JPH09102971A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To deal with partial destruction generated in a non-volatile memory as well concerning a television receiver with which control data are stored in the non-volatile memory. SOLUTION: The control data are stored in non-volatile memories 6 and 7. The standard values of control data are stored in ROM 8 and 9. When a command for setting at the standard values is applied by a commander 33 or an input key 31, the control values in the nonvolatile memories 6 and 7 are switched to the standard values of control data in the ROM 8 and 9. Therefore, even when the nonvolatile memory is destroyed, the television receiver can be operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to adjustment data for adjusting image distortion and convergence, a screen mode,
The present invention relates to a television receiver in which user data such as channels, input switching, and volume is stored in a nonvolatile memory.

[0002]

2. Description of the Related Art Recent television receivers are provided with a non-volatile memory for storing adjustment data such as image distortion and convergence, and various adjustments can be performed using a microcomputer. That is, for example, image distortion, convergence, etc. are adjusted at the time of factory shipment, and this adjustment data is stored in the nonvolatile memory. When the television receiver is operated, various adjustment data stored in the non-volatile memory is read out under the control of the microcomputer. Based on this adjustment data, various adjustments such as image distortion and convergence are performed.

There is also provided a non-volatile memory for storing adjustment data and setting data such as screen mode, channels, input switching, and volume designated by the user. These pieces of information are similarly read out under the control of the microcomputer.

As described above, in a television receiver in which various controls are performed by the microcomputer, various adjustment data are stored in the nonvolatile memory. Therefore, if the nonvolatile memory is destroyed, normal operation cannot be performed. .

Therefore, conventionally, standard adjustment data for reliable operation is stored in the ROM in the microcomputer, and when the nonvolatile memory is destroyed,
The standard adjustment value of ROM is used. Detection of whether or not the non-volatile memory is destroyed is performed by writing specific check data to a predetermined address of the non-volatile memory and reading the specific check data from the predetermined address. There is.

That is, as shown in the flow chart of FIG. 3, data at a predetermined address in which specific data for checking is written is read (step S1).
1). It is determined whether the data read from the address matches the specific data written in advance (step S12). If they match, it is determined that the nonvolatile memory has not been destroyed, and the data from the nonvolatile memory is used (step S13). If they do not match, it is determined that the nonvolatile memory is destroyed, and the standard data from the ROM is used (step S14).

[0007]

As the destruction of the non-volatile memory, not only the entire memory is destroyed but also the memory is partially destroyed. For example, the address in which the specific data for checking is written is normal, but the non-volatile memory may be destroyed elsewhere.

As described above, conventionally, it is detected whether or not the specific data can be read from the predetermined address where the specific data for checking is stored, and whether or not the nonvolatile memory is destroyed is detected. Deciding. In this case, the address where the specific data for checking is written is normal, but if the non-volatile memory is destroyed elsewhere, it is assumed that the non-volatile memory is not destroyed. Data is used. Therefore, it will be operated with incorrect data,
In the worst case, it will not work at all. As described above, conventionally, it is impossible to deal with the case where the nonvolatile memory in which the adjustment data is stored is partially destroyed.

Therefore, an object of the present invention is to be able to deal with a television receiver in which adjustment data is stored in a non-volatile memory even when the non-volatile memory is partially destroyed. To provide a television receiver that does.

[0010]

According to the present invention, when a nonvolatile memory for storing adjustment data, a ROM for storing a standard value of the adjustment data, and a command for setting the standard value are given, the nonvolatile memory is provided. The television receiver is provided with a control means for controlling the adjustment value of the memory to be switched to the standard value of the adjustment data of the ROM.

When a command to set the standard value is given by the commander or the input key, the adjustment value of the non-volatile memory is switched to the standard value of the adjustment data of the ROM. Therefore, even if the nonvolatile memory is destroyed, the operation can be performed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a television receiver to which the present invention can be applied. FIG.
In, the antenna 11 receives television broadcasts in the UHF and VHF bands. The received signal from the antenna 11 is supplied to the UHF / VHF tuner 12.
The UHF / VHF tuner 12 selects a desired channel in the UHF and VHF bands and demodulates a video signal and an audio signal. The tuning operation of the UHF / VHF tuner 12 is performed by the tuning microcomputer 3. UHF /
The video output from the VHF tuner 12 is supplied to the video input switch 13, and the audio output thereof is supplied to the audio input switch 14.

The satellite dish (B
S broadcast) is received. This received signal is supplied to the BS tuner 16 via a converter (not shown). The BS tuner 16 selects a desired satellite broadcast channel. The channel selection operation in the BS tuner 16 is performed by the channel selection microcomputer 3. When the satellite broadcast is a normal television broadcast, the BS tuner 16 demodulates the video signal and the audio signal. Then, the video output is supplied to the video input switch 13, and the audio output is supplied to the audio input switch 14. Satellite broadcasting is M
BS tuner 1 for USE HDTV signals
The output of 6 is supplied to the MUSE decoder 17.

The MUSE decoder 17 decodes the HDTV signal band-compressed by the MUSE method. For decoding MUSE HDTV signals, MU
The SE microcomputer 4 is used. Further, an external MUSE signal can be input to the MUSE decoder 17.

The video input switch 13 is a VHF / UH
The video signal demodulated by the F tuner 12 and the video signal demodulated by the BS tuner 16 and the video signal from the external video input terminal are selected. Also, the audio input switch 14 is used for the VHF / UHF tuner 1
The audio signal demodulated in 2 and the audio signal demodulated in the BS tuner 16 and the audio signal from the external audio input terminal are selected. The video input switch 13 and the audio input switch 14 are
It is switched by the output of the system microcomputer 1.

The output of the video input switch 13 is supplied to the three-dimensional comb filter 20. The luminance signal Y and the chroma signal C are separated by the three-dimensional comb filter 20. Further, the output of the video input switch 13 is supplied to the ID detection circuit 21. The ID detection circuit 21 detects the ID signal inserted in the vertical blanking period to identify whether the received signal is a wide screen. I
The detection output of the D detection circuit 21 is supplied to the system microcomputer 1.

The output of the three-dimensional comb filter 20 is the EDT.
It is supplied to the V processing circuit 22. EDTV processing circuit 22
Is for decoding the identification signal and the reinforcement signal when the received signal is of the EDTV-2 system.

The output of the EDTV processing circuit 22 is supplied to the RGB video signal processing circuit 23. Also, the RGB video signal processing circuit 23 is supplied with the HDTV signal decoded by the MUSE decoder 17, and at the same time the external HDT
The HDTV signal from the V signal input terminal and the RGB signal from the external RGB input terminal are supplied. The RGB video signal processing circuit 23 forms the three primary color signals R, G, and B, and the RGB video signal processing circuit 23 adjusts brightness, contrast, and the like.

The three primary color signals R, G, B from the RGB video signal processing circuit 23 are supplied to the CRT display 25. A display signal is supplied from the screen display circuit 27 to the RGB video signal processing circuit 23. With this display signal, necessary information is displayed on the screen.

Further, the RGB video signal processing circuit 23 separates the horizontal and vertical synchronizing signals, and the horizontal and vertical synchronizing signals are supplied to the deflection circuit 24. A deflection current is passed through the deflection coil of the CRT display 24 by the deflection circuit 24. A convergence correction signal is formed by the convergence circuit 26, and this convergence correction signal is sent to the convergence coil of the CRT display 24.

The audio signal from the audio input switch 14 is supplied to the audio signal processing circuit 28. With the audio signal processing circuit 28,
The left and right balance is adjusted. The output of the audio signal processing circuit 28 is supplied to the speakers 29A and 29B.

In this television receiver, various controls are carried out by a microcomputer (hereinafter abbreviated as microcomputer).
It is done by.

That is, the television receiver to which the present invention is applied is provided with a system microcomputer 1, a monitor microcomputer 2, a channel selection microcomputer 3, and a MUSE microcomputer 4. These microcomputers 1 to 4 are connected to the bus 5.

The system microcomputer 1 controls the operation of the entire set. The system microcomputer 1 has an input key 3
Input is given from 1. Further, a command from the remote controller 33 is received by the light receiving section 32, and this command is given to the system microcomputer 1.

The monitor microcomputer 2 controls the screen display. That is, the monitor microcomputer 2 controls the screen mode such as wide zoom and subtitles. In addition, the monitor microcomputer 2 includes an RGB video signal processing circuit 2
3 to control white balance, brightness, contrast, etc., and also control the deflection circuit 24 and the convergence circuit 26 to adjust image distortion and convergence. Further, the monitor microcomputer 2 has a screen display circuit 27.
Generates the required display signal.

The tuning microcomputer 3 controls the PLLs of the UHF / VHF tuner 12 and the satellite broadcast tuner 16,
Perform tuning operation.

The MUSE microcomputer 4 controls the MUSE decoder 17 so that the HD band-compressed by the MUSE method is used.
Performs demodulation processing of TV signals.

In this television receiver, a non-volatile memory 6 in which adjustment data such as image distortion and convergence is stored, and a screen mode such as wide zoom and subtitles, channel, input switching, volume adjustment, etc. A non-volatile memory 7 for storing data is provided. Also,
The ROM 8 in the monitor microcomputer 2 stores standard adjustment data such as image distortion and convergence, and the ROM 9 in the system microcomputer 1 stores standard values such as screen mode, channels, input switching, and volume. Has been done. When the non-volatile memory 6 and the non-volatile memory 7 are destroyed, standard data of the ROM 8 and the ROM 9 are used, and the minimum operation is possible.

In one embodiment of the present invention, as shown in FIG. 2, when the "standard data ON" command is received and the "standard data ON" command is input, the ROM 8 and RO
It is controlled so that the standard data of M9 is used. Therefore, it is possible to deal with a case where the nonvolatile memory is partially destroyed.

That is, the system microcomputer 1 determines whether or not the "standard data ON" command is input from the input key 31 or the remote controller 33 (step S1). When the "standard data ON" command is input, the system microcomputer 1 transfers a "standard data ON" signal to the monitor microcomputer 2 (step S
2). The system microcomputer 1 uses standard data stored in the ROM 9 in the system microcomputer 1 as adjustment data instead of the contents of the nonvolatile memory 7, and the monitor microcomputer 2 stores in the nonvolatile memory 6. The standard data stored in the non-volatile memory 8 in the monitor microcomputer 2 is used as the adjustment data instead of the adjustment data (step S3).

As described above, the standard data of the ROM 8 and the ROM 9 are used as the data of the non-volatile memory 6 and the non-volatile memory 7 by the "standard data ON" command. Therefore, it is possible to deal with a case where the nonvolatile memory is partially destroyed.

In the above example, "standard data ON"
Non-volatile memory 6 and non-volatile memory 7 by command
The standard data of the ROM 8 and the ROM 9 are replaced with the standard data of the above. However, the specific data for checking is stored in a predetermined address of the nonvolatile memory, and whether or not the specific data can be read out is detected. If the specific memory cannot be read, it is possible to combine the controls using the standard data of the ROM 8 and the ROM 9 if the specific memory cannot be read.

[0033]

According to the present invention, when a command to set the standard value is given by the commander or the input key, the adjustment value of the non-volatile memory is switched to the standard value of the adjustment data of the ROM. Therefore, even if the non-volatile memory is partially destroyed, the adjustment value of the non-volatile memory is stored in the ROM.
It becomes possible to perform the minimum operation by switching to the standard value of the adjustment data of.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a television receiver to which the present invention can be applied.

FIG. 2 is a flowchart used to describe an example of a television receiver to which the present invention can be applied.

FIG. 3 is a flowchart used for explaining switching control of a non-volatile memory in a conventional television receiver.

[Explanation of symbols]

 1 System Microcomputer 2 Monitor Microcomputer 6, 7 Non-volatile Memory 24 Deflection Circuit 26 Convergence Circuit

Claims (1)

[Claims] 1. A non-volatile memory for storing adjustment data, a ROM for storing the standard value of the adjustment data, and a ROM for storing the adjustment value of the non-volatile memory when a command for setting the standard value is given. And a control means for controlling so as to switch to the standard value of the adjustment data.