JPH0667027B2 - Automatic sound field correction device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic sound field correction apparatus suitable for use in audio equipment, particularly electronic equipment of the type in which audio equipment is combined with video equipment.

[Conventional technology]

Conventionally, audio products have been composed of audio-related products only, but recently, video products such as video tape recorders and TV receivers have been combined to form an integrated audio / video product. ing.

Therefore, in the case of a product configured with only audio equipment, the main purpose was to hear good sound faithfully, but when combined with video equipment, for example, a sound with an effect that matches the situation of the projected screen is desired. It started to come. Therefore, there is a need for an electronic device that produces a sound with this effect, and one of them is a so-called graphic equalizer. By using this, it is possible to reproduce sound with different frequency characteristics depending on the source to be enjoyed, such as audio, TV, VTR, and produce its effect.

[Problems to be solved by the invention]

However, the usage of the conventional graphic equalizer is extremely complicated in terms of handling. In other words, there was the inconvenience of having to readjust each time the source changed to obtain an appropriate sound field.

The present invention has been made in view of the above circumstances, and provides an automatic sound field correction device that is easy to handle and can appropriately present the best sound effect as necessary.

[Means for solving problems]

The present invention is a plurality of audio equipment (4) ~ (8), (11), (12) and / or video equipment (9), (10), (13) are connected, the above equipment (4) ~ (1.
Function keys (1a) to (1
Function selector (1) having f), and room sound field characteristics according to the indoor environment and audio and video equipment (4) ~
Memory (2a) to (2
Connect the graphic equalizer (2) with d) with the dedicated line (3), and select the device (4) to (1) according to the selection of the function keys (1a) to (1f) of the function selector (1).
2) The graphic equalizer (2) memory (2a) to (2d) memory (2a) to (2d) both the correction characteristics of the sound source and the room sound field characteristics are called and calculated to correct the characteristics of the sound source. This is a characteristic automatic sound field correction device.

[Action]

For example, serial data can be transmitted by connecting the function selector (1) and the graphic equalizer (2) having a plurality of memories (2a) to (2d) capable of storing the sound field correction curve with the dedicated line (3). Made like a function selector
In conjunction with the switching of (1), recall the correction characteristics of the sound source corresponding to the sources stored in the memories (2b) to (2d), and recall the room sound field characteristics stored in the memory (2a).
A desired sound field characteristic is obtained by the combined characteristic of both.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to FIGS.

FIG. 1 shows the configuration of this embodiment. In FIG.
(1) is a function selector with a built-in microcomputer, (2) is a graphic equalizer having a plurality of memories (2a) to (2d), and (3) is a function selector
A dedicated line that connects between (1) and the graphic equalizer (3), and serial data (for example, consisting of 12 bits) as shown in FIG. 2 via this dedicated line (3) will be described later. As described above, the function selector (1) is interlocked with the switching of the function, and is supplied to the graphic equalizer (2), and the corresponding memory incorporated therein is selected.

Further, (4) is a tuner, (5) is a compact disc player (hereinafter referred to as a CD), (6) and (7) are tape recorders,
(8) is a record player, (9) is a TV tuner, (10) is a video tape recorder (hereinafter referred to as VTR),
The player (8) is connected to the function selector (1) via the amplifier (11), but the others are directly connected to the function selector (1). Further, (12) is a speaker connected to the output side of the amplifier (11), and (13) is a monitor television connected to the function selector (1).

The function selector (1) has a plurality of function keys corresponding to the above-mentioned devices, and (1a) is a tuner.
Function keys corresponding to (4), (1b) function keys corresponding to CD, (1c) function keys corresponding to player (8), (1d) and (1e) tape recorders (5) and (1e), respectively. Function key corresponding to 6), (1f) is TV
Function key for tuner (9), V for (1g)
It is a function key corresponding to TR (10).

In addition, the function selector (1) has a specific key (1h) related to the graphic equalizer (2), and when this key is pressed, the information from each device will pass through the graphic equalizer (2) and the amplifier Although it is output to the (11) side, if it is not pressed, it is output to the amplifier (11) side as it is without passing through the graphic equalizer (2).
Further, the function selector (1) is provided with a receiving section (1i) for remote control, and the remote control device (not shown) is also provided with the same function keys as described above. Control signal is received by the receiving unit
It is received by (1i), and the same operation as operating the function keys (1a) to (1g) can be performed.

The graphic equalizer (2) has a plurality of memories (2a) to (2d) as described above. For example, in the 0th memory (2a), the room sound field characteristic according to the room environment is stored in advance. The memory (2b) of the audio device, for example a tuner (4), C
Typical correction characteristics of sound sources such as D (5), tape recorders (6), (7) and player (8) are the graphic equalizer (2).
2nd and 3rd memory (2c)
And (2d) store the correction characteristics of the sound sources of the TV tuner (9) and the VTR (10), respectively, by adjusting the graphic equalizer (2).

Further, the graphic equalizer (2) has a receiving section (2e) for remote control and a display section (2f) for instructing which memory is selected.

Next, the operation of this circuit will be described.

First, a method of storing the correction characteristics of each sound source in each memory will be described. For example, if you want to store the desired characteristics of the sound source of the tuner (4), use the function selector
Press the function key (1a) of (1). Then, serial data as shown in FIG. 2 is supplied from the function selector (1) via the dedicated line (3) to the graphic equalizer (2) as address information, and the corresponding memory, in this case the memory (2b), is selected. To be done. At the same time, the tuner (4) is selected as the source, and the signal from the tuner (4) is sent via the function selector (1) to the graphic equalizer.
It is supplied to (2), and the output of this graphic equalizer (2) passes through the graphic equalizer (2) again and the amplifier (11)
The sound is emitted from the speaker (12) via the.

Therefore, in such a state of the graphic equalizer (2), the frequency characteristic is adjusted so that the sound field emitted from the speaker (12) has the most preferable characteristic. When the adjustment is completed, the correction characteristics of the sound source at that time are stored in the memory (2b). The correction characteristic at this time is, for example, a curve a shown in FIG. 3A.

Also, CDs (5), tape recorders (6), (7) and players
The same applies to the signal from (8). However,
In the case of the player (8), the output of the player (8) is once amplified by the amplifier (11) and then supplied to the graphic equalizer (2) side via the function selector (1) in view of the gain.

These tuners (4), CDs (5), tape recorders (6),
The sound sources from (7) and the player (8) have almost the same characteristics, so in this case, do not put them individually, but adjust one of the representative ones and put it in the memory (2b) as the correction characteristic. I will leave it. If necessary, a memory may be separately provided for each of the sound sources such as the tuner (4), the CD (5), ... To store the correction characteristic for each sound source.

When it is desired to store the desired characteristics of the sound source of the TV tuner (9), the function key (1f) of the function selector (1) is pressed. Then, the memory (2c) in the graphic equalizer (2) is selected, the TV tuner (9) is simultaneously selected as a source, and the audio signal from the TV tuner (9) is sent via the function selector (1) to the graphic equalizer (2). 2), and the output of the graphic equalizer (2) passes through the graphic equalizer (2) again and is emitted from the speaker (12) via the amplifier (11). The video signal is supplied from the TV tuner (9) to the monitor television (13) through the function selector (1).

And in the graphic equalizer (2), in such a state,
The sound field emitted from the speaker (12) is adjusted to have the most preferable characteristics. When the adjustment is completed, the correction characteristics of the sound source at that time are stored in the memory (2c). The correction characteristic at this time is, for example, a curve a shown in FIG. 3B.

Also, when it is desired to store the desired characteristics of the sound source of the VTR (10), the same operation as described above is performed except that the memory (2d) is selected. The correction characteristics at that time are shown in FIG. 3C, for example. A curve a as shown is stored in the memory (2d).

In this way, in the initial stage, the desired correction characteristics of the sound source corresponding to each source are stored in the memories (2b) to (2d), respectively, if necessary.
Memorized in.

Then, from the next operation, by pressing the function key corresponding to each source, the memory (2b)
~ Desired correction characteristics stored in (2d) and memory (2a)
The room sound field characteristics stored in (1) are called, and these are calculated by the microcomputer to obtain the desired sound field characteristics.

For example, tuner (4), CD (5), tape recorder (6),
If you want to listen to either (7) or the player (8), press the corresponding function key (1a) to (1e) and the source corresponding to that key will be selected and the graphic will be displayed at the same time. The memory (2b) in the equalizer (2) is selected, and the characteristic of the signal from the selected source is now selected in the memory (2b), eg the curve a shown in FIG. 3A.
And the room sound field characteristic such as the curve b shown in FIG. 3A, for example. Then, the corrected signal is emitted from the speaker (12) via the amplifier (11). At this time, the sound field characteristic emitted from the speaker (12) is a desired characteristic which is flat over the entire area as shown by a curve c in FIG. 3A, for example.

Also, when the user wants to listen to the TV tuner (9) and VTR (10), the same operation is performed. When the function keys (1f) and (1g) are pressed, the TV tuner (9) and VTR (10) are selected, respectively. At the same time the memory (2c) in the graphic equalizer (2)
And (2d) are selected respectively, TV tuner (9) and VTR
The characteristics of the audio signal from (10) are corrected here, for example as shown by the curves a shown in FIGS. 3B and 3C stored in the memories (2c) and (2d), respectively. The room sound field characteristics such as the curve b shown in B and C are taken into consideration for the correction.
Then, the corrected audio signal is emitted from the speaker (12) via the amplifier (11). At this time, the sound field characteristic emitted from the speaker (12) is a desired characteristic as shown by a curve c in FIG. 3B when the TV tuner (9) is selected, and the VTR (10) is also selected. When is selected, the desired characteristic is shown by the curve c in FIG. 3C, for example.

In this way, by simply pressing the function key, the desired sound field characteristic of the source corresponding to the key can be automatically obtained.

Note that the source is not limited to the above-mentioned types, and is similarly applicable to other sources including a sound source. Further, it goes without saying that the correction characteristics of the sound source and the room sound field characteristics are not limited to the characteristics shown in FIG. 3 and can be arbitrary characteristics according to preference.

〔The invention's effect〕

As described above, according to the present invention, both the correction characteristic of the sound source and the room sound field characteristic stored in advance in the memory of the graphic equalizer can be called in association with the switching of the function selector. It is not necessary to readjust the graphic equalizer each time it changes, you can automatically obtain the desired sound field characteristics of the corresponding source by simply pressing the function key of the function selector, and it is easy to handle and improve operability .

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram showing an embodiment of the present invention, and FIGS. 2 and 3 are diagrams for explaining the operation of FIG. (1) is a function selector, (2) is a graphic equalizer, (2a) to (2d) are memories, and (3) is a dedicated line.

Claims (1)

[Claims] 1. A function selector having a plurality of audio equipments and / or video equipments connected thereto and having a function key capable of selecting any one of the above equipments, and a room sound field characteristic according to an indoor environment and sound and video equipments. Connected to the graphic equalizer having a memory in which the correction characteristics of the sound source of the device are stored in advance by a dedicated line, and in the memory of the graphic equalizer of the device selected according to the selection of the function key of the function selector. An automatic sound field correction device, characterized in that both the stored correction characteristic of the sound source and the stored room sound field characteristic are called and calculated to correct the characteristic of the sound source.