CN103200435A - Set top box and control method and television signal transmission system used for same - Google Patents
Set top box and control method and television signal transmission system used for same Download PDFInfo
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- CN103200435A CN103200435A CN2012100035603A CN201210003560A CN103200435A CN 103200435 A CN103200435 A CN 103200435A CN 2012100035603 A CN2012100035603 A CN 2012100035603A CN 201210003560 A CN201210003560 A CN 201210003560A CN 103200435 A CN103200435 A CN 103200435A
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Abstract
The invention discloses a set top box, and a control method and a television signal transmission system used for the same. The set top box comprises a tuning device, a control signal receiving device and a controller, wherein the tuning device is used for receiving two paths of cable television signals and respectively converting the two paths of cable television signals into a first transmission flow and a second transmission flow; the control signal receiving device is used for receiving first control signals and second control signals, and the first control signals and the second control signals respectively come from different input devices; and the controller is connected with the tuning device and the control signal receiving device, and is used for descrambling the first transmission flow and the second transmission flow, then decoding the first transmission flow after descrambling to first video and audio signals according to the first control signals and outputting the first video and audio signals, and decoding the second transmission flow after descrambling to second video and audio signals according to the second control signals and outputting the second video and audio signals. According to the set top box, and the control method and the television signal transmission system used for the set top box, the fact that one set top box can be used in two televisions to watch different digital television programs at the same time is achieved.
Description
Technical field
The present invention relates to the digital cable TV field, particularly, relate to a kind of set-top box, be used for control method and the television signal transmission system of set-top box.
Background technology
Along with progressively going deep into of Digital Television translation, see that by set-top box Digital Television has more and more obtained customer acceptance.Existing set-top box great majority can only realize that a television set watches digital television program, if the user wants to realize that two television sets are independently watched digital television program in the family like this, then need two set-top box, by the information interaction between IC-card, make second set-top box under the control of first set-top box, carry out work.Though this technology can realize two television sets and independently watch digital television program that owing to need two set-top box, cost is higher, is unfavorable for promoting.
In addition, also having a kind of is to come corresponding two television sets with a set-top box, and the output signal of set-top box is transferred to the input of two television sets simultaneously, reaches the purpose that two television sets are watched digital television program simultaneously.But adopt this technology, two television sets can only be watched same program simultaneously, when a television set being changed the platform operation, the program of another television set also changes thereupon, therefore, this technology can not realize that two television sets independently watch digital television program and be independent of each other, and using value is not high.
Summary of the invention
The purpose of this invention is to provide a kind of set-top box, be used for control method and the television signal transmission system of set-top box, need in the prior art to use two set-top box to realize the problem of two television set independence TV receptions to solve.
To achieve these goals, the invention provides a kind of set-top box, this set-top box can comprise: tuner is used for receiving the two-way cable TV signal, and converts described two-way cable TV signal to first transport stream and second transport stream respectively; The control signal receiving system be used for to receive respectively first control signal and second control signal from different input units; And controller, link to each other with described tuner and described control signal receiving system, be used for described first transport stream and second transport stream are carried out descrambling, afterwards according to described first control signal, first transmission stream decoding behind the described descrambling is become first video/audio signal, and export this first video/audio signal; According to described second control signal, second transmission stream decoding behind the described descrambling is become second video/audio signal, and export this second video/audio signal.
The present invention also provides a kind of control method for set-top box, and this method can comprise: receive the two-way cable TV signal, and convert described two-way cable TV signal to first transport stream and second transport stream respectively; Receive respectively first control signal and second control signal from different input units; And described first transport stream and second transport stream carried out descrambling, afterwards according to described first control signal, first transmission stream decoding behind the described descrambling is become video/audio signal, and export this video/audio signal; According to described second control signal, second transmission stream decoding behind the described descrambling is become video/audio signal, and export this video/audio signal.
The present invention also provides a kind of television signal transmission system, and this system can comprise: above-mentioned set-top box; First and second input unit is respectively applied to import described first control signal and second control signal; The control signal retransmission unit is used for receiving described second control signal from described second input unit, and this second control signal is forwarded to described control signal receiving system; And first and second television set, be respectively applied to receive described first and second video/audio signal.
By technique scheme, set-top box can be handled the two-way TV signal according to two path control signal, and output two-way video/audio signal, thereby makes two television sets TV reception and being independent of each other simultaneously.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 a and Fig. 1 b are the structure charts according to the set-top box of embodiment of the present invention;
Fig. 2 is the control method flow chart that is used for set-top box according to embodiment of the present invention; And
Fig. 3 is the structure chart according to the television signal transmission system of embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
The invention provides a kind of set-top box 10, as shown in Figure 1a, this set-top box 10 can comprise: tuner 101 is used for receiving the two-way cable TV signal, and converts described two-way cable TV signal to first transport stream and second transport stream respectively; Control signal receiving system 104 be used for to receive respectively first control signal and second control signal from different input units; And controller 105, link to each other with described tuner 101 and described control signal receiving system 104, being used for that described first transport stream and second transport stream are carried out descrambling (can use an IC-card scrambling item of two different transport stream to be carried out the descrambling of CA system at this, two transport stream behind the descrambling can be used for direct decoding), afterwards according to described first control signal, first transmission stream decoding behind the described descrambling is become first video/audio signal, and export this first video/audio signal; According to described second control signal, second transmission stream decoding behind the described descrambling is become second video/audio signal, and export this second video/audio signal.
Wherein, the control signal that first control signal and second control signal mainly refer to TV programme signal is operated (as, search frequency, change platform, regulate volume, menu operation etc.).Controller 105 respectively according to this first control signal and second control signal after to descrambling first transport stream and second transport stream behind the descrambling decode.
Particularly, tuner 101 can comprise the first tuner 101a and the second tuner 101b, and shown in Fig. 1 b, wherein, the first tuner 101a is used for receiving first via TV signal, and converts this first via TV signal to first transport stream; The second tuner 101b is used for receiving the second tunnel TV signal, and converts this second tunnel TV signal to second transport stream.
In addition, according to the controller 105 in the set-top box 10 of embodiment of the present invention, have two transport stream access ports, namely can receive first transport stream and second transport stream, but the invention is not restricted to this.Has only a transport stream access port (namely at controller 105, can only receive one tunnel transport stream) situation, set-top box 10 provided by the invention also can comprise multiplexer 107, shown in Fig. 1 b, this multiplexer 107 is connected between described tuner 101 and the described controller 105, be used for described first transport stream and second transport stream are carried out multiplexing, and the transport stream after multiplexing be sent to described controller 105; And the described transport stream after multiplexing of 105 pairs of this controllers carries out demultiplexing, and two transport stream behind the demultiplexing are carried out descrambling.Wherein, multiplexer 107 can adopt CPLD (CPLD), field programmable gate array modes such as (FPGA) to realize, also can adopt special-purpose application-specific integrated circuit (ASIC) (ASIC) chip to realize, the OVT009 chip of extensively looking as east, but be not limited to this.After transport stream after multiplexing carried out demultiplexing, the scrambling item of two different transport stream after can using same IC-card to demultiplexing carried out the descrambling of CA system, and two transport stream behind the descrambling can be used for direct decoding.
In addition, for making set-top box of the present invention applicable to dissimilar television sets (being specially Digital Television and simulated television), preferably, described set-top box 10 also can comprise conversion equipment 109, shown in Fig. 1 b, this conversion equipment 109 links to each other with described controller 105, is used for described first video/audio signal and/or second video/audio signal be converted to meeting the various video/audio signals of set-top box exporting country target.By this, can be at simulated television, output simulation video/audio signal (for example, analog video signal can be CVBS, S terminal, forms such as YPbPr, VGA, but is not limited thereto), at Digital Television, output digital video-audio signal (for example, digital video signal can be forms such as HDMI, YCbCr, but is not limited thereto), to be applicable to dissimilar television sets.Wherein, conversion equipment 109 can be general coding chip, also can adopt special-purpose application-specific integrated circuit (ASIC) (ASIC) chip to realize, OVT009 chip for example, but be not limited to this.
Especially, if want first video/audio signal of controller 105 output and/or second video/audio signal stable more and have a more performance (as low noise etc.), set-top box 10 provided by the invention also can comprise looks audio drive unit 110, shown in Fig. 1 b, this is looked audio drive unit 110 and links to each other with described controller 105, is used for described first video/audio signal and/or second video/audio signal are carried out filtering and/or amplification.
The present invention also provides a kind of control method for set-top box, and as shown in Figure 2, this method can comprise: receive the two-way cable TV signal, and convert described two-way cable TV signal to first transport stream and second transport stream respectively; Receive respectively first control signal and second control signal from different input units; And described first transport stream and second transport stream carried out descrambling, afterwards according to described first control signal, first transmission stream decoding behind the described descrambling is become video/audio signal, and export this video/audio signal; According to described second control signal, second transmission stream decoding behind the described descrambling is become video/audio signal, and export this video/audio signal.
Especially, after converting described two-way cable TV signal to first transport stream and second transport stream respectively, this method also can comprise: described first transport stream and second transport stream are carried out multiplexing, the transport stream after multiplexing to this is afterwards carried out demultiplexing.
The present invention also provides a kind of television signal transmission system, and as shown in Figure 3, this system can comprise: above-mentioned set-top box 10; First input unit 20 and second input unit 30 are respectively applied to import described first control signal and second control signal; Control signal retransmission unit 40 is used for receiving described second control signal from described second input unit 30, and this second control signal is forwarded to described control signal receiving system 104; And first television set 50 and second television set 60, be respectively applied to receive described first video/audio signal and second video/audio signal.
Particularly, first input unit 20 and/or second input unit 30 can be remote controller and/or button (as be positioned on the set-top box 10 and/or control signal retransmission unit 40 on accent platform button).
Control signal retransmission unit 40 can adopt ethernet line or wireless network that second control signal is sent to control signal receiving system 104.Wherein, if adopt ethernet line to send, then second control signal can be sent to control signal receiving system 104 by ethernet line; If adopt wireless network to send, then second control signal can be passed to by the mode of wireless transmission in the air, adopts corresponding radio receiver that this second control signal is received at control signal receiving system 104 places.
In addition, television signal transmission system provided by the invention also can comprise video/audio signal retransmission unit 70, this video/audio signal retransmission unit 70 is used for receiving described second video/audio signal from described controller 105, and this second video/audio signal is forwarded to described second television set 60.
Wherein, described video/audio signal retransmission unit 70 can receive described second video/audio signal from described controller 105 via Ethernet or wireless network.Particularly, if employing ethernet line, then controller is directly coupled to the ethernet line the inside with second video/audio signal, video/audio signal retransmission unit 70 takes out this second video/audio signal and receives second television set 60 from ethernet line, thereby this second television set 60 can be play this second video/audio signal; At this moment, video/audio signal retransmission unit 70 can be terminal box.If employing wireless network, then controller is launched by antenna after second video/audio signal is modulated to a frequency, video/audio signal retransmission unit 70 is given second television set 60 after this second video/audio signal is received again, thereby this second television set 60 can be play this second video/audio signal; At this moment, video/audio signal retransmission unit 70 can be radio-frequency (RF) Receiving Device.
Especially, controller is sent to second television set 60 with second video/audio signal, except employing video/audio signal retransmission unit 70 is transmitted, also can adopt the family expenses cable TV network, controller is modulated to second video/audio signal behind the frequency in the feed-in family expenses cable TV network, and second television set 60 is received in the cable TV network and set corresponding channel and just can watch second video/audio signal.
Pass through such scheme, described first input unit 20 (for example, remote controller), set-top box 10 and first television set 50 can be positioned at a room, set-top box 10 can link to each other with the distributor at cable TV network place, to receive the two-way cable TV signal of telling through distributor.The user can handle first input unit 20 in this room, this first input unit 20 sends the corresponding first control signal receiving system 104 that controls signal in the set-top box 10, set-top box 10 can export first video/audio signal of first television set 50 according to this first control signal control to, realizes controlling first television set 50 by this; Described second input unit 30 (for example, remote controller), control signal retransmission unit 40, video/audio signal retransmission unit 70 and second television set 60 can be positioned at another room, the user can handle second input unit 30 in this room, this second input unit 30 sends corresponding second and controls signal to control signal retransmission unit 40, this control signal retransmission unit 40 can be forwarded to control signal receiving system 104 in the set-top box 10 with this second control signal through ethernet line or wireless network, set-top box 10 can be according to the control of this second control signal via netting twine too, wireless network or family expenses cable TV network export second video/audio signal of second television set 60 to, realize controlling second television set 60 by this.Thus, the present invention can realize the function of two television set independence TV receptions by a set-top box.
Below describe preferred implementation of the present invention by reference to the accompanying drawings in detail; but; the present invention is not limited to the detail in the above-mentioned execution mode; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove in addition, each concrete technical characterictic described in above-mentioned embodiment under reconcilable situation, can make up by any suitable manner, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various execution mode of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. set-top box, this set-top box comprises:
Tuner is used for receiving the two-way cable TV signal, and converts described two-way cable TV signal to first transport stream and second transport stream respectively;
The control signal receiving system be used for to receive respectively first control signal and second control signal from different input units; And
Controller, link to each other with described tuner and described control signal receiving system, be used for described first transport stream and second transport stream are carried out descrambling, afterwards according to described first control signal, first transmission stream decoding behind the described descrambling is become first video/audio signal, and export this first video/audio signal; According to described second control signal, second transmission stream decoding behind the described descrambling is become second video/audio signal, and export this second video/audio signal.
2. set-top box according to claim 1, wherein, described tuner comprises first tuner and second tuner.
3. set-top box according to claim 1 and 2, wherein,
Described set-top box also comprises multiplexer, and this multiplexer is connected between described tuner and the described controller, is used for described first transport stream and second transport stream are carried out multiplexing, and the transport stream after multiplexing is sent to described controller; And
Described controller also carries out demultiplexing to described transport stream after multiplexing.
4. set-top box according to claim 3, wherein, described set-top box also comprises conversion equipment, and this conversion equipment links to each other with described controller, is used for described first video/audio signal and/or second video/audio signal be converted to meeting the various video/audio signals of set-top box exporting country target.
5. set-top box according to claim 1, wherein, described set-top box also comprises looks audio drive unit, and this is looked audio drive unit and links to each other with described controller, is used for described first video/audio signal and/or second video/audio signal are carried out filtering and/or amplification.
6. control method that is used for set-top box, this method comprises:
Receive the two-way cable TV signal, and convert described two-way cable TV signal to first transport stream and second transport stream respectively;
Receive respectively first control signal and second control signal from different input units; And
Described first transport stream and second transport stream are carried out descrambling, afterwards according to described first control signal, first transmission stream decoding behind the described descrambling is become video/audio signal, and export this video/audio signal; According to described second control signal, second transmission stream decoding behind the described descrambling is become video/audio signal, and export this video/audio signal.
7. method according to claim 6, wherein, after converting described two-way cable TV signal to first transport stream and second transport stream respectively, this method also comprises:
Described first transport stream and second transport stream are carried out multiplexing, the transport stream after multiplexing to this is afterwards carried out demultiplexing.
8. television signal transmission system, this system comprises:
According to the described set-top box of each claim among the claim 1-5;
First and second input unit is respectively applied to import described first control signal and second control signal;
The control signal retransmission unit is used for receiving described second control signal from described second input unit, and this second control signal is forwarded to described control signal receiving system; And
First and second television set is respectively applied to receive described first and second video/audio signal.
9. system according to claim 8, wherein this system comprises:
The video/audio signal retransmission unit is used for receiving described second video/audio signal via ethernet line or wireless network from described controller, and this second video/audio signal is forwarded to described second television set.
10. system according to claim 8, wherein said second television set receives described second video/audio signal via the family expenses cable TV network from described controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100035603A CN103200435A (en) | 2012-01-06 | 2012-01-06 | Set top box and control method and television signal transmission system used for same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100035603A CN103200435A (en) | 2012-01-06 | 2012-01-06 | Set top box and control method and television signal transmission system used for same |
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| CN103200435A true CN103200435A (en) | 2013-07-10 |
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| CN2012100035603A Pending CN103200435A (en) | 2012-01-06 | 2012-01-06 | Set top box and control method and television signal transmission system used for same |
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| US20030128302A1 (en) * | 2002-01-04 | 2003-07-10 | Potrebic Peter J. | Method and apparatus for selecting among multiple tuners |
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Application publication date: 20130710 |