CN201336689Y

CN201336689Y - Multi-functional vehicle digital TV set-top box

Info

Publication number: CN201336689Y
Application number: CNU2008202292485U
Authority: CN
Inventors: 沈少阳; 李辉; 高琛
Original assignee: Fujian Newland Communication Science Technology Co Ltd
Current assignee: Fujian Newland Communication Science Technology Co Ltd
Priority date: 2008-12-03
Filing date: 2008-12-03
Publication date: 2009-10-28
Anticipated expiration: 2018-12-03

Abstract

The utility model provides a multi-functional vehicle digital TV set-top box, which comprises an antenna, a tuner and a main control chip, and also comprises an FM receiving module, a GPS electronic navigation module and an LCD display, which are connected with the main control chip. The utility model integrates the FM receiving module, the GPS electronic navigation module and the LCD display, so that the TV set-top box and a plurality of commonly used equipment of a vehicle are integrated into a whole body so as to achieve the multi-function of the TV set-top box.

Description

Multifunctional vehicle mounted digital TV set-top box

[technical field]

The utility model relates to a kind of set-top box, and particularly a kind of vehicle-mounted digital television set-top box belongs to audio frequency and video and moves the digitlization terminal equipment that is received as one at a high speed.

[background technology]

At present, set-top box technique is developed faster, not only is used widely in fixing environment, also progressively be applied in the mobile environment, as the vehicle of running at high speed etc., to satisfy the demand that mobile crowd receives real time information.

As depicted in figs. 1 and 2, disclose a kind of existing a kind of vehicle-mounted digital television set-top box, comprise antenna, tuner TUNER, demodulation chip 8G42, main control chip STi5105, described main control chip STi5105 also comprises CPU, I ₂C bus, transmission stream interface, demultiplexing functional module, frequency division multiple access FDMA, audio decoder and Video Decoder, PES analyzer, blender, DDR memory and audio frequency digital to analog conversion module or the like.Its operation principle is as follows:

Described tuner TUNER is by connecting the antenna receiving digital signals, and front end (passes through I under the control of main control chip STi5105 innernal CPU ₂The C bus) tuner TUNER be tuned to certain digital channel, carry out demodulation by the demodulation chip 8G42 that is connected with tuner, become TS stream input main control chip STi5105 to decode ground GB digital demodulation signal.The transport stream that demodulates (TS stream) data are by transmitting stream interface input main control chip STi5105.TS flow data in the main control chip STi5105 is isolated sound, video PES stream by the demultiplexing functional module, under the control of frequency division multiple access FDMA, be sent to inner audio decoder and Video Decoder, the demultiplexing functional module also extracts the PCR information in the code stream simultaneously, is used for clock recovery.Audio frequency PES stream through the simulated audio signal of maximum six sound channels of output after the audio frequency digital to analog conversion, or is directly exported the SPDIF light signal by the PCM signal of audio decoder decode output audio; Video PES stream is unpacked into video ES stream through the PES analyzer, after the processing through Video Decoder and blender under the cooperation of DDR memory, again by output analog video YPbPr of the digital to analog conversion module in its sheet or rgb video component signal.

But above-mentioned digital TV set-top box has realized moving the function that receives, watches the real-time television program on automobile, but its function is perfect not enough, as not listening to the function of FM broadcasting, does not have abilities such as integrated automobile satellite navigation system, does not also have display device.Can not satisfy the multi-functional requirement of present user.

[utility model content]

The technical problems to be solved in the utility model, be to provide a kind of multifunctional vehicle mounted digital TV set-top box, integrated FM receiver module, GPS electronic navigation module and LCDs become one some common equipments of set-top box and vehicle, realize the multifunction of set-top box.

The utility model is achieved in that a kind of multifunctional vehicle mounted digital TV set-top box, comprises antenna, tuner and main control chip, and this main control chip also comprises I ₂C bus, serial ports, video and graphic virgin system and audio subsystem, this set-top box also comprise a FM receiver module, the I of this FM receiver module and described main control chip ₂The C bus connects.

This set-top box also comprises a GPS electronic navigation module, and this GPS electronic navigation module is connected with the serial ports of described main control chip.

This set-top box also comprises a LCDs, and this LCDs is connected with audio subsystem with the video and graphic processing subsystem of described main control chip respectively.

The utility model set-top box has following advantage: its integrated FM receiver module, GPS electronic navigation module and LCDs, make set-top box have FM receiving function and GPS electronic navigation function, and available LCDs operation display interface, carry out visualized operation, some common equipments of itself and vehicle become one, and realize the multifunction of set-top box.

[description of drawings]

In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.

Fig. 1 is the structured flowchart of vehicle-mounted digital television set-top box in the prior art.

Fig. 2 is the structured flowchart of the main control chip STi5 105 among Fig. 1.

Fig. 3 is the structured flowchart of the utility model vehicle-mounted digital television set-top box.

[embodiment]

See also shown in Figure 3, the multifunctional vehicle mounted digital TV set-top box 100 of the utility model comprises antenna 1, tuner 2 (TUNER), main control chip 3, FM receiver module 4, GPS electronic navigation module 5, LCDs 6, flash memory 7 (FLASH), memory 8 (DDR), EEPROM (Electrically Erasable Programmable Read Only Memo) 9 (EEPROM) and demodulation chip 10.Described main control chip 3 is the STi5105 chip, and it comprises CPU301, transmits stream interface 302, demultiplexing functional module 303, frequency division multiple access 304 (FDMA), audio decoder 305 and Video Decoder 306, PES analyzer 307, blender 308 and audio frequency digital to analog conversion module 309, video digital to analog conversion module 310 etc.Described main control chip also comprises I ₂C bus 311, serial ports 312 (RS232), video and graphic processing subsystem 313 and audio subsystem 314, the I of described FM receiver module 4 and described main control chip 3 ₂ C bus 311 connects, and described GPS electronic navigation module 5 is connected with the serial ports 312 of described main control chip 3, and described LCDs 6 is connected with audio subsystem 314 with the video and graphic processing subsystem 313 of described main control chip 3 respectively.Described tuner 2 is connected with demodulation chip 10 respectively again with main control chip 3, and this tuner 2 is connected with antenna again.

Operation principle of the present utility model is:

Described tuner 2 is by connecting the antenna receiving digital signals, and front end passes through I under the control of main control chip 3 innernal CPUs ₂The C bus tuner 2 be tuned to certain digital channel, carry out demodulation by demodulation chip 10, become TS stream input main control chip 3 to decode ground GB digital demodulation signal.The transport stream that demodulates (TS stream) data are by transmitting stream interface 302 input main control chips 3.TS flow data in the main control chip 3 is isolated sound, video PES stream by demultiplexing functional module 303, under the control of frequency division multiple access 304, be sent to inner audio decoder 305 and Video Decoder 306, the PCR information that while demultiplexing functional module 303 also extracts in the code stream is used for clock recovery.Audio frequency PES stream through the simulated audio signal of maximum six sound channels of output after 309 conversion of audio frequency digital to analog conversion module, or is directly exported the SPDIF light signal by the PCM signal of audio decoder 305 decoding output audios; Video PES stream is unpacked into video ES stream through PES analyzer 307, after the processing through Video Decoder 306 and blender 308 under the cooperation of memory 8, again by 310 output analog video YPbPr or the rgb video component signals of the video digital to analog conversion module in its sheet.

When the user selects to listen to the FM broadcast program, select to want the radio station (such as FM100.6) of listening to by the man-machine interface on the LCDs 6, under the control of main control chip 3 innernal CPUs 301, pass through I ₂C bus 311, according to the intrinsic algorithm of module, the frequency configuration that needs are tuning is to

FM receiver module

4,4 pairs of frequency tunings that set of FM receiver module, carry out demodulating and decoding again, at last by LCDs 6 output videos and audio frequency, so realize the whole receiving function of FM and with the function of user interaction.

GPS electronic navigation module 5 is whenever fixed a time interval and is just sent a data structure (time+data validity (the effective V-of A-is invalid)+latitude+polarity (south poles)+longitude+polarity (the thing utmost point)+speed+angle+date), and main control chip 3 innernal CPUs 301 read these data structures by serial ports 312.The monitoring serial port 312 that has a process not stopping in the main program of main control chip 3 innernal CPUs 31, after receiving data, pass through fixedly algorithm, obtain necessary message, the message with needs changes into man-machine interface again, shows by LCDs 6 when the user needs.

In addition, the software solidification of the utility model set-top box is 7 li of flash memories, and start back program is transferred to operation in the memory 8; System and user's interface is front panel and OSD menu.Front panel has button and infrared reception and emitter.The user watches the information on the OSD menu, by button or remote controller operation operation information is sent among the CPU301, realizes concrete controlled function by CPU301.The various information stores of system access channel, program and complete machine state are in middle EEPROM (Electrically Erasable Programmable Read Only Memo) 9, and this makes the various useful data in shutdown back can not lose.Simultaneously, when starting shooting, information such as various states, setting and program data can therefrom directly be read by system next time, recover the various states of the preceding system of shutdown last time automatically.

Claims

1, a kind of multifunctional vehicle mounted digital TV set-top box comprises antenna, tuner and main control chip, and this main control chip also comprises I ₂C bus, serial ports, video and graphic processing subsystem and audio subsystem is characterized in that: this set-top box also comprises a FM receiver module, the I of this FM receiver module and described main control chip ₂The C bus connects.

2, multifunctional vehicle mounted digital TV set-top box according to claim 1 is characterized in that: this set-top box also comprises a GPS electronic navigation module, and this GPS electronic navigation module is connected with the serial ports of described main control chip.

3, multifunctional vehicle mounted digital TV set-top box according to claim 1 and 2, it is characterized in that: this set-top box also comprises a LCDs, this LCDs is connected with audio subsystem with the video and graphic processing subsystem of described main control chip respectively.