CN101313264A - Graphic card haveing a dmb function - Google Patents
Graphic card haveing a dmb function Download PDFInfo
- Publication number
- CN101313264A CN101313264A CNA2007800002607A CN200780000260A CN101313264A CN 101313264 A CN101313264 A CN 101313264A CN A2007800002607 A CNA2007800002607 A CN A2007800002607A CN 200780000260 A CN200780000260 A CN 200780000260A CN 101313264 A CN101313264 A CN 101313264A
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- signal
- dmb
- video card
- frequency
- terrestrial dmb
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Circuits Of Receivers In General (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The present invention relates to a graphic card and, more particularly, to a graphic card having a terrestrial Digital Multimedia Broadcasting (DMB) function, which can stimulate the proliferation of a desktop type computer market through the basic installation of a graphic card having a digital media broadcasting function at the time of designing a desktop type computer system, enables terrestrial DMB to be viewed using an existing computer by replacing an existing graphic card with only the graphic card, rather than replacing the entire computer with new one, can stably receive power from the main board of a computer in a universal serial bus communication manner, and can improve channel selectivity and also can completely overcome the problem of phase delay by converting a carrier into an intermediate frequency signal and then converting the intermediate frequency signal into baseband signals. The present invention provides a graphic card, the graphic card including a graphic unit that is responsible for computer graphic processing, wherein the graphic card is configured such that a terrestrial DMB unit for receiving terrestrial DMB is integrated with the graphic unit.
Description
Technical field
The present invention relates to a kind of video card, more particularly, relate to a kind of video card with T-DMB function, it can excite the growth of desktop computing market in the basic installation of design video card by having digital media broadcast function during desk side computer system, it makes that only replacing the active computer that has video card now with this video card by use just can watch T-DMB, and whole computing machine need not be replaced to new computing machine, this video card can stably receive power supply from computer motherboard with the USB (universal serial bus) communication mode, and can then intermediate-freuqncy signal be converted to the selectivity that baseband signal improves channel by carrier wave being converted to intermediate-freuqncy signal, can also overcome the problem of phase delay fully.
Background technology
DMB (DMB) is a kind of broadcast service with figure pattern modulation such as the various multi-media signals of sound signal and vision signal etc., and multi-media signal offered the receiver that is used for the fixing of communication media (vehicle) or moves, and be called as " hand held television (TV) ".Such DMB is divided into satellite dmb and terrestrial DMB, and the application relates to terrestrial DMB.Here, term " terrestrial DMB " is meant a kind of broadcast service, and it can transmit broadcast singal and can be by movably receiver reception via tellurian ground base station.
Summary of the invention
Technical matters
The object of the present invention is to provide a kind of video card, wherein, based on such fact, promptly, video card is installed in the desk-top computer basically as basic need, the terrestrial DMB function is embedded in this video card, thereby, only make that the installation by video card just can receive terrestrial DMB by desk-top computer.
Another object of the present invention is to provide a kind of video card, wherein, the terrestrial DMB unit is embedded into this video card, this video card must be installed in the desk-top computer basically, therefore only needs to replace existing video card with this video card like a cork by the user who has bought desk-top computer before making and just can receive terrestrial DMB.
Another purpose of the present invention is to provide a kind of video card, wherein, the terrestrial DMB unit is embedded into this video card, this video card must be installed in the desk-top computer basically, therefore by allowing the user who has newly bought desk-top computer this video card only to be installed and can be received terrestrial DMB, thereby, can stimulate computer market.
Another purpose of the present invention is to provide a kind of video card, and it can make the terrestrial DMB contents that is received by desk-top computer to be stored in the storer, thereby a kind of like this environment is provided, and in this environment, new content can processed and generation.
Another purpose again of the present invention is to provide a kind of video card, and it will convert intermediate-freuqncy signal to by the broadcast singal that the terrestrial DMB unit receives, and then convert intermediate-freuqncy signal to baseband signal, therefore increase the selectivity of channel and will have stoped phase delay.
Beneficial effect
The effect that the present invention has is, must the fact in the desk-top computer be installed basically as primary demand and embed the terrestrial DMB function based on video card, thereby terrestrial DMB can be received by desk-top computer by this video card only is installed.
The effect that the present invention has is, the terrestrial DMB unit is embedded in the video card that must be installed on substantially in the desk-top computer, thereby, only need easily just can receive terrestrial DMB with the existing video card of this video card replacement by allowing the user who has before bought desk-top computer.
The effect that the present invention has is, the terrestrial DMB unit is embedded in the video card that must be installed on substantially in the desk-top computer, thereby, by the user who allows newly to buy desk-top computer this video card only is installed and just can be received terrestrial DMB, therefore, can stimulate computer market.
The effect that the present invention has is, the terrestrial DMB contents that is received by desk-top computer is stored in the storer, thereby, the environment that can provide fresh content can be processed therein and to make.
The effect that the present invention has is that the broadcast singal that is received by the terrestrial DMB unit is converted into intermediate-freuqncy signal, and intermediate-freuqncy signal is converted into baseband signal more then, thereby, channel-selective can be improved and also phase delay can be prevented.
Description of drawings
Fig. 1 is the plan view that illustrates according to the video card of the embodiment of the invention;
Fig. 2 is the calcspar that video card shown in Figure 1 is shown;
Fig. 3 is the calcspar that the terrestrial DMB unit of video card shown in Figure 1 is shown;
Fig. 4 is the calcspar that the DMB front-end module of terrestrial DMB unit shown in Figure 3 is shown; And
Fig. 5 is the calcspar that the graphic element of video card shown in Figure 1 is shown.
Embodiment
Optimal case
In order to finish above-mentioned purpose, the present invention uses following embodiment to be achieved.
According to the first embodiment of the present invention, the invention provides a kind of video card, this video card comprises is responsible for the graphic element that computer graphical is handled, and wherein this video card terrestrial DMB unit and graphic element of being configured to be used to receive terrestrial DMB integrates.
According to a second embodiment of the present invention, the terrestrial DMB unit comprises: antenna is used to receive the ground broadcast signal that transmits from ground base station; And USB interface, be used for the output signal of terrestrial DMB unit is sent to computer motherboard, and receive power supply from mainboard.
A third embodiment in accordance with the invention, the terrestrial DMB unit comprises: the DMB front-end module, the high-frequency signal that is used for receiving from ground base station converts intermediate-freuqncy signal to; IF processing unit is used to receive the intermediate-freuqncy signal that transmits from the DMB front-end module, and eliminates direct current (DC) composition from the intermediate-freuqncy signal that is received; And baseband processing unit, be used to receive the signal that transmits from IF processing unit, the conversion of signals that receives is become digital signal, and digital demodulation signal is become video, audio frequency and data-signal.
A fourth embodiment in accordance with the invention, the DMB front-end module comprises: band-selective filter is used for only filtering the signal with required frequency band; Low noise amplifier is used for the signal by band-selective filter is amplified; Image-reject filter (imagerejection filter) is used for leaching the picture frequency by the signal of low noise amplifier output; Frequency mixer is used for converting the high-frequency signal from image-reject filter output to intermediate-freuqncy signal; Local oscillator, the local oscillation frequency signal is used to vibrate; Channel select filter is used for by only select the channel of needs from the intermediate-freuqncy signal of frequency mixer output with logical (band-pass) filtering; And intermediate frequency amplifier, be used to amplify the intermediate-freuqncy signal of having passed through channel select filter.
According to a fifth embodiment of the invention, graphic element comprises graphics engine (engine), is used to carry out dissimilar computer graphicals and handles; Display engine is used for receiving data and showing the data that receive from graphics engine; Host interface is used for providing interface between mainboard and graphics engine.
Before describing the present invention, describe present embodiment with reference to the accompanying drawings in detail.
Video card 1 of the present invention comprises terrestrial DMB unit 2 and graphic element 3.Terrestrial DMB unit 2 and graphic element 3 are integrated on the single plate.Therefore, by replacing the existing video card of user with video card of the present invention, the user just can see the terrestrial DMB on the desk-top computer.And, because the user who newly buys computing machine only the video card of the application of the invention just can watch terrestrial DMB, therefore, desktop computing market can be expanded.
The ground broadcast signal that is transmitted by ground base station is a kind of high-frequency signal, therefore need have the wave filter of high Q value so that only the channel selection of needs is come out when directly converting this high-frequency signal to baseband signal.Therefore, in order to overcome above-mentioned channel-selective problem, enforcement converts the ground broadcast signal that receives to intermediate-freuqncy signal, then intermediate-freuqncy signal is converted to two step processes of baseband signal, thereby only uses the wave filter with low reactance-resistance ratio just can realize higher channel-selective.And high-frequency signal has very short wavelength, therefore when the various circuit sections of its process, except that wave filter, owing to phase delay produces undesirable pseudomorphism (artifact).So when high-frequency signal was reduced to intermediate frequency, its wavelength can be elongated, therefore the problem about phase delay can access very large alleviating.Because this reason needs to implement two step converse routines.
With reference to Fig. 3, terrestrial DMB unit 23 comprises DMB front-end module 231, IF processing unit 235 and baseband processing unit 237.
DMB front-end module 231 is with high-frequency signal, that is, radio frequency (RF) signal (for example, the signal of frequency within 174 to 240MHz) from ground base station receives is converted to intermediate frequency (IF) signal (for example, frequency is the signal of 38.912MHz).With reference to Fig. 4, DMB front-end module 231 comprises: band-selective filter 2311 is used for by the rubbish frequency that filters the high-frequency signal that is received by antenna only by having the signal of needed frequency band; Low noise amplifier 2313 is used to amplify the signal through band-selective filter 2311; Image-reject filter 2317 is used for picture frequency is removed from the signal of low noise amplifier 2313 outputs; Frequency mixer 2319 is used for generating intermediate-freuqncy signal by being mixed with local oscillation (LO) frequency signal by the high-frequency signal of image-reject filter 2317 outputs, and the local oscillation frequency signal is by local oscillator 2331 vibrations and by phaselocked loop (PLL) 2333 lockings; Channel select filter 2323 is used for only needed channel selection being come out from the intermediate-freuqncy signal of frequency mixer 2319 outputs by bandpass filtering; Intermediate frequency amplifier 2325 is used to amplify the intermediate-freuqncy signal through channel select filter 2323.According to another embodiment, DMB front-end module 231 may further include well-known surface acoustic wave (SAW) wave filter 2327, and the intermediate-freuqncy signal that is used for being amplified by intermediate frequency amplifier 2325 accurately is divided into the wave band that each channel is scheduled to; Perhaps can be constructed to the gain detector 2321 of gain (gain) that is used to detect the intermediate-freuqncy signal of the output terminal output by frequency mixer 2319 is added to the output terminal of frequency mixer, and under the control that is provided between the input end of the output terminal of low noise amplifier 2313 and image-reject filter 2317 in gain detector the high-frequency gain controller 2315 of control high-frequency gain.In addition, in order to control, can add that gain detector 2335 and intermediate-frequency gain controller 2329 being set from the gain of the intermediate-freuqncy signal of intermediate frequency amplifier 2325 outputs.The DMB front-end module is used for converting high-frequency signal to intermediate-freuqncy signal.Therefore, as long as other method or structure outside the said method have been realized above-mentioned functions of the present invention, also be to be understood that it is modification example of the present invention.
IF processing unit 235 receives from the intermediate-freuqncy signal of DMB front-end module 231 outputs, and eliminates the direct current composition from the intermediate-freuqncy signal that receives.
Baseband processing unit 237 receiving intermediate frequency signals, this intermediate-freuqncy signal is a simulating signal, and the intermediate-freuqncy signal that receives is converted to digital signal, then digital demodulation signal is become video, audio frequency and data-signal (baseband signal), and by USB interface 21 with demodulation signal be sent to mainboard 5.The vision signal here meets MPEG-4AVC (another name, H264) compression standard, sound signal meets such as technology such as MUSICAM, MPEG4/BSAC and MPEG/Layer2, data-signal meets such as program related data (PAD), non-program related data (NPAD), hiding data channel (TDC), multimedia object transmission (MOT), broadcasting website (BWS), and Internet protocol (IP)-tunnel technology such as (tunning).Because these technology all are well-known, be not described in detail here.
According to another embodiment of the present invention, terrestrial DMB unit 23 can additionally comprise storer 239.Storer 239 is connected to the output terminal of baseband processing unit, and therefore can store therein from the baseband signal (video, audio frequency and data-signal) of baseband processing unit 237 outputs.When demand that replaying appears in requirement in response to the user subsequently, the data slot of being stored is sent to display 4 by mainboard 5 and graphic element, and therefore can be viewed, and can be later on through handling with the fragment that generate other content again.
With reference to Fig. 5, Graphics Processing Unit 3 comprises: graphics engine 331, and it is used for handling more practically all kinds of multi-medium datas that send from mainboard 5; Display engine 333 is used to display 4 that interface is provided, to receive the multi-medium data handled through graphics engine 331 and to send the multi-medium data that receives to display 4; And host interface 335, be used between mainboard 5 and graphics engine 331, providing interface.Because above-mentioned Graphics Processing Unit is general well-known technology, no longer add description here.
The operation of video card of the present invention is described below.
At first, the linkage unit of video card 1 31 inserts the slot of mainboards 5, and therefore keeps and the status of electrically connecting of 5 of mainboards.In addition, the USB interface 21 of terrestrial DMB unit 2 is electrically connected with mainboard 5 by private cable, and display 4 is electrically connected to the connector 35 of graphic element 3.
After the installation of the video card of desk-top computer such as above-mentioned method were finished, when computer power supply was unlocked, the antenna of the terrestrial DMB unit 2 of video card 1 began to receive from the base station ground high-frequency signal.Thereby the signal that receives is converted into intermediate-freuqncy signal and baseband signal in terrestrial DMB unit 23, and is sent to mainboard 5 by USB interface 23 subsequently.Then, the signal that receives is shown by display 4 by graphic element 3 graphical treatment again.And when additional the setting under the situation of storer 239 in terrestrial DMB unit 1, various types of terrestrial broadcasts is stored, and therefore can be replayed later on and watch or use various edit routines to be processed into new content.
Though described embodiments of the invention in detail, as mentioned above, the variations and modifications that are included in the technical spirit scope of the present invention all should be interpreted as comprising in the present invention.
Claims (5)
1. video card, described video card comprises graphic element, described graphic element is responsible for computer graphical and is handled, wherein:
Terrestrial DMB unit and described graphic element that described video card is configured to be used to receive T-DMB (DMB) become one.
2. video card according to claim 1, wherein, described terrestrial DMB unit comprises:
Antenna is used to receive the ground broadcast signal that transmits from ground base station;
USB (universal serial bus) (USB) interface is used for the output signal of described terrestrial DMB unit is sent to computer motherboard, and receives electric power from described mainboard.
3. video card according to claim 1, wherein, described terrestrial DMB unit comprises:
The DMB front-end module, the ground high-frequency signal that is used for receiving from ground base station is converted to intermediate-freuqncy signal;
IF processing unit is used to receive the described intermediate-freuqncy signal that transmits from described DMB front-end module, and eliminates the direct current composition in the intermediate-freuqncy signal that is received; And
Baseband processing unit is used to receive the signal that transmits from described IF processing unit, the conversion of signals that receives is become digital signal, and described digital demodulation signal is become video, audio frequency and data-signal.
4. video card according to claim 3, wherein, described DMB front-end module comprises:
Band-selective filter is used for only leaching the signal with required frequency band; Low noise amplifier is used to amplify the signal through described band-selective filter;
Image-reject filter is used for the signal of picture frequency from described low noise amplifier output leached;
Frequency mixer is used for converting the high-frequency signal from described image-reject filter output to described intermediate-freuqncy signal;
Local oscillator, the local oscillator frequency signal is used to vibrate;
Channel select filter is used for only selecting required channel from the described intermediate-freuqncy signal of described frequency mixer output by bandpass filtering;
Intermediate frequency amplifier is used to amplify the described intermediate-freuqncy signal through described channel select filter.
5. video card according to claim 1, wherein, described graphic element comprises:
Graphics engine is used to finish the graphics process of various computing machines;
Display engine is used for receiving data and showing the data that received from described graphics engine;
Host interface is used to provide the interface between mainboard and the described graphics engine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060058862 | 2006-06-28 | ||
| KR1020060058862A KR100658214B1 (en) | 2006-06-28 | 2006-06-28 | Graphic card haveing a dmb function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101313264A true CN101313264A (en) | 2008-11-26 |
Family
ID=37733493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800002607A Pending CN101313264A (en) | 2006-06-28 | 2007-05-04 | Graphic card haveing a dmb function |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100658214B1 (en) |
| CN (1) | CN101313264A (en) |
| WO (1) | WO2008002011A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378415A (en) * | 2012-04-13 | 2013-10-30 | 索尼电脑娱乐公司 | Electronic device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100600790B1 (en) * | 2003-05-21 | 2006-07-14 | 김종부 | Digital multi media broadcasting receiver having dual broadcasting output function |
| KR100999768B1 (en) * | 2003-09-17 | 2010-12-08 | 엘지전자 주식회사 | Method for managing additional information in digital mutimedia broadcasting receiver |
| KR20050037776A (en) * | 2003-10-20 | 2005-04-25 | 엘지전자 주식회사 | Apparatus for receiving digital broadcasting |
| KR20050081072A (en) * | 2004-02-12 | 2005-08-18 | 엘지전자 주식회사 | Apparatus for store and play control of transport stream data |
| KR100724856B1 (en) * | 2004-03-19 | 2007-06-04 | 삼성전자주식회사 | Apparatus and method for receiving of broadcasting service in a digital multimedia broadcasting system |
-
2006
- 2006-06-28 KR KR1020060058862A patent/KR100658214B1/en not_active IP Right Cessation
-
2007
- 2007-05-04 WO PCT/KR2007/002170 patent/WO2008002011A1/en active Application Filing
- 2007-05-04 CN CNA2007800002607A patent/CN101313264A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378415A (en) * | 2012-04-13 | 2013-10-30 | 索尼电脑娱乐公司 | Electronic device |
| CN103378415B (en) * | 2012-04-13 | 2018-04-13 | 索尼电脑娱乐公司 | Electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008002011A1 (en) | 2008-01-03 |
| KR100658214B1 (en) | 2006-12-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081126 |