CN201986051U - Television with audio/video output function - Google Patents
Television with audio/video output function Download PDFInfo
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- CN201986051U CN201986051U CN2011200829986U CN201120082998U CN201986051U CN 201986051 U CN201986051 U CN 201986051U CN 2011200829986 U CN2011200829986 U CN 2011200829986U CN 201120082998 U CN201120082998 U CN 201120082998U CN 201986051 U CN201986051 U CN 201986051U
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Abstract
The utility model discloses a television with an audio/video output function, which comprises a high-frequency head, a main chip, a signal source input interface and an audio/video output interface. The television is also provided with an audio/video decoding unit, wherein the audio/video decoding unit is connected with the signal source input interface or the high-frequency head by a demodulation chip; and the audio/video signal output by an external signal source is decoded and is output to the audio/video output interface. The television disclosed by the utility model not only has the audio/video output function, and the audio/ video signal output by the television is not limited to the program content played by the television at present; and two televisions can be really used for playing two sets of programs to well meet the watching requirement of users.
Description
Technical field
The utility model belongs to the TV receiving apparatus technical field, specifically, relates to a kind of television set with audio frequency and video output function.
Background technology
For present television receiver, generally do not have the audio frequency and video output function, even some tv product has disposed AV OUT output interface, also can only export the programme content of the current broadcast of television set.For the average family of purchasing two television sets, generally have only a set-top box or can only use a cable TV signal head, even two television sets are connected on set-top box or the cable TV signal head simultaneously, two television sets also can only be play same TV programme.If a television set (can be understood as slave) is connected on the AV OUT output interface of an other television set (can be understood as main frame), owing in main frame, only be provided with a decoding master chip MCU, referring to television signal treatment system shown in Figure 1, only can handle one tunnel signal source at synchronization, therefore, signal by its AV OUT interface output can only be a same road signal with the program of the current broadcast of main frame also, thereby make main frame and slave can only play same programme content, this is not have very big practical significance to most of users.
Summary of the invention
The utility model can only be to the limitation of the current in progress programme content of outside media device output television set in order to overcome existing television set, a kind of television set with audio frequency and video output function is provided, make the audio-video signal of exporting by television set no longer be confined to the current in progress programme content of television set, realize the audio frequency and video output function veritably.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of television set with audio frequency and video output function comprises tuner, master chip, signal source input interface and audio and video output interface; In described television set, also be provided with the audio/video decoding unit, connect described signal source input interface or connect described tuner by demodulation chip, after receiving the audio/video signal of outside source output and carrying out decoding processing, export described audio and video output interface to.
In order to realize that two television sets can play different TV programme simultaneously, described tuner is provided with two-way, and the demodulation chip of leading up to connects described master chip, and another road connects described audio/video decoding unit by demodulation chip.
Further, the described tuner of two-way all connects described master chip by bus, receives the control signal of master chip output, receives the cable TV signal of different channel with control two-way tuner.
Further again, described audio/video decoding unit is connected communication with described master chip, selects the output of decoding of one tunnel signal source under the control of master chip.
Preferably, described audio/video decoding unit is connected communication by bus with described master chip.
Switch for each road signal source being carried out gating, each the road audio/video signal by described signal source input interface and demodulation chip output exports described audio/video decoding unit to after switching circuit and carry out gating through one.
Wherein a kind of design as described commutation circuit, in described commutation circuit, include a multichannel and switch chip, the alternative passage of multichannel that described multichannel switches chip connects one to one with the output of signal source input interface and demodulation chip respectively, its common port connects described audio/video decoding unit, its channel selecting port connects described master chip, receives the switch-over control signal of master chip output.
Another design as described commutation circuit, in described commutation circuit, include a plurality of switch elements, its switch ways is connected between the output of described audio/video decoding unit and described signal source input interface and/or demodulation chip correspondingly, the control end of a plurality of switch elements all is connected with described master chip, receives the switch-over control signal of master chip output.
Further again, described signal source input interface is at least a in HDMI interface, VGA interface, YPBPR interface, S-Video interface and the AV interface.
A nearlyer step, described audio/video decoding unit preferably adopts a microprocessor Design with audio/video decoding function to realize.
Compared with prior art, advantage of the present utility model and good effect are: television set of the present utility model not only has the audio frequency and video output function, and no longer be confined to the programme content of the current broadcast of television set by the audio-video signal of its output, can realize function veritably, satisfy user's rating demand well by two television for play two programs.
After reading the detailed description of the utility model execution mode in conjunction with the accompanying drawings, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the system architecture schematic diagram of a kind of embodiment of existing television signal treatment system;
Fig. 2 is the signal processing system configuration diagram of a kind of embodiment of the television set with audio frequency and video output function that proposes of the utility model;
Fig. 3 is the schematic block circuit diagram of a kind of embodiment of the television set with audio frequency and video output function that proposes of the utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is done explanation in further detail.
Embodiment one, present embodiment can no longer be confined to the programme content of the current broadcast of television set for the audio-video signal that makes television set output, and realize the selection output function of audio-video signal veritably, on the basis of existing TV set circuit, increased an audio/video decoding unit, as shown in Figure 2, described audio/video decoding unit can specifically select for use a microprocessor MCU with audio/video decoding function to realize, connect the signal source input interface on the television set, such as the HDMI interface, the VGA interface, the YPBPR interface, S-Video interface and AV interface etc., can be wherein one or more, can certainly be further by the tuner in the demodulation chip connection television set, the cable TV signal of the audio/video signal of selective reception outside source output or tuner output, after carrying out decoding processing, export audio and video output interface AV_OUT-2 to.Described audio and video output interface AV_OUT-2 is arranged on the tv shell, is used to connect outside multimedia equipment, such as television set etc., and then the programme content of television set output is displayed the play on multimedia equipment.
For the multimedia equipment that can receive digital audio-video signal, can directly transfer to the multimedia equipment of outside by the digital audio/video signal (such as the CVBS signal) of the decoding of the microprocessor MCU in television set output by audio and video output interface AV_OUT-2.And for the multimedia equipment that can only receive the analog audio-video signal, also D/A converting circuit DAC2 need be set in television set, as shown in Figure 2, be connected between MCU and the audio and video output interface AV_OUT-2, after the digital audio/video conversion of signals of MCU output is analog signal, transfers to outside multimedia equipment by audio and video output interface AV_OUT-2 and play.
For the television set that only disposes one road tuner, when the television for play cable TV signal, wherein one tunnel signal source that can select to be connected with signal source input interface (such as HDMI interface, VGA interface, YPBPR interface, S-Video interface and AV interface etc.) is communicated with described MCU, the audio/video signal that outside source is provided transfers to MCU and carries out decoding processing, and then generates the audio/video signal and transfer to outside multimedia equipment by audio and video output interface AV_OUT-2 and play.And when television set is selected to play the audio/video program of outside a certain signal source output, can select cable television program with other signal sources or tuner demodulation output to transfer to MCU and carry out decoding processing, and then, play audio/video program or cable television program from other signal sources via the multimedia equipment that audio and video output interface AV_OUT-2 transfers to the outside.
If want to realize two cable television programs that television for play is different, two tuners (perhaps connecting the set-top box that is built-in with two tuners) can be set in the television set as main frame, one road tuner connects the television set master chip by demodulation chip, another road tuner connects described MCU by demodulation chip, and the control pin of two-way tuner all passes through I
2The C bus connects master chip, and by the TV signal of master chip control two-way tuner reception different channel, after the demodulation chip demodulation, correspondence transfers to master chip and MCU carries out decoding processing respectively, plays respectively at main frame with on as the television set of slave then.
Select as for MCU which audio/video signal is carried out decoding processing, can be by the master chip unification control of television set inside, as shown in Figure 2.MCU is connected communication with master chip, specifically can adopts I
2Forms such as C bus realize the connection between the two.Utilize master chip to receive the signal source selection instruction of user, specifically can select the signal source that is input to the signal source of master chip and is input to MCU by transferring System menu by remote controller or keypad input.Master chip is operated the generation control command according to the user and is exported MCU to, and then controls MCU road audio/video signal of choosing is carried out decoding processing, exports outside multimedia equipment to by audio and video output interface AV_OUT-2 then.Thus one, television set can be play different programs at one time with multimedia equipment, has fully satisfied user's rating demand.Certainly, also can select television set and multimedia equipment to play same programme content, only need in System menu, to select same signal source to get final product.
Certainly, also can on tv shell, set up one tunnel audio and video output interface AV_OUT-1 again, connect the television set master chip, perhaps connect the television set master chip by D/A converting circuit DAC1, as shown in Figure 2, the audio/video signal of master chip decoding output when transferring to television set display panel and voice-grade channel, is transferred to outside multimedia equipment by audio and video output interface AV_OUT-1, such as television set.When the identical programme content of two television for play of needs, can directly slave be plugged on the audio and video output interface AV_OUT-2 of main frame, need not to start the playing programs function that MCU in the main frame can realize two television sets.
In order to save the port resource of MCU, present embodiment preferably further is provided with commutation circuit again in TV set circuit, utilize commutation circuit to each the road audio/video signal by the output of signal source input interface and demodulation chip through carrying out gating control, and then the road audio/video signal that will choose transfers to MCU and carries out decoding processing.
As a kind of preferred design, described commutation circuit can adopt a multichannel switching chip to carry out specific design, referring to shown in Figure 3.Multichannel is switched the alternative passage A1 of multichannel, the A2 of chip ... An connects one to one with the signal source input interface (such as HDMI interface, VGA interface, YPBPR interface, S-Video interface and AV interface etc.) and the output of demodulation chip respectively, its common port COM connects MCU, channel selecting port SEL connects master chip, receive the switch-over control signal of master chip output, and then select wherein one tunnel alternative passage A
iCOM is communicated with common port, and the road signal source that the user is selected transfers to after MCU carries out decoding processing, plays by the output of external multimedia equipment.
Certainly, described commutation circuit also can adopt other multiple versions to set up and realize, such as adopting a plurality of switch elements to be connected between each road signal source and the MCU.Promptly, the switch ways of a plurality of switch elements is connected between the output of described MCU and signal source input interface (such as HDMI interface, VGA interface, YPBPR interface, S-Video interface and AV interface etc.) and/or demodulation chip correspondingly, the control end of a plurality of switch elements all is connected with described master chip, master chip is according to user's operation, generate corresponding switch-over control signal and export each way switch element to, a control way switch element conductive wherein, and then will be connected signal source with it and transfer to MCU and carry out decoding processing.The components and parts that described switch element can select for use transistor or field effect transistor etc. to have on-off action realize that present embodiment is not limited in above giving an example.
Two processors with audio/video decoding function---master chip and MCU(are certain by being provided with simultaneously in TV set circuit for the utility model, also can adopt a double-core master chip to replace above-mentioned monokaryon master chip and MCU, finish the two-way decoding task), thereby can handle the different audio/video signal of two-way simultaneously, and then make the multimedia equipment that links to each other with this machine can play the programme content different with this machine, satisfied the impression of viewing and admiring of different user, enrich user's entertainment life, really realized the audio frequency and video output function of television set.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (10)
1. the television set with audio frequency and video output function comprises tuner, master chip, signal source input interface and audio and video output interface; It is characterized in that: in described television set, also be provided with the audio/video decoding unit, connect described signal source input interface or connect described tuner by demodulation chip, after receiving the audio/video signal of outside source output and carrying out decoding processing, export described audio and video output interface to.
2. the television set with audio frequency and video output function according to claim 1 is characterized in that: described tuner comprises two-way, and the demodulation chip of leading up to connects described master chip, and another road connects described audio/video decoding unit by demodulation chip.
3. the television set with audio frequency and video output function according to claim 2 is characterized in that: the described tuner of two-way all connects described master chip by bus, receives the control signal of master chip output.
4. according to each described television set with audio frequency and video output function in the claim 1 to 3, it is characterized in that: described audio/video decoding unit is connected communication with described master chip.
5. the television set with audio frequency and video output function according to claim 4 is characterized in that: described audio/video decoding unit is connected communication by bus with described master chip.
6. according to each described television set in the claim 1 to 3 with audio frequency and video output function, it is characterized in that: each the road audio/video signal by the output of described signal source input interface and demodulation chip exports described audio/video decoding unit to after switching circuit and carry out gating through one.
7. the television set with audio frequency and video output function according to claim 6, it is characterized in that: in described commutation circuit, include a multichannel and switch chip, the alternative passage of multichannel that described multichannel switches chip connects one to one with the output of signal source input interface and demodulation chip respectively, its common port connects described audio/video decoding unit, its channel selecting port connects described master chip, receives the switch-over control signal of master chip output.
8. the television set with audio frequency and video output function according to claim 6, it is characterized in that: in described commutation circuit, include a plurality of switch elements, its switch ways is connected between the output of described audio/video decoding unit and described signal source input interface and/or demodulation chip correspondingly, the control end of a plurality of switch elements all is connected with described master chip, receives the switch-over control signal of master chip output.
9. the television set with audio frequency and video output function according to claim 6 is characterized in that: described signal source input interface is at least a in HDMI interface, VGA interface, YPBPR interface, S-Video interface and the AV interface.
10. the television set with audio frequency and video output function according to claim 6 is characterized in that: described audio/video decoding unit is one to have the microprocessor of audio/video decoding function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200829986U CN201986051U (en) | 2011-03-25 | 2011-03-25 | Television with audio/video output function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200829986U CN201986051U (en) | 2011-03-25 | 2011-03-25 | Television with audio/video output function |
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| Publication Number | Publication Date |
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| CN201986051U true CN201986051U (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200829986U Expired - Lifetime CN201986051U (en) | 2011-03-25 | 2011-03-25 | Television with audio/video output function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102665058A (en) * | 2012-04-01 | 2012-09-12 | 深圳市凯利华电子有限公司 | Miniature video converter |
| CN103108110A (en) * | 2011-11-10 | 2013-05-15 | 浙江南北联合信息科技有限公司 | Digital court hearing main unit and digital court hearing system |
-
2011
- 2011-03-25 CN CN2011200829986U patent/CN201986051U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103108110A (en) * | 2011-11-10 | 2013-05-15 | 浙江南北联合信息科技有限公司 | Digital court hearing main unit and digital court hearing system |
| CN103108110B (en) * | 2011-11-10 | 2016-08-17 | 浙江南北联合信息科技有限公司 | A kind of digital court trial main frame and digital court trial system |
| CN102665058A (en) * | 2012-04-01 | 2012-09-12 | 深圳市凯利华电子有限公司 | Miniature video converter |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |
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| CX01 | Expiry of patent term |