CN2831644Y - Computer receiver of compatible multi-kinds ground digital TV standards by USB interface - Google Patents
Computer receiver of compatible multi-kinds ground digital TV standards by USB interface Download PDFInfo
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- CN2831644Y CN2831644Y CN 200520065452 CN200520065452U CN2831644Y CN 2831644 Y CN2831644 Y CN 2831644Y CN 200520065452 CN200520065452 CN 200520065452 CN 200520065452 U CN200520065452 U CN 200520065452U CN 2831644 Y CN2831644 Y CN 2831644Y
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Abstract
The utility model relates to a computer receiver which can be compatible with various ground digital TV standards via USB interfaces, and the utility model comprises a tuning device, a channel Decoder device and a USB interface device. In addition, the device is added with a control switch device and a channel demodulation device so as to accomplish the compatible reception of various ground digital television standards, the device can be compatible with various ground digital TV transmission standards and can provide television programs to computer users at any time. On the basis of existing computer hardware, the utility model is improved a little and the utility model has the advantages of convenient installation and operation and low cost.
Description
Technical field
The utility model relates to the receiving equipment of ground digital television signal, the compatible receiving system of the computer of particularly current various standard ground digital television signals.
Background technology
The development of digital technology has promoted simulated television and has changed to Digital Television, and this transformation is that relay is looked technology from the again leap of black and white after the colour development.At present, because ground digital television broadcast has wide coverage, supports to move advantages such as reception, multi-media communication, therefore develop rapidly all over the world.Because various reasons such as politics, economy, region, terrestrial DTV standard and disunity, the standard that is shaped has Europe (DVB-T), North America (ATSC) and Japan's (ISDB-T) three kinds of terrestrial DTV international standards at present, China is also in the standard of formulating oneself, and total Tsing-Hua University (DMB-T), Shanghai Communications University (ADTB-T) and institute of wide section several schemes such as (CDTB-T) are selective.Which type of standard such as present domestic employing Europe (DVB-T) standard, Tsing-Hua University (DMB-T) scheme, Shanghai Communications University (ADTB-T) scheme has, different cities adopts different standards to carry out commercial broadcasting, even same city Different Ground digital television broadcasting company, adopt various criterion (scheme) to broadcast simultaneously at areal.
Now, USB interface has become the standard configuration of computer, adopts the computer of the ground digital television receiving set of USB interface, mainly is to solve the problem that the computer user watches Digital Television, for these users provide convenience.Because the notebook computer user uses digital television receiving apparatus at different cities, country variant, if the user will change different receiving boxes in different regions, the user will buy 4～5 receiving boxes, and in different regions, which receiving box the user must attempt determining to use.From use angle, this obviously has great limitation and inconvenience, and actually, it is unpractical allowing the user buy 4～5 kinds of receiving systems, not only extremely unreasonable economically, carries also very difficultly, and the user also is difficult to accept.Therefore be necessary to develop a kind of ground digital television receiving set that can be applied to the standard of the compatibility in the computer.
Summary of the invention
The purpose of this utility model is, for the user provides a kind of computer receiving system by the multiple terrestrial DTV standard of usb compatible, this device can compatible multiple terrestrial DTV transmission standard, the TV programme that can Gong watch at any time is provided for the computer user.
Another purpose of the present utility model is to provide the computer receiving system of the multiple terrestrial DTV standard of a kind of compatibility, and this device is slightly done improvement and just can be implemented on the basis of existing computer hardware, and easy to install, cost of manufacture is cheap.
Based on this, the computer receiving system of the compatible multiple terrestrial DTV standard that the utility model provides, its thinking is by increase switching device and corresponding channel demodulation device on the basis of original computer hardware, just can realize discerning automatically the ground digital television broadcast standard, compatible global various terrestrial DTV standards.Buy 1/3rd of 4～5 kinds of receivers before its cost has only respectively, and install, use all easier than originally.
The technical solution of the utility model is as follows:
A kind of computer receiving system by the multiple terrestrial DTV standard of usb compatible, this device comprises tuner, channel decoding device and USB interface device, in addition, this device has increased control switch device and channel demodulation device again, receives with the compatibility that realizes multiple terrestrial DTV standard; After wherein tuner was connected in USB interface, output was play after the TV signal channel decoding device of its reception, channel demodulation device and the decoding of control switch device, the demodulation.
Pass through the channel demodulation device and the control switch device of increase like this, the digital television receiving apparatus that can only receive certain single terrestrial DTV transmission standard originally is set to receive the receiving system of the digital television signal of multiple standards, and this device can be watched the television channel that locality or oneself are liked at any time with user's the selection and the difference of geographic area.
The computer receiving system of the multiple terrestrial DTV standard of described compatibility, its control switch can be arranged between USB interface and the channel demodulation device, also can be arranged between channel demodulation device and the output port.
The computer receiving system of the multiple terrestrial DTV standard of described compatibility, its control switch device is a multi-channel switching device, is convenient to control multiple ground digital television signal.
Generally speaking, there are hilted broadsword four throw switches control switch device the inside, and correspondence is connected with channel demodulation, and four end points of this switch correspond respectively to the channel demodulation device (generally adopting demodulator) of existing four kinds of terrestrial DTV transmission standards (scheme) at present.
Above-mentioned switch is a controllable electronic switch, its transfer contact is attached to the output of channel tuner device as input, other four end points are as output, be attached to the input corresponding to the channel demodulation device of a kind of standard (scheme) respectively, control end is attached to the control signal output ends of USB controller.
The channel demodulation device adopts a plurality of, during with existing terrestrial DTV conformance to standard, this channel demodulation device has four, the input of each channel demodulation device, be attached to an output of above-mentioned switch respectively, signal to four kinds of terrestrial broadcasting standards (scheme) carries out demodulation respectively, and the output connect in parallel of four channel demodulators is to the input of USB controller, and the output of USB controller and computer USB interface link.
Tuner, USB controller are all public by four kinds of broadcast standards at present.Can be provided with especially.
The course of work of this computer receiving system by the multiple terrestrial DTV standard of usb compatible is as follows:
Connect reception antenna at the receiving box input, receiving box is received on the USB interface of computer.After the start, operation ground digital television broadcast receiving software.By USB control electronic switch, switch to different channel demodulation passages.If this passage conforms to local ground digital television broadcast standard, then can detect the output of TS stream in USB port, lock the current location that this electronic switch is connected simultaneously.Computer is used the software demultiplexing after receiving program TS stream, and plays respective program.
The utility model has following effect:
At first, because its compatibility makes the user obtain material benefit.The user just can discern and watch the digital television program of any ground standard transmission automatically as long as buy a this receiving system, and this is former to be impossible.This device can compatible multiple terrestrial DTV transmission standard, for the computer user provides the TV programme that can Gong watch at any time, this is especially convenient to the notebook computer user that global range goes from place to place, and has really realized the mobile reception of global range.
Secondly, because the receiving system of this compatibility of the utility model is incorporate, realized the public of existing resources such as tuner, USB controller cleverly by using cheap switch, this device is slightly done improvement and just can be implemented on the basis of existing computer hardware, easy to install, cost of manufacture is cheap.Therefore adopt the independent receiver that is provided with to compare with original, two remarkable advantages are arranged: the one, cost reduces (as long as original receiver 30%) significantly, and the 2nd, the simplicity of installing and the adaptability of use all are that previous status is incomparable.
Its three because this device has above-mentioned advantage, its convenience, practicality all can be subjected to user's welcome, thereby can accelerate the universal process of Digital Television greatly, for industry development and social progress contribute.
Description of drawings
Fig. 1 is the schematic diagram of the utility model tuner apparatus,
Fig. 2 is the schematic diagram of the utility model switching device,
Fig. 3 is the schematic diagram of the utility model channel decoding device,
Fig. 4 is the schematic diagram of the utility model USB control device,
Fig. 5 is a structural representation of the present utility model,
Fig. 6 is the circuit diagram of the utility model specific embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a terrestrial DTV receiver tuner apparatus 1, comprises tuner input 11 and tuner intermediate frequency output 12.By tuner apparatus input signal is converted to intermediate frequency 36.125MHZ.
Fig. 2 is terrestrial DTV receiver hilted broadsword four throw switch devices 2, comprises input 21 and frequency output 22～25.Intermediate-freuqncy signal through switch, is connected to 22 or 23 or 24 or 25 outputs after input 21 inputs.
Fig. 3 separates CU channel unit 3 for the terrestrial DTV receiver, comprises DVB-T passage 31, ATSC passage 32, ISDB-T passage 33 and DMB-T passage 34.The demodulation of intermediate-freuqncy signal channel obtains MPEG-2TS stream and exports from output.
Fig. 4 is a terrestrial DTV receiver USB control device 4, comprises input 41 and output 42.TS stream exports computer to from the 42USB interface after USB handles after input 41 inputs.
Fig. 5 is the overall structure schematic diagram of the utility model embodiment, and signal after tuner 1 is tuning, is converted to intermediate frequency from the antenna input, is input to switching device 2 inputs.Switch is connected respectively and is separated four channel demodulation passages of CU channel unit 3 by the control of USB controller.If the local signal standard is consistent with this channel, then separating the channel output just has the output of TS stream, and switch keeps this channel strobe state.The input 41 of four channel TS stream output input in parallel USB control devices 4.After the USB interface device is handled, export computer USB interface end to from USB output 42.TS flows through after software demultiplexing, the decoding, plays on computers.
Fig. 6 is the circuit diagram of the utility model specific embodiment.
Among the figure, U1 is an input aerial.U2 is a tuner, and model is TUA6034, and VHF, uhf band signal are downconverted to intermediate frequency 36.125MHZ output.
K1 is a controllable electronic switch, is used to connect four kinds of standard channels, and its model is KT88.Separate channel by identification and have or not the output of TS stream, can determine which kind of standard local ground digital television broadcast is, thereby will connect corresponding channel demodulator.
U3:DVB-T separates channel chip, and model is MT352, is used for the demodulation of European terrestrial DTV standard channel.
U4:ATSC separates channel chip, and model is LGT3303, is used for North America terrestrial DTV standard channel demodulation.
U5:ISDB-T separates channel chip, and model is LGT4000, is used for the demodulation of Japanese terrestrial DTV standard channel.
U6:DNB-T separates channel chip, and model is LGS-8222-A1, is used for Chinese Tsing-Hua University terrestrial DTV scheme channel demodulation.
The U7:USB interface control chip, model is CY7C68013, is used to receive TS stream, and by USB interface, is sent to Computer Processing.
U8: computer, software demultiplexing, decoding, and play on computers.
Connection has just constituted a specific embodiment of the present utility model to above-mentioned device as figure.
The input of switch is attached to the tuner medium frequency output end, and four outputs of switch are received the input of separating channel corresponding to a kind of standard channel respectively, and the switch control end is attached to the control signal output ends PIN10 of USB interface control chip U7.
Four output connect in parallel of separating channel are to usb interface controller U7 input PIN72～79.
The course of work is as follows.
Under the control of control signal, described switch is separated tuner output channel chip and is connected with four respectively, one of each gating.Behind the gating, conform to local ground digital television broadcast standard if separate channel, then separating the channel output just has the output of TS stream, and computer is just with this on off state locking.For example, if the user is European, because local standard is DVB-T, therefore, system can recognize local transmission standard automatically, and the PIN6 that switch is got to U3 holds, connection DVB-T channel demodulation.Signal from PIN21～28 outputs of U3, is delivered to U7, and then is delivered to computer U8 by USB interface after the U3 demodulation.Computer with software with the input transmission stream decoding audio, vision signal, the sound accompaniment that plays sound on computers, display image.
The newly-increased humorous device of channel demodulation adds that the humorous device of original channel demodulation has four humorous devices of channel demodulation, corresponds respectively to four kinds of ground transmission standards, and its course of work is the same.
Claims (6)
1, a kind of computer receiving system by the multiple terrestrial DTV standard of usb compatible, this device comprises tuner, channel decoding device and USB interface device, it is characterized in that this device has increased control switch device and channel demodulation device again, after wherein tuner was connected in USB interface, output was play after the TV signal channel decoding device of its reception, channel demodulation device and the decoding of control switch device, the demodulation.
2, the computer receiving system of the multiple terrestrial DTV standard of compatibility as claimed in claim 1 is characterized in that control switch can be arranged between USB interface and the channel demodulation device, also can be arranged between channel demodulation device and the output port.
3, the computer receiving system of the multiple terrestrial DTV standard of compatibility as claimed in claim 1 is characterized in that its control switch device is a multi-channel switching device.
4, the computer receiving system of the multiple terrestrial DTV standard of compatibility as claimed in claim 3, it is characterized in that there are hilted broadsword four throw switches control switch device the inside, and correspondence is connected with channel demodulation, and four end points of this switch correspond respectively to the channel demodulation device of existing four kinds of terrestrial DTV transmission standards at present.
5, the computer receiving system of the multiple terrestrial DTV standard of compatibility as claimed in claim 4, it is characterized in that above-mentioned switch is a controllable electronic switch, its transfer contact is attached to the output of channel tuner device as input, other four end points are as output, be attached to the input corresponding to the channel demodulation device of a kind of standard (scheme) respectively, control end is attached to the control signal output ends of USB controller.
6, the computer receiving system of the multiple terrestrial DTV standard of compatibility as claimed in claim 1, it is characterized in that this channel demodulation device has four, the input of each channel demodulation device, be attached to an output of above-mentioned switch respectively, signal to four kinds of terrestrial broadcasting standards (scheme) carries out demodulation respectively, the output connect in parallel of four channel demodulators is to the input of USB controller, and the output of USB controller and computer USB interface link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520065452 CN2831644Y (en) | 2005-09-30 | 2005-09-30 | Computer receiver of compatible multi-kinds ground digital TV standards by USB interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520065452 CN2831644Y (en) | 2005-09-30 | 2005-09-30 | Computer receiver of compatible multi-kinds ground digital TV standards by USB interface |
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| Publication Number | Publication Date |
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| CN2831644Y true CN2831644Y (en) | 2006-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520065452 Expired - Fee Related CN2831644Y (en) | 2005-09-30 | 2005-09-30 | Computer receiver of compatible multi-kinds ground digital TV standards by USB interface |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8212940B2 (en) | 2006-12-06 | 2012-07-03 | Dave Xiao Dong Yang | Hybrid architecture of TV receiving devices |
| CN105915824A (en) * | 2015-12-13 | 2016-08-31 | 乐视致新电子科技（天津）有限公司 | Module group capable of performing signal demodulation and device thereof |
| CN107343217A (en) * | 2017-05-23 | 2017-11-10 | 数源久融技术有限公司 | Plurality of information resources receiving and transmitting control devices and method |
-
2005
- 2005-09-30 CN CN 200520065452 patent/CN2831644Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8212940B2 (en) | 2006-12-06 | 2012-07-03 | Dave Xiao Dong Yang | Hybrid architecture of TV receiving devices |
| CN105915824A (en) * | 2015-12-13 | 2016-08-31 | 乐视致新电子科技（天津）有限公司 | Module group capable of performing signal demodulation and device thereof |
| CN107343217A (en) * | 2017-05-23 | 2017-11-10 | 数源久融技术有限公司 | Plurality of information resources receiving and transmitting control devices and method |
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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: 20061025 Termination date: 20130930 |