CN202395922U - Portable digital television - Google Patents
Portable digital television Download PDFInfo
- Publication number
- CN202395922U CN202395922U CN2011205704474U CN201120570447U CN202395922U CN 202395922 U CN202395922 U CN 202395922U CN 2011205704474 U CN2011205704474 U CN 2011205704474U CN 201120570447 U CN201120570447 U CN 201120570447U CN 202395922 U CN202395922 U CN 202395922U
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- digital television
- signal
- portable digital
- module
- television machine
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Abstract
The utility model provides a portable digital television. On the one hand, the portable digital television gives reasonable structural design to the box so as to utilize the box space to the maximum limit, on the other hand, modular design is given to the internal hardware, thus simplifying the structure, being convenient for maintenance, and at the same time, significantly reducing the volume of the portable digital television so as to be convenient for carrying the portable digital television.
Description
Technical field
The utility model belongs to the digital television techniques field, relates to a kind of mobile digital television specifically.
Background technology
Mobile digital television is to receive and play TV programme through the mode that wireless digital signal emission, ground digital receive; Need not to connect cable TV network; Can watch TV programme through reception antenna and terminal display, its covers extensively, is swift in response, mobility is strong, no matter under fixing state still is high-speed mobile, all can keep the clear of picture; Realized watching whenever and wherever possible, greatly satisfied in the fast pace society people for the demand of information.
Existing digital television, because its structure and circuit complex connection etc., in use present following problem: 1, present digital television receiver is bulky mostly; No water-proof function; Thereby carry inconvenience, and in transportation or the carrying way, often cause device damage because of strength problem; In addition, material adopts construct blow-molded more, and compression strength is poor, carries and goes out in case of rainy, the equipment damage that is easy to get wet.2, liquid crystal display screen is LCD, and Overall Power Consumption is bigger, and non-rotatable, watches fixed angle, can not satisfy the demand of watching of different user.3, the interface that provides of present digital television receiver is various, does not much all use, instead increased user's use complexity.4, do not receive direct broadcasting satellite program stream that NDS encrypts, reception be mostly the unencrypted satellite programming, the later stage in a single day country breaks the unencrypted program like this, equipment can't be watched.
The utility model content
Bulky for solving existing digital television, carry inconvenient problem, the utility model proposes a kind of portable digital television receiver, and for addressing the above problem, the utility model adopts following technical scheme to realize:
A kind of portable digital television machine; It is characterized in that: comprise casing, display and box frame; Said casing comprises under casing and loam cake, and said display is connected place, said under casing front end upper edge through rotating shaft, and said box frame is installed in the under casing; In the box frame signal handling equipment is installed, is electrically connected through the wire harness that passes rotating shaft between said signal handling equipment and the display.
Aforesaid portable digital television machine; Said signal handling equipment comprises TV host module and coupled STB host module, STB power module, remote control module, interface module and key-press module, and said TV host module is in order to realize image processing, signal reception and decoding, coding output; Said STB host module is in order to receiving satellite word TV signal, and the audio-video signal that converts simulation into is exported to said TV host module.
Aforesaid portable digital television machine; Further comprise the smart card module that links to each other with said STB host module; Said smart card module is in order to realizing the deciphering of the encryption key that the STB host module obtains from the signal flow that receives, and returns treated descrambled control words.
Aforesaid portable digital television machine; Said STB host module comprises tuned cell, demodulating unit and audio frequency and video processing unit; Said tuned cell receiving satellite signal output digital signal; The digital stream that said demodulating unit carries out demodulation output demodulation to said digital signal, said audio frequency and video processing unit carries out chnnel coding, transmission code stream demultiplexing in order to the digital stream to demodulation, decoding output audio, video data.
Aforesaid portable digital television machine; Said audio frequency and video processing unit comprises decoding demultiplexing chip and the audio/video decoding chip that is attached thereto; Said decoding demultiplexing chip is in order to carry out mpeg decode and TS stream demultiplexing, and said audio/video decoding chip is handled and signal decoding in order to realize image, audio.
Aforesaid portable digital television machine, said box top of support is provided with power interface, radiofrequency signal interface, and the place, both sides is provided with loud speaker respectively on the box frame.
Aforesaid portable digital television machine, said display are the led display, and said display can be around said rotating shaft rotation.
Aforesaid portable digital television machine, said box frame rear end has a breach, and after said box frame was installed to said under casing, said breach cooperated the formation headspace with said under casing.
Aforesaid portable digital television machine, said casing is provided with handle outward.
Aforesaid portable digital television machine, said casing adopts the ABS material.
Compared with prior art, advantage of the utility model and good effect are following:
1, the utility model reasonable in design, advantages of small volume has handle; Easy to carry, hardcore is partly placed the casing inner bottom part, display axis is connected in the under casing; Display can carry out the rotation of 0 to 90 degree, satisfies the multi-angle of different user and watches demand; In addition, hardware components adopts the modularized circuit design, and is simple in structure, for ease of maintenaince.
2, externally user interface has only two: power interface and radiofrequency signal interface, significantly reduced the complexity of terminal block, and make the user be difficult for the generation misoperation, produce unnecessary trouble, and can satisfy user's user demand fully.
3, the utility model outer container adopts the ABS material, and high strength and compact structure design, and can bear 100 kilograms resistance to compression, and shell is wear-resistant durable.
Description of drawings
Fig. 1 is the utility model portable digital television machine structural representation;
Fig. 2 is the utility model box shelf structure sketch map;
Among above-mentioned each figure: 1, casing; 11, under casing; 111, handle; 12, loam cake; 2, display; 3, box frame; 31, louvre; 32, power interface; 33, radiofrequency signal interface; 34, loud speaker; 35, control button; 4, rotating shaft;
Fig. 3 is the signal handling equipment theory diagram;
Fig. 4 is a STB host module theory diagram;
Fig. 5 is the deciphering flow chart.
Embodiment
The utility model is given reasonable structural design to casing integral body on the one hand, utilizes cabinet space to greatest extent; The opposing party's face inside hardware carries out modularized design, has greatly dwindled the volume of portable digital television machine, makes to carry conveniently, below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation.
With reference to figure 1 and Fig. 2, the utility model comprises a casing 1, display 2 and box frame 3.
Said casing 1 adopts the ABS material to process, and casing intensity is high, can bear 100 kilograms resistance to compression; Shell is wear-resistant durable, and this casing comprises under casing 11 and loam cake 12, passes through the snap close snapping between under casing 11 and the loam cake 12; Structural design is compact; Overall volume is less, has handle 111 on the under casing, and it is comparatively convenient to carry.
Said display 2 adopts the lower led display of power consumption, and it comprises mainboard, liquid crystal display screen, fore shell, back cover.Liquid crystal display screen is installed on the fore shell, and mainboard is installed on the liquid crystal display screen back side, and the fore shell that liquid crystal display screen and mainboard are installed is fixed in place, under casing 11 front end upper edges through support and rotating shaft 4; Display 2 can carry out the rotation of 0-90 degree around the shaft, and can in above-mentioned angular range, fix the optional position, when the user uses; Open loam cake 12, only need that display screen is rotated to the angle of conveniently watching and get final product, in order to save the space; As shown in Figure 1, can loam cake be placed the display rear.Remote control part and power supply indicator are positioned at the below of LCD, can control direct broadcasting satellite DTV receiving unit and liquid-crystal display section simultaneously.
Said box frame 3 is installed in the under casing 11; Box frame 3 end face zone lines are provided with louvre 31 and form radiating area; The radiating area both sides are respectively equipped with and are used to connect the power interface 32 of importing power supply, the radiofrequency signal interface 33 that connects the direct broadcasting satellite signal, and the place, both sides is provided with loud speaker 34 respectively, and are provided with display part control button 35; Total interface and button all have corresponding literal indication; Easy to use, also be provided with mains switch on the box frame, cut off the power supply of direct broadcasting satellite DTV receiving unit and liquid-crystal display section simultaneously.Box frame 3 rear ends have a breach, and after said box frame 3 was installed to said under casing, said breach cooperated with said under casing and forms headspace, is used to place related accessories such as remote controller, adapter, specification, thereby prevent careless placement of annex and lose.Signal handling equipment (follow-up detailed introduction) is installed in the box frame, is electrically connected through the wire harness that passes rotating shaft between signal handling equipment and the display.
The workflow of the utility model is: the radiofrequency signal interface with direct broadcasting satellite signal connection portable machine, carry out demodulation by signal handling equipment, and demultiplexing, deciphering, output analog audio-video signal is given the liquid crystal display unit after the decoding processing.After liquid crystal display was handled the audio-video signal that receives, output sound was given loud speaker respectively, and output image carries out playing programs to display screen.Specifically with reference to Fig. 4: receive the direct broadcasting satellite signal flow that nds encrypts by electronic tuning unit YS104; Carry out exporting to after the demodulation cpu master chip UPD61214 by demodulation chip GK5109 and carry out TS stream demultiplexing; And mpeg decode, the collaborative smartcard of cpu partly deciphers the output analog audio-video and gives the audio/video decoding chip.The audio/video decoding chip adopts the high integration single-chip MT8223LFMU of Mediatek company to realize functions such as image processing, signal reception and decoding, the output of LVDS coding, audio processing, offers loud speaker and led screen and realizes that the user watches.The remote control part can be carried out the control of direct broadcasting satellite DTV receiving unit and display part through subsidiary at random remote controller.
As shown in Figure 3; Signal handling equipment partly adopts modularized design; Comprise TV host module and coupled STB host module, STB power module, remote control module, interface module and key-press module, said TV host module is in order to realize image processing, signal reception and decoding, coding output; Said STB host module is in order to receiving satellite word TV signal, and the audio-video signal that converts simulation into is exported to said TV host module; Said STB power module is that whole portable machine system provides power supply, and the DC power supply that needs of output system, this power module be input as 12V/3A, output 22V, 5V, 3.3V DC power supply; Said remote control module major function shows that for operation the user can be through operating remote controller remote control panel control corresponding functional modules, and the LED light of remote control panel is represented the state of power supply; Said interface module reaches in order to realize power supply input and radiofrequency signal input; Said key-press module is in order to the TV button part menu of control portable machine.
Said STB host module comprises tuned cell, demodulating unit and audio frequency and video processing unit; Said tuned cell receiving satellite signal output digital signal; Said demodulating unit carries out the digital stream of demodulation output demodulation to said digital signal; Said audio frequency and video processing unit carries out chnnel coding, transmission code stream demultiplexing in order to the digital stream to demodulation, and decoding output audio, video data comprises decoding demultiplexing chip upd61214 and the audio/video decoding chip mtk3223 that is attached thereto; Said decoding demultiplexing chip is in order to carry out mpeg decode and TS stream demultiplexing, and said audio/video decoding chip is handled and signal decoding in order to realize image, audio.
In order to receive the direct broadcasting satellite digital television signal of encrypting through NDS; The utility model also comprises the smart card module that links to each other with said STB host module; Said smart card module is in order to realize the deciphering of the encryption key that the STB host module obtains from the signal flow that receives; And return treated descrambled control words, concrete decrypting process is following with reference to Fig. 4:
When smart card inserted, decoder was at first sought PSI in MPTS, in PSI, find CAT Conditional Access Table CAT; Find the EMM information of corresponding encryption according to the EMM packet identifier that provides in the CAT table, have encryption system number and ECMK2 in the smart card, keys such as EMMK2; Smart card at first uses the EMM deciphering of EMMK2 to encrypting, and confirms according to the EMM information that solves whether this smart card is authorized to watch this program, can not carry out follow-up deciphering if authorize; Also just can not watch this program,, earlier PDK deciphered if this card is authorized to; Solve and launch ECMK2 behind the ECM ECM is deciphered, controlled word CW is at last by the MPTS deciphering of CW to encrypting; Transmitted stream normally, by obtaining required analog audio-video signal behind the decoder decode.
Concrete software flow is following:
Initialization DMUX (demodulation multiplexer) and SMARTCARD (smart card) call the initialization function that the CA kernel provides, its needing of task of this function creation, message, semaphore, internal memory etc.;
Switch to ciphered program, obtain PMT information, send to the CA kernel, obtain CAT information, send to the CA kernel;
The CA kernel is analyzed the ECM data and is judged whether to encrypt, and whether SYSTEM_ID conforms to;
The CA kernel is mutual with card, and smart card should be able to return correct replying;
CA kernel calls DMUX API driver for ECM distributes ecm channel and ecm filter, and is provided with ecm channel PID and filter mask etc.;
CA kernel calls DMUX API driver for EMM distributes emm filer, and is provided with emm channel PID and filter mask etc.;
Obtain the EMM data, send the data to the CA kernel;
Obtain the ECM data, send the data to the CA kernel;
CA kernel processes emm, ecm data send to smart card with the information after peeling off;
Smart card is given the CW word that returns control word descrambling function is set, and unties audio frequency and video ts stream, accomplishes decrypting process.
The above; It only is the preferred embodiment of the utility model; Be not to be the restriction of the utility model being made other form, any professional and technical personnel of being familiar with possibly utilize the technology contents of above-mentioned announcement to change or be modified as the equivalent embodiment of equivalent variations.But every the utility model technical scheme content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection range of the utility model technical scheme according to the technical spirit of the utility model.
Claims (10)
1. portable digital television machine; It is characterized in that: comprise casing, display and box frame; Said casing comprises under casing and loam cake, and said display is connected place, said under casing front end upper edge through rotating shaft, and said box frame is installed in the under casing; In the box frame signal handling equipment is installed, is electrically connected through the wire harness that passes rotating shaft between said signal handling equipment and the display.
2. portable digital television machine according to claim 1; It is characterized in that: said signal handling equipment comprises TV host module and coupled STB host module, STB power module, remote control module, interface module and key-press module, and said TV host module is in order to realize image processing, signal reception and decoding, coding output; Said STB host module is in order to receiving satellite word TV signal, and the audio-video signal that converts simulation into is exported to said TV host module.
3. portable digital television machine according to claim 2; It is characterized in that: also comprise the smart card module that links to each other with said STB host module; Said smart card module is in order to realizing the deciphering of the encryption key that the STB host module obtains from the signal flow that receives, and returns treated descrambled control words.
4. portable digital television machine according to claim 3; It is characterized in that: said STB host module comprises tuned cell, demodulating unit and audio frequency and video processing unit; Said tuned cell receiving satellite signal output digital signal; The digital stream that said demodulating unit carries out demodulation output demodulation to said digital signal, said audio frequency and video processing unit carries out chnnel coding, transmission code stream demultiplexing in order to the digital stream to demodulation, decoding output audio, video data.
5. portable digital television machine according to claim 4; It is characterized in that: said audio frequency and video processing unit comprises decoding demultiplexing chip and the audio/video decoding chip that is attached thereto; Said decoding demultiplexing chip is in order to carry out mpeg decode and TS stream demultiplexing, and said audio/video decoding chip is handled and signal decoding in order to realize image, audio.
6. portable digital television machine according to claim 5 is characterized in that: said box top of support is provided with power interface, radiofrequency signal interface, and the place, both sides is provided with loud speaker respectively on the box frame.
7. portable digital television machine according to claim 6 is characterized in that: said display is the led display, and said display can be around said rotating shaft rotation.
8. portable digital television machine according to claim 7 is characterized in that: said box frame rear end has a breach, and after said box frame was installed to said under casing, said breach cooperated the formation headspace with said under casing.
9. portable digital television machine according to claim 8 is characterized in that: said casing is provided with handle outward.
10. according to each described portable digital television machine of claim 1-9, it is characterized in that: said casing adopts the ABS material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205704474U CN202395922U (en) | 2011-12-31 | 2011-12-31 | Portable digital television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205704474U CN202395922U (en) | 2011-12-31 | 2011-12-31 | Portable digital television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202395922U true CN202395922U (en) | 2012-08-22 |
Family
ID=46670819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205704474U Expired - Lifetime CN202395922U (en) | 2011-12-31 | 2011-12-31 | Portable digital television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202395922U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102421018A (en) * | 2011-12-31 | 2012-04-18 | 青岛海信宽带多媒体技术有限公司 | Portable digital television |
-
2011
- 2011-12-31 CN CN2011205704474U patent/CN202395922U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102421018A (en) * | 2011-12-31 | 2012-04-18 | 青岛海信宽带多媒体技术有限公司 | Portable digital television |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120822 |