CN100433805C - Digital TV receiver and signal transmitting method thereof - Google Patents
Digital TV receiver and signal transmitting method thereof Download PDFInfo
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- CN100433805C CN100433805C CNB2005100272191A CN200510027219A CN100433805C CN 100433805 C CN100433805 C CN 100433805C CN B2005100272191 A CNB2005100272191 A CN B2005100272191A CN 200510027219 A CN200510027219 A CN 200510027219A CN 100433805 C CN100433805 C CN 100433805C
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000004891 communication Methods 0.000 claims description 12
- 238000012546 transfer Methods 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000013519 translation Methods 0.000 claims description 4
- 230000000875 corresponding effect Effects 0.000 description 8
- 238000000926 separation method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
- H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access for conditional access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
A digital TV receiver consists of channel module, card module and host as they are separated to each other. Its signal transmitting method includes analyzing out transmission data stream after transmission stream is channel-decoded by channel module, sending transmission stream to host by interface and carrying out descramble by card module then carrying out information source decoding by host.
Description
Technical field
The present invention relates to a kind of digital television receiver and signal transfer method thereof, relate in particular to digital television receiver and signal transfer method thereof 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 by this invention provides a kind of machine road and separates digital television receiver and signal transfer method thereof, 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 solution adopted in the present invention 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.
Further, a kind of signal transfer method of digital television receiver is provided: transmitting data stream is earlier after the road module is carried out channel-decoding, parse transport stream, and transport stream is sent to main frame by interface, carry out descrambling through card module again, after main frame carries out source coding, described road module, card module, main frame are separated from each other.
The present invention 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 invention 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 invention.
Embodiment
Digital television receiver of the present invention 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 invention 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 invention can carry, and also can not be with display device (as display screen).
Further, the present invention also provides the signal transfer method based on above-mentioned digital television receiver: transmitting data stream is earlier after the road module is carried out channel-decoding, parse transport stream, and transport stream is sent to main frame by interface, carry out descrambling through card module again, after main frame carries out source coding, described road module, card module, main frame are separated from each other.
Specifically, 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 (10)
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 comprises bridge module, and described card module is connected with main frame by the bridge module in the main frame with the road module, and described bridge module is used to discern module or card module, and corresponding bus protocol is provided adaptively, makes main frame and road module or card module communication; Described card module receives the TS of the scrambling stream of bridge module transmission, and the TS bag to transport stream carries out descrambling selectively; Described main frame, road module, card module are separated from each other.
2, digital television receiver according to claim 1 is characterized in that, described main frame also 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;
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 1 is characterized in that, described 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.
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, 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.
7, a kind of signal transfer method of digital television receiver is characterized in that, transmitting data stream after the road module is carried out channel-decoding, carries out descrambling through card module earlier again, and after main frame carries out source coding, described road module, card module, main frame are separated from each other.
8, the signal transfer method of digital television receiver according to claim 7 is characterized in that, comprises 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.
9, the signal transfer method of digital television receiver according to claim 8, it is characterized in that, when main frame connects a plurality of module, for card module, the transport stream interface connects for the daisy chain form, for the road module, can only there be a way module received television signal the same time, and unselected road module is by bypass.
10, the signal transfer method of digital television receiver according to claim 8, it is characterized in that, described transmit flow data buffer has 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.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100272191A CN100433805C (en) | 2005-06-29 | 2005-06-29 | Digital TV receiver and signal transmitting method thereof |
| PCT/CN2005/002228 WO2007000084A1 (en) | 2005-06-29 | 2005-12-16 | Digital television receiver and signal transmission method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100272191A CN100433805C (en) | 2005-06-29 | 2005-06-29 | Digital TV receiver and signal transmitting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1889639A CN1889639A (en) | 2007-01-03 |
| CN100433805C true CN100433805C (en) | 2008-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100272191A Expired - Fee Related CN100433805C (en) | 2005-06-29 | 2005-06-29 | Digital TV receiver and signal transmitting method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100433805C (en) |
| WO (1) | WO2007000084A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101296331B (en) * | 2007-04-24 | 2011-11-09 | 深圳Tcl新技术有限公司 | Broadcasting device |
| TWI492769B (en) * | 2009-09-23 | 2015-07-21 | Alcon Res Ltd | Injectable aqueous ophthalmic composition and method of use therefor |
| CN109743573A (en) * | 2018-12-29 | 2019-05-10 | 深圳Tcl新技术有限公司 | Media playing method, device, intelligent terminal and computer readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326124A (en) * | 2000-05-06 | 2001-12-12 | 三星电子株式会社 | Function extendable multi-media device and extending method |
| CN1336736A (en) * | 2000-07-28 | 2002-02-20 | 索尼公司 | Digital broadcast receiving arrangement, and method for receiving digital broadcast using same |
| CN1455590A (en) * | 2003-06-23 | 2003-11-12 | 于劲飞 | Method for realizing separation of digital television/digital television set top box card |
| CN2807648Y (en) * | 2005-06-29 | 2006-08-16 | 上海广电（集团）有限公司中央研究院 | Digital television receiver |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04351088A (en) * | 1991-05-28 | 1992-12-04 | Mitsubishi Electric Corp | Subscription broadcast receiver |
| GB2261580B (en) * | 1991-11-09 | 1996-02-28 | David Arends | Improvements in or relating to the decoding of signals |
-
2005
- 2005-06-29 CN CNB2005100272191A patent/CN100433805C/en not_active Expired - Fee Related
- 2005-12-16 WO PCT/CN2005/002228 patent/WO2007000084A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326124A (en) * | 2000-05-06 | 2001-12-12 | 三星电子株式会社 | Function extendable multi-media device and extending method |
| CN1336736A (en) * | 2000-07-28 | 2002-02-20 | 索尼公司 | Digital broadcast receiving arrangement, and method for receiving digital broadcast using same |
| CN1455590A (en) * | 2003-06-23 | 2003-11-12 | 于劲飞 | Method for realizing separation of digital television/digital television set top box card |
| CN2807648Y (en) * | 2005-06-29 | 2006-08-16 | 上海广电（集团）有限公司中央研究院 | Digital television receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1889639A (en) | 2007-01-03 |
| WO2007000084A1 (en) | 2007-01-04 |
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