JP2517706B2 - Electronics - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an audio / video device in which each circuit unit is initialized by initial setting data from a memory in which initial setting data for each set is written.

[Outline of Invention]

The present invention relates to an electronic device in which initial setting data from a memory in which initial setting data for each set is written is used to initialize each part of the circuit, and when there is an error in the initial setting data for each set during initialization. , The initial setting data from the memory in which the average initial setting data of each part of the circuit is written is used to initialize each part of the circuit to prevent the failure of the set due to the initial setting of the abnormal initial setting data. is there.

[Conventional technology]

A television receiver for digitally processing most of the signal processing is constructed, for example, as shown in FIG.

In the figure, (1) is a tuner circuit including a tuner to a video detection circuit, and the composite video signal S _V is obtained from the tuner circuit (1). This video signal
_SV is converted into a digital signal by the A / D converter (2),
It is supplied to the peaking filter (4) via the comb filter (3) to obtain a digital luminance signal Y _D. The luminance signal Y _D is supplied to the signal processing circuit (5Y), supplied is converted into an analog luminance signal Y to a matrix circuit (7) by the D / A converter after the processing such as contrast (6Y) Is done.

Further, the output of the comb filter (3) is supplied to the bandpass filter (8) to obtain a digital carrier color signal C _D. This carrier color signal C _D is supplied to the signal processing circuit (5C), and after being adjusted for ACC, hue, color saturation, etc., is supplied to the color demodulation circuit (9), and the digital red difference signal R _D − Y _D ,
Blue color difference signal B _D -Y _D is obtained. And these color difference signals
_{R D -Y D, B D -Y} D are each D / converter (6R), is fed to the conversion (6B) analog color difference signals R-Y, the B-Y by a matrix circuit (7).

Red, green, and blue primary color signals from the matrix circuit (7)
R, G, B are obtained, and adders (10R), (10G), and (10B) respectively
Amplifier for white balance and brightness adjustment via (11
R), (11G), and (11B), and the outputs of these amplifiers (11R), (11G), and (11B) are colored through drive amplifiers (12R), (12G), and (12B), respectively. It is supplied to the picture tube (13).

Further, the composite video signal S _V from the tuner circuit (1) is supplied to a sync separation circuit (14) to obtain a sync pulse, and this sync pulse is supplied to a pulse processing circuit (15H) to have a predetermined pulse width and A phase horizontal synchronizing pulse P _H is supplied to the horizontal output circuit (16H). Then, a horizontal deflection signal is supplied from the horizontal output circuit (16H) to the horizontal deflection coil (17H). The synchronization pulse obtained from the synchronization separation circuit (14) is supplied to an integration circuit (18) to obtain a vertical synchronization pulse. This pulse is supplied to a pulse processing circuit (15V) and supplied to a pulse processing circuit (15V) having a predetermined pulse width and phase. is a synchronization pulse P _V, is supplied to the vertical output circuit (16V). Then, a vertical deflection signal is supplied from the vertical output circuit (16 V) to the vertical deflection coil (17 V).

Further, (19) is a tuning microcomputer (microcomputer), and (20) is a controlling microcomputer. A rewritable nonvolatile memory (21) is connected to the microcomputer (19), and a rewritable nonvolatile memory (23) is connected to the microcomputer (20) via a bus (22).
The key panel (24) is connected to 9). This key panel (24) allows the user to select a channel or contrast,
A plurality of keys for adjusting brightness, hue, color saturation, etc. are provided. Also, the memory (21) and the panel (24)
This is for storing channel selection data preset corresponding to the ten-key pad and user-adjusted data such as contrast, brightness, hue and color saturation even when the power is turned off. However, the data such as the contrast, the brightness, the hue and the color saturation are offset values with respect to the standard value (center value), and the standard value is stored in the memory (23). The memory (23) stores data that does not require adjustment by the user but needs adjustment by the manufacturer, such as data of white balance, horizontal deflection, and vertical deflection. The data stored in the memory (23) is adjusted, for example, at the time of shipment by a commander (26) for adjustment connected to the microcomputer (20) via a terminal (25).

Further, in FIG. 3, (30) is a display circuit, which is a circuit for displaying a channel for channel selection on the screen of the color picture tube (13) and for displaying volume when adjusting the volume. Is. This display circuit (30) has a microcomputer (1
Display data, that is, channel data, volume data, and the like are supplied from 9) via the microcomputer (20). Then, from the display circuit (30), red, green, and blue three primary color signals R _I , G _I , and B _I corresponding to the display contents are obtained, and the adders (10R) and
It is supplied to (10G) and (10B), and the channel, the volume, etc. are displayed on the screen of the color picture tube (13) so as to be superimposed on the image.

In the above configuration, the microcomputer (1
9) The tuning data of the channel that was selected before the power was turned off is read from the memory (21), this data is supplied to the tuner circuit (1), and the channel is selected before the power is turned off. The channel that had been used is selected. In addition, the microcomputer (19) reads out the brightness offset value data from the memory (21) and supplies it to the microcomputer (20) through the interface (29), and at the same time, the microcomputer (20) reads the memory (23). The brightness and white balance data are read from the amplifier, and these data are supplied to the amplifier control circuit (11) via the bus (22) and the interface (27), and the control circuit (11) causes the amplifier (11R). ~ (11
B) is controlled, and the three primary color signals RB are adjusted so that the brightness and the white balance are as set.

In addition, the deflection data is read from the memory (23) by the microcomputer (20) and is supplied to the pulse processing circuits (15H) and (15V) via the bus (22) and the interface (28) for horizontal and vertical. Is adjusted so that the deflection waveform of is as set.

Further, the microcomputer (19) reads out offset value data such as contrast, hue and color saturation from the memory (21) and supplies the offset value data to the microcomputer (20) through the interface (29). The standard value data such as contrast, hue and color saturation is read from the memory (23) by the memory (23), the offset value data and the standard value data are added, and the added data is transferred to the interface. It is supplied to the signal processing circuits (5Y) and (5C) via the ace (27), and the signals Y _D and C _D are adjusted so that the contrast, the hue, the color saturation and the like are as set. Therefore, on the color picture tube (13), the channel selected when the power is turned off is displayed in the same state.

The data set in the interfaces (27) and (28) will be stored in the registers (not shown) provided in the interfaces (27) and (28) until new data is supplied next time. It is latched.

Next, when the user operates, for example, a numeric keypad on the key panel (24), the microcomputer (19) reads out the channel tuning data preset corresponding to the operated key from the memory (21). This data is supplied to the tuner circuit (1) and the channel selected by the numeric keypad of the key panel (24) is selected.
The channel selection data of the channel selected at this time is written in the memory (21) and is prepared when the power is turned off.

When, for example, a hue key on the key panel (24) is operated, the hue offset value data in the memory (21) is updated each time the key is operated, and the data is transferred via the interface (29). Microcomputer (2
0), is added to the standard value data from the memory (23), and the added data is supplied to the signal processing circuit (5C) via the interface (27) to adjust the hue. .

In FIG. 3, the portion surrounded by the alternate long and short dash line is formed by, for example, one IC.

In the television receiver shown in FIG. 3, when the power is turned on, the data stored in the memory (23) is read out, whereby each part of the circuit, that is, the signal processing circuit (5
Y), (5C), pulse processing circuits (15H), (15V), etc. are initialized. This becomes a problem when the power is turned on in the adjustment mode for writing the initial setting data, that is, the standard value data in the commander (26) at the time of shipping, for example.
That is, when the power is turned on in the adjustment mode, nothing is stored in the memory (23) or random data is stored, so that each circuit part is set to an abnormal value,
It may adversely affect each part of the circuit. For example, the output circuit (16H), (16V) may increase due to the increase of horizontal and vertical amplitude or the decrease of horizontal and vertical oscillation frequency.
May be destroyed.

Therefore, the present applicant previously proposed the following configuration in order to solve the problem at power-on in this adjustment mode.

That is, as shown by the broken line in FIG. 3, the microcomputer (20)
An area (31) in which average initial setting data corresponding to the data written in the memory (23) is previously written is provided in a part of the ROM (20A). The data in this area (31) is not rewritable and is common to each set. And it is made to operate along the flow chart shown in FIG.

When the power is turned on, it is determined whether the mode is the adjustment mode. For example, connect the commander (2
When 6) is connected, it is judged to be the adjustment mode,
In other cases, it is determined that the user mode is used by the user.

When it is determined that the adjustment mode is set, the adjustment mode flag is turned on, and the average initial setting data of each part of the circuit written in advance is read from the area (31) of the ROM (20A),
Based on this, each part of the circuit is set. Then, after the setting of each part of the circuit, the display data for displaying the "service" indicating the adjustment mode is supplied from the microcomputer (20) to the display circuit (30) and displayed on the screen of the color picture tube (13). Is displayed with the text "service" overlaid on the image.

Next, when there is a remote control signal from the commander (26), adjustment is performed for each set, and the adjusted initial setting data of each circuit portion is written in the memory (23). In this case, display data indicating items, states, and control amounts in this adjustment are supplied from the microcomputer (23) to the display circuit (30),
These are displayed on the screen of the picture tube (13).

Then, the adjustment end key on the commander (26), for example, "EX
The adjustment mode flag is turned off by pressing "IT",
Adjustment mode is released.

On the other hand, in the user mode, the initial setting data written in the adjustment mode is read from the memory (23),
Based on this, each part of the circuit is set.

With the above configuration, when the power is turned on in the adjustment mode, each circuit unit is set based on the average initial setting data of each circuit unit pre-written in the area (31) of the ROM (20A). Even if the initial setting data is not written in the memory (23), each circuit portion is not set to an abnormal value, and there is no fear of damaging each circuit portion.

[Problems to be solved by the invention]

As described above, the problem at power-on in the adjustment mode can be solved, but in the case of the example of FIG. 3, the same problem may occur at power-on in the user mode. That is, when the power is turned on in the user mode, the data stored in the memory (23) is read out, and the respective circuit parts are initialized based on the data. If the data is random, or if you forget to write the data to the memory (23) in the adjustment mode, each part of the circuit may be set to an abnormal value, causing a set failure. is there.

The present invention prevents such a set failure from occurring.

[Means for solving problems]

The electronic device of the present invention is, for example, as shown in FIG. 1 and FIG.
It has a first memory (23) in which initial setting data for each set is written, and a second memory (31) in which average initial setting data of each part of the circuit is written. Compare the initial setting data written in the memory (23) with the average initial setting data written in the second memory (31), and judge that there is a large difference If it is not judged to be abnormal, the initial setting data from the first memory (23) is used to initialize each part of the circuit, and if it is judged to be abnormal, the circuit is initialized to the initial setting data from the second memory (31). The initial setting of each part is performed.

[Action]

Even if the initial setting data written in the first memory (23) for each set is abnormal, each part of the circuit is initialized to an average value.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, parts corresponding to those in FIG. 3 are designated by the same reference numerals.

Also in this example, the area (31) in which the average initial setting data corresponding to the data written in the memory (23) is written in advance in a part of the ROM (20A) of the microcomputer (20).
Is provided. The data in this area (31) is not rewritable and is common to each set.

Then, in this example, the operation is performed along the flow chart shown in FIG.

When the power is turned on, it is determined whether the mode is the adjustment mode. For example, connect the commander (2
When 6) is connected, the adjustment mode is determined, and the same operation as described in FIG. 4 is performed.

On the other hand, if the user mode is determined, the memory (23)
It is determined whether or not the initial setting data written in is abnormal. For this judgment, for example, the microcomputer (20) uses the initial setting data written in the memory (23).
It is performed by comparing with the average initial setting data written in the area (31) of the ROM (20A). In this case, without comparing all the initial setting data,
For example, only the portion (deflection system or the like) that causes a set failure may be compared. When the initial setting data of the memory (23) is significantly different from the average initial setting data of the area (31), it is determined to be abnormal. The memory (23)
If the initial setting data is written separately in the average value and the offset value, the average value is compared with the average initial setting data of the area (31) to determine whether they match. To be judged.

When the initial setting data of the memory (23) is determined to be abnormal, the same operation as that in the adjustment mode is performed. At this time, each part of the circuit is initialized based on the average initialization data previously written in the area (31). At this time, the word "service" is displayed on the screen, which causes an error message that the initial setting data in the memory (23) is not normal. Therefore, when this "service" character is displayed, an area for initial setting data in the memory (23) is required.

On the other hand, when the initial setting data of the memory (23) is determined to be normal, the initial setting data written in the memory (23) is read, and each circuit unit is set based on the read initial setting data.

 Others are the same as in the example of FIG.

This example is configured as described above, and when an error is detected in the initial setting data written in the memory (23) when the user mode is turned on, the area (3
Since each part of the circuit is set based on the average initial setting data written in 1), it is possible to prevent the failure of the set without setting each part of the circuit to an abnormal value.

In the above embodiment, the average initial setting data is written in the area (31) of the ROM (20A) of the microcomputer (20), but a similar memory should be provided outside the microcomputer (20). You may

Further, the above-mentioned embodiment is an example in which the present invention is applied to a television receiver, but in audio equipment, video equipment, etc., the circuit is initialized with initialization data from a memory in which initialization data for each set is written. Sound for which initial settings for each part are made
It can be similarly applied to video equipment.

〔The invention's effect〕

According to the present invention described above, even if there is an abnormality in the initial setting data for each set, each circuit portion is initialized to an average value, so that a failure of the set due to an abnormal value is prevented. can do.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a main part showing an embodiment of the present invention, FIG. 2 is a flow chart for explaining the operation thereof, FIG. 3 is a configuration diagram showing an example of a television receiver, and FIG. Is a flow chart for explaining its operation. (20) is a control microcomputer, (20A) is its ROM, (23)
Is a rewritable non-volatile memory, (30) is a display circuit, (3
1) is an area for initial setting data.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hisafumi Yamada 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Masayuki Motomiya 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo No. Sony Corporation (56) Reference JP 58-66102 (JP, A) JP 59-203589 (JP, A) JP 57-64397 (JP, A) JP 55-142498 (JP, A)

Claims (1)

(57) [Claims] 1. A rewritable memory in which initial setting data for each set is written, and a non-rewritable memory in which average initial setting data of each circuit portion is written, and the above rewriting is possible at the time of initial setting. The initial setting data written in a non-rewritable memory and the average initial setting data written in the non-rewritable memory, and determine that there is a large difference between If not, the initial setting data from the rewritable memory is used to initialize each part of the circuit, and if it is determined to be abnormal, the initial setting data from the unrewritable memory is used to initialize each part of the circuit. Audio and video equipment to be.