36. For the sake of clarity, only one local source is shown.
  • the local machine 32 includes, in this example, a memory 37 for storing the list 11 of the dropouts which, here, is transmitted to it, via the link 22, by a download device 20, contained, here, in the machine 12 and connected to the memory 17.
  • the automaton 12 also includes a memory 21 for memorizing, from external writing means, periods of notice defining the time of issue of off-hook orders, on the link 22 , compared to the scheduled dropout time.
  • a data receiver 38 of the controller 32 here external to the controller, is connected to the link 22 and restores the data sent by the microprocessor 19 to a calculation block 39 which controls the grid 34 and the source 36 in execution of remote control commands defined by this data.
  • the receiver 38 also makes it possible to load the list 11 of the dropouts in the memory 37.
  • the central control room 1 and the local transmitter 31 receive, here, common time base signals, not shown. , and the orders associated with a precise execution instant include a data field fixing the absolute time of their execution.
  • a supervision station 40 located in a maintenance site is connected by data transmission link to the local controller 32 in order to collect the alarms and information on the progress of the stalls.
  • the supervision station 40 could also be connected to the central controller 12.
  • the computer 9 manages the emission of the sources 4 according to the main list of programs and updates, or realigns, in real time its own list 6 ', real time, according to the hazards likely to disturb the planned sequencing, c 'that is to say, is sensitive to the actual broadcast times and modifies, if necessary, the sequence of the programs in this real time list 6' and their start and end times of broadcast.
  • This real time list 6 ' is sent cyclically on the link 13, which allows the local controller 12 to update the content of the memories 14 and 17, containing the non real time lists. It will be understood that the main list 6 and the drop-out list 11 could have been combined into a single list.
  • the main list 6 'received by the automaton 12 is however not always an exact copy of the main real-time list 6' of the computer 9 because the latter can change between two cyclic transmissions on the link 13 and thus be out of phase with respect to to the main 6 'real time list issued.
  • the computer 9 determines the time remaining at the end of the program being broadcast from the main real time list 6 ′, up to date, and the signals time base or by comparison of the total expected duration of transmission of the current program with its transmission duration already elapsed, and transmits, on the link 15, the synchronization information.
  • the microprocessor 19 of the control system 12 updates the memories 14 and 17 and, when the drop-out list 11 of the memory 17 includes a drop-out for the program following the program in during broadcasting, the microprocessor 19 transmits, with a warning defined by the content of the memory 21, an off-hook order on the link 22, also indicating the time scheduled for off-hook.
  • the calculation block 39 of the local automaton 32 then updates the list 11 of the stalls of the memory 37 and controls, as a function of local source identification data contained in the list 11 of the stalls, a local robot, not shown, who takes a videotape from a library and places it in the player 36.
  • the notice corresponds to the activation time of the player 4 of the cassette of the next recorded program , if that is the case. It is then planned to charge the local reader 36 well in advance, so as to have only to activate it with the relatively short notice which remains for the stall.
  • the microprocessor 39 sends, just before the start of the off-hook, a synchronized activation order from the local source 36 and a switching order from the gate 34, in order to connect, in a synchronized manner, the antenna 35 to the source 36 and no longer to the receiver 33.
  • the anticipations of the two above orders at the moment drop-out times correspond respectively to the drive 36 launch time and the gate 34 switching time.
  • the return to the hooked state is done under the sole control of the local controller 32, since the local program emitted by the source 36 has the same duration as the program or programs for which it is substituted and, in the absence of broadcast uncertainties, is therefore synchronized with the main real-time list 6 'of the computer 9. It could however have been expected that the return of the transmitter 31 to a hung state where it operates as a re-transmitter uses the same principle as that used for dropping out.
  • the central controller 12 can issue cancellation control orders, by the local controller 32, of preparations for off-hook, such as a loading of a local reader or orders with a time reference, with delayed execution, sent by the automaton 32 to sequencers of the local transmitter 31.
  • the downloading device 20 here makes it possible to download the list 11 of the dropouts in the memory 37 and possibly other data or even sound and image signals to be stored, well before their broadcasting, in a source such as that referenced 36.
  • the data link 22 could have been a signaling channel contained in the video signal of the images broadcast by the central transmitter 5.
  • the download device 20 could have been a device for inserting data from the microprocessor 19, or data from the list 11 dropouts, this insertion being carried out in a line, not rendered in video, of the images transmitted, for example the sixteenth line of the images.
  • the receiver 38 would then extract the data from the sixteenth line of the images received.
  • the notice stored in the memory 21 is adjustable by writing to the memory 21.
  • the notice depends on the type of local source 36 to be activated, insofar as the drop-out list 11 contains such information or that the local transmitter 31 has informed the automaton 12 about this, that is to say that the notice may provide sufficient handling time for the local robot to transport a cassette, whereas this time will be shorter if the cassette is already loaded in the player.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Selective Calling Equipment (AREA)
EP94402227A 1993-10-07 1994-10-05 Radio- und Fernsehrundfunksystem mit Abkopplung von lokalen Programmen Withdrawn EP0648029A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9311952 1993-10-07
FR9311952A FR2711025B1 (fr) 1993-10-07 1993-10-07 Système de diffusion de programmes radiophoniques ou de télévision à décrochages locaux.

Publications (1)

Publication Number Publication Date
EP0648029A1 true EP0648029A1 (de) 1995-04-12

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EP94402227A Withdrawn EP0648029A1 (de) 1993-10-07 1994-10-05 Radio- und Fernsehrundfunksystem mit Abkopplung von lokalen Programmen

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EP (1) EP0648029A1 (de)
FR (1) FR2711025B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0394939A2 (de) * 1989-04-27 1990-10-31 Sony Corporation Programmübertragungssystem und -verfahren
EP0443933A1 (de) * 1990-02-21 1991-08-28 Aavs Arcomis Groupe Avs, Sarl Verfahren zur Einfügung von Tonmeldungen in Lokalrundfunksendungen
EP0482801A2 (de) * 1990-10-23 1992-04-29 Sony ( Australia) Pty Limited Automatische Übertragungssysteme zur Fernseh- und Rundfunkübertragung
EP0557185A1 (de) * 1992-02-18 1993-08-25 Telediffusion De France Studioanlage zum Senden von audiovisuellen Programmen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482802B1 (de) * 1990-10-23 1996-09-25 Sony Australia Limited Automatisches Übertragungsverfahren für Fernseh- und Rundfunkübertragung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0394939A2 (de) * 1989-04-27 1990-10-31 Sony Corporation Programmübertragungssystem und -verfahren
EP0443933A1 (de) * 1990-02-21 1991-08-28 Aavs Arcomis Groupe Avs, Sarl Verfahren zur Einfügung von Tonmeldungen in Lokalrundfunksendungen
EP0482801A2 (de) * 1990-10-23 1992-04-29 Sony ( Australia) Pty Limited Automatische Übertragungssysteme zur Fernseh- und Rundfunkübertragung
EP0557185A1 (de) * 1992-02-18 1993-08-25 Telediffusion De France Studioanlage zum Senden von audiovisuellen Programmen

Also Published As

Publication number Publication date
FR2711025A1 (fr) 1995-04-14
FR2711025B1 (fr) 1995-11-17

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