CN201409140Y - CMMB device with frequency modulation output function - Google Patents
CMMB device with frequency modulation output function Download PDFInfo
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- CN201409140Y CN201409140Y CN2009203021220U CN200920302122U CN201409140Y CN 201409140 Y CN201409140 Y CN 201409140Y CN 2009203021220 U CN2009203021220 U CN 2009203021220U CN 200920302122 U CN200920302122 U CN 200920302122U CN 201409140 Y CN201409140 Y CN 201409140Y
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Abstract
The utility model discloses a CMMB (China mobile multimedia broadcasting) device with the frequency modulation output function, which aims at solving the problems of low sound volume and bad tone quality existing in the prior CMMB device. The CMMB device with the frequency modulation output function is provided so as to modulate frequency and output the CMMB tone frequency in high sound volume andhigh tone quality on occasions with frequency modulation reception and players, such as a vehicular environment, so that more convenient and high quality listening experience in higher quality can beprovided to a customer. The CMMB device comprises a CMMB decoding module and a frequency modulation output module electrically connected with the CMMB decoding module; further, the CMMB device also comprises a CMMB audio output device; a gating control switch is arranged between the frequency modulation output module and the CMMB audio output device; and the gating control switch is electricallyconnected with the CMMB decoding module.
Description
Technical field
The utility model relates to a kind of CMMB equipment.
Background technology
CMMB is the abbreviation of English ChinaMobileMultimediaBroadcasting (China Mobile multimedia broadcasting).It is the system of first cover of domestic independent research towards multiple portable terminals such as mobile phone, PDA, MP3, MP4, digital camera, notebook computers, utilizes the S-band satellite-signal to realize that " world " one covers, whole nation roaming.
The main feature of CMMB is:
(1) can provide digital broadcast television program, integrated information and urgent broadcast service, realize the seamless collaborative covering that satellite transmits combines with ground network, support public service.
(2) support mobile phone, PDA, MP3, MP4, digital camera, notebook computer and the Miniature Receive Terminal on automobile, train, steamer, aircraft, multimedia services such as receiver, video, audio frequency, data.
(3) adopt the mobile multimedia broadcast television technology with independent intellectual property right, system can run, can safeguard, can manage, and possesses broadcast type, reversible service function, can require progressively expansion according to operation.
(4) support the transportation that central and local governments combine, possess encryption authorization control and management system, support unified standard and unified operation, support the roaming of the user whole nation.
(5) system safety is reliable, has safe precaution ability, is with good expansibility, and can adapt to mobile multimedia broadcast television technology and professional demand for development.
In the present CMMB terminal equipment, be mostly to adopt little loud speaker integrated in its equipment or, provide voice playing by the external microphone device of audio output interface (as earphone or stereo set).CMMB equipment is when vehicle environment uses, and its loudspeaker plays sound is little, can not well satisfy vehicle environment and use.And in other occasion that needs, its loud speaker is also playing sound for a short time, bad because of the less acoustical quality of its speaker unit, uses audio output interface to need external lead wire, has problems such as inconvenient, mobile restricted.
The utility model content
The purpose of this utility model is to solve the problems referred to above that existing CMMB equipment exists, a kind of CMMB equipment with FM output is provided, to have FM reception at vehicle environment etc., to play the occasion of device, frequency modulation is exported the CMMB audio frequency of big volume, high tone quality, provides the sense of hearing more convenient, more high-quality to experience to the user.
The purpose of this utility model realizes by following technical proposals:
A kind of CMMB equipment that has FM output comprises the CMMB decoder module, and has the frequency modulation output module that is electrically connected with the CMMB decoder module.
As an execution mode of the present utility model, described CMMB equipment also comprises the CMMB audio output device, is provided with the gating control switch between described frequency modulation output module and the above-mentioned CMMB audio output device, and this gating control switch is electrically connected with the CMMB decoder module.
An execution mode of the present utility model is that described CMMB audio output device is a loud speaker.
Wider for the ease of frequency modulation output applicability, and need not dispose FM reception equipment more in addition, to utilize existing FM reception and audio output apparatus, the audiorange of described frequency modulation output module output is 78MHz～108MHz.
For the ease of control, the gating control switch is provided with a control end, CMMB audio output device or frequency modulation output module are connected in signal-selectivity ground by control end, be that described gating control switch is for having the switch of four links at least, one of them link is a control end, and three links are electrically connected CMMB audio output device, frequency modulation output module and CMMB decoder module respectively in addition.
In one embodiment, described gating control switch is the electronic switch that transistor constitutes.
For improving versatility of the present utility model and the more high-quality audio frequency of output, described CMMB audio output device is can external earphone or the audio output interface of loud speaker.
Also be provided with frequency in the described frequency modulation output module and select module.
The utility model adopts said structure, in CMMB equipment, be provided with the frequency modulation output module that is electrically connected with the CMMB decoder module, the audio signal input frequency modulation output module that the CMMB decoder module can be solved, export with FM signal again, realize wireless transmission, receive above-mentioned signal by FM reception equipment, be input to again have bigger volume, more in the audio output apparatus of high tone quality, the volume that the audio frequency output of CMMB equipment own exists is little to solve, the problem of lower tone; And, gating control switch by adding in the utility model, can be by the signal of its control end, selectivity is connected CMMB decoder module and audio output device of himself or frequency modulation output module, when the audio signal of CMMB decoder module inserted the frequency modulation output module by the gating control switch, then disconnection was connected with the electrical connection or the signal of CMMB audio output device; Select module by frequency, can select the modulation frequency exported, to avoid possible frequency conflicts.
As seen, adopt the utility model of said structure, compared with prior art, has the function that the audio frequency frequency modulation of CMMB equipment can be exported, be specially adapted to the occasion that has FM reception at vehicle environment etc., play device, frequency modulation is exported the CMMB audio frequency of big volume, high tone quality, provides the sense of hearing more convenient, more high-quality to experience to the user.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is a structural representation of the present utility model.
Embodiment
Below in conjunction with specific embodiments and the drawings the utility model is further described.
Embodiment 1:
The CMMB equipment of present embodiment comprises conventional CMMB receiving chip, and the CMMB decoder module that is electrically connected with the CMMB receiving chip, the CMMB receiving chip can receive the CMMB signal, and passes to the CMMB decoder module and carry out audio frequency and/or video decode, output audio and/or vision signal.
Above-mentioned CMMB equipment also comprises the frequency modulation output module that is electrically connected with the CMMB decoder module, this frequency modulation output module can receive the audio signal of CMMB decoder module output, and export with FM signal, receive by the FM reception equipment that is connected with big volume, high tone quality loud speaker or sound equipment then, CMMB equipment self audio frequency output volume is little to solve, the problem of lower tone, experiences for the hearer with the better sense of hearing.
Embodiment 2:
The CMMB equipment of present embodiment comprises conventional CMMB receiving chip, and the CMMB decoder module that is electrically connected with the CMMB receiving chip, the CMMB receiving chip can receive the CMMB signal, and passes to the CMMB decoder module and carry out audio frequency and/or video decode, output audio and/or vision signal.
As shown in Figure 1, above-mentioned CMMB equipment also comprises the gating control switch that is electrically connected with the CMMB decoder module, this switch has at least four links, one of them link is for receiving the control end of the control signal that the CMMB Control Software sends, three links are electrically connected CMMB audio output device, frequency modulation output module and CMMB decoder module respectively in addition, the contact that wherein connects the CMMB decoder module is a fixed contact, and two links that connect CMMB audio output device, frequency modulation output module are moving contact.
After the gating control switch receives control signal, its fixed contact connects CMMB audio output device or frequency modulation output module according to control signal, can selectivity connect, when connecting CMMB decoder module and CMMB audio output device, the audio signal of CMMB decoder module output is by the CMMB audio output device, as earphone or loud speaker output; When connecting CMMB decoder module and frequency modulation output module, then close the audio signal input path of CMMB audio output device, make it the output of absence of audio signal, audio signal outputs to FM reception equipment (vehicle-mounted fremodyne as shown in fig. 1) by the frequency modulation output module, is input to stereo set (vehicle audio as shown in fig. 1) sounding by FM reception equipment again.
CMMB equipment by said structure, can have FM reception at vehicle environment etc., play the occasion of device, the audio signal of CMMB equipment is input to FM reception, plays device by the frequency modulation pattern, realize the CMMB audio program of the big volume of wireless, convenient broadcast, high tone quality, experience for the hearer with the better sense of hearing.
CMMB audio output device in the present embodiment can be monophony or the boombox that is integrated in the CMMB equipment, also can be audio output interface, lug machine or loud speaker or sound equipment in addition.
Embodiment 3:
The CMMB equipment of present embodiment comprises conventional CMMB receiving chip, and the CMMB decoder module that is electrically connected with the CMMB receiving chip, the CMMB receiving chip can receive the CMMB signal, and passes to the CMMB decoder module and carry out audio frequency and/or video decode, output audio and/or vision signal.
As shown in Figure 1, above-mentioned CMMB equipment also comprises the gating control switch that is electrically connected with the CMMB decoder module, this switch has at least four links, one of them link is for receiving the control end of the control signal that the CMMB Control Software sends, and three links are electrically connected CMMB audio output device, frequency modulation output module and CMMB decoder module respectively in addition.
Gating control switch in the present embodiment is the electronic switch that transistor constitutes, and connects to realize contactless selectivity.
In the present embodiment, the frequency modulation output module also comprises frequency selection module.
During operation,,, and disconnect, realize that selectivity connects with the CMMB audio output device so that CMMB decoder module and frequency modulation output module connect by the program in the CMMB equipment or software control end input control signal to the gating control switch.
Frequency in the frequency modulation output module is selected module, includes frequency selection key or functional module, so that the user can select the modulation frequency exported, avoids possible frequency conflicts.
The audio signal that the CMMB decoder module solves is input to the frequency modulation output module, with selected frequency frequency modulation output, receive to play by FM reception, broadcast device again, as shown in Figure 1, receive by vehicle-mounted fremodyne, pass to vehicle audio again and play, realize the CMMB audio frequency output of big volume, high tone quality, give the hearer so that more high-quality, the sense of hearing are more easily experienced.
In the various embodiments described above, wider for the ease of frequency modulation output applicability, and need not dispose FM reception equipment more in addition, to utilize existing FM reception and audio output apparatus, the audiorange of described frequency modulation output module output is 78MHz～108MHz.
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (9)
1. a CMMB equipment that has FM output comprises the CMMB decoder module, it is characterized in that, also comprises with the CMMB decoder module having the frequency modulation output module that is electrically connected.
2. a kind of according to claim 1 CMMB equipment that has FM output, it is characterized in that, described CMMB equipment also comprises the CMMB audio output device, be provided with the gating control switch between described frequency modulation output module and the above-mentioned CMMB audio output device, this gating control switch is electrically connected with the CMMB decoder module.
3. as a kind of CMMB equipment that has FM output as described in the claim 2, it is characterized in that described CMMB audio output device is a loud speaker.
4. as a kind of CMMB equipment that has FM output as described in claim 2 or 3, it is characterized in that the audiorange of described frequency modulation output module output is 78MHz～108MHz.
5. as a kind of CMMB equipment that has FM output as described in claim 2 or 3, it is characterized in that, described gating control switch is for having the switch of four links at least, one of them link is a control end, and three links are electrically connected CMMB audio output device, frequency modulation output module and CMMB decoder module respectively in addition.
6. as a kind of CMMB equipment that has FM output as described in the claim 5, it is characterized in that described gating control switch is the electronic switch that transistor constitutes.
7. as a kind of CMMB equipment that has FM output as described in the claim 2, it is characterized in that described CMMB audio output device is can external earphone or the audio output interface of loud speaker.
8. as a kind of CMMB equipment that has FM output as described in the claim 6, it is characterized in that the audiorange of described frequency modulation output module output is 78MHz～108MHz.
9. as a kind of CMMB equipment that has FM output as described in claim 1 or 2 or 3, it is characterized in that, also be provided with frequency in the described frequency modulation output module and select module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203021220U CN201409140Y (en) | 2009-04-13 | 2009-04-13 | CMMB device with frequency modulation output function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203021220U CN201409140Y (en) | 2009-04-13 | 2009-04-13 | CMMB device with frequency modulation output function |
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| CN201409140Y true CN201409140Y (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009203021220U Expired - Fee Related CN201409140Y (en) | 2009-04-13 | 2009-04-13 | CMMB device with frequency modulation output function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018019117A1 (en) * | 2016-07-29 | 2018-02-01 | 深圳创维数字技术有限公司 | Set-top box |
-
2009
- 2009-04-13 CN CN2009203021220U patent/CN201409140Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018019117A1 (en) * | 2016-07-29 | 2018-02-01 | 深圳创维数字技术有限公司 | Set-top box |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100217 Termination date: 20170413 |