CN102594474A - System for realizing amplitude modulation medium wave emergency broadcast and method thereof - Google Patents
System for realizing amplitude modulation medium wave emergency broadcast and method thereof Download PDFInfo
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Abstract
The invention discloses a system for realizing amplitude modulation medium wave emergency broadcast and a method thereof. The system comprises a sending device and a receiving device. The sending device is used for dynamically inserting a dual-tone multifrequency emergency broadcast signaling according to a demand in a clearance period of a broadcast program audio signal or clearance of a statement, and mixing the dual-tone multifrequency emergency broadcast signaling with the broadcast program audio signaling, followed by outputting. The receiving device is used for receiving the broadcast program audio signal containing the dual-tone multifrequency emergency broadcast signaling outputted by the sending device, carrying out power amplification on the broadcast program audio signal and outputting the signal, simultaneously decoding an emergent broadcast signal, and triggering a radio set to receive the emergent broadcast signal. According to the system and the method, by utilizing strong anti-interference capability and high transmission speed of a dual-tone multifrequency signal, the signaling is strictly inserted into broadcast program clearance, and a problem that a user can not receive emergent broadcast information timely in the prior art is overcome.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of system and method for realizing amplitude modulation medium wave urgent broadcast.
Background technology
Under some situation, need receiving terminal can receive the emergent broadcasting information that network sends immediately and present to the user, for example: warning information comprises earthquake information, fire information, floods information, typhoon information etc.
These information and user's interests itself are closely related, and the user more early receives good more.But user's receiving emergent broadcast information always not under normal conditions.They may listen to other broadcast program or unwitting the time, not timely start receiving emergency broadcast message.
Therefore, if the receiving terminal before using, under many circumstances, the user is receiving emergent broadcast information in time, and this will cause the user can't in time obtain emergence message, can't make a response rapidly.
Summary of the invention
In view of above-mentioned analysis, the present invention aims to provide a kind of system and method for realizing amplitude modulation medium wave urgent broadcast, in order to solve the user that exists in the prior art problem of receiving emergent broadcast information in time.
The object of the invention is mainly realized through following technical scheme:
The invention provides a kind of system that realizes amplitude modulation medium wave urgent broadcast, comprising: dispensing device and receiving system, wherein,
Said dispensing device is used for dynamically inserting dual-tone multifrequency urgent broadcast signaling in the gap phase of broadcast program audio signal or the gap of statement by demand, and mixes back output with said broadcast program audio signal;
Said receiving system; Be used to receive the broadcast program audio signal that includes dual-tone multifrequency urgent broadcast signaling of said dispensing device output; And the broadcast program audio signal of inciting somebody to action wherein carries out exporting after the power amplification; Simultaneously urgent broadcast signal is wherein decoded, trigger broadcast receiver and receive said urgent broadcast signal.
Further, said dispensing device comprises: program gap detecting module, delay circuit module, double-tone multi-frequency coding module and signaling are broadcast control module and are formed; Wherein,
Said program gap detecting module; Be used for the broadcast program audio signal of input is carried out the gap detecting; In detecting broadcast program, during greater than the gap of program gap phase of first scheduled time length or statement, control said double-tone multi-frequency coding module and produce the dual-tone multifrequency urgent broadcast signaling that continues second scheduled time length;
Said delay circuit module is used for the broadcast program audio signal of input is kept the time delay of the 3rd scheduled time length;
Said signaling is broadcast control module, is used to control said double-tone multi-frequency coding module and broadcasts dual-tone multifrequency urgent broadcast signaling by predetermined frequency;
Said double-tone multi-frequency coding module; Be used for broadcasting under the control of control module and broadcast by predetermined frequency in the dual-tone multifrequency urgent broadcast signaling that produce to continue second scheduled time length under the control of said program gap detecting module and in said signaling; In the gap of or statement interim, insert said dual-tone multifrequency urgent broadcast signaling, mix back output with the broadcast program audio signal of the 3rd scheduled time length of delaying time greater than the program gap of first scheduled time length;
Further, said dispensing device also comprises:
Error correction code module is used for the said dual-tone multifrequency urgent broadcast signaling of inserting is carried out the error correction coding protection.
Further, said receiving system specifically comprises:
Said broadcast reception module; Be used to receive the broadcast singal that is mixed with urgent broadcast signaling and broadcast program audio signal of said double-tone multi-frequency coding module output; Send broadcast program audio signal wherein to audio frequency power amplifier module, send the urgent broadcast signal that demodulates to the dual-tone multifrequency decoder module simultaneously;
Said audio frequency power amplifier module is used for the broadcast program audio signal that receives from said broadcast reception module is carried out exporting after the power amplification;
Said dual-tone multifrequency decoder module is used for the urgent broadcast signal that receives from said broadcast reception module is decoded, and the triggering power management module begins audio frequency power amplifier module is supplied power;
Said power management module is used for supplying power to said audio frequency power amplifier module.
The present invention also provides a kind of method that realizes amplitude modulation medium wave urgent broadcast, and said method is utilized a kind of system that realizes amplitude modulation medium wave urgent broadcast, and said method comprises:
Dispensing device dynamically inserts dual-tone multifrequency urgent broadcast signaling by demand in the gap of gap phase of broadcast program audio signal or statement, and mixes back output with said broadcast program audio signal;
Receiving system is after the broadcast program audio signal that includes dual-tone multifrequency urgent broadcast signaling that receives said dispensing device output; Broadcast program audio signal is wherein carried out exporting after the power amplification; Simultaneously urgent broadcast signal is wherein decoded, trigger broadcast receiver and receive said urgent broadcast signal.
Further, said steps A specifically comprises:
The delay circuit module keeps the time delay of the 3rd scheduled time length to the broadcast program audio signal of input;
Program gap detecting module carries out the gap detecting to the broadcast program audio signal of input; During greater than the gap of program gap phase of first scheduled time length or statement, control double-tone multi-frequency coding module produces the dual-tone multifrequency urgent broadcast signaling that continues second scheduled time length in detecting broadcast program;
The double-tone multi-frequency coding module is broadcast in the dual-tone multifrequency urgent broadcast signaling that produce to continue second scheduled time length under the control of said program gap detecting module and in said signaling under the control of control module and is broadcast by predetermined frequency; In the gap of or statement interim, insert dual-tone multifrequency urgent broadcast signaling, mix back output with the broadcast program audio signal of the 3rd scheduled time length of delaying time greater than the program gap of first scheduled time length.
Further, before inserting said dual-tone multifrequency urgent broadcast signaling, said steps A also comprises:
Error correction code module is carried out the error correction coding protection to said dual-tone multifrequency urgent broadcast signaling.
Further, said step B specifically comprises:
The broadcast reception module is behind the broadcast singal that is mixed with urgent broadcast signaling and broadcast program audio signal that receives said double-tone multi-frequency coding module output; Send broadcast program audio signal wherein to audio frequency power amplifier module, send the urgent broadcast signal that demodulates to the dual-tone multifrequency decoder module simultaneously;
Said audio frequency power amplifier module carries out exporting after the power amplification to the broadcast program audio signal that receives from said broadcast reception module; Said dual-tone multifrequency decoder module is decoded to the urgent broadcast signal that receives from said broadcast reception module, and the triggering power management module begins audio frequency power amplifier module is supplied power.
Wherein, said second scheduled time length is that the time span that touch-tone signal according to the rules continues confirms that span is 40 milliseconds～50 milliseconds; Said first scheduled time length and the 3rd scheduled time length need be confirmed according to second scheduled time length.
Beneficial effect of the present invention is following:
The present invention utilizes very strong antijamming capability of touch-tone signal and higher transmission speed, and strict the insertion in the middle of the broadcast program gap overcome the user that exists in the prior art problem of receiving emergent broadcast information in time.
Other features and advantages of the present invention will be set forth in specification subsequently, and from specification, becoming of part is obvious, perhaps understands through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Fig. 1 is the structural representation of the said system of the embodiment of the invention;
Fig. 2 is the schematic flow sheet of the said method of the embodiment of the invention;
Fig. 3 is in the said method of the embodiment of the invention, the schematic flow sheet of process of transmitting;
Fig. 4 is in the said method of the embodiment of the invention, the schematic flow sheet of receiving course.
Embodiment
Specifically describe the preferred embodiments of the present invention below in conjunction with accompanying drawing, wherein, accompanying drawing constitutes the application's part, and is used to explain principle of the present invention with embodiments of the invention.For clear and simplification purpose, when it possibly make theme of the present invention smudgy, with specifying in detail of known function and structure in the omission device described herein.
At first, be elaborated in conjunction with 1 pair of said system of the embodiment of the invention of accompanying drawing.
As shown in Figure 1; Fig. 1 is the structural representation of the said system of the embodiment of the invention; Specifically comprise: dispensing device and receiving system, wherein, dispensing device specifically comprises: delay circuit module, program gap detecting module, DTMF (Double Tone Multi Frequency; Dual-tone multifrequency) coding module, error correction code module and signaling are broadcast control module, and receiving system comprises: broadcast reception module, audio frequency power amplifier module, voltage management module and DTMF decoder module; Receiving system specifically comprises: broadcast reception module, audio frequency power amplifier module and DTMF decoder module.
(1) dispensing device mainly is responsible in the gap of gap phase of broadcast program audio signal or statement, dynamically inserting dual-tone multifrequency urgent broadcast signaling by demand, and is mixed back output with said broadcast program audio signal;
Dispensing device specifically comprises: delay circuit module, program gap detecting module, dtmf code module, error correction code module and signaling are broadcast control module; Receiving system comprises: broadcast reception module, audio frequency power amplifier module, voltage management module and DTMF decoder module; Wherein
Program gap detecting module; The broadcast program audio signal of input is carried out the gap detecting; In detecting broadcast program greater than the program gap phase of first scheduled time length (being set at 50 milliseconds in the embodiment of the invention) or the gap of statement; And control dtmf code module generation DTMF urgent broadcast signaling in good time, the duration is second scheduled time length (being set at 40 milliseconds in the embodiment of the invention);
The delay circuit module keeps the time delay of the 3rd scheduled time length (being set at 45 milliseconds in the embodiment of the invention) to the broadcast program audio signal of importing;
Signaling is broadcast control module, and control dtmf code module is broadcast by predetermined frequency (for example average 5 seconds 1 time) and continued 40 milliseconds urgent broadcast signaling;
The dtmf code module; Produce to continue 40 milliseconds DTMF urgent broadcast signaling under the control of program gap detecting module and broadcasting in signaling under the control of control module and broadcast by predetermined frequency; In the gap of or statement interim, insert said DTMF urgent broadcast signaling, mix with 45 milliseconds the broadcast program audio signal of delaying time and export greater than 50 milliseconds program gap;
Error correction code module as an optional functional module, is used for the said dual-tone multifrequency urgent broadcast signaling of inserting is carried out the error correction coding protection, can further strengthen the transmission reliability of DTMF urgent broadcast signaling;
(2) receiving system; The main broadcast program audio signal that includes dual-tone multifrequency urgent broadcast signaling of being responsible for receiving said dispensing device output; And the broadcast program audio signal of inciting somebody to action wherein carries out exporting after the power amplification; Simultaneously urgent broadcast signal is wherein decoded, trigger broadcast receiver and receive said urgent broadcast signal;
Receiving system specifically comprises: broadcast reception module, audio frequency power amplifier module and DTMF decoder module, wherein,
The broadcast reception module; The broadcast singal that is mixed with urgent broadcast signaling and broadcast program audio signal of transmission and reception apparatus output; Send broadcast program audio signal wherein to audio frequency power amplifier module, send the urgent broadcast signal that demodulates to the DTMF decoder module simultaneously;
Audio frequency power amplifier module is used for the broadcast program audio signal that receives is carried out exporting after the power amplification;
The DTMF decoder module is decoded to the urgent broadcast signal, and the triggering power management module begins audio frequency power amplifier module is supplied power;
Power management module is used for supplying power to audio frequency power amplifier module.
Be elaborated to 4 pairs of said methods of the embodiment of the invention of accompanying drawing below in conjunction with accompanying drawing 2.
As shown in Figure 2, Fig. 2 is the schematic flow sheet of the said method of the embodiment of the invention, and the said method of the embodiment of the invention is utilized the described system of Fig. 1, specifically can may further comprise the steps:
Step 201: dispensing device dynamically inserts dual-tone multifrequency urgent broadcast signaling by demand in the gap of gap phase of broadcast program audio signal or statement, and mixes back output with said broadcast program audio signal;
Step 202: receiving system is after the broadcast program audio signal that includes dual-tone multifrequency urgent broadcast signaling that receives said dispensing device output; Broadcast program audio signal is wherein carried out exporting after the power amplification; Simultaneously urgent broadcast signal is wherein decoded, trigger broadcast receiver and receive said urgent broadcast signal.
As shown in Figure 3, Fig. 3 is a step 201, and promptly the schematic flow sheet of process of transmitting specifically can comprise the steps:
Step 301: the delay circuit module keeps 45 milliseconds time delay to the broadcast program audio signal of input;
Step 302: with step 301 simultaneously, program gap detecting module carries out the gap detecting to the broadcast program audio signal of input, when in detecting broadcast program, being not less than 50 milliseconds the gap of gap phase and statement, execution in step 303;
Step 303: program gap detecting module control dtmf code module produces DTMF urgent broadcast signaling, and the signaling duration is 40 milliseconds, broadcasts frequency and broadcasts control module by signaling and control (the signaling frequency of broadcasting can be controlled in average 5 seconds 1 time);
Step 304: in greater than the gap of 50 milliseconds program gap or statement, insert DTMF urgent broadcast signaling, 45 milliseconds broadcast program audio signal is mixed with delaying time;
Step 305: the DTMF urgent broadcast signaling to inserting is carried out optional error correcting code coding protection;
Step 306: the audio signal to being inserted with DTMF urgent broadcast signaling is exported;
Step 307: the broadcast reception module is after receiving the broadcast singal that is mixed with urgent broadcast signaling and broadcast program audio signal of output; Send broadcast program audio signal wherein to audio frequency power amplifier module, send the urgent broadcast signal that demodulates to the DTMF decoder module simultaneously;
Step 308: audio frequency power amplifier module carries out exporting after the power amplification to the broadcast program audio signal that receives;
Step 309:DTMF decoder module is decoded to the urgent broadcast signal, and the triggering power management module begins audio frequency power amplifier module is supplied power.
As shown in Figure 4, Fig. 4 is a step 202, and promptly the schematic flow sheet of receiving course specifically can comprise the steps:
Step 401: the broadcast reception module is behind the broadcast singal that is mixed with urgent broadcast signaling and broadcast program audio signal that receives said double-tone multi-frequency coding module output; Send broadcast program audio signal wherein to audio frequency power amplifier module, send the urgent broadcast signal that demodulates to the dual-tone multifrequency decoder module simultaneously;
Step 402: said audio frequency power amplifier module carries out exporting after the power amplification to the broadcast program audio signal that receives from said broadcast reception module;
Step 403: said dual-tone multifrequency decoder module is decoded to the urgent broadcast signal that receives from said broadcast reception module, and the triggering power management module begins audio frequency power amplifier module is supplied power.
Need to prove; 40 milliseconds that mention in the above technical scheme is the minimum time length that continues according to the dtmf signal that CCITT (CCITT) stipulates; The embodiment of the invention not merely is limited to 40 milliseconds, generally can between 40 milliseconds～50 milliseconds, select; 45 milliseconds time delay is to come surely according to 40 milliseconds dtmf signal duration length, and 5 milliseconds of prolonging are in order to have a guardtime at interval, also not only to be confined to 5 milliseconds more; It is fixed that the gap that is not less than 50 milliseconds gap phase and statement is mainly also come according to dtmf signal duration length, and concrete length can be set according to actual needs.
In sum; The embodiment of the invention provides a kind of system and method for realizing amplitude modulation medium wave urgent broadcast, utilizes very strong antijamming capability of dtmf signal and higher transmission speed, the strict insertion in the middle of the broadcast program gap (time span can not be less than 50 milliseconds); Though can hear; But because the duration is extremely lacked (40 milliseconds), repeat frequency extremely low (5 seconds 1 time), can ignore to the influence of program quality during actual the use.And consider present DTMF decoding chip large-scale production, cost is extremely low, can be extended to the urgent broadcast commercial application.And in the embodiment of the invention,, 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 above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (10)
1. a system that realizes amplitude modulation medium wave urgent broadcast is characterized in that, comprising: dispensing device and receiving system, wherein,
Said dispensing device is used for dynamically inserting dual-tone multifrequency urgent broadcast signaling in the gap phase of broadcast program audio signal or the gap of statement by demand, and mixes back output with said broadcast program audio signal;
Said receiving system; Be used to receive the broadcast program audio signal that includes dual-tone multifrequency urgent broadcast signaling of said dispensing device output; And the broadcast program audio signal of inciting somebody to action wherein carries out exporting after the power amplification; Simultaneously urgent broadcast signal is wherein decoded, trigger broadcast receiver and receive said urgent broadcast signal.
2. system according to claim 1 is characterized in that, said dispensing device comprises: program gap detecting module, delay circuit module, double-tone multi-frequency coding module and signaling are broadcast control module and are formed; Wherein,
Said program gap detecting module; Be used for the broadcast program audio signal of input is carried out the gap detecting; In detecting broadcast program, during greater than the gap of program gap phase of first scheduled time length or statement, control said double-tone multi-frequency coding module and produce the dual-tone multifrequency urgent broadcast signaling that continues second scheduled time length;
Said delay circuit module is used for the broadcast program audio signal of input is kept the time delay of the 3rd scheduled time length;
Said signaling is broadcast control module, is used to control said double-tone multi-frequency coding module and broadcasts dual-tone multifrequency urgent broadcast signaling by predetermined frequency;
Said double-tone multi-frequency coding module; Be used for broadcasting under the control of control module and broadcast by predetermined frequency in the dual-tone multifrequency urgent broadcast signaling that produce to continue second scheduled time length under the control of said program gap detecting module and in said signaling; In the gap of or statement interim, insert said dual-tone multifrequency urgent broadcast signaling, mix back output with the broadcast program audio signal of the 3rd scheduled time length of delaying time greater than the program gap of first scheduled time length.
3. system according to claim 2 is characterized in that, said dispensing device also comprises:
Error correction code module is used for the said dual-tone multifrequency urgent broadcast signaling of inserting is carried out the error correction coding protection.
4. system according to claim 1 is characterized in that, said receiving system specifically comprises:
Said broadcast reception module; Be used to receive the broadcast singal that is mixed with urgent broadcast signaling and broadcast program audio signal of said double-tone multi-frequency coding module output; Send broadcast program audio signal wherein to audio frequency power amplifier module, send the urgent broadcast signal that demodulates to the dual-tone multifrequency decoder module simultaneously;
Said audio frequency power amplifier module is used for the broadcast program audio signal that receives from said broadcast reception module is carried out exporting after the power amplification;
Said dual-tone multifrequency decoder module is used for the urgent broadcast signal that receives from said broadcast reception module is decoded, and the triggering power management module begins audio frequency power amplifier module is supplied power;
Said power management module is used for supplying power to said audio frequency power amplifier module.
5. system according to claim 2 is characterized in that, said second scheduled time length is that the time span that touch-tone signal according to the rules continues confirms that span is 40 milliseconds～50 milliseconds; Said first scheduled time length and the 3rd scheduled time length need be confirmed according to second scheduled time length.
6. a method that realizes amplitude modulation medium wave urgent broadcast is characterized in that, utilizes a kind of system that realizes amplitude modulation medium wave urgent broadcast, and said method comprises:
Dispensing device dynamically inserts dual-tone multifrequency urgent broadcast signaling by demand in the gap of gap phase of broadcast program audio signal or statement, and mixes back output with said broadcast program audio signal;
Receiving system is after the broadcast program audio signal that includes dual-tone multifrequency urgent broadcast signaling that receives said dispensing device output; Broadcast program audio signal is wherein carried out exporting after the power amplification; Simultaneously urgent broadcast signal is wherein decoded, trigger broadcast receiver and receive said urgent broadcast signal.
7. method according to claim 6 is characterized in that, said steps A specifically comprises:
The delay circuit module keeps the time delay of the 3rd scheduled time length to the broadcast program audio signal of input;
Program gap detecting module carries out the gap detecting to the broadcast program audio signal of input; During greater than the gap of program gap phase of first scheduled time length or statement, control double-tone multi-frequency coding module produces the dual-tone multifrequency urgent broadcast signaling that continues second scheduled time length in detecting broadcast program;
The double-tone multi-frequency coding module is broadcast in the dual-tone multifrequency urgent broadcast signaling that produce to continue second scheduled time length under the control of said program gap detecting module and in said signaling under the control of control module and is broadcast by predetermined frequency; In the gap of or statement interim, insert dual-tone multifrequency urgent broadcast signaling, mix back output with the broadcast program audio signal of the 3rd scheduled time length of delaying time greater than the program gap of first scheduled time length.
8. method according to claim 7 is characterised in that, before inserting said dual-tone multifrequency urgent broadcast signaling, said steps A also comprises:
Error correction code module is carried out the error correction coding protection to said dual-tone multifrequency urgent broadcast signaling.
9. method according to claim 6 is characterized in that, said step B specifically comprises:
The broadcast reception module is behind the broadcast singal that is mixed with urgent broadcast signaling and broadcast program audio signal that receives said double-tone multi-frequency coding module output; Send broadcast program audio signal wherein to audio frequency power amplifier module, send the urgent broadcast signal that demodulates to the dual-tone multifrequency decoder module simultaneously;
Said audio frequency power amplifier module carries out exporting after the power amplification to the broadcast program audio signal that receives from said broadcast reception module; Said dual-tone multifrequency decoder module is decoded to the urgent broadcast signal that receives from said broadcast reception module, and the triggering power management module begins audio frequency power amplifier module is supplied power.
10. method according to claim 7 is characterized in that, said second scheduled time length is that the time span that touch-tone signal according to the rules continues confirms that span is 40 milliseconds～50 milliseconds; Said first scheduled time length and the 3rd scheduled time length need be confirmed according to second scheduled time length.
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| CN105656583A (en) * | 2016-04-08 | 2016-06-08 | 苏州东奇信息科技股份有限公司 | Medium-wave emergency broadcasting system |
| CN106471814A (en) * | 2014-07-08 | 2017-03-01 | 索尼公司 | Dispensing device, sending method, reception device and method of reseptance |
| CN108810185A (en) * | 2018-06-01 | 2018-11-13 | 镇江乾坤传媒科技有限公司 | Distribution, the addressing coding method of data transmission under a kind of number medium wave channel |
| CN109792395A (en) * | 2016-09-30 | 2019-05-21 | 瑞典爱立信有限公司 | Method and apparatus for broadcast signaling transmission |
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| CN102594474B (en) | 2016-05-11 |
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