EP2034639B1 - Automatische TV/Audio-Kanalumschaltung beim Empfang von Informationen über bestimmte Steuerungskanäle - Google Patents

Automatische TV/Audio-Kanalumschaltung beim Empfang von Informationen über bestimmte Steuerungskanäle Download PDF

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Publication number
EP2034639B1
EP2034639B1 EP07017325.7A EP07017325A EP2034639B1 EP 2034639 B1 EP2034639 B1 EP 2034639B1 EP 07017325 A EP07017325 A EP 07017325A EP 2034639 B1 EP2034639 B1 EP 2034639B1
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Prior art keywords
channel
virtual
virtual channel
normal
control channel
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English (en)
French (fr)
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EP2034639A1 (de
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Jorge Luis Veiga
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Nokia Solutions and Networks Oy
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Nokia Solutions and Networks Oy
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/26—Arrangements for switching distribution systems

Definitions

  • the invention relates to the field of communication broadcast.
  • the invention relates to a method for providing a virtual channel for a receiving station, a receiving station and a communication system.
  • the document US-A-5 359 601 (WASILEWSKI ANTHONY J [US] ET AL) 25 October 1994 (1994-10-25) describes an apparatus providing dynamic virtual service selection in a multi-service communications system.
  • a dynamic virtual service map is provided that defines for each dynamic virtual service, on a time - varying basis, the currently active one of the group of basic services that comprise that virtual service.
  • the apparatus provides means for receiving and accessing the service components of a selected basic service from the frequency channel carrying those components.
  • Dynamic virtual service map definitions are periodically re-transmitted to the apparatus on each frequency channel carrying service components of one of the group of basic services that comprise that dynamic virtual channel.
  • a home basic service may be defined for each virtual dynamic service. When a dynamic virtual service is initially selected by a subscriber, the apparatus initially tunes to the frequency channel carrying the service components of that home basic service.
  • TV/audio channels may comprise, for example, news, sports, science, entertainment or music data.
  • Such a program search may especially be performed during or after system power up or at the end or interval of the program they were seeing/listening to. This may normally result in the viewer/listener having to manually switch (zap) possibly many channels in order to find what he/she prefers.
  • the invention provides a method for providing a virtual channel for a receiving station, a receiving station and a communication system with the features according to the independent claims.
  • a method for providing a virtual channel for a receiving station comprising the steps of receiving information from a virtual channel control channel in the receiving station and automatically switching to a normal channel on the basis of the information from the virtual channel control channel, wherein the information comprises a channel reference corresponding to a normal channel and wherein the information is transmitted from a transmitting station to the receiving station via the virtual channel control channel.
  • the method may provide for an automated channel selection (switching) which is for example triggered by an external entity, such as an individual person or a company. Therefore, the channel switching is triggered automatically at the TV/audio system for example Internet protocol television (IPTV, radio system) by the external entity under permission of the viewer/listener which previously and explicitly requested/accepted such a service.
  • switching switching
  • IPTV Internet protocol television
  • the viewer/listener may be able to select his preferred virtual channel (for example rock star Y music selection) resulting from timely change of "normal" available or subscribed broadcast channel (such as, for example, MTV, Viva, VH1, history channel musician biographies, ...), following a certain general or more specific subject and whose program/channel choice may for example normally but not necessarily be produced in real or near real time by the external entity.
  • his preferred virtual channel for example rock star Y music selection
  • a method may be provided that may make it possible for viewers or listeners to be able to view or listen to those virtual channels. Furthermore, the method according to an aspect of the invention provides the steps a multimedia operator (such as, for example, IPTV or radio operators) have to perform in order to provide such services from the system that supports such services.
  • a multimedia operator such as, for example, IPTV or radio operators
  • the set top box (STB) or any enhanced video/audio receiver like a TV set would, at customer premise, tune to the specific "virtual channel” control channel, which may constantly simply broadcast the virtual channels "normal” channel choice to be viewed/listened to at the moment and then automatically switches/tunes to that channel choice, which may change over time, thus requiring the STB to retune.
  • STB set top box
  • Such "virtual channel" control channel choices may, according to an exemplary embodiment of the present invention, be produced from external entities, which may be dedicated companies, such as, for example, child education companies, or interest groups, such as, for example anti-violence media association, or individuals, such as, for example, rock star Y preference.
  • external entities such as, for example, child education companies, or interest groups, such as, for example anti-violence media association, or individuals, such as, for example, rock star Y preference.
  • the receiving station comprises at least one of a television apparatus for visualizing television programs, a set top box, and a radio apparatus for playing a radio digital broadcast.
  • the present invention is not limited to television programs, but may also be applied to other multicast protocols.
  • the invention is not limited to the Internet group management protocol (IGMP).
  • IGMP Internet group management protocol
  • the information transmitted in the virtual channel control channel is generated by an external entity selected from the group comprising a dedicated company, an interest group, and an individual.
  • an individual may provide the information transmitted by the virtual channel control channel to the receiving station.
  • the receiving station can then automatically switch to the normal channel suggested by the individual.
  • the virtual channel control channel is transmitted continuously to the receiving station, such that the automatic switching to the normal channel can be performed in real time or near real time.
  • the user is for example able to automatically follow the program selection of the external entity immediately.
  • the receiving station is adapted for recognizing the virtual channel control channel as a special channel which differs from a normal channel.
  • the virtual channel control channel comprises a plurality of individual channel references, each reference corresponding to a respective normal channel.
  • the receiving station allows for a selection of the virtual channel control channel by a user.
  • the user may be able to choose between a plurality of different virtual channel control channels or virtual channels, each virtual channel control channel corresponding to an individual external entity.
  • a receiving station for providing a virtual channel.
  • the receiving station is adapted for receiving information from a virtual channel control channel and for automatically switching to a normal channel on the basis of the information from the virtual channel control channel, wherein the information comprises a channel reference corresponding to a normal channel, and wherein the information is transmitted from a transmitting station to the receiving station via the virtual channel control channel.
  • the receiving station is adapted for identifying the virtual channel control channel.
  • a communication system for providing a virtual channel comprising a transmitting station and a receiving station.
  • the transmitting station is adapted for transmitting information via a virtual channel control channel, the information comprising a channel reference corresponding to a normal channel to the receiving station.
  • the receiving station is adapted for receiving the information from the virtual channel control channel and for automatically switching to a normal channel on the basis of the information from the virtual channel control channel.
  • switching to the normal channel is performed automatically, triggered by the external entity. Therefore, the user for example only has to switch on his receiving station (for example by switching on a set top box) and tune to the virtual channel control channel. Then, the receiving station receives the channel references (channel information) transmitted via the virtual channel control channel and tunes to the respective identified normal channel automatically, without further user interaction being necessary.
  • channel references channel information
  • Fig. 1 shows a schematic representation of a multicast network, in which a receiving station according to an exemplary embodiment of the present invention is implemented.
  • this approach is based on viewer habits (such as previously seen programs, for example) or preferences configuration (e.g., the user likes action movies), and the channel switching procedure follows an algorithm that is run at the STB, not an external source like a dedicated company, group of interest or individual.
  • This approach may still require lots of interaction from the viewer to accept or deny the suggestions that appear as possible viewer interesting programs begin or about to begin.
  • Channel switching at STB is based on the information provided by the electronic program guide (EPG) regarding the category of each program and its starting/ending time.
  • EPG electronic program guide
  • the above discussed known method may not provide the real-time or near real-time virtual channel control suggestion according to what is really being transmitted, but only according to what has been publicized.
  • the prior art radio broadcast system via its RDS may allow a similar functionality as the above known method, but not the functionality described by this invention.
  • the multicast network comprises a TV/audio head end or transmitting station 101, which is adapted for transmitting broadcast data to an IGMP multicast router 102, for example via transmission line 113.
  • the multicast network 100 is adapted for transmitting this data via the Internet 103 to a digital subscriber line axis multiplexer (DSLAM) 104.
  • DSLAM digital subscriber line axis multiplexer
  • the DSLAM is adapted for transmitting the data to multiple set top boxes 105, 106, which are configured as Internet group management protocol (IGMP) hosts.
  • IGMP Internet group management protocol
  • Each set top box 105, 106 is for example connected to a TV 107, 110, to a telephone 108, 111 and/or to a computer 109/112.
  • the data transmission between the set top boxes 105, 106 and the DSLAM is performed via communication lines 114, 115, respectively.
  • Communication between the receiving stations 105, 106 and the transmitting station 101 may be performed bi-directionally, i.e. in the IGMP join messages directions 116 or in the forwarding multicast streams direction 117.
  • IPTV network depicted in Fig. 1 comprises the STB (Set Top Box)105 at a customer premise and the TV/Audio Head End 101 that collects the channels from the different channel providers and makes them available to the viewer/listeners.
  • STB Set Top Box
  • TV/Audio Head End 101 collects the channels from the different channel providers and makes them available to the viewer/listeners.
  • IGMP protocol is an example for a multicast protocol, and is a commonly used protocol.
  • 106 Normally at start up the STB 105, 106 would tune (e.g., IGMP Join request) to the Announcements multicast channel, and then to the SW multicast channel to download and run the correct/updated STB SW. After this it may be possible for the users to select new channels or the EPG (Electronic Programming Guide) by having the STB tuning/requesting the new channel (e.g., IGMP Join request) probably by releasing (e.g., IGMP leave request) other channels first.
  • EPG Electronic Programming Guide
  • VCC Virtual Channel's Control Channel
  • a special type of channel that unlike "normal" channels does not transport video/audio contents but instead only the channel reference to be viewed/listened at any given moment for that virtual channel.
  • This channel is also broadcasted but has a much limited bandwidth when compared with "normal" channel, as only a channel id is broadcasted.
  • Such channel is produced normally but not restrict in real-time or near real-time by an external company being it a dedicated company, interest group, or individual.
  • this channel may have to be tuned (e.g., IGMP join) and may have to be subscribed, i.e., it may only be available under paid subscription.
  • This channel may be sent continuously but also periodically although care may have to be taken in order to have short enough periods to avoid an even later/longer channel change (e.g., movie already started for a while) which may already take a non-neglectable time depending on the channel switching time speed (e.g., IGMP join possibly after IGMP leave from previous multicast channel may not be neglected). Even if a channel change would be reported instantaneously by the external entity in the control channel a problem may still exist since that a viewer/listener upon selection of a Virtual Channel Control Channel may have to wait for a while until the channel to be set is known (due to its periodic transmission) and therefore tuned by the STB.
  • IGMP join possibly after IGMP leave from previous multicast channel may not be neglected
  • a VCCC may not have to be limited to the emission of a single virtual channel (VC) but many VCs may be sent at once. This is especially true for those STBs which can decode different video/audio channels simultaneously to be seen at different TV sets connected to it. It is also true for advanced TV sets or even STBs which would allow viewing different channels at once at TV screen.
  • VC virtual channel
  • Video/audio channels possibly more than one received simultaneously
  • Announcements channel controlling channel normally periodically sent
  • SW version sent on start up request
  • EGP channel Electronic Programming Guide - sent on request
  • control channel only sends the reference(s) (i.e., an Id like number) to the channel(s) that should be viewed/listened at a given moment.
  • the channel number(s) to be viewed/listen at a given moment is broadcasted at the virtual channel' control channel in a real time or near real time mode, to follow the "normal" channels programs. That choice can be done either by individuals, companies or group of interest: A specific company or group of interest, like (but not limited too): A company dedicated to children subjects like growth, education and protection, with lots of specialist (e.g., teachers, psychologists, parents' associations ...) on that area that should find the balance between the available channels.
  • channel switching information may be provided indirectly by monitoring the specific person channel switching at any moment and broadcasting that channel id/reference in a virtual channel, or to be more precise, in the associated VCCC.
  • each virtual channel's control channel may be specific to certain subjects or most likely be a generalist channel combining many specific subjects according to the zapping channel producers overall channel orientation purpose (like but not limited too): News or its sub-division (economics, sports, war conflicts, or sudden specific news (e.g., certain place tsunami news) ...); Spots and its subdivisions (football, basketball, ...), Music and its subdivisions (e.g., classic, pop/rock, ...), Science, travel, child entertainment, Adult entertainment or its subdivisions (e.g., types of TV series, movies, etc.), Child channel (combining/mixing animated cartoons with educational programs), Fashion, Cooking, etc.
  • this virtual channel (service) will also be seen at the EGP list and viewers/listeners might be charged too from viewing/listening it.
  • the virtual channels' control channels are almost like the "normal" channels with the big exception that require much lower bandwidth since not the channel contends but their references are broadcasted. So, on a normal operation the viewer/listener would handle the virtual channel (its control channel to be exact) as a normal channel, i.e., it may be selected/zapped like any other, but because they are virtual channels, possibly a small icon indication is provided in addition to a button in the STB remote control to hold/resume current virtual channel choice. It should be noted that the STB remote control is not restricted to one button, nor to the addition of a new button. The STB remote control may also comprise a set of buttons or a combination of buttons which have to be pressed in a special sequence for providing the above described service. It will be the STBs that under request of such control channels would see them as special channels and handle them appropriately.
  • Another possible example not forming part of this invention may be for RBS (Radio Broadcast Systems) and not only for IPTV systems.
  • RBS Radio Broadcast Systems
  • radio control channels i.e., channels stripped of their audio contents but not of the RDS (Radio Data System) part which allows digital information transmission very useful to inform the radio system receptor of the channel that should be tuned at any given moment apart from other properties of the channel, like its type, name and so on.
  • RDS Radio Data System
  • the radio control channels may use also very little bandwidth meaning that much higher choices could be possible.
  • the control channel referenced channel is not available (e.g., very low signal) the system could instead switch to a preconfigured one (e.g., remain in current channel, switch to next channel with similar program, etc.)
  • radio stations channels are not subscribed/paid by the listener (in IPTV systems they could be), a possible alternative revenue income for the radio control channels producers could be temporary and periodically switching to radio channels under commercial break or even to a permanent all-time advertisement channel that is used by the different radio control channel producers. This way those producers could assure some income for their control channels from the advertisement channel.
  • a support of virtual channels may be provided, which result from a timely change of "normal" available/subscribed broadcasted channels, following a certain generalist or more specific subject and whose program/channel choice is produced by an external entity normally but not restricted to in real or near real time.
  • An exemplary embodiment of the invention may provide the following advantages: Provision of a creation of a virtual channel from the concatenation of programs from existing channels, by automatically switching between programs of the different channels over the time. This feature may be attractive to viewer/listeners since it may provide the possibility to automatically switch channels according to the choices of an entrusted external source, that follows they interests/preferences and that they have explicitly allowed/requested.
  • Viewer/listener gain is obtained not only from having the virtual channel that could be produced by specialists (e.g., the child education and development channel, Financial Markets review channel, ...) but also in cases where the subscriber cannot constantly switch the channels or where the switching by a third person (external entity) does not lead to missing consensus when various viewers/listeners at the same receptor (e.g., TV/audio radio set).
  • IPTV virtual channels i.e., to their control channels
  • control channels may not be free but a paid service, meaning that both IPTV providers and the virtual channels' control channels producers (being those individuals, companies or groups of interest) may have revenue coming from them.
  • the method of the invention may lead viewer to subscribe to additional channels which is also attractive to the IPTV providers and TV/Audio producers.
  • the viewer/listener may opt to subscribe to a channel that is often referenced by the virtual channel.
  • this technique may provide a much bigger virtual channel selection possibility to the viewer/listeners, coming from different external sources, instead of relying on the previous learned or configured preferences and publicized individual normal channel information to base the switching which comes as a suggestion to switch that requires also much interaction from the viewer/listener.
  • This technique may also avoid the existing of virtual channels which really carry video/audio contents from normal channels, not only because it means much less bandwidth requirements (hence much more virtual channels possible and less network bandwidth requirements needed) but because such approach brings less legal issues as only external entities' choices are broadcasted and not the video/audio contents of the normal channels.
  • Fig. 2 shows a schematic representation of a communication system according to an exemplary embodiment of the present invention which is adapted for implementing a method according to the invention.
  • the communication system comprises a receiving station 105 and a transmitting station 101, which are linked by a communication path 201, which may be bidirectional.
  • Fig. 3 shows a flow-chart of an exemplary embodiment of a method according to the present invention.
  • a virtual channel control channel is generated by an external entity.
  • the virtual channel control channel comprises information about normal channels, such as channel IDs or channel references.
  • the virtual channel control channel information is transmitted from the transmitting unit to a receiving unit, for example via triple-play provider network or even via Internet.
  • the virtual channel control channel information is received by the receiving station, for example after switching on a set top box at the receiving station and after switching the receiving station to an electronic program guide showing different categories and after selecting the virtual channel control channel.
  • step 4 the virtual channel control channel is identified by the receiving station and for example tagged in order to show the user, that this channel is a virtual channel or virtual channel control channel.
  • step 5 the receiving station switches automatically to the normal channel corresponding to the virtual channel control channel information. If the user wants, he/she can press a hold button in order to keep this selected channel which is now proposed. After that, the user may press a "resume button" to continue the channel selection triggered by the external entity.
  • the external entity may be in the position to catch the start/end of a program and to avoid commercials, even if programs are shifted in time due to program changes.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Claims (10)

  1. Verfahren zum Bereitstellen eines virtuellen Kanals für eine Empfangsstation (105), wobei das Verfahren die folgenden Schritte umfasst:
    Empfangen von Daten von einem Steuerkanal für virtuelle Kanäle in der Empfangsstation (105); und
    automatisches Umschalten zu einem normalen Kanal auf der Grundlage der Daten vom Steuerkanal für virtuelle Kanäle; wobei
    die Daten einen Kanalbezug enthalten, der dem normalen Kanal entspricht;
    die Daten über den Steuerkanal für virtuelle Kanäle von einer Sendestation (101) zur Empfangsstation (105) gesendet werden,
    die Empfangsstation (105) eine Mehrfach-Multicast-Kanalabstimmung unterstützt,
    die Empfangsstation (105) zum parallelen Abstimmen sowohl auf den Steuerkanal für virtuelle Kanäle als auch den bezeichneten normalen Kanal ausgelegt ist,
    die Abstimmung des Steuerkanals für virtuelle Kanäle dieselbe wie die Abstimmung des normalen Kanals ist, und zwar ein Internetgruppenmanagementprotokollverbinden, IGMP-Verbinden, zum Abstimmen auf den Steuerkanal für virtuelle Kanäle und ein IGMP-Verbinden zum Abstimmen auf den normalen Kanal, und
    die Empfangsstation (105) zum Erkennen des Steuerkanals für virtuelle Kanäle als einen speziellen Kanal ausgelegt ist, der sich von einem normalen Kanal, der Audio-/Video-Inhalte transportiert, dadurch unterscheidet, dass der Steuerkanal für virtuelle Kanäle lediglich den Kanalbezug auf den normalen Kanal transportiert, damit der normale Kanal zu jedem beliebigen Zeitpunkt für den virtuellen Kanal angesehen und/oder angehört werden kann.
  2. Verfahren nach Anspruch 1, wobei
    die Empfangsstation (105) eine Fernsehvorrichtung zum Visualisieren von Fernsehprogrammen, eine Set-Top-Box und/oder eine Funkvorrichtung zum Abspielen einer digitalen Rundfunkübertragung umfasst.
  3. Verfahren nach einem der Ansprüche 1 oder 2, wobei
    die Daten, die im Steuerkanal für virtuelle Kanäle gesendet werden, durch eine externe Einheit erzeugt werden, die aus der Gruppe gewählt ist, die ein fest zugeordnetes Unternehmen, eine Interessengruppe und eine Person enthält.
  4. Verfahren nach Anspruch 3, wobei
    eine Programm-/Kanalwahl des virtuellen Kanals durch die externe Einheit in Echtzeit oder nahezu Echtzeit erstellt wird und
    der Steuerkanal für virtuelle Kanäle durch die externe Einheit in Echtzeit oder nahezu Echtzeit erstellt wird.
  5. Verfahren nach einem der vorhergehenden Ansprüche, wobei
    der Steuerkanal für virtuelle Kanäle kontinuierlich gesendet wird, derart, dass das automatische Umschalten zum normalen Kanal in Echtzeit, nahezu Echtzeit oder Nicht-Echtzeit durchgeführt werden kann.
  6. Verfahren nach einem der vorhergehenden Ansprüche, wobei
    der Steuerkanal für virtuelle Kanäle mehrere individuelle Kanalbezüge umfasst, die jeweils einem entsprechenden normalen Kanal entsprechen.
  7. Verfahren nach einem der vorhergehenden Ansprüche, wobei
    die Empfangsstation (105) eine Auswahl des Steuerkanals für virtuelle Kanäle durch einen Anwender ermöglicht.
  8. Verfahren nach einem der vorhergehenden Ansprüche, wobei
    mehr als ein virtueller Kanal durch die Steuereinheit für virtuelle Kanäle bezeichnet wird.
  9. Empfangsstation (105) zum Bereitstellen eines virtuellen Kanals, wobei die Empfangsstation (105) Folgendes umfasst:
    ein Mittel zum Empfangen von Daten von einem Steuerkanal für virtuelle Kanäle; und
    ein Mittel zum automatischen Umschalten zu einem normalen Kanal auf der Grundlage der Daten vom Steuerkanal für virtuelle Kanäle; wobei
    die Daten einen Kanalbezug enthalten, der dem normalen Kanal entspricht;
    die Daten über den Steuerkanal für virtuelle Kanäle von einer Sendestation (101) zur Empfangsstation (105) gesendet werden und
    die Empfangsstation (105) ferner Folgendes umfasst:
    ein Mittel zum Abstimmen auf eine Multicast-Gruppe des Steuerkanals für virtuelle Kanäle und
    ein Mittel zum Unterstützen einer Mehrfach-Multicast-Kanalabstimmung; wobei
    die Empfangsstation (105) zum parallelen Abstimmen sowohl auf den Steuerkanal für virtuelle Kanäle als auch den bezeichneten normalen Kanal ausgelegt ist,
    die Abstimmung des Steuerkanals für virtuelle Kanäle dieselbe wie die Abstimmung des normalen Kanals ist, und zwar ein Internetgruppenmanagementprotokollverbinden, IGMP-Verbinden, zum Abstimmen auf den Steuerkanal für virtuelle Kanäle und ein IGMP-Verbinden zum Abstimmen auf den normalen Kanal, und
    die Empfangsstation (105) ferner ein Mittel zum Identifizieren des Steuerkanals für virtuelle Kanäle als einen speziellen Kanal umfasst, der sich von einem normalen Kanal, der Audio-/Video-Inhalte transportiert, dadurch unterscheidet, dass der Steuerkanal für virtuelle Kanäle lediglich den Kanalbezug auf den normalen Kanal transportiert, damit der normale Kanal zu jedem beliebigen Zeitpunkt für den virtuellen Kanal angesehen und/oder angehört werden kann.
  10. Kommunikationssystem zum Bereitstellen eines virtuellen Kanals, wobei das Kommunikationssystem eine Sendestation (101) und eine Empfangsstation (105) nach Anspruch 9 umfasst, wobei
    die Sendestation (101) ein Mittel zum Senden der Daten zur Empfangsstation (105) über den Steuerkanal für virtuelle Kanäle umfasst.
EP07017325.7A 2007-09-04 2007-09-04 Automatische TV/Audio-Kanalumschaltung beim Empfang von Informationen über bestimmte Steuerungskanäle Active EP2034639B1 (de)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070121629A1 (en) * 2005-11-30 2007-05-31 Microsoft Corporation Accelerated channel change

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5359601A (en) * 1992-10-30 1994-10-25 Scientific-Atlanta, Inc. Apparatus providing dynamic virtual service selection in a multi-service communications system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070121629A1 (en) * 2005-11-30 2007-05-31 Microsoft Corporation Accelerated channel change

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