CN102769795B - Onboard Android platform and china mobile multimedia broadcasting (CMMB) playing method thereof - Google Patents
Onboard Android platform and china mobile multimedia broadcasting (CMMB) playing method thereof Download PDFInfo
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- CN102769795B CN102769795B CN201210237415.1A CN201210237415A CN102769795B CN 102769795 B CN102769795 B CN 102769795B CN 201210237415 A CN201210237415 A CN 201210237415A CN 102769795 B CN102769795 B CN 102769795B
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Abstract
The invention discloses an onboard Android platform, and aims to provide an onboard Android platform capable of lowering difficulty in the development of a mobile terminal. The onboard Android platform comprises a China mobile multimedia broadcasting (CMMB) chip module and an application module, wherein the CMMB chip module receives a CMMB signal, processes the received CMMB signal into an audio and video signal carrying an operation interface and an operation logic, and outputs the audio and video signal; and the application module switches an audio and video channel of the onboard Android platform to be a CMMB channel to receive and display the audio and video signal. The invention also discloses a CMMB playing method for the onboard Android platform. The method can be used for the onboard Android platform.
Description
Technical field
The present invention relates to Android platform, especially relate to a kind of method of vehicle-mounted Android platform and broadcasting CMMB thereof.
Background technology
Existing CMMB(China Mobile Multimedia Broadcasting, China Mobile multimedia broadcasting) to receive play-back technology be all utilize CMMB chip module to carry out Received signal strength, it is only the effect of Received signal strength, this just needs to do many things on the mobile terminal device, such as deposit the thing that a series of logics such as platform, channel selection, UI design, Functional Design are very complicated, considerably increase software development difficulty on mobile terminal device.
Summary of the invention
The present invention, in order to solve the effect that prior art CMMB chip module is only Received signal strength, increases the technical problem of the development difficulty of mobile terminal device, provides a kind of method of vehicle-mounted Android platform and broadcasting CMMB thereof.
For solving the problems of the technologies described above, the technical solution used in the present invention is a kind of vehicle-mounted Android platform of design, comprising:
CMMB chip module, it receives CMMB signal, and the audio-video signal becoming to carry operation interface and operation logic by the CMMB signal transacting received exports;
Application module, it is by audio-video signal described in the audio frequency and video passage bridge of vehicle-mounted Android platform to CMMB channel reception and show.
Described vehicle-mounted Android platform also comprises system module, and it receives described audio-video signal and is sent by described audio-video signal;
Described application module comprises for the touch-screen of touch operation and display, the Video Output Modules for output video, the dio Output Modules for output audio and for the coordinate that obtains user's point touching screen and the coordinate sending module sent;
The audio frequency and video processing module that described system module comprises the system request module for receiving the coordinate that described coordinate sending module sends and sent by described audio-video signal according to the coordinate that described system request module receives.
Described Video Output Modules is the photographic means that vehicle-mounted Android platform carries.
Described CMMB chip module comprises the CMMB antenna for receiving CMMB signal connected successively, for the tuner of the CMMB signal that tuning and amplitude modulation receive, carry out sampling for the CMMB signal after exchanging harmonious amplitude modulation and convert it into the demodulation/demodulation multiplexer of digital signal streams, for extracting the business secret key of described digital signal streams and program secret key and the audio/video flow of scrambling in described digital signal streams and data flow being reduced into the condition reception chip of clear stream and being used for decoding to the clear stream that condition reception chip exports and being processed into the application process chip that the audio-video signal that carries operation interface and operation logic exports.
Present invention also offers a kind of method that vehicle-mounted Android platform plays CMMB, comprising:
Receive CMMB signal, and the audio-video signal becoming to carry operation interface and operation logic by the CMMB signal transacting received exports;
By audio-video signal described in the audio frequency and video passage bridge of vehicle-mounted Android platform to CMMB channel reception, and described audio-video signal is presented on photographic means that vehicle-mounted Android platform carries.
The method that described vehicle-mounted Android platform plays CMMB also comprises:
User clicks the operation interface of displaying video;
Android system identification active user clicks the X/Y coordinate of described operation interface, and sends to CMMB chip module;
After CMMB chip module recognizes described X/Y coordinate, judge which some position user clicks, and carried out corresponding operation response.
The present invention is by arranging CMMB chip module, and the audio-video signal utilizing CMMB chip module to become to carry operation interface and operation logic by the CMMB signal transacting of reception exports.Compared with prior art, this patent has following beneficial effect:
1, all control logic is realized by CMMB chip module, greatly reduces mobile terminal device software development difficulty
2, because CMMB chip module has a lot, whole logic control changes CMMB chip module into and realizes, and greatly reduces the chimeric degree of CMMB chip module and mobile terminal device, makes to replace CMMB chip module and becomes very easy, reduce development cost.
Accompanying drawing explanation
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail, wherein:
Fig. 1 is the structure principle chart of the vehicle-mounted Android platform of the present invention;
Fig. 2 is the flow chart that the vehicle-mounted Android platform of the present invention plays the method for CMMB;
Fig. 3 is the coordinate acquisition that the vehicle-mounted Android platform of the present invention plays the method for CMMB and the flow chart sent.
Embodiment
Refer to Fig. 1.The vehicle-mounted Android platform of the present invention, comprises the CMMB chip module, system module and the application module that connect successively.Wherein:
CMMB chip module is for receiving CMMB signal, and the audio-video signal becoming to carry operation interface and operation logic by the CMMB signal transacting received exports.Described CMMB chip module comprises the CMMB antenna, tuner, demodulation/demodulation multiplexer, condition reception chip and the application process chip that connect successively.Wherein:
CMMB antenna is used for receiving satellite signal, namely for receiving CMMB signal.
The CMMB signal that tuner receives for tuning and amplitude modulation, be equivalent to the effect of trap signal.
Demodulation/demodulation multiplexer carries out sampling and converting it into digital signal streams for the CMMB signal after exchanging harmonious amplitude modulation.Signal stream comprises video, audio frequency and some data.
The audio/video flow of scrambling in described digital signal streams and data flow for extracting business secret key and the program secret key of described digital signal streams, and are reduced into clear stream by condition reception chip.
Application process chip is used for decoding to the clear stream that condition reception chip exports and is processed into the audio-video signal carrying operation interface and operation logic and exports.Application process chip completes the decoding of audio/video flow, the parsing of data broadcast and process, the whole control flow of vehicle-mounted first die-filling group of CMMB and the control of peripheral interface and signal exports.
CMMB chip module also comprises power control module and audio A/D modular converter, wherein: power control module is an independently part, his Main Function is that control signal receives and transmitting power, make system total power level minimally, can solve due to near-far resistance and self-interference problem.The effect of audio A/D modular converter is that stereo etc. in audio signal is improved the signal of quality to parsing, and is then directly transferred to system module.
System module is for receiving described audio-video signal and being sent by described audio-video signal.
Application module is used for the audio-video signal sent by system module described in the audio frequency and video passage bridge of vehicle-mounted Android platform to CMMB channel reception and shows.
System module comprises system request module, audio frequency and video processing module and interface module, wherein:
The coordinate that system request module sends for receiving described coordinate sending module.Described audio-video signal sends by the coordinate that audio frequency and video processing module is used for receiving according to described system request module.
Application module comprises for the touch-screen of touch operation and display, the Video Output Modules for output video, the dio Output Modules for output audio and for the coordinate that obtains user's point touching screen and the coordinate sending module sent.Described Video Output Modules is the photographic means that vehicle-mounted Android platform carries.
The effect of video, audio frequency process is exactly receive the signal sent by upper layer module, and resolves to the signal that lower one deck module can identify.The effect that system sends request is that the coordinate that application module sends is sent to CMMB chip module.Interface module is exactly that this interface had all is exposed to upper layer application, allows upper layer application by these interfaces acquisition information such as video, audio frequency below, also can be reached the effect of control CMMB chip module indirectly by these interfaces.
In application module, the effect of video frequency output is the video flowing that sends over of display system over the display; The effect that audio frequency exports obtains the audio signal that system sends over, and enable voice exports from loudspeaker; The effect of coordinate sending module obtains X/Y coordinate time user clicks screen, and the interface that calling system comes out sends to system X/Y coordinate.
CMMB chip module is after receiving CMMB vision signal, can process vision signal, such as add some visualized operation interface, integrated certain operations orders etc., after having arrived application process chip in other words, originally simple vision signal there occurs change, becomes that carry operation interface with vision signal that is operation logic, time it is uploaded to above like this, just make design operation interface without upper layer application, because it just carries operation interface itself.Compared with prior art, this patent has following beneficial effect:
1, all control logic is realized by CMMB chip module, greatly reduces mobile terminal device software development difficulty
2, because CMMB chip module has a lot, whole logic control changes CMMB chip module into and realizes, and greatly reduces the chimeric degree of CMMB chip module and mobile terminal device, makes to replace CMMB chip module and becomes very easy, reduce development cost.
Refer to Fig. 2, the vehicle-mounted Android platform of the present invention plays the method for CMMB, comprising:
1, receive CMMB signal, and the audio-video signal becoming to carry operation interface and operation logic by the CMMB signal transacting received exports;
2, by audio-video signal described in the audio frequency and video passage bridge of vehicle-mounted Android platform to CMMB channel reception, and described audio-video signal is presented on photographic means that vehicle-mounted Android platform carries.
Receive CMMB vision signal to be completed by CMMB chip module, after CMMB chip module receives the vision signal of satellite launch, vision signal can be sent to android system, when user is after CMMB software is opened in operation interface click, system will switch to above CMMB the video channel of android system and voice-grade channel, the photographic means that now CMMB software is just carried by android system carrys out the CMMB vision signal that display system transmits, and this just reaches the object playing CMMB.
Refer to Fig. 3, the method that the vehicle-mounted Android platform of the present invention plays CMMB also comprises the method sending CMMB order, and it comprises:
1, user clicks the operation interface of displaying video;
2, android system identification active user clicks the X/Y coordinate of described operation interface, and sends to CMMB chip module;
3, after CMMB chip module recognizes described X/Y coordinate, judge which some position user clicks, and carried out corresponding operation response.
The method sending CMMB order is only that screen coordinate X, the Y sending active user's click realizes.The vision signal that the transmission of CMMB chip module comes up is through after chip oneself is changed, and is a kind of vision signal having contained operation interface.When user clicks facing to operation interface time, android system can identify X, the Y-coordinate that active user clicks, then X, Y-coordinate are sent to system, system passes to CMMB chip module again, after now CMMB chip module recognizes the X/Y coordinate applied and pass and come, understand oneself carry out judgement user click which some position, then oneself just carried out certain operation response.So just completely CMMB chip module and upper layer application have been separated, when you need to replace CMMB chip module time, only need to change a kind of CMMB chip module just passable, upper layer application need not go to consider that the interface with new CMMB chip module unifies negotiation problem completely.
The present invention is by arranging CMMB chip module, and the audio-video signal utilizing CMMB chip module to become to carry operation interface and operation logic by the CMMB signal transacting of reception exports.Compared with prior art, this patent has following beneficial effect:
1, all control logic is realized by CMMB chip module, greatly reduces mobile terminal device software development difficulty.
2, because CMMB chip module has a lot, whole logic control changes CMMB chip module into and realizes, and greatly reduces the chimeric degree of CMMB chip module and mobile terminal device, makes to replace CMMB chip module and becomes very easy, reduce development cost.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a vehicle-mounted Android platform, is characterized in that comprising:
CMMB chip module, it receives CMMB signal, and the audio-video signal becoming to carry operation interface and operation logic by the CMMB signal transacting received exports;
Application module, it is by audio-video signal described in the audio frequency and video passage bridge of vehicle-mounted Android platform to CMMB channel reception and show;
Described vehicle-mounted Android platform also comprises system module, and it receives described audio-video signal and is sent by described audio-video signal;
Described application module comprises for the touch-screen of touch operation and display, the Video Output Modules for output video, the dio Output Modules for output audio and for the coordinate that obtains user's point touching screen and the coordinate sending module sent;
The audio frequency and video processing module that described system module comprises the system request module for receiving the coordinate that described coordinate sending module sends and sent by described audio-video signal according to the coordinate that described system request module receives.
2. vehicle-mounted Android platform according to claim 1, is characterized in that: described Video Output Modules is the photographic means that vehicle-mounted Android platform carries.
3. vehicle-mounted Android platform according to claim 1, it is characterized in that: described CMMB chip module comprises the CMMB antenna for receiving CMMB signal connected successively, for the tuner of the CMMB signal that tuning and amplitude modulation receive, carry out sampling for the CMMB signal after exchanging harmonious amplitude modulation and convert it into the demodulation/demodulation multiplexer of digital signal streams, for extracting the business secret key of described digital signal streams and program secret key and the audio/video flow of scrambling in described digital signal streams and data flow being reduced into the condition reception chip of clear stream and being used for decoding to the clear stream that condition reception chip exports and being processed into the application process chip that the audio-video signal that carries operation interface and operation logic exports.
4. vehicle-mounted Android platform plays a method of CMMB, it is characterized in that comprising:
Receive CMMB signal, and the audio-video signal becoming to carry operation interface and operation logic by the CMMB signal transacting received exports;
By audio-video signal described in the audio frequency and video passage bridge of vehicle-mounted Android platform to CMMB channel reception, and described audio-video signal is presented on photographic means that vehicle-mounted Android platform carries;
The method that described vehicle-mounted Android platform plays CMMB also comprises:
User clicks the operation interface of displaying video;
Android system identification active user clicks the X/Y coordinate of described operation interface, and sends to CMMB chip module;
After CMMB chip module recognizes described X/Y coordinate, judge which some position user clicks, and carried out corresponding operation response.
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| EP2275912A1 (en) * | 2009-07-10 | 2011-01-19 | Lg Electronics Inc. | Terminal for broadcasting and method of controlling the same |
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