CN201315594Y - Receiving device, receiving card and receiving terminal of China mobile multimedia broadcasting - Google Patents
Receiving device, receiving card and receiving terminal of China mobile multimedia broadcasting Download PDFInfo
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- CN201315594Y CN201315594Y CNU2008201097589U CN200820109758U CN201315594Y CN 201315594 Y CN201315594 Y CN 201315594Y CN U2008201097589 U CNU2008201097589 U CN U2008201097589U CN 200820109758 U CN200820109758 U CN 200820109758U CN 201315594 Y CN201315594 Y CN 201315594Y
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Abstract
The utility model discloses a receiving device, a receiving card and a receiving terminal of a China mobile multimedia broadcasting (CMMB), which comprises a radio frequency signal receiving and converting part and a CMMB receiving part, wherein a radio frequency signal receiving and converting unit receives a radio frequency signal from an antenna, and amplifies, filters and converts the received radio frequency signal into a base band signal; and a CMMB signal receiving unit receives the base band signal of the radio frequency signal receiving and converting unit, processes the received base band signal to obtain a CMMB audio-video stream and outputs the CMMB audio-video stream. The utility model ensures that the receiving card has the CMMB signal receiving function by integrating the CMMB signal receiving function in the receiving card, is convenient for users, shortens the development cycle of the receiving terminal, and saves the investment.
Description
Technical field
The utility model relates to China mobile multi-media broadcasting technology, refers to a kind of mobile multimedia broadcast receiving apparatus, receiving card and receiving terminal especially.
Background technology
China Mobile multimedia broadcasting technology alliance abbreviates China Mobile multimedia broadcasting (CMMB as, China Mobile Multimedia Broadcasting), it is intended to develop multimedia reception technique and the equipment that is fit to move application as the technical system of serving China Mobile multimedia broadcasting.
In order to receive the CMMB signal, need configuration corresponding C MMB receiving equipment.The operation principle of CMMB receiving equipment is roughly: the analog signal that receives is carried out obtaining digital signal after mould/number conversion, digital signal is handled through channel synchronization, detect and extract CMMB signal wherein, and the CMMB signal that extracts is carried out obtaining meeting after the demodulation CMMB audio/video flow of CMMB standard.
Usually, the CMMB signal receiver can use on receiving terminal, so that receiving terminal can receive mobile multimedia data stream, described receiving terminal can be a portable terminal, also can be fixed terminal.And in order to increase the CMMB receiving function in receiving terminal, except needs were provided with the CMMB receiving equipment on receiving terminal, receiving terminal producer for example cell phone manufacturer also will increase corresponding hardware module and software processes.
At hardware aspect, increase some peripheral circuits such as radiofrequency signal and receive and conversion module, be used for small radiofrequency signal amplification, filtering, and after being converted to baseband signal, send to the CMMB signal receiver; Baseband signal can analog baseband signal, as analogue zero intermediate frequency or Low Medium Frequency signal or analog I signal, also can be digital baseband signal, as digital Low Medium Frequency signal, and perhaps digital zero intermediate-freuqncy signal, perhaps digital baseband IQ signal.
Aspect software, because the interface that the CMMB signal receiver provides is determined by different manufacturers, there is not unified standard, therefore, mobile device producer generally all needs the CMMB audio/video flow that meets the CMMB standard with CMMB receiving equipment output to be converted to the CMMB audio/video flow of the interface protocol of self supporting after send to the processing unit of receiving terminal by interface, just can complete successfully the reception of CMMB signal.
At present, to the use of CMMB signal receiver, concerning user such as receiving terminal producer, in order in receiving terminal, to support the CMMB receiving function, need provide technical support aspect the software and hardware two, bring the increase receiving terminal construction cycle undoubtedly, increase problems such as investment.
The utility model content
In view of this, main purpose of the present utility model is to provide a kind of mobile multimedia broadcast receiving apparatus, can realize the support to the CMMB receiving function easily.
Another purpose of the present utility model is to provide a kind of receiving card that receives Mobile Multimedia Broadcasting, can realize the support to the CMMB receiving function easily.
Another purpose of the present utility model is to provide a kind of receiving terminal, can support the CMMB receiving function, and need not the extra software and hardware technology support of receiving terminal producer increase, has shortened the receiving terminal construction cycle, has saved investment.
For achieving the above object, the technical solution of the utility model specifically is achieved in that
A kind of mobile multimedia broadcast receiving apparatus comprises radiofrequency signal reception and converting unit and CMMB signal receiving unit; Wherein,
Radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to baseband signal;
The CMMB signal receiving unit receives from radiofrequency signal and receives baseband signal with converting unit, exports after obtaining meeting the CMMB audio/video flow of CMMB standard after the baseband signal that receives is handled.
Described CMMB signal receiving unit, the CMMB audio/video flow that will meet the CMMB standard are converted to output again behind the CMMB audio/video flow of the interface protocol that meets interface unit.
Described radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to digital baseband signal; Described CMMB signal receiving unit comprises channel synchronization module, demodulation module and protocol conversion module, wherein,
The signal Synchronization module receives from the baseband signal of radiofrequency signal reception with converting unit, and the baseband signal that receives is detected and extract the CMMB signal;
Demodulation module receives the CMMB signal from the signal Synchronization module, and the CMMB signal that receives is carried out obtaining meeting after the demodulation CMMB audio/video flow of CMMB standard;
Protocol conversion module, the CMMB audio/video flow that will meet the CMMB standard is converted to the CMMB audio/video flow of the interface protocol that meets interface module, and exports to the processing unit of receiving terminal via described interface unit.
Described radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to analog baseband signal;
Described CMMB signal receiving unit also comprises mould/number conversion module, receives from the analog baseband signal of radiofrequency signal reception with converting unit, is converted to digital baseband signal and exports to described signal Synchronization module.
Described radiofrequency signal receives with converting unit and adopts wired or wireless reception.
Described radiofrequency signal receives with converting unit and adopts wireless receiving, and antenna is arranged on the mobile multimedia broadcast receiving apparatus, perhaps utilizes the existing antenna of the applied receiving terminal of mobile multimedia broadcast receiving apparatus itself.
A kind of reception mobile multimedia broadcast receiving card comprises radiofrequency signal reception and converting unit, CMMB signal receiving unit and interface unit; Wherein,
Radiofrequency signal receives and converting unit, be used to receive from the radiofrequency signal of antenna amplify,, with the radiofrequency signal filtering that receives, and be converted to baseband signal;
The CMMB signal receiving unit, reception is from the baseband signal of radiofrequency signal reception with converting unit, obtain meeting the CMMB audio/video flow of CMMB standard after the baseband signal that receives handled, and be converted into the CMMB audio/video flow of the interface protocol that meets interface unit;
Interface unit, the CMMB audio/video flow that will meet the interface protocol of self is exported to the processing unit of receiving terminal.
Described radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to digital baseband signal; Described CMMB signal receiving unit comprises channel synchronization module, demodulation module and protocol conversion module, wherein,
The signal Synchronization module receives from the baseband signal of radiofrequency signal reception with converting unit, and the baseband signal that receives is detected and extract the CMMB signal;
Demodulation module receives the CMMB signal from the signal Synchronization module, and the CMMB signal that receives is carried out obtaining meeting after the demodulation CMMB audio/video flow of CMMB standard;
Protocol conversion module, the CMMB audio/video flow that will meet the CMMB standard is converted to the CMMB audio/video flow of the interface protocol that meets interface module, and exports to the processing unit of receiving terminal via described interface unit.
Described radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to analog baseband signal;
Described CMMB signal receiving unit also comprises mould/number conversion module, and the analog baseband signal that receives from radiofrequency signal reception and converting unit is converted to digital baseband signal, and exports to described signal Synchronization module.
Described interface unit is the MMIS interface module, perhaps SPI interface module, perhaps SDIO interface module, perhaps SPI interface module and SDIO interface.
Described radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and be converted to analog baseband signal, analog baseband signal is simulation Low Medium Frequency signal, perhaps analogue zero intermediate-freuqncy signal, perhaps analog I signal;
Perhaps, radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and being converted to digital baseband signal, digital baseband signal is digital Low Medium Frequency signal or digital zero intermediate-freuqncy signal or digital baseband IQ signal.
Described radiofrequency signal receives with converting unit and adopts wired or wireless reception.
Described radiofrequency signal receives with converting unit and adopts wireless receiving, and antenna is arranged on the receiving card, perhaps utilizes the existing antenna of the applied receiving terminal of receiving card itself.
Described receiving card is mini secure data storage card Mini SD or miniature secure data storage card MicroSD, wireless Internet card.
A kind of mobile multimedia broadcast receiving terminal comprises receiving card at least, and described receiving card comprises radiofrequency signal reception and converting unit, CMMB signal receiving unit and interface unit; Wherein,
Radiofrequency signal receives and converting unit, receive from the radiofrequency signal of antenna amplify,, with the radiofrequency signal filtering that receives, and be converted to baseband signal;
The CMMB signal receiving unit, reception is from the baseband signal of radiofrequency signal reception with converting unit, obtain meeting the CMMB audio/video flow of CMMB standard after the baseband signal that receives handled, and be converted into the CMMB audio/video flow of the interface protocol that meets interface unit;
Interface unit, the CMMB audio/video flow that will meet the interface protocol of self is exported to the processing unit of receiving terminal.
Described radiofrequency signal receives and converting unit, receives the radiofrequency signal that connects from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to digital baseband signal; Described CMMB signal receiving unit comprises channel synchronization module, demodulation module and protocol conversion module, wherein,
The signal Synchronization module receives from the baseband signal of radiofrequency signal reception with converting unit, and the baseband signal that receives is detected and extract the CMMB signal;
Demodulation module receives the CMMB signal from the signal Synchronization module, and the CMMB signal that receives is carried out obtaining meeting after the demodulation CMMB audio/video flow of CMMB standard;
Protocol conversion module, the CMMB audio/video flow that will meet the CMMB standard is converted to the CMMB audio/video flow of the interface protocol that meets interface module, and exports to the processing unit of receiving terminal via described interface unit.
Described radiofrequency signal receives and converting unit, receives the radiofrequency signal that connects from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to analog baseband signal;
Described CMMB signal receiving unit also comprises mould/number conversion module, and the analog baseband signal that receives from radiofrequency signal reception and converting unit is converted to digital baseband signal, and exports to described signal Synchronization module.
Described receiving terminal is notebook computer, mobile phone, MP4, digital camera, digital camera, digital camera, GPS navigation device, vehicle multimedia system, have the earphone of controlled function, have the earphone of Bluetooth function.
As seen from the above technical solution, the mobile multimedia broadcast receiving apparatus that the utility model provides comprises that radiofrequency signal receives and conversion, and CMMB reception two parts, and need not the user increases hardware designs, just can realize the support to the CMMB receiving function easily.The utility model is by being provided with the CMMB receiving function in receiving card, make receiving card have the CMMB signal receiving function, the user only needs as using receiving card at ordinary times, receiving card is inserted receiving terminal, just can realize support easily, receive the CMMB digital television signal the CMMB receiving function.And, do not need to increase extra software and hardware technology support for receiving terminal producer, and shortened the receiving terminal construction cycle, saved investment.
Description of drawings
Fig. 1 is the composition structural representation of the utility model mobile multimedia broadcast receiving apparatus;
Fig. 2 is the composition structural representation of the utility model receiving card;
Fig. 3 is the composition structural representation of the utility model CMMB signal receiving unit.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.
Fig. 1 is the composition structural representation of the utility model mobile multimedia broadcast receiving apparatus, and as shown in Figure 1, this device comprises radiofrequency signal reception and converting unit and CMMB signal receiving unit, wherein,
Radiofrequency signal reception and converting unit, the small radiofrequency signal that is used for receiving by antenna is amplified, filtering, and is converted to baseband signal.Baseband signal can analog baseband signal, as analogue zero intermediate frequency or Low Medium Frequency signal or analog I signal, also can be digital baseband signal, as digital Low Medium Frequency signal, and perhaps digital zero intermediate-freuqncy signal, perhaps digital baseband IQ signal.
Need to prove that antenna can be that an antenna is set on the mobile multimedia broadcast receiving apparatus card, also can utilize the existing antenna of the applied receiving terminal of mobile multimedia broadcast receiving apparatus itself.Setting about antenna belongs to those skilled in the art's conventional techniques means, repeats no more here.
Radiofrequency signal receives and the specific implementation of converting unit belongs to prior art, also no longer describes in detail here.
The CMMB signal receiving unit obtains meeting the CMMB audio/video flow of CMMB standard after being used for the baseband signal that receives handled, and exports after being converted into the CMMB audio/video flow of supporting one or more interface protocols.Interface protocol can be SDIO agreement, MMIS agreement, SPI agreement etc.
Need to prove, the CMMB signal receiving unit also can only be exported the CMMB audio/video flow that meets the CMMB standard, like this, using the utility model mobile multimedia broadcast receiving apparatus, only the CMMB audio/video flow that needs the user will meet the CMMB standard is converted to the CMMB audio/video flow that meets the interface protocol that the user self supported and gets final product.
At present, the receiving card that much can use is arranged on the market in receiving terminal, such as: mini secure data storage card (Mini SD), miniature secure data storage card smart cards such as (Micro SD), or wireless Internet card.Receiving terminal can include but not limited to that notebook computer, mobile phone, MP4, digital camera, digital camera, digital camera, GPS navigation device, vehicle multimedia system, the earphone with controlled function, radio receiving terminal are as earphone with Bluetooth function etc.
Wherein, Mini SD has application widely in receiving terminal.Because its volume is little, compatible good, increasing receiving terminal is selected the carrier of Mini SD card as product.
Fig. 2 is the composition structural representation of the utility model receiving card, only shows among Fig. 1 and supports the unit that the CMMB function is relevant and the interface unit of receiving card, and other unit of receiving card itself such as memory cell etc. are not shown in Figure 1.As shown in Figure 1, the utility model receiving card comprises that radiofrequency signal receives and converting unit, CMMB signal receiving unit and interface unit, wherein,
Radiofrequency signal reception and converting unit, the small radiofrequency signal that is used for receiving by antenna is amplified, filtering, and is converted to baseband signal.Baseband signal can analog baseband signal, as analogue zero intermediate frequency or Low Medium Frequency signal or analog I signal, also can be digital baseband signal, as digital Low Medium Frequency signal, and perhaps digital zero intermediate-freuqncy signal, perhaps digital baseband IQ signal.
Need to prove that antenna can be that an antenna is set on receiving card, also can utilize the existing antenna of the applied receiving terminal of receiving card itself.Setting about antenna belongs to those skilled in the art's conventional techniques means, repeats no more here.
Radiofrequency signal receives and the specific implementation of converting unit belongs to prior art, also no longer describes in detail here.
The CMMB signal receiving unit, obtain meeting the CMMB audio/video flow of CMMB standard after being used for the baseband signal that receives handled, and be converted into the CMMB audio/video flow of the interface protocol that meets interface unit after interface unit sends to the processing unit of receiving terminal.
Such as interface unit is the SDIO interface unit, and the CMMB signal receiving unit need be converted to the CMMB audio/video flow CMMB audio/video flow that meets the SDIO agreement;
Such as interface unit is mobile multimedia interface (MMIS, Mobile media interface service) unit, and the CMMB signal receiving unit need be converted to the CMMB audio/video flow CMMB audio/video flow that meets the MMIS agreement;
Such as interface unit is serial protocol interface (SPI, Serial protocol interface) unit, and the CMMB signal receiving unit need be converted to the CMMB audio/video flow CMMB audio/video flow that meets the SPI agreement.
From the utility model scheme as seen, because receiving card has the CMMB signal receiving function, the user only needs as using receiving card at ordinary times receiving card to be inserted receiving terminal, just can realize support easily, receive the CMMB digital television signal the CMMB receiving function.And, do not need to increase extra software and hardware technology support for receiving terminal producer, and shortened the receiving terminal construction cycle, saved investment.
Fig. 3 is the composition structural representation of the utility model CMMB signal receiving unit, as shown in Figure 2, if radiofrequency signal reception and converting unit output is digital baseband signal, the CMMB signal receiving unit can comprise channel synchronization module, demodulation module and protocol conversion module, wherein
The signal Synchronization module is used to receive digital baseband signal, detects and extract the CMMB signal.
Demodulation module is used for the CMMB signal that extracts is carried out obtaining meeting after the demodulation CMMB audio/video flow of CMMB standard.
Protocol conversion module, the CMMB audio/video flow that is used for meeting the CMMB standard is converted to the CMMB audio/video flow of the interface protocol that meets interface module, and sends to the processing unit of receiving terminal via interface unit.
Interface unit can comprise the MMIS interface module, perhaps SPI interface module, perhaps SDIO interface module, perhaps SPI interface module and SDIO interface etc.
In addition, between protocol conversion module and interface unit, cache module can be set further.
If what radiofrequency signal received and converting unit is exported is analog baseband signal, so, the CMMB signal receiving unit also comprises mould/number conversion module, and the analog baseband signal that is used for receiving is converted to digital baseband signal, and sends to described signal Synchronization module.
The above is preferred embodiment of the present utility model only, is not to be used to limit protection range of the present utility model.All within spirit of the present utility model and principle, any modification of being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (18)
1. a mobile multimedia broadcast receiving apparatus is characterized in that, comprises radiofrequency signal reception and converting unit and Mobile Multimedia Broadcasting CMMB signal receiving unit; Wherein,
Radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to baseband signal;
The CMMB signal receiving unit receives from radiofrequency signal and receives baseband signal with converting unit, exports after obtaining meeting the CMMB audio/video flow of CMMB standard after the baseband signal that receives is handled.
2. mobile multimedia broadcast receiving apparatus according to claim 1 is characterized in that, described CMMB signal receiving unit, the CMMB audio/video flow that will meet the CMMB standard are converted to output again behind the CMMB audio/video flow of the interface protocol that meets interface unit.
3. mobile multimedia broadcast receiving apparatus according to claim 1 and 2 is characterized in that, described radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to digital baseband signal; Described CMMB signal receiving unit comprises channel synchronization module, demodulation module and protocol conversion module, wherein,
The signal Synchronization module receives from the baseband signal of radiofrequency signal reception with converting unit, and the baseband signal that receives is detected and extract the CMMB signal;
Demodulation module receives the CMMB signal from the signal Synchronization module, and the CMMB signal that receives is carried out obtaining meeting after the demodulation CMMB audio/video flow of CMMB standard;
Protocol conversion module, the CMMB audio/video flow that will meet the CMMB standard is converted to the CMMB audio/video flow of the interface protocol that meets interface module, and exports to the processing unit of receiving terminal via described interface unit.
4. mobile multimedia broadcast receiving apparatus according to claim 3 is characterized in that, described radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to analog baseband signal;
Described CMMB signal receiving unit also comprises mould/number conversion module, receives from the analog baseband signal of radiofrequency signal reception with converting unit, is converted to digital baseband signal and exports to described signal Synchronization module.
5. mobile multimedia broadcast receiving apparatus according to claim 1 is characterized in that, described radiofrequency signal receives with converting unit and adopts wired or wireless reception.
6. mobile multimedia broadcast receiving apparatus according to claim 5, it is characterized in that, described radiofrequency signal receives with converting unit and adopts wireless receiving, antenna is arranged on the mobile multimedia broadcast receiving apparatus, perhaps utilizes the existing antenna of the applied receiving terminal of mobile multimedia broadcast receiving apparatus itself.
7. a receiving card that receives Mobile Multimedia Broadcasting is characterized in that, comprises radiofrequency signal reception and converting unit, Mobile Multimedia Broadcasting CMMB signal receiving unit and interface unit; Wherein,
Radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to baseband signal;
The CMMB signal receiving unit, reception is from the baseband signal of radiofrequency signal reception with converting unit, obtain meeting the CMMB audio/video flow of CMMB standard after the baseband signal that receives handled, and be converted into the CMMB audio/video flow of the interface protocol that meets interface unit;
Interface unit, the CMMB audio/video flow that will meet the interface protocol of self is exported to the processing unit of receiving terminal.
8. receiving card according to claim 7 is characterized in that, described radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to digital baseband signal; Described CMMB signal receiving unit comprises channel synchronization module, demodulation module and protocol conversion module, wherein,
The signal Synchronization module receives from the baseband signal of radiofrequency signal reception with converting unit, and the baseband signal that receives is detected and extract the CMMB signal;
Demodulation module receives the CMMB signal from the signal Synchronization module, and the CMMB signal that receives is carried out obtaining meeting after the demodulation CMMB audio/video flow of CMMB standard;
Protocol conversion module, the CMMB audio/video flow that will meet the CMMB standard is converted to the CMMB audio/video flow of the interface protocol that meets interface module, and exports to the processing unit of receiving terminal via described interface unit.
9. receiving card according to claim 8 is characterized in that, described radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to analog baseband signal;
Described CMMB signal receiving unit also comprises mould/number conversion module, and the analog baseband signal that receives from radiofrequency signal reception and converting unit is converted to digital baseband signal, and exports to described signal Synchronization module.
10. receiving card according to claim 8 is characterized in that, described interface unit is the MMIS interface module, perhaps SPI interface module, perhaps SDI0 interface module, perhaps SPI interface module and SDI0 interface.
11. receiving card according to claim 7, it is characterized in that, described radiofrequency signal receives and converting unit, reception is from the radiofrequency signal of antenna, with radiofrequency signal amplification, the filtering that receives, and be converted to analog baseband signal, analog baseband signal is simulation Low Medium Frequency signal, perhaps analogue zero intermediate-freuqncy signal, perhaps analog I signal;
Perhaps, radiofrequency signal receives and converting unit, receives the radiofrequency signal from antenna, with radiofrequency signal amplification, the filtering that receives, and being converted to digital baseband signal, digital baseband signal is digital Low Medium Frequency signal or digital zero intermediate-freuqncy signal or digital baseband IQ signal.
12. receiving card according to claim 7 is characterized in that, described radiofrequency signal receives with converting unit and adopts wired or wireless reception.
13. receiving card according to claim 12 is characterized in that, described radiofrequency signal receives with converting unit and adopts wireless receiving, and antenna is arranged on the receiving card, perhaps utilizes the existing antenna of the applied receiving terminal of receiving card itself.
14., it is characterized in that described receiving card is mini secure data storage card Mini SD or miniature secure data storage card Micro SD, wireless Internet card according to each described receiving card of claim 7～13.
15. a mobile multimedia broadcast receiving terminal is characterized in that, comprises receiving card at least, described receiving card comprises radiofrequency signal reception and converting unit, CMMB signal receiving unit and interface unit; Wherein,
Radiofrequency signal receives and converting unit, receives the radiofrequency signal that connects from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to baseband signal;
The CMMB signal receiving unit, reception is from the baseband signal of radiofrequency signal reception with converting unit, obtain meeting the CMMB audio/video flow of CMMB standard after the baseband signal that receives handled, and be converted into the CMMB audio/video flow of the interface protocol that meets interface unit;
Interface unit, the CMMB audio/video flow that will meet the interface protocol of self is exported to the processing unit of receiving terminal.
16. receiving terminal according to claim 15 is characterized in that, described radiofrequency signal receives and converting unit, receives the radiofrequency signal that connects from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to digital baseband signal; Described CMMB signal receiving unit comprises channel synchronization module, demodulation module and protocol conversion module, wherein,
The signal Synchronization module receives from the baseband signal of radiofrequency signal reception with converting unit, and the baseband signal that receives is detected and extract the CMMB signal;
Demodulation module receives the CMMB signal from the signal Synchronization module, and the CMMB signal that receives is carried out obtaining meeting after the demodulation CMMB audio/video flow of CMMB standard;
Protocol conversion module, the CMMB audio/video flow that will meet the CMMB standard is converted to the CMMB audio/video flow of the interface protocol that meets interface module, and exports to the processing unit of receiving terminal via described interface unit.
17. receiving terminal according to claim 16 is characterized in that, described radiofrequency signal receives and converting unit, receives the radiofrequency signal that connects from antenna, with radiofrequency signal amplification, the filtering that receives, and is converted to analog baseband signal;
Described CMMB signal receiving unit also comprises mould/number conversion module, and the analog baseband signal that receives from radiofrequency signal reception and converting unit is converted to digital baseband signal, and exports to described signal Synchronization module.
18. according to each described receiving terminal of claim 15～17, it is characterized in that described receiving terminal is notebook computer, mobile phone, MP4, digital camera, digital camera, digital camera, GPS navigation device, vehicle multimedia system, have the earphone of controlled function, have the earphone of Bluetooth function.
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| CNU2008201097589U CN201315594Y (en) | 2008-08-07 | 2008-08-07 | Receiving device, receiving card and receiving terminal of China mobile multimedia broadcasting |
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| CNU2008201097589U CN201315594Y (en) | 2008-08-07 | 2008-08-07 | Receiving device, receiving card and receiving terminal of China mobile multimedia broadcasting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106506029A (en) * | 2016-11-07 | 2017-03-15 | 中山大学 | A kind of u piece of digital wireless audio transmission system and its transmission method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106506029A (en) * | 2016-11-07 | 2017-03-15 | 中山大学 | A kind of u piece of digital wireless audio transmission system and its transmission method |
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Effective date of registration: 20150929 Address after: 100080, Beijing, Zhongguancun Haidian District Street 11, 100 million world wealth center, block A, 12 Patentee after: BEIJING BOXIN SHITONG TECHNOLOGY CO., LTD. Address before: 100084, No. 803, building A, Tsinghua Science and Technology Park, No. 8, Zhongguancun East Road, building 1, Haidian District, Beijing Patentee before: Beijing Chuangyi Vision Technology Co., Ltd. |
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| 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: 20090923 Termination date: 20170807 |