CN200950599Y - Digital broadcast receiving apparatus and system - Google Patents
Digital broadcast receiving apparatus and system Download PDFInfo
- Publication number
- CN200950599Y CN200950599Y CN 200620114963 CN200620114963U CN200950599Y CN 200950599 Y CN200950599 Y CN 200950599Y CN 200620114963 CN200620114963 CN 200620114963 CN 200620114963 U CN200620114963 U CN 200620114963U CN 200950599 Y CN200950599 Y CN 200950599Y
- Authority
- CN
- China
- Prior art keywords
- signal
- digital
- unit
- decoding unit
- audio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a digital broadcasting receiving device and system, which include a RF AM unit, a signal decoding unit, a data business decoding unit, a micro-control unit and an audio output unit. The RF AM unit is used to receive digital audio broadcasting and/or digital multimedia broadcasting signals, process the received signals, and transmit the processed signals to the signal decoding unit. The signal decoding unit decodes the received signals and transmits the decoded data separately to the audio output unit and the data business decoding unit. The audio output unit plays the analogue audio signals. The data business decoding unit decodes the received data and generates to-be-output parallel digital signals. The micro-control unit is separately communicated with the RF AM unit, the signal decoding unit and the data business decoding unit and controls the units so as to receive digital broadcasting signals and output high-quality multimedia signals.
Description
Technical field
The utility model relates to the digital broadcasting technical field, and the particularly reception of digital broadcasting is a kind of digital broacast receiver and system concretely.
Background technology
DMB (DMB:Digital Multimedia Broadcasting) grows up from digital audio broadcasting (DAB), this standard designs at audio frequency, data and the video of mobile device transmission CD quality, difference according to transmission means has digital multimedia broadcast (dmb) via satellite (SDMB, Satellite Digital Multimedia Broadcasting) and two kinds of standards of T-DMB (TDMB, Terrestrial Digital Multimedia Broadcasting).
Along with popularizing rapidly of cellphone multimedia business, and digital television techniques and networks development, mobile TV becomes the topic an of the supreme arrogance of a person with great power at home gradually.From present applicable cases, the implementation of mobile TV mainly can be divided into following several:
First kind of mode that is based on terrestrial broadcasting comprises DVB-H (Digital VideoBroadcasting-Handheld) technology in Europe, T-DMB (Terrestrial-DigitalMultimedia Broadcasting) technology of Korea S etc.;
Second kind of mode that is based on satellite transmission comprises the S-DMB (Satellite DigitalMultimedia Broadcasting) of Korea S and SDMB (the Satellite Digital MultimediaBroadcasting) technology in Europe;
The third then is based on multimedia broadcast multicast (MBMS:MultimediaBroadcast/Multicast Service) technology and the stream media technology of mobile network 3GPP.
In addition, also have a kind of very important techniques to be and irrelevant OMA BCAST (the OpenMobile Alliance Mobile Broadcast Services) standard of bearer network.
Wherein, the DVB-H technology is because its good support to portable equipment receiving digital broadcast TV signal such as mobile phones, merged advantage and the ripe teller system of mobile network and the advantage that personalized order program service can be provided of the low-cost high bandwidth of radio network simultaneously based on the solution of this technology, adopted by more and more countries and area.Countries such as Finland, Britain, Germany, France, Switzerland, the U.S. have begun the mobile phone TV services test based on DVB-H at present, and wherein the mobile phone TV services of Finland have entered the commercial test operation stage.In addition, ground such as Italy, Holland, Sweden, Australia, TaiWan, China are also carrying out the preparation of DVB-H test.DVB-H has possessed the condition of large-scale commercial applications operation as a mobile TV technical standard.
Though compare with existing broadcasting, DAB/DMB have tonequality good (CD quality) but, can realize that multimedia receives that high-speed mobile receives, can encrypt, transmitting power is little, area coverage is big, the availability of frequency spectrum is high, very strong ability anti-interference and that receive is arranged under adverse circumstances, and can utilize satellite to increase substantially the advantages such as coverage rate of broadcasting, but how digital broadcast signal is received, and to make it are problem demanding prompt solutions with high-quality service in users.
The utility model content
The purpose of this utility model is to provide a kind of digital broacast receiver and system, so that digital broadcast signal is received, and the multi-media signal of outputting high quality.
The technical solution of the utility model is:
A kind of digital broacast receiver comprises: tuned radio-frequency unit, signal decoding unit, data service decoding unit, micro-control unit and audio output unit; Wherein said tuned radio-frequency unit receives digital audio broadcasting signal and/or digital multimedia broadcasting signal, and the signal that receives is handled, and sends the signal after handling to described signal decoding unit; Described signal decoding unit carries out decoding processing to the signal that receives, and sends decoded data to described audio output unit and data service decoding unit respectively; Described audio output unit is play simulated audio signal; Described data service decoding unit is decoded to the data that receive, and generates parallel digital signal to be exported; Described micro-control unit is connected with described tuned radio-frequency unit, signal decoding unit, data service decoding unit respectively and controls the work of these unit.
Described signal decoding unit comprises: coded orthogonal frequency division multiplex (MUX) (COFDM) demodulator, channel decoder and information source audio decoder; Described coded orthogonal frequency division multiplex (MUX) (COFDM) demodulator carries out demodulation to the signal that receives, and sends the signal after the demodulation to described channel decoder; Described channel decoder carries out channel-decoding to the received signal, and sends the data behind the channel-decoding to described information source audio decoder and described data service decoding unit respectively; Described information source audio decoder carries out audio decoder to the data that receive, and generates output of numeral and analogue audio frequency and PAD (PAD).
Described data service decoding unit carries out decoding processing to the data that receive, and generates digital audio broadcasting to be exported (DAB) packet, is combined into digital audio broadcasting data set or IP bag.
Described digital broacast receiver also comprises: communication interface is used to export described digital audio broadcasting (DAB) packet, is combined into digital audio broadcasting data set or IP bag.
Described micro-control unit also comprises: setpoint frequency is also operated tuning sync section; Generate the rendition list display program mark part; Playing programs or select part from data-interface output; Audio decoder volume control section branch.
Described digital broacast receiver also comprises: the display that is connected with described micro-control unit and input keyboard and power supply.
The utility model also provides a kind of digital broadcast receiving system, comprising: digital broacast receiver and based on the intelligent display device of microprocessor, and described digital broacast receiver and described intelligent display device based on microprocessor are for communicating to connect; Wherein said digital broacast receiver comprises: tuned radio-frequency unit, signal decoding unit, data service decoding unit, micro-control unit, audio output unit and communication interface; Described tuned radio-frequency unit receives digital audio broadcasting signal and/or digital multimedia broadcasting signal, and the signal that receives is handled, and sends the signal after handling to described signal decoding unit; Described signal decoding unit carries out decoding processing to the signal that receives, and sends decoded data to described audio output unit and data service decoding unit respectively; Described audio output unit is play simulated audio signal; Described data service decoding unit is decoded to the data that receive, and generates parallel digital signal; Described communication interface is used to export described parallel digital signal; Described micro-control unit respectively with described tuned radio-frequency unit, signal decoding unit, data service decoding unit, communication interface is connected and control the work of these unit and interface; Described intelligent display device based on microprocessor is used to receive described parallel digital signal, and the signal that receives is handled and play.
Described communication interface is the USB mouth; Described intelligent display device based on microprocessor comprises: desktop computer, notebook computer, mobile phone, PDA.
The beneficial effects of the utility model are, by a kind of digital broacast receiver and system are provided, realized digital broadcast signal is received, and directly or by the multi-media signal based on the intelligent display device outputting high quality of microprocessor such as computer, mobile phone, PDA.
Description of drawings
Fig. 1 is the structured flowchart of the utility model digital broacast receiver;
Fig. 2 is the control flow chart of the utility model micro-control unit;
Fig. 3 is the structured flowchart of the utility model digital broadcast receiving system;
Fig. 4 is the circuit diagram of the utility model device embodiment;
Fig. 5 is the circuit diagram that the utlity model has USB interface.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model.The utility model is digital audio/multimedia broadcasting (DAB/DMB) receiving system, this system meets the ETS300401 standard fully, constitute by receiver decoding module, Control Software, data service decoder and interface hardware plate, can realize that the reception of DAB audio frequency is play and the decoding of DMB multi-medium data business exports interface to for Computer Processing, based on this receiving system, can expand and be applicable to multi-purpose DAB/DMB receiver.
The utility model provides a kind of digital broacast receiver, comprising: tuned radio-frequency unit, signal decoding unit, data service decoding unit, micro-control unit and audio output unit; Wherein said tuned radio-frequency unit receives digital audio broadcasting signal and/or digital multimedia broadcasting signal, and the signal that receives is handled, and sends the signal after handling to described signal decoding unit; Described signal decoding unit carries out decoding processing to the signal that receives, and sends decoded data to described audio output unit and data service decoding unit respectively; Described audio output unit is play simulated audio signal; Described data service decoding unit is decoded to the data that receive, and generates parallel digital signal to be exported; Described micro-control unit is connected with described tuned radio-frequency unit, signal decoding unit, data service decoding unit respectively and controls the work of these unit.
This device mainly partly is made of receiver decoding module, embedded Control software, data service decoder etc., referring to Fig. 1.
1. tuned radio-frequency, under the situation of DAB transmission mode I, the DAB/DMB signal of VHF wave band enters tuner through antenna, control the radiofrequency signal in the 174MHz-240MHz scope after selecting through tuner control circuit, become intermediate-freuqncy signal (centre frequency is 38.912MHz, and bandwidth is the frequency chunks of 1.536MHz).By intermediate frequency selective filter (for example Surface Acoustic Wave Filter) filtering, filter useless portions of the spectrum, even adjacently also can well receive under the disturbed condition frequently strong guaranteeing.Then intermediate-freuqncy signal is again through frequency translation and filtering, and becoming centre frequency is 2.048MHz, and bandwidth is still sent into the COFDM demodulator for the baseband signal of 1.536MHz and continued to handle.
2. COFDM demodulation and channel-decoding, the COFDM demodulator at first produces in-phase component (I) and quadrature component (Q) signal by quadrature demodulation from the COFDM baseband signal, after the AD conversion, become the signal of digital form, again through fast Fourier transform (FFT), finish the 4-DPSK demodulation of each carrier wave, recover the differential coding plural number bit that is distributed on each carrier wave (or dibit, bit to) data flow.The detailed process process of channel-decoding has: receiver is (finding out nil symbol) synchronously; Demultiplexing (comprising synchronizing channel SC, fast information channel in dab receiver FIC, MSC MSC data); Time de-interweaving and frequency deinterleaving; Veterbi decoding (deconvolution coding); Descrambling (separating energy dissipation) etc.
3. information source audio decoder, from above-mentioned demultiplexing, after finishing, the FIC decoding can carry out the service selection of DAB/DMB, after wherein selecting audio service, then should business and PAD (PAD) send into audio decoder and carry out audio decoder (MUSICAM source coding), produce numeral and analogue audio frequency and export and the PAD data.
4. data decode, and all business (comprising audio service and the data service) data behind the aforementioned channel-decoding can be sent into data decoder by the serial digital signal of RDI (RDI) form and decode (the data service data filter and the processing of pack mode), produce parallel (8) digital signal output of desired data at last.
5. system's master control (referring to Fig. 4), above-mentioned all processes are controlled by bus by microcontroller, the embedded software major function of moving on the microcontroller is the work and the man-machine interface of control tuner, channel decoder and audio decoder, realizes decoding control and professional broadcast of DAB/DMB.
Described embedded Control software mainly contains following function:
Setpoint frequency is also operated tuning Synchronization Control process, arrives the DAB signal stabilization and receives;
The FIB decoding generates the rendition list (comprising audio frequency and data service), the display program mark;
Select playing programs or export from the RDI interface;
The control of audio decoder volume;
For the RS232 interface provides api command collection funcall;
The work of control channel decoder is as quiet etc.
For ease of being transplanted to all kinds of microcontroller platforms, this embedded Control software adopts the C language compilation, can be under the DOS environment artificial debugging.
As shown in Figure 2, be control flow of the present utility model, that is:
1) initialization (Initialization)
AT91SAM7S64 MCU initialization;
LCD control and keyboard initialization (LCD Controller ﹠amp; Key PAD).
2) main screen (Main Screen)
Automatic frequency scanning (Automatic Frequency Scanning);
Manual frequency scanning (Manual Frequency Scanning);
Frequency meter is selected (Frequency table Selection);
Initial value (Initialization) is set.
3) frequency meter (Frequency Tables)
Wave band-III (Band-III).
4) automatic scan (Auto Scanning)
Program and ensemble scanning (Ensemble Scanning);
Service and the service component analyzed according to FIC scan (Service; Service ComponentScanning by FIC parsing);
Service component is selected and demonstration (Service Component select and display).
5) manual scanning (Manual Scanning)
Program and ensemble scanning (Ensemble Scanning);
Service and the service component analyzed according to FIC scan (Service; Service ComponentScanning by FIC parsing);
Service component is selected and demonstration (Service Component select and display).
6) ITD3010+PN3020 chip operation (Chip Operating)
ITD3010 ﹠amp; PN3020 chip register initialization (Chip Register Initialization);
Tuner ﹠amp; (Lock Check) checked in the OFDM locking;
WOLFSON audio frequency DAC starts (Audio DAC Enable).
7) information on services (Service Information)
Frequency information (Frequency Information);
Program and ensemble sign (Ensemble Label);
Service mark (Service Label);
Program category (Program Type);
Dynamic symbol service (DLS:Dynamic Label Service).
8) chip status (Chip Status)
DAB pattern (DAB Mode);
Signal quality (Signal Quality), (0～100level);
Signal to noise ratio (snr), (0～20dB);
Crc error (Error);
Channel error rate (CER:Channel Error Rate).
9) audio-frequency information and control (Audio Information ﹠amp; Control)
Audio coding sign indicating number C (Audio Encoding Codec);
Audio mode (Audio Mode);
Bit rate (Bit Rate);
Sample rate (Sampling Rate);
Sound control (Volume Control).
The utility model also provides a kind of digital broadcast receiving system, comprising: digital broacast receiver and based on the intelligent display device of microprocessor, and described digital broacast receiver and described intelligent display device based on microprocessor are for communicating to connect; Wherein said digital broacast receiver comprises: tuned radio-frequency unit, signal decoding unit, data service decoding unit, micro-control unit, audio output unit and communication interface; Described tuned radio-frequency unit receives digital audio broadcasting signal and/or digital multimedia broadcasting signal, and the signal that receives is handled, and sends the signal after handling to described signal decoding unit; Described signal decoding unit carries out decoding processing to the signal that receives, and sends decoded data to described audio output unit and data service decoding unit respectively; Described audio output unit is play simulated audio signal; Described data service decoding unit is decoded to the data that receive, and generates parallel digital signal; Described communication interface is used to export described parallel digital signal; Described micro-control unit respectively with described tuned radio-frequency unit, signal decoding unit, data service decoding unit, communication interface is connected and control the work of these unit and interface; Described intelligent display device based on microprocessor is used to receive described parallel digital signal, and the signal that receives is handled and play.
As shown in Figure 3, DAB﹠amp; DMB DMB receiving system is made up of two parts: digital broadcast signal receiving apparatus and operate in various based on microprocessor smart machine or digital audio, video and the various data service decoding software in the device.Connect by USB universal serial bus standard between two parts.Wherein, the DMB receiving system is made up of three parts, i.e. digital broadcast signal receiver module, USB interface and video, audio frequency, data decode and broadcast display device.Connect by the USB serial bus interface between digital broadcast signal receiver module and decoding and the broadcast display device, carry out data and transmit and control.Wherein:
The receiver decoding module: the receiver decoding module of native system, adopt international DAB channel-decoding and the audio decoder chip that meets the DAB standard, this module can provide the DAB/DMB decoding function, produces analog-and digital-audio frequency output and RDI output.This module is by the embedded Control software control that moves on the microcontroller, and by the RS232 interface on the microcontroller, also can realize the command level control to this module.
The data service decoder: the data service decoder can filter out needed data service partial decoding of h in the code stream behind the channel-decoding, sends into Computer Processing.This decoder combines with the receiver decoding module, can realize the reception of multi-medium data business.This decoder can be realized real-time processing, the efficient height, and cost is low, good stability.
This decoder is by receiving the RDI output signal of aforementioned receiver decoding module, at first the RDI output transform is become the I2S signal, according to RDI standard (EN20255), find among the FIB (FIB) in the RDI frame parameter about pack mode (packet mode) data service and its corresponding subchannel (SubChannnel), with the useful data output of subchannel in MSC (MSC) of finding out, all the other invalid datas filter out again.At different application, this decoder is also further handled the bag among the MSC, can realize three kinds of other outputs of level: i.e. directly output of DAB packet (packet) is combined into DAB data set (data group) output, the directly output of IP bag.The useful data of decoding output can be sent into PC and carry out the types of applications processing through all kinds of computer interfaces such as USB.
All kinds of interface board for computers such as USB (referring to Fig. 5): all kinds of interface boards such as USB are mainly realized the Data Receiving of data service decoder, and the data that are packaged into USB bag or other interface format are delivered to Computer Processing.Under USB-WDM driver control, reception that can the professional decoder dateout of control data, and can preserve and be for further processing.Consider the extensive employing of USB interface, if with this interface board and aforementioned decoder module and data decoder combination, on USB controller (all embedded microcontroller of majority), draw a RS232 interface, just can develop the product of directly controlling whole DAB/DMB receiver system easily from USB interface.
Embedded Control software mainly contains following function:
Setpoint frequency is also operated tuning Synchronization Control process, arrives the DAB signal stabilization and receives;
The FIB decoding generates the rendition list (comprising audio frequency and data service), the display program mark;
Select playing programs or export from the RDI interface;
The control of audio decoder volume;
For the RS232 interface provides api command collection funcall;
The work of control channel decoder is as quiet etc.
For ease of being transplanted to all kinds of microcontroller platforms, this embedded Control software adopts the C language compilation, can be under the DOS environment artificial debugging.
Compare with existing broadcasting, DAB/DMB of the present utility model has tonequality good (CD quality), can realize that multimedia receives, but high-speed mobile receives, can encrypt, transmitting power is little, area coverage is big, availability of frequency spectrum height, very strong ability anti-interference and that receive under adverse circumstances is arranged, and can utilize satellite to increase substantially the advantages such as coverage rate of broadcasting, be in the broadcasting industry development this system of new milestone by the receiver decoding module, Control Software, data service decoder and interface board constitute, can realize that the reception of DAB audio frequency is play and the decoding of multi-medium data business exports interface to for Computer Processing, based on this receiving system, can expand and be applicable to multi-purpose DAB/DMB receiver.
Above embodiment only is used to illustrate the utility model, but not is used to limit the utility model.
Claims (12)
1. a digital broacast receiver is characterized in that comprising: tuned radio-frequency unit, signal decoding unit, data service decoding unit, micro-control unit and audio output unit; Wherein
Described tuned radio-frequency unit receives digital audio broadcasting signal and/or digital multimedia broadcasting signal, and the signal that receives is handled, and sends the signal after handling to described signal decoding unit;
Described signal decoding unit carries out decoding processing to the signal that receives, and sends decoded data to described audio output unit and data service decoding unit respectively;
Described audio output unit is play simulated audio signal;
Described data service decoding unit is decoded to the data that receive, and generates parallel digital signal to be exported;
Described micro-control unit is connected with described tuned radio-frequency unit, signal decoding unit, data service decoding unit respectively and controls the work of these unit.
2. digital broacast receiver according to claim 1 is characterized in that, described signal decoding unit comprises: coded orthogonal frequency division multiplex (MUX) demodulator, channel decoder and information source audio decoder;
Described coded orthogonal frequency division multiplex (MUX) demodulator carries out demodulation to the signal that receives, and sends the signal after the demodulation to described channel decoder;
Described channel decoder carries out channel-decoding to the received signal, and sends the data behind the channel-decoding to described information source audio decoder and described data service decoding unit respectively;
Described information source audio decoder carries out audio decoder to the data that receive, and generates output of numeral and analogue audio frequency and PAD.
3. digital broacast receiver according to claim 1 and 2 is characterized in that, described parallel digital signal to be exported is meant: be the digital audio broadcasting packet, be combined into digital audio broadcasting data set or IP bag.
4. digital broacast receiver according to claim 3 is characterized in that also comprising: communication interface is used to export described digital audio broadcasting packet, is combined into digital audio broadcasting data set or IP bag.
5. digital broacast receiver according to claim 4 is characterized in that, described micro-control unit also comprises:
Setpoint frequency is also operated tuning sync section;
Generate the rendition list display program mark part;
Playing programs or select part from data-interface output;
Audio decoder volume control section branch.
6. digital broacast receiver according to claim 1 or 5 is characterized in that also comprising: the display that is connected with described micro-control unit and input keyboard and power supply.
7. digital broadcast receiving system is characterized in that comprising: digital broacast receiver and based on the intelligent display device of microprocessor, and described digital broacast receiver and described intelligent display device based on microprocessor are for communicating to connect; Wherein
Described digital broacast receiver comprises:
Tuned radio-frequency unit, signal decoding unit, data service decoding unit, micro-control unit, audio output unit and communication interface;
Described tuned radio-frequency unit receives digital audio broadcasting signal and/or digital multimedia broadcasting signal, and the signal that receives is handled, and sends the signal after handling to described signal decoding unit;
Described signal decoding unit carries out decoding processing to the signal that receives, and sends decoded data to described audio output unit and data service decoding unit respectively;
Described audio output unit is play simulated audio signal;
Described data service decoding unit is decoded to the data that receive, and generates parallel digital signal;
Described communication interface is used to export described parallel digital signal;
Described micro-control unit respectively with described tuned radio-frequency unit, signal decoding unit, data service decoding unit, communication interface is connected and control the work of these unit and interface;
Described intelligent display device based on microprocessor is used to receive described parallel digital signal, and the signal that receives is handled and play.
8. digital broadcast receiving system according to claim 7 is characterized in that, described signal decoding unit comprises: coded orthogonal frequency division multiplex (MUX) demodulator, channel decoder and information source audio decoder;
Described coded orthogonal frequency division multiplex (MUX) demodulator carries out demodulation to the signal that receives, and sends the signal after the demodulation to described channel decoder;
Described channel decoder carries out channel-decoding to the received signal, and sends the data behind the channel-decoding to described information source audio decoder and described data service decoding unit respectively;
Described information source audio decoder carries out audio decoder to the data that receive, and generates output of numeral and analogue audio frequency and PAD.
9. according to claim 7 or 8 described digital broadcast receiving systems, it is characterized in that described parallel digital signal is meant: the digital audio broadcasting packet, be combined into digital audio broadcasting data set or IP bag.
10. digital broadcast receiving system according to claim 9 is characterized in that, described data service decoding unit also comprises: data-interface is used to export described digital audio broadcasting packet, is combined into digital audio broadcasting data set or IP bag.
11. digital broadcast receiving system according to claim 10 is characterized in that, described micro-control unit also comprises:
Setpoint frequency is also operated tuning sync section;
Generate the rendition list display program mark part;
Playing programs or select part from data-interface output;
Audio decoder volume control section branch.
12., it is characterized in that described communication interface is the USB mouth according to claim 7 or 11 described digital broadcast receiving systems;
Described intelligent display device based on microprocessor comprises: desktop computer, notebook computer, mobile phone, PDA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620114963 CN200950599Y (en) | 2006-05-17 | 2006-05-17 | Digital broadcast receiving apparatus and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620114963 CN200950599Y (en) | 2006-05-17 | 2006-05-17 | Digital broadcast receiving apparatus and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200950599Y true CN200950599Y (en) | 2007-09-19 |
Family
ID=38893142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620114963 Expired - Fee Related CN200950599Y (en) | 2006-05-17 | 2006-05-17 | Digital broadcast receiving apparatus and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200950599Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106375053A (en) * | 2016-08-31 | 2017-02-01 | 合肥同益信息科技有限公司 | Intelligent public broadcasting system |
-
2006
- 2006-05-17 CN CN 200620114963 patent/CN200950599Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106375053A (en) * | 2016-08-31 | 2017-02-01 | 合肥同益信息科技有限公司 | Intelligent public broadcasting system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1252989C (en) | Mobile terminal receiving multimedia television broadcasting | |
| CN101047840A (en) | Channel interleaving method and system in hand TV system | |
| CN1697499A (en) | Apparatus and method for receiving digital multimedia broadcasting in a wireless terminal | |
| CN1791161A (en) | Method and system for communicating with multi communication nets | |
| CN1791164A (en) | Method and system for communicating with multi communication nets | |
| CN1187920C (en) | Digital broadcast receiver | |
| CN1897658A (en) | Webpage requesting multi-medium applied system and realization for one-way network | |
| CN1700622A (en) | Method for searching available frequency band used in digital broadcast receiving and retransmitting device | |
| CN1825968A (en) | Receiving and transmitting method for digital mobile broadcasting TV and terminal therefor | |
| CN1309246C (en) | Access device and realizing method based on CI interface of ground and satellite diyital television | |
| CN1665178A (en) | Digital audio/multimedia broadcasting receiver | |
| CN1272732A (en) | Receiver for digital voice-frequency broadcasting | |
| CN101047807A (en) | Display/response system, apparatus and program storage medium | |
| CN200950599Y (en) | Digital broadcast receiving apparatus and system | |
| CN101459481A (en) | General purpose radio for amplitude modulation, frequency modulation and DRM | |
| CN1905683A (en) | Dmb assembly and mobile terminal and method for receiving broadcast data | |
| CN105072265A (en) | Mobile terminal with China digital radio broadcasting (CDR) receiving function | |
| CN101262571A (en) | A decoding method for digital multimedia broadcast receiver | |
| CN1710842A (en) | Digital broadcast receiver capable of converting radio-wave mode output | |
| CN101051295A (en) | Method for broadcasting cell phone received radio station broadcast signal on computer | |
| CN101043620A (en) | TV program transmission method and apparatus | |
| CN1794592A (en) | Portable terminal possessing digital audio broadcasting (DAB) receiving function | |
| CN1825966A (en) | Apparatus and method for controlling image quality and sound field in digital format broadcasting | |
| CN201039216Y (en) | Digital multi-media broadcast receiving and transmission device based on quick card interface | |
| CN204967944U (en) | Mobile terminal with china digital audio broadcasting (CDR) receives function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070919 Termination date: 20150517 |
|
| EXPY | Termination of patent right or utility model |