JPH0969820A - Data receiving device - Google Patents

Abstract

(57) [PROBLEMS] To provide a signal receiving device which, when receiving data superimposed on a program or CM, cannot receive the data unless there is a person on the spot. A transmission signal on which digital data is superimposed is supplied to an input terminal 1 and is input to a data extraction unit 3 via a switch 5. The data extraction unit 3 extracts digital data from the transmitted signal and stores the extracted data in the memory 4. A control signal indicating whether or not there is an instruction to save data is supplied to the input terminal 2 to control the switch 5. When there is an instruction to store data from the input terminal 2, the signal on which the digital data is superimposed is input to the data extraction unit 3 to extract the data, which is stored in the memory 4, and when there is no instruction to store the data. Causes no signal to be supplied to the data extraction unit 3. In this way, the digital data superimposed on the transmission signal can be extracted and stored only when there is an instruction to save the data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data receiving apparatus for receiving a digital signal from a transmission signal in a system for transmitting information by superimposing digital data on broadcasting such as TV and radio.

[0002]

2. Description of the Related Art Conventionally, there is a system for transmitting and receiving a signal by superimposing an additional signal on a signal to be transmitted and received. For example, in USP 4,807,031, the television signal and the digital data are simultaneously transmitted by superimposing the digital data on the television signal and transmitting and receiving the same.

The principle of this digital data transmission / reception system is, for example, in the case where, in a field of a video signal, a raster forming a horizontal scanning line is alternately bright and dark modulated line by line, and not modulated. , 0 and 1 are distinguished and transmitted. On the side of the receiver, the data is discriminated by using a photodiode based on whether or not the above-mentioned raster luminance is modulated.

A block diagram of this data receiving device is shown in FIG. In FIG. 7, the data receiving apparatus comprises a converter 16 for detecting the raster luminance from the television and a receiving circuit 56 for demodulating the detected signal into digital data.
The raster intensity modulation signal is detected by the photodiode 18 in the converter 16 and amplified by the amplifier 58. The amplified signal extracts the energy within the luminance modulation frequency of 7,867 kHz by the band-pass filters 60, 62, and smoothes it by the full-wave rectifier 64. The level comparator 66 compares the smoothed signal with a reference voltage to demodulate digital data. The received digital data is modulated again by the IR modulator 68, the IR energies 32a to 32c are emitted by the IREDs 26, 28 and 30, and the signal is wirelessly transmitted to other devices.

Using such a system, programs and commercials
When transmitting the information that the user has seen or heard, it is necessary to have a configuration in which when the information is transmitted, the information cannot be received unless there is a person on the spot. However, such a thing has not been considered in the past.

[0006]

As described above, in the conventional data transmission / reception system, only a person who receives data even if he / she is not watching the program or the CM on which the digital data is superposed is watching the program or the CM. You can illegally receive the benefits that can be received.

It is an object of the present invention to provide a signal receiving device which, when receiving data superimposed on a program or CM, cannot receive the data unless there is a person on the spot.

[0008]

In order to achieve the above object, in a data receiving apparatus of the present invention, in a receiving apparatus for receiving a transmission signal on which digital data is superposed, data for extracting the superposed digital data. It is characterized in that it comprises an extraction means, a storage means for storing the data extracted by the extraction means, and an instruction means for instructing the storage of the data in the storage means.

By the above means, when the digital data is received, the data is stored only when there is an instruction to save the data, so that when the data is received, the viewer can receive the data only on the spot. Become.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a circuit configuration diagram for explaining a first embodiment of the present invention. In FIG. 1, a transmission signal on which digital data is superimposed is supplied to the input terminal 1, and is input to the data extraction unit 3 via the switch 5. The data extraction unit 3 extracts digital data from the transmitted signal and stores the extracted data in the memory 4. A control signal indicating whether or not there is an instruction to save data is supplied to the input terminal 2 to control the switch 5.

Thus, when there is an instruction to store data from the input terminal 2, the signal on which the digital data is superimposed is input to the data extraction unit 3 to extract the data, which is stored in the memory 4 to store the data. When there is no instruction to store, no signal is supplied to the data extraction unit 3.

In this embodiment, the digital data superimposed on the transmission signal can be extracted and stored only when there is an instruction to save the data.

Although the switch 5 is set between the input terminal 1 and the data extracting section 3, it may be set between the data extracting section 3 and the memory 4. The memory 4 is not limited to a semiconductor and may be any non-volatile storage means such as a magnetic recording medium.

The second aspect of the present invention will be described with reference to the circuit configuration diagram of FIG.
Embodiment will be described, but the same components as those in the embodiment of FIG.

In FIG. 2, a transmission signal on which digital data is superimposed is supplied to the input terminal 1, and this data is input to the data extraction unit 3. The digital data extracted by the data extraction unit 3 is stored in the memory 4.

The time counting unit 7 counts a predetermined time after the data output from the data extracting unit 3 starts to be stored in the memory 4, and the erase signal generating unit 6 receives a signal from the time counting unit 7. After a predetermined time has passed since the data was stored in the memory 4, an erase signal for erasing the digital data stored in the memory 4 is generated. The erase signal is
It is supplied to the memory 4 via the switch 5.

A control signal indicating whether or not there is an instruction to save data is supplied to the input terminal 2 to control the switch 5. Thus, when there is no instruction to store the data within a predetermined time after the data is stored, the erase signal is supplied to the memory 4 to erase the data. When instructed, the data is stored as it is without supplying the erase signal to the memory 4.

In this embodiment, since the stored digital data is erased when there is no instruction to save the data, the digital data can be saved only when the instruction to save the data is given.

Although the switch 5 is provided between the erase signal generating means 6 and the memory 4, it may be provided between the time counting section 7 and the erase signal generating section 6. Further, instead of erasing the digital data stored in the memory 4, the digital data extracted next may be overwritten.

A third embodiment of the present invention will be described with reference to the circuit configuration diagram of FIG. In FIG. 3, a transmission signal on which digital data is superimposed is supplied to the input terminal 1, and this data is input to the data extraction unit 3. The digital data extracted by the data extraction unit 3 is stored in the memory 4.

The comparator 8 compares the extracted digital data output from the data extraction unit 3 with the data stored in the memory 4, and if the data is different, displays it on the display 9.

On the broadcasting station side, the same digital data is repeatedly transmitted during the same program or CM and another data is repeatedly transmitted when the program or CM changes. The reason why the same data is repeatedly transmitted is that the receiver can receive the data at any time if the receiver makes a reception error or during the program or CM.

In this embodiment, the receiver always receives and stores data, and when different data is received, it is displayed on the display unit, so that the viewer is notified that the program or CM has been changed and the data is saved. Can be prompted to do.

The display 9 is not limited to a display method such as an LED and the like, and also has a voice, a code display on a display unit, a character display, etc.

A fourth embodiment of the present invention will be described with reference to the circuit configuration diagram of FIG. In FIG. 4, the transmission signal on which the digital data is superimposed is supplied to the input terminal 1 and input to the data extraction unit 3 to extract the digital data. The digital data extracted here is stored in the memory 4.

The comparator 8 compares the digital data extracted by the data extraction unit 3 with the data stored in the memory 4. The time counting unit 7 counts a predetermined time after different data is input to the comparator 8 and displays a message on the display 9 during that time. In addition, the erase signal generator 6
In response to a signal from the time counting section 7, generates an erase signal for erasing the digital data stored in the memory 4 after a predetermined time has elapsed since different data was input. The erase signal is supplied to the memory 4 via the switch 5.

A control signal indicating whether or not there is an instruction to save data is supplied to the input terminal 2 to control the switch 5. When there is no instruction to save the data within a predetermined time after the different data is input, the data is erased, and when the instruction is given, the data is saved as it is.

In this way, the receiver can alert the viewer whether or not to save the data, and the digital data can be saved only when there is an instruction to save the data.

FIG. 5 is a circuit configuration diagram for explaining the fifth embodiment of the present invention. In FIG. 5, a transmission signal on which digital data is superimposed is supplied to the input terminal 1 and input to the data extraction unit 3. The digital data extracted here is stored in the memory 4 as well as in the memory 10 via the switch 5.

The comparator 8 compares the extracted digital data with the data stored in the memory 4, and the time counting unit 7 counts for a predetermined time after the different data is input, and a message is displayed on the display 9 during that time. indicate. Also,
The erase signal generator 6 receives a signal from the time counter 7 and, after a predetermined time elapses after different data is input,
An erase signal for erasing the digital data stored in the memory 4 is generated to erase the data stored in the memory 4.

A control signal indicating whether or not there is an instruction to save data is supplied to the input terminal 2 to control the switch 5. As a result, the data stored in the memory 4 is stored in the memory 10 only when there is an instruction to store the data within a predetermined time after the different data is input.

As described above, the receiver can alert the viewer whether or not to save the data, and the digital data can be saved only when there is an instruction to save the data.

FIG. 6 is a circuit configuration diagram for explaining the present invention more specifically. In FIG. 6, (a) is a configuration diagram of a transmission device and (b) is a configuration diagram of a reception device. Input terminal 11
Is supplied to a band limiting filter (BEF) 12 and the band limiting filter (BEF) 12 limits the 7 kHz portion, for example. The output of the band limiting filter 12 is input to the combiner 13. The synthesizer 13 synthesizes a voice signal and a digital data signal, which will be described later, and outputs the synthesized signal from the output terminal 14.

Digital data to be transmitted is input to the input terminal 15, and the modulator 16 modulates the carrier.
The digital data signal output from the modulator 16 is band-limited by a band pass filter (BPF) 17 and supplied to the adder 13 in the next stage.

The carrier used in the modulator 16 is input from the input terminal 21 through the gate circuit 23. The gate circuit 23 conducts / non-conducts the carrier input to the input terminal 21 by the gate pulse GP supplied to the input terminal 22, and passes the carrier for 0.5 seconds at intervals of, for example, 1 to 3 seconds. As a result, the carrier in burst form
It is supplied to the modulator 16. The burst carrier may be a continuous carrier.

As described above, the television audio signal in which the digital data signal is multiplexed in a part of the frequency band in the reproduction band is processed by the television transmitting device and transmitted together with the television signal.

On the other hand, on the receiving device side, a digital data signal is extracted from the reproduced audio signal.
That is, the speaker of the television receiver 31 outputs a reproduced audio signal in which digital data is multiplexed in a part of the frequency band. This reproduced audio signal is sent to the microphone 4
1 is picked up and amplified by the amplifier 42,
It is extracted by the bandpass filter 43. The extracted digital data signal is input to the decoder 44. In this decoder 44, demodulation processing is performed using the reproduced carrier,
The demodulated data is input to the memory circuit 4 via the switch 5. A control signal indicating whether or not there is an instruction to save data is supplied to the input terminal 2 to control the switch 5. As a result, the digital data is stored in the storage circuit 4 only when there is an instruction to save the data.

The reproduction carrier is obtained as follows. The output of the bandpass filter 43 is input to the sync separation circuit 46. The sync separation circuit 46 detects the presence or absence of carriers, that is, detects the timing of the preceding gate pulse, and controls the switch 47 to turn on and off. When the switch 47 is turned on, the modulation signal is taken into the phase lock loop circuit 48 from the output side of the bandpass filter 43. The phase lock loop circuit 48 performs a phase comparison between the reproduced carrier that is continuously generated internally and the introduced modulated signal, and operates so that the reproduced carrier is phase-locked to the carrier of the modulated signal.

In the above system, the digital data receiving device may be prepared separately from the existing television receiver, or may be of a type incorporated. Further, although the audio transmission system of the television receiver is used, it can be easily applied to the audio transmission system by radio. Further, in the above description, the acquisition of the audio signal for data demodulation has been described as being taken in from the microphone 41, but the present invention is not limited to this, and the audio signal may be acquired by inserting a jack into the audio output line. Of course.

Next, an example using a digital data transmission / reception system will be described. CM of the program sponsor
A code (coupon code) for discounting a specific product may be superimposed and sent during the period. Then, the viewer side receives the coupon code while watching the CM. Receiving the coupon code is proof that the user was watching or listening to the CM. The user saves the coupon code in the memory so that when purchasing the specific product,
You can get the discount by presenting the coupon code to the retailer.

[0041]

As described above, according to the present invention, when the data superimposed on the program or CM is received, the digital data is superimposed by preventing the data from being received unless there is a person on the spot. It is possible to prevent data from being received without watching a program or CM, and to illegally receive a privilege that only the person who is watching the program or CM can receive.

[Brief description of drawings]

FIG. 1 is a circuit diagram for explaining an embodiment of a signal receiving device of the present invention.

FIG. 2 is a circuit diagram for explaining a first other embodiment of the present invention.

FIG. 3 is a circuit diagram for explaining a second another embodiment of the present invention.

FIG. 4 is a circuit diagram for explaining a third other embodiment of the present invention.

FIG. 5 is a circuit diagram showing a fourth another embodiment of the signal receiving device of the present invention.

FIG. 6 is a circuit diagram showing a specific embodiment of the signal receiving apparatus of the present invention.

FIG. 7 is a circuit diagram for explaining a conventional signal receiving device.

[Explanation of symbols]

1 ... input terminal, 2 ... input terminal, 3 ... data extraction section, 4,
10 ... Memory, 5 ... Switch, 7 ... Time counting section, 6
... erase signal generating means, 8 ... comparator, 9 ... indicator.

Claims (7)

[Claims] 1. A receiving device for receiving a transmission signal on which digital data is superimposed, a data extracting means for extracting the superimposed digital data, a storage means for storing the data extracted by the extracting means, A data receiving device comprising: an instruction unit for instructing storage of data in a storage unit. 2. A receiving device for receiving a transmission signal in which digital data is repeatedly superposed, data extracting means for extracting the superposed digital signal, and storage means for storing the data extracted by the extracting means. A time counting means for counting a predetermined time after starting to store the data in the storage means; an erasing means for erasing the data stored in the storage means after a predetermined time has passed; and a storage of the received digital data. Instructing means for instructing whether to store in the storage means, and erasing or overwriting the data recorded in the storage means when an instruction is given to always extract the data and save the data within a predetermined time And a data receiving device. 3. A receiving device for receiving a transmission signal in which digital data is repeatedly superposed, data extracting means for extracting the superposed digital data, and storage means for storing the data extracted by the extracting means. Comparing means for comparing the data extracted by the extracting means with the data stored in the storing means, and based on the comparison result of the comparing means, when the received data is different from the stored data, A data receiving device comprising a means for outputting a message. 4. The erasing or overwriting of data from the storage means is stopped when an instruction to save data is given within a predetermined time after the message is issued. Data receiver. 5. The data in the storage means is stored in another storage means when an instruction to save the data is given within a predetermined time after the message is issued. The data receiving device described. 6. The data receiving apparatus according to claim 5, wherein the data stored in said storage means is erased or overwritten after a lapse of a predetermined time from the output of said message. 7. A part of a frequency band within a band of an audio signal,
In a receiving device for receiving a transmission voice signal in which digital data is repeatedly superimposed, a data extracting unit that extracts the superimposed digital data from a voice signal, a storage unit that stores the data extracted by the extracting unit, A data receiving apparatus comprising: an instruction unit for storing the data in the storage unit only when an instruction for storing the data is given.