CN2807648Y - Digital television receiver - Google Patents
Digital television receiver Download PDFInfo
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- CN2807648Y CN2807648Y CNU2005200429598U CN200520042959U CN2807648Y CN 2807648 Y CN2807648 Y CN 2807648Y CN U2005200429598 U CNU2005200429598 U CN U2005200429598U CN 200520042959 U CN200520042959 U CN 200520042959U CN 2807648 Y CN2807648 Y CN 2807648Y
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Abstract
The utility model provides a digital television receiver, which comprises a host machine, a card module and a track module, wherein the track module is used for receiving some television signals of digital television standard and analyzing a transport stream, and the track module can send the transport stream to the host machine. The host machine, the track module and the card module are mutually separated, and the track module and the host machine are respectively provided with corresponding interfaces and are separately connected via the interfaces. The utility model can effectively reduce cost and promote scaled production, and the utility model is profitable for development multistrata new products so as to form product lines with abundant digital television products. Users can flexibly select according to requirements and have convenient use, and the users need not purchase a plurality of set top boxes, need not change the set top box because of different carriers and need not operate a plurality of remote controllers.
Description
Technical field
The utility model relates to a kind of digital television receiver, relates in particular to the digital television receiver that a kind of machine road separates.
Background technology
At present in China radio and TV operator's several big Digital Television popularization pattern, try employed set-top box out and all be (promptly the CA system integration in set-top box) scheme of machine engaging one, when promoting Digital Television, bundle operation by operator.Such popularization pattern has brought many difficulties for set-top box manufacturing enterprise, be unfavorable for reducing the cost of set-top box, be unfavorable for extensive, mass production, be unfavorable for having influenced the propelling of Digital Television industrialization process by the development transition of set-top box to digital TV integrated machine.
In view of the integral machine top box is the root that causes the market segmentation and municipal monopoly, the scheme of " separation between machine and card " is arisen at the historic moment, independent the common segment in the set-top box (hardware), make " machine ", and various places radio and TV operator's condition receiving unit is made " card ", this " machine " just can be general by each institute of operator, and the not high card of value content is stayed local operator and condition receives in merchant's hand.
Shown in Figure 1 is a kind of existing " separation between machine and card " modular structure of digital television receiver: comprise main frame, card module, wherein main frame comprises: be used to receive microprocessor, the demultiplexing module of the tuner of RF input, the demodulation module that is connected with tuner, reception remote controller signal, the decoder module that is connected with demultiplexing module, described decoder module output video and audio frequency.Described card comprises: with the descrambler of the TS of the scrambling stream of the two-way card microprocessor that is connected of host microprocessors, receiving demodulation module transmission, the described descrambler TS of descrambling spreads and gives demultiplexing module.Described card can also be provided with (also can not being provided with) IC-card, and this IC-card is mainly used in security information such as depositing key and mandate, and it can be embedded in card module inside, also can reside in additional separable module, in smart card.
When main frame connected a plurality of module, the transport stream interface should adopt the daisy chain form to connect, as shown in Figure 2.Main frame is responsible for the maintenance command interface and is connected, and the session between card module and the main frame can be handled independently.Removing a card module should not exert an influence to command interface transport layer and being connected of other modules.When main frame connected a plurality of module simultaneously, main frame can be selected the module of being correlated with according to selected type of service.
But, domestic all " separation between machine and card " schemes are all only considered a kind of Digital Television acceptance criteria at present, for example wired reception, the standard of China's terrestrial wireless is in case determine, this wire receiver top box just can not receive terrestrial wireless TV signal, because in set-top box, channel receives decoding and source coding is an one.Equally, also be unfavorable for the development of digital TV integrated machine, because in digital television, can not be built in the mode of all digital television standards and all Channel Transmission in the television set.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of machine road and separates digital television receiver, this receiver separates channel-decoding with source coding, can receive the Digital Television with descrambling multiple standards (as satellite, wired, ground and communication network etc.) more neatly.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopted is:
A kind of digital television receiver is provided, comprises: main frame, card module, and the road module: the TV signal that it is used to receive certain digital television standard parses transport stream, and transport stream is sent to main frame; Described main frame, road module, card module are separated from each other, and described road module and main frame are respectively equipped with corresponding interface and removably connect by interface.
The utility model can effectively reduce cost, and promotes large-scale production; Help developing multi-level new product, form the abundant product line of digital TV products; The user can select according to demand flexibly, and the user is easy to use, needn't buy a plurality of set-top box, needn't change set-top box because of different operators, needn't handle a plurality of remote controllers.
Description of drawings
Fig. 1 is a kind of existing " separation between machine and card " the modular structure schematic diagram of digital television receiver.
Fig. 2 is existing digital television receiver intermodule transport stream chain of interfaces schematic diagram.
Fig. 3 is the modular structure schematic diagram that machine of the present utility model road separates digital television receiver.
Fig. 4 is the structural representation of bridge module shown in Figure 3.
Fig. 5 is an intermodule transport stream chain of interfaces schematic diagram of the present utility model.
Embodiment
Machine of the present utility model separates digital television receiver and comprises: main frame, card module, and the road module: the TV signal that it is used to receive certain digital television standard parses transport stream, and transport stream is sent to main frame; Described main frame, road module, card module are separated from each other, and described road module and main frame are respectively equipped with corresponding interface and removably connect by interface.
As shown in Figure 3: described main frame comprises:
Host microprocessors, it is used to receive the remote signal that remote controller sends, and the communication with road module and card module is responsible in the collaborative work of each circuit module in the main control system.
Bridge module, it is used to discern module or card module, corresponding bus protocol (as CardBus, 16bit pc card, USB, Common Interface) and road module or card module communication are provided adaptively, when multimode joint connection, select suitable transmission stream paths adaptively.
The mpeg decode module, it is used to compress the decoding of information source and video, audio frequency output;
Demultiplexing module, it is used to resolve selected video/audio code stream or data flow, and transmission signals is given described mpeg decode module.
This main frame also can comprise (also can not comprising):
Tuner, it receives the RF input signal, is used for channel selection and frequency translation;
Channel decoding module, it receives the intermediate-freuqncy signal of tuner output and the decoded transmission stream signal of channel is passed to bridge module.
If but main frame is when being built-in with above-mentioned tuner and channel decoding module (that is, the road module), then external road module must belong to different standards with built-in road, as built-in wired road, and the road of then external ground or satellite; The road of built-in satellite, the road on then external wired or ground.
Described road module is used to receive the TV signal of certain digital television standard, parses transport stream, and by with the corresponding interface of main frame (as CardBus, 16bit pc card, USB) transport stream being sent to main frame.This road module comprises:
Tuner, it receives the RF input signal, is used for channel selection and frequency translation;
Channel decoding module, it receives the intermediate-freuqncy signal of tuner output, and the intermediate-freuqncy signal that will select is carried out demodulation, last output transport stream (TS code stream);
Interface adapter, the bridge module that it receives the decoded transmission stream signal of channel decoder module and this signal is sent to main frame, the host interface that interface adapter described in this specific embodiment provides can be CardBus bus interface or 16 pc card interfaces of 32 bit data width, also can be USB interface.
Described card module is used to receive the TS stream of scrambling, the needed data that are used for descrambling respective program or service of extraction conditions access modules, and the TS bag to transport stream carries out descrambling selectively, and the TS of descrambling spreads and gives main frame.The interface of card module and main frame can be common interface (CI) or USB, and this card module comprises:
Card microprocessor, it is connected with described host microprocessors is two-way, is used for communication and control in the card module and scheduling with host microprocessors.
Descrambler, it receives the TS of scrambling stream of bridge module transmission, and the TS bag to transport stream carries out descrambling selectively, and the TS of descrambling spreads and gives demultiplexing module.
As shown in Figure 4: bridge module of the present utility model comprises:
Transmit flow data buffer, this buffer are used for the transmit flow data of temporary road module input.
First host adapter, what be used to discern insertion is module or card module, provides and corresponding interface protocol of insert module and module communication, and suitable transmission stream paths is provided under the control of host microprocessors adaptively.
Second host adapter, what be used to discern insertion is module or card module, provides and corresponding interface protocol of insert module and module communication, and suitable transmission stream paths is provided under the control of host microprocessors adaptively.
Host adapter in this bridge module can be bus control unit or usb hub, and what this host adapter can be discerned insertion automatically is module or card module, and corresponding interface protocol is provided.This bridge module is under the control of host microprocessors, carry out communication with each module respectively, the transmit flow data that reads in scrambling from the road module of selecting is temporarily stored in the transmit flow data buffer, from buffer, read the transmit flow data of scrambling again, and be sent in the card module of selection and carry out descrambling, the transmit flow data of descrambling is sent to demultiplexing module in the main frame then.
Module and card module should be able to be discerned and support to described two host adapters all, and each host adapter should be able to be supported a plurality of modules of the same type, but dissimilar modules should be distinguished corresponding different host adapters.
Should comprise the TS transmit flow data buffer of 8K at least in the bridge module of main frame, this buffer is followed the principle of first-in first-out, it should have two cycle count pointers of representing the head and the tail memory cell respectively, a host adapter can only be arranged to its operation that reads or writes at synchronization.As option, bridge module can provide the outer input interface of TS transport stream, so that contain in host computer system under the situation of RF receiver module, accepts the TS flow data that channel decoder transmits.
The digital television receiver of " separation of machine road " of the present utility model can carry, and also can not be with display device (as display screen).
The signal transduction process of digital television receiver of the present utility model is: comprise the steps:
At first, the road module receives the transmit flow data of scrambling and data is read in the buffer in the bridge module of main frame;
The card module that the transmit flow data of reading scrambling from buffer is sent to selection carries out descrambling;
Transmit flow data behind the descrambling is sent to the demultiplexing module of main frame, and demultiplexing module parses the mpeg decode module that selected audio-video code stream or data flow are sent to main frame;
The mpeg decode module is carried out source coding, obtains unpressed audio/video flow or data flow, exports or delivers to display device then and show.
When main frame connected a plurality of module, CI transport stream interface should adopt the daisy chain form to connect, and at one time, main frame selects one road RF receiver module (the RF receiver module that road module or main frame carry) to carry out work uniquely, as shown in Figure 5.Main frame is responsible for safeguarding the connection of each module, and the session between module and the main frame can be handled independently.Removing a module should not exert an influence to command interface transport layer and being connected of other modules.When main frame connected a plurality of module simultaneously, main frame can be according to the module that selected type of service is selected or bypass is relevant.Specifically: when a plurality of module, for card module, the transport stream interface should adopt the daisy chain form to connect, for the road module, because can only there be a way module received television signal the same time, unselected road module should be by bypass, in order to avoid transmission stream paths opens circuit.As in Fig. 5, establish and select road module 1 received television signal, the transport stream that road module 1 receives adopts the daisy chain form to pass through each card module respectively, but bypass non-selected road module 2.
Claims (7)
1, a kind of digital television receiver comprises: main frame, card module, it is characterized in that, and also comprise: the road module, the TV signal that it is used to receive certain digital television standard parses transport stream, and transport stream is sent to main frame; Described main frame, road module, card module are separated from each other, and described road module and main frame are respectively equipped with corresponding interface and removably connect by interface.
2, digital television receiver according to claim 1 is characterized in that, described main frame comprises:
Host microprocessors, it is used to receive the remote signal that remote controller sends, and the communication with road module and card module is responsible in the collaborative work of each circuit module in the main control system;
Bridge module, it is used to discern module or card module, and corresponding bus protocol and road module or card module communication are provided adaptively;
The mpeg decode module, it is used to compress the decoding of information source and video, audio frequency output;
Demultiplexing module, it is used to resolve selected video/audio code stream or data flow, and transmission signals is given described mpeg decode module.
3, digital television receiver according to claim 2 is characterized in that, described main frame also can comprise:
Tuner, it receives the RF input signal, is used for channel selection and frequency translation;
Channel decoding module, it receives the intermediate-freuqncy signal of tuner output and the decoded transmission stream signal of channel is passed to bridge module.
4, digital television receiver according to claim 1 is characterized in that, described road module comprises:
Tuner, it receives the RF input signal, is used for channel selection and frequency translation;
Channel decoding module, it receives the intermediate-freuqncy signal of tuner output, and the intermediate-freuqncy signal that will select is carried out demodulation, last output transport stream;
Interface adapter, the bridge module that it receives the decoded transmission stream signal of channel decoder module and this signal is sent to main frame.
5, digital television receiver according to claim 4 is characterized in that, described interface adapter can be CardBus bus interface or 16 pc card interfaces of 32 bit data width, also can be USB interface.
6, digital television receiver according to claim 2 is characterized in that, described bridge module comprises:
Transmit flow data buffer, this buffer are used for the transmit flow data of temporary road module input;
First host adapter, second host adapter, what be used to discern insertion is module or card module, provides and corresponding interface protocol of insert module and module communication, and suitable transmission stream paths is provided under the control of host microprocessors adaptively;
7, digital television receiver according to claim 6 is characterized in that, described first host adapter, second host adapter can be bus control unit or usb hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200429598U CN2807648Y (en) | 2005-06-29 | 2005-06-29 | Digital television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200429598U CN2807648Y (en) | 2005-06-29 | 2005-06-29 | Digital television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2807648Y true CN2807648Y (en) | 2006-08-16 |
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ID=36921942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200429598U Expired - Fee Related CN2807648Y (en) | 2005-06-29 | 2005-06-29 | Digital television receiver |
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| Country | Link |
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| CN (1) | CN2807648Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100433805C (en) * | 2005-06-29 | 2008-11-12 | 上海广电（集团）有限公司中央研究院 | Digital TV receiver and signal transmitting method thereof |
| CN101296331B (en) * | 2007-04-24 | 2011-11-09 | 深圳Tcl新技术有限公司 | Broadcasting device |
| CN102970591A (en) * | 2012-11-28 | 2013-03-13 | 深圳市茁壮网络股份有限公司 | Digital video broadcast signal receiving device |
| CN108271059A (en) * | 2015-06-10 | 2018-07-10 | 青岛海信电器股份有限公司 | A kind of method of display TV signal |
-
2005
- 2005-06-29 CN CNU2005200429598U patent/CN2807648Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100433805C (en) * | 2005-06-29 | 2008-11-12 | 上海广电（集团）有限公司中央研究院 | Digital TV receiver and signal transmitting method thereof |
| CN101296331B (en) * | 2007-04-24 | 2011-11-09 | 深圳Tcl新技术有限公司 | Broadcasting device |
| CN102970591A (en) * | 2012-11-28 | 2013-03-13 | 深圳市茁壮网络股份有限公司 | Digital video broadcast signal receiving device |
| CN108271059A (en) * | 2015-06-10 | 2018-07-10 | 青岛海信电器股份有限公司 | A kind of method of display TV signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060816 Termination date: 20110629 |