CN102594475B - Amplitude modulation medium-wave emergency broadcasting message interpolation device and method - Google Patents
Amplitude modulation medium-wave emergency broadcasting message interpolation device and method Download PDFInfo
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- CN102594475B CN102594475B CN201110003368.XA CN201110003368A CN102594475B CN 102594475 B CN102594475 B CN 102594475B CN 201110003368 A CN201110003368 A CN 201110003368A CN 102594475 B CN102594475 B CN 102594475B
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Abstract
The invention discloses an amplitude modulation medium-wave emergency broadcasting message interpolation device and an amplitude modulation medium-wave emergency broadcasting message interpolation method. The method comprises the steps of: keeping time delay with third preset time length for an input broadcasting program audio signal; conducting gap detection to the input program audio signal, and when a program gap or a statement gap which is longer than first preset time length is detected in a broadcasting program, generating a dual-tone multiple-frequency emergency broadcasting signal which lasts for second preset time length and broadcasting the signal according to preset frequency; and interpolating the dual-tone multiple-frequency emergency broadcasting signal in the program gap or the statement gap which is longer than the first preset time length, mixing the dual-tone multiple-frequency emergency broadcasting signal with the program audio signal with the third preset time length and outputting the signals. By interpolating the dual-tone multiple-frequency encoded emergency broadcasting signal in the program gap or the statement gap of the broadcasting program audio signal, users can receive the emergency broadcasting message in time.
Description
Technical field
The present invention relates to broadcasting communication technology field, particularly relate to a kind of insertion apparatus and method of amplitude modulation medium-wave emergent broadcasting information.
Background technology
In some cases, need receiving terminal immediately to receive emergent broadcasting information that network sends also presents to user, such as:
Warning information, such as: earthquake information, fire information, flood information, Typhoon Information etc.
User related information: as arrearage information, dunning information, stored value card successful recharging information etc.
System related information: as electronic business guide update information etc.
The interests of these information and user itself are closely related, and user more early receives better.But under normal conditions, user can not always receiving emergent broadcast program.They may listen to other broadcast program or unwitting time not start shooting in time receiving emergency broadcast message.
Therefore, if the receiving terminal before using, under many circumstances, user cannot receiving emergent broadcast information in time, and this will cause user immediately cannot obtain information, cannot make a response rapidly.
Summary of the invention
In view of above-mentioned analysis, the present invention aims to provide a kind of insertion apparatus and method of amplitude modulation medium-wave emergent broadcasting information, cannot the problem of receiving emergent broadcast information in time in order to solve the user that exists in prior art.
Object of the present invention is mainly achieved through the following technical solutions:
The invention provides a kind of insertion apparatus of amplitude modulation medium-wave emergent broadcasting information, comprising: program gap detecting module, delay circuit module, double-tone multi-frequency coding module and signaling broadcast control module composition, wherein,
Described program gap detecting module, for carrying out gap detecting to the program audio signal of input, when detecting in broadcast program the gap of program gap phase or the statement being greater than the first scheduled time length, controlling described double-tone multi-frequency coding module and producing the dual-tone multifrequency emergency broadcast signal continuing the second scheduled time length;
Described delay circuit module, for keeping the time delay of the 3rd scheduled time length to the broadcast program audio signal of input;
Described signaling broadcasts control module, broadcasts dual-tone multifrequency emergency broadcast signal for controlling described double-tone multi-frequency coding module by predetermined frequency;
Described double-tone multi-frequency coding module, for producing the dual-tone multifrequency emergency broadcast signal of lasting second scheduled time length and broadcast by predetermined frequency broadcast the control of control module in described signaling under under the control of described program gap detecting module, insert described dual-tone multifrequency emergency broadcast signal in the gap of or statement interim in the program gap being greater than the first scheduled time length, carry out mixing rear output with the program audio signal of time delay the 3rd scheduled time length.
Further, described device also comprises:
Error correction code module, for carrying out error correction coding protection to the described dual-tone multifrequency emergency broadcast signal inserted.
Present invention also offers a kind of insertion method of amplitude modulation medium-wave emergent broadcasting information, comprising:
Steps A: the time delay broadcast program audio signal of input being kept to the 3rd scheduled time length;
Step B: gap detecting is carried out to the program audio signal of input, when detecting in broadcast program the gap of program gap phase or the statement being greater than the first scheduled time length, producing the dual-tone multifrequency emergency broadcast signal of lasting second scheduled time length and broadcasting by predetermined frequency;
Step C: insert described dual-tone multifrequency emergency broadcast signal in the gap of or statement interim in the program gap being greater than the first scheduled time length, carries out mixing rear output with the program audio signal of time delay the 3rd scheduled time length.
Further, also comprise before the described dual-tone multifrequency emergency broadcast signal of insertion:
Error correction coding protection is carried out to described dual-tone multifrequency emergency broadcast signal.
Wherein, described second scheduled time length is that the time span that the touch-tone signal specified according to CCITT continues is determined, span is 40 milliseconds ~ 50 milliseconds; Described first scheduled time length and the 3rd scheduled time length need to determine according to the second scheduled time length.
Beneficial effect of the present invention is as follows:
The present invention, by the emergency broadcast signal inserting double-tone multi-frequency coding in the program gap phase of broadcast program audio signal or the gap of statement, makes user can receive emergent broadcasting information timely; Meanwhile, optional error correcting code protection is carried out to DTMF emergency broadcast signal, can further improve the antijamming capability of signaling.
Other features and advantages of the present invention will be set forth in the following description, and, becoming apparent from specification of part, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Fig. 1 is the structural representation of device described in the embodiment of the present invention;
The schematic flow sheet of method described in Fig. 2 embodiment of the present invention.
Embodiment
Specifically describe the preferred embodiments of the present invention below in conjunction with accompanying drawing, wherein, accompanying drawing forms the application's part, and together with embodiments of the present invention for explaining principle of the present invention.For purpose of clarity and simplification, when it may make theme of the present invention smudgy, illustrating in detail of known function and structure in device described herein will be omitted.
First, described in 1 pair of embodiment of the present invention, device is described in detail by reference to the accompanying drawings.
As shown in Figure 1, Fig. 1 is the structural representation of device described in the embodiment of the present invention, specifically can comprise: delay circuit module, program gap detecting module, DTMF (Double Tone Multi Frequency, dual-tone multifrequency) coding module, error correction code module and signaling broadcast control module, wherein
Program gap detecting module, gap detecting is carried out to the program audio signal of input, the program gap phase of the first scheduled time length (being set as 50 milliseconds in the embodiment of the present invention) or the gap of statement is greater than when detecting in broadcast program, and reed time controll dtmf code module produces DTMF emergency broadcast signal, the duration is the second scheduled time length (being set as 40 milliseconds in the embodiment of the present invention);
Delay circuit module, keeps the time delay of the 3rd scheduled time length (being set as 45 milliseconds in the embodiment of the present invention) to the program audio signal of input;
Signaling broadcasts control module, controls dtmf code module broadcasts lasting 40 milliseconds in (average 5 second 1 time) emergency broadcast signal by predetermined frequency;
Dtmf code module, under the control of program gap detecting module, produce the DTMF emergency broadcast signal continuing 40 milliseconds and broadcast by predetermined frequency broadcast the control of control module in signaling under, insert described DTMF emergency broadcast signal in the gap of or statement interim in the program gap being greater than 50 milliseconds, carry out mixing and exporting with the program audio signal of time delay 45 milliseconds.
Error correction code module, as an optional functional module, can strengthen the transmission reliability of DTMF emergency broadcast signal further.
Next method described in 2 pairs of embodiment of the present invention is described in detail by reference to the accompanying drawings.
As shown in Figure 2, Fig. 2 is the schematic flow sheet of method described in the embodiment of the present invention, specifically can comprise the following steps:
Step 201: the program audio signal of delay circuit module to input keeps the time delay of 45 milliseconds;
Step 202: the while of with step 201, the program audio signal of program gap detecting module to input carries out gap detecting, when detecting in broadcast program the gap of gap phase and the statement being not less than 50 milliseconds, performs step 203;
Step 203: program gap detecting module controls dtmf code module and produces DTMF emergency broadcast signal, the signaling duration is 40 milliseconds, broadcasts frequency and broadcasts control module to control (the signaling frequency of broadcasting can be controlled in average 5 second 1 time) by signaling;
Step 204: insert DTMF emergency broadcast signal in the gap in the program gap or statement that are greater than 50 milliseconds, mix with the program audio signal of time delay 45 milliseconds;
Step 205: optional error correcting code coding protection is carried out to the DTMF emergency broadcast signal inserted;
Step 206: the audio signal being inserted with DTMF emergency broadcast signal is exported.
It should be noted that, 40 milliseconds that mention in the above technical scheme minimum time length being the dtmf signal specified according to CCITT (CCITT) and continuing, the embodiment of the present invention is not merely limited to 40 milliseconds, generally can select between 40 milliseconds ~ 50 milliseconds; The time delay of 45 milliseconds comes fixed, and 5 milliseconds of extending are to have a Time Guard Interval, being also not only confined to 5 milliseconds more; Being not less than the gap phase of 50 milliseconds and the gap of statement mainly also comes fixed according to dtmf signal time duration, concrete length can set according to actual needs.
In sum, embodiments provide a kind of insertion apparatus and method of amplitude modulation medium-wave emergent broadcasting information, by in the emergency broadcast signal inserting double-tone multi-frequency coding in the program gap phase of broadcast program audio signal or the gap of statement, make user can receive emergent broadcasting information timely; Meanwhile, optional error correcting code protection is carried out to DTMF emergency broadcast signal, can further improve the antijamming capability of signaling.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change 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 (4)
1. an insertion apparatus for amplitude modulation medium-wave emergent broadcasting information, is characterized in that, comprising: program gap detecting module, delay circuit module, double-tone multi-frequency coding module and signaling broadcast control module composition, wherein,
Described program gap detecting module, for carrying out gap detecting to the program audio signal of input, when detecting in broadcast program the gap of program gap phase or the statement being greater than the first scheduled time length, controlling described double-tone multi-frequency coding module and producing the dual-tone multifrequency emergency broadcast signal continuing the second scheduled time length;
Described delay circuit module, for keeping the time delay of the 3rd scheduled time length to the broadcast program audio signal of input;
Described signaling broadcasts control module, broadcasts dual-tone multifrequency emergency broadcast signal for controlling described double-tone multi-frequency coding module by predetermined frequency;
Described double-tone multi-frequency coding module, for producing the dual-tone multifrequency emergency broadcast signal of lasting second scheduled time length and broadcast by predetermined frequency broadcast the control of control module in described signaling under under the control of described program gap detecting module, insert described dual-tone multifrequency emergency broadcast signal in the gap of or statement interim in the program gap being greater than the first scheduled time length, carry out mixing rear output with the program audio signal of time delay the 3rd scheduled time length;
Wherein, described second scheduled time length is that the time span that touch-tone signal according to the rules continues is determined, span is 40 milliseconds ~ 50 milliseconds; Described first scheduled time length and the 3rd scheduled time length need to determine according to the second scheduled time length.
2. device according to claim 1, is characterized in that, described device also comprises:
Error correction code module, for carrying out error correction coding protection to the described dual-tone multifrequency emergency broadcast signal inserted.
3. an insertion method for amplitude modulation medium-wave emergent broadcasting information, is characterized in that, comprising:
Steps A: the time delay broadcast program audio signal of input being kept to the 3rd scheduled time length;
Step B: gap detecting is carried out to the program audio signal of input, when detecting in broadcast program the gap of program gap phase or the statement being greater than the first scheduled time length, producing the dual-tone multifrequency emergency broadcast signal of lasting second scheduled time length and broadcasting by predetermined frequency;
Step C: insert described dual-tone multifrequency emergency broadcast signal in the gap of or statement interim in the program gap being greater than the first scheduled time length, carries out mixing rear output with the program audio signal of time delay the 3rd scheduled time length;
Wherein, described second scheduled time length is that the time span that touch-tone signal according to the rules continues is determined, span is 40 milliseconds ~ 50 milliseconds; Described first scheduled time length and the 3rd scheduled time length need to determine according to the second scheduled time length.
4. method according to claim 3, is characterized in that, also comprises before the described dual-tone multifrequency emergency broadcast signal of insertion:
Error correction coding protection is carried out to described dual-tone multifrequency emergency broadcast signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110003368.XA CN102594475B (en) | 2011-01-10 | 2011-01-10 | Amplitude modulation medium-wave emergency broadcasting message interpolation device and method |
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| CN201110003368.XA CN102594475B (en) | 2011-01-10 | 2011-01-10 | Amplitude modulation medium-wave emergency broadcasting message interpolation device and method |
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| CN102594475A CN102594475A (en) | 2012-07-18 |
| CN102594475B true CN102594475B (en) | 2015-03-25 |
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| CN116155425B (en) * | 2023-04-23 | 2023-07-04 | 成都德芯数字科技股份有限公司 | Instruction sound eliminating method and system for medium wave emergency broadcast |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1192614A (en) * | 1997-03-03 | 1998-09-09 | 索尼公司 | Audio data transmission apparatus and method, audio data recording apparatus, and audio data recording medium |
| CN101651507A (en) * | 2008-08-15 | 2010-02-17 | 威盛电子(中国)有限公司 | Method and system for securely playing multimedia broadcast content and multimedia broadcast system |
| CN101702626A (en) * | 2009-11-06 | 2010-05-05 | 徐汉阳 | Cassette automatic recorder for listening behavior of frequency and amplitude modulating broadcast |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010268226A (en) * | 2009-05-14 | 2010-11-25 | Toshiba Corp | Broadcasting receiver |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1192614A (en) * | 1997-03-03 | 1998-09-09 | 索尼公司 | Audio data transmission apparatus and method, audio data recording apparatus, and audio data recording medium |
| CN101651507A (en) * | 2008-08-15 | 2010-02-17 | 威盛电子(中国)有限公司 | Method and system for securely playing multimedia broadcast content and multimedia broadcast system |
| CN101702626A (en) * | 2009-11-06 | 2010-05-05 | 徐汉阳 | Cassette automatic recorder for listening behavior of frequency and amplitude modulating broadcast |
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