JP3229685B2 - Storage device and television receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device having a last memory holding function. In particular, the present invention relates to a television receiver with a last memory.

[0002]

2. Description of the Related Art As a conventional example, for example, Japanese Patent Publication No. 4-531
As shown in Japanese Patent Publication No. 46 (H04N 5/00), a configuration for holding various control target values using a nonvolatile memory is disclosed. When the power is turned on, various control target values when the power is turned off are read out, and are reproduced in a state where the power is turned off.

FIG. 5 shows a block diagram of this television receiver. A microcomputer 2 for controlling the receiving circuit is connected to the receiving circuit 1. The receiving circuit 1 converts the signal received by the tuner 3 by the tuning circuit 4 into an intermediate frequency amplifying circuit 5, a video output circuit 6, an audio output circuit 7, and a CRT.
8. The video and audio are reproduced by the speaker 9. The video output circuit 6 and the audio output circuit 7 are analog-controlled by the microcomputer 2.

The microcomputer 2 has a CPU 10, an execution program, and a ROM as storage means for storing basic items.
11, RAM 12 for work area, nonvolatile memory 13 for performing last memory, etc., various interfaces 14,
18, 20, and 21.

A remote controller (hereinafter referred to as a remote controller) 1
The CPU 10 receives the signal from the CPU 5 through the interface 14 by the photodiode 16 and the light receiving circuit 17.
Take in. The operation by the viewer can also be performed via the key switch circuit 19.

With this configuration, when the power of the television receiver is turned on, the last memory data is read from the nonvolatile memory 13. The data indicates a control value of each control target and a channel selection when the power is turned off before the power is turned on.

Then, the control value is changed by the remote controller 15 and the key switch circuit 19, and the control value in the nonvolatile memory 13 is rewritten with the control value of the control object changed accordingly. Then, even when the power is shut off, the control value before the power is shut off is held in the nonvolatile memory 13.

Thus, when the power is turned on again, abnormal images and sounds do not occur.

[0009]

However, in this method, since the data is rewritten only the number of times of the control, the use of the non-volatile memory is frequently performed, the deterioration of the non-volatile memory is accelerated, and the number of times of writing of the memory is reached. This may cause the nonvolatile memory to malfunction or malfunction.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a pair of control value data in which one or a plurality of control value data which can be arbitrarily changed by a control operation and identification data designating the control data to be used are combined with the control value data. In a storage area for storing each control value data, a storage unit including the storage area in a pair, and a storage device including a unit for selecting the storage unit, the control data is read by identifying data of each storage unit. If the values are the same, the control value data is read from one storage means if they are the same, and the reading means reads the control value data from the other storage means if they are different. If the identification data of the means are compared and they are the same, the identification data of the other storage means is inverted and stored in the storage means,
If it is different, the storage device is composed of writing means for inverting the identification data of one storage means and storing the inverted data in the storage means.

[0011] Further, control operation means operated by the control operation, one or more control value data which can be arbitrarily changed by the control operation, and identification data designating the control data to be used are control value data. A storage area for storing each control value data in a pair in combination with a storage means, a storage means having the storage area in a pair, and a control means for reading and writing data in the storage means in accordance with an operation of the control operation means And a controlled unit controlled by data read and written by the control unit, wherein the storage area is read by the identification data of the storage unit and a storage area corresponding to the write control data is selected. It is a receiver.

[0012]

According to the present invention, the number of times of writing to one address is reduced by writing control data to a plurality of addresses of the nonvolatile memory.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the last memory portion of the nonvolatile memory shown in FIG.

The present invention will be described with reference to the drawings. The non-volatile memory is divided into two memory areas, an A memory and a B memory. The A memory and the B memory hold the last memory value on one side and the value stored before the last memory on the other side.

Here, in the case where the power of the nonvolatile memory is turned off and then turned on again, the data is read from the memory and the controlled means is controlled in accordance with the read data. No. 4-53146.

However, according to the present invention, the memory is divided into two areas (A memory and B memory), and which one of them is used is compared with the identification (ID) bit at the first bit in each memory. Do it by doing.

FIG. 1 is a flowchart showing reading of the last volume memory. FIG. 2 is a flowchart showing writing of the sound volume to the memory. FIG. 3 is a diagram showing the state of the memory of the first embodiment, and FIG. 4 is a diagram showing the state of the memory of the second embodiment.

As shown in FIG. 1, at the time of reading, data is first read from the A and B memories, respectively. And
The ID bits of the A memory and the B memory are compared, and if they are equal, the data of the A memory is used as the control value, and if they are different, the controlled means is controlled using the data of the B memory as the control value.

As shown in FIG. 2, when the volume changes during writing, data is read from the A and B memories, and the ID bits of the A and B memories are compared. And the control value is written to the A memory by inverting the ID bit of the A memory if the control value is different. Here, when the volume does not change, the process waits until there is a change in the volume. However,
When the power is turned off, it is reset and starts from the start at the next on.

A specific description will be given using values.

For the sake of explanation, the last memory value is first stored in the B memory,
It is assumed that the value stored in the memory A before the last memory is held.

First, in the state 1 of FIG. 3, since (ID bit of the memory A) ≠ (ID bit of the memory B), the data '001111' of the memory B is stored as shown in the flowchart of FIG. Is read. Then, a sound is output at 15 sound volumes (the maximum is, for example, 63 sound volumes) corresponding to the data '001111'.

After that, when the volume is raised by the operation of the viewer, for example, when the volume becomes 19, the data becomes '0100'.
11 'is written to the non-volatile memory. Since the data to be written is (ID bit of memory A) ≠ (ID bit of memory B), as shown in the flowchart of FIG. 2, the ID bit is inverted and written to memory A (state 2 in FIG. 3). ).

Next, when the power is turned off and turned on again in this state, the respective ID bits are compared by the last memory operation in the same manner as before, and (ID bit of A memory) =
(ID bit of memory B), the memory is read from memory A, and data '010011' is read.

When the volume is adjusted by the viewer, for example, when the volume is adjusted to 4, the IDs of the A and B memories
The bits are compared, and since (ID bit of memory A) = (ID bit of memory B), '0001
Write 00 'data.

Thereafter, every time the power is turned on, data is read from the memory, and the operation stored in the memory every time the viewer operates is repeated.

Next, as a second embodiment, consider a case where an operation is performed a plurality of times after reading is performed. FIG. 4 is a diagram showing a memory state when the viewer performs an operation a plurality of times after turning on the power. In FIG. 4, when reading is performed in the nonvolatile memory holding state of the state 4 (A
Since the ID bit of the memory) ＩＤ (the ID bit of the B memory), 15 bits corresponding to “001111” are obtained from the B memory.
The volume is read.

When the volume is adjusted for the convenience of the viewer, the volume is written to the memory. Since the adjustment value becomes, for example, 19 sound volumes (ID bit of memory A) ≠ (ID bit of memory B), FIG.
The ID bit of the A memory is inverted, and
Write the volume data '010011'.

Further, when the volume is adjusted to 4 volumes by volume adjustment (ID bit of memory A) = (ID bit of memory B), the ID bit of memory B is inverted from FIG. To 4 volume data '000100'
Write.

As described above, writing is sequentially performed on the memory,
The last memory operation can be performed when the power is turned on again after the power is turned off, and the number of times of writing to the memory can be reduced to approximately half since the data is alternately written to the A memory and the B memory. Further, since the memory to be written to is determined by the ID bit used for the data in the memory, a separate memory designating memory is not required, and the number of times of writing can be reduced as described above.

Although the above has been described in detail by taking the example of the volume, it goes without saying that various control values of channel, image and sound quality can be similarly performed. For example, for a channel, it can be performed separately for the A memory and the B memory, with the first bit of the 6-bit data as the ID bit. In this case, there are memories for 31 channels, but the number of channels is large, and it is sufficient to increase the number of bits if necessary.

At that time, if the write data and the already written data are the same, that is, if they are the same channel, it is possible to determine that they are the same and to prevent the data from being written into the memory. It is also possible to reduce.

Further, the nonvolatile memory is not limited to being divided into two, but may be divided into three or more. In this case, the ID bits are divided by the number corresponding to the divided number. What is necessary is just to set the number of ID bits to cover.

[0034]

According to the present invention, the number of rewrites of control data frequently operated in a television receiver and stored in a nonvolatile memory can be greatly reduced.
The time to reach the allowable number is twice as long as before,
High reliability can be maintained for a long time.

[Brief description of the drawings]

FIG. 1 shows a flowchart for reading to a memory of the present invention.

FIG. 2 shows a flowchart for writing to a memory according to the present invention.

FIG. 3 is a diagram showing a memory state according to the first embodiment of the present invention.

FIG. 4 is a diagram illustrating a memory state according to a second embodiment of the present invention;

FIG. 5 shows a block diagram of a television receiver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Television receiver 2 Microcomputer 3 Tuner 4 Tuning circuit 5 Intermediate frequency amplification circuit 6 Video output circuit 7 Audio output circuit 8 CRT 9 Speaker 10 CPU 11 ROM 12 RAM 13 Non-volatile memory 14, 18, 20, 21 Interface 15 Remote controller 16 Photodiode 17 Receiver circuit 19 Key switch circuit 22 Analog controller

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-99382 (JP, A) JP-A 64-44721 (JP, U) JP-A 64-52317 (JP, U) 53146 (JP, B2) (58) Field surveyed (Int. Cl. ⁷ , DB name) H04N 5/44

Claims (2)

(57) [Claims] At least one control value data which can be arbitrarily changed by a control operation and a pair of control data and identification data designating control data to be used are stored for each control value data. A storage area, a storage unit having the storage area as a pair, and a storage device having a unit for selecting the storage unit. The control value data is read from the storage means, and the read value read control value data from the other storage means if different, and the identification data of each storage means is compared when the control value data is changed by the control operation. If they are the same, the identification data of the other storage means is inverted and stored in the storage means. Writing means for inverting the identification data and storing the inverted data in the storage means; 2. A pair in which one or a plurality of control value data which can be arbitrarily changed by a control operation and identification data designating control data to be used are combined with the control value data, and stored for each control value data. A storage area, a storage unit having the storage area as a pair, and a storage device having a unit for selecting the storage unit. The control value data is read from the storage means, and the read value read control value data from the other storage means if different, and the identification data of each storage means is compared when the control value data is changed by the control operation. If they are the same, the identification data of the other storage means is inverted and stored in the storage means. A television receiver, comprising: a storage device comprising: writing means for inverting identification data and storing the inverted data in the storage means;