CN101047809A - Multi-standard mobile digital TV receiving device and method based on serial bus communication - Google Patents
Multi-standard mobile digital TV receiving device and method based on serial bus communication Download PDFInfo
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- CN101047809A CN101047809A CNA2007100728038A CN200710072803A CN101047809A CN 101047809 A CN101047809 A CN 101047809A CN A2007100728038 A CNA2007100728038 A CN A2007100728038A CN 200710072803 A CN200710072803 A CN 200710072803A CN 101047809 A CN101047809 A CN 101047809A
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Abstract
This invention relates to a multi-standard mobile digital TV receiving device based on serial bus communicatioin and a method, in which, the receiving device includes: a front of a mobile digital TV receiving device used in receiving and channel decoding, a back of the device used in video decoding and playing and a serial bus interface for exchanging data between the front and the back, and the front receives TV signal data and carries out channel decoding process to form video data flows in conformity with the serial bus interface and the back receives the video data flows by the interface to decode and play them, which changes the front output to the mode of serial bus interface to reduce cost.
Description
Technical field
The present invention relates to mobile TV receiving system and method for reseptance, particularly multi-standard mobile digital TV receiving device and method of work thereof.
Background technology
Numerous serial bus communication standards have been released in the development of computer (PC) industry and consumer electronics of new generation, such as USB, SDIO commonly used, SPI, I2S, I2C or the like.USB is the abbreviation of English Universal SerialBus, promptly is " USB ", its former a kind of before this new interface technology that is applied in the PC field.After 1998, along with built-in support module to USB interface among the Windows, add day by day increasing of USB device, USB interface has just progressively been come into the practical stage.USB OTG is the abbreviation of USBOn-The-Go, is the technology that developed recently gets up, and is mainly used in the connection between various equipment or mobile device, carries out exchanges data.The transmission speed of USB 1.1 standards only is 12Mbps, and USB2.0 has been increased to 480Mbps with data transfer between devices speed, and the raising of speed means exactly that for user's largest benefit the user can use external equipment more efficiently.
The SD interface also is developed to the SDIO interface for a new generation, and the bus by the SD card connects other peripheral hardwares, wireless network card for example, and it is first-class to make a video recording.SDIO 1.0 standard definitions two types SDIO card: 1, Quan Su SDIO card, transfer rate can surpass 100Mbps; 2, the SDIO card of low speed, the clock pulse speed of support is between 0 to 400KHz.
SPI (Serial Peripheral Interface, Serial Peripheral Interface (SPI)) bus system is a kind of synchronous serial Peripheral Interface that Motorola proposes, the characteristics that holding wire is few, agreement is simple, transmission speed is fast are arranged, therefore there are many peripheral components all to adopt spi bus, as Flash RAM, A/D converter, light-emitting diode display, MCU and computer network etc.The standard spi bus, data transfer clock speed is brought up to 25MHz.Serial SPI interface needs two control lines (CS and SCLK) and two data wires (DIN/SDI and DOUT/SDO).Bus has uses the less control and the advantage of data wire.The SPI interface can be operated in full-duplex mode (data can send and receive at one time).Do not define maximum data rate in the SPI standard.External equipment has defined the maximum data rate of oneself, is generally order of megahertz.Microprocessor can adapt to the SPI data rate of wide range.
I2S (Inter-IC Sound Bus) is that PHILIPS Co. is a kind of bus standard that the audio data transmission between the digital audio-frequency apparatus is formulated.In the I2S of PHILIPS Co. standard, both stipulated the hardware interface standard, also stipulated the form of digital audio-frequency data.I2S has 3 main signals: 1, serial clock SCLK, also be bit clock (BCLK), i.e. each data of corresponding digital audio.2, frame clock LRCK is used for the data of switching right and left sound channel.3, serial data SDATA is exactly a voice data.Sometimes can be synchronous better between system in order to make, also need to transmit a signal MCLK in addition, be called master clock, also be system clock (Sys Clock).
I2C (Inter-Integrated Circuit) bus also is PHILIPS Co.'s exploitation, and this is a kind of twin wire universal serial bus, is used to connect microcontroller and ancillary equipment thereof.The I2C bus resulted from the eighties, was initially the audio and video equipment exploitation, nowadays mainly used in server admin, comprising the communication of single component state.
Along with the fusion and the innovation of technology, these universal serial bus are expanded the application category of oneself just separately, have broken through the application of audio stream transmission such as I2S, have appeared on other data transmission applications such as video flowing; USB also is not only a Peripheral Interface as PC, and in the embedded system field extensively as seen.
In the portable electric consumers of individual fashion, such as PDA, MP4, Portable PC, we often can see the interface of USB, SDIO, SPI, I2S or the like these universal serial bus at present.
Development along with the whole industry of Digital Television, preparing to welcome a mobile TV climax at present in the world, the sign of this phenomenon is that the standard of relevant mobile TV is launched respectively, several big standard such as DVB-H, T-DMB, MediaFLO and ISDB-T factions occurred, wherein that comparative maturity is European standard DVB-H and Korea S standard T-DMB.DVB-H pilots in countries such as Britain, Finland, Spain, Australia at present.Except TV program, DVB-H can also support digital radio broadcasting and audio service, is can be by replenishing that the montage that cellular network is downloaded is served.
T-DMB grows up on the basis of European DAB (digital audio broadcasting).Make T-DMB have much the market competitiveness in the advantage aspect travelling performance and the image quality.Except Korea S, countries such as Germany, France also will carry out T-DMB and pilot.Compare with DVB-T, its main advantage is: the channel switch time is lower; There is not the restriction on the reaction time; Each second, frame number was higher; And, be upgraded to the required fund input of T-DMB still less by DAB.
The U.S. and Japan then determine to adopt MediaFLO and ISDB-T standard respectively based on the consideration of national interests.Adopt the ISDB-T technology, can cut into 13 frequency ranges to a 6MHz channel, utilize wherein 12 frequency ranges broadcast household digital TV programme, remaining 1 frequency range then is used for the broadcasting of TV program.And the MediaFLO of high pass is the system of mobile TV exploitation to be better than T-DMB and DVB-H in system and terminal performance specially.
China also in the promotion of actively carrying out own mobile TV standard, has proposed several technical schemes such as STiMi and class IP-DAB after releasing terrestrial DTV standard DMB-TH.
At present the uncertainty of mobile TV standard makes that the mobile TV terminal design is at a loss as to what to do, and particularly portable mobile digital TV terminal because want lay special stress on volume, power consumption, compatibility or the like, makes this series products designing technique slower development.Have such problem, it is too high and product up-gradation is difficult that multi-standard compatibility designs then cost, and single standard designs that then application surface is too narrow, be not suitable for the mobile application in big zone, and the uncertainty of standard makes the market risk very big.
Summary of the invention
One of purpose of the present invention is to provide a kind of multi-standard mobile digital TV receiving device based on serial bus communication of applicable multiple television standard.
Two of purpose of the present invention is to provide a kind of multi-standard mobile digital TV method of reseptance based on serial bus communication of applicable multiple television standard.
One of purpose of the present invention can realize like this, designs a kind of multi-standard mobile digital TV receiving device based on serial bus communication, comprise be used to receive, the mobile digital TV receiving device front end of channel-decoding; Be used for the mobile digital TV receiving device rear end that video decode is play; The serial bus interface that is used for exchanges data between the described mobile digital TV receiving device front-end and back-end;
Mobile digital TV receiving device front end received television signal data and channel-decoding are handled and are formed the video data stream that meets serial bus interface, and the mobile digital TV receiving device rear end is carried out video decode by serial bus interface receiving video data stream and play.
Two of purpose of the present invention can realize like this, designs a kind of multi-standard mobile digital TV method of reseptance based on serial bus communication, may further comprise the steps:
F, mobile digital TV receiving device is separated into has front end that receives processing capacity and rear end, be provided for the serial bus interface of front end and rear end swap data with video decode function;
G, at front end channel decoder is set, driver module is installed in the rear end;
H, the configuration code of mobile TV standard correspondence is set, configuration code provides with the IP title, the corresponding IP of mobile TV standard, and a plurality of mobile TV standards form the IP group, the IP group leaves in the driver module, and channel decoder is furnished with a configuration code by the mobile TV standard;
After I, front end and rear end are inserted and be communicated with, there is the rear end that the power supply of front end, front end work are provided by serial bus interface;
E, front end received television signal data and channel-decoding are handled and are formed the video data stream that meets serial bus interface, and the rear end is carried out video decode by serial bus interface receiving video data stream and play.
The front end output transform of mobile digital TV of the present invention is the interface mode of universal serial bus, energy is low-cost, the mobile TV reception with multiple digital television standard is widely applied on the mobile video playback equipment with serial communication function neatly, and this structure independently, the general mobile digital TV Front-end Design of interface, can make the mobile terminal device that can carry out decoding digital video of maximum amounts possess the function of the mobile digital TV of the multiple standards of watching.
Description of drawings
Fig. 1 is the system configuration schematic diagram of preferred embodiment of the present invention.
Fig. 2 is the functional block diagram of one of preferred embodiment of the present invention.
Fig. 3 is two a functional block diagram of preferred embodiment of the present invention.
Fig. 4 is three a functional block diagram of preferred embodiment of the present invention.
Fig. 5 is four a functional block diagram of preferred embodiment of the present invention.
Embodiment
The invention will be further described below in conjunction with embodiment.
As shown in Figure 1, a kind of multi-standard mobile digital TV receiving device based on serial bus communication comprises:
Be used to receive, the mobile digital TV receiving device front end 1 of tuning, channel-decoding;
Be used for the mobile digital TV receiving device rear end 2 that video decode is play;
The serial bus interface 3 that is used for exchanges data between described mobile digital TV receiving device front end 1 and the rear end 2;
Mobile digital TV receiving device front end 1 received television signal data and channel-decoding are handled and are formed the video data stream that meets serial bus interface 3, and mobile digital TV receiving device rear end 2 is carried out video decode by serial bus interface 3 receiving video data streams and play.
It is numerous and uncertain and cause the situation of product design technology slower development to face the mobile TV standard at present portable mobile digital TV terminal, the present invention proposes a kind of USB of passing through, SDIO, SPI, the pattern of serial bus communications such as I2S is independent with the digital TV front-end structure, and its data are sent to Digital Television back-end processing unit, and utilize the FPGA of band DSP to realize the technical scheme of the channel-decoding of various criterion.
Described mobile digital TV receiving device front end 1 comprises antenna 11, the tuner 12 that is used for signal tuning, the A/D converter 13 that is used for the signal data conversion that is used for received television signal, the channel decoder 14 that is used for channel-decoding.
Described antenna 11, embodiment are to adopt narrow-band antenna.Narrow-band antenna will be at each mobile TV standard, the antenna of the different frequency range that changes the outfit.
Described tuner 12 is the all-channel tuning device.Full rnage tuner 12 has comprised radio frequency (RF) and intermediate frequency (IF) function, promptly is a multiband tuner.This multiband tuner provides general digital broadcasting receiving function, makes that it and international standard or regional disparity are irrelevant.It can receive the signal of all broadcast standards of issue up to now.Thereby it can handle any analog radio form of all terrestrial broadcasting frequency ranges and standard bands, can tackle all digital terrestrial broadcast standards at present.
Full rnage tuner 12 can also comprise AD converter 13, and the sampling rate of analog to digital conversion circuit is at least at 40Msps, and keeps 10 sampling precision, like this with the different television standard requirement of compatibility.Through AD converter 13, digitized channel signal is sent to FPGA 15 and handles.Can certainly utilize the general AD among the FPGA 15.
Described channel decoder 14 comprises FPGA 15.Described FPGA 15 is for having the FPGA of DSP.Described channel decoder 14 also comprises buffer register 16.The design of mobile TV channel decoder 14 comprises FPGA 15 and the peripheral buffer 16 of being with DSP, as DDR.Also the FPGA of band DSP can be called DSP, or be called the hybrid architecture that adopts DSP to combine with FPGA based on FPGA.Adopt the method flexibly based on software of Programmable DSPs to optimize the algorithm of realizing channel-decoding, and realize the parallel input of 10 AD with FPGA, FPGA also utilizes register, the realization of function auxiliary channel decoding schemes such as clock control, simple algorithm simultaneously.The mobile TV channel decoder of many standards such as FPGA realization by band DSP.
The FPGA 15 of band DSP can adopt the ECP2 Series FPGA of Lattice company, the Cyclone II Series FPGA of altera corp, and the Virtex-II Pro Series FPGA of Xilinx company.
Adopt the ECP2-50 of Lattice among embodiment.Lattice ECP2 is low-cost FPGA, meets the cost performance requirement of using at consumer products.
Because the technical development of FPGA makes PFGA itself just have the data input/output port of different performance, such as bidirectional port, difference input/output port or the like.So also can utilize FPGA just directly can realize various serial communication interfaces.
Described mobile digital TV receiving device rear end 2 comprises video decode playing module 22 and the driver module 21 of front end 1 operating state is set by serial bus interface 3.
Be installed in the driver module 21 on the video decode terminal, this driver module 21 is provided with the structure independently operating state and the mode of operation of mobile TV front end by interface.
Described serial bus interface 3 is the wherein a kind of of USB, SDIO, SPI serial bus interface.
Described serial bus interface 3 is I2S and I2C serial bus interface.
The power supply of described front end 1 is imported by serial bus interface 3 by rear end 2.
Here common serial communication comprises USB, SDIO, SPI, I2S, I2C etc. in the Interface design, and based on these mechanicss of communication, has realized bidirectional operation substantially, and I2S and I2C combination that wherein can only one-way function work have realized the two-way function of data.Comprised also that in these interfaces power supply is input to the independently method of mobile TV front end of structure from the video decode terminal.
Serial bus interface among the present invention can be realized with special-purpose interface chip, can adopt ADM8511 such as USB interface.But be based on FPGA and realize that all serial communication interfaces are a kind of trend.
As shown in Figure 2, by USB interface power supply is delivered to the mobile TV front end from the video decode terminal, differential signal D+, D-meet the USB1.1/2.0 standard.Rate of data signalling can the two-way exchange data from 12Mbps to 480Mbps.
As shown in Figure 3, by the SDIO interface power supply is delivered to the mobile TV front end from the video decode terminal, this interface uses the pattern of the full speed in the SDIO standard definition and the transmission mode of 4-bit, and transfer rate can surpass 100Mbps.
As shown in Figure 4, by the SPI interface power supply is delivered to the mobile TV front end from the video decode terminal, SCLK is a serial clock, and SCS is that subordinate is selected, and DIN, DOUT represent data input and output.At first transmit highest order during the SPI transmitting serial data.The baud rate velocity magnitude depends on SPI hardware, and it can reach 10Mbps and gets final product in mobile TV is used.
As shown in Figure 5, add the I2C interface by I2S power supply is delivered to the mobile TV front end from the video decode terminal.Add among the I2C at I2S, the I2S bus is delivered to the video decode terminal with digital video frequency flow from the mobile TV front end, and the video decode terminal is by the control of this semiduplex bus realization of I2C to the mobile TV front end.
The present invention has designed the interface of mobile TV front end to the video decode terminal with mobile TV front end independent design based on technology of serial communication commonly used, has opened up the new approaches of mobile TV design.In order to cooperate existing video decode terminal, the present invention has the embodiment of four kinds of Interface design, is respectively USB interface, the SDIO interface, and SPI interface, I2S add the I2C interface.Existing video decode terminal is not changed the existing serial interface physically or is changed a little and just can meet one of above-mentioned four kinds of interfaces.Because the mobile TV channel-decoding of many standards is based on the FPGA of band DSP and realizes, and dispose outside buffer, so on principle, can realize the digital-TV channel decoding processing of present any standard, by buying the intellectual property of relevant channel-bank technology to the standard side of having and being transplanted on the FPGA of band DSP the IP of the mobile TV standard that perhaps own design compilation channel-decoding code can obtain mentioning among the present invention.This IP can be along with the improvement of the upgrading of mobile TV standard and FPGA technology and is improved constantly oneself cost performance.
A kind of multi-standard mobile digital TV method of reseptance based on serial bus communication may further comprise the steps:
A, mobile digital TV receiving device is separated into has front end that receives processing capacity and rear end, be provided for the serial bus interface of front end and rear end swap data with video decode function;
B, at front end channel decoder is set, driver module is installed in the rear end;
C, the configuration code of mobile TV standard correspondence is set, configuration code provides with the IP title, the corresponding IP of mobile TV standard, and a plurality of mobile TV standards form the IP group, the IP group leaves in the driver module, and channel decoder is furnished with a configuration code by the mobile TV standard;
After D, front end and rear end are inserted and be communicated with, there is the rear end that the power supply of front end, front end work are provided by serial bus interface;
E, front end received television signal data and channel-decoding are handled and are formed the video data stream that meets serial bus interface, and the rear end is carried out video decode by serial bus interface receiving video data stream and play.
The mobile TV channel decoder also comprises the configuration code of FPGA, and its title with IP provides, the corresponding IP here of each mobile TV standard, and these IP are packaged in the driver module.The mobile TV standard here comprise DVB-H T, DMB-TH, T/S-DMB, MediaFLO, STiMi or the like.
Driver module will be installed on the terminal that has the video decode function, driver module moves on the operating system of terminal, by the Interface design among the present invention the operating state and the mode of operation of independent mobile TV front end can be set, and on the software interface play to the video decode of terminal itself of the dynamic image distribution that the mobile TV front end is sent here.
The difference of the embedded OS that driver module adopts according to video decode terminal itself is also classified by operating system, as based on Wince, linux, Windows Mobile, Symbian, Smartphone, Palm or the like.Driving and each operating system about this class interface are combined application.
By serial communication interface, the structure independently front end of Digital Television can insert on the mobile terminal device built-in or outward.
Claims (10)
1, a kind of multi-standard mobile digital TV receiving device based on serial bus communication is characterized in that: comprise
Be used to receive, the mobile digital TV receiving device front end (1) of channel-decoding;
Be used for the mobile digital TV receiving device rear end (2) that video decode is play;
The serial bus interface (3) that is used for exchanges data between described mobile digital TV receiving device front end (1) and rear end (2);
Mobile digital TV receiving device front end (1) received television signal data and channel-decoding are handled and are formed the video data stream that meets serial bus interface (3), and mobile digital TV receiving device rear end (2) are carried out video decode by serial bus interface (3) receiving video data stream and play.
2, the multi-standard mobile digital TV receiving device based on serial bus communication according to claim 1 is characterized in that:
Described mobile digital TV receiving device front end (1) comprises antenna (11), the tuner (12) that is used for signal tuning, the A/D converter (13) that is used for the signal data conversion that is used for received television signal, the channel decoder (14) that is used for channel-decoding;
Described mobile digital TV receiving device rear end (2) comprises video decode playing module (22) and the driver module (21) of front end (1) operating state is set by serial bus interface (3).
3, the multi-standard mobile digital TV receiving device based on serial bus communication according to claim 2 is characterized in that:
Described tuner (12) is the all-channel tuning device;
Described channel decoder (14) comprises FPGA (15).
4, the multi-standard mobile digital TV receiving device based on serial bus communication according to claim 3 is characterized in that: described FPGA (15) is for having the FPGA of DSP.
5, the multi-standard mobile digital TV receiving device based on serial bus communication according to claim 4 is characterized in that: described channel decoder (14) also comprises buffer register (16).
6, the multi-standard mobile digital TV receiving device based on serial bus communication according to claim 1 is characterized in that: described serial bus interface (3) is the wherein a kind of of USB, SDIO, SPI serial bus interface.
7, the multi-standard mobile digital TV receiving device based on serial bus communication according to claim 1 is characterized in that: described serial bus interface (3) is I2S and I2C serial bus interface.
8, the multi-standard mobile digital TV receiving device based on serial bus communication according to claim 1 is characterized in that: the power supply of described front end (1) is imported by serial bus interface (3) by rear end (2).
9, the multi-standard mobile digital TV receiving device based on serial bus communication according to claim 3 is characterized in that: described channel decoder comprises the configuration code data in (14).
10, a kind of multi-standard mobile digital TV method of reseptance based on serial bus communication is characterized in that may further comprise the steps:
A, mobile digital TV receiving device is separated into has front end that receives processing capacity and rear end, be provided for the serial bus interface of front end and rear end swap data with video decode function;
B, at front end channel decoder is set, driver module is installed in the rear end;
C, the configuration code of mobile TV standard correspondence is set, configuration code provides with the IP title, the corresponding IP of mobile TV standard, and a plurality of mobile TV standards form the IP group, the IP group leaves in the driver module, and channel decoder is furnished with a configuration code by the mobile TV standard;
After D, front end and rear end are inserted and be communicated with, there is the rear end that the power supply of front end, front end work are provided by serial bus interface;
E, front end received television signal data and channel-decoding are handled and are formed the video data stream that meets serial bus interface, and the rear end is carried out video decode by serial bus interface receiving video data stream and play.
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| CNA2007100728038A CN101047809A (en) | 2007-01-04 | 2007-01-04 | Multi-standard mobile digital TV receiving device and method based on serial bus communication |
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| CNA2007100728038A CN101047809A (en) | 2007-01-04 | 2007-01-04 | Multi-standard mobile digital TV receiving device and method based on serial bus communication |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646024A (en) * | 2008-08-08 | 2010-02-10 | 希姆通信息技术（上海）有限公司 | Method and device for realizing multi-standard compatibility of mobile digital television |
| CN101923529A (en) * | 2009-06-15 | 2010-12-22 | 飞兆半导体公司 | Universal serial bus (USB) to digital video |
| CN101345869B (en) * | 2008-07-11 | 2011-02-02 | 华为技术有限公司 | Signal receiving method and system, and video decoding device |
| CN102256174A (en) * | 2011-07-25 | 2011-11-23 | 北京视博数字电视科技有限公司 | Digital television receiving equipment |
-
2007
- 2007-01-04 CN CNA2007100728038A patent/CN101047809A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345869B (en) * | 2008-07-11 | 2011-02-02 | 华为技术有限公司 | Signal receiving method and system, and video decoding device |
| CN101646024A (en) * | 2008-08-08 | 2010-02-10 | 希姆通信息技术（上海）有限公司 | Method and device for realizing multi-standard compatibility of mobile digital television |
| CN101923529A (en) * | 2009-06-15 | 2010-12-22 | 飞兆半导体公司 | Universal serial bus (USB) to digital video |
| CN102256174A (en) * | 2011-07-25 | 2011-11-23 | 北京视博数字电视科技有限公司 | Digital television receiving equipment |
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Open date: 20071003 |