JPH0622230A - Television receiver - Google Patents

Abstract

PURPOSE:To provide a television receiver displaying a reproduced pattern from a VTR by only setting the VTR to the reproduction mode. CONSTITUTION:The television receiver is provided with circuits 22, 23 outputting a signal representing a level of a broadcast signal and with circuits 54-56 extracting a synchronizing signal from a broadcast signal and an inputted video signal, with a circuit 51 which learns the state of the VTR reproduction and the state not using the VTR based on a signal representing a level of a broadcast signal, the synchronizing signal and a channel selection signal used to select a reception channel and estimates the mode of the VTR when the VTR is set to the reproduction mode based on the result of learning. When the VTR is estimated to be set in the reproduction mode, the reproduced video signal of the VTR is selected and reproduced as a pattern.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver in consideration of VTR connection.

[0002]

2. Description of the Related Art There are the following two methods for connecting a VTR to a television receiver at home. That is, the reproduced signal of the VTR is converted into a broadcast wave signal of an empty channel, for example, the second channel in the Kanto region, and this is supplied to the antenna terminal of the television receiver. The reproduction signal of the VTR is supplied to the video input terminal (line input terminal) of the television receiver as it is in the base band.

[0003]

However, in the case of, not only is the playback key of the VTR pressed during playback of the VTR, but the antenna selector switch of the VTR is also switched to the VTR side and the television receiver is set to the second channel. Need to switch to. Also, in the case of, it is necessary to switch the input switch to video input in addition to pressing the playback key of the VTR when playing the VTR.

Therefore, in either case, the operation for reproducing the VTR is troublesome, and it is difficult for a person who is not good at this kind of equipment to understand the operation.

Therefore, as a remote control transmitter of a VTR,
It is considered that when the reproduction key is pressed, a remote control signal for switching the VTR to the reproduction mode is output and a remote control signal for switching the television receiver to the second channel or video input is output.

However, in this case, when the VTR and the television receiver are different manufacturers, the television receiver does not respond to the remote control transmitter of the VTR, and as a result, the playback screen cannot be viewed. Further, the key operation on the VTR main unit only causes the VTR to enter the reproduction mode, and the television receiver cannot be switched, so that the reproduction screen cannot be viewed.

The present invention is intended to solve the above problems.

[0008]

Therefore, in the television receiver of the present invention, when the user executes the VTR reproduction, the reproduction state is learned regardless of which method the VTR is connected to. After that, the user VT
When R playback is executed, VTR is
The signal from is automatically switched.

That is, when the reference numerals of the respective parts correspond to the embodiments described later, the circuits 22 and 23 for outputting the signal indicating the level of the broadcast wave signal and the synchronizing signal are extracted from the broadcast wave signal or the input video signal. From the circuits 54 to 56, the signal indicating the level of the broadcast wave signal, the synchronization signal, and the channel selection signal for selecting the receiving channel, the state during reproduction of the VTR 10 and the state in which the VTR 10 is not used are learned. , A circuit 51 for estimating the VTR 10 in the reproduction mode based on the result of the learning.
When it is estimated that the TR10 is in the playback mode, V
The reproduction video signal of TR10 is selected and reproduced as a screen.

[0010]

Operation: The normal state of the television receiver 20 and the VTR 10
When it is estimated that the VTR10 is set to the reproduction mode by learning the state during the reproduction of the VTR10, the input is automatically performed on the VTR10.
Is switched to.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 2 and 1, 10 is a VTR, 20
Indicates a television receiver. The VTR 10 has a general configuration. The broadcast wave signal received by the antenna 1 is supplied from the antenna terminal 11 to the recording / reproducing circuit 13 through the distributor 12 to generate a video signal (and an audio signal). Recording / playback is performed. Then, a baseband video signal is output from the recording / reproducing circuit 13,
This video signal is taken out to the video output terminal 14.

Further, the broadcast wave signal from the distributor 12 is supplied to the switch circuit 15 and the recording / reproducing circuit 1
The video signal from 3 is supplied to the RF modulator circuit 16 and converted into a broadcast wave signal of an empty channel, and this broadcast wave signal is supplied to the switch circuit 15. The "empty channel" referred to here is a channel of the broadcast wave signal output from the RF modulator circuit 16,
For example, it is the second channel in the Kanto region and the third channel in the Kansai region.

The switch circuit 15 is connected to the VTR by the microcomputer 17 for system control.
10 is switched according to the operation mode. For example, in the reproduction mode, the signal from the RF modulator circuit 16 is taken out as a switch output, and in the stop mode, the broadcast wave signal from the distributor 12 is switched. The broadcast wave signal extracted as an output and extracted from the switch circuit 15 is extracted to the RF output terminal 18. Reference numeral 19 represents an operation key such as a reproduction key.

The television receiver 20 is constructed according to the present invention, and the broadcast wave signal from the terminal 18 of the VTR 10 is supplied to the antenna terminal 21. Further, if necessary, the video signal from the terminal 14 of the VTR 10 is supplied to one of the first and second video input terminals 31 and 32, and another video device (not shown).
The video signal from is supplied to the other.

The broadcast wave signal from the terminal 21 is supplied to the tuner circuit 22 and converted into an intermediate frequency signal,
The intermediate frequency signal is supplied to the image detection circuit 24 through the image intermediate frequency circuit 23 to extract the baseband video signal, and the video signal is supplied to the switch circuit 25. The switch circuit 25 is a switch circuit for input switching, and is also supplied with the video signals supplied to the terminals 31 and 32.

Then, in the switch circuit 25, the video signal supplied thereto is selected, and the selected video signal is supplied to the video circuit 26 and subjected to processing such as color demodulation and the three primary color signals are extracted. The three primary color signals are supplied to the color picture tube 27.

Further, in the receiver 20, 41 is a microcomputer for system control, 42 is an operation key such as a reproduction key, 43 is a receiving circuit of a remote controller, 4
4 is a receiving element for the remote control signal, in this example,
Since it is an infrared remote controller, it shows a light receiving element for the infrared light, and outputs of the operation keys 42 and the receiving circuit 43 are supplied to the microcomputer 41.

Then, according to the operation of the key 42 or a remote control transmitter (not shown), the tuning signal SCH is supplied from the microcomputer 41 to the tuner circuit 22 to switch the channel, and the microcomputer 41 switches the switch circuit 25. Is supplied with the control signal SSW to switch the switch circuit 25.

Further, reference numeral 51 indicates a neuro-AI circuit, in this example, a neuro-AI microcomputer. Then, the tuner circuit 22 and the intermediate frequency amplifier 23
AGC voltages S22 and S23 are taken out from the AGC voltage S22 and S23, respectively.
3 and is converted into digital signals S22 and S23, and these signals S22 and S23 are supplied to the microcomputer 51 as a signal indicating the reception level of the reception channel selected by the tuner circuit 22.

The video signal from the detection circuit 24 and the video signals from the terminals 31 and 32 are synchronized with each other by the sync separation circuit 5.
4, 55, 56 are supplied to the respective synchronizing signals S54, S55, S56 from the respective video signals, and these synchronizing signals S54-S56 indicate whether or not there is a video signal providing these synchronizing signals S54-S56. The signal is supplied to the microcomputer 51.

Further, the tuning signal SCH is the tuner circuit 2
2 is supplied to the microcomputer 51 as a signal indicating the selected channel, and the control signal SSW is supplied as a signal indicating the connection position of the switch circuit 25 to the microcomputer 51.
Is supplied to.

Then, the microcomputer 51 learns and infers the current operating state of the VTR 10 from each signal supplied thereto, and supplies the inference output to the microcomputer 41. In the microcomputer 41, the inference from the microcomputer 41 is made. The tuner circuit 22 and the switch circuit 25 are controlled according to the output.

The inference in the microcomputer 51 is performed by the microcomputer 51, for example, in the routine 100 shown in FIGS.
It is realized by executing ~ 300.

Although the processing in the following description is executed by the microcomputer 51, switching of the receiving channel in the tuner circuit 22 and switching of the switch circuit 25 are performed by the microcomputer 5 via the microcomputer 41.
1 is executed, that is, the microcomputer 51 is instructed and executed by the microcomputer 51.

First, the microcomputer 51 executes the routine 100 to learn the receiving state of the television broadcast, and the receiving level of each channel is registered in the level table LVLT as shown in FIG. 10, for example.

That is, when the power of the receiver 20 is turned on, the receiving channel of the tuner circuit 22 is set to the first channel in step 101 of the routine 100, and then the synchronizing signal S54 is set in step 102.
Whether or not the current reception channel is broadcasting is judged from the presence or absence of
Data indicating the reception level of the broadcast wave signal is formed from the magnitudes of the GC voltages S22 and S23, and this data is stored in a memory (not shown) of the microcomputer 51 as shown in FIG. It is written in the prepared level table LVLT.

Subsequently, in step 103, the reception channel is raised by one channel, and then in step 104, it is checked whether step 102 has been executed for all the reception channels. If not executed, the process proceeds to step. Return to 102.

When step 102 has been executed for all reception channels in step 104, the process proceeds from step 104 to step 111, and this routine 100 ends.

Thus, the memory of the microcomputer 51 shows the level table LVLT as shown in FIG. 10, that is, whether or not the broadcast wave can be received by all the channels, and when the reception is possible,
A table LVLT showing the reception level is prepared.

The level table LVLT shown in FIG.
Indicates that the second channel (and the fifth channel, etc.) is an empty channel, and the broadcast wave is not received by this second channel. In addition, this routine 100
It only has to be executed once when connecting to TR10.

Next, the routine 20 is executed by the microcomputer 51.
0 is executed to estimate how the VTR 10 and other video devices are connected to the receiver 20, and the estimated amount thereof is, for example, an estimation table CTBL shown in FIG.
Is converted into data.

That is, step 20 of routine 200.
At 1, the reception level of the current reception channel (which is any channel) of the tuner circuit 22 is compared with the reception level of the corresponding channel of the level table LVLT. In this case, when the VTR 10 is not in the reproduction mode, the switch circuit 15 of the VTR 10 is connected in a state opposite to that shown in the figure, so that the current reception level of the reception channel is the reception level of the corresponding channel of the level table LVLT. Is equal to

However, when the VTR 10 is in the reproduction mode, the switch circuit 15 of the VTR 10 is connected in the state shown in the figure, so that the current reception level of the reception channel is higher than the reception level of the corresponding channel of the level table LVLT. Is also weak. Further, even when the receiving channel is switched, the receiving level of the receiving channel after switching is different from the receiving level of the receiving channel before switching in the level table LVLT.

When the current reception level is different from the reception level of the level table LVLT, that is, VT
When the R10 is in the reproduction mode or when the receiving channel is switched, the process proceeds to step 202, and in this step 202, it is determined whether the VTR 10 is in the reproducing mode or the receiving channel is switched. Judging from

Then, when the receiving channel is switched, the process proceeds to step 203, and in this step 203, the receiving channel after switching is checked by observing the channel selection signal SCH.
Output channel, that is, an empty channel is checked.

If the received channel after switching is not an empty channel, the process proceeds to step 204.
Then, in step 204, the synchronization signal S54-
It is checked whether or not any of S56 is obtained, and if it is obtained, it is considered that the user has made a mistake in the operation method, and the process proceeds to step 205, and this step 205
In FIG. 11, for example, as shown in FIG.
~ S56 is provided, the estimated amount of "viewing a video signal or a normal broadcast channel being watched" is increased by "1", and then the routine 200 is ended at step 206.

If none of the synchronizing signals S54 to S56 is obtained in step 204, it is considered that the user has made a random operation, and the routine 200 is ended in step 206.

Further, in step 203, when the reception channel after switching is an empty channel, the process proceeds to step 211, and in this step 211, it is checked whether the reception level remains unchanged or becomes strong, If so, the process proceeds to step 212.

Then, in this step 212, it is checked whether or not the sync signal is obtained from the sync separation circuit corresponding to the video signal currently selected by the switch circuit 25 among the sync separation circuits 54 to 56. If not, the process proceeds to step 213, in which the estimated amount of “user watches on vacant channel” is increased by “2”, and then the routine 200 is ended by step 214.

In step 212, when the sync signal is obtained from the sync separation circuit corresponding to the currently selected video signal, the process proceeds to step 221, and in step 221, "the user is the VTR.
The estimated amount of “Watch 10 on a vacant channel” is increased by “3”, and then the routine 200 is ended at step 222.

Further, if the reception level remains unchanged in step 211, the process proceeds to step 231.
In step 231, it is checked whether or not the reception level of the empty channel is strong. If the reception level is strong, it is considered that the user has made a mistake in channel switching, and the process proceeds to step 232, in which step 232 is performed.
At, "Watch on a channel with a strong reception level"
Is increased by "2" and then step 2
The routine 200 is ended at 33.

If the reception level of the vacant channel is weak in step 231, it is regarded as a connection error between the VTR 10 and the receiver 20, and the process proceeds to step 233 to end the routine 200.

Further, in step 202, the VTR
When 10 is set to the reproduction mode, the process is step 2
In step 241, it is checked whether or not the sync signal is obtained from the sync separation circuit corresponding to the video signal currently selected by the switch circuit 25 among the sync separation circuits 54 to 56. Processing is performed, the process proceeds to step 242, in which the estimated amount of “the user inputs the video signal of VTR 10 from terminal 31 or 32 to watch” is increased by “3”, and thereafter. The routine 200 is ended in step 243.

If no sync signal is obtained in step 241, the process proceeds to step 251.
In this step 251, the sync separation circuits 54-56.
Among them, it is checked whether or not the sync signal is obtained from the sync separation circuit corresponding to the video signal not selected by the switch circuit 25, and when the sync signal is obtained, it is considered that the user has made a mistake in input switching. The process proceeds to step 252, and in this step 252,
The estimated amount of “viewing the video signal providing the synchronization signal among the video signals of the terminals 31 and 32” is increased by “1”, and then the routine 2 is performed in step 253.
Ends 00.

Further, when the sync signal is not obtained in step 251, it is regarded as a connection error between the VTR 10 and the receiver 20, the process proceeds to step 253, and the routine 200 is ended.

When the current reception level is equal to the reception level of the level table LVLT in step 201, the process proceeds to step 261, and in step 261, the switch circuit 25 detects the control signal SSW. , It is checked whether the terminal 31 or 32 has been switched.

Then, when it is switched, the process proceeds from step 261 to step 262, and in this step 262, as in step 201, the reception level of the current reception channel of the tuner circuit 22 becomes
The reception level of the corresponding channel in the level table LVLT is compared, and the current reception level is compared to the level table LVLT.
If the received level is different from the reception level of step 24,
The process proceeds to step 1, and thereafter, step 241 and subsequent steps are executed as described above.

However, in step 262, when the current reception level is equal to the reception level of the level table LVLT, the process proceeds to step 263, and in this step 263, among the sync separation circuits 54 to 56.
The switch circuit 25 checks whether or not a sync signal is obtained from the sync separation circuit corresponding to the video signal currently selected.

Then, when it is obtained, the user
It is considered that the channel selected by the recording / reproducing circuit 13 of the R10 is being viewed, and the process proceeds to step 264.
10 video signals are input from the terminal 31 or 32 and viewed "is increased by" 2 ", and then the routine 200 is ended at step 265.

Furthermore, when the synchronization signal is not obtained in step 263, the process ends the routine 200 in step 265.

When the switch circuit 25 is not switched to the terminal 31 or 32 in step 261, the routine 200 is ended in step 267.

In this way, the routine 200 is executed several times to prepare the estimated amount table CTBL, that is, the reproduction state estimated table CTBL as shown in FIG. 11, for example.

Further, the routine 30 is executed by the microcomputer 51.
0 is executed, the usage of the VTR 10 and the receiver 20 is estimated based on the estimation table CTBL, and automatic switching is performed when the VTR 10 is reproduced.

That is, step 30 of routine 300.
In 1, it is estimated whether the TV broadcast is being viewed or the video input is being played. When the TV broadcast is being viewed, the process proceeds to step 302, in which the reception level of the reception channel remains strong or weak. If it is checked and it remains strong, step 3
The routine 300 is ended by 03.

When the reception level becomes weak in step 302, the process proceeds to step 311, in which it is estimated whether the TV broadcast is being viewed or the video input is reproduced, and the TV broadcast is reproduced. When viewing, the process proceeds to step 312, where it is checked whether or not the reception level of the vacant channel has become strong or remains the same.

When it becomes stronger, the process proceeds to step 313. In this step 313, it is judged in the estimation table CTBL that the estimated amount of the reception channel in step 312 is large or small. In step 314, the reception channel of the tuner circuit 22 is set to step 3
The reception channel is switched to 12 and then the routine 300 is ended in step 315.

Further, in step 313, when the estimated amount is small, the process proceeds to step 321, and in step 321, it is checked whether or not a synchronization signal is obtained in the reception channel of step 312. Go to step 314. Also,
If not obtained, the estimation is still considered insufficient, and the process proceeds to step 322. In this step 322, the video signal of the message "The playback screen does not appear to be output from the VTR" is formed, and this message is displayed on the screen. After that, the routine 300 is ended in step 323.

If it is determined in step 312 that the reception level of the vacant channel remains the same, it is considered that the television broadcasting has ended, and the routine 300 is ended in step 324.

Further, in step 311, when the video input is reproduced, the process proceeds to step 331,
In this step 331, it is checked whether or not the sync signal corresponding to the estimated video signal is obtained, and when it is obtained, the process proceeds to step 332. Then, in this step 332, of the estimation table CTBL,
In step 331, it is determined whether the estimated amount of the video signal is large or small. If the estimated amount is large, the process proceeds to step 333, and in this step 333, the switch circuit 25
Are switched to the corresponding video inputs, after which step 334 ends routine 300.

If it is determined in step 332 that the estimated amount is small, the process proceeds to step 341. In step 341, it is checked whether the reception level of the vacant channel has become strong or remains the same.
When it becomes stronger, the process proceeds to step 333, and when it remains as it is, it is considered that the television broadcasting is finished, and the routine 300 is finished at step 334.

Further, in step 331, when the sync signal corresponding to the estimated video signal is not obtained, the process proceeds to step 351, and this step 351 is executed.
In the estimation table CTBL, it is determined whether the estimated amount of the video signal in step 331 is large or small. When the estimated amount is large, the process proceeds to step 352, and this step 35
At 2, the switch circuit 25 is switched to the corresponding video input, after which step 353 ends the routine 300.

If the estimated amount is small in step 351, the process proceeds to step 361. In step 361, it is checked whether the reception level of the empty channel is strong or weak. If it is strong, the process proceeds to step 362. In this step 362, it is checked whether or not the synchronization signal of the channel checked in step 361 is obtained, and when it is obtained, the process proceeds to step 363, and in this step 363, the reception channel of the tuner circuit 22 is changed to step 3
The reception channel is switched to 61 reception channels, and then the routine 300 is ended in step 364.

Further, when the sync signal is not obtained in step 362, it is considered that the VTR 10 is reproduced, and the process proceeds to step 371, and this step 3
At 71, the switch circuit 25 is switched, and then the routine 300 is ended at step 372.

When the reception level is weak in step 361, it is considered as a failure and the routine 300 is ended in step 353.

Further, when the video input is reproduced in step 301, the process proceeds to step 381,
In this step 381, it is checked whether the reception level of the reception channel remains strong or weak, and when it becomes weak, the process proceeds to step 382, and in this step 382, whether the video signal is input from the terminal 31 or 32 is available. It is estimated whether the input is from a channel.

Then, when it is estimated that the input is by the empty channel, the processing proceeds to step 383,
In this step 383, it is checked whether the reception level of the vacant channel is weak or strong, and if it is strong, the process proceeds to step 384, and in this step 384, it is checked whether or not the synchronization signal S54 is obtained.

Then, when the synchronizing signal is obtained, the processing proceeds to step 385. In this step 385, it is checked whether the synchronizing signal S55 or S56 is obtained. If not, the processing is step 38.
In step 386, the channel is switched to an empty channel, and then the routine 300 ends in step 396.

However, if the reception level of the reception channel remains strong in step 381, the routine 300 is terminated in step 387. If it is estimated in step 382 that the video signal is from the terminal 31 or 32, it is considered that the user switched the signal by himself, and the routine 300 is ended in step 387.

Furthermore, when the reception level of the empty channel is weak in step 383, it is regarded as a video device other than the VTR 10, and the routine 300 is ended in step 387. If the synchronization signal S54 is not obtained in step 384, the routine 300 is ended in step 387. Further, step 385
In, when the synchronizing signal S55 or S56 is obtained, the routine 300 is ended at step 387.

[0070]

According to the present invention, the normal state of the television receiver 20 and the state of the VTR 10 during reproduction are learned,
If it is guessed that the VTR 10 has been put into the playback mode, V
Since the input is switched to TR10, VT
The operation for reproducing the R10 is easy, and the operation is easy for those who are not good at this kind of equipment.

Further, the VTR 10 may be manufactured by another company, or the television receiver 20 can be automatically switched regardless of whether the VTR 10 is old or new. In addition, the operation can be automatically switched by operating the remote controller of the VTR 10 or operating the keys of the main body of the VTR 10.

Further, since the microcomputer 51 makes inference independently, it is not necessary to provide a special control signal line between the VTR 10 and the television receiver 20.

[Brief description of drawings]

FIG. 1 is a system diagram showing an example of the present invention.

FIG. 2 is a system diagram showing an example of a VTR.

FIG. 3 is a flowchart showing an example of a learning routine.

FIG. 4 is a flowchart showing a part of an example of a learning routine.

FIG. 5 is a flowchart showing a continuation of FIG.

FIG. 6 is a flowchart showing a continuation of FIGS. 3 and 4;

FIG. 7 is a flowchart showing a part of an example of a processing routine.

FIG. 8 is a flowchart showing a continuation of FIG.

9 is a flowchart showing a continuation of FIG.

FIG. 10 is a diagram showing an example of an execution result of a learning routine.

FIG. 11 is a diagram showing an example of an execution result of a learning routine.

[Explanation of symbols]

 10 VTR 12 distribution circuit 13 recording / reproducing circuit 16 RF modulator circuit 20 TV receiver 21 antenna terminal 22 tuner circuit 23 video intermediate frequency circuit 25 switch circuit 27 picture tube 31, 32 video input terminal 41 microcomputer 51 neuro AI microcomputer 52, 53 A / D converter 54-56 Sync separation circuit

Claims (2)

[Claims] 1. A circuit for outputting a signal indicating the level of a broadcast wave signal, a circuit for extracting a synchronization signal from the broadcast wave signal and an input video signal, a signal indicating the level of the broadcast wave signal, and the synchronization VTR from the signal and the tuning signal that selects the receiving channel
Of the VTR and a state of not using the VTR, and based on a result of the learning, a circuit for estimating the VTR in the reproduction mode is provided. When I guessed that was set to playback mode,
A television receiver adapted to select a playback video signal of the VTR and play it back as a screen. 2. A circuit for outputting a signal indicating the level of a broadcast wave signal, a circuit for extracting a synchronization signal from the video signal of the broadcast wave signal and the input video signal, and the video signal of the broadcast wave signal and the input The VTR from the switch circuit for selecting and extracting the selected video signal, the signal indicating the level of the broadcast wave signal, the synchronization signal, and the tuning signal for selecting the receiving channel.
Of the VTR and a state of not using the VTR, and based on a result of the learning, a circuit for estimating the VTR in the reproduction mode is provided. When I guessed that was set to playback mode,
A television receiver adapted to control the switch circuit to select the reproduced video signal of the VTR and reproduce it as a screen.