CN201467322U - Multi-channel digital television signal receiving device - Google Patents
Multi-channel digital television signal receiving device Download PDFInfo
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- CN201467322U CN201467322U CN2009201085694U CN200920108569U CN201467322U CN 201467322 U CN201467322 U CN 201467322U CN 2009201085694 U CN2009201085694 U CN 2009201085694U CN 200920108569 U CN200920108569 U CN 200920108569U CN 201467322 U CN201467322 U CN 201467322U
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Abstract
The utility model relates to the field of digital television. In order to solve the problem that a computer can not be used for simultaneously receiving multi-channel digital television signals in the prior art, the utility model provides a multi-channel digital television signal receiving device which comprises multiple digital television signal channels, a multiplexing unit and an interface unit, wherein the multiple digital television signal channels are used for receiving multi-channel digital television signals; the multiplexing unit is used for multiplexing the multi-channel digital television signals into one channel of digital television signals; and the interface unit is used for sending the digital television signals which are multiplexed into one channel to the computer for video decoding and playing. The utility model has the beneficial effect that people can watch one channel of digital television programs on the computer and simultaneously transcribe or watch another channel of digital television programs.
Description
Technical field
The utility model relates to digital TV field, particularly a kind of multi-path digital TV signal receiver.
Background technology
Along with popularizing of Digital Television, the number of users fast development, existing TV set-top box increases year by year, but family is not to be the center fully with the TV at present, increasing people on PC, shows that according to 2009 " residents in Beijing time utilization condition survey reports " town dweller sees 1 hour 53 minutes TV time per capita to the time flower, 32 minutes last the Internet time, the trend that increases is gradually arranged.
Watching video on computers is a kind of user's request trend, as video website and download film, but shortcoming is that speed of download is slow or program quality is unintelligible, and peripheral component interconnection of the prior art (PCI) digital television case has realized watching on computers Digital Television, record another road program in the time that but program can not being watched simultaneously, and do not comprise USB (USB) interface, can not connect no pci interface equipment such as notebook.
The utility model content
The purpose of this utility model is to provide a kind of multi-path digital TV signal receiver, is used for solving prior art and can not realizes the problem that multi-path digital is televised or recorded on computers.
In order to solve above-mentioned the problems of the prior art, the utility model embodiment provides a kind of multi-path digital TV signal receiver, and this device comprises: multi-path digital TV signal passage is used to receive the multi-path digital TV signal; Multi-connection unit is used for described multi-path digital TV signal is multiplexed to a way word TV signal; Interface unit is used for described one tunnel the digital television signal of being multiplexed to is sent to computer, carries out video decode and plays.
According to a further aspect of the described device of the utility model embodiment, the key generation unit according to the digital television signal that described multi-path digital TV signal passage receives, generates described multi-path digital TV signal passage and deciphers employed key.
According to another further aspect of the described device of the utility model embodiment, described each way word TV signal passage comprises:
The Digital Television interface is used for the transport stream of receiving digital television signal;
Front-end processing unit is used to filter received described transport stream;
The descrambling unit, the key that is used to utilize described key generation unit to produce carries out descrambling to described transport stream.
According to another further aspect of the described device of the utility model embodiment, described Multi-connection unit comprises:
Read module reads described multi-path digital TV signal in proper order according to the state information of the descrambling unit in each way word TV signal passage;
The Shi Zhongxiang read module provides clock information, guarantee speed that described read module gets transport stream less than arbitrary road transport stream time of advent at interval;
The synchronization character modified module is done replacement to the synchronization character in the transport stream header that reads, to distinguish described transport stream.
According to another further aspect of the described device of the utility model embodiment, described interface unit comprises:
USB interface and/or pci interface.
The beneficial effect of the utility model embodiment is, the utility model embodiment gets up the transport stream multiple connection of multi-path digital TV signal passage by Multi-connection unit, constitute a way word TV signal, realize watching on computers the colleague of a way word TV programme to record another way word TV programme, perhaps watched another way word TV programme.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, does not constitute qualification of the present utility model.In the accompanying drawings:
Figure 1 shows that a kind of multi-path digital TV signal receiver structural representation of the utility model embodiment;
Figure 2 shows that another structural representation of a kind of multi-path digital TV signal receiver of the utility model embodiment;
Figure 3 shows that a kind of another structural representation of multi-path digital TV signal receiver of the utility model embodiment;
Figure 4 shows that the structural representation of the utility model embodiment Multi-connection unit;
Shown in Figure 5, read the sequential chart of TS for the utility model Multi-connection unit.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer,, the utility model is described in further details below in conjunction with execution mode and accompanying drawing.At this, exemplary embodiment of the present utility model and explanation thereof are used to explain the utility model, but not as to qualification of the present utility model.
The utility model embodiment provides a kind of multi-path digital TV signal receiver.Below in conjunction with accompanying drawing the utility model is elaborated.
Be illustrated in figure 1 as a kind of multi-path digital TV signal receiver structural representation of the utility model embodiment.Comprise multi-path digital TV signal path 10 1, Multi-connection unit 102, interface unit 103.
Described multi-path digital TV signal path 10 1 is connected with described Multi-connection unit 102, and described interface unit 103 is connected with described Multi-connection unit 102.
Described multi-path digital TV signal path 10 1 is used to receive the multi-path digital TV signal.
Described Multi-connection unit 102 is used for described multi-path digital TV signal is multiplexed to a way word TV signal.
Described interface unit 103 is used for described one tunnel the digital television signal of being multiplexed to is sent to computer, carries out video decode and plays.
As an embodiment of the present utility model, be illustrated in figure 2 as another structural representation of a kind of multi-path digital TV signal receiver of the utility model embodiment, this figure is similar substantially to embodiment shown in Figure 1, only difference is described at this, and something in common repeats no more.In the embodiment of Fig. 2, also comprise key generation unit 204, be connected,, generate Digital Television and decipher employed key according to the digital television signal that described multi-path digital TV signal passage 201 receives with described multi-path digital TV signal passage 201.
Be illustrated in figure 3 as a kind of another structural representation of multi-path digital TV signal receiver of the utility model embodiment.
Comprise first via digital television signal passage 300, the second way word TV signal passages 400, Third Road digital television signal passage 500, Multi-connection unit 600, USB (USB) interface 700, pci interface 800, key generation unit 900.
Wherein first via digital television signal passage 300, the second way word TV signal passage 400 are connected with Multi-connection unit 600 respectively with Third Road digital television signal passage 500, described USB interface 700 is connected with described Multi-connection unit 600 with pci interface 800, and described key generation unit 900 is connected with described three way word TV signal passages.
Described first via digital television signal passage 300 also comprises: Digital Television interface 301, front-end processing unit 302, descrambling unit 303.
The described second way word TV signal passage 400 also comprises: Digital Television interface 401, front-end processing unit 402, descrambling unit 403.
Described Third Road digital television signal passage 500 also comprises: Digital Television interface 501, front-end processing unit 502, descrambling unit 503.
Three tunnel Digital Television interface wherein, front-end processing unit, the descrambling unit is all identical, below only its function is described.
The Digital Television interface is used for the transport stream (TS) of receiving digital television.
Front-end processing unit is used to filter received TS, and 32 groups of pid values (every suit digital television program all has a PID in TS) for example can be set, and picks out meeting in the filter table packet of given pid value among the TS, incongruently then filters out.
The descrambling unit, the key that is used to utilize key generation unit 900 to produce carries out descrambling to TS, for example, and 32 groups of descrambled control words (CW) of utilizing key generation unit 900 to generate, judge the corresponding CW that uses of each PID, wherein CW is exactly the key that key generation unit 900 generates.
Described Multi-connection unit 600 is used for the digital television signal that described three way word TV signal passages receive is multiplexed to a way word TV signal, as shown in Figure 4, structural representation for the utility model embodiment Multi-connection unit, comprise read module 601, clock 602, synchronization character modified module 603.
Read module 601 learns that according to the state information of descrambling unit which road has the TS bag to arrive, and order reads this several roads then.For example, when Dang Sanlu had TS bag to arrive, sequential loop read the TS of TS-＞first via of TS-＞Third Road of TS-＞the second tunnel of the first via ...
Described clock 602 provides clock information to read module 601, and the speed that makes described read module 601 get the TS bag can guarantee that three the tunnel read the cycle of TS bag in proper order less than the arbitrary road TS bag interval time of advent.
Distinguish the data of different TS in order to calculate function, described synchronization character modified module 603 can be done replacement to the synchronization character in the packet header behind the descrambling, for example the 2 the tunnel changes 0x41 into, and the 3 the tunnel changes 0x42 into.
Wherein the workflow of Multi-connection unit 600 is as follows, and 3 road TS at first are to be buffered in the output buffers of descrambling unit behind descrambling.Adopted the buffer structure of table tennis formula in the present embodiment, can guarantee that a TS bag (188 byte length) of at first exporting is placed in the buffer memory, the wait Multi-connection unit is fetched data.At waiting time,, just be stored in second half buffering area if there is the TS result behind the new descrambling to export.So being exactly a TS, descrambling unit maximum latency contracts out existing minimum interval.
Under worst case, may occur having simultaneously 3 road TS bag to arrive the situation of Multi-connection unit, guarantee not obliterated data, TS bag institute's time spent that Multi-connection unit is taken away in one tunnel must be less than 1/3 of the minimum interval of TS bag.The temporal summation of 3 tunnel data that arrive all being taken away when Multi-connection unit can guarantee the stand-by period less than maximum like this, as shown in Figure 5, reads the sequential chart of TS for the utility model Multi-connection unit.
The arrival rate of each the road TS bag in the utility model embodiment is less than 10MByte/s, and the speed of Multi-connection unit reading of data is 30MByte/s, said condition above having satisfied by such design.
Described USB (USB) interface 700 is respectively applied for computer with pci interface 800 and is connected, send the digital television signal (MPG2 form or other video format) of described Multi-connection unit 600 multiple connections to computer, digital television signal is carried out video decode by computer.
The utility model the foregoing description, utilize computer that Digital Television is carried out the hardware requirement that video decode has reduced digital television receiving apparatus, reduced cost, and pass through three way word TV signal channel multiplexings, realized that computer can receive a plurality of TV programme simultaneously, a common way word TV signal passage has the programme content of 8 frequencies, three way word TV signal passages just have the programme content of 24 frequencies, can be by user's selection, record another way word TV programme the colleague who watches a way word TV programme, perhaps watch another way word TV programme.
Above-mentioned the utility model embodiment sequence number is not represented the quality of embodiment just to description.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Above-described embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is an embodiment of the present utility model; and be not used in and limit protection range of the present utility model; all within spirit of the present utility model and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (5)
1. a multi-path digital TV signal receiver is characterized in that, this device comprises:
Multi-path digital TV signal passage is used to receive the multi-path digital TV signal;
Multi-connection unit is used for described multi-path digital TV signal is multiplexed to a way word TV signal;
Interface unit is used for described one tunnel the digital television signal of being multiplexed to is sent to computer, carries out video decode and plays.
2. device according to claim 1 is characterized in that comprising: the key generation unit according to the digital television signal that described multi-path digital TV signal passage receives, generates described multi-path digital TV signal passage and deciphers employed key.
3. device according to claim 2 is characterized in that, described each way word TV signal passage comprises:
The Digital Television interface is used for the transport stream of receiving digital television signal;
Front-end processing unit is used to filter received described transport stream;
The descrambling unit, the key that is used to utilize described key generation unit to produce carries out descrambling to described transport stream.
4. device according to claim 3 is characterized in that comprising: described Multi-connection unit comprises:
Read module reads described multi-path digital TV signal in proper order according to the state information of the descrambling unit in each way word TV signal passage;
The Shi Zhongxiang read module provides clock information, guarantee speed that described read module gets transport stream less than arbitrary road transport stream time of advent at interval;
The synchronization character modified module is done replacement to the synchronization character in the transport stream header that reads, to distinguish described transport stream.
5. device according to claim 1 is characterized in that, described interface unit comprises:
USB interface and/or pci interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201085694U CN201467322U (en) | 2009-06-10 | 2009-06-10 | Multi-channel digital television signal receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201085694U CN201467322U (en) | 2009-06-10 | 2009-06-10 | Multi-channel digital television signal receiving device |
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| Publication Number | Publication Date |
|---|---|
| CN201467322U true CN201467322U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201085694U Expired - Fee Related CN201467322U (en) | 2009-06-10 | 2009-06-10 | Multi-channel digital television signal receiving device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287136A (en) * | 2016-09-28 | 2017-01-04 | 广州凯耀资产管理有限公司 | A kind of Novel digital television signal receiving device |
| CN108737889A (en) * | 2018-05-16 | 2018-11-02 | 青岛海信电器股份有限公司 | A kind of TS method for stream processing and digital multimedia reception device |
-
2009
- 2009-06-10 CN CN2009201085694U patent/CN201467322U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287136A (en) * | 2016-09-28 | 2017-01-04 | 广州凯耀资产管理有限公司 | A kind of Novel digital television signal receiving device |
| CN108737889A (en) * | 2018-05-16 | 2018-11-02 | 青岛海信电器股份有限公司 | A kind of TS method for stream processing and digital multimedia reception device |
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| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20170610 |