WO1989011199A1 - Censure automatique de programmes diffuses - Google Patents

Censure automatique de programmes diffuses Download PDF

Info

Publication number
WO1989011199A1
WO1989011199A1 PCT/AU1989/000189 AU8900189W WO8911199A1 WO 1989011199 A1 WO1989011199 A1 WO 1989011199A1 AU 8900189 W AU8900189 W AU 8900189W WO 8911199 A1 WO8911199 A1 WO 8911199A1
Authority
WO
WIPO (PCT)
Prior art keywords
classification
message
data
censorship
programmes
Prior art date
Application number
PCT/AU1989/000189
Other languages
English (en)
Inventor
Peter Samuel Vogel
Original Assignee
Vogel Peter S
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 Vogel Peter S filed Critical Vogel Peter S
Publication of WO1989011199A1 publication Critical patent/WO1989011199A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/12—Arrangements for observation, testing or troubleshooting
    • H04H20/14—Arrangements for observation, testing or troubleshooting for monitoring programmes
    • 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
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/47—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for recognising genres
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/458—Scheduling content for creating a personalised stream, e.g. by combining a locally stored advertisement with an incoming stream; Updating operations, e.g. for OS modules ; time-related management operations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/812—Monomedia components thereof involving advertisement data
    • 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
    • H04H60/76—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet
    • H04H60/81—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by the transmission system itself
    • H04H60/90—Wireless transmission systems
    • H04H60/91—Mobile communication networks

Definitions

  • broadcast programme refers to broadcast television programmes, radio programmes, cable television, and other forms of mass distribution of audio and/or video programmes.
  • censorship of video material is generally accepted by most societies, for the purposes of preventing the viewing of material by persons other than the target audience.
  • censorship takes the form of limiting access of a certain group of people, for example children, to a certain class of material, for example pornographic or violent movies.
  • Other uses of censorship include voluntary self-censorship in cases where a recipient of a programme does not wish to be exposed to certain types of programme, for example scenes of great violence or advertisements which may be considered offensive by some people.
  • television is the medium in which censorship is most likely to be considered a problem.
  • censorship of television takes the form of either preventing possibly offensive material from being broadcast in the first place, or voluntary self-censorship, that is, switching off the receiver when material which the viewer does not wish to experience is being broadcast. While such self-censorship offers the benefit that programmes remain available to those who do not find them objectionable, it suffers from the inconvenience of having to anticipate the nature of broadcasts and operate the receiver appropriately. This process is tedious and error-prone, especially where the viewer wishes to suppress programme material which changes rapidly in nature, for example when the viewer desires to suppress commercial messages within an otherwise unobjectionable programme. Manual censorship is therefore not an entirely satisfactory solution. Another factor which renders manual censorship ineffective is the increasingly common use of videotape recorders for recording programmes for later replay. If an operator is present at the time of recording, unwanted programme can be suppressed by "pausing" the video recorder when appropriate, but in many cases such recording takes place unattended and at these times such manual censorship is not possible.
  • a much improved censorship means is disclosed by Von Kohorn in United States Patent number 4,520,404.
  • This system relies on a human operator to classify broadcasts, based on observation at a monitoring station.
  • a suitably coded message is distributed from the monitoring station to the viewer's home, at which point a suitably-equipped decoder controls the television receiver or video recorder in accordance with the classification data generated by the human operator at the monitoring station.
  • this invention significantly improves upon the reliability of previous methods, it nevertheless suffers from a number of significant limitations.
  • an automatic censorship method capable of automatically censoring broadcast programmes which does not require the establishment of a special broadcasting means or the cooperation of the broadcaster from whom the programmes originate, comprising the steps of monitoring broadcasts originating from at least one source, classifying programmes according to their content, generating a message describing the classification of the current programme, conveying said message to a data message transmitting station, temporarily suspending data messages (if any) being transmitted, transmitting said classification message, receiving said classification message at a plurality of receiving stations at which the classified programmes are being viewed or recorded, decoding said message and, according to functions selected by the operator at the receiving station, controlling the reception, display, audition or recording of the classified programmes.
  • data message refers to signals conveying information of a non-time-critical nature, that is, signals which convey information and can be interrupted for short periods, say one second, without significantly detracting from the quality or effectiveness of the transmission.
  • data messages include transmissions to pocket-paging receivers, teletext data or financial information being continuously transmitted to a group of subscriber stations.
  • apparatus for automatically censoring broadcast programmes comprises means for monitoring broadcasts originating from at least one source, means for generating a message describing the classification of the current programme according to classifications determined by an operator performing the monitoring, means for conveying said message to a data message transmitting station, a controller equipped to temporarily suspend messages (if any) being transmitted, radio transmitter means for transmitting said classification message, receivers which receive said classification message at a plurality of receiving stations at which the classified programmes are being viewed or recorded, means to decode said message and, according to functions selected by the operator at the receiving station, for controlling the reception, display, audition or recording of the classified programmes.
  • the invention also consists in transmission means as defined in the previous paragraph.
  • An important application is to a system in which monitoring of broadcasts from a plurality of sources occurs. Embodiments of the invention can readily provide such a feature.
  • Another further inventive feature which is used in preferred embodiments of the invention is an arrangement by which the monitoring is performed by two or more persons each of whom independently classifies programmes according to their content; the system automatically generates a message describing the current classification according to the classification selected by a majority of the monitoring persons.
  • Fig. 1 is a schematic block diagram of an embodiment of the present invention
  • Fig. 2 is a schematic block diagram of a suitable arrangement of the data transmitter of Fig. 1 ;
  • Fig. 3 is a schematic block diagram of an alternative monitoring arrangement suitable for use with the invention. MODE FOR CARRYING OUT THE INVENTION
  • programme source 101 is a videotape recorder, television camera, television studio or other source of video programme.
  • Classification encoder 102 is an encoder comprising a keyboard by means of which a censorship classification can be entered by the operator and encoding means which translates the entered classification into a unique digital word.
  • Classification encoder 102 can also comprise means for inputting information defining to which channel of broadcast the entered classification data relates.
  • the data message transmitter of the invention is a paging system transmitter (referred to hereinafter as data transmitter 114), as commonly used in pocket-paging services, whereby on transmission of suitable address codes, portable receivers are activated to beep or display messages, alerting the user carrying the receiver.
  • the output of classification encoder 102 is fed to data transmitter 114.
  • Said transmitter is also equipped to receive data from paging terminal 113, which is a conventional paging terminal into which messages to be transmitted to remotely-located paging receivers are entered by an operator. Operation of the paging system is carried out according to any of the methods well known to the art, except that data from classification encoderl02 is interleaved with data from paging terminal 113. Interleaving of paging and classification data is performed according to a scheme which ensures that classification data does not interfere with the operation of the paging system and that paging data does not interfere with operation of the classification and censorship system.
  • One suitable embodiment of data transmitter 114 is shown in the schematic drawing Fig. 2, described in detail below.
  • the programme from programme source 101 is transmitted to the point of viewing or recording via programme transmission means 103.
  • the censorship classification signal interleaved with paging signals is transmitted to the same destination via data transmission means 112.
  • Radio receiver 115 receives both paging and classification signals and feeds the demodulated data to classification detector 106 which is equipped to ignore paging signals but to extract and process classification signals.
  • Censorship controller 107 receives the extracted classification word, and compares it with a range of classifications previously entered by the operator using user interface 108. If the current classification matches one of those selected to be censored by the operator, censor output 109 activates control input 110 of the video tape recorder and/or control input 111 of the television receiver, causing certain automatic censorship actions to happen.
  • the desired actions are selected by the operator and can include the following examples: a) Inhibit reception of both sound and picture Example: television only receives programmes suitable for children b) Mute sound but continue displaying picture Example: remove sound during advertisements c) Blank picture but continue sound Example: Remove visual content from news programmes d) Switch to alternative programme
  • the censorship action can be predetermined by the arrangement of the apparatus.
  • classification encoder 102 can be equipped to produce channel- specific classification data at its output, and censorship controller 107 can be equipped to activate censor output 109 only if the corresponding channel is being viewed or recorded.
  • Information defining the currently active channel can be derived manually, via user interface 108, or automatically by connection to the broadcast reception means or by other techniques which may not require direct electrical connection. Referring now to Fig. 2, detail of data transmitter 114 of Fig. 1 can be seen.
  • Paging data arriving at paging data input 201 is fed to the input of FIFO buffer (first in, first out buffer) 209, before being passed via data multiplexer 212 to modulation input 203 of transmitter 204.
  • Transmitter 204 transmits a carrier, modulated accordingly, via antenna output 205.
  • Classification data is fed via classification data input 202 directly to data multiplexer 212, as well as to an input of controller 210.
  • Controller 210 is arranged so that when classification data arrives, FIFO buffer 209 is instructed, via FIFO control 211, to suspend its output, and data multiplexer 212 is instructed, via multiplex control 208, to select the classification data input 202 as the source of modulation for the transmitter.
  • paging data which may be en route to the transmitter at a time when classification data is to be transmitted will be temporarily suspended until transmission of the classification data has been completed.
  • any paging data received at paging data input 201 will be stored by FIFO buffer 209 so that it is not lost.
  • classification data which is required to be transmitted urgently, will be transmitted with precedence over paging data.
  • the small delay in completing the paging message does not materially affect the operation of the paging system.
  • the data interleaving function described above can conveniently be implemented by a microprocessor equipped with suitable software, or by an appropriate arrangement of electronic hardware.
  • this embodiment of the invention can be adapted to use the arrangement of Fig. 3, whereby a plurality of monitoring persons are used to perform the classification function.
  • each monitoring person 301-30n views a group of television monitors 311-31n, each monitor displaying the broadcast of a different television channel.
  • Each person enters the appropriate classification for each channel, or a sub-set of channels, at their own control panel 321 -32n.
  • the outputs of the control panels feed comparator 330, which generates at its output a signal 340 corresponding to the majority of inputs from the control panels.
  • a security arrangement may be provided to enable authorised persons to enable and disable the censorship of programmes.
  • this feature may be implemented by equipping censorship controller 107 with storage means within which a "personal identification number" (PIN) is stored.
  • PIN personal identification number
  • an authorised person By means of user interface 108, an authorised person, to whom the PIN is known, can enter the PIN, thereby enabling access to latches or other memory means within censorship controller 107, the state of which defines the classes of programmes which will be censored. In this way a responsible adult, for example, could upon entering the correct PIN, disable the censorship function so that material unsuitable for children could be viewed. Resumption of the usual censorship function can be effected by again entering the PIN, after a preset time delay, or upon conclusion of the programme.
  • classification detector and censorship controller are described in these embodiments as being distinct from the television reception or recording equipment, this apparatus can be incorporated within other equipment such as a television receiver, monitor, or video tape recorder.
  • control inputs 110 and 111 of Fig. 1 can be the remote control interface of the videotape recorder and/or television receiver in cases where these are equipped with remote control. That is, the censorship controller 107 is equipped with interface means compatible with the remote control communication standard, for example an infra-red transmitter, so that pausing, muting, blanking, channel- changing, or other censorship actions can be effected using unmodified recording/receiving equipment.
  • the remote control communication standard for example an infra-red transmitter
  • a video display device can be used to display the range of available censorship categories in the form of a menu, and the operator can make selections from that menu using a small number of switches, according to techniques well known to the computer art.
  • the invention can also be adapted to provide other useful control functions.
  • the invention can be arranged to cause only nominated types of material to be recorded. This capability can be used for compiling a recording of all the advertisements broadcast on a given day, or all the episodes of a particular programme broadcast over several nights.
  • the invention can also be used to control recording of pre-determined programmes by starting and stopping the VCR at the actual times of commencement and termination of the desired programme, rather than relying on the clock means commonly incorporated into VCRs for this purpose.
  • the method of control using this invention is superior in that the correct programme segment will be recorded in spite of differences between the scheduled times of programmes and their actual starting and finishing times.
  • the invention can be used to control reception or recording of television programmes according to their censorship classification.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Business, Economics & Management (AREA)
  • Marketing (AREA)
  • Radio Relay Systems (AREA)
  • Television Systems (AREA)

Abstract

Le système décrit sert à commander la réception ou l'enregistrement d'émissions de télévision en fonction de classifications de censure. Une ou plusieurs personnes surveillant des émissions fixe une classification et fait en sorte qu'un signal approprié soit émis et transmis aux domiciles des téléspectateurs au moyen d'un réseau de transmission radio également utilisé pour la transmission d'autres signaux de données, tel qu'un système de télé-appel de poche (113, 114). Des organes (209, 210, 212) sont prévus pour assurer que les signaux de classification soient transmis en priorité sur les signaux de télé-appel ou sur d'autres données à durée non critique.
PCT/AU1989/000189 1988-05-04 1989-05-03 Censure automatique de programmes diffuses WO1989011199A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPI803988 1988-05-04
AUPI8039 1988-05-04
AUPJ0278 1988-09-07
AUPJ027888 1988-09-07

Publications (1)

Publication Number Publication Date
WO1989011199A1 true WO1989011199A1 (fr) 1989-11-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1989/000189 WO1989011199A1 (fr) 1988-05-04 1989-05-03 Censure automatique de programmes diffuses

Country Status (3)

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EP (1) EP0415966A4 (fr)
JP (1) JPH03504186A (fr)
WO (1) WO1989011199A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992000654A1 (fr) * 1990-06-25 1992-01-09 Barstow David R Procede de codage et de diffusion d'informations relatives a des evenements en direct utilisant des techniques informatiques de simulation et de concordance avec un modele
FR2716327A1 (fr) * 1994-02-17 1995-08-18 Telediffusion Fse Procédé et système de programmation d'enregistrements et terminal de programmation.
WO1997039540A1 (fr) * 1996-04-12 1997-10-23 Casio Computer Co., Ltd. Systeme de radiodiffusion
FR2752131A1 (fr) * 1996-08-01 1998-02-06 Fraud Andre Occultation des programmes de television indesirables
WO1998031147A1 (fr) * 1997-01-08 1998-07-16 Soundview Technologies Incorporated Appareil de mise a niveau d'un recepteur de signaux de radiodiffusion et procede prevu a cet effet
US6081290A (en) * 1996-09-20 2000-06-27 Soundview Technologies Incorporated Broadcast signal receiver retrofit apparatus and method
US7373587B1 (en) 1990-06-25 2008-05-13 Barstow David R Representing sub-events with physical exertion actions
US8955013B2 (en) 1996-06-14 2015-02-10 Rovi Guides, Inc. Television schedule system and method of operation for multiple program occurrences
US9021538B2 (en) 1998-07-14 2015-04-28 Rovi Guides, Inc. Client-server based interactive guide with server recording
US9071872B2 (en) 2003-01-30 2015-06-30 Rovi Guides, Inc. Interactive television systems with digital video recording and adjustable reminders
US9125169B2 (en) 2011-12-23 2015-09-01 Rovi Guides, Inc. Methods and systems for performing actions based on location-based rules
US9294799B2 (en) 2000-10-11 2016-03-22 Rovi Guides, Inc. Systems and methods for providing storage of data on servers in an on-demand media delivery system
US9414119B2 (en) 1996-05-29 2016-08-09 Rovi Guides, Inc. Television schedule system with access control
US10063934B2 (en) 2008-11-25 2018-08-28 Rovi Technologies Corporation Reducing unicast session duration with restart TV

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE504237C2 (sv) * 1995-04-27 1996-12-16 Cetronic Ab Förfarande för att selektivt utsända information
TW416224B (en) * 1998-07-07 2000-12-21 United Video Properties Inc Interactive television program guide system with local advertisements

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US4163253A (en) * 1976-03-23 1979-07-31 Sony Corporation Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof
US4228543A (en) * 1978-03-24 1980-10-14 Jackson Joseph N Programmable television receiver controllers
US4305101A (en) * 1979-04-16 1981-12-08 Codart, Inc. Method and apparatus for selectively recording a broadcast
WO1983002208A1 (fr) * 1981-12-19 1983-06-23 Frederick William Chard Procede et dispositif permettant d'eliminer des sequences d'un programme de television
AU2162983A (en) * 1982-11-25 1984-05-31 N.V. Philips Gloeilampenfabrieken Programmable receiver control
WO1984003166A1 (fr) * 1983-02-09 1984-08-16 Sisex Soc Int Servic Export Dispositif de protection de bandes magnetiques, ou autres supports d'enregistrement, ou d'emissions de television ou de radio contre la lecture et/ou la reproduction non autorisees
EP0179001A2 (fr) * 1984-10-19 1986-04-23 Francis Fabien Michel Muguet Procédé et dispositif d'acquisition, de mémorisation et de transmission de données spécialisées, relatives notamment à l'enregistrement des émissions, entre un appareil de type magnétoscope et un centre de traitement
US4768229A (en) * 1986-07-21 1988-08-30 Zenith Electronics Corporation Restrictive access control system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163253A (en) * 1976-03-23 1979-07-31 Sony Corporation Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof
US4228543A (en) * 1978-03-24 1980-10-14 Jackson Joseph N Programmable television receiver controllers
US4305101A (en) * 1979-04-16 1981-12-08 Codart, Inc. Method and apparatus for selectively recording a broadcast
WO1983002208A1 (fr) * 1981-12-19 1983-06-23 Frederick William Chard Procede et dispositif permettant d'eliminer des sequences d'un programme de television
AU2162983A (en) * 1982-11-25 1984-05-31 N.V. Philips Gloeilampenfabrieken Programmable receiver control
WO1984003166A1 (fr) * 1983-02-09 1984-08-16 Sisex Soc Int Servic Export Dispositif de protection de bandes magnetiques, ou autres supports d'enregistrement, ou d'emissions de television ou de radio contre la lecture et/ou la reproduction non autorisees
EP0179001A2 (fr) * 1984-10-19 1986-04-23 Francis Fabien Michel Muguet Procédé et dispositif d'acquisition, de mémorisation et de transmission de données spécialisées, relatives notamment à l'enregistrement des émissions, entre un appareil de type magnétoscope et un centre de traitement
US4768229A (en) * 1986-07-21 1988-08-30 Zenith Electronics Corporation Restrictive access control system

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992000654A1 (fr) * 1990-06-25 1992-01-09 Barstow David R Procede de codage et de diffusion d'informations relatives a des evenements en direct utilisant des techniques informatiques de simulation et de concordance avec un modele
US7373587B1 (en) 1990-06-25 2008-05-13 Barstow David R Representing sub-events with physical exertion actions
FR2716327A1 (fr) * 1994-02-17 1995-08-18 Telediffusion Fse Procédé et système de programmation d'enregistrements et terminal de programmation.
EP0668698A1 (fr) * 1994-02-17 1995-08-23 Telediffusion De France Procédé et système de programmation d'enregistrement et terminal de programmation
WO1997039540A1 (fr) * 1996-04-12 1997-10-23 Casio Computer Co., Ltd. Systeme de radiodiffusion
US9414119B2 (en) 1996-05-29 2016-08-09 Rovi Guides, Inc. Television schedule system with access control
US8955013B2 (en) 1996-06-14 2015-02-10 Rovi Guides, Inc. Television schedule system and method of operation for multiple program occurrences
FR2752131A1 (fr) * 1996-08-01 1998-02-06 Fraud Andre Occultation des programmes de television indesirables
US6020910A (en) * 1996-09-20 2000-02-01 Soundview Technologies Incorporated Broadcast signal receiver retrofit apparatus and method
US6081290A (en) * 1996-09-20 2000-06-27 Soundview Technologies Incorporated Broadcast signal receiver retrofit apparatus and method
US6128031A (en) * 1996-09-20 2000-10-03 Soundview Technologies Incorporated Broadcast signal receiver retrofit apparatus and method
WO1998031147A1 (fr) * 1997-01-08 1998-07-16 Soundview Technologies Incorporated Appareil de mise a niveau d'un recepteur de signaux de radiodiffusion et procede prevu a cet effet
US9055318B2 (en) 1998-07-14 2015-06-09 Rovi Guides, Inc. Client-server based interactive guide with server storage
US9055319B2 (en) 1998-07-14 2015-06-09 Rovi Guides, Inc. Interactive guide with recording
US9118948B2 (en) 1998-07-14 2015-08-25 Rovi Guides, Inc. Client-server based interactive guide with server recording
US9154843B2 (en) 1998-07-14 2015-10-06 Rovi Guides, Inc. Client-server based interactive guide with server recording
US9226006B2 (en) 1998-07-14 2015-12-29 Rovi Guides, Inc. Client-server based interactive guide with server recording
US9232254B2 (en) 1998-07-14 2016-01-05 Rovi Guides, Inc. Client-server based interactive television guide with server recording
US9021538B2 (en) 1998-07-14 2015-04-28 Rovi Guides, Inc. Client-server based interactive guide with server recording
US10075746B2 (en) 1998-07-14 2018-09-11 Rovi Guides, Inc. Client-server based interactive television guide with server recording
US9294799B2 (en) 2000-10-11 2016-03-22 Rovi Guides, Inc. Systems and methods for providing storage of data on servers in an on-demand media delivery system
US9071872B2 (en) 2003-01-30 2015-06-30 Rovi Guides, Inc. Interactive television systems with digital video recording and adjustable reminders
US9369741B2 (en) 2003-01-30 2016-06-14 Rovi Guides, Inc. Interactive television systems with digital video recording and adjustable reminders
US10063934B2 (en) 2008-11-25 2018-08-28 Rovi Technologies Corporation Reducing unicast session duration with restart TV
US9125169B2 (en) 2011-12-23 2015-09-01 Rovi Guides, Inc. Methods and systems for performing actions based on location-based rules

Also Published As

Publication number Publication date
JPH03504186A (ja) 1991-09-12
EP0415966A4 (en) 1992-04-01
EP0415966A1 (fr) 1991-03-13

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