KR930006665B1 - Apparatus for recognizing whether tv is activated or not - Google Patents

Abstract

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Description

Viewing status determination device of television receiver

1 is a schematic diagram for explaining the basic configuration of the present invention.

2 is a block diagram of the configuration of one embodiment of the present invention.

3 is a TV broadcast receiving circuit.

4 is a circuit diagram of a television receiver viewing channel consisting of a phase comparison circuit.

5 is an output waveform diagram of a phase comparison unit.

6 is a detection circuit diagram of an on / off state of a power switch of a TV receiver and other equipment.

7 is a circuit diagram of a programmable bandpass filter.

8 shows a synchronization signal comparison circuit.

9 is a voice mixing circuit diagram.

10 is a connection diagram of audio and video.

11 shows a check circuit diagram using the AV terminal.

* Explanation of symbols for main parts of the drawings

101: video sensor (VTR SENSOR) 102: VTR

103: TV 104: power outlet

201: microprocessor unit (MPU) 202: bus

203: Splitter 204: TV broadcast wave receiving circuit

205: synchronous separation circuit 206: phase comparison

207: synchronization signal phase comparison circuit 209: TV sensor

210: amplifier 211: phase detection circuit

212: counter 213: video buffer circuit

214: video analog switch circuit 215: video buffer circuit

216: synchronous separation circuit 217: VTR sensor

218: band pass filter 219: amplifier

220: rectifier 221: voice analog switch circuit

222, 223, 224, 225: voice mixing circuit 226: voice analog switch circuit

227 variable band pass filter 228 low pass filter

229: A / D 8-bit converter 230: Variable bandpass filter

231: low pass filter 232: A / D 8-bit converter

233: current transformer 301: tuner

302: PLL tuner control circuit 303: video, audio block

304: terminal 305: terminal

306: terminal 401: phase comparison church IC

402: Counter IC 403: Latch Memory IC

404: Amplifier 601: TV

602: AC power source 603: transformer (CT)

604: diode 605: capacitor

606: resistor 607: terminal

701: high pass filter 702: low pass filter

703: input terminal 704: output terminal

705: terminal 706: terminal

801: logic circuit 802: amplifier

803: Counter 901: Amplifier

902: Adder 1001: TV

1002: VTR 1003: voice mixer

1004: Bandpass Filter 1005: Video (AV) Switch

1006: speaker 1101: analog switch

In the information age, television broadcasting is widely used as a medium for providing information.

In this case, the provider of the information determines the viewing channel of the television receiver (hereinafter referred to as TV) in order to know how the information is transmitted.

In determining the viewing channel, the TV uses a measuring device called a video meter. The video meter stores and records the time when the TV is turned on or off and the data of the viewing channel.

Recently, however, in addition to watching television broadcasts that are broadcast due to the diversified use of TVs in a normal state, video tape recorders (hereinafter referred to as "VTR"), video games (hereinafter referred to as "GAME"), It is used as a video output of a video disc player (hereinafter abbreviated as "VDP") or a laser disk (hereinafter abbreviated as "CD"), and is used for a variety of purposes. A plurality of input / output terminals of abbreviation "AV" are formed, and a TV is used by directly connecting various devices (VTR, etc.) to the AV terminal.

Accordingly, the determination of the use state of the TV must also correspond to the multipurpose use.

That is, the following cases are assumed as the use state of the TV. (1) watching TV with the TV power on, (2) watching TV through the channel of the VTR with the TV power on, and (3) connected to the TV with the TV power on When the TV is not being played while the VTR is being played or when the TV is used on a display such as a VDP, GAME or CD.

In other words, there are various cases where a TV is in use but a broadcast is not being watched.

Accordingly, an object of the present invention is to provide an apparatus for determining a viewing state of a television receiver capable of discriminating viewing channels of broadcasting by a TV in response to these various cases.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described according to attached drawing.

1 is a system diagram for explaining the basic configuration of the present invention.

In the figure, reference numeral 101 denotes a video sensor (hereinafter, abbreviated as VTR SENSOR) which is a viewing state determination apparatus for a television receiver of the present invention, 102 denotes a VTR, 103 denotes a TV, and 104 denotes a power source for each device. It is an outlet.

Singular or plural same mechanisms other than the VTR 102, for example, GAME, CD, etc., are also identical to the VTR 102 in the drawing, and are connected to the VTR sensor 101 or the TV 103.

In this system diagram, broadcast reception radio waves are input from the antenna ANT (antennas such as VHF-H, VHF-L, UHF, etc.) to the VTR SENSOR 101 and input to the TV 103 through the VTR 102. The SIF (Voice Intermediate) signal detected from the TV speaker 236 (see FIGS. 2 and 10) and the SIF (sound intermediate frequency) sensor 209 of the TV are converted into The erasure signal from the laser sensor 217 is input to the VTR sensor 101.

In addition, an AUDIO and VIDEO (hereinafter abbreviated as AV) signal is input from the VTR 102 to the VTR SENSOR 101, and an AV signal is input to the AV terminal of the TV 103 from the AV output of the VTR SENSOR 101. .

In this configuration, the VTR SENSOR 101 determines which channel of the television broadcast is actually watched from the use state of the VTR 102 and the use state of the TV.

2 is a block diagram showing the configuration of one embodiment of the present invention, that is, the configuration of the VTR sensor 101.

Hereinafter, the configuration and operation of the present invention will be described with reference to FIG.

First, the concepts are explained in order.

The terminal ANT IN is an input terminal from an antenna ANT for receiving a mixed wave of VHF and UHF. The terminal ANT IN receives a broadcast wave from two terminals ANT IN and receives the terminal ANT OUT and the TV through the distributor 203. The broadcast reception wave is distributed to the broadcast wave reception circuit 204.

The terminal ANT OUT is connected to the terminal ANT IN of the VTR 102. The TV broadcast wave receiving circuit 204 separates the received wave from the distributor 203 into a VIDEO signal, a SIF signal, and an AUDIO signal and outputs the received wave.

The synchronizing separation circuit 205 inputs a VIDEO signal from the TV broadcasting wave receiving circuit 204 and outputs a horizontal synchronizing signal separated from the VIDEO signal.

The synchronizing signal phase comparison circuit 207 compares the horizontal synchronizing signal from the synchronizing separation circuit 205 with the horizontal synchronizing signal from the synchronizing separation circuit 216 to be described later, and compares the synchronizing signal comparison pulse with the low pass filter 208. The data is sent to the bus 202 via the microprocessor unit, and transferred to the microprocessor unit (hereinafter, referred to as MPU).

The SIF signal detected by the SIF sensor 209 of the TV is input from the terminal (TV SIF), amplified by the amplifier 210 and output to the phase comparator 206. The phase comparator 206 compares the SIF signal from the TV broadcast receiving circuit 204 and the SIF signal detected by the SIF sensor 209 of the TV and mismatches by the counter 212 through the phase detection circuit 211. The SIF comparison pulse for determining the current reception channel is sent to the bus 202 by counting a signal in the case and confirming a mismatch. The counter reset pulse from the MPU 201 is input to the degree counter 212 via the bus 202.

The other output of the amplifier 210 is input to the voice analog switching circuit 221 described later through the FM detection circuit 235.

The monitor VIDEO signal of the TV 103 from the TV VIDEO OUT is input to the video buffer circuit 213 through the terminal (a), and the monitor VIDEO signal is input from the video buffer circuit 213 through the terminal (b). Output to VIDEO IN of a mechanism other than (103). On the other hand, the video buffer circuit 213 outputs the monitor VIDEO signal to the video analog switch circuit 214.

In addition, the video signal of the VTR 102 from the VTR VIDEO OUT is input to the video buffer circuit 215 through the terminal c, and from the video buffer circuit 215 to the TV AV1 VIDEO IN through the terminal d. Output the VIDEO signal. On the other hand, the video buffer circuit 215 outputs a video signal to the video analog switch circuit 214.

The video analog switch circuit 214 is controlled by a signal of the video analog control from the MPU 201 and its output is bused to the MPU 201 as an on / off signal of the VTR through the synchronous separation circuit 216. A horizontal synchronizing signal is output to the synchronizing signal phase comparator 207 through the synchronizing separation circuit 216 at the same time.

In addition, the VTR erasure signal is input from the VTR erasure sensor 217 to the band pass filter 218 through the terminal e, and the MTR 201 outputs the VTR recording on and off signals through the amplifier 219 and the rectifier 220. Output via the bus 202.

The AUDIO signal is output from the audio analog switch circuit 221 and the individual audio mixing circuit through the terminal f from the TV AUDIO OUT, the terminal g from the VTR AUDIO OUT, and the terminal i from the GAME AUDIO OUT. (222 ~ 225). In the audio mixing circuits 222 to 225, the frequency from the oscillator OSC 237 output through the audio signal and the audio analog switch circuit 226 in each device, for example, 22 Hz (hereinafter referred to as the human ear) The sonication). The voice analog switches 221 and 226 control the voice mixed analog control in the MPU 201 by a signal. This mixed signal is output to the AUDIO IN, TV AV1 AUDIO IN, TV AV2 AUKIO IN, and TV AV3 AUDIO IN of another apparatus via terminals j to m.

The AUDIO signal input to the voice analog switch circuit 221 is encoded by the variable band pass filter 227, the low pass filter 228, and the A / D 8-bit converter 229, and sent to the bus 2. do.

The AUDIO signal of the TV broadcast wave receiving circuit 204 is also encoded through the variable band pass filter 230, the low pass filter 231, and the A / D 8-bit converter 232, and sent to the bus 202. .

The variable band pass filters 227 and 230 are controlled by the band pass frequency from the MPU 201 and are so-called programmable band pass filters.

The output from the TV speaker 236 is input to the high pass filter 234 through the terminal n, and the components of the ultrasonic wave pass, so that only the ultrasonic signal is input to the voice analog switch circuit 221.

The power supply of the TV 103 is detected by the current transformer 233 through the terminal o of the TV and the on / off signal, which is a change in the power current by turning on and off, and is supplied to the bus 202 as a TV ON / OFF signal. Send it out.

The on / off of the GAME power supply detects the current transformer 233 via the terminal p of the GAME ON OFF signal, which is a change in power supply current, and sends it to the bus 202 as a GAME ON / OFF signal.

The VTR and ON / OFF signals, which are changes in power supply current due to the on / off of the VTR power supply, are detected by the current transformer 233 through the terminal q along the driving of the mechanism part (tape), and the VTR mechanism part ON / OFF is detected. The signal is sent to the bus 202 as a signal.

Next, the overall operation of the VTR SENSOR 101 of FIG. 2 will be described in the following order. (a) Detecting which mechanism is being used, (b) Determining the viewing channel when only the TV is used, (c) Determining the viewing channel of the TV via the VTR channel by using the empty channel, and (d) Determination of the type of TV viewing used, (e) Others

(a) Detecting which mechanism is being used

The change in the power supply current flowing through the power supply of the TV 103, power supply such as GAME, and power supply when recording and reproducing VTR is detected by the current transformer 233 and sent to the bus 202 as an ON / OFF signal.

(b) Determination of the viewing channel when using only TV

In response to a tuner control signal from the MPU 201 via the bus 202, the TV broadcast receiving circuit 204 scans the broadcast channel sequentially. The SIF signal detected by the SIF sensor 209 of the TV is input from the terminal (TV SIR), amplified to the drive level by the amplifier 210, and output to the phase comparator 206. The phase inversion channel 206 is in phase by comparing the SIF signal from the TV broadcast wave receiving circuit 204 with the SIF signal from the TV. If the scan channel and the reception channel match, and are not in phase, 4.5 MHz The phase difference of the FM-modulated frequency ΔF is output with respect to the intermediate frequency of, and the number countered by the counter 212 through the phase detection circuit 211 is confirmed at a constant synchronization and outputs a mismatch signal to determine the current reception channel. The SIF comparison pulse is sent to the bus 202.

(c) Determination of the viewing channel of the TV through the VTR channel by using the empty channel.

In Korea, when a VTR tuner is used, a broadcast channel is watched through an empty channel of three or four channels. When the empty channel is used, the VTR modulator is remodulated so that the image looks the same in the human eye, and the sound in the human ear is the same. However, in the above-described SIF comparison, 4.5 MHz of SIF does not coincide. Therefore, i) First, it is checked whether or not the power supply of the VTR 102 is on (except for the operation of the mechanism unit). The VIDEO signal is input from the VTR VIDEO OUT to the analog switch circuit 214 through the terminal c and the video buffer circuit 215. From the video signal passing through the video analog switch circuit 214, only the horizontal synchronizing signal is extracted through the synchronizing separation circuit 216, and the VTR ON and OFF signals are sent to the bus 202. ii) The SIF signal from the TV broadcast wave receiving circuit 204 is compared with the SIF signal of the TV in the phase comparison channel 206. However, since they do not coincide, the detection of all broadcasting channels is performed, and then the procedure is shifted to AUDIO comparison. iii) The AUDIO signal from the TV broadcast wave receiving circuit 204 outputs a constant spectrum of energy from the variable band pass filter 230, directs it from the low pass filter 231, and converts the A / D 8-bit converter ( The signal is converted into a digital signal at 232 and sent to the bus 202.

On the other hand, the SIF signal from the SIF sensor 209 of the TV is amplified by the amplifier 210, FM detected by the FM detection circuit 235, and input to the voice analog switch circuit 221. In the same manner as described above, the variable band pass filter 227 outputs a constant spectrum of energy, direct-flows the low pass filter 228, converts it into an A / D 8-bit converter digital signal, and sends it to the bus 202. . The digital signal converted from the AUDIO signal received by the TV 103 and the AUDIO signal received by the TV broadcast wave receiving circuit 204 is processed by the MPU 201, and the viewing channel is judged based on the match and the discrepancy of the channels. Is doing iv) In this audio spectrum comparison method, however, even if the viewing channel is wrong, it is difficult to determine a plurality of identical AUDIO spectrums when the same broadcast is performed. In this case, the horizontal synchronizing signal from the synchronizing separation circuit 205 and the horizontal synchronizing signal from the synchronizing separation circuit 216 are compared in phase in the synchronizing signal phase comparison circuit 207 to generate a synchronizing signal comparison pulse. ) To determine the viewing channel.

(d) Determination of TV viewing type using AV terminal

From the VTR AUDIO OUT, the AUDIO signal is input to the voice analog switch circuit 221 and the voice mixing circuit 223 through the terminal g. The voice mixing circuit 223 mixes the AUDIO signal with the ultrasonic wave from the OSC 237 outputted through the voice analog switch circuit 226 controlled by the voice mixing analog control signal from the MPU 201. The mixed signal is output to the TV AV1 AUDIO IN via the terminal k.

The TV speaker 236 inputs the mixed AUDIO signal through the terminal n to the high pass filter 234, and outputs only an ultrasonic signal to determine the use state of the AV terminal.

That is, when this AV terminal is used, the MPU 201 controls the audio analog switch 221 to output the AUTIO signal from this VTR AUDIO OUT through the terminal g and the audio analog switch 221. The variable band pass filter 227 is output.

The variable band pass filter 227? Low pass filter 228? A / D 8-bit converter 229? Bus 202? MPU 201?

On the other hand, the AUDIO signal from the TV broadcast wave receiving circuit 204 is variable band pass filter 230 → low pass filter 230 → low pass filter 231 → A / D 8-bit converter 232 → bus 202 →. MPU 201 is processed in order.

The digital signal converted from the AUDIO signal received by the TV 103 and the AUDIO signal received by the TV broadcast wave receiving circuit 204 is processed by the MPU 201. Judgment of the viewing channel.

TVs generally used are provided with a plurality of AV terminals, so that a plurality of mixing circuits 222 to 225 are provided and sequentially scanned to check all AV terminals. This scanning controls the voice analog switch circuits 221 and 226 by means of a voice mixed analog control signal from the MPU 201 via the bus 202.

(e) other

The VTR erases the VTR tape by always operating the erase head during recording.

In the on state, the erasure signal from the VTR erasure sensor 217 is input through the terminal e, and the VTR recording on signal from the high pass filter 218 to the amplifier 219 to the rectifier 220 is transferred to the bus ( 202). When there is an erasure signal input from the pre-erase head, the VTR is determined to be in a recording state, and the VTR recording channel is determined by comparing the AUDIO signal of the VTR with the AUDIO signal of the TV broadcast wave receiving circuit.

The VTR is judged to be in a regenerating state when the regenerating state of the VTR is checked and the VTR mechanism part is on and the laser signal is not present.

As described above, in the above embodiment, the state of the AV output terminal of each device, such as a TV and a VTR, and the on / off state of each device power supply are input to the MPU 201 via the bus 202, and the use state of each device is provided. From this, the viewing channel of the TV is determined, and the actual viewing channel is determined for the diversified TV.

Next, major circuits among the circuits shown in FIG. 2 will be described in more detail with reference to FIGS. 3 to 11.

3 shows a TV broadcast wave receiving circuit. This TV broadcast wave receiving circuit 204 is composed of a tuner 301, a phase locked loop (PLL) tuner control circuit 302, and a VIDEO and AUDIO block 303. The clock pulse from the MPU 201 is input from the terminal 305 to the PLL tuner control circuit 302. The PLL tuner control circuit 302 gives a tuner control signal to the tuner 301. The tuner 301 receives the broadcast wave signal from the terminal ANT through the distributor 203 (see FIG. 2), scans it with the signal from the MPU 201, and the terminal 306 of the VIDEO, AUDIO block 303. ) Outputs VIDEO signal, AUDIO signal, and SIF signal.

4 shows a TV receiver viewing channel determination circuit serving as a phase comparison circuit. The TV receiver viewing channel determination circuit is composed of a PLL IC 401, a counter IC 402, a memory IC 403, and an amplification IC 404. The SIF signal from the SIF sensor 209 of the TV is amplified and input to the driver level of the IC 401 for the PLL, and the SIF signal from the TV broadcast wave receiving circuit 204 is also amplified and the PLL IC 401 ) Is entered. The phase of the SIF signal from the SIF sensor 209 of the TV and the SIF signal from the TV broadcast wave receiving circuit 204 is compared. If the phase is in phase, a constant output signal appears as shown in Fig. 5A, If not in phase, as shown in FIG. 5B, the phase difference of ΔF FM modulated with respect to the intermediate frequency of 4.5 MHz is output. This output is heavily amplified by the amplifying IC 404 and predetermined synchronization counter is counted by the counter IC 402 to determine that it is inconsistent. This determination determines and outputs a viewing channel by scanning each channel of the TV 103.

6 shows a detection circuit of on and off states of a power switch of a TV receiver and other mechanisms.

A current transformer CT 603 is inserted between a TV, a VTR game, etc., 601 and a direct current power source (100-220V) 602. When the power switch of the TV, VTR game, etc. 601 is turned on, the output of the current transformer 603 is rectified by the diode 604, smoothed by the capacitor 605 and the resistor 606, and the direct current voltage is applied to the output terminal 607. Outputs

7 shows the configuration of a variable bandpass filter which is a programmable bandpass filter. The variable band pass filters 230 and 227 combine a two filter of the high pass filter 701 and the low pass filter 702 to form a band pass filter. In addition, a control signal is supplied from the MPU 201 to the terminal 705 of the band pass filter 701 and the terminal 706 of the low pass filter 702 via the bus 202 so that the variable band pass filter 230, 227 ) Is controlled. The variable band pass filters 230 and 227 output spectral energy of a constant frequency to the output terminal 704.

8 shows a synchronizing signal phase comparator 207 comprising a logic circuit 801, an amplifier 802, and a counter 803, and the TV horizontal synchronizing signal from the synchronizing separation circuit 216 and the synchronizing separation circuit 205. FIG. After inputting the horizontal synchronizing signal from < RTI ID = 0.0 >) < / RTI > The count of the vertical synchronization signal counter 803 of the TV broadcast wave receiving circuit 204 is also reset. This allows the viewing channel to be determined by the horizontal synchronization signal when a plurality of the same AUDIO spectrums are generated.

9 shows a speech mixing circuit. The voice mixing circuits 222 to 225 input an AUDIO signal to the terminal AUDIO IN, amplify it in the amplifier 901, and then mix the ultrasonic wave from the OSC 237 in the adder 902 and output it from the terminal AUDIO OUT.

10 shows a connection diagram of audio and video. In this figure, when the video (AV) switch 1005 of the TV 103 is turned on, the mixed signal obtained by mixing the AUDIO signal and the ultrasonic wave from the VRT AUDIO OUT of the VTR 102 to the TV speaker 236. Is output. If the output from the TV speaker 236 is directly extracted from a microphone or directly outputted by the antipass filter 234, it is possible to determine whether the AV terminal of the TV 103 is being used.

11 shows a check circuit for using an AV terminal. In the drawing, each AUDIO is inputted by inputting two-bit digital signals, which are voice mixed analog signals from the MPU 201, to the input terminals A and B of the voice analog switch circuits 221 and 226. The IN and the respective voice mixing circuits 222 to 225 are sequentially selected in correspondence with each other, whereby the use state of the AV terminal can be known. When AUDIO IN is from VTR, as described above, the AUDIO component is outputted to the variable band pass filter 227.

As described above, the present invention can determine the use state of various television receivers.

Claims (1)

An apparatus for determining the viewing state of a television receiver in a video system comprising a video tape recorder, a video disk player, a video game, or a laser disk connected to a television receiver, and having various apparatuses related to video, such as a video receiver. Means for determining the viewing channel of the television receiver by comparing the audio intermediate frequency with the audio broadcast frequency signal from the TV broadcast wave signal in the viewing state determination device, and the spectrum and video of the audio signal from the TV broadcast wave receiving circuit. Means for determining the viewing channel of the television receiver through the video tape recorder by comparing the spectrum of the audio signal from the tape recorder, means for determining the usage state of the audio receiver and the video terminal of the television receiver and the various apparatuses; Recording Video Tape Recorders And a means for judging a playback state.

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