CN201188658Y - Vehicle-mounted digital television receiver - Google Patents
Vehicle-mounted digital television receiver Download PDFInfo
- Publication number
- CN201188658Y CN201188658Y CNU2008203003425U CN200820300342U CN201188658Y CN 201188658 Y CN201188658 Y CN 201188658Y CN U2008203003425 U CNU2008203003425 U CN U2008203003425U CN 200820300342 U CN200820300342 U CN 200820300342U CN 201188658 Y CN201188658 Y CN 201188658Y
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- CN
- China
- Prior art keywords
- digital television
- frequency modulation
- television receiver
- vehicle
- car
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
The utility model relates to a digital television receiver, in particular to an accompanying sound receiving technology of an in-car digital television receiver. Aiming at the defect that the television accompanying sound frequency modulation transmit signal in the prior art can not be adjusted according to needs, the utility model discloses a digital television receiver with an adjustable frequency modulation transmit signal, which has the technical proposal as follows: the in-car digital television receiver comprises an audio processing circuit and a controller, and is characterized in that a frequency modulation transmitting apparatus is also included, and the frequency modulation transmitting apparatus is connected with the audio processing circuit; the frequency modulation transmitting apparatus is provided with a transmitting control port which is connected with a processor. The utility model is used for the in-car digital television receiver, which can realize the television accompanying sound aural reception under the condition that a car runs at high speed and heavy noise, and does not need to refit the sound system of the car.
Description
Technical field
The utility model relates to digital television receiver, particularly the sound accompaniment reception technique of vehicle-mounted digital television receiver.
Background technology
At present, along with starting broadcasting of surface wave Digital Television, the digital television program content is more and more abundanter, and the user that the vehicle-mounted digital television receiver that can watch digital television program is installed on automobile is more and more.But because vehicle-mounted digital television receiver screen is generally little, its power of loudspeaker that carries is limited, automobilism particularly during high-speed cruising noise very big, can not guarantee audibility.
Chinese patent notification number CN2475625Y, February 6 2002 day for announcing, name is called " vehicle-mounted frequency modulation emission television set and audio signal reception device " and discloses a kind of frequency modulation emission television set and audio signal reception device, television field frame is modulated on the fixing frequency, carry out wireless transmission, the passenger listens to television field frame by the frequency modulation earphone.The weak point of this television field frame system is:
1, frequency modulation emission frequency can not be continuously, adjustment arbitrarily, the scope of application is restricted.In all parts of the country all have a local FM broadcasting, and frequency also has nothing in common with each other, the frequency of in-car TV frequency modulation emission as can not be continuously, adjustment arbitrarily, the signal that makes emission may be subjected to the interference of local FM broadcasting, influence the audibility of television field frame.
2, can not exchange the sound accompaniment amplitude of penetrating that takes place frequently adjusts according to the use needs.
3, can not exchange the frequency emitted power according to using needs to adjust.
The utility model content
Technical problem to be solved in the utility model, the shortcoming that transmits and can not adjust as required at the TV sound FM of prior art exactly provides a kind of frequency modulation adjustable digital television receiver that transmits.
The utility model solve the technical problem, and the technical scheme of employing is, the vehicle-mounted digital television receiver comprises audio frequency processing circuit and controller, it is characterized in that, also comprises the frequency modulation emitter, and described frequency modulation emitter is connected with audio frequency processing circuit; Described frequency modulation emitter has the emission control port, and described emission control port is connected with processor.
The beneficial effects of the utility model are, have solved automobile vehicle-mounted digital television sound accompaniment under the big situation of high-speed cruising, noise and have listened to problem, do not need vehicle audio system is reequiped.Because the frequency of frequency modulation emission, power etc. can be regulated, and can avoid the interference of local FM broadcasting, also can the FM broadcasting program of locality not exerted an influence.By exchanging the adjustment of take place frequently frequency, sound accompaniment amplitude and the transmitting power of penetrating, can satisfy the listening quality requirement to greatest extent.
Description of drawings
Fig. 1 is a vehicle-mounted digital television receiver structure schematic diagram;
Fig. 2 frequency modulation emitter control flow chart.
Embodiment
Describe the technical solution of the utility model in detail below in conjunction with accompanying drawing
Vehicle-mounted digital television receiver of the present utility model as shown in Figure 1, comprise that Digital Television receives and decoding processing circuit 101, image and demonstration treatment circuit 102, display screen 103, audio frequency processing circuit 104, loud speaker 105, controller 106, integrated circuit (IC) chip 107, transmitting antenna 108, power supply 109, button and remote-control receiving circuit 110 etc.
Digital Television reception and decoding circuit 101 are finished reception, demodulation and the decoding of digital television signal, produce image and audio signal, this circuit can compatiblely receive U.S. ATSC, European DVB-T/H/S/S2, Japanese ISDB-T, Korea S T-DMB, Chinese DTMB (standard No. GB206002006)/one or more digital television signals such as DMB-TH/CMMB.Image and demonstration treatment circuit 102 receive picture signals, finish image and show processing, send into display screen 103 and show.Audio frequency processing circuit 104 received audio signals are sent into loud speaker 105 and integrated circuit (IC) chip 107 after the processing.Integrated circuit (IC) chip 107 receives the I of controller 106
2The C control signal, the small-power frequency modulation that controlled back produces characteristic frequency transmits, and sends into transmitting antenna 108, and transmitting antenna 108 is closely launched.Controller 106 passes through I
2The mode of C bus control effectively to the each several part circuit, and the emission frequency of integrated circuit (IC) chip 107 can be adjusted so that the step-length of 0.1MHz or its integral multiple is continuous, any, satisfies the needs that vehicle-mounted digital television carries out the frequency modulation emission anywhere.Controller passes through I
2The C bus also can be exchanged the sound accompaniment amplitude and the transmitting power of penetrating that take place frequently and be adjusted.Power supply 109 provides required voltage and electric current for the receiver each several part.Button and remote-control receiving circuit 110 receive user's instruction, and send into controller 106 and finish various controls and processing.Integrated circuit (IC) chip 107 can be selected for use has I
2The monolithic integrated circuit of C bus control port can reduce cost and simplifies debugging step.Preferably the BH14xx series of products with TOY are good, as BH1411, BH1425 etc.
In China, the frequency range of FM broadcasting is 88MHz-108MHz, and frequency interval is 0.1MHz, all can adapt in this scope.By the change parameter, also can adapt to the needs of FM broadcasting such as Japan, Europe, the U.S..
Fig. 2 is the software module workflow diagram of the utility model control frequency modulation emission, and its concrete steps are:
Claims (4)
1. the vehicle-mounted digital television receiver comprises audio frequency processing circuit and controller, it is characterized in that, also comprises the frequency modulation emitter, and described frequency modulation emitter is connected with audio frequency processing circuit; Described frequency modulation emitter has the emission control port, and described emission control port is connected with processor.
2. vehicle-mounted digital television receiver according to claim 1 is characterized in that, described emission control port is I
2The C bus port.
3. vehicle-mounted digital television receiver according to claim 1 and 2 is characterized in that, described frequency modulation emitter comprises integrated circuit (IC) chip and transmitting antenna.
4. vehicle-mounted digital television receiver according to claim 3 is characterized in that, described integrated circuit (IC) chip model is BH1411.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203003425U CN201188658Y (en) | 2008-03-12 | 2008-03-12 | Vehicle-mounted digital television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203003425U CN201188658Y (en) | 2008-03-12 | 2008-03-12 | Vehicle-mounted digital television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201188658Y true CN201188658Y (en) | 2009-01-28 |
Family
ID=40311679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008203003425U Expired - Fee Related CN201188658Y (en) | 2008-03-12 | 2008-03-12 | Vehicle-mounted digital television receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201188658Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410888A (en) * | 2014-12-11 | 2015-03-11 | 成都新光微波工程有限责任公司 | Vehicle-mounted digital television receiver |
-
2008
- 2008-03-12 CN CNU2008203003425U patent/CN201188658Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410888A (en) * | 2014-12-11 | 2015-03-11 | 成都新光微波工程有限责任公司 | Vehicle-mounted digital television receiver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090128 Termination date: 20160312 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |