JPH0731620Y2 - Electronic graphic equalizer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an electronic graphic equalizer, and more particularly to an electronic graphic equalizer capable of recalling rewritable channel data relating to a graphic characteristic and variably setting the graphic characteristic with one touch. .

[Conventional technology]

The electronic graphic equalizer stores the current glyco data indicating the current glyco characteristic in the current graphic data memory.When the user manually changes the characteristics, the current graphic data is changed according to the operation and The current graphic data is output to an electronic graphic circuit to perform variable control of characteristics, and electronically variable setting of graphic characteristics can be performed.

Some of the electronic graphic equalizers have a channel calling function.

That is, a channel memory for storing rewritable graphic data for one or a plurality of channels is prepared, and when a user performs an operation of calling a certain channel, the operation channel data is called from the channel memory. , Output to the electronic graphic circuit to change and set the characteristics.

This allows the user to obtain desired characteristics with one touch.

[Problems to be solved by the device]

However, in the conventional electronic graphic equalizer, each channel data in the channel memory is set as flat data in advance at the manufacturer's shipping stage, and even if the user calls the set, the flat characteristic is set only when the channel calling operation is performed. Not done.

For this reason, it is not possible to set a certain flat graphic characteristic that is not flat without performing a troublesome characteristic changing operation for each band by manual operation. Furthermore, if you want to register the set characteristic in the channel memory, you must do the registration operation. did not become.

If you want to change the characteristics that were once registered in the channel memory to other characteristics and then return to the previously registered characteristics, you can manually change the characteristics for each band and perform the registration operation. It had to be done, and the operation was troublesome.

In view of the above-mentioned problems of the prior art, the object of the present invention is to provide an electronic graphic equalizer which allows a user to easily set a required non-flat graphic characteristic when purchasing a set.

Another object of the present invention is to make it possible to easily return to the characteristics registered in advance at the time of purchase of the set even after arbitrarily changing the channel data.

[Means for Solving the Problems]

The electronic graphic equalizer of the present invention calls a channel memory for storing channel data relating to a glyco characteristic for one or a plurality of channels rewritable by a user and channel data relating to a corresponding channel from the channel memory according to a channel calling operation. , An electronic graphic equalizer including a variable graphic characteristic control means for performing variable control of the graphic characteristic by outputting to the electronic graphic means.
Alternatively, as a plurality of channel data, at least one of the glyco data relating to one or a plurality of predetermined glyco characteristics including a non-flat characteristic is written in advance and is also written in the channel memory in advance.
Alternatively, the same data as a plurality of glyco data is stored as initialization data while being associated with a channel, an initialization operation means for performing an initialization operation for each channel, and an initialization operation means for initialization. When an operation is performed, the initialization data corresponding to the channel related to the operation is read from the initialization data memory, and the read initialization data rewrites the channel data of the channel related to the initialization operation in the channel memory. It is characterized by having and.

〔Example〕

 One embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a block diagram of an electronic graphic equalizer according to the present invention.

The input audio signal input from the source side of the previous stage is
It is input to an electronic graphic circuit 10 as an electronic graphic means, and after changing the graphic characteristics, it is output to an amplifier or the like in the subsequent stage.

This electronic graphic circuit 10 includes seven BPFs 12 to 24 connected in parallel to each other and each BPF 12 for an input audio signal.
Electronic volume 26-38 connected in series to the output side of ~ 24
And an adder circuit 40 connected to the output side of each electronic volume control 26-38.

The center frequencies of the passbands of the BPFs 12 to 24 are 60 Hz and 150, respectively.
It is set to Hz, 400Hz, 1kHz, 2.4kHz, 6kHz, 15kHz, and the input audio signal is multiplied from the low frequency side to the high frequency side to 7
Divide into two bands.

The electronic volumes 26 to 38 have a function of independently changing the signal level for each band and setting the graphic characteristics according to band-specific control data input from the outside.

Note that these electronic volumes 26-38 are -12 dB here.
The signal level shall be variably set in 2 dB units in the range of +12 dB.

The audio signals for each band output from the electronic volume controls 26 to 38 are added by the adder circuit 40 to obtain an electronic volume control.
It is output to the subsequent stage as an audio signal with the glyco characteristic set according to the setting amount of 26-38.

A microcomputer 42 is connected to each of the electronic volumes 26 to 38 of the electronic graphic circuit 10 so that band-specific control data can be input individually.

An operation unit 44 and a display unit 46 are connected to the microcomputer 42.

The operation unit 44 includes an up key 48 to 60 and a down key 62 to 74 for manually changing the characteristics of each band.
, Channel call keys 76 and 78, and a memory key 80 are provided, and a key-on signal according to a user's key-on operation is output to the microcomputer 42.

Channel call key 76 is the first channel, 78 is the second
Corresponds to the channel.

The memory key 80 is for setting the writing mode.

As shown in FIG. 2, the display unit 46 has a graphic characteristic display area 82, a channel number display area 84, and a write mode display area 86. The graphic characteristic display control, the channel display control, and the writing of the microcomputer 42 are performed. According to the mode display control, the display of the graphic characteristics, the channel display and the channel display are turned off, and the writing mode display and the writing mode display are turned off.

The microcomputer 42 has a CPU, a ROM, and a RAM connected to a bus, and based on a predetermined program stored in the ROM, channel call control according to a user's key operation, manual variable control, channel writing processing, initial channel data. The conversion processing, the display processing, etc. are executed.

In the ROM of the microcomputer 42, as shown in (1) of FIG. 3, the first initialization glyco data (hereinafter, referred to as “first initialization data”) ID1 corresponding to the first channel and the second channel respectively. And an initialization data memory area for storing the second initialization glyco data (hereinafter referred to as "second initialization data") ID2.

The first initialization data ID1 consists of band-specific data GA1 to GA7 corresponding to seven bands from low to high, and similarly the second initialization data ID2 corresponds to seven bands from low to high. It consists of band-specific data GB1 to GB7.

Further, in the RAM of the microcomputer 44, as shown in (2) of FIG. 3, the first channel graphic data (hereinafter, referred to as “first channel data”) UC1 of the first channel and the second channel and the first channel. 2-channel glyco data (hereinafter referred to as "second channel data") UC2
And a current memory area for storing the current memory data LD for the current memory characteristics.

The first channel data UC1 consists of band-specific data GC1 to GC7 corresponding to the seven bands from low to high, and similarly the second channel data UC2 includes 7 from low to high.
Band-specific data GD1 to GD7 corresponding to one band.

In addition, the current glyco data LD also includes band-specific data GE1 to GE7 corresponding to seven bands from low to high frequencies.

The RAM also has an area for storing the mode data a. When a = 1, the first channel calling mode is indicated, when a = 2, the second channel calling mode is indicated, and when a = 0, the manual mode is set. Shall be indicated.

Next, the operation of this embodiment will be described with reference to the flow charts of FIGS.

In addition, at the manufacturer's shipping stage, the first
Initialization data ID1 is GA1 to GA7 in order of −4,2,2,2,2, −
2, -4, the second initialization data ID2 is GB1 to GB7 in order-
2,0,0,0,2,2,4 are written (see (1) in FIG. 3).

The first initialization data ID1 is a characteristic effective for reducing scratch noise when an analog record is played.
Initialization data ID2 is a characteristic that is effective when you want to reproduce clear details such as when playing a CD.

These first and second initialization data ID1 and ID2 are fixed data and cannot be changed by the user who purchased the set.

In addition, the first channel data UC1 in the channel memory area of the RAM is set to the first
The same data as GA1 to GA7 of the initialization data ID1 has been written, and the second channel data UC2 has the same data as GB1 to GB7 of the second initialization data ID2 written in advance at the manufacturer shipping stage. (See (2) in FIG. 3).

Further, the current glyco data LD of the RAM is flat data in which all 0s have been written as GE1 to GE7 in advance at the manufacturer shipping stage (see (2) in FIG. 3).

When the ROM and RAM data of the microcomputer 42 are in the state shown in FIG. 3 and the user turns on the power switch for the first time after purchasing the set in the state where a = 0, the microcomputer 42 Performs the following processing as the power-on reset processing.

First, the current glyco data LD in RAM is read, and the band-specific data GE1 to GE7 is output to the electronic potentiometers 26 to 38 as hand-specific control data, and the signal level setting control is performed to set all band-specific signal levels to 0 dB. (Step 100 in FIG. 4).

As a result, the input audio signal input from the front stage side is output to the rear stage side with flat characteristics.

Subsequently, a graphic display control signal is created based on the current graphic data LD and is output to the display unit 46 to display the graphic display area 82.
Display a flat graphic characteristic on the screen (Step 10
2).

This allows the user to know that the flat characteristic is currently set.

Since the mode data a is initially 0 and is in the manual mode, the microcomputer 42 does not perform channel display control and nothing is displayed in the channel number display area 84 (NO in step 104).

Similarly, at the power-on reset stage, the microcomputer 42 does not perform the write mode display control either, and nothing is displayed in the write mode display area 86.

After performing the power-on reset process, the microcomputer 42 waits for a key-on signal related to the user's key-on operation from the operation unit 44 (step 10).
6, 108, 200, 202 in FIG. 5).

Immediately after purchasing the set, the user is not yet accustomed to the operation.For example, in order to play an analog record, try to set the glyco characteristic effective for reducing scratch noise by manual variable operation, or clear the details in CD playing. Even if you try to set a characteristic that is effective for listening, you cannot do it immediately.

However, when the user turns on the channel call key 76 for a short time, for example, the microcomputer 42 is activated by the key-on signal relating to the channel call key 76 output from the operation unit 44, and the microcomputer 42 turns on the channel call key.
It is determined that 76 has changed from off to on (step 106 in FIG. 4), the mode data a is changed to 1 (step 109),
After setting the 5s timer that measures time for 5 seconds and starting the time measurement (step 110), the 1st channel data UC1 in the channel memory area of the RAM is used for the current graphic data LD.
(Step 112), and outputs the band-specific data GE1 to GE7 of the current glyco data LD after rewriting to the electronic potentiometers 26 to 38 as band-specific control data, and controls the signal level setting to set 60Hz- 4, 150Hz to 2.4kH
z is set to 2, 6 kHz is set to -2, and 15 kHz is set to -4 (dB) (step 114).

As a result, the levels of the low frequency band and the high frequency band of the input audio signal input from the front stage side are dropped and output to the rear stage side.

Subsequently, the microcomputer 42 creates a graphic display control signal based on the rewritten current graphic data LD and outputs it to the display unit 46 to display the graphic characteristics in the graphic display area 82 (step 116).

This allows the user to know the current characteristics.

Further, the microcomputer 42 controls the channel display by referring to the mode data a = 1 and displays "1" in the channel number display area 84 to indicate that the first channel is being called (step 118, first). (Refer to the display state in Figure 2).

When the user turns on the channel call key 76 for a short period of time, the key-on signal is not input before the 5s timer times out, so the microcomputer 42 makes a NO determination in steps 120 and 122 and then proceeds to step 12 first.
When 0 is determined to be YES, the channel calling process is ended.

When the user turns on the channel call key 78 for only a short time, the microcomputer 42 is activated by the key-on signal relating to the channel call key 78 output from the operation unit 44, and the microcomputer 42 turns the channel call key 78 from off to on. Judging that it has changed (step 108 in FIG. 4),
After changing the mode data a to 2 (step 124) and setting the 5s timer for counting 5 seconds to start the counting (step 126), the second channel data UC2 in the channel memory area of the RAM is used for the current graphic. The data LD is rewritten (step 128), and the data GE1 to GE7 for each band of the current graphic data LD after rewriting is output to each electronic volume 26 to 38 as the control data for each band, and the signal level setting control is performed to 60 Hz. -2, 150Hz to 1kHz 0,
Set 2.4kHz and 6kHz to 2 and 15kHz to 4 (dB) (step 130).

As a result, the level of the low frequency band is lowered, and the high frequency band is raised and output to the rear stage side.

Subsequently, the microcomputer 42 creates a graphic display control signal based on the rewritten current graphic data LD and outputs it to the display unit 46 to display the graphic characteristics in the graphic display area 82 (step 134).

This allows the user to know the current characteristics.

Further, the microcomputer 42 controls the channel display with reference to the mode data a = 2 and displays "2" in the channel number display area 84 to indicate that the second channel is being called (step 136).

When the user turns on the channel call key 78 for a short time, the key-on signal is not input before the 5s timer times out. Therefore, the microcomputer 42 makes a NO determination in steps 138 and 140 and then proceeds to step 13 first.
When YES is determined in 8, the channel calling process is finished.

In this way, even after registering the channel data immediately after purchasing the set, it is possible to set two types of non-flat graphic characteristics by simply calling the channel, and when playing an analog record. , Scratch noise can be reduced, details can be made clear when playing a CD, and the desired graphic characteristics can be set easily and quickly without manually changing the characteristics. .

Also, immediately after purchasing the set, the channel call key 76,7
When the 8 is operated, the graphic characteristics are switched, so it can be confirmed that the set is not broken.

In addition, for example, 60Hz is -2, 150Hz to 1kHz depending on the channel call mode of the 2nd channel while playing a CD.
With 0, 2.4kHz and 6kHz set to 2 and 15kHz set to 4 (dB), the user has to lower the level in the low range a little and raise the level in the high range a little. Is turned on once, the down key is pressed from the operation unit 44.
A key-on signal relating to 62 is output to the microcomputer 42.

The microcomputer 42 is urged by this key-on signal, determines YES in step 200 of FIG. 5, sets the mode data a to 0, and sets the manual mode state (step 204). The data GE1 for each band relating to 60 kHz which is variably operated by the user this time is decreased by 2 (dB) for one unit to be -4 (step 20).
6).

Then, the data GE1 to GE7 for each band of the current glyco data LD after the variable is output to each electronic volume 26 to 38 as the control data for each band, and 60 Hz is -4, 150 Hz is 1 kHz to 0, 2.4 kHz and 60 kHz are 2 , 15kHz is set to 4 (dB) (step 208).

As a result, the level of the low frequency range is lowered by one unit.

Subsequently, the microcomputer 42 creates a graphic display control signal based on the rewritten current graphic data LD and outputs it to the display unit 46 to display the graphic characteristics in the graphic display area 82 (step 210).

This allows the user to know the changed characteristics.

Further, the microcomputer 42 refers to the mode data a = 0 to control the channel display to be off, and erases the channel number display area 84 to indicate that the manual mode is currently set (step 212).

Similarly, when the user turns on the down key 62 once again, the microcomputer 42 is urged by the key-on signal output from the operation unit 44 to cause the microcomputer 42 to perform the step 200 in FIG.
It is determined to be YES, GE1 of the current glyco data LD is decreased by 2, and the electronic graphic circuit 10 and the display unit 46 are controlled based on the changed current graphic data LD to further lower the level of 2 dB. Lower (Step 2)
04-212).

On the contrary, the user has to
When the up key 60 for 15 kHz is turned on once, the microcomputer 42 is activated by the key-on signal for the up key 60 output from the operation unit 44, and the microcomputer 42 performs the steps shown in FIG.
If YES is determined in 200, GE7 of the current graphic data LD is increased by 2 (dB) for one unit, and the electronic graphic circuit 10 and the display unit 46 are controlled based on the changed current graphic data LD. Raise the high-frequency level by 2 dB (steps 204-212).

As a result, 60Hz is -6,150Hz to 1kHz is 0,2.4kHz and 6kHz.
Is set to 6 (dB) at 2,15kHz.

When the user wants to register this graphic characteristic in the second channel, first, the memory key 80 of the operation unit 44 is turned on once.

Then, being pressed by the key-on signal relating to the memory key 80 output from the operation unit 44, the microcomputer 42 determines YES in step 202 of FIG. 5, and sets a 5s timer for counting 5 seconds to set the timing. After starting (Step 21
4) The write mode display control is performed on the display unit 46 to cause the write mode display area 86 to display the write mode composed of the characters "MEMORY" (step 216).

The user confirms that the writing mode is set by looking at this display, and within five seconds after the memory key 80 is turned on, the channel call key 78 is turned on once to specify the writing channel.

After the process of step 216, the microcomputer 42
The determination as to whether or not the time is up (step 218) and the determination as to whether or not the channel call key 76 or 78 has been turned on are repeated (steps 220 and 222), and the operation section 44 controls the channel call key 78. The microcomputer 42 that has input the key-on signal is YES in step 222.
After setting the mode data a to 2 (step 22
4) Rewrite the channel data UCa = UC2 of the second channel with the current glyco data LD (step 226).

As a result, GD1 = -6, GD2 to GD4 = 0, GD5, GD6 = 2, GD7 = 6
Becomes

Further, the microcomputer 42 refers to the mode data a and controls the display section 46 to display a channel, and displays "2" in the channel number display area 84 to indicate that the channel is in the calling state of the second channel. At the same time (step 228), the writing mode display is turned off to erase the "MEMORY" character display to indicate that the writing mode has been released (step 230).

If the user does not perform the channel designation operation within 5 seconds after the memory key 80 is turned on, the microcomputer 42 determines YES in step 218, moves to step 230, and cancels the write mode.

After that, even if the user changes the graphic characteristic in the manual mode again, if the channel call key 78 is turned on once, the microcomputer 42 performs the channel call process, and 60 Hz is -6,150 Hz to 1 kHz is 0,2.4 kHz. And 6
kHz is set to 2,15 kHz is set to 6 (dB).

In this way, since the second channel data UC2 previously stores the graphic data suitable for clearing the details when playing the CD, a slight characteristic correction is performed by the manual variable operation after calling the channel. Only by doing so, it is possible to quickly set the user-desired glyco characteristic, and by performing the registration operation after the correction and storing it in the channel memory, the desired glyco characteristic can be set with one touch at any time.

It should be noted that the second channel data UC2 changed to the user's preference
To restore the initial data written by the manufacturer at the beginning, the channel call key 78 is continuously turned on for 5 seconds or more.

Then, first, when the key-on signal related to the channel call key 78 is input, the microcomputer 42 determines YES in step 108 of FIG. 4, changes the mode data a to 2 (step 124), and then the 5s timer. Set (step 126) and once set the current graphic data LD to the second
It is rewritten with the channel data UC2 (step 128), the electronic graphic circuit 10 is controlled and the display of the graphic characteristics is controlled based on the current graphic data LD after the rewriting, and 60 Hz is −
6,150Hz to 1kHz is 0, 2.4kHz is 2,6kHz is 2,15kHz is 6 (d
B) Set the glyco characteristic (steps 130, 13)
Four).

Further, referring to the mode data a = 2, “2” is displayed in the channel number display area 82 of the display unit 46 (step
136).

Then, the microcomputer 42 determines whether the key-on signal relating to the channel calling key 78 input from the operation unit 44 is lost or which time is up (steps 138 and 140).

In this case, the user continues to turn on the channel call key 78 for 5 seconds or more, so the time is up first and the microcomputer 42 determines YES in step 140, and then the RO
The second channel data UC2 is rewritten with the second initialization data ID2 of M (step 142).

As a result, the second channel data UC2 is GD1 = −2, GD
2 to GD4 = 0, GD5, GD6 = 2, GD7 = 4 and return to the initial state.

Subsequently, the microcomputer 42 is currently using the glyco data.
The LD is rewritten with the second initialization data ID2, and the electronic graphic circuit 10 is controlled and the display of the graphic characteristics is controlled based on the current graphic data LD after the rewriting. 60Hz is -2,150Hz to 1kHz is 0,2.4kHz and 6kHz. 2,15kHz is set to 4 (dB) Glyco characteristic (steps 144 to 148).

As a result, the glyco characteristics based on the second channel data registered as the glyco data relating to the non-flat glyco characteristics at the time of purchase of the set can be restored with one touch, and there is no need to manually restore the glyco characteristics.

After that, even if the Glyco characteristics are manually changed again, if the second channel is called by a short-time ON operation of the channel call key 78, the initially written Glyco characteristics can be set easily at any time. it can.

Similarly for the first channel, even if the channel data that was written in advance by the manufacturer at the time of purchase of the set is changed, it can be easily written to the first by easily pressing the channel call key 76 for 5 seconds or longer. The initial data can be initialized.

According to this embodiment, as the first channel data UC1 and the second channel data UC2 in the channel memory area of the RAM, the glyco data relating to the two types of non-flat glyco characteristics are written in advance at the manufacturer shipping stage. Channel call key after user purchases a set
If you turn on 76 or 78 for a short time and call up a channel, you can immediately set the predetermined non-flat graphic characteristics, and easily and quickly set the desired graphic characteristics even if you are not familiar with the operation method. it can.

Also, even if you want to set the Glyco characteristics that are slightly different from the Glyco characteristics that were written as channel data on the manufacturer side in advance, you can quickly and easily by simply modifying the characteristics by manual variable operation after calling the channel. It can be set to the characteristics desired by the user.

Further, if the channel call key 76 (or 78) is continuously turned on for 5 seconds or more to perform the initialization operation, regardless of the contents of the first channel data UC1 (or the second channel data UC2) up to that point, Since the first channel data UC1 (or second channel data UC2) is rewritten with the first initialization data ID1 (or second initialization data ID2) having the same contents as written by the manufacturer,
This can be easily done if the user wants to return the changed 1st channel data UC1 (or 2nd channel data UC2) to the initial state at the time of set purchase. At this time, the graphic characteristics for the input audio signal are also initially set. Since it is changed to the characteristic written in, it is not necessary to perform the channel call operation after performing the initialization operation when it is desired to return the glyco characteristic itself to the initial state.

In the above-described embodiment, the channel memory has two channels, but the number of channels may be three or more, and the non-flat graphic data previously written as channel data on the maker side is not all channels but one channel. You may make it write in only one or several channels.

Further, when the channel call keys 76 and 78 are turned on for a short time, when the normal channel call operation is performed and when the channel call keys are turned on continuously for 5 seconds or more, the microcomputer 42 processes as an initialization operation, and the operation is also used. Although the number of keys is prevented from increasing by doing so, a dedicated key for each channel for initialization operation may be provided.

[Effect of device]

According to the electronic graphic equalizer according to this invention,
As one or a plurality of channel data of the channel memory, at least one is previously written with one or a plurality of predetermined glyco characteristics including a non-flat characteristic, so that the user can immediately purchase the set immediately after purchasing the set. Even if you don't know how to operate, you can easily set the required graphic characteristics just by calling the channel.

In addition, an initialization data memory in which the same data as one or more pieces of glyco data to be written in the channel memory in advance is stored as initialization data while being associated with a channel, and an initialization operation for performing an initialization operation for each channel Means and the initialization operation means, the initialization data corresponding to the channel related to the operation is read from the initialization data memory, and the initialization data read out is used to perform the initialization operation in the channel memory. By providing the initialization means for rewriting the channel data of the channel concerned, even after changing the channel data from the previously written graphic data, it is possible to easily restore the previously written data to the user. It is very convenient.

[Brief description of drawings]

FIG. 1 is a block diagram of an electronic graphic equalizer according to one embodiment of the present invention, FIG. 2 is an external view showing an example of a display state of a display section in FIG. 1, and FIG. Explanatory diagrams of data stored in the memory of the microcomputer, FIGS. 4 and 5 are flow charts showing the operation of the microcomputer in FIG. Explanation of main symbols 10: Electronic graphic circuit, 42: Microcomputer, 44:
Controls, 76, 78: Channel call keys.

Claims (1)

[Scope of utility model registration request] 1. A channel memory storing user-rewritable channel data relating to one or a plurality of channels of a glyco characteristic, and channel data relating to a corresponding channel is recalled from the channel memory in accordance with a channel recall operation. In the electronic graphic equalizer, which includes a variable graphic characteristic control means for outputting the variable characteristic to the means for variable control of the graphic characteristic, at least one of the channel data of the channel memory includes at least one non-flat characteristic in advance. Alternatively, while writing a plurality of pieces of glyco data relating to a predetermined glyco characteristic, the same data as one or a plurality of pieces of glyco data to be written in the channel memory in advance is used as initialization data while being associated with a channel. When the initialization operation is performed by the initialization data memory, the initialization operation memory that performs initialization operation for each channel, and the initialization operation means, the initialization data corresponding to the channel related to the operation is saved from the initialization data memory. An electronic graphic equalizer, comprising: an initialization unit that reads out and rewrites the channel data of the channel related to the initialization operation in the channel memory by the read initialization data.