CN102594477A - Method and device for receiving medium-frequency-wave emergency broadcasting information - Google Patents
Method and device for receiving medium-frequency-wave emergency broadcasting information Download PDFInfo
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- CN102594477A CN102594477A CN2011100033694A CN201110003369A CN102594477A CN 102594477 A CN102594477 A CN 102594477A CN 2011100033694 A CN2011100033694 A CN 2011100033694A CN 201110003369 A CN201110003369 A CN 201110003369A CN 102594477 A CN102594477 A CN 102594477A
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Abstract
The invention discloses a method and a device for receiving medium-frequency-wave emergency broadcasting information. Based on the technology that at present, DTMF (Dual Tone Multiple Frequency) signals are inserted in the medium-frequency-wave emergency broadcast to be used for transmitting emergency broadcasting information, emergency broadcasting control signals are extracted in medium-frequency-wave broadcasting control signals received by a terminal, and when the emergency broadcasting information contained in the medium-frequency broadcasting signals is judged according to the emergency broadcasting control signals, the emergency broadcasting information is received and broadcasted. A user terminal can receive the instant emergency broadcasting information and responds rapidly.
Description
Technical field
The present invention relates to AM (Amplitude Modulation, amplitude modulation) medium wave urgent broadcast communication technical field, relate in particular to a kind of method and apparatus that receives the medium wave emergent broadcasting information.
Background technology
The frequency of medium wave broadcast is generally 531kHz-1602KHz, and its wavelength is 575M-187M, and it has the advantages that propagation distance is far away, diffracting power is not influenced by sighting distance by force.Advantages such as medium wave broadcast is easy to receive, broad covered area become the important medium that masses obtain news and various information.
DTMF (Double Tone Multi Frequency; Dual-tone multifrequency) signal is made up of high frequency group and low frequency group; High and low frequency group respectively comprises 4 frequencies, and a composite signal is formed in a high-frequency signal and a low frequency signal stack, has very strong antijamming capability and higher transmission speed.At present, the dtmf signal overwhelming majority is the voice-frequency dialing as phone: the DTMF codec converts keystroke or digital information to two-tone signal and transmission when coding, in the dtmf signal of receiving, detects the existence of keystroke or digital information during decoding.In addition, dtmf signal also is used for
When listening to medium wave broadcast, need receiving terminal can receive the emergent broadcasting information that network sends immediately under some situation and present to the user, for example:
Warning information, for example: earthquake information, fire information, floods information, typhoon information etc.;
User related information, for example: arrearage information, dunning information, stored value card successful recharging information etc.;
System related information, for example: electronic business guide update information etc.
These emergent broadcasting informations and user's interests itself are closely related, and the user more early receives good more.Present user is receiving emergent broadcast information independently; Usually can not guarantee that the user can in time receive emergent broadcasting information; And when listening to other broadcast program, missed emergency broadcast message possibly, perhaps unwitting the time, in time do not open the broadcast receiver receiving emergency broadcast message.
Therefore; In order to make the user can receive instant emergent broadcasting information; Can adopt dtmf signal to transmit urgent broadcast phase related control information, be inserted in the medium wave broadcast signal, so how receiving emergent broadcast information just becomes those skilled in the art's problem demanding prompt solution.
Summary of the invention
The technical problem that the present invention will solve is, a kind of method and apparatus that receives the medium wave emergent broadcasting information is provided, and makes user terminal can receive instant emergent broadcasting information.
The technical scheme that the present invention adopts is that the method for said reception medium wave emergent broadcasting information comprises:
In the medium wave broadcast signal that receives, extract urgent broadcast control signaling;
When judging according to urgent broadcast control signaling when comprising emergent broadcasting information in the medium wave broadcast signal, then receive and play emergent broadcasting information.
Further, the said urgent broadcast control signaling of in the medium wave broadcast signal that receives, extracting specifically comprises:
With the medium wave broadcast conversion of signals that receives is that audio signal is play, and from the medium wave broadcast singal, demodulates dtmf signal simultaneously;
Dtmf signal decoded obtain urgent broadcast control signaling.
Further, the said urgent broadcast control signaling of in the medium wave broadcast signal that receives, extracting specifically comprises:
With the medium wave broadcast conversion of signals that receives is that audio signal is play, and from the medium wave broadcast singal, demodulates dtmf signal simultaneously;
Dtmf signal is carried out error-correcting decoding;
Obtain urgent broadcast control signaling to decoding through the dtmf signal behind the error-correcting decoding.
Further, said then reception and broadcast emergent broadcasting information specifically comprise:
According to the frequency jump information in the urgent broadcast control signaling, the frequency of receive frequency being adjusted to the emergent broadcasting information place receives the medium wave broadcast signal, plays emergent broadcasting information after converting audio signal into.
The present invention also provides a kind of device that receives the medium wave emergent broadcasting information, comprising:
The medium wave broadcast receiver module, being used for the medium wave broadcast conversion of signals that receives is that audio signal sends audio frequency power amplifier module to, demodulates dtmf signal from the medium wave broadcast singal simultaneously and sends the signaling extraction module to; Under the control of urgent broadcast control signaling, then the medium wave broadcast signal of receiving emergent broadcast information place frequency converts audio signal into and sends audio frequency power amplifier module to;
Audio frequency power amplifier module is used for playing audio signal;
The signaling extraction module, being used for dtmf signal decoded obtains urgent broadcast control signaling, sends power management module and medium wave broadcast receiver module to;
Power management module is used for when this device is opened, and gives medium wave broadcast receiver module, DTMF decoder module and audio frequency power amplifier module power supply.
Further, comprise frequency jump information and mains switch control information in the said urgent broadcast control signaling.
Further, said power management module is further used for when this device is not opened, and gives the power supply of medium wave broadcast receiver module and signaling extraction module, supplies power to audio frequency power amplifier module under the control of the mains switch information in urgent broadcast control signaling.
Further, said medium wave broadcast receiver module is further used for according to the frequency jump information in the urgent broadcast control signaling, and the frequency of receive frequency being adjusted to the emergent broadcasting information place receives.
Further, said signaling extraction module was further used for before dtmf signal is decoded, and earlier dtmf signal was carried out error-correcting decoding.
Adopt technique scheme, the present invention has advantage at least:
The method and apparatus of reception medium wave emergent broadcasting information according to the invention; Based at present dtmf signaling being inserted the technology that is used to transmit emergent broadcasting information in the medium wave urgent broadcast; In the medium wave broadcast signal that the terminal receives, extract urgent broadcast control signaling; When judging according to urgent broadcast control signaling when comprising emergent broadcasting information in the medium wave broadcast signal, then receive and play emergent broadcasting information.Make user terminal can receive instant emergent broadcasting information, make a response rapidly.
Description of drawings
Fig. 1 is the method flow diagram of the said reception medium wave of first embodiment of the invention emergent broadcasting information;
Fig. 2 is the method flow diagram of the said reception medium wave of second embodiment of the invention emergent broadcasting information;
Fig. 3 is that the device of the said reception medium wave of third embodiment of the invention emergent broadcasting information is formed sketch map;
Fig. 4 is that the device of the said reception medium wave of fourth embodiment of the invention emergent broadcasting information is formed sketch map.
Embodiment
Reach technological means and the effect that predetermined purpose is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to technical scheme of the present invention specify as after.
Dtmf signal is made up of the audio signal stack of high and low two frequencies.Each shows an information to such audio signal combination only table.According to the suggestion of CCITT, the multiple frequency that adopts in the world is 8 kinds of 697Hz, 770Hz, 852Hz, 941Hz, 1209Hz, 1336Hz, 1477Hz and 1633Hz etc.Can form 16 kinds of different combinations with these 8 kinds of frequencies, thereby represent 16 kinds of different information contents.
The first embodiment of the present invention, a kind of method that receives the medium wave emergent broadcasting information, as shown in Figure 1, comprise the steps:
Step S101 is that audio signal is play with the medium wave broadcast conversion of signals that receives, and from the medium wave broadcast singal, demodulates dtmf signal simultaneously.With the medium wave broadcast conversion of signals is that the process that audio signal is play is the known technology of this area, so locate not detail.
Step S102, dtmf signal decoded obtains urgent broadcast control signaling, the frequency jump information that comprises in the urgent broadcast control signaling.
Step S103 adjusts to the frequency that emergent broadcasting information belongs to according to the frequency jump information in the urgent broadcast control signaling with receive frequency, receives and also plays emergent broadcasting information.
The second embodiment of the present invention, a kind of method that receives the medium wave emergent broadcasting information, as shown in Figure 2, comprise the steps:
Step S201 is that audio signal is play with the medium wave broadcast conversion of signals that receives, and from the medium wave broadcast singal, demodulates dtmf signal simultaneously.
Step S202 carries out error-correcting decoding to dtmf signal.If transmitting terminal carried out error correction coding to dtmf signal, then this step be need increase, and when adopting digital AM signal, error correction coding and error-correcting decoding then needed as carrier wave, if when adopting simulation AM signal, then do not need error correction coding and error-correcting decoding as carrier wave.Error correction coding and error-correcting decoding to dtmf signal are existing chnnel coding processes, and coded system can independently be selected, and does not do particular requirement, can be parity check code, Hamming code, cyclic code etc.
Step S203 obtains urgent broadcast control signaling to decoding through dtmf signal behind the error-correcting decoding.The frequency jump information that comprises in the urgent broadcast control signaling.
Step S204 adjusts to the frequency that emergent broadcasting information belongs to according to the frequency jump information in the urgent broadcast control signaling with receive frequency, receives and also plays emergent broadcasting information.
The third embodiment of the present invention, a kind of device that receives the medium wave emergent broadcasting information, as shown in Figure 3, comprise following part: AM broadcast reception module, audio frequency power amplifier module, power management module and DTMF decoder module are formed.Wherein,
1) AM broadcast reception module is used to receive the AM broadcast singal, converts the AM broadcast singal that receives into audio signal and sends audio frequency power amplifier module to, from the medium wave broadcast singal, demodulates dtmf signal simultaneously and sends the DTMF decoder module to; According to the frequency jump information in the urgent broadcast control signaling, the frequency of receive frequency being adjusted to the emergent broadcasting information place receives, and converts the AM broadcast singal that receives into audio signal and sends audio frequency power amplifier module to.
Converting the AM broadcast singal into process that audio signal plays is the known technology of this area, so locate not detail.
2) audio frequency power amplifier module is used for playing audio signal;
3) DTMF decoder module is used for dtmf signal is decoded, and extracts urgent broadcast control signaling wherein, sends power management block and AM broadcast reception module to.Comprise frequency jump information and mains switch control information in the urgent broadcast control signaling.According to the process that the demodulation mode corresponding with modulation system carries out demodulation, is the known technology of this area to the AM broadcast singal, so locate not detail.
4) power management module is used for when this device is opened, and gives AM broadcast reception module, DTMF decoder module and audio frequency power amplifier module power supply; When this device is not opened, give the power supply of AM broadcast reception module and DTMF decoder module, supply power to audio frequency power amplifier module under the control of the mains switch information in urgent broadcast control signaling.
Adopt the AM broadcast receiver of the said device of present embodiment,, also can start audio frequency power amplifier module and play the urgent broadcast content through power management module even when the broadcast receiver power-off; If the AM broadcast receiver is being play other broadcast program, said device also can interrupt normal broadcast program and play under the control of urgent broadcast signaling, intercuts emergency broadcast message, guarantees that the user can receive instant emergency broadcast message.
The fourth embodiment of the present invention, a kind of device that receives the medium wave emergent broadcasting information, as shown in Figure 4, comprise following part: AM broadcast reception module, audio frequency power amplifier module, power management module, error correcting code decoding module and DTMF decoder module are formed.Wherein,
1) AM broadcast reception module is used to receive the AM broadcast singal, converts the AM broadcast singal that receives into audio signal and sends audio frequency power amplifier module to, from the medium wave broadcast singal, demodulates dtmf signal simultaneously and sends the error-correcting decoding module to; According to the frequency jump information in the urgent broadcast control signaling, the frequency of receive frequency being adjusted to the emergent broadcasting information place receives, and converts the AM broadcast singal that receives into audio signal and sends audio frequency power amplifier module to.
Convert the AM broadcast singal into audio signal and play, and the AM broadcast singal is carried out the known technology of equal this area of process of demodulation according to the demodulation mode corresponding with modulation system, so locate not detail.
2) audio frequency power amplifier module is used for playing audio signal;
3) error-correcting decoding module is used for dtmf signal is carried out error-correcting decoding.
4) DTMF decoder module is used for decoding through the error-correcting decoding dtmf signal, extracts urgent broadcast control signaling wherein, sends power management block and AM broadcast reception module to.Comprise frequency jump information and mains switch control information in the urgent broadcast control signaling.
5) power management module is used for when this device is opened, and gives AM broadcast reception module, error-correcting decoding module, DTMF decoder module and audio frequency power amplifier module power supply; When this device is not opened, give AM broadcast reception module, error-correcting decoding module and the power supply of DTMF decoder module, supply power to audio frequency power amplifier module under the control of the mains switch information in urgent broadcast control signaling.
Through the explanation of embodiment, should be to reach technological means and the effect that predetermined purpose takes to be able to more deeply and concrete understanding to the present invention, yet appended diagram only provide the usefulness of reference and explanation, is not to be used for the present invention is limited.
Claims (9)
1. a method that receives the medium wave emergent broadcasting information is characterized in that, comprising:
In the medium wave broadcast signal that receives, extract urgent broadcast control signaling;
When judging according to urgent broadcast control signaling when comprising emergent broadcasting information in the medium wave broadcast signal, then receive and play emergent broadcasting information.
2. according to the method for the said reception medium wave of claim 1 emergent broadcasting information, it is characterized in that the said urgent broadcast control signaling of in the medium wave broadcast signal that receives, extracting specifically comprises:
With the medium wave broadcast conversion of signals that receives is that audio signal is play, and from the medium wave broadcast singal, demodulates the dual tone multi-frequency dtmf signal simultaneously;
Dtmf signal decoded obtain urgent broadcast control signaling.
3. according to the method for the said reception medium wave of claim 1 emergent broadcasting information, it is characterized in that the said urgent broadcast control signaling of in the medium wave broadcast signal that receives, extracting specifically comprises:
With the medium wave broadcast conversion of signals that receives is that audio signal is play, and from the medium wave broadcast singal, demodulates dtmf signal simultaneously;
Dtmf signal is carried out error-correcting decoding;
Obtain urgent broadcast control signaling to decoding through the dtmf signal behind the error-correcting decoding.
4. according to the method for claim 1 or 2 or 3 said reception medium wave emergent broadcasting informations, it is characterized in that said then reception and broadcast emergent broadcasting information specifically comprise:
According to the frequency jump information in the urgent broadcast control signaling, the frequency of receive frequency being adjusted to the emergent broadcasting information place receives the medium wave broadcast signal, plays emergent broadcasting information after converting audio signal into.
5. a device that receives the medium wave emergent broadcasting information is characterized in that, comprising:
The medium wave broadcast receiver module, being used for the medium wave broadcast conversion of signals that receives is that audio signal sends audio frequency power amplifier module to, demodulates dtmf signal from the medium wave broadcast singal simultaneously and sends the signaling extraction module to; Under the control of urgent broadcast control signaling, then the medium wave broadcast signal of receiving emergent broadcast information place frequency converts audio signal into and sends audio frequency power amplifier module to;
Audio frequency power amplifier module is used for playing audio signal;
The signaling extraction module, being used for dtmf signal decoded obtains urgent broadcast control signaling, sends power management module and medium wave broadcast receiver module to;
Power management module is used for when this device is opened, and gives medium wave broadcast receiver module, DTMF decoder module and audio frequency power amplifier module power supply.
6. according to the device of the said reception medium wave of claim 5 emergent broadcasting information, it is characterized in that, comprise frequency jump information and mains switch control information in the said urgent broadcast control signaling.
7. according to the device of the said reception medium wave of claim 6 emergent broadcasting information; It is characterized in that; Said power management module; Be further used for when this device is not opened, give the power supply of medium wave broadcast receiver module and signaling extraction module, supply power to audio frequency power amplifier module under the control of the mains switch information in urgent broadcast control signaling.
8. according to the device of the said reception medium wave of claim 6 emergent broadcasting information; It is characterized in that; Said medium wave broadcast receiver module is further used for according to the frequency jump information in the urgent broadcast control signaling, and the frequency of receive frequency being adjusted to the emergent broadcasting information place receives.
9. according to the device of claim 5 or 6 or 7 or 8 said reception medium wave emergent broadcasting informations, it is characterized in that said signaling extraction module was further used for before dtmf signal is decoded, earlier dtmf signal is carried out error-correcting decoding.
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| CN2011100033694A CN102594477A (en) | 2011-01-10 | 2011-01-10 | Method and device for receiving medium-frequency-wave emergency broadcasting information |
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Cited By (1)
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| CN111541822A (en) * | 2020-04-30 | 2020-08-14 | 南通凡肯电子设备研发有限公司 | Control system and control method for broadcast communication |
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Application publication date: 20120718 |