CN2834059Y - Apparatus for playing digital TV signals on LED display screen - Google Patents
Apparatus for playing digital TV signals on LED display screen Download PDFInfo
- Publication number
- CN2834059Y CN2834059Y CNU2005201280148U CN200520128014U CN2834059Y CN 2834059 Y CN2834059 Y CN 2834059Y CN U2005201280148 U CNU2005201280148 U CN U2005201280148U CN 200520128014 U CN200520128014 U CN 200520128014U CN 2834059 Y CN2834059 Y CN 2834059Y
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- led display
- display screen
- digital
- utility
- signal
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Abstract
The utility model relates to a device which plays digital television signals with an LED display screen, which is composed of a tuner, a demodulator, a transport stream demultiplexer, an MPEG decoder, a digital RGB converter, the LED display screen, an audio D/A converter and an audio amplifier. The utility model can directly convert the digital television signals to RGB trichromatic gray scale data needed by the LED display screen, and the LED display screen can directly play the digital television signals. With the utility model, a television station is used as a play control center and the LED display screen can be networked with low cost. Tens of networked LED display screens are arranged at the busy road sections of cities, a public information frequency channel is especially established by the television station to specially play news on current events, economic and financial reports, sports events, traffic, weather information, etc. focused by the public. The resources of social and public information can be developed, and the utility model is favorable for the popular spread of the public information.
Description
Technical field
The utility model relates to a kind of device with the LED display playing digital television signal, belongs to broadcast, transmission, the Display Technique field of information.
Technical background
In the prior art, place the LED display system of busy section of town, generally be to control with computer, at first computer receives the vision signal from VCD, DVD, TV station, video camera etc., computer converts the vision signal that receives to digital signal then, this digital signal converts the required RGB three primary colors gradation data of LED display at last to, becomes image and broadcasts.This system block diagram as shown in Figure 1, its shortcoming is:
1, the editor of information, control, broadcast are all carried out in computer, and the memory space of information is restricted.
2, the distance between computer and the display screen is restricted, and transmission range has only 300 meters farthest.
3, the outdoor LED display screen major part is arranged on bustling location, because limited transmission distance must be rented a house as the control room near display screen, thereby increased the broadcast cost.
4,, thereby make the information coverage of display screen polylith networking limited owing to limited transmission distance.
5, transmission line adopts cable or netting twine, need drive circuit and long line receiving card, increase cost on the one hand, on the other hand, owing to connect complicated, if it is mishandling, a connector, a bit of cable, even the wiring on the printed circuit board (PCB), the capital influences play quality, and the maintenance of circuit, maintenance are all inconvenient.
Summary of the invention
The purpose of this utility model is to propose a kind of device with the LED display playing digital television signal, to overcome the shortcoming of prior art, enlarge the information coverage of display screen polylith networking, and a center control is carried out in the networking of display screen, display screen in the networking broadcasts automatically, need not personnel guard, control, broadcast cost to reduce.System is more simplified, to improve the reliability that signal broadcasts.
The device that the utility model proposes with the LED display playing digital television signal, as shown in Figure 2, constitute by tuner, demodulator, transmission flow demultiplexing device, mpeg decoder, digital rgb transducer, LED display, audio D/A converter and audio frequency amplifier.Digital television signal carries out low noise amplification, filtering and frequency conversion by tuner, converts thereof into the intermediate-freuqncy signal I and the Q of two-way phase phasic difference 90 degree; After I, Q signal convert digital signal to through the double A/D transducer in the demodulator, again by demodulator carry out demodulation, deinterleave, a series of processing such as Reed-Solomon decoding, become transmission code stream; Transmission code stream is decomposed into sound, video data elementary stream through the transmission flow demultiplexing device; Sound, video data elementary stream are reduced into original sound, video data through mpeg decoder; Become RGB three primary colors gradation data behind the video data process digital rgb transducer and be transferred to LED display; Voice data is delivered to audio D/A converter and is converted the binaural audio signal to, amplifies back output by audio frequency amplifier again.
The device that the utility model proposes with the LED display playing digital television signal, directly receive the digital television signal of TV station, through tuner, demodulator, transmission flow demultiplexing device, mpeg decoder, digital rgb transducer, LED display, audio D/A converter and audio frequency amplifier, digital television signal can directly be broadcasted on LED display.Utilizing device of the present utility model, can use lower cost, is to broadcast control centre to network with the TV station with LED display.The LED display of tens networkings is set in the bustling highway section in city, offer a public information channel specially by TV station, specially broadcast the popular social hotspots of being paid close attention to, topical news, financial statement, amusement dynamically, national policy, national economy statistics, survey report, competitive sports, traffic, Weather information etc., can develop social public information resource, help the popular transmission of public information.
With respect to the display screen of computer control, adopt the display screen of this utility model device, as broadcasting control centre, advantage is by TV station:
1. the networking coverage is big.LED display adopts television network not to be subjected to the restriction of region and effective propagation path, and the networking coverage can reach the whole city, the whole province or even the whole nation.
2. abundant information, in time.Can broadcast the news that TV station gathers and edits, financial information etc.
3. reliable, strong interference immunity.The LED display of networking has improved anti-jamming capacity greatly owing to adopt digital television techniques to carry out the transmission of signal.
4. be convenient to unified control.The LED display of networking need not personnel the guard, TV station broadcasts control centre can unify control to the whole city, the whole province tens, the LED display of hundreds of piece networking.
Description of drawings
Fig. 1 is a system schematic of playing the computer output signal in the prior art with LED display.
Fig. 2 is the structural representation of the utility model device.
Embodiment
The device that the utility model proposes with the LED display playing digital television signal, as shown in Figure 2, constitute by tuner, demodulator, transmission flow demultiplexing device, mpeg decoder, digital rgb transducer, LED display, audio D/A converter and audio frequency amplifier.At first receive the digital television signal that TV station broadcasts, comprise digital satellite signal, digital cable signal and digital ground signal, and convert thereof into intermediate-freuqncy signal by low noise amplification, filtering and frequency conversion by tuner.Demodulator carries out a series of processing such as demodulation to signal then, become transmission code stream, difference according to signal, demodulator carries out different demodulation respectively to digital satellite signal, digital cable signal and digital ground signal, for example digital satellite signal is carried out QPSK demodulation and satellite channel forward error correction decoding, digital wire signal is carried out QAM demodulation and wire message way forward error correction decoding.Transmission code stream is decomposed into single program stream earlier through the transmission flow demultiplexing device, and is decomposed into sound, video data elementary stream then.Sound, video data elementary stream are delivered to mpeg decoder respectively, after decoding, are reduced into original sound, video data.Wherein become RGB three primary colors gradation data behind the video data process digital rgb transducer and be transferred to LED display.Voice data is delivered to audio D/A converter and is converted the binaural audio signal to, exports to audio amplifier after being amplified by audio frequency amplifier again.Using this device can be to broadcast control centre to network with LED display with the TV station.
Claims (3)
1, a kind of device with the LED display playing digital television signal is made of tuner, demodulator, transmission flow demultiplexing device, mpeg decoder, digital rgb transducer, LED display, audio D/A converter and audio frequency amplifier.
2, device as claimed in claim 1 is characterized in that receiving digital television signal, comprises digital satellite signal, the digital cable signal, and the digital ground signal, and digital television signal converts the required RGB three primary colors gradation data of LED display to the most at last.
3, device as claimed in claim 1 is characterized in that the video data of mpeg decoder output becomes RGB three primary colors gradation data for the LED display broadcast through the digital rgb transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201280148U CN2834059Y (en) | 2005-10-11 | 2005-10-11 | Apparatus for playing digital TV signals on LED display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201280148U CN2834059Y (en) | 2005-10-11 | 2005-10-11 | Apparatus for playing digital TV signals on LED display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2834059Y true CN2834059Y (en) | 2006-11-01 |
Family
ID=37198372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005201280148U Expired - Fee Related CN2834059Y (en) | 2005-10-11 | 2005-10-11 | Apparatus for playing digital TV signals on LED display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2834059Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222467A (en) * | 2011-06-22 | 2011-10-19 | 冉红 | Light emitting diode (LED) television display control system |
-
2005
- 2005-10-11 CN CNU2005201280148U patent/CN2834059Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102222467A (en) * | 2011-06-22 | 2011-10-19 | 冉红 | Light emitting diode (LED) television display control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |