JPH06225400A - Sound field controller - Google Patents

Abstract

PURPOSE:To provide a sound field effect controller for automatically switching a sound field effect mode interlocked with the changeover of an input source by reading the stored sound field effect mode interlocked with the changeover of the input source and automatically setting it. CONSTITUTION:A memory control means 106 constituted of a microcomputer 108 detects an input source switching operation in an input source selecting operation means 34 and stores the sound field effect mode applied immediately before the changeover to the other input source at every input source in a sound field effect mode storage means 104. A sound field effect mode switching control means 70 sets to the pertinent sound field effect mode when a sound field effect mode setting operation means 35 is operated.and reads and automatically sets to the sound field effect mode stored in the means 104 when the means 34 is operated for the sound field effect mode in a sound field effect processor 42. Thus, the need of resetting the sound field effect mode every time the input source is switched is eliminated and an operation can be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound field control device for imparting a sound field effect during music reproduction, and is adapted to automatically switch sound field effect modes in conjunction with input source switching. .

[0002]

2. Description of the Related Art Recent music reproduction is required to impart a so-called sound field effect as a more advanced function.
The sound field effect is an effect that can give a feeling of being in a different space such as an actual hall while staying in a small room. The sound field effect is the reflected sound data obtained by arranging at least four speakers so as to surround the room where the sound field is to be reproduced, and corresponding to each virtual sound source position of the reflected sound in the acoustic space such as a hall. Based on the above, in order to reproduce a large number of reflected sounds in the acoustic space or a model space similar thereto in the room using the respective speakers, the impulse response characteristics of the reflected sound group to be emitted by the respective speakers are reflected. Each of the reflected sound parameters is stored as a sound parameter, and a convolution operation is performed on a common source signal based on each of the stored reflected sound parameters, so that signals of a large number of reflected sound groups (sound effect signal ) Is generated and supplied to each corresponding position of each speaker (for details, see Japanese Patent Application No. 60-992). No. 4, No. Sho 60-
193582).

FIG. 2 shows a conventional system configuration in the case of giving a sound field effect in music reproduction. Source signals 16, 18, and 20 sent from source devices such as a CD (compact disc) player 10, an LV (laser vision disc) player 12, and a tape deck 14 are input terminals 22, 24, and 26, respectively. Sound field control device 2
8 is input.

The sound field control device 28 is configured here as a stereo pre-main amplifier having a sound field effect imparting function, and inputs each input source signal 16, 18, 20 to the input selector 30. The input selector 30 outputs any one source signal in response to the operation of the input source selection operation means 34 (input source selection key) provided as an operation key on the front panel of the sound field control device 28 or the remote controller 32. Select and output. After the selected source signal is processed by tone control, level control, etc.,
The left and right two-channel main signal 36 is output from the output terminal 40 via the power amplifier 38.

Further, the source signal output from the input selector 30 is input to the sound field effect processor 42, and the left and right two channels are combined into one channel, and then the front left, the front right, the rear left, and the rear right are divided into four. A signal (sound field effect sound signal) 44 of the reflected sound group in each direction is generated by performing convolution calculation with the reflected sound parameter in each direction. The sound field effect processor 42 stores, as the sound field effect mode, reflected sound parameters for each direction in various acoustic spaces (hall, stadium, jazz club, church, etc.), and the front panel of the sound field control device 28 or The reflected sound parameter of an arbitrary sound field effect mode is read according to the sound field effect mode selection operation by the sound field effect mode setting operation means 35 (sound field effect selection key) provided as an operation key on the remote controller 32. Issued
The sound field effect sound signal 44 is generated. The generated sound field effect signal 44 is output to the output terminal 4 via the power amplifier 46.
It is output from 8.

The left and right two-channel main signals 36 output from the sound field control device 28 are main speakers 52, 54 arranged in front of the listening position of the listening room 50.
Is supplied to each. Further, the 4-channel sound field effect sound signal 44 is supplied to the sound field effect speakers 56, 58, 60, 62 arranged near the four corners of the listening room, respectively. The front left and right sound field effect sound signals are added to the left and right main signals and supplied to the main speakers 52 and 54.
Can be omitted. With the above configuration, it is possible to enjoy music reproduction in the listening room 50 in an atmosphere as if in an actual sound field space.

As described above, in the conventional sound field control device 28 of FIG. 2, the selection of the input source and the setting of the sound field effect mode are independent, and the preferable sound field effect mode is changed every time the input source is switched. I was trying to switch to.

[0008]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention CD player 10, L
When the input source is switched and used while the V player 12 and the tape deck 14 are equipped with specific music software, the sound field effect mode used for each device 10, 12, 14 may be fixed. There are many. However,
In such a conventional sound field control device, even in such a case, the sound field effect mode has to be switched every time the input source is switched, and the operation is troublesome.

The present invention solves the above problems in the prior art, and provides a sound field effect control device for automatically switching the sound field effect mode in conjunction with the switching of the input source. Is.

[0010]

According to the present invention, a plurality of source input terminals for respectively inputting source signals output from a plurality of source devices, an input source selecting operation means for performing an input source selecting operation, An input selector that inputs a plurality of source signals input from input terminals and selectively outputs the source signal selected and operated by the input source selection operation means, and a sound field effect of the source signal output from the input selector. Sound field effect sound signal generation means for generating a sound signal, sound field effect mode setting operation means for setting and operating the mode of the sound field effect to be generated by this sound field effect sound signal generation means, and for each of the input sources, Sound field effect mode storage means for respectively storing the sound field effect mode to be applied, and the sound field effect mode storage means for each of the input sources. The sound field effect mode setting of the memory control means for storing the sound field effect mode applied immediately before the input selector is switched to another input source and the sound field effect mode of the sound field effect sound signal generating means are set to the sound field effect mode. When the operation means is operated, it is set to the corresponding sound field effect mode, and when the input source selection operation means is operated,
Sound field effect mode switching control means for switching the sound field effect mode stored in the sound field effect mode storage means for the corresponding input source.

[0011]

According to the present invention, the sound field effect mode applied immediately before switching to another input source is stored for each input source, and when the input source is returned to the original sound effect mode, Since the field effect mode is read out and automatically set to that sound field effect mode, there is no need to reset the sound field effect mode each time the input source is switched,
Operation becomes easy. Moreover, since the sound field effect modes can be switched independently, the sound field effect modes can be automatically set in accordance with the input source switching and then changed according to preference.

[0012]

FIG. 1 shows an embodiment of the present invention. Source signals 16, 18, 20 transmitted from a source device such as a CD player 10, an LV player 12, a tape deck 14, etc.
Are input to the sound field controller 68 via the input terminals 22, 24 and 26, respectively.

The sound field control device 68 is configured here as a stereo pre-main amplifier having a sound field effect imparting function, and inputs each input source signal 16, 18, 20 to the input selector 30. The input selector 30 selects and outputs any one source signal according to the operation of the input source selection operation means 34 provided as an operation key on the front panel of the sound field control device 68 or the remote controller 32.
The selected source signal is subjected to processing such as tone control and level control, and is then output as a main signal 36 for the left and right channels via the power amplifier 38 to the output terminal 4.
It is output from 0.

The source signal output from the input selector 30 is a sound field effect sound generating means (sound field effect processor).
After being input to 42, the left and right two channels are combined into one channel by left + right or left-right calculation, and then the left and right front, right, rear left, and rear right reflected sound parameters and convolution are calculated. As a result, signals (sound field effect sound signals) 44 of reflected sound groups in each direction are generated. The sound field effect processor 42 stores, as the sound field effect mode, reflected sound parameters for each direction in various acoustic spaces (hall, stadium, jazz club, church, etc.), and the sound field effect mode switching control means 70 controls the sound field effect mode. Depending on the switching control of the sound field effect mode,
The reflected sound parameter of the sound field effect mode is read out, and the sound field effect sound signal 44 is generated. The generated sound field effect sound signal 44 is output to the output terminal 48 via the power amplifier 46.
Is output from.

The left and right two-channel main signals 36 output from the sound field controller 28 are supplied to the main speakers 52 and 54 arranged in front of the listening position of the listening room 50 shown in FIG. In addition, the 4-channel sound field effect sound signals 44 are sound field effect speakers 56, 58, 60, 6 arranged near the four corners of the listening room.
2 respectively. The front left and right sound field effect sound signals are added to the left and right main signals, and main speakers 52 and 54 are added.
, The sound field effect speakers 56 and 58 on the front and left can be omitted. With the above configuration, it is possible to enjoy music reproduction in the listening room 50 in an atmosphere as if in an actual sound field space.

A concrete example of the sound field effect processor 42 is shown in FIG. The source signal is converted into a digital signal by an A / D converter 74 through a low pass filter 72 for preventing aliasing at the time of A / D conversion. Further, in order to impart a frequency characteristic to the reflected sound, it is branched into each channel and passed through digital filters 76, 78, 80, 82. The source signals output from the digital filters 76, 78, 80, 82 are reflected sound generation circuits 84,
It is input to 86, 88, 90.

In the ROM 92, various acoustic spaces (holes, halls, etc.) composed of delay time data and gain data as shown in FIG.
Reflected sound parameters for each direction in a studio, jazz club, church, karaoke room, etc.) are stored. The reflected sound generation circuits 84, 86, 88, 90 are those R
The reflected sound (sound effect sound) signal of the source signal is generated for each channel by performing convolution calculation with the source signal based on the reflected sound parameter stored in the OM 92. These sound field effect signals generated are
The D / A converter 94 performs time-division multiplex D / A conversion. The output signal of the D / A converter 94 is distributed to each channel, and the low-pass filters 96, 98, 10 are distributed.
The signal is smoothed by 0 and 102, converted into an analog signal and output.

The switching control of the sound field effect mode in the sound field control device 68 of FIG. 1 will be described. The sound field effect mode setting operation means 35 indicates any one sound field effect mode from various sound field effect modes stored in the sound field processor 42 by the selection operation of the listener.

The sound field effect mode storage means 104 has a storage area for storing the sound field effect mode to be applied for each input source. The memory control means 106 composed of the microcomputer 108 detects the input source switching operation in the input source selection operating means 34, and the sound field effect applied immediately before switching to another input source for each input source. The mode is stored in the sound field effect mode storage means 104.

The sound field effect mode switching control means 70 detects the sound field effect mode in the sound field effect processor 42 when the sound field effect mode setting operation means 35 is operated, and detects the corresponding operation. When the field effect mode is set and the input source selection operation means 34 is operated, the operation is detected and the sound field effect mode stored in the sound field effect mode storage means 104 is read out for the input source after switching. And set this sound field effect mode.

FIG. 5 shows a control flow of the sound field effect mode setting control by the microcomputer 108. When the switching operation of the input source in the input source selecting operation means 34 is detected (P1), the current (immediately before switching) sound field effect mode of the input source before the switching operation is the sound field effect mode storage means 1.
No. 04 is stored (P2). Then, the input selector 30
Is switched to the input source after the switching operation (P3). Further, the sound field effect mode stored in the sound field effect mode storage means 104 is read from the input source after the switching operation, and the sound field effect processor 42 is set to the sound field effect mode (P4). . In this way, each time the input source is switched, it is automatically set to the last applied sound field mode for that input source.

After the automatic setting, if the sound field effect mode is desired to be changed, the desired sound field effect mode can be selected by the sound field effect mode setting operation means 35 (P5). P6). If the input source is switched to another input source after the change, the sound field effect mode immediately before switching becomes a new sound field effect mode for the input source before switching, and the stored contents of the sound field effect mode storage means 104 are rewritten.

FIG. 6 shows an actual operation example according to the control flow of FIG. Here, it is assumed that the input sources are A, B, C, D and the sound field effect modes are 1, 2, 3, 4, ...
First, the stored contents of the sound field effect mode storage means 104 are as follows: input source A is mode 3, input source B is mode 4, input source C is mode 1, and input source D is mode 3.
It was. When the input source is switched to A, the storage mode 3 for the input source A is read and the sound field effect processor 42 is automatically set to the sound field mode 3 to reproduce the input source A.

If it is desired to switch to the mode 1 while the input source A is being reproduced, the sound field effect processor 42 switches to the mode 1 by indicating the mode 1 by the sound field effect mode setting operation means 35. To be

After that, when the reproduction of the input source A is completed and the input source selection is switched to the input source B, the storage of the input source A in the sound field effect mode storage means 104 is switched from the mode 3 to the mode 1. In addition, the mode 4 stored for the input source B is read out,
The sound field effect processor 42 is automatically set to mode 4,
The input source B is reproduced.

[0026]

[Modification] In the above embodiment, even if the sound field effect mode is changed by the sound field effect mode setting operation means 35, the sound field effect mode storage means 104 is not immediately rewritten, but is switched to another input mode. Although it is rewritten for the first time, it is also possible to rewrite the stored contents of the sound field effect mode storage means 104 for the corresponding input source every time the sound field effect mode is changed by the sound field effect mode setting operation means 35.

[0027]

As described above, according to the present invention, the sound field effect mode applied immediately before switching to another input source is stored for each input source, and the input source is restored. When this happens, the corresponding sound field effect mode is read out and automatically set to that sound field effect mode, so there is no need to reset the sound field effect mode each time the input source is switched, and the operation is easy. Become. Moreover, since the sound field effect modes can be switched independently, the sound field effect modes can be automatically set in accordance with the input source switching and then changed according to preference.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional device.

FIG. 3 is a block diagram showing a specific example of the sound field effect processor 52 shown in FIGS.

FIG. 4 is a diagram showing an example of reflected sound parameters stored in a ROM 92 of FIG.

5 is a control flow of sound field effect mode switching control by the microcomputer 108 of FIG. 1. FIG.

FIG. 6 is a time chart showing an actual operation example according to the control flow of FIG.

[Explanation of Codes] 10, 12, 14 Source Equipment 16, 18, 20 Source Signal 22, 24, 26 Source Input Terminal 30 Input Selector 34 Input Source Selection Operating Means 35 Sound Field Effect Mode Setting Operating Means 42 Sound Field Effect Sound Signal Generation means 68 Sound field control device 70 Sound field effect mode switching control means 104 Sound field effect mode storage means 106 Memory control means

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04S 1/00 D 8421-5H

Claims (1)

[Claims] 1. A plurality of source input terminals for respectively inputting source signals output from a plurality of source devices, an input source selecting operation means for selecting an input source, and a plurality of input terminals for inputting from each of the input terminals. An input selector for inputting a source signal and selectively outputting the source signal selected and operated by the input source selecting operation means, and a sound field effect for generating a sound field effect sound signal of the source signal output from the input selector. Sound signal generation means, sound field effect mode setting operation means for setting and operating a sound field effect mode to be generated by the sound field effect sound signal generation means, and the sound field effect mode to be applied for each input source And a sound field effect mode storing means for respectively storing the input sound source and the sound field effect mode storing means. The sound field effect mode setting operation means is operated by the memory control means for storing the sound field effect mode applied immediately before switching to the sound source effect mode and the sound field effect mode of the sound field effect sound signal generation means. When the input source selection operation means is operated, a sound for switching to the sound field effect mode stored in the sound field effect mode storage means for the corresponding input source. A sound field control device comprising field effect mode switching control means.