DE3151492A1 - Audio/video home system - Google Patents
Audio/video home systemInfo
- Publication number
- DE3151492A1 DE3151492A1 DE19813151492 DE3151492A DE3151492A1 DE 3151492 A1 DE3151492 A1 DE 3151492A1 DE 19813151492 DE19813151492 DE 19813151492 DE 3151492 A DE3151492 A DE 3151492A DE 3151492 A1 DE3151492 A1 DE 3151492A1
- Authority
- DE
- Germany
- Prior art keywords
- video
- audio
- picture
- monitor
- home system
- 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- Withdrawn
Links
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/20—Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver
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- 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
Abstract
Description
Beschreibung description
Audio-Video-Heimanlage gemaß der älteren Schutzrechtsanmeldung P 3146173.5 bzw. Audio-video home system according to the earlier patent application P 3146173.5 or
G 8133974.7 -ist eine Fernsehempfangsanlage im Komponentenbauweise vorgeschlagen worden, bei der u.a. eine separate Empfangsteil-Komponente mit mehreren HK/?F-Empfangseinhe-it'en zur Anwendung kommt.G 8133974.7 -is a television reception system in component construction has been proposed in which, inter alia, a separate receiving part component with several HK /? F receiving units is used.
Zusammen mit den weiteren Bildprogrammquellen einer solchen Anlage, nämlich den Komponenten Bildaufzeichnungs- und Wiedergabegerät und ggfls. Bildplattenspieler, sowie einer Videokamera, stehen damit 3 bis 5 B-ildprogramme zur Wahl. Diese sind jeweils al Video (FBAS-)Signal und Ton- (NF)-Signal verfügbar, jedoch kommt nur di jeweils ausgewihlte Quelle über den Biidwiedergabemonitor bzw. die zugehörigen Lautsprecherboxen zur Wiedergabe.Together with the other image program sources of such a system, namely the components image recording and playback device and, if applicable. Video record player, as well as a video camera, there are 3 to 5 image programs to choose from. These are each al video (FBAS) signal and audio (NF) signal available, but only comes di each selected source via the image playback monitor or the associated Loudspeaker boxes for playback.
Die Erfindung befaßt sich mit der Aufgabe; die verfügbare Programmvielfalt dieser Anlage in größerem Umfang auszunutzen, als es bisher erfolgt, und darüber hinaus neben erheblichen Einsparungen zugleich noch die Handhabung zu vereinfachen-und den Serviceaufwand zu verringern.The invention is concerned with the problem; the variety of programs available to take advantage of this facility to a greater extent than has previously been the case, and above in addition to considerable savings at the same time to simplify the handling and to reduce service costs.
Die Erfindung betrifft eine Audio-Videc--Heimanlage mit separatem Bildmonitor und Läutsprecherboxen und mit einem Empfangs- und Programmqucll en-Zentrum in Komponenten-Bauweise, bestehend aus den Komponontetl TV-Audio-Empfangsteil, HiFi-NF-Verstärker, Video-Recorder und/oder Bilplattspieier sowie bedarfsweise HiFi-Cassettenrecorder und/oder HiFi-Plattenspieler und hat zum Gegenstand, daß vom Empfangs- und Programmquellenzentrum mehrere Bildmonitore und/oder Lautsprecherboxen wahlweise mit den gleichen oder verschiedenen Bild- und/oder Tonprogrammen versorgt werden.The invention relates to an audio Videc - home system with a separate Image monitor and loudspeaker boxes and with a reception and program source center in component construction, consisting of the components TV audio receiver, hi-fi audio amplifier, Video recorder and / or bilateral player and, if necessary, hi-fi cassette recorder and / or HiFi record player and has the object that of the reception and program source center several Image monitors and / or loudspeaker boxes optionally with the the same or different picture and / or sound programs are supplied.
Für die Signalaufbereitung der verschiedenen Programmquellen d.h. der mindestens 2 Fernsehsignale und der auf Band oder Platte gespeicherten Information bis zur Video (FBAS)- und Ton (NF)-Signalebene ist ein erheblicher elektronischer Aufwand erforderlich. Bei den im Unterhaltungsbereich bisher bekannten Geräte- und knlagenkonzeptionen kommt jeweils nur e?ne Programmquelle zur Wiedergabe, d?hg die für die Signalaufbe-' reitung der übrigen Programmquellen erforderl'ichen elektronischen Funktionsgruppen bleiben während des größten Teiles der Betriebszeit unbenutzt.For the signal processing of the various program sources i.e. the at least 2 television signals and the information stored on tape or disk up to the video (FBAS) and sound (NF) signal level is a considerable electronic one Effort required. With the devices and devices known so far in the entertainment sector control conceptions, only one program source is played back, i.e. the for the signal processing of the other program sources necessary electronic Function groups remain unused for most of the operating time.
Mit der erfindungsgemä'ßen Ausgestaltung einer Fernsehempfangs-und Video-Anlage als simultan arbeitende Zentrale zur Wiedergabe verschiedener Bild- und Tpnprogramme über eine entsprechende Anzahl von Monitore für Bild und Ton wird die Bilanz zwischen Nutzen und Aufwand hier deutlich verbessert.With the embodiment according to the invention of a television reception and Video system as a simultaneously working center for the reproduction of different image and Tpnprogramme is on a corresponding number of monitors for picture and sound the balance between benefit and effort is significantly improved here.
Ebenfalls vorteilhaft beider erfindungsgem.ißen Anordnung ist der Fortfall einer auf mehrere Raume verzweigten kntennenverkabelung, die bekanntlich stets zu Qualitätsverlusten bzw.The arrangement according to the invention is also advantageous Discontinuation of a cabling branching out to several rooms, which is well known always leads to a loss of quality or
einer Verringerung des Signal-Rauschabstandes führt. Demgegenüber bringt die erforderliche videoseitige Signalverkabelung keine derartigen Qualitatsnachteile. Eine Weiterbildung der Erfindung liegt darin, daß die Bildmonitore und/oder Lautsprecherboxen in verschiedenen Riiumerl und vom Standort der A-V-Heimanlage unabhångig angeordnet sind.leads to a reduction in the signal-to-noise ratio. In contrast the required video-side signal cabling does not bring any such quality disadvantages. A further development of the invention is that the picture monitors and / or loudspeaker boxes Arranged in different rooms and independent of the location of the A-V home system are.
Die zentrale Programmverteilung auf mehrere Räume erfordert zwar eine definierte ProgrammauswahL und eine gewisse Festlegung für die betreffenden Sendungen. Dieser Umstand kann jedoch durchaus als Vorteil gesehen werden - im Sinne einer bewußten und positiven Nutzung des ständig wachsenden Informationsangebotes unter Vermeidung einer planlosen Reizüberflutung.The central program distribution over several rooms requires one Defined program selection and a certain stipulation for the relevant programs. This fact can but can be seen as an advantage - in the sense of a conscious and positive use of the constantly growing range of information while avoiding a haphazard sensory overload.
Dieser Vorteil tritt besonders hervor, wenn z.B. Kinderzimmer mit selektierten Programmen versorgt werden sollen, zugleich aber der beliebige und unkontrollierte Zugriff zu anderen Programmen den Kindern verwehrt bleiben soll.This advantage is particularly evident if, for example, a child's room is with selected programs should be supplied, but at the same time any and Uncontrolled access to other programs should be denied to children.
Für die individuelle Einstellung von Helligkeit und Lautstärke in den sekundär versorgten Räumen bestehen verschiedene Möglichkeiten. Vorzugsweise kann der Verteilanschluß für die Entnahme des Video- und NF-Signals mit zusatzlichen Einstellreglern zumindest für Helligkeit und Lautstärke ausgerüstet werden, bedarfsweise auch mit weiteren Einstellreglern. Daneben kommt auch eine entsprechende Ausrüstung von Bildmonitor und Lautsprecherboxen mit den für unerläßlich erachteten Regelorganen infrage. Dabei erscheint andererseits äußerste Beschränkung geboten, um den Aufwand in der Grundausstattung der Bildmonitore und Lautsprecherboxen klein zu halten.For the individual adjustment of brightness and volume in There are various options for the rooms with secondary supplies. Preferably the distribution connection for the extraction of the video and audio signals can also be used Adjustment controls are equipped at least for brightness and volume, if necessary also with further adjustment controls. In addition, there is also appropriate equipment of picture monitor and loudspeaker boxes with the regulating organs considered indispensable in question. On the other hand, it seems to be necessary to limit the effort to keep the basic equipment of the picture monitors and loudspeaker boxes small.
Eine andere Erfindungsweiterbildung beinhaltet, daß die Bildmonitore zusätzlich mit einem Anzeigedisplay und/oder einem Hilfslautsprecher versehen sind.Another development of the invention involves the image monitors are additionally provided with a display and / or an auxiliary loudspeaker.
Mit der individuellen Programm- bzw. Kanal-, sowie Programm-.With the individual program or channel as well as program.
quellenanzeige werden diesbeziigtiche Rückfragen am Ort des Programmquellenzentrums verm'i.eden, die erfahrungsgemäß im Verlauf einer längeren Benutzungszeit häufig aufkommen. Mit dem Hilfslautsprecher im Bildmonitor wird erreicht, daß auch ohne Vorhandensein separaterLautsprecherboxen, zumindestens monophon eine vollständige Übertragung von Video- (FBÄS)-S-ignal und Ton (-NF)-Signal erfolgen kann. Der ggfls. dazu erforderliche NF-Le i stutigsverstärker kann entwesier im Bildmonitor selbst oder aber auch im ProgrammqL1el enzntrum untergebracht sein. Bei Benutzung getrennter Lautsprecherboxen wird alternativ vorgeschlagen, diese al Aktiv-Lautsprecher auszubilden, die auch den Lautstärkesteller und evtl. weitere Einstellregler enthalten.Queries regarding this will be made at the location of the program source center avoid that, experience has shown, often over the course of a longer period of use come up. With the auxiliary loudspeaker in the picture monitor is achieved that even without Presence of separate loudspeaker boxes, at least one complete monophonic Transmission of video (FBÄS) -S-ignal and sound (-NF) signal can take place. The possibly. The audio amplifier required for this can deesier in the image monitor itself or it can also be accommodated in the program element. at The use of separate loudspeaker boxes is suggested as an alternative, these al active loudspeakers train, which also contain the volume control and possibly other adjustment controls.
Die folgende Weiterbildung betrifft eine Audio-Video-Heimanlage der zuvor beschriebenen Art, jedoch mit Fernbedienung.The following development relates to an audio-video home system from previously described, but with remote control.
Die Ausgestaltung der Erfindung liegt darin1 daß in den nur mit Bildmonitor und/oder Lautsprecherboxen ausgestatteten Räumen je ein weiterer Fernbedienungsempfänger vorgesehen und über Kabel mit dem Fernbedienungsdecoder des Empfangs-und Programmquellen-Zentrums verhunden ist. The embodiment of the invention is that in the only with a picture monitor and / or loudspeaker boxes equipped rooms each have a further remote control receiver provided and via cable with the remote control decoder of the reception and program source center is married.
Nach der DOS 2917078 i;t bereits bekannt, mit einer Hi--Fi-Anlage mehrere mit weiteren Lautsprechern ausgestattete-Räume zu versorgen und in den weiteren Räume. zusätzliche Fernbedienempfänger vorzusehen, die mit dem Fernbedienempfanger der zentralen Hi-Fi-Anlage parallel geschaltet sind. Die Hi-Fiw Anlage kann somit auch von den weitere, nur mit Lautsprechern ausgestatteten Raume aus fernbedient werden.According to DOS 2917078 i; t already known with a hi-fi system to supply several rooms equipped with further loudspeakers and in the others Spaces. additional remote control receivers to be provided with the remote control receiver connected in parallel to the central hi-fi system. The hi-fi system can thus also remotely controlled from the other rooms, which are only equipped with loudspeakers will.
Im hier vorliegenden Fall wird die Funktion der Fernbedienung vorschlagsweise so erweitert, daß nicht nur eine parallele, alternative Fernbedienung ermöglicht wird, sondern daß in den weiteren Räumen auch unterschiedliche Programme ausgewählt und hinsichtlich der Bild- und Tonqualitat voneinander unabhangig fernbedienbar eingestellt werden können. Dabei wird vorausgesetzt, dan das Empfangs- und Progrmmquellen-Zentrum mit den erforderlichen Signal-Verstarkern für Bild und Ton ausgestattet ist. In the present case, the function of the remote control is suggested so expanded that not only enables a parallel, alternative remote control but that different programs are selected in the other rooms and independently remote controllable in terms of picture and sound quality can be adjusted. It is assumed that the reception and program source center is equipped with the necessary signal amplifiers for picture and sound.
Des weiteren wird vorschlagsweise von einer mit Mikroprozessoren gesteuerten Fernbedienung ausgegangen, die sich überschneidende Befehle aus mehreren Räumen im Detail nacheinander verarbeitet, infolge der hohen Taktfolge jedoch praktisch gleichzeitig die Ausführung bewerkstelligt. Furthermore, it is proposed to use one with microprocessors controlled remote control assumed the overlapping commands from several Rooms processed in detail one after the other, but practical due to the high cycle rate at the same time accomplished the execution.
Darüberhinaus wird vorgeschlagen, dan die weiteren Fernbedienempfänger in den nur mit Bildmonitor und/oder Lautsprecherboxen ausgestatteten Räumen in den jeweiligen Bildmonitor oder eine der Lautspreclerboxen integriert sind. Mit dieser Maßnahme ergibt sich außer der damit verbundenen Platzerspa rn is eine einfachere Verkabelung zum Empfangs- und Programmquellen-Zentrum im Hauptraum.In addition, it is proposed to use the other remote control receivers in the rooms only equipped with a video monitor and / or loudspeaker boxes in the respective picture monitor or one of the loudspeaker boxes are integrated. With this In addition to the associated space saving, the result is a simpler one Cabling to the reception and source center in the main room.
Eine ander Erfindungsweiterbildung hat zum Gegenstand, daß eine der Knmponenten einen zusätzlichen Bildmonitor und/oder Hilfslautsprecher enthält, der für die Programmüberwachung der auf verschiedene Räume verteilten Bild- und/odar Tonprogrammc genutzt wird. Es ist zwar ohne weiteres möglich, eine etwa gewunschte Programmuberwachung vom Ort des Empfangs-und Programm(luellerl-Zentrumt aus in der Weise vorzunehmen, daß in diesem Raum auf die gleiche Programmquelle umgeschaltet wird, die in dem zu überwachenden Raum eingeschaltet ist. Dabei wird zwangsläufig das ggfls. abweichende, aber gewünschte Programm unterbrochen.Another development of the invention has the object that one of the Component contains an additional picture monitor and / or auxiliary loudspeaker, the for the program monitoring of the image and / or odar distributed in different rooms Tonprogrammc is used. It is possible without further ado, a desired one Program monitoring from the location of the reception and program (luellerl center in the Way to make that switched to the same program source in this room that is switched on in the room to be monitored. Doing so will inevitably the possibly. different but desired program interrupted.
Mit dem vorgeschlagenen, zusätzlichen Bildmonitor bzw. Hilfslautsprecher, der in eine der Komponenten des Empfangs- und Programmquellen-Zentrums integriert sein kann, wird dieser Nachteil vermieden. Im übrigen ergibt sich der Vorteil, daß die Überwachung, zumindest vidoseitig, ständig bestehen bleiben kann, ohne den regulären Empfang zu stören.With the suggested, additional picture monitor or auxiliary loudspeaker, which is integrated into one of the components of the reception and program source center this disadvantage is avoided. In addition, there is the advantage that the surveillance, at least on the video side, can remain constant without the regular one To disrupt reception.
Die weitere Ausgetaltung der Erfindung bezieht sich auf-das neue Medium der Text-Kommunikation wie z.B. Bildschirmtext und äquivalente Dienste. Der Inhalt dieses Vorschlages liegt darin, daß in das Empfangs- und Progr;tmmquellenZ'entrum eine weitere Komponente für die passive und bedarfsweise aktive' Textkommunikation eingefügt ist, welche sowohl die Decodiereinrichtung fur den Text empfang als auch bedarfsweise eine Eingabetastatur, einen Drucker und einen zusiitzlichen Bildmonitor enthalt.The further embodiment of the invention relates to the new medium text communication such as screen text and equivalent services. The content This suggestion is that in the reception and program source center Another component for passive and, if necessary, active 'text communication is inserted, which both the decoder for the text received and if necessary an input keyboard, a printer and an additional image monitor contains.
Zumindest in der Einführungsphase der neuen Text-Kommunikationsdienste bietet ihre Integration in das Empfangs und Programmquellen-Zentrum der erfindungsgemäßen Audio-'VideoHeimanlage den Vorteil erhebl i cher Kosteneinsparung, da die vorhandenen Furlktionscinheiten wie z.B. der Bildmonitor alternativ mit benutzt werden können. Die weitere Komponente mit der zusätzlichen Elektronik läßt s-ich sowohl funktionell als auch designseitig problemlos in das Empfangs- und Programmquellen-Zentrum einfügen. Bei dessen Ausführung als Rack bietet sich an, die Eingabetastatur ggfls. zusammen mit dem zusätz ichen Monitor zusammenzufassen und an oberster Position bedichungsgünstig zu plazieren.At least in the introductory phase of the new text communication services offers their integration in the reception and program source center of the invention Audio and video home systems have the advantage of considerable cost savings as the existing Functional units such as the image monitor can also be used as an alternative. The other components with the additional electronics are functional as well and can be easily integrated into the reception and program source center on the design side. When it is designed as a rack, it is advisable to use the input keyboard. together to be combined with the additional monitor and in the uppermost position for easy access to place.
Bei einer so erweiterten Anlage wird ferner voryeschlagen, daß der für die Textkommunikation bedarfsweise vorhandene zusätzliche Bildmonitor zugleich zwar die Überwachung der auf verschiedene Raume verteilten Bildprogramme benutzt wird. Da weder die Textkommunikatiot, noch die Programmüberwachung eine etwa mit dem regulären Fernseh/Video-Betrieb v.ergleichbara Nutzungszeit erreichen wird, erscheint es sintlvoll, auf separate, zusätzliche Monitore hier zu vrzichten.In the case of such an expanded system, it is also suggested that the for text communication, if necessary, additional image monitor is also available used to monitor the image programs distributed across different rooms will. Since neither the text communication nor the program monitoring have anything to do with will reach the regular television / video operation v. comparable usage time, it seems sensible to do without separate, additional monitors here.
Weitere Merkmale der erfindungsgemäßen Audio-Video-Heimanlage beziehen sich auf Konstruktion und Design. Diesbezüglich ist vorgesehen, daß die Einzelkomponenten mit geeigneten konstruktiven Einrichtungerl derart versehen sind, daß sie sowohl nebeneinander als auch übereinarlder form- oder kraftschlüssig kombinierbar sind, und daß außerdem durch die Formgebung das Zusammenwirken der in den Komponenterl verfügbaren Medien hervorgehoben wird.Refer to other features of the audio-video home system according to the invention focus on construction and design. In this regard, it is provided that the individual components are provided with suitable structural devices such that they both next to each other as well as on top of each other, which can be combined positively or non-positively, and that also the interaction of the components in the components available media is highlighted.
Die Vielzahl der funktionell unterschiedlichen Komponenten aus den Bereichen Fernsehen, Video, HiFi und Text-Kommunikationen erfordert entsprechend klar gegliederte und flexibel gestaltete konstruktive Maßnahmen, um ZU einer technisch überschaubaren und den unterschiedlichen Gestaltungswünschen entsprechenden-Lösung zu kommen. Das betrifft vor allem entsprechende Passungsvorrichtungen sowohl an Decke und Boden, als auch an den Seitenwänden der Komponenten, damit je nach der Gesamtanzahl der verwendeten Komponenten eine optisch ansprechende Positionierung nebeneinander oder/und übereinander gewählt werden kann. Dabei wird die Übersicht durch entsprechende Frontgestaltung unter Bezug auf die verschiedenen Medien in der Weise verbessert, dan die Bedienelemente, funktionell auf die Frontflächen verteilt ud die Signalverläufe erkennbar sind.The multitude of functionally different components from the Television, video, hi-fi and text communications requires accordingly clearly structured and flexibly designed constructive measures in order to achieve a technical manageable and a solution corresponding to the different design requirements get. This applies above all to the corresponding fitting devices Ceiling and floor, as well as on the side walls of the components, depending on the Total number of components used, a visually appealing positioning next to each other and / or above each other can be selected. Thereby the overview through appropriate front design with reference to the various media in the way it is improved, because the controls are functionally distributed over the front surfaces ud the signal curves are recognizable.
Als weitere Variante ist vorgesehen, daß die Einzelkomponenten hinsichtlich ihrer Bedien- und Einstellfunktionen durch-eine gemeinsame Abdeckung zusammengefaßt sind.As a further variant, it is provided that the individual components with regard to their operating and setting functions combined by a common cover are.
Eine gemeinsame Abdeckung mehrerer Komponenten erscheint be-" sonders dann sinnvoll, wenn eine bestimmte Ausbaustufe der Anlage fest vorgegeben ist und der Charakter als kompakte Geräteeinheit betont werden soll. Die dann möglich, einfachere konstruktive Ausführung der entsprechenden Komponenten ohne Einzelfronten ermöglicht entsprechende Einsparungen.A common coverage of several components appears to be special makes sense if a certain expansion stage of the system is fixed and the character as a compact device unit should be emphasized. The simpler ones then possible constructive execution of the corresponding components without individual fronts enables corresponding savings.
Die in den Abbildungen benutzten Kennziffern sind den dargestellten Geräte rund Funktionseinheiten wie folgt zugeordnet: 1 , Komponenten-Rack 2,9 = Bildmonitor 3,10 = Lautsprecherboren 4 = TV-Audio-Empfangsteil (ggfls. mit IR-Fernbedienempfänger), 5 , Hi-Fi-NF-Verstärker 6 = Video-Recorder 7 = Hi-Fi-Cassetten-Recorder 8 , Hi-Fi-Plattenspieler 11 = Bildmonitor mit Anzeige-Display und Hilfslautsprecher 12, 13, 15r lnfrarot-Fernbedien-Geber (ender) 14 w Infrarot-Empfänger für Fernbediensignale 16 = Bildmonitor für Textkommunikation 17 = EingabetastaturThe code numbers used in the figures are those shown Devices around functional units assigned as follows: 1, component rack 2.9 = Image monitor 3,10 = loudspeaker bores 4 = TV audio receiver (if necessary with IR remote control receiver), 5, hi-fi audio amplifier 6 = video recorder 7 = hi-fi cassette recorder 8, hi-fi record player 11 = image monitor with display and auxiliary loudspeaker 12, 13, 15r infrared remote control transmitter (ender) 14 w infrared receiver for remote control signals 16 = image monitor for text communication 17 = input keyboard
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE19813151492 DE3151492A1 (en) | 1981-11-21 | 1981-12-24 | Audio/video home system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE19813146173 DE3146173C2 (en) | 1981-11-21 | 1981-11-21 | Television receiving system with a picture display monitor, a combined or separate sound reproduction part and a separate receiver part |
DE19813151492 DE3151492A1 (en) | 1981-11-21 | 1981-12-24 | Audio/video home system |
Publications (1)
Publication Number | Publication Date |
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DE3151492A1 true DE3151492A1 (en) | 1983-07-07 |
Family
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Application Number | Title | Priority Date | Filing Date |
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DE19813151492 Withdrawn DE3151492A1 (en) | 1981-11-21 | 1981-12-24 | Audio/video home system |
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