CN201127071Y - PVR digital television receiver - Google Patents
PVR digital television receiver Download PDFInfo
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- CN201127071Y CN201127071Y CNU2007201713514U CN200720171351U CN201127071Y CN 201127071 Y CN201127071 Y CN 201127071Y CN U2007201713514 U CNU2007201713514 U CN U2007201713514U CN 200720171351 U CN200720171351 U CN 200720171351U CN 201127071 Y CN201127071 Y CN 201127071Y
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- input interface
- output interface
- video tuner
- cable modem
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Abstract
The utility model discloses a PVR digital television receiver, comprising a cable modem having a radio frequency input interface for inputting radio frequency signal, an uplink channel input interface and a downlink channel input interface, a video tuner group for implementing PVR function of the digital television receiver and implementing bidirectional communication cooperating with the cable modem, with the radio frequency input interface thereof connected with the downlink channel output interface of the cable modem, and the downlink signal input interface thereof connected with the downlink channel input interface of the cable modem. The utility model provides solution scheme for simultaneously implementing PVR function and bidirectional communication by the television receiver, makes it possible for the television receiver to bidirectionally transmit with a plurality of external networks, effectively realizes interaction between service providers and customers.
Description
Technical field
The utility model relates to the digital television receiver field, especially relates to a kind of PVR digital television receiver.
Background technology
Have now and have personal video record (Personal Video Recorder, PVR) television receiver of function is digital television techniques and the combination of hard disc recording technological perfectionism, not only make set-top box increase the function of video recording, especially by time-shifting techniques, intelligent video recording technology, record technology etc. provides a kind of brand-new mode of watching TV to spectators while seeing.Existing television receiver with PVR function be with hard disk as storage medium, set up local magnanimity buffering area and huge program storage storehouse, and utilize digital processing technology to realize control and management program.
And, development along with technology, in conjunction with the digital television techniques and the network communications technology, proposed to be used for two-way communication, had in-built electrical cable modem (the Cable Modem that is used to carry out data communication at cable TV network, CM) television receiver, realized cable TV network is connected with Internet, not only make computer pass through the television reception function and be connected, can also make the user can experience the enjoyment of viewing and admiring TV programme in real time that service brought such as video request program with Internet.
Chinese patent application number is 2004100774386, and the applying date is on December 9th, 2004, and the application name is called the patent application of " set-top-box for bidirectional ", has proposed a kind of set-top-box for bidirectional that is formed by the one-way set-top box transformation.Though this set-top box can be carried out two-way program transmission with multiple external network, effectively realizes the interaction between service provider and the user.But still there is following defective in this technical scheme:
1, because the mode that return path signal adopts the RS232 serial ports to carry out data communication has the upstream bandwidth bottleneck, can only be used for the less information passback of data volume, can't satisfy the demand that inserts required bulk information passback behind the Internet;
2, can't support to have the headend equipment of Digital Television PVR function.
The utility model content
Technical problem to be solved in the utility model is, a kind of PVR digital television receiver is proposed, can carry out two-way program transmission with multiple external network so that have the television receiver of PVR function, effectively realize the interaction between service provider and the user, and make the user can experience the PVR function of television receiver simultaneously.
For solving technical problem of the present utility model, the utility model discloses a kind of PVR digital television receiver, comprising: duplexer has the rf input interface, data feedback channel input interface and the down going channel output interface that are used for the input radio frequency signal;
Cable modem has data feedback channel output interface and down going channel input interface, and its data feedback channel output interface is connected with the data feedback channel input interface of duplexer;
Be used for cooperating the video tuner group that realizes two-way communication with described cable modem, its rf input interface connects the down going channel output interface of described duplexer, and its downstream signal output interface is connected with the down going channel input interface of described cable modem.
More excellent, described video tuner group comprises two first video tuner and second video tuners that structure is identical; The rf input interface of described first video tuner connects the down going channel output interface of described cable modem; The rf input interface of described second video tuner is connected with the loop output interface of described first video tuner, and the loop output interface is connected with the down going channel input interface of described cable modem.
More excellent, described video tuner group comprises two first video tuner and second video tuners that structure is different; The rf input interface of described first video tuner connects the down going channel output interface of described cable modem, and its loop output interface is connected with the down going channel input interface of described cable modem; The rf input interface of described second video tuner connects the radio frequency output interface of described first video tuner.
More excellent, described first video tuner comprises first gain amplifier, first distributor, second gain amplifier and second distributor and tuner module; The output interface of described first gain amplifier connects the input interface of described first distributor; One of them output interface of described first distributor is connected with the input interface of described tuner module, and another output interface is connected with the input interface of described second gain amplifier; The output interface of described second gain amplifier connects the input interface of described second distributor, and one of them output interface of described second distributor connects the down going channel input interface of described cable modem, and another output interface connects the rf input interface of described second video amplifier.
More excellent, described video tuner group comprises amplifies distribution module, two first video tuner and second video tuners that structure is identical; The input interface of described amplification distribution module is connected with the down going channel output interface of described cable modem; First output interface connects the rf input interface of described first video tuner, second output interface connects the down going channel input interface of described cable modem, and the loop output interface of described first video tuner connects the rf input interface of described second video tuner; Perhaps, second output interface of described amplification distribution module connects the rf input interface of described second video tuner, and the loop output interface of described first video tuner connects the down going channel input interface of described cable modem.
More excellent, described amplification distribution module comprises gain amplifier and distributor, the input interface of described gain amplifier connects the input interface of described distributor.
More excellent, described amplification distribution module comprises 3 interconnective gain amplifiers of input interface, wherein the output interface of 2 gain amplifiers is connected to the rf input interface of described first video tuner and described second video tuner respectively, and the output interface of 1 gain amplifier connects the down going channel input interface of described cable modem in addition.
More excellent, described amplification distribution module comprises gain amplifier and first, second distributor; The input interface of described first distributor connects the output interface of described gain amplifier, one of them output interface of described first distributor connects the input interface of described second distributor, and one of them output interface of described second distributor connects the down going channel input interface of described cable modem.
More excellent, described first video tuner comprises first gain amplifier, first distributor and tuner module, the output interface of described first gain amplifier connects the input interface of described first distributor, and one of them output interface of described first distributor is connected with the input interface of described tuner module, and another output interface is connected with the rf input interface of described second video tuner.
More excellent, described duplexer is built in cable modem.
Compared with prior art, the utlity model has following beneficial effect:
1, the utility model is realized PVR function and bi-directional communication function simultaneously for television receiver solution is provided, make television receiver carry out two-way program transmission with multiple external network, effectively realize the interaction between service provider and the user, and make the user can experience the PVR function of television receiver simultaneously;
2, duplexer of the present utility model is integrated in the cable modem, and the user can realize the switching of the television receiver of two-way and one-way communication easily simply by selecting to realize the installation cable modem.
Description of drawings
Fig. 1 is the structural representation of first embodiment of the present utility model.
Fig. 2 is the structural representation of first video tuner among Fig. 1.
Fig. 3 is the structural representation of second embodiment of the present utility model.
Fig. 4 is the structural representation that amplifies distribution module among Fig. 3.
Fig. 5 is the structural representation of the 3rd embodiment of the present utility model.
Fig. 6 is the structural representation that amplifies another embodiment of distribution module among Fig. 5.
Fig. 7 amplifies the distribution module structural representation of an embodiment again among Fig. 5.
Fig. 8 is the structural representation of the 4th embodiment of the present utility model.
Fig. 9 is the structural representation of first video tuner among Fig. 8.
Figure 10 is the structural representation of second video tuner among Fig. 8.
Embodiment
The utility model is to television receiver provides the front end scheme that can possess Digital Television PVR function and bi-directional communication function simultaneously, makes and realizes interaction between user and the service provider, also makes the service provider can carry out relevant value-added service; Simultaneously television receiver has the function of video recording, make user experience can the PVR time-shifting techniques, intelligent video recording technology and limit see the brand-new experience of watching TV that technology such as Bian Lu is brought.
Please refer to illustrated in figures 1 and 2ly, be the structural representation of first embodiment of the present utility model, only show the part relevant with the utility model.The utility model provides a kind of two-way communication television receiver of the PVR of having function, comprise duplexer 110, cable modem (Cable Modem, CM) the video tuner group 160 of 120, first video tuner 130 and second video tuner, 140 compositions.
From the radiofrequency signal of cable TV network output,, the upward signal and the downstream signal of cable TV radiofrequency signal are isolated by described duplexer 110 from the rf input interface input of described duplexer 110; Downstream signal imports the rf input interface of described first video tuner 130 into, gain amplifier 131 and distributor 132 by described first video tuner 130, export the rf input interface of described second video tuner 140 to from the loop output interface of described first video tuner 130, gain amplifier and distributor by described second video tuner 140, reach the descending input channel of described cable modem 120 from the loop output interface of described second video tuner 140, and the upward signal of described cable modem 120 imports the data feedback channel of described duplexer 110 into.Wherein, described second video tuner 140 has and the identical structure of described first video tuner 130 shown in Figure 2.
Described first video tuner 130 is arranged in pairs or groups mutually with described cable modem 120 even with described duplexer 110, realizes the bi-directional communication function of digital television receiver.And in described video tuner group 160, increase described second video tuner 140, with 130 collocation of described first video tuner, for digital television receiver is realized personal video recording (Personal VideoRecorder, PVR) function provide may: enter the radiofrequency signal of described video tuner group 160, from being used for the broadcast of digital television program after the radio frequency interface of described first video tuner 130 goes out; Simultaneously, export the radiofrequency signal of described second video tuner 140 to from the loop output interface of described first video tuner 130, can carry out tuning processing by described second video tuner 140 after, extract related data and deposit hard disk in and wait and realize the PVR function.
Certainly, described cable modem 120 also can adopt the Cable Modem that is built-in with described duplexer 110, the convenient switching that realizes two-way and one-way set-top box; In addition, described cable modem 120 is integrated communication tuner is at this enumeration no longer.
This embodiment is a loop output function of having used described first video tuner 130 and described second video tuner 140, realize the connection of down going channel, guaranteed described first video tuner 130, described second video tuner 140 and described cable modem 120 operate as normal simultaneously with this; And standby is when needing described cable modem 120 work, the powerup issue of the gain amplifier of described first video tuner 130 and described second video tuner 140.This embodiment is convenient to realize, do not need to redesign described first video tuner 130 and described second video tuner 140, only need to consider the coupling of described duplexer 110 and described first video tuner 130, and the problems such as inband flatness of the gain amplifier 131 of described first video tuner 130, and the sensitivity index of described second video tuner 140 slightly is worse than described first video tuner 130, mainly is that described second video tuner 140 has increased due to the noise of described first video tuner 130.
Please refer to the structure chart of second embodiment of Fig. 3, only show the part relevant with the utility model.Video tuner group 170 is made up of first video tuner 130, second video tuner 140 and amplification distribution module 150 among this embodiment; Therefore, this embodiment main feature is on the basis of first embodiment, on described cable modem 120, increased the amplification distribution module 150 of signal, and use the loop output function of described first video tuner 130, realize the connection of down going channel, guaranteed described first video tuner 130, described second video tuner 140 and described cable modem 120 operate as normal simultaneously; And when standby needed described cable modem 120 to work, described first video tuner 130 and described second video tuner 140 did not all need power supply.
Wherein, described first video tuner 130 has identical structure with described second video tuner 140, as shown in Figure 2; The structure of described amplification distribution module 150 as shown in Figure 4.
The radiofrequency signal of cable TV network inserts described duplexer 110, and the upward signal and the downstream signal of cable TV radiofrequency signal are isolated; Downstream signal inserts described amplification distribution module 150, and by gain amplifier 151 and distributor 152, described first video tuner 130 of passage 1 access from described distributor 152 output interfaces inserts described cable modem 120 from passage 2; The upward signal of described cable modem 120 inserts the data feedback channel of described duplexer 110.The advantage of this embodiment is the power problems that has solved when standby needs described cable modem 120 to work among first embodiment.
Please refer to shown in Figure 5ly, is the structural representation of the 3rd embodiment of the present utility model, only shows the part relevant with the utility model.Video tuner group 180 is made up of first video tuner 130, second video tuner 140 and amplification distribution module 150 among this embodiment; Therefore, the main feature of this embodiment is passage 2 to be changed into inserting described second video tuner 140 on the basis of second embodiment, and use the loop output function of described first video tuner 130, realization is connected with described cable modem 120 down going channels, has guaranteed described first video tuner 130, described second video tuner 140 and described cable modem 120 operate as normal simultaneously with this; And when standby needed described cable modem 120 to work, described second video tuner 140 did not need power supply.
Wherein, described first video tuner 130 has identical structure with described second video tuner 140, as shown in Figure 2; The structure of described amplification distribution module 150 as shown in Figure 4.
The radiofrequency signal of cable TV network inserts described duplexer 110, the upward signal and the downstream signal of cable TV radiofrequency signal are isolated, downstream signal inserts described amplification distribution module 150, insert described first video tuner 130 by passage 1, passage 2 inserts described second video tuner 140; The loop output of described first video tuner 130 inserts the down going channel of described cable modem 120, and the upward signal of described cable modem 120 inserts the data feedback channel of duplexer.The advantage of this embodiment is the problem that has solved more described first video tuner of 140 sensitivity of second video tuner described in second embodiment 130 differences, makes both sensitivity unanimities.
Wherein, the structure of described amplification distribution module 150 also can adopt 3 interconnective gain amplifiers of input interface to be designed to three tunnel (passage 1, passage 2 and passages 3) output as shown in Figure 6; Perhaps, the structure of described amplification distribution module 150 also can be as shown in Figure 7, adopt 2 distributors and 1 gain amplifier to be designed to three tunnel (passage 1, passage 2 and passages 3) output: the output interface of gain amplifier is connected the input interface of first distributor, and 2 output interfaces of first distributor, one of them output interface is passage 1 output interface, another output interface connects the input interface of second distributor, and 2 output interfaces of this second distributor are respectively passage 2 output interfaces and passage 3 output interfaces.Only passage 3 need be inserted the down going channel of described cable modem 120, then not need to use the loop output function of described first video tuner 130, the connecting line between also can saving.This embodiment better performances, but realize that cost is the highest.
In addition, please refer to shown in Figure 8ly, is the structural representation of the 4th embodiment of the present utility model, only shows the part relevant with the utility model.Wherein, video tuner group 190 is made of first video tuner 210 and second video tuner 220; The structure of described first video tuner 210 is seen shown in Figure 9; The structure of described second video tuner 220 is seen shown in Figure 10.The main feature of this embodiment is to have used the function that described first video tuner 210 has loop output and radio frequency output simultaneously, radio frequency output interface links to each other with the rf input interface of described second video tuner 220, and the loop output interface is connected with described cable modem 120 down going channel interfaces.Guaranteed described first video tuner 210, described second video tuner 220 and described cable modem 120 operate as normal simultaneously with this; When standby needed described first video tuner 210 to work, 210 needs of described first video tuner offered the power supply of two gain amplifiers 211 and 213, and described second video tuner 220 does not need power supply.
The radiofrequency signal of cable TV network inserts described duplexer 110, and the upward signal and the downstream signal of cable TV radiofrequency signal are isolated; Downstream signal inserts the RF input interface of described first video tuner 210, be input to distributor 212 through first gain amplifier 211 and be divided into two paths of signals, one the tunnel is input to the tuner module of described first video tuner 210, and another road is input to second gain amplifier 213; Second distributor 214 is divided into two paths of signals with the signal of second gain amplifier, 213 outputs, and one the road inserts the down going channel of described cable modem 120, and the rf input interface of described second video tuner 220 is inserted on another road; The upward signal of described cable modem 120 inserts the data feedback channel of described duplexer 110.The advantage of this embodiment be described first video tuner 210 integrated second gain amplifier 212 and second distributor 214, have inband flatness preferably, less noise factor, stand-by power consumption is low; And the sensitivity index of described first video tuner 210 and described second video tuner 220 is close.
To sum up, the utlity model has following useful technique effect:
1, the utility model is realized simultaneously PVR function and bi-directional communication function for television receiver solution is provided, make television receiver carry out two-way program transmission with multiple external network, effectively realize the interaction between service provider and the user, and make simultaneously the user can experience the PVR function of television receiver;
2, duplexer of the present utility model is integrated in the cable modem, and the user can simply by selecting to realize the installing cables modem, realize the switching of the television receiver of two-way and one-way communication easily.
Claims (10)
1, a kind of PVR digital television receiver is characterized in that, comprising:
Duplexer has the rf input interface, data feedback channel input interface and the down going channel output interface that are used for the input radio frequency signal;
Cable modem has data feedback channel output interface and down going channel input interface, and its data feedback channel output interface is connected with the data feedback channel input interface of duplexer;
Be used for cooperating the video tuner group that realizes two-way communication with described cable modem, its rf input interface connects the down going channel output interface of described duplexer, and its downstream signal output interface is connected with the down going channel input interface of described cable modem.
2, PVR digital television receiver according to claim 1 is characterized in that, described video tuner group comprises two first video tuner and second video tuners that structure is identical; The rf input interface of described first video tuner connects the down going channel output interface of described cable modem; The rf input interface of described second video tuner is connected with the loop output interface of described first video tuner, and the loop output interface is connected with the down going channel input interface of described cable modem.
3, PVR digital television receiver according to claim 1 is characterized in that, described video tuner group comprises two first video tuner and second video tuners that structure is different; The rf input interface of described first video tuner connects the down going channel output interface of described cable modem, and its loop output interface is connected with the down going channel input interface of described cable modem; The rf input interface of described second video tuner connects the radio frequency output interface of described first video tuner.
4, PVR digital television receiver according to claim 3 is characterized in that, described first video tuner comprises first gain amplifier, first distributor, second gain amplifier and second distributor and tuner module; The output interface of described first gain amplifier connects the input interface of described first distributor; One of them output interface of described first distributor is connected with the input interface of described tuner module, and another output interface is connected with the input interface of described second gain amplifier; The output interface of described second gain amplifier connects the input interface of described second distributor, and one of them output interface of described second distributor connects the down going channel input interface of described cable modem, and another output interface connects the rf input interface of described second video amplifier.
5, PVR digital television receiver according to claim 1 is characterized in that, described video tuner group comprises amplifies distribution module, two first video tuner and second video tuners that structure is identical;
The input interface of described amplification distribution module is connected with the down going channel output interface of described cable modem; First output interface connects the rf input interface of described first video tuner, second output interface connects the down going channel input interface of described cable modem, and the loop output interface of described first video tuner connects the rf input interface of described second video tuner;
Perhaps, second output interface of described amplification distribution module connects the rf input interface of described second video tuner, and the loop output interface of described first video tuner connects the down going channel input interface of described cable modem.
6, PVR digital television receiver according to claim 5 is characterized in that, described amplification distribution module comprises gain amplifier and distributor, and the input interface of described gain amplifier connects the input interface of described distributor.
7, PVR digital television receiver according to claim 5, it is characterized in that, described amplification distribution module comprises 3 interconnective gain amplifiers of input interface, wherein the output interface of 2 gain amplifiers is connected to the rf input interface of described first video tuner and described second video tuner respectively, and the output interface of 1 gain amplifier connects the down going channel input interface of described cable modem in addition.
8, PVR digital television receiver according to claim 5 is characterized in that, described amplification distribution module comprises gain amplifier and first, second distributor; The input interface of described first distributor connects the output interface of described gain amplifier, one of them output interface of described first distributor connects the input interface of described second distributor, and one of them output interface of described second distributor connects the down going channel input interface of described cable modem.
9, according to claim 2 or 5 described PVR digital television receivers, it is characterized in that, described first video tuner comprises first gain amplifier, first distributor and tuner module, the output interface of described first gain amplifier connects the input interface of described first distributor, and one of them output interface of described first distributor is connected with the input interface of described tuner module, and another output interface is connected with the rf input interface of described second video tuner.
10, according to each described PVR digital television receiver in the claim 1 to 8, it is characterized in that described duplexer is built in cable modem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201713514U CN201127071Y (en) | 2007-12-05 | 2007-12-05 | PVR digital television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201713514U CN201127071Y (en) | 2007-12-05 | 2007-12-05 | PVR digital television receiver |
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| Publication Number | Publication Date |
|---|---|
| CN201127071Y true CN201127071Y (en) | 2008-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007201713514U Expired - Fee Related CN201127071Y (en) | 2007-12-05 | 2007-12-05 | PVR digital television receiver |
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| CN (1) | CN201127071Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621638B (en) * | 2009-07-24 | 2011-09-21 | 广州视源电子科技有限公司 | Digital television with two-channel PVR function |
-
2007
- 2007-12-05 CN CNU2007201713514U patent/CN201127071Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621638B (en) * | 2009-07-24 | 2011-09-21 | 广州视源电子科技有限公司 | Digital television with two-channel PVR function |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081001 Termination date: 20151205 |
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| EXPY | Termination of patent right or utility model |