CN105072265A - Mobile terminal with China digital radio broadcasting (CDR) receiving function - Google Patents
Mobile terminal with China digital radio broadcasting (CDR) receiving function Download PDFInfo
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- CN105072265A CN105072265A CN201510456848.XA CN201510456848A CN105072265A CN 105072265 A CN105072265 A CN 105072265A CN 201510456848 A CN201510456848 A CN 201510456848A CN 105072265 A CN105072265 A CN 105072265A
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Abstract
The present invention relates to a mobile terminal with a China digital radio broadcasting (CDR) receiving function. The mobile terminal comprises a control module which controls the mobile terminal and also comprises a memory module, a man-machine interface, an audio processing module and a power supply module which are connected to the control module, an RF module which is connected to the control module, a CDR module which is connected to the RF module and receives a digital radio broadcasting signal sent by the RF module and sends the processed digital radio broadcasting signal to the audio processing module to play the signal in a speaker under the control of the control module.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to the mobile terminal that one has Chinese Digital audio broadcasting (CDR) receiving function.
Background technology
Chinese Digital audio broadcasting (ChinaDigitalRadio, CDR) technology is the ground third generation broadcast technology that grows up after AM and FM audio broadcasting technology, it combines the channel coding technology of high-quality and efficient source coding technique and the transmission of anti-echo, has the following advantages:
Transmission system performance is good, and can eliminate the accumulation of noise in transmitting procedure and distortion, the mistake occurred in transmission can be corrected; Required transmitting power is little, is conducive to energy savings and reduces electromagnetic pollution; Transmission system allows Synchronization Network to run, and improves spectrum utilization rule, is beneficial to the broadcast realizing a channel multiple programs and multiple business; Can fixed reception, also can portable reception and mobile reception, the quality of mobile reception reaches CD-DA quality; Can provide high-quality, dual track, multichannel sterego is broadcasted, its subjective quality and CD disc indifference; Power efficiency is high; Transmitter power only has the 1/100-1/10 of FM transmitter, saves power supply and decreases environmental impact; Realize Single Frequency Network to cover, can save frequency resource, cover effective performance and reach 95%, available time is 99%; Additional information etc. can be transmitted.
Therefore, along with the development of digital information technology, digital audio broadcasting replaces current AM or FM broadcast just gradually.If the mobile terminal of user can be utilized, such as mobile phone or PDA etc., listen to digital audio broadcasting, will be very convenient, also bring larger enjoyment by life.
Summary of the invention
In view of this, the object of the present invention is to provide one to have the mobile terminal of Chinese Digital audio broadcasting (CDR) receiving function, user can utilize this mobile terminal to receive digital audio broadcasting program;
The invention provides a kind of mobile terminal with Chinese Digital audio broadcasting CDR receiving function, comprising: the control module controlling described mobile terminal; The memory module be connected with described control module, man-machine interface, audio processing modules and power module; The radio frequency module be connected with described control module, and the CDR module to be connected with described RF module, it receives the digital audio broadcasting signal that described RF module sends over, and under the control of described control module, send to described audio processing modules to play at loud speaker the digital audio broadcasting signal after process.
Preferably, described mobile terminal also comprises a LCD module of liquid crystal display be connected with control module, for carrying out video display;
Preferably, described CDR module is connected with described LCD module, sends vision signal to described LCD module;
Preferably, described mobile terminal also comprises AM/FM tuner module, and it is under the control of described control module, AM or the FM signal that reception RF module sends over also processes described signal;
Preferably, the signal that described CDR module receives is the signal of very high frequency(VHF) VHF wave band;
Preferably, the signal that described CDR module receives is the signal of L-band, and the signal of L-band is transformed to the signal of very high frequency(VHF) VHF wave band;
Preferably, described control module realizes control command process, tuning control, zero-signal detection, Synchronization Control, audio frequency control, subchannel selection by uC interface to CDR module;
Preferably, described CDR module also has CDR module data interface, realizes the exterior storage of the decoded data from CDR signal;
Preferably, described CDR module has needs optional two-way integrated circuit built-in audio bus I2C interface according to Systematical control;
Preferably, transfer of data is carried out by the digital audio interface of integrated circuit built-in audio bus I2S form between described CDR module and described apparatus for processing audio.
Contrast prior art, the invention has the advantages that,
The mobile terminal with Chinese Digital audio broadcasting (CDR) receiving function of the present invention, the correlation module carrying out digital audio broadcasting reception is added in common mobile terminal, make it except carrying out common communication function, digital audio broadcasting signal can also be received to listen to digital audio broadcasting, for user provides a new information channel, and realize one-object-many-purposes, also make multimedia technology obtain more sufficient embodiment on this equipment; In addition, device of the present invention not only can receive digital audio broadcasting signal, also can receive AM or FM signal well, and this also adapts to the trend of future digital audio broadcasting completely.
Described and other objects, features and advantages of the present invention are below in conjunction with accompanying drawing and and will become more obvious in the specific descriptions of unspecific embodiment.
Accompanying drawing explanation
Fig. 1 is the structured flowchart according to mobile terminal of the present invention;
Fig. 2 is the structured flowchart of mobile terminal according to an embodiment of the invention;
Fig. 3 is the structured flowchart of mobile terminal according to another embodiment of the present invention;
Fig. 4 is the structured flowchart of the mobile terminal according to further embodiment of this invention;
Fig. 5 is the theory diagram according to CDR module of the present invention;
Fig. 6 is the circuit diagram of the HFS in the CDR module of Fig. 5;
Fig. 7 is the circuit diagram of the COFDM demodulator in the CDR module of Fig. 5;
Fig. 8 is the circuit diagram of the source decoder in the CDR module of Fig. 5.
Embodiment
In the following description, known function or structure will no longer describe in detail, to avoid there is unnecessary obscuring with content of the present invention.
Fig. 1 is the structured flowchart according to mobile terminal of the present invention.As shown in Figure 1, control module 1 controls whole terminal normal operation, and it is the core of whole device, and what be connected with control module 1 has memory module 9, man-machine interface 8, audio processing modules 6 and power module 4; Also comprise a RF module 3 be connected with control module 1, with a CDR module 2, described CDR module 2 is connected with described RF module 3, receive the digital audio broadcasting signal that RF module 3 sends over, simultaneously, digital audio broadcasting signal after process, by the control of described control module 1, sends to described audio processing modules 6 to be used for playing at loud speaker by described CDR module 2.
Fig. 2 is the structured flowchart of mobile terminal according to an embodiment of the invention.As shown in Figure 2, control module 1 is the core of whole device, it controls the whole operation of mobile device, is connected with SIM card (SubscriberIdentityModule Subscriber Identity Module) 5, memory module 9, man-machine interface 8, audio processing modules 6, LCD module 7 and radio-frequency module 3; A power module 4 manages the power configuration of whole device; Memory module 9 be used for storing mobile device need store data; Man-machine interface 8 is man-machine interfaces of user and this device, and user has been used for the various operations of needs; The voice signal of the coding that audio processing modules 6 demodulation receives from RF module 3 also provides the voice signal of demodulation to loud speaker, and coding from microphone (not shown) electroacoustic signal and provide the voice signal of coding to RF module 3; LCD module 7 for showing the basic operation state of mobile terminal, and shows the image file in terminal.
Simultaneously, also comprise a CDR module 2, described CDR module 2 is connected with described RF module 3, receive the digital audio broadcasting signal that RF module 3 sends over, simultaneously, digital audio broadcasting signal after process, by the control of described control module 1, is sent to described audio processing modules 6, for playing at loud speaker by described CDR module 2.
Fig. 3 is the structured flowchart of mobile terminal according to another embodiment of the present invention.This enforcement is on the basis of Fig. 2, and CDR module 2 is connected with LCD module 7, for CDR module to be received and the videos such as the picture parsed show;
Fig. 4 is the structured flowchart of the mobile terminal according to further embodiment of this invention.This enforcement, on the basis of Fig. 2 and Fig. 3, comprises an AM/FM tuner module 10 further, and it is under the control of described control module 1, AM or the FM signal that reception RF module 3 sends over also processes described signal, to realize listening to AM or FM program;
Fig. 5 is the theory diagram according to CDR module of the present invention.As can be seen from Figure, be process finally provide audio broadcasting program good and data service according to forming with transmitting terminal the contrary order that transmits to the reception of CDR signal.HFS (tuner), first from the frequency range distributing to CDR use, select required transmission sound programme and the frequency chunks of data service, the combination of all business that this frequency chunks transmits is called ensemble; Then carry out frequency translation, high-frequency signal is become intermediate-freuqncy signal and baseband signal.
Fig. 6 is the circuit diagram of the HFS in the CDR module of Fig. 5.As shown in Figure 6, in order to receive the signal of L-band, need the signal signal of L-band being transformed to VHF wave band, the local oscillator of CDR module uses phase-locked loop (PLL).No matter be the VHF signal directly received or the VHF signal converted by L-band, after selecting, all send into frequency mixer, become intermediate-freuqncy signal, by the filtering of intermediate frequency selective filter, curb useless spectrum component, to guarantee namely as also can well received under strong audio frequency road disturbed condition.Then, intermediate-freuqncy signal, again through frequency translation and filtering, provides centre frequency to be the baseband signal of 2.048MHZ, sends into COFDM demodulator and continues process.
Fig. 7 is the circuit diagram of the COFDM demodulator in the CDR module of Fig. 5.CDR baseband signal sends into the COFDM demodulator shown in Fig. 6, to obtain the transmission composite signal formed by recombiner corresponding to transmitting terminal.For this reason, first from COFDM baseband signal, in-phase component (I) and quadrature component (Q) is produced by quadrature demodulator, then the signal of digital form is transformed into respectively through A/D converter, acquisition bit sequence relends and helps digital signal processor, implement fast Fourier transform, namely the Fast Fourier Transform Inverse or the inverse discrete Fourier transform that counteract transmitting terminal change, complete the 4PSK demodulation of each carrier wave, again recover the differential coding plural number bit data flow be distributed on each carrier wave.
Because CDR signal transmits frame by frame, with the form of FFT to COFDM modulation demodulation before, CDR module by the nil symbol of transmission frame, should realize the thick time synchronized to each transmission frame start time.Turn off owing to being equivalent to transmitter during nil symbol, therefore, just can detect according to power and represent the nil symbol that each frame starts (separating each frame in other words).Have found nil symbol, also just achieve thick synchronous to CDR signal of CDR module time benchmark.
The bit stream of each transmission frame formed after Difference Solution, is subdivided into synchronizing channel, fast information channel in dab receiver and MSC data in solution recombiner.In solution recombiner, the data in MSC, according to the MCI transmitted in FIC, are divided into the logical frame of each sub-channels.Clock recovery is guaranteed by SC; Corresponding with originating terminal signal process, in CDR module, frequency deinterleaving is carried out after and then differential ference spiral; Then, in channel-decoding-Viterbi decoder, coding is knitted to the volume of transmitting terminal Signal coding application and decodes accordingly, regain the data flow of source code; Channel decoding bit stream, be transferred into a descrambler, make transmitting terminal implement energy dissipation or scrambling again recover.
For sound broadcasting programs, the source decoder in CDR module is that the signal of data compression is reverted to data transfer rate is again PCM signal, becomes the bit sequence being suitable for resetting and storing.After the decoding of source, then through D/A conversion, the voice signal sending simulation for.It should be noted that, at source decoder, except the data flow of voice signal, to also have the stream of the data service relevant with program.Therefore, should consider two outputs, as shown in Figure 8, be the circuit diagram of source decoder in CDR module of the present invention., also must decode to PAD data flow meanwhile, and depend on actual data service structure, the function of PAD decoder is controlled by fast information channel in dab receiver.
So far, the solution of the present invention is able to complete description, but according to the mobile terminal with Chinese Digital audio broadcasting (CDR) receiving function of the present invention, be not restricted to listed in specification and execution mode utilization, it can be applied to the field of various applicable the present invention completely, easily can realize additional advantage and modify for those skilled in the art, therefore when not deviating from the spirit and scope of the universal that claim and equivalency range limit, the present invention is not limited to specific details, representational equipment and illustrating here and the examples shown described.
Claims (10)
1. there is a mobile terminal for Chinese Digital audio broadcasting CDR receiving function, comprising:
Control the control module of described mobile terminal;
The memory module be connected with described control module, man-machine interface, audio processing modules and power module;
The radio frequency module be connected with described control module, and
The CDR module be connected with described RF module, it receives the digital audio broadcasting signal that described RF module sends over, and under the control of described control module, send to described audio processing modules to play at loud speaker the digital audio broadcasting signal after process.
2. mobile terminal according to claim 1, also comprises:
The LCD module of liquid crystal display be connected with described control module, for carrying out video display.
3. mobile terminal according to claim 1, wherein, described CDR module is connected with described LCD module, for sending vision signal to described LCD module.
4., according to the mobile terminal one of claim 1-3 Suo Shu, also comprise:
AM/FM tuner module, it is under the control of described control module, receives AM or the FM signal of RF module transmission and processes described signal.
5., according to the mobile terminal one of claim 1-3 Suo Shu, the signal that described CDR module receives is the signal of very high frequency(VHF) VHF wave band.
6., according to the mobile terminal one of claim 1-3 Suo Shu, the signal that described CDR module receives is the signal of L-band, and the signal of L-band is transformed to the signal of very high frequency(VHF) VHF wave band.
7. according to the mobile terminal one of claim 1-3 Suo Shu, described control module by uC interface to CDR module realize control command process, tuning control, zero-signal detection, Synchronization Control, audio frequency control, subchannel select in one or more.
8., according to the mobile terminal one of claim 1-3 Suo Shu, described CDR module also has CDR module data interface, realizes the exterior storage of the decoded data from CDR signal.
9., according to the portable terminal device one of claim 1-3 Suo Shu, described CDR module has needs optional two-way integrated circuit built-in audio bus I2C interface according to Systematical control.
10., according to the portable terminal device one of claim 1-3 Suo Shu, between described CDR module and described apparatus for processing audio, carry out transfer of data by the digital audio interface of integrated circuit built-in audio bus I2S form.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510456848.XA CN105072265A (en) | 2015-07-29 | 2015-07-29 | Mobile terminal with China digital radio broadcasting (CDR) receiving function |
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| CN201510456848.XA CN105072265A (en) | 2015-07-29 | 2015-07-29 | Mobile terminal with China digital radio broadcasting (CDR) receiving function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105515700A (en) * | 2015-12-14 | 2016-04-20 | 北京海尔集成电路设计有限公司 | Terminal with FM (frequency modulation) and CDR (China Digital Radio) receiving functions and implementing method thereof |
| CN107070470A (en) * | 2017-03-03 | 2017-08-18 | 北京海尔集成电路设计有限公司 | A kind of CDR data output circuits and data output method |
| CN107580189A (en) * | 2017-09-04 | 2018-01-12 | 成都德芯数字科技股份有限公司 | Information carrying means, system and information transferring method |
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| US20040105532A1 (en) * | 2002-11-29 | 2004-06-03 | Kabushiki Kaisha Toshiba | Broadcast receiving apparatus, control method thereof, portable information terminal, and control method thereof |
| CN1794592A (en) * | 2005-12-31 | 2006-06-28 | 北京中星微电子有限公司 | Portable terminal possessing digital audio broadcasting (DAB) receiving function |
| CN204967944U (en) * | 2015-07-29 | 2016-01-13 | 北京海尔集成电路设计有限公司 | Mobile terminal with china digital audio broadcasting (CDR) receives function |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040105532A1 (en) * | 2002-11-29 | 2004-06-03 | Kabushiki Kaisha Toshiba | Broadcast receiving apparatus, control method thereof, portable information terminal, and control method thereof |
| CN1794592A (en) * | 2005-12-31 | 2006-06-28 | 北京中星微电子有限公司 | Portable terminal possessing digital audio broadcasting (DAB) receiving function |
| CN204967944U (en) * | 2015-07-29 | 2016-01-13 | 北京海尔集成电路设计有限公司 | Mobile terminal with china digital audio broadcasting (CDR) receives function |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515700A (en) * | 2015-12-14 | 2016-04-20 | 北京海尔集成电路设计有限公司 | Terminal with FM (frequency modulation) and CDR (China Digital Radio) receiving functions and implementing method thereof |
| CN107070470A (en) * | 2017-03-03 | 2017-08-18 | 北京海尔集成电路设计有限公司 | A kind of CDR data output circuits and data output method |
| CN107580189A (en) * | 2017-09-04 | 2018-01-12 | 成都德芯数字科技股份有限公司 | Information carrying means, system and information transferring method |
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Application publication date: 20151118 |
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