EP0738448A1 - System for automatically controlling the tuning of television receiver receiving channels - Google Patents

System for automatically controlling the tuning of television receiver receiving channels

Info

Publication number
EP0738448A1
EP0738448A1 EP95939323A EP95939323A EP0738448A1 EP 0738448 A1 EP0738448 A1 EP 0738448A1 EP 95939323 A EP95939323 A EP 95939323A EP 95939323 A EP95939323 A EP 95939323A EP 0738448 A1 EP0738448 A1 EP 0738448A1
Authority
EP
European Patent Office
Prior art keywords
video
circuit
video signals
phase
receiver
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Withdrawn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
EP95939323A
Other languages
German (de)
French (fr)
Inventor
Jino Nguyen
Yves Maetz
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.)
Technicolor SA
Original Assignee
Thomson Multimedia SA
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 Thomson Multimedia SA filed Critical Thomson Multimedia SA
Publication of EP0738448A1 publication Critical patent/EP0738448A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver

Definitions

  • the invention relates to a video reception apparatus and more particularly to a system for controlling the adjustment of the reception channels of a receiver relative to the reception channels of another receiver. It is particularly applicable to the adjustment servo of a video recorder on a television receiver.
  • the invention provides for using the television receiver to choose the channel (and so the channel) to record and set the VCR to the chosen channel on the television receiver.
  • European patent application EP 0618 721 A2 describes a video recorder provided with a reception circuit capable of being tuned on several reception channels and connected to a television receiver capable of also being tuned on several reception channels. Once tuned to a given channel, the television receiver displays the video signals and outputs the audio signals received while transmitting them to the VCR. The latter also comprises a circuit for comparing at least one component of the signal received directly by the video recorder with the corresponding component of the signal transmitted by the radio receiver. television audit video recorder.
  • Said comparison circuit being adapted to supply equality signals in the event of agreement of the two apparatuses on the same channel and inequality signals in the opposite case thus causing a search, by the video recorder, of the channel received by the receiver of TV.
  • Such a device operating in a completely transparent manner, does not allow the user to check whether the video recorder is actually tuned on the same channel as the television receiver.
  • the object of the invention is to allow the user to carry out such verifications without disturbing the television reception apparatus and thus constitutes a significant improvement of the device described in application EP 0 618 721 A2.
  • the invention therefore relates to a video reception device A comprising a circuit for receiving first video signals from a remote transmitter, a circuit for receiving second video signals from another TVS video reception device, a search circuit automatic transmission channel, a phase comparison circuit of the vertical synchronization signals of the first video signals and vertical synchronization signals of the second video signals and delivering a phase shift signal to control the operation of the automatic search circuit of transmission channels , characterized in that it further comprises a CC control circuit making it possible to display, for a predetermined time on the reception apparatus (TVS), the video signals received on the reception apparatus VCR.
  • TVS reception apparatus
  • control circuit comprises a timing circuit (TIME) controlled by the central control unit as soon as it is informed of the detection of a phase agreement between signals of vertical synchronization and which controls for a determined time, the transmission to the other video reception device (TVS), of the video signals which it receives as well as a signal (PIN8) indicating to this other device to display these video signals .
  • TIME timing circuit
  • one of the devices has circuits making it possible to carry out such a check.
  • the TVS device is a television receiver; it is tuned to a specific channel and receives a broadcast from its tuner TU2.
  • the reception device A is a VCR recording device (video recorder) and the user wishes to record the program which he is watching on the TVS receiver.
  • This VCR device has a TV reception circuit or
  • TUNER TU1 including an automatic search circuit for reception channels.
  • a central control unit CPU controls the automatic search of the TUNER TU1 and manages the general operation of the video recorder.
  • the circuit TU1 receives, by antenna for example, the video signals VD1 and transmits them to a circuit for detecting vertical synchronization signals VSD1.
  • the TVS receiver transmits the video signals it receives to the video recorder by a cable such as a scart cable. These video signals are received by another circuit for detecting vertical synchronization signals VSD2.
  • the instants of detection of the vertical synchronization signals are signaled by the detection circuits VSD1 and VSD2 to a phase comparator PC. If the synchronization signals detected by the circuits VSD1 and VSD2 are not in phase, this means that the reception channel of the VCR VCR is not the same as that to which the television receiver TVS is tuned.
  • the phase comparator PC supplies a phase shift signal to the central control unit CPU which controls the automatic search for another channel in the VCR VCR (see diagram in FIG. 4).
  • the PC circuit supplies a phase signal to the central control unit CPU, which then knows that the VCR VCR is tuned on the same channel as the TVS receiver. This system runs continuously to detect a possible change of chain.
  • the control unit CPU is then ready to receive from the user a recording order, an operation in recording mode for example.
  • the system of the invention can be used to program the VCR VCR, that is to say to fill in the correspondence table for the programs which must give, for each operated program key, the corresponding reception channel.
  • the TVS receiver being programmed, for each program (channel) displayed on the TVS receiver, the central control unit CPU of the video recorder is controlled in programming mode and it is given a first program number.
  • This microprocessor CPU controls the automatic channel search until finding a vertical synchronization signal of the video signal it receives from the antenna in phase with a vertical synchronization signal of the video signal it receives from the TVS receiver. When it detects two synchronization signals in phase, this means that the VCR is tuned to the same channel as the TVS receiver. He then advises the unit central control unit CPU, which stores the channel number and the program number in a program memory.
  • the user can then change the program (and therefore in principle the channel) on his TVS receiver. It returns a command to the central control unit CPU in programming mode and provides a second program number.
  • the automatic channel search circuit searches for the same channel as that received by the TVS receiver and the associated control unit displays, in program memory, the channel number found at the second program number, and so on.
  • a CC control circuit as shown in FIG. 2 including a TIMER circuit is provided. which is activated either by an ENR signal (in recording mode) or by a PRG signal (in programming mode), and which for a determined time (a few seconds, for example) controls (by closing contact C1) the transmission on the scart cable to the TVS receiver of video signals received by the VCR.
  • FIG. 3 represents a flowchart explaining the operation of the system described according to which a copy of the program memory of a receiver, TVS for example, is made in another receiver such as VCR.
  • the user selects the first program on the TVS receiver and triggers the programming operation of the VCR receiver (programming).
  • the system searches the VCR receiver for reception of the same channel as the TVS receiver and compares the phases of the vertical synchronization signals of the video signals received by the two devices. As long as the phase match is not detected, the system is looped on this search after advancing to the next channel. When a phase match is detected, the channel number is stored with the program number. Information is provided to the user to indicate that the program has been stored. The user can stop programming or continue by selecting the next program on the TVS receiver. He then orders programming again and so on. In the description, the invention has been explained by considering the case of a video recorder and a television receiver, but one could have considered any other type of device capable of receiving video broadcasts.

Abstract

A video receiver apparatus mainly including a phase comparator (PC) receiving video signals directly from a remote transmitter (via an antenna or cable) as well as video signals received by another video receiver. The phase comparator (PC) compares the phases of the vertical synchronisation signals of both video signals. When the video signals are out of phase, the comparator (PC) operates an automatic channel search circuit. The apparatus further comprises a control circuit (CC) for displaying the video signals received by the video receiver apparatus on the second video receiver for a predetermined time. Said apparatus is useful for programming the channels of a VCR and automatically selecting in the VCR the channel being watched on the television set to enable immediate and simplified recording.

Description

SYSTEME D'ASSERVISSEMENT DU REGLAGE DES CHAINES DE RECEPTION DE RECEPTEURS DE TELEVISION. CONTROL SYSTEM FOR ADJUSTING THE RECEIVING CHANNELS OF TELEVISION RECEIVERS.
L'invention concerne un appareil de réception vidéo et plus particulièrement un système d'asservissement du réglage des canaux de réception d'un récepteur par rapport aux canaux de réception d'un autre récepteur. Elle est applicable notamment à l'asservissement de réglage d'un magnétoscope sur un récepteur de télévision.The invention relates to a video reception apparatus and more particularly to a system for controlling the adjustment of the reception channels of a receiver relative to the reception channels of another receiver. It is particularly applicable to the adjustment servo of a video recorder on a television receiver.
Dans les magnétoscopes connus, lorsqu'un utilisateur désire enregistrer une émission de télévision il doit régler son magnétoscope sur la chaîne correspondant au canal de réception. Dans la pratique, il doit donc, en réglant la chaîne de son magnétoscope, s'assurer que le numéro de la chaîne qu'il sélectionne s'affiche sur le dispositif de visualisation du magnétoscope. Il n'a pas d'autre moyen de s'assurer que la chaîne a été convenablement sélectionnée.In known video recorders, when a user wishes to record a television program he must set his video recorder on the channel corresponding to the reception channel. In practice, he must therefore, by adjusting the channel of his VCR, ensure that the number of the channel he selects is displayed on the display device of the VCR. There is no other way to ensure that the channel has been properly selected.
Partant de la constatation que l'utilisateur a quasiment tout le temps un récepteur de télévision en état de fonctionner en même temps que le magnétoscope qu'il désire utiliser, l'invention prévoit d'utiliser le récepteur de télévision pour choisir la chaîne (et donc le canal) à enregistrer et de régler le magnétoscope sur la chaîne choisie sur le récepteur de télévision.Starting from the observation that the user has almost all the time a television receiver in working order at the same time as the video recorder which he wishes to use, the invention provides for using the television receiver to choose the channel (and so the channel) to record and set the VCR to the chosen channel on the television receiver.
Dans ces conditions, lorsque l'utilisateur désire enregistrer une émission de télévision reçue par antenne, ou par le câble par exemple, il sélectionne sur son récepteur de télévision la chaîne sur laquelle est retransmise l'émission attendue. Le magnétoscope connecté à ce téléviseur se réglera automatiquement sur le même canal de réception que le récepteur de télévision. La demande de brevet européen EP 0618 721 A2 décrit un magnétoscope muni d'un circuit de réception susceptible d'être accordé sur plusieurs canaux de réception et relié à un récepteur de télévision susceptible d'être également accordé sur plusieurs canaux de réception. Une fois calé sur un canal donné, le récepteur de télévision affiche les signaux vidéo et émet les signaux audio reçus tout en les transmettant au magnétoscope. Ce dernier comporte en outre un circuit de comparaison d'au moins une composante du signal reçu directement par le magnétoscope avec la composante correspondante du signal transmis par le récepteur de télévision audit magnétoscope. Ledit circuit de comparaison étant adapté à fournir des signaux d'égalité en cas d'un accord des deux appareils sur le même canal et des signaux d'inégalité dans la cas contraire provoquant ainsi une recherche, par le magnétoscope, du canal reçu parle récepteur de télévision. Un tel dispositif, fonctionnant de manière totalement transparente, ne permet pas à l'utilisateur de vérifier si le magnétoscope est effectivement accordé sur la même canal que le récepteur de télévision.Under these conditions, when the user wishes to record a television program received by antenna, or by cable for example, he selects on his television receiver the channel on which the expected program is retransmitted. The VCR connected to this TV will automatically set to the same reception channel as the TV receiver. European patent application EP 0618 721 A2 describes a video recorder provided with a reception circuit capable of being tuned on several reception channels and connected to a television receiver capable of also being tuned on several reception channels. Once tuned to a given channel, the television receiver displays the video signals and outputs the audio signals received while transmitting them to the VCR. The latter also comprises a circuit for comparing at least one component of the signal received directly by the video recorder with the corresponding component of the signal transmitted by the radio receiver. television audit video recorder. Said comparison circuit being adapted to supply equality signals in the event of agreement of the two apparatuses on the same channel and inequality signals in the opposite case thus causing a search, by the video recorder, of the channel received by the receiver of TV. Such a device, operating in a completely transparent manner, does not allow the user to check whether the video recorder is actually tuned on the same channel as the television receiver.
De façon plus générale, l'invention a pour objet de permettre à l'utilisateur d'effectuer de telle vérifications sans perturber l'appareil de réception de télévision et constitue ainsi un perfectionnement notable du dispositif décrit dans la demande EP 0 618 721 A2.More generally, the object of the invention is to allow the user to carry out such verifications without disturbing the television reception apparatus and thus constitutes a significant improvement of the device described in application EP 0 618 721 A2.
L'invention concerne donc un appareil de réception vidéo A comprenant un circuit de réception de premiers signaux vidéos provenant d'un émetteur distant, un circuit de réception de deuxièmes signaux vidéo provenant d'un autre appareil de réception vidéo TVS, un circuit de recherche automatique de canaux de transmission, un circuit de comparaison de phases des signaux de synchronisation verticale des premiers signaux vidéos et des signaux de synchronisation verticale des deuxièmes signaux vidéos et délivrant un signal de déphasage pour commander le fonctionnement du circuit de recherche automatique de canaux de transmission, caractérisé en ce qu'il comporte en outre un circuit de contrôle CC permettant de visualiser pendant un temps prédéterminé sur l'appareil de réception (TVS) les signaux vidéo reçus sur l'appareil de réception VCR.The invention therefore relates to a video reception device A comprising a circuit for receiving first video signals from a remote transmitter, a circuit for receiving second video signals from another TVS video reception device, a search circuit automatic transmission channel, a phase comparison circuit of the vertical synchronization signals of the first video signals and vertical synchronization signals of the second video signals and delivering a phase shift signal to control the operation of the automatic search circuit of transmission channels , characterized in that it further comprises a CC control circuit making it possible to display, for a predetermined time on the reception apparatus (TVS), the video signals received on the reception apparatus VCR.
Selon une caractéristique importante de l'invention, le circuit de contrôle (CC) comporte un circuit de temporisation (TIME) commandé par l'unité centrale de commande dès qu'elle est informée de la détection d'une concordance de phases entre signaux de synchronisation verticale et qui commande durant un temps déterminé, la transmission à l'autre appareil de réception vidéo (TVS), des signaux vidéos qu'il reçoit ainsi qu'un signal (PIN8) indiquant à cet autre appareil d'afficher ces signaux vidéos. Les différents objets et caractéristiques de l'invention apparaîtront plus clairement dans la description qui va suivre et dans les figures annexées qui représentent :According to an important characteristic of the invention, the control circuit (CC) comprises a timing circuit (TIME) controlled by the central control unit as soon as it is informed of the detection of a phase agreement between signals of vertical synchronization and which controls for a determined time, the transmission to the other video reception device (TVS), of the video signals which it receives as well as a signal (PIN8) indicating to this other device to display these video signals . The various objects and characteristics of the invention will appear more clearly in the description which follows and in the appended figures which represent:
- la figure 1 , un exemple de circuit pouvant mettre en oeuvre l'invention ;- Figure 1, an example of a circuit that can implement the invention;
- la figure 2, le circuit objet de l'invention ;- Figure 2, the circuit object of the invention;
- les figures 3 et 4, des organigrammes expliquant le fonctionnement du système.- Figures 3 and 4, flow charts explaining the operation of the system.
Dans les systèmes de transmission de télévision, on constate que tous les canaux de transmission n'ont pas le même temps d'origine. Même si deux canaux transmettent la même image et cela à partir d'un même émetteur, les images des deux canaux ne sont pas exactement en phase. Plus précisément, on s'aperçoit que les signaux de synchronisation verticale des deux canaux ne sont pas en phase. Dans ces conditions, pour s'assurer que deux récepteurs sont accordés sur le même canal, on peut vérifier que les signaux de synchronisation verticale des signaux vidéos reçus par les deux récepteurs sont en phase.In television transmission systems, it can be seen that not all transmission channels have the same original time. Even if two channels transmit the same image and this from the same transmitter, the images of the two channels are not exactly in phase. More specifically, we see that the vertical synchronization signals of the two channels are not in phase. Under these conditions, to ensure that two receivers are tuned to the same channel, it can be verified that the vertical synchronization signals of the video signals received by the two receivers are in phase.
Selon le schéma de la figure 1 , l'un des appareils possède des circuits permettant de faire un tel contrôle.According to the diagram in FIG. 1, one of the devices has circuits making it possible to carry out such a check.
Par exemple, l'appareil TVS est un récepteur de télévision; il est accordé sur un canal déterminé et reçoit par son tuner TU2 une émission.For example, the TVS device is a television receiver; it is tuned to a specific channel and receives a broadcast from its tuner TU2.
L'appareil de réception A est un appareil enregistreur VCR (magnétoscope) et l'utilisateur désire enregistrer l'émission qu'il visionne sur le récepteur TVS.The reception device A is a VCR recording device (video recorder) and the user wishes to record the program which he is watching on the TVS receiver.
Cet appareil VCR possède un circuit de réception TV ouThis VCR device has a TV reception circuit or
TUNER TU1 comprenant un circuit de recherche automatique de canaux de réception. Une unité de commande centrale CPU commande la mise en recherche automatique du TUNER TU1 et gère le fonctionnement général du magnétoscope.TUNER TU1 including an automatic search circuit for reception channels. A central control unit CPU controls the automatic search of the TUNER TU1 and manages the general operation of the video recorder.
Le circuit TU1 reçoit, par antenne par exemple, les signaux vidéos VD1 et les transmet à un circuit de détection de signaux de synchronisation verticale VSD1 . Par ailleurs, le récepteur TVS transmet les signaux vidéos qu'il reçoit au magnétoscope par un câble tel qu'un câble péritel. Ces signaux vidéos sont reçus par un autre circuit de détection de signaux de synchronisation verticale VSD2. Les instants de détection des signaux de synchronisation verticale sont signalés par les circuits de détection VSD1 et VSD2 à un comparateur de phase PC. Si les signaux de synchronisation détectés par les circuits VSD1 et VSD2 ne sont pas en phase, cela veut dire que le canal de réception du magnétoscope VCR n'est pas le même que celui auquel est accordé le récepteur de télévision TVS. Le comparateur de phase PC fournit un signal de déphasage à l'unité de commande centrale CPU qui commande la recherche automatique d'un autre canal dans le magnétoscope VCR (voir diagramme de la figure 4).The circuit TU1 receives, by antenna for example, the video signals VD1 and transmits them to a circuit for detecting vertical synchronization signals VSD1. In addition, the TVS receiver transmits the video signals it receives to the video recorder by a cable such as a scart cable. These video signals are received by another circuit for detecting vertical synchronization signals VSD2. The instants of detection of the vertical synchronization signals are signaled by the detection circuits VSD1 and VSD2 to a phase comparator PC. If the synchronization signals detected by the circuits VSD1 and VSD2 are not in phase, this means that the reception channel of the VCR VCR is not the same as that to which the television receiver TVS is tuned. The phase comparator PC supplies a phase shift signal to the central control unit CPU which controls the automatic search for another channel in the VCR VCR (see diagram in FIG. 4).
Si les signaux de synchronisation sont en phase le circuit PC fournit un signal de phase à l'unité de commande centrale CPU qui sait alors que le magnétoscope VCR est accordé sur le même canal que le récepteur TVS. Ce système tourne en continu pour détecter un éventuel changement de chaîne. L'unité de commande CPU est alors prête à recevoir de l'utilisateur un ordre d'enregistrement, un fonctionnement en mode enregistrement par exemple.If the synchronization signals are in phase, the PC circuit supplies a phase signal to the central control unit CPU, which then knows that the VCR VCR is tuned on the same channel as the TVS receiver. This system runs continuously to detect a possible change of chain. The control unit CPU is then ready to receive from the user a recording order, an operation in recording mode for example.
Le système de l'invention peut être utilisé pour programmer le magnétoscope VCR, c'est-à-dire pour remplir la table de correspondance des programmes qui doit donner pour chaque touche de programme manoeuvrée, le canal de réception correspondant. Dans ce cas, le récepteur TVS étant programmé, pour chaque programme (canal) affiché sur le récepteur TVS, on commande l'unité de commande centrale CPU du magnétoscope en mode programmation et on lui donne un premier numéro de programme. Ce microprocesseur CPU commande la recherche automatique de canal jusqu'à trouver un signal de synchronisation verticale du signal vidéo qu'il reçoit de l'antenne en phase avec un signal de synchronisation verticale du signal vidéo qu'il reçoit du récepteur TVS. Lorsqu'il détecte deux signaux de synchronisation en phase, cela veut dire que le magnétoscope est accordé sur le même canal que le récepteur TVS. Il en avise alors l'unité de commande centrale CPU, laquelle enregistre dans une mémoire de programme le numéro du canal et le numéro de programme.The system of the invention can be used to program the VCR VCR, that is to say to fill in the correspondence table for the programs which must give, for each operated program key, the corresponding reception channel. In this case, the TVS receiver being programmed, for each program (channel) displayed on the TVS receiver, the central control unit CPU of the video recorder is controlled in programming mode and it is given a first program number. This microprocessor CPU controls the automatic channel search until finding a vertical synchronization signal of the video signal it receives from the antenna in phase with a vertical synchronization signal of the video signal it receives from the TVS receiver. When it detects two synchronization signals in phase, this means that the VCR is tuned to the same channel as the TVS receiver. He then advises the unit central control unit CPU, which stores the channel number and the program number in a program memory.
L'utilisateur peut ensuite changer de programme (et donc en principe de canal) sur son récepteur TVS. Il refournit une commande à l'unité de commande centrale CPU en mode programmation et fournit un deuxième numéro de programme. Le circuit de recherche automatique de canaux recherche le même canal que celui reçu par le récepteur TVS et l'unité de commande associé affiche, dans la mémoire de programme, le numéro de canal trouvé au deuxième numéro de programme, et ainsi de suite.The user can then change the program (and therefore in principle the channel) on his TVS receiver. It returns a command to the central control unit CPU in programming mode and provides a second program number. The automatic channel search circuit searches for the same channel as that received by the TVS receiver and the associated control unit displays, in program memory, the channel number found at the second program number, and so on.
Pour s'assurer tant en mode de programmation qu'en mode enregistrement du magnétoscope VCR que celui-ci est bien calé sur le même canal visualisé sur le récepteur TVS on prévoit un circuit de contrôle CC tel que représenté en figure 2 comportant un circuit TIMER qui est activé, soit par un signal ENR (en mode enregistrement), soit par un signal PRG (en mode programmation), et qui durant un temps déterminé (quelques secondes, par exemple) commande (en fermant le contact C1 ) la transmission sur le câble péritel vers le récepteur TVS des signaux vidéos reçus par le magnétoscope VCR. Simultanément, un signal de commutation lente est transmis sur une broche (PIN8) du connecteur péritel pour commander au récepteur TVS de connecter (à l'aide du circuit Cl et du contact C2) ses circuits de réception au câble péritel de façon à ce que le récepteur TVS affiche les signaux vidéo reçus du magnétoscope VCR. A l'issue de la temporisation, le signal de tension sur la PIN8 est supprimé, le magnétoscope applique un signal de tension nulle de façon à ce que le récepteur se reconnecte à ses circuits de réception d'antenne. De cette façon, durant le temps déterminé par le circuit de temporisation TIME l'utilisateur a visionné l'émission vidéo que son magnétoscope reçoit et enregistre. La figure 3, représente un organigramme expliquant le fonctionnement du système décrit selon lequel on réalise une copie de la mémoire des programmes d'un récepteur, TVS par exemple, dans un autre récepteur tel que VCR. Dans une première étape, l'utilisateur sélectionne le premier programme sur le récepteur TVS et déclenche le fonctionnement de programmation du récepteur VCR (programmation).To ensure both in programming mode and in recording mode of the VCR VCR that it is properly set on the same channel viewed on the TVS receiver, a CC control circuit as shown in FIG. 2 including a TIMER circuit is provided. which is activated either by an ENR signal (in recording mode) or by a PRG signal (in programming mode), and which for a determined time (a few seconds, for example) controls (by closing contact C1) the transmission on the scart cable to the TVS receiver of video signals received by the VCR. Simultaneously, a slow switching signal is transmitted on a pin (PIN8) of the SCART connector to command the TVS receiver to connect (using the C1 circuit and the C2 contact) its reception circuits to the SCART cable so that the TVS receiver displays the video signals received from the VCR. At the end of the time delay, the voltage signal on PIN8 is deleted, the video recorder applies a zero voltage signal so that the receiver reconnects to its antenna reception circuits. In this way, during the time determined by the TIME delay circuit, the user has viewed the video program that his video recorder receives and records. FIG. 3 represents a flowchart explaining the operation of the system described according to which a copy of the program memory of a receiver, TVS for example, is made in another receiver such as VCR. In a first step, the user selects the first program on the TVS receiver and triggers the programming operation of the VCR receiver (programming).
Le système recherche dans le récepteur VCR la réception du même canal que le récepteur TVS et compare les phases des signaux de synchronisation verticale des signaux vidéos reçus par les deux appareils. Tant que la concordance de phase n'est pas détectée, le système est bouclé sur cette recherche après avancement au canal suivant. Lorsqu'une concordance de phase est détectée, le numéro du canal est mémorisé avec le numéro du programme. Une information est fournie à l'utilisateur pour indiquer que le programme a été mémorisée. L'utilisateur peut arrêter la programmation ou continuer en sélectionnant le programme suivant sur le récepteur TVS. Il commande alors à nouveau la programmation et ainsi de suite. Dans la description, on a expliqué l'invention en considérant le cas d'un magnétoscope et d'un récepteur de télévision, mais on aurait pu considérer tout autre type d'appareil capable de recevoir des émissions vidéos. The system searches the VCR receiver for reception of the same channel as the TVS receiver and compares the phases of the vertical synchronization signals of the video signals received by the two devices. As long as the phase match is not detected, the system is looped on this search after advancing to the next channel. When a phase match is detected, the channel number is stored with the program number. Information is provided to the user to indicate that the program has been stored. The user can stop programming or continue by selecting the next program on the TVS receiver. He then orders programming again and so on. In the description, the invention has been explained by considering the case of a video recorder and a television receiver, but one could have considered any other type of device capable of receiving video broadcasts.

Claims

REVENDICATIONS
1. Appareil de réception vidéo A comprenant un circuit de réception de premiers signaux vidéo provenant d'un émetteur distant, un circuit de réception de deuxièmes signaux vidéo provenant d'un autre appareil de réception vidéo (TVS), un circuit de recherche automatique de canaux de transmission (TV1 ), un circuit de comparaison de phases (PC) des signaux de synchronisation verticale, des premiers signaux vidéo et des signaux de synchronisation verticale des deuxièmes signaux vidéo et délivrant un signal de déphasage pour commander le fonctionnement du circuit de recherche automatique de canaux de transmission (TV), caractérisé en ce qu'il comporte en outre un circuit de contrôle (CC) permettant de visualiser pendant un temps prédéterminé sur le deuxième appareil de réception vidéo (TVS) les signaux vidéo reçus sur l'appareil de réception vidéo A.1. Video reception apparatus A comprising a circuit for receiving first video signals from a remote transmitter, a circuit for receiving second video signals from another video reception apparatus (TVS), an automatic search circuit for transmission channels (TV1), a phase comparison circuit (PC) of the vertical synchronization signals, the first video signals and vertical synchronization signals of the second video signals and delivering a phase shift signal to control the operation of the search circuit automatic transmission channel (TV), characterized in that it further comprises a control circuit (CC) making it possible to display for a predetermined time on the second video receiving device (TVS) the video signals received on the device receiving video A.
2. Appareil de réception selon la revendication 1 , caractérisé en ce que le récepteur A est un appareil enregistreur (VCR) et comporte une unité centrale de commande (UC) qui gère le fonctionnement de l'enregistreur et commande le circuit de recherche automatique de canaux (TU1 ), le signal de déphasage fourni par le circuit de comparaisons de phase (PC) étant transmis à l'unité centrale (UC) qui commande le circuit de recherche automatique de canaux (TV) tant qu'il reçoit le signal de déphasage et qui arrête le fonctionnement du circuit de recherche automatique de canaux dès que le circuit de comparaison de phases détecte une concordance de phases entre signaux de synchronisation verticale.2. Receiving device according to claim 1, characterized in that the receiver A is a recording device (VCR) and comprises a central control unit (UC) which manages the operation of the recorder and controls the automatic search circuit of channels (TU1), the phase shift signal supplied by the phase comparison circuit (PC) being transmitted to the central unit (UC) which controls the automatic channel search circuit (TV) as long as it receives the signal phase shift and which stops the operation of the automatic channel search circuit as soon as the phase comparison circuit detects a phase match between vertical synchronization signals.
3. Appareil selon les revendications 1 et 2, caractérisé en ce que le circuit de contrôle (CC) comporte un circuit de temporisation (TIME) commandé par l'unité centrale de commande dès qu'elle est informée de la détection d'une concordance de phases entre signaux de synchronisation verticale et qui commande durant un temps déterminé, la transmission à l'autre appareil de réception vidéo (TVS), des signaux vidéos qu'il reçoit ainsi qu'un signal (PIN8) indiquant à cet autre appareil d'afficher ces signaux vidéos. 3. Apparatus according to claims 1 and 2, characterized in that the control circuit (CC) comprises a timing circuit (TIME) controlled by the central control unit as soon as it is informed of the detection of a match of phases between vertical synchronization signals and which controls, for a determined time, the transmission to the other video receiving device (TVS), of the video signals which it receives as well as a signal (PIN8) indicating to this other device of 'display these video signals.
4. Appareil de réception selon la revendication 2, caractérisé en ce que l'unité centrale de commande (UC) possède des moyens pour une mise en mode de fonctionnement de programmation et elle comporte une mémoire de programmes, l'unité centrale de commande (UC) fournissant un numéro de canal détecté lorsque le circuit de comparaison de phase détecte une concordance de phase, ledit numéro de canal étant enregistré dans la mémoire de programmes avec un numéro de programme présélectionné.4. Reception apparatus according to claim 2, characterized in that the central control unit (UC) has means for a setting into programming operating mode and it comprises a program memory, the central control unit (UC) providing a channel number detected when the phase comparison circuit detects a phase match, said channel number being recorded in program memory with a preset program number.
5. Appareil de réception selon la revendication 2, caractérisé en ce que l'unité centrale de commande (UC) possède des moyens pour une mise en mode de fonctionnement enregistrement, ceux-ci commandant la mise en mode enregistrement de l'enregistreur lorsque le circuit de comparaison de phases détecte une concordance entre signaux de synchronisation verticale.5. Reception apparatus according to claim 2, characterized in that the central control unit (UC) has means for putting in recording operating mode, these controlling the putting in recording mode of the recorder when the phase comparison circuit detects a match between vertical synchronization signals.
6. Appareil de réception selon la revendication 1 , caractérisé en ce qu'il comporte un connecteur de type péritel permettant de connecter le deuxième récepteur et de recevoir lesdits deuxièmes signaux vidéos. 6. Reception apparatus according to claim 1, characterized in that it comprises a scart type connector for connecting the second receiver and for receiving said second video signals.
EP95939323A 1994-11-04 1995-11-03 System for automatically controlling the tuning of television receiver receiving channels Withdrawn EP0738448A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9413235 1994-11-04
FR9413235A FR2726719B1 (en) 1994-11-04 1994-11-04 VIDEO RECEIVING APPARATUS AND METHOD FOR SERVING RECEIVERS
PCT/FR1995/001451 WO1996014709A1 (en) 1994-11-04 1995-11-03 System for automatically controlling the tuning of television receiver receiving channels

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EP0738448A1 true EP0738448A1 (en) 1996-10-23

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EP95939323A Withdrawn EP0738448A1 (en) 1994-11-04 1995-11-03 System for automatically controlling the tuning of television receiver receiving channels

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US (1) US5956097A (en)
EP (1) EP0738448A1 (en)
JP (1) JPH10503905A (en)
FR (1) FR2726719B1 (en)
WO (1) WO1996014709A1 (en)

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Also Published As

Publication number Publication date
JPH10503905A (en) 1998-04-07
WO1996014709A1 (en) 1996-05-17
US5956097A (en) 1999-09-21
FR2726719A1 (en) 1996-05-10
FR2726719B1 (en) 1996-11-29

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