JPH0748832B2 - Television special signal detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention broadcasts a so-called notice chime sound that is continuously hit during a television broadcast by superimposing information to be broadcast by a subtitle super on a general broadcast program. The present invention relates to a device that detects breaking news, issues an alarm, and activates a recording device.

[Conventional technology]

In a telecommunications network, when a large-scale disaster, an accident, a serious social event, or the like occurs, emergency contact calls, sham calls, etc. may be inundated, resulting in congestion. Therefore, in the event of a large-scale disaster or accident, the parties who manage the network should collect the information as soon as possible, consider the impact on the network, and establish a system for maximizing the communication of emergency contact calls. I need to hurry.

Conventionally, when there is no breakdown of network equipment due to a disaster, accident, etc., the trigger for discovering such cases is TV,
In many cases, the "news bulletin" such as radio is the first report.

However, televisions are not always in the receiving state, and even if they are always in the receiving state, if there is no person near the receiver, it is not possible to discover it even if there is breaking news. It is impossible. Further, in order to discover the breaking news that is unknown when it will be broadcast, it is a task that human beings constantly monitor the receiver, which is a work that ignores human nature, and is not realistic.

Furthermore, even if a person accidentally discovers breaking news, the broadcast is transient and it is difficult to reconfirm the contents.
There was also a drawback to say.

By the way, the "Emergency Alert Broadcast System" is known as a broadcast similar to the so-called "News Bulletin"("Ministerial Ordinance to revise a part of the Radio Law Enforcement Regulations", June 1, 1985) No. 64), as will be described in detail below, it is significantly different from the breaking news targeted by the present invention in object (effect) and system configuration.

(I) Purpose (effect) "Emergency alert broadcasting" is (a) When a warning declaration is issued by the provisions of the Large-scale Earthquake Countermeasures Act, and (b) When a tsunami alert is issued by the provisions of the Meteorological Service Act. (C) A system used to promptly disseminate information to special receiving terminals only when broadcasting is required by the provisions of the Basic Law for Disaster Countermeasures, accidents, and other general societies. Critically important news is not covered. Therefore, the range of information that can be collected by the "news bulletin" is significantly wider.

(Ii) System Configuration When performing the emergency alert broadcast, the television broadcast station first issues an emergency alert signal by placing it on a general broadcast wave. The emergency warning signal is modulated by a frequency shift method, and a mark (indicating 1) frequency and a space (indicating 0) frequency are defined respectively. A digital code obtained by combining these 1 and 0 codes. It is composed by.

There are types of start signals and end signals in the emergency alert signal, but both signals include identification codes such as area classification code and month / day classification code in the signal and are equipped with the emergency broadcast receiving equipment. The receiving terminal receives the start signal, and when the various codes match the codes set in the terminal in advance, the power switch is automatically turned on to receive the broadcast contents and receive the end signal sent after the broadcast. At the same time, the power switch is automatically turned off. In other words, the emergency alert broadcast is a system designed to be automatically received by the receiver, and in particular, it sends an alert signal by a special digital code before and after the fact. An analog waveform superimposed on the sound during general broadcasting (sounds four times at intervals of about 1 second, then pauses for about 2 seconds, and then again at intervals of about 1 second.
It is a ringing signal, and for breaking news, a specific frequency of 1075Hz is used. Also, one analog waveform is a sine wave that has the largest amplitude at the start and then decays rapidly). to differ greatly. In other words, "news bulletin" is not considered in advance so that it will be automatically detected by the machine, and attempting to automatically detect this involves technically great difficulty. It was not realized.

[Problems to be solved by the invention]

As described above, conventionally, it has been difficult to automatically detect breaking news during television broadcasting.

The present invention was devised in view of such a point, and provides an apparatus for automatically detecting the start of breaking news flash from a television being broadcast, issuing an alarm, and automatically starting a recording apparatus. It is intended to be provided.

[Means and Actions for Solving Problems]

The present invention provides breaking news information during television broadcasting,
It detects by extracting the notice chime sound that is repeatedly hit, and raises the alarm message by the voice synthesizer and also alerts the operator by blinking the alarm lamp, and at the same time automatically activates the external recording device. To record the contents of breaking news.

In particular, when extracting the advance notice chime sound, the specific frequency extraction unit extracts only the voice band signal of the specific frequency forming the advance notice chime sound used in the breaking news, and the waveform shaping unit includes the voice band signal of the specific frequency. Whether or not one notice chime sound is converted into one pulse, and the pulse generation interval verification section satisfies the standard value of the notice chime sound generation interval for repeated hits. The pulse value is output to the counter section only when the standard value is satisfied, the counter section counts, and the count value of the counter section is the actual value during the counting period designated in advance by the timer section. When the number of notice chime sounds included in the breaking news is equal, the detection accuracy is improved by determining that the breaking news starts.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention.

The apparatus according to the present embodiment is roughly composed of a telephony unit 100, a detection unit 200, an alarm unit 300, an external recording device activation unit 400, an external TV activation control unit 500, and a test unit 600.

The television broadcast signal from the external antenna is guided from the antenna input terminal 101 to the tuner 102 in the television section 100. Channel selection in the tuner 102 is set by the channel selection switch 103. The signal output after passing through the tuner is passed through a video intermediate frequency amplifier 104, a video detector 105 and a video amplifier.
A part of the signal output from the video amplifier reaches the internal video monitor via the video output circuit 107 and the monitor control unit 108.
Drive 109.

A part of the signal output of the video amplifier 106 is input to the audio detector 110, the audio signal is extracted from the video signal, and the detector 200
Is output to. A part of the output from the voice detector 110 drives the internal monitor speaker 112 via the voice amplifier 111 and the monitor control unit 108.

When the audio signal output from the audio detector 110 is input to the detection unit 200, as will be described later, a specific frequency is detected from the audio signal, the waveform is shaped into a pulse, and the pulse is preset. Within a predetermined time, at a preset permissible time interval and when a preset number is counted, it is determined that the news flash has started and a start signal is issued to the alarm unit 300, the external recording device start unit 400, and the external TV start control unit. Output for 500.

Upon receiving the activation signal, the alarm announcement control unit 301 activates and controls the speech synthesizer 302, and a ROM is stored in the speech synthesizer.
The message (for example, "news bulletin") stored by is synthesized and output as an audio signal. The number of times the message is repeated and the interruption time between messages are controlled by the alarm announcement controller. Further, the transmission of the message is stopped when the system reset button 303 is pressed. Some of the audio signals output from the speech synthesizer 302 directly drive the internal speaker 304, and some of the audio signals drive the external speaker 306 via the audio amplifier 305.

Upon receiving the activation signal, the alarm lamp control unit 307 blinks the internal alarm lamp 308 and the external alarm lamp 309 until the system reset button 303 is pressed.

The external recording device activation unit 400 is a signal line 402 between the external recording device 401 and the power-on control unit, and a signal line 403 between the external recording device 401 and the recording activation control unit.
Each is pre-wired. Upon receiving the activation signal, the external recording device activation unit 400 first outputs a power-on command to the external recording device 401 through the signal line 402,
A recording start command is output to the external recording device 401 through the signal line 403 after a preset time has elapsed from the output of the power-on command. The time difference is provided in advance between the two commands in order to secure a warming-up time between the external recording devices, and this time is usually several hundred milliseconds.

Upon receiving the activation signal, the external television activation control unit 500 connects a commercial power source to the external television 502 through the power line 501.

When the system reset button 303 is pressed, the commercial power supply is cut off.

The test section 600 will be described in detail later.

FIG. 2 is a diagram illustrating the detection unit 200 and the test unit 600 in detail. The audio output output from the audio detector 110 in the television section is first input to the audio amplifier 201 of the detection section.
This is because the warning chime sound associated with breaking news is generally low in level and difficult to detect, so it is necessary to raise the level. The audio signal amplified by the amplifier 201 is input to the specific frequency extraction unit 202. The extraction unit is configured to extract only the signal (analog waveform) of the specific frequency from the superposed signal of the specific frequency that constitutes the general voice signal and the notice chime sound, and the analog signal output by the extraction unit is waveform-shaped. It is input to the unit 203. The waveform shaping unit 203 rectifies and smoothes the signal of the specific frequency, and then, by a so-called Schmitt circuit, shapes the analog waveform signal into a digital waveform (rectangular wave) signal and outputs it. FIG. 5 shows the operation of the waveform shaping section. (A) is an analog waveform after extracting a specific frequency. (B) is a waveform obtained by full-wave rectifying the signal of (a). (C) is a waveform obtained by smoothing the waveform of (b). (D)
Is a pulse waveform obtained by inputting the waveform of (c) to the Schmitt circuit. Here, the reference voltage V _R when the output becomes L level is smaller than the reference voltage V _R ′ when the output becomes H level. is doing. Although FIG. 5 shows the case where the analog waveform is input twice, the analog waveform is input eight times in the actual news bulletin. Although the notice chime sound is drawn as a damped sine wave, the waveform shaping circuit 203 performs the same operation even if a non-damped sine wave is input.
It is obvious that one pulse is output for each notice chime sound.

When the signal pulse after the shaping is the first signal after the system is reset, the rising edge of the signal pulse is used as a trigger to activate the reference pulse generator 204 and the counter reset timer 205.

The reference pulse generation unit 204 first catches the rising edge of the pulse output from the waveform shaping section after the system reset, and from the time of the rising edge, the counter reset timer 20
Until the reset signal from 5 is input, pulses are continuously output to the comparison unit 206 at preset time intervals Ti. In this case, the width of one pulse is about the same as the width of the pulse output from the waveform shaping unit 203, and the interval Ti between the pulses is about the same as the pulse interval output from the waveform shaping unit 203. Set in advance.

After the system reset, the timer 205 for counter reset starts time measurement from the rising time of the pulse output from the waveform shaping section first, and the time when the allowable time corresponding to the pulse number set by the pulse number setting switch 207 elapses. Then, the reset signal is output to the reference pulse generation unit 204 and the activation signal output unit 208. The counter reset timer 205 is also reset by the reset signal output from itself. By the way, in the actual repeated hitting condition of the advance notice chime sound, it sounds 4 times at intervals of about 1 second, then pauses for about 2 seconds, and then sounds again 4 times at intervals of about 1 second. Therefore, in case of urgent detection, it is necessary to judge whether it is the breaking news by only four consecutive hits in the first half, and in case of requiring certainty in the detection, by consecutive eight hits in the first half and the latter half including the pause. Good. Therefore, when (i) 4 pulses are set as the permissible time corresponding to the above-mentioned set number of pulses,
The time obtained by adding the time required for the output of a start signal, which will be described later, to the actual measurement time from the rise time of the pulse signal corresponding to the chime sound of the first shot to the rise time of the pulse signal of the fourth shot is set, (ii ) When set to 8 pulses,
The time required to output the start signal described later was added to the actual measurement time from the rise of the pulse signal corresponding to the first hitting chime sound to the rise of the pulse signal of the eighth hit including the pause time in the middle. Just set the time.

Now, the pulse signal output from the waveform shaping unit 203 reaches the comparison unit 206 via the compensation time giving unit 210, but here, for convenience of description, first, assuming that the compensation time giving unit 210 is not provided, The processing of signals after the comparison unit 206 in the present invention will be described.

In the comparison unit 206, in order to prevent malfunction due to noise having no regularity in the appearance interval, the output pulse train from the waveform shaping unit 203 and the reference pulse generation unit 204 having a pulse interval Ti approximately equal to the continuous hitting interval of the chime ANDed with the pulse train output from.

The pulse train output after the logical product is calculated in the comparison unit 206 is input to the pulse number counter 209. In the pulse number counter 209, when the number of input pulses reaches the number of pulses set by the pulse setting switch 207 within the time until the reset signal comes from the counter reset timer 205, the start signal output unit 208 is turned on. Output a signal.

The activation signal output unit 208 starts outputting the activation signal when receiving the ON signal, and stops outputting when receiving the reset signal from the counter reset timer 205.

Therefore, when setting the permissible time according to the number of pulses set in the counter reset timer, it is necessary to add the minimum required output duration as the activation signal.

By the way, in the ideal case where the input pulse signal corresponding to the notice chime sound is equal to the pulse interval, as indicated by A in FIG. 3A, the reference pulse output from the reference pulse generator 204 (see FIG. a is shown as B) and the comparison section
If the logical product is taken in 206, the number of pulses equal to the number of input signals (4 in FIG. 3a) can be obtained as an output.

However, as shown by A'in FIG. 3b, the pulse interval of the input pulse signal corresponding to the advance notice chime sound is about 1 second as described above, but when measured in more detail, the first shot and the second shot 2nd and 3rd shots (or 6th and 7th shots) or 3rd and 4th shots (or 7th shots) compared to the interval between the shots (or 5th and 6th shots) The interval of the 8th shot) tends to be shorter. When a logical product of such an actual input signal and a regular reference pulse having a pulse interval of Ti (indicated by B in FIG. 3b) is obtained, a part of the input signal is detected (FIG. 3b). Then, the first shot and the second shot are detected) and other input signals are not detected (Fig. 3b).
Then the third and fourth shots are not detected).

In order to solve the above-mentioned drawbacks, the waveform shaping unit 20 according to the present invention is used.
A compensation time giving unit 210 is provided between 3 and the comparing unit 206. Also, a compensation time giving timer 211 is prepared. The compensation time giving timer 211, triggered by the fall of the signal pulse output from the waveform shaping unit 203, a pulse having a width of a preset time Tc every time the signal pulse is output, the compensation Output to the time assignment unit 210. The compensation time giving unit 210
Then, after the signal pulse output from the waveform shaping section 203, a pulse having a width of Tc is added to the comparison section 20.
Output to 6. As shown in FIG. 3C, after the compensation time Tc is given even to an actual input signal having a non-uniform pulse interval, if the logical product of the reference pulse is obtained in the comparison unit 206, the actual notice chime that has been input. A pulse signal corresponding to a sound can be detected without exception.

In FIGS. 1 and 2, reference numeral 600 denotes a test unit for testing the detection operation of the detection unit 200. The role of this test section is to install a tape recorder or the like that plays back a recording tape containing the actual notice chime sound inside. During the test mode, the recorded notice chime sound is played and this signal is sent to the detection section. It is intended to input and check the operation of the detection unit. Reference numeral 601 is a voice input terminal, and 602 is a test mode setting switch.

When performing a test, first set the test mode setting switch 60
2 is turned on, a recording tape in which only the notice chime sound is previously recorded is reproduced by the external tape recorder, and the reproduced audio signal is input from the audio input terminal 601. However, when the recording tape is reproduced externally, its output level is adjusted to the same low level as when the notice chime sound is actually repeated in the television audio signal. The input reproduced audio signal is superimposed on the audio signal of the television broadcast output from the audio detector 110 in the television section in the mixing section 603 and output to the detection section. As the test method, in addition to the method using the external tape recorder as described above, the method using the internal tape recorder, or the advance chime sound previously stored in the ROM provided internally or externally, and the audio signal is generated from the time of the test. A method of making it possible is also considered.
In FIG. 2, reference numeral 604 is an example of a voice test signal generation unit in the case of incorporating a function for generating a voice test signal by the ROM. ROM
The audio test signal output from the signal generator 605 is adjusted by the level controller 606 to be equal to the level of the actual notice chime sound. Reference numeral 607 is a level meter used again for the level adjustment. Set the test mode setting switch 608 to O
If set to N, the audio test signal output from the level controller is superimposed on the audio signal of the television broadcast output from the audio detector 110 in the television section in the mixing section 603,
It is output to the detector.

FIG. 4 shows a second embodiment according to the present invention. The present embodiment is provided with another emergency alert broadcast detection unit 250 and the activation signal output control unit 700 of the above-mentioned breaking news detection unit 200. In addition,
In this embodiment, the same TV section, test section, and
The description of the details such as the alarm unit is omitted. The activation signal output control unit 700 performs control such as changing the content of the alarm announcement depending on whether the detection result is breaking news or emergency alert broadcasting, changing the type of the alarm lamp, or changing the blinking method. . Needless to say, the test section stores not only the notice chime sound described in the first embodiment but also the signal associated with the emergency alert broadcast.

〔The invention's effect〕

As described above, according to the present invention, it is possible to automatically and accurately detect breaking news in television broadcasting, issue an alarm, and automatically record the contents of breaking news.

Therefore, even if the handler is absent or taking a nap, a wide range of information such as accidents, disasters, social news, etc.
And it is possible to collect surely, and it is possible to establish the system corresponding to them at an early stage.

[Brief description of drawings]

FIG. 1 shows a first embodiment according to the present invention. Figure 2 shows
It is a figure which illustrates the detection part and the test part in the 1st Example of FIG. 1 in detail. FIG. 3 is a diagram for explaining the principle and effect of giving the compensation time. FIG. 4 is a second embodiment according to the present invention. FIG. 5 is a diagram for explaining the operation of the waveform shaping section. 100 …… TV section, 200 …… Detection section, 300 …… Alarm section, 400
...... External recording device startup unit, 500 …… External TV startup control unit, 600 …… Test unit, 101 …… Antenna input terminal, 102 …… Tuner, 103 ……
Channel selection switch, 104 ... video intermediate frequency amplifier, 105 ... video detector, 106 ... video amplifier, 107 ...
Video output circuit, 108 ... Monitor control unit, 109 ... Internal video monitor, 110 ... Audio detector, 111 ... Audio amplifier, 11
2 ... Internal monitor speaker, 201 ... Audio amplifier, 202 ...
… Specific frequency extraction unit, 203 …… Wave shaping unit, 204 …… Reference pulse generation unit, 205 …… Counter reset timer, 206
...... Comparison unit, 207 …… Pulse number setting switch, 208 …… Starting signal output unit, 209 …… Pulse number counter, 210 …… Compensation time giving unit, 211 …… Compensation time giving timer, 250 …… Emergency alert broadcasting Detection unit, 301 ... Alarm announcement control unit, 302 ...
… Speech synthesizer, 303 …… System reset button, 304 ……
Internal speaker, 305 ... Audio amplifier, 306 ... External speaker, 307 ... Alarm lamp control unit, 308 ... Internal alarm lamp, 309 ... External alarm lamp, 401 ... External recording device, 40
2 …… Signal line, 403 …… Signal line, 501 …… Power line, 502 ……
External TV, 601 ... Voice input terminal, 602 ... Test mode setting switch, 603 ... Mixing section, 604 ... Voice test signal generating section, 605 ... ROM signal generator, 606 ... Level controller, 607 …… Level meter, 608 …… Test mode setting switch, 700 …… Start signal output control section.

Claims (3)

[Claims] 1. A device for detecting a so-called breaking news which superimposes information to be breaking by a subtitle super on a general broadcast program following a trailing chime sound that is continuously hit during television broadcasting, A specific frequency extraction unit that extracts only a voice band signal of a specific frequency used in breaking news from a voice signal, a waveform shaping unit that converts one notice chime sound into one pulse, and generation of the pulse A pulse generation interval verification unit that verifies whether or not the interval is repeated and satisfies the standard value of the generation interval of the notice chime sound, and outputs a pulse only when the standard value is satisfied, and counts the output pulse A pulse number counter section, a counter reset timer section for setting the counting period of the output pulse from the pulse generation interval verification section, and the counter reset timer If the count value of the pulse number counter unit matches the number of notice chime sounds included in the actual breaking news during the counting period designated by the section, it is determined that the breaking news is started and an activation signal is output. And a start signal output that activates the television specific signal detecting device. 2. A so-called breaking news, in which information to be flashed by a subtitle super is superposed on a general chime program following a notice chime sound that is repeatedly hit during television broadcasting, a so-called breaking news is detected, and an alarm is issued and recorded. A device for activating the device, comprising: (a) a specific frequency extraction unit for extracting only a voice band signal of a specific frequency used in breaking news from a television audio signal, and one advance chime sound. The waveform shaping unit that converts the pulse into the pulse, and whether or not the generation interval of the pulse satisfies the standard value of the generation interval of the notice chime sound that is repeatedly hit, the pulse is generated only when the standard value is satisfied. A pulse generation interval verification unit for outputting, a pulse number counter unit for counting the output pulses, and a counter reset for setting a counting period of the output pulses from the pulse generation interval verification unit If the count value of the pulse number counter unit matches the number of notice chime sounds included in the actual breaking news during the counting period specified by the timer unit for resetting and the timer unit for resetting the counter, the breaking news is started. A detection unit that outputs a start signal upon determining that (b) an alarm unit that issues an alarm based on the start signal; and (c) an external recording device based on the start signal.
A television specific signal detection device, comprising: a recording start-up unit that outputs a recording start-up signal. 3. During television broadcasting, so-called breaking news is broadcast, in which information to be flashed by a subtitle super following a notice chime sound that is repeatedly hit is superimposed on a general broadcast program to be broadcast, and an alarm is issued and recorded. A device for activating the device, comprising: (a) a specific frequency extraction unit for extracting only a voice band signal of a specific frequency used in breaking news from a television audio signal, and one advance chime sound. The waveform shaping unit that converts the pulse into the pulse, and whether or not the generation interval of the pulse satisfies the standard value of the generation interval of the notice chime sound that is repeatedly hit, the pulse is generated only when the standard value is satisfied. A pulse generation interval verification unit for outputting, a pulse number counter unit for counting the output pulses, and a counter reset for setting a counting period of the output pulses from the pulse generation interval verification unit If the count value of the pulse number counter unit coincides with the number of notice chime sounds included in the actual news bulletin during the counting period designated by the timer timer for timer reset and the timer unit for counter reset, the breaking news alert A detection unit that outputs a start signal upon determination of the start of the (b) an alarm unit that issues an alarm based on the start signal; and (c) an external recording device based on the start signal,
A recording start-up unit that outputs a recording start-up signal, and (d) a test unit that superimposes the same audio signal as the notice chime sound on an audio signal of general television broadcasting and inputs it to the detection unit to perform a test. Characteristic television specific signal detecting device.