CN101014103A - Digital multimedia reception device - Google Patents
Digital multimedia reception device Download PDFInfo
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- CN101014103A CN101014103A CNA2007100374739A CN200710037473A CN101014103A CN 101014103 A CN101014103 A CN 101014103A CN A2007100374739 A CNA2007100374739 A CN A2007100374739A CN 200710037473 A CN200710037473 A CN 200710037473A CN 101014103 A CN101014103 A CN 101014103A
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Abstract
The invention discloses one digital multi-media receiver, which comprises radio receive module, analogue digital conversion module, hard and soft interface module and outer computer, wherein, the said out computer runs basic band process module, signal analysis module, visual and audio frequency decoding module and human to machine interface module, wherein, the radio signal is received through radio receive modules through analogue modules, etch to realize visual and audio play.
Description
Technical field
The present invention relates to wireless communication field, particularly about a kind of digital multimedia receiver that adopts the software radio mode to realize baseband processing module.
Background technology
Digital multimedia receiver is widely used in digital audio broadcasting and the digital TV receiving system field, and product form can be divided into:
A1, portable terminal: digital multimedia receiver is built in the cell mobile communication systems;
B1, portable multimedia player (PMP): digital multimedia receiver is built among the PMP, realizes the digital video that moves, the reception and the playing function of audio frequency;
C1, peripheral hardware computer socket: digital multimedia receiver is made up of hardware components and software section, and wherein software section runs on the peripheral hardware computer.
The present invention be directed to the improvement of the product form of peripheral hardware computer socket, adopted the notion of software radio.Software radio is that modularization, standardized hardware cell are coupled together with the form of standard open, forms a general hardware platform, realizes the open Wireless Telecom Equipment of various radio communication functions by software loading.Thus, the exploitation of the new system of radio communication, new product, new business will progressively forward on the software, and the value of the product of radio communication will be embodied on the software more and more.
Existing peripheral hardware computer socket need be finished the signal processing of base band by hardware components, and with the broadcast of software section realization medium, theory diagram as shown in Figure 1.Hardware components comprises Receiver Module, is used for received RF signal; Analog digital conversion (ADC) module is a digital signal with analog signal conversion; Baseband processing module is realized decoding, the demodulation of channel; Hard soft interface module, with digital data transmission to the peripheral hardware computer, described hard soft interface module connection hardware part and software section, be plugged on the peripheral hardware computer, can be USB (USB) interface, peripheral component interconnection (PCI) interface, PC memory card international association (PCMCIA) interface etc.; The peripheral hardware computer, the module of software section is all moved thereon, and software section comprises the signaling parsing module, is used for decomposing, resolving video and audio signal; Video and audio decoder module are used for decoded video and audio signal respectively; Man-machine interface (MMI) module is used to realize the broadcast of video and audio frequency, also is the demonstration of image and the output of sound.
The weak point of existing plug-in unit product is: the baseband processing module function is finished by hardware chip, and the kind of present audio broadcasting and TV signal is a lot, if adopt the mode of baseband processing module hardwareization to realize that multimode receives, must be at each pattern, develop and produce corresponding receiving chip, for example to receive frequency modulation(FM) (FM) signal of simulation, just must develop the baseband processing chip of energy analog demodulator or digital demodulation FM signal.The exploitation of new chip all need be passed through factory's flow, manufactures supervisor, and cost is very expensive.
In addition, as chip is upgraded, optimized, also need flow, manufacturing etc. again, upgrade cost is very high.
In addition, be the power consumption problem of solution baseband processing module, the Receiver Module of front end, the ADC module must adopt expensive manufacturing process, realizes that difficulty is big, and cost is also very high.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of digital multimedia receiver that adopts the software radio mode to realize baseband processing module, wherein, the baseband processing module function is realized by computer software, greatly reduces exploitation and upgrade cost.
The present invention is achieved by the following technical solutions: a kind of digital multimedia receiver comprises Receiver Module, received RF signal at least; The analog digital modular converter is a digital signal with analog signal conversion; Hard soft interface module, with digital data transmission to the peripheral hardware computer; The peripheral hardware computer, move baseband processing module, signaling parsing module, video and audio decoder module and human-machine interface module on the described peripheral hardware computer, radiofrequency signal is after Receiver Module receives, successively after analog digital modular converter, hard soft interface module, baseband processing module, signaling parsing module, video and audio decoder resume module, input to human-machine interface module, realize the broadcast of video and audio frequency.
Further, described baseband processing module comprises that at least described baseband processing module comprises I/Q demodulation submodule at least, and the data parsing that is used for that hard soft interface is read in is I road and the Q circuit-switched data behind the quadrature sampling; The syndrome module is used to correct baseband signal data frequency deviation and time deviation synchronously; The synchronous submodule of OFDM is used to calculate the estimated value of the correct amount of synchronous syndrome module; Automatic gain control submodule is used for baseband signal is carried out automatic gain control; OFDM demodulation submodule is used for the demodulation conversion of the OFDM of baseband signal; DQPSK demodulation submodule is used for the demodulation to the difference quadrature phase shift signal; Frequency and time deinterleaving submodule are used to separate frequency interlacing and conciliate time-interleaved; The convolutional code decoder submodule is used for the decoding of convolution code, restores the preceding signal data of transmitting terminal convolutional encoding; Energy removes to disturb submodule, is used to remove the scrambler of energy dissipation, restores the preceding signal data of transmitting terminal energy dissipation; Multiplexed configuration information decoder submodule is used to the decoding of Traffic Channel that basic parameter configuration is provided; Cyclic redundancy code detection check submodule, the cyclic redundancy code detection check that is used for signal, wherein, I/Q demodulation submodule, synchronous syndrome module, automatic gain control submodule, OFDM demodulation submodule, difference quadrature phase shift keying demodulation submodule, frequency and time deinterleaving submodule, the convolutional code decoder submodule, energy removes to disturb submodule, cyclic redundancy code detection check submodule links to each other successively, the synchronous submodule of OFDM respectively with I/Q demodulation submodule, synchronous syndrome module, OFDM demodulation submodule links to each other, multiplexed configuration information decoder submodule respectively with difference quadrature phase shift keying demodulation submodule, frequency and time deinterleaving submodule, the convolutional code decoder submodule, energy removes to disturb submodule and links to each other.
Further, described hard soft interface module is USB (universal serial bus), peripheral component interconnect interface or PC memory card international association interface.
Further, described USB (universal serial bus) is supported the USB2.0 standard.
Further, described baseband processing module supports that piece reads in and the piece playback mode.
Further, the data flow of described read in mode is the signal data that every 24ms reads in 57.6K～1.5Mbit.
Further, the data flow of described playback mode is the signal data of every 24ms output 192bit～43Kbit.
Beneficial effect of the present invention is: the baseband processing module function is realized by the software radio mode, at different audio broadcastings and TV signal, its baseband processing module only need be developed corresponding channel-decoding, demodulation software and get final product, and has greatly reduced costs such as chip flow, manufacturing.
In addition, when technology upgrading, only need to increase a new software module and carry out software upgrading, also do not need flow, manufacturing etc. again, greatly reduced upgrade cost with programmed method.
In addition,, need not consider chip power consumption problem because baseband processing module designs outside and counts operation in, the Receiver Module of front end, the ADC module can be used low-cost manufacturing process instead, has reduced the realization difficulty.
Description of drawings
Fig. 1 is the theory diagram of existing peripheral hardware computer socket;
Fig. 2 is the theory diagram of peripheral hardware computer socket of the present invention;
Fig. 3 is the theory diagram of specific embodiments of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in detail.
Fig. 2 is the theory diagram of peripheral hardware computer socket of the present invention.As shown in Figure 2, digital multimedia receiver comprises hardware components and software section, and hardware components comprises Receiver Module, is used for received RF signal; The ADC module is a digital signal with analog signal conversion; Hard soft interface module, with digital data transmission to the peripheral hardware computer, described hard soft interface module connection hardware part and software section, be plugged on the peripheral hardware computer, can be USB (USB) interface, peripheral component interconnection (PCI) interface, PC memory card international association (PCMCIA) interface etc.; The peripheral hardware computer is used for operating software module partly, and software section comprises baseband processing module, is used for decoding, the demodulation of channel; The signaling parsing module is used for decomposing, resolving video and audio signal; Video and audio decoder module are used for decoded video and audio signal respectively; Human-machine interface module is used to realize the broadcast of video and audio frequency, also is the demonstration of image and the output of sound.
Above-mentioned module is consistent with existing peripheral hardware computer socket with function, but the present invention realizes baseband processing module with the software radio mode, and it is belonged to software section.
Fig. 3 is the theory diagram of specific embodiments of the invention.As shown in Figure 3, Receiver Module and ADC module are identical with preceding two modules among Fig. 2 respectively.The USB module is hard soft interface module, in this specific embodiment, adopts USB interface, but hard soft interface module is not limited to USB interface.Frame 1 promptly is a baseband processing module.It is the signaling parsing module that subchannel is selected module, be used for decomposing, resolving video and audio signal, above-mentioned two signals are divided into different subchannels to be handled, certainly some signal has only video data or voice data, for example MPEG-1 Layer II, MPEG-2 Layer II signal all only comprise voice data, then the data volume of video subchannel is zero, and vice versa.Frame 2 is video and audio decoder module, and similarly, some signal has only video data or voice data, then only corresponding data is decoded.
Above-mentioned baseband processing module comprises I/Q demodulation submodule, and the data parsing that USB interface is read in is I road and the Q circuit-switched data behind the quadrature sampling; The syndrome module is used to correct baseband signal data frequency deviation and time deviation synchronously; OFDM (OFDM, Orthogonal Frequency DivisionMultiplexing) is submodule synchronously, is used to calculate the estimated value of the correct amount of synchronous syndrome module; Automatic gain control (AGC) submodule carries out automatic gain control to baseband signal; OFDM demodulation submodule is used for the demodulation conversion of the OFDM of baseband signal; DQPSK (DQPSK, Differential Quadrature Phase Shift Keying) demodulation submodule is used for the demodulation to the difference quadrature phase shift signal; Frequency and time deinterleaving submodule are used to separate frequency interlacing and conciliate time-interleaved; The convolutional code decoder submodule is used for the decoding of convolution code, restores the preceding signal data of transmitting terminal convolutional encoding; Energy removes to disturb submodule, is used to remove the scrambler of energy dissipation, restores the preceding signal data of transmitting terminal energy dissipation; Multiplexed configuration information (MCI) decoder submodule is for the decoding of Traffic Channel provides basic parameter configuration; Cyclic redundancy code detects (CRC) syndrome module, is used for the CRC check of signal.Wherein, I/Q demodulation submodule, synchronous syndrome module, automatic gain control submodule, OFDM demodulation submodule, difference quadrature phase shift keying demodulation submodule, frequency and time deinterleaving submodule, the convolutional code decoder submodule, energy removes to disturb submodule, cyclic redundancy code detection check submodule links to each other successively, the synchronous submodule of OFDM respectively with I/Q demodulation submodule, synchronous syndrome module, OFDM demodulation submodule links to each other, MCI decoder submodule respectively with difference quadrature phase shift keying demodulation submodule, frequency and time deinterleaving submodule, the convolutional code decoder submodule, energy removes to disturb submodule and links to each other.
The signal trend of this specific embodiment is: after hardware components and peripheral hardware computer power on, enter the ADC module continuously through the data after the Receiver Module down-conversion, carry out digital-to-analogue conversion; Data after the conversion are stored in the internal buffer of peripheral hardware computer according to the mode process USB interface of certain speed with bit stream; The software-based tape handling application program of moving on the peripheral hardware computer also is that baseband processing module carries out the I/Q demodulation to the bit stream that receives, and resolves into I, Q data; I, Q data are carried out same step calibration, calibrate frequency, time location in the bit stream, and carry out corresponding algorithm compensation; Data after the calibration are done gain adjustment by the AGC module; After the processing of OFDM demodulation module, can decomposite the required original input data stream of baseband decoding; Original input data stream is carried out the DQPSK demodulation, carry out the deinterleaving of frequency and time according to the type of channel and handle; To the data after handling carry out convolutional code decoder, energy goes to disturb and CRC check, finishes the function of baseband processing module.It all is to carry out under the control of MCI decoder module that described DQPSK demodulation, convolutional code decoder, energy go to disturb with CRC check.After Base-Band Processing was finished, data were selected through subchannel, and video and audio signal is resolved, and resolved into different subchannels and handled, and inputed to the video and the audio decoder module of frame 2 again.Video and audio decoder module can be various ways, as Motion Picture Experts Group (MPEG) decoder, H.264 decoder or other third party's app decoders carry out the decoding of video, audio frequency, decoded data input to MMI module (Fig. 3 is not shown), realize the broadcast of video and audio frequency.
The data throughout of this specific embodiment is bigger.Existing ADC module generally is the conversions of 8 figure place moulds, and when sampling clock was 8.192MHz, net data rate was 65.536Mbps.Because synchronization header (Sync Header) and CRC check in the USB interface transmission need increase overhead, then the data traffic of USB interface is approximately 100Mbps.The transfer clock of USB1.0 standard definition is 1.5MHz, and maximum transmission rate is 1.5Mbps in theory; The transfer clock of USB1.1 standard definition is 12MHz, and maximum transmission rate is 12Mbps in theory; The transfer clock of USB2.0 standard definition is 480MHz, and maximum transmission rate is 480Mbps in theory, greater than desired 100Mbps.So in this specific embodiment, require the peripheral hardware USB interface of computer to support the USB2.0 standard.
In addition, baseband processing module can support piece to read in the mode of reading with piece, can effectively reduce the occupation rate of the system bus of externally establishing computer.After corresponding registers was set, in the importation of baseband processing module, the mode of reading in piece was read in the data flow of USB interface.Every 24ms can read in the signal data of 57.6K～1.5Mbit.In this specific embodiment, because sampling clock is 8.192MHz, the data that then every 24ms can read in 8.192MHz * 24ms * 8bit=1.5M bit are carried out channel demodulation, decoding processing.And at the output of baseband processing module, also can export subchannel with the mode that piece is read to and select module.The size of every 24ms output block is according to real needs, generally between 192bit～43Kbit.
The above is preferred embodiment of the present invention only, is not limited to the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1, a kind of digital multimedia receiver comprises at least
Receiver Module, received RF signal;
The analog digital modular converter is a digital signal with analog signal conversion;
Hard soft interface module, with digital data transmission to the peripheral hardware computer;
The peripheral hardware computer, operation signaling parsing module, video and audio decoder module and human-machine interface module is characterized in that on the described peripheral hardware computer, also move baseband processing module on the described peripheral hardware computer,
Radiofrequency signal is after Receiver Module receives, successively after analog digital modular converter, hard soft interface module, baseband processing module, signaling parsing module, video and audio decoder resume module, input to human-machine interface module, realize the broadcast of video and audio frequency.
2, digital multimedia receiver as claimed in claim 1 is characterized in that, described baseband processing module comprises at least
I/Q demodulation submodule, the data parsing that is used for that hard soft interface is read in are I road and the Q circuit-switched data behind the quadrature sampling;
The syndrome module is used to correct baseband signal data frequency deviation and time deviation synchronously;
The synchronous submodule of OFDM is used to calculate the estimated value of the correct amount of synchronous syndrome module;
Automatic gain control submodule is used for baseband signal is carried out automatic gain control;
OFDM demodulation submodule is used for the demodulation conversion of the OFDM of baseband signal;
DQPSK demodulation submodule is used for the demodulation to the difference quadrature phase shift signal;
Frequency and time deinterleaving submodule are used to separate frequency interlacing and conciliate time-interleaved;
The convolutional code decoder submodule is used for the decoding of convolution code, restores the preceding signal data of transmitting terminal convolutional encoding;
Energy removes to disturb submodule, is used to remove the scrambler of energy dissipation, restores the preceding signal data of transmitting terminal energy dissipation;
Multiplexed configuration information decoder submodule is used to the decoding of Traffic Channel that basic parameter configuration is provided;
Cyclic redundancy code detection check submodule is used for the cyclic redundancy code detection check of signal,
Wherein, I/Q demodulation submodule, syndrome module, automatic gain control submodule, OFDM demodulation submodule, difference quadrature phase shift keying demodulation submodule, frequency and time deinterleaving submodule, convolutional code decoder submodule, energy remove to disturb submodule, cyclic redundancy code detection check submodule and link to each other successively synchronously
The synchronous submodule of OFDM links to each other with I/Q demodulation submodule, synchronous syndrome module, OFDM demodulation submodule respectively,
Multiplexed configuration information decoder submodule removes to disturb submodule and links to each other with difference quadrature phase shift keying demodulation submodule, frequency and time deinterleaving submodule, convolutional code decoder submodule, energy respectively.
3, digital multimedia receiver as claimed in claim 1 or 2 is characterized in that, described hard soft interface module is USB (universal serial bus), peripheral component interconnect interface or PC memory card international association interface.
4, digital multimedia receiver as claimed in claim 3 is characterized in that, described USB (universal serial bus) is supported the USB2.0 standard.
5, digital multimedia receiver as claimed in claim 1 or 2 is characterized in that, described baseband processing module supports that piece reads in and the piece playback mode.
6, digital multimedia receiver as claimed in claim 5 is characterized in that, the data flow of described read in mode is the signal data that every 24ms reads in 57.6K～1.5Mbit.
7, digital multimedia receiver as claimed in claim 5 is characterized in that, the data flow of described playback mode is the signal data of every 24ms output 192bit～43Kbit.
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| CNA2007100374739A CN101014103A (en) | 2007-02-13 | 2007-02-13 | Digital multimedia reception device |
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| CNA2007100374739A CN101014103A (en) | 2007-02-13 | 2007-02-13 | Digital multimedia reception device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101052058B (en) * | 2007-05-17 | 2010-06-16 | 中兴通讯股份有限公司 | Processing method for base band digital signal of mobile multi-media program |
| CN101566731B (en) * | 2008-04-21 | 2011-11-16 | 国民技术股份有限公司 | Mobile video glasses integrated with CMMB receiving module |
| CN102324949A (en) * | 2011-09-13 | 2012-01-18 | 深圳桑菲消费通信有限公司 | Mobile communication terminal |
| CN102740085A (en) * | 2012-06-26 | 2012-10-17 | 上海屹芯微电子有限公司 | Composite video broadcast signal decoding device and method with time division multiplexing |
| WO2012167421A1 (en) * | 2011-06-07 | 2012-12-13 | 天津海润恒通高性能计算系统科技有限公司 | Method and device for processing signals in heterogeneous software defined radio system with personal computer based structure |
| CN101697640B (en) * | 2009-10-10 | 2015-05-06 | 赵明 | Software radio-based wireless communication customer premises equipment |
| CN107888214A (en) * | 2017-11-15 | 2018-04-06 | 四川阵风科技有限公司 | Electronic equipment and audio frequency broadcast system |
| CN107919925A (en) * | 2017-11-15 | 2018-04-17 | 四川阵风科技有限公司 | Radio monitoring device and system |
| CN111131141A (en) * | 2019-09-30 | 2020-05-08 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Voice encryption and decryption method and device |
| CN112001460A (en) * | 2020-07-16 | 2020-11-27 | 中国科学院微电子研究所 | Signal processing method and device and RFID system |
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- 2007-02-13 CN CNA2007100374739A patent/CN101014103A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101052058B (en) * | 2007-05-17 | 2010-06-16 | 中兴通讯股份有限公司 | Processing method for base band digital signal of mobile multi-media program |
| CN101566731B (en) * | 2008-04-21 | 2011-11-16 | 国民技术股份有限公司 | Mobile video glasses integrated with CMMB receiving module |
| CN101697640B (en) * | 2009-10-10 | 2015-05-06 | 赵明 | Software radio-based wireless communication customer premises equipment |
| WO2012167421A1 (en) * | 2011-06-07 | 2012-12-13 | 天津海润恒通高性能计算系统科技有限公司 | Method and device for processing signals in heterogeneous software defined radio system with personal computer based structure |
| CN102324949A (en) * | 2011-09-13 | 2012-01-18 | 深圳桑菲消费通信有限公司 | Mobile communication terminal |
| CN102324949B (en) * | 2011-09-13 | 2013-12-25 | 深圳桑菲消费通信有限公司 | Mobile communication terminal |
| CN102740085A (en) * | 2012-06-26 | 2012-10-17 | 上海屹芯微电子有限公司 | Composite video broadcast signal decoding device and method with time division multiplexing |
| CN102740085B (en) * | 2012-06-26 | 2015-05-27 | 上海屹芯微电子有限公司 | Composite video broadcast signal decoding device and method with time division multiplexing |
| CN107888214A (en) * | 2017-11-15 | 2018-04-06 | 四川阵风科技有限公司 | Electronic equipment and audio frequency broadcast system |
| CN107919925A (en) * | 2017-11-15 | 2018-04-17 | 四川阵风科技有限公司 | Radio monitoring device and system |
| CN107888214B (en) * | 2017-11-15 | 2020-02-21 | 四川阵风科技有限公司 | Electronic equipment and audio playing system |
| CN107919925B (en) * | 2017-11-15 | 2021-06-25 | 四川阵风科技有限公司 | Radio monitoring device and system |
| CN111131141A (en) * | 2019-09-30 | 2020-05-08 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Voice encryption and decryption method and device |
| CN111131141B (en) * | 2019-09-30 | 2022-04-29 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Voice encryption and decryption method and device |
| CN112001460A (en) * | 2020-07-16 | 2020-11-27 | 中国科学院微电子研究所 | Signal processing method and device and RFID system |
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