JP2505589Y2 - Sound field configuration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Overview In recent years, for example, in a passenger compartment of a vehicle, a sound field forming apparatus that reproduces a sound field in a desired space at a listening position has become popular. The space in which the sound field is simulated can be set in a plurality of types such as a concert hall and a live house, and the listener can reproduce the stereo sound to be reproduced with respect to the reference sound field of the space selected from the plurality of types. Adjust the constant based on the signal to construct the desired sound field. In this way, constants for the sound field according to the listener's preference are set for each sound source such as each cassette tape and compact disc, and for each of multiple types of spaces, and are registered individually in multiple areas of the memory provided in advance. To be done. When there are a plurality of stored sound fields, it is very complicated to select a desired sound field when changing the sound source, for example.

Therefore, in the present invention, when the scan switch is operated, the registered sound fields are sequentially arranged, for example, every 10 seconds along a predetermined order. So-called skip reproduction is executed. Further, the listener can reverse the order of the sound fields to be switched by operating the reverse switch during the skip reproduction.
In this way, it is possible to switch the reproduction order of the sound fields to be skip-reproduced and search for a desired sound field in a short time. When the desired sound field is formed, by operating the scan switch again, the skip reproduction is stopped, and thereafter, the stereo sound signal is reproduced by the selected sound field. In this way, the operation of selecting a desired sound field is simplified, can be executed in a shorter period of time, and operability can be improved.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound field forming device that forms a desired sound field in, for example, a passenger compartment of a passenger car, and more particularly, to a selecting operation for selecting a desired sound field from a plurality of sound fields.

2. Description of the Related Art In recent years, in audio equipment, for example, a sound field configuration device has become widespread in order to perceive a unique sound field in a performance hall or the like. In the sound field configuration device, for example, a reverberation sound, an initial reflection sound, and an additional acoustic signal such as a 3D bass sound are added to a stereo acoustic signal output from an acoustic signal generation source such as a cassette tape recorder or a compact disc reproducing device. By generating and adding and reproducing, a sound field that simulates a desired space is configured and reproduced at the listening position. The sound field is adjusted by adjusting the reverberation time, the initial delay time, and each level of the incidental acoustic signal (collectively referred to as “constant”), for example, a concert hall, a live house, You can simulate the space of a church and even a stadium.

A constant serving as a reference for each of these sound fields is stored in advance in memory as a constant corresponding to the reference sound field.
So, for example, if you operate the sound field switching switch EFC,
A constant corresponding to the reference sound field is selected and read out, and a corresponding reference sound field is formed by the acoustic signal generated and output from the stereo acoustic signal according to the constant. The listener can also adjust each constant with respect to the configured reference sound field, and thus an adjusted sound field adjusted according to preference is configured.

As mentioned above, the constant depending on the adjusted sound field is
By operating a predetermined memory operation switch, each is individually stored in the selected store area of the random access memory. When changing a sound source such as a cassette tape or a compact disc or a song to be played, the listener selects a desired sound field from a plurality of adjusted sound fields that have been generated and stored before, depending on the sound source. And configure.

[Problems to be Solved by the Invention] Conventionally, when a listener selects a desired adjusted sound field, each stored sound field is individually selected by operating the memory operation switch for a proper time. The desired sound field is finally selected after the sound fields to be sequentially configured are switched by operating the memory operation switch in this manner and the comparative listening is performed.

However, recently, there is a tendency that a large number of store areas for storing the sound field adjusted as described above are provided in advance. For example, if four types of adjusted sound fields can be individually stored in four types of simulatable spaces such as the concert hall, 16 memory storage regions are required.

Therefore, when the listener selects his or her favorite sound field according to the change of the sound source, there are cases in which the memory operation switch has to be operated ten times or more in the above-described comparative listening. , Time is spent on the selection operation, and the operation is very complicated.

Therefore, an object of the present invention is to provide a sound field configuration device that can select a desired sound field from a plurality of sound fields in a short time by an easy operation.

Means for Solving the Problems The present invention has a memory having a plurality of areas for storing constants for constituting a plurality of mutually different sound fields in association with a basic sound field that is a basis for each sound field, A sound field configuration calculation circuit for calculating and outputting an acoustic signal forming a sound field from an input acoustic signal in response to a constant read from the memory; and a first field operated for comparison and selection with the sound field. And the second
In response to the operation of the comparison switch and the first comparison switch, a sound field having the same basic sound field is sequentially reproduced from a predetermined area along a predetermined reading direction so that the same sound field is sequentially reproduced. Each time, the constants are switched and read out and given to the sound field configuration arithmetic circuit, and in response to the operation of the second comparison switch,
Skip reproduction processing means for stopping the switching of the constants and continuing to supply the constants at the time of stop to the sound field configuration arithmetic circuit; and an inversion switch operated for reversing the reading direction for switching and reading the constants. When the constants are switched and read by the skip reproducing device processing means, in response to the operation of the reverse switch, the constants read from the area where the constants read at the time of the operation of the reverse switch are stored, And a reversal control means for controlling the skip reproduction processing means so as to reverse the reading direction to be read out.

According to the sound field construction apparatus of the present invention, when the operation of the first comparison switch is executed to compare the sound fields, the skip reproduction processing means sequentially from the predetermined area of the memory along the predetermined reading direction. Constant and at fixed time intervals, constants for configuring the sound field stored in the memory in association with the basic sound field are switched and read so that the same sound field is sequentially reproduced. It is given to the sound field composition calculation circuit. In the sound field configuration calculation circuit, in response to the sequentially given constants, the acoustic signals that form the sound field are sequentially switched from the input acoustic signal, calculated, and output. The listener thus comparatively listens to the sound field formed by switching at the constant time intervals. When the reversing switch is operated during the reproduction of switching the sound field, the reversing control means controls the skip reproduction processing means so that the reading direction in which the constant is read out is reversed. Therefore, even when there are a plurality of sound fields to be switched and configured, the desired sound field can be searched for in a short time by the reversing operation of the reading direction.

Further, it is necessary to invert the sound field by starting the constant reading from the area of the memory which continues along the reading direction in which the current is inverted immediately before the fixed time has elapsed at the time of operating the inversion switch. The waiting time is shortened and the sound field can be searched in a shorter period.

When the desired sound field is formed, the operation of the second comparison switch is executed. In response to the operation of the second comparison switch, the skip reproduction processing means stops the switching of the constants, and subsequently forms the sound field formed when the switching is stopped. Therefore, a desired sound field can be comparatively listened to and selected from a plurality of sound fields only by an easy operation by operating the first and second comparison switches, and the operability is significantly improved.

Embodiment FIG. 1 is a block diagram showing a simplified electrical configuration of a sound field configuration device 1 according to an embodiment of the present invention. The configuration of the sound field configuration device 1 will be described with reference to FIG.

Cassette tape recorder, compact disk (abbreviation)
A stereo audio signal for the right channel and a left channel are output from the left and right signal generating circuits 2a and 2b of the audio signal generating source 2 such as a CD) reproducing device and a digital audio tape recorder (abbreviated as DAT). Each stereo acoustic signal is individually converted into a digital signal via the analog / digital converters 3a and 3b, and input to a digital signal processor (hereinafter, referred to as a processor) 4.

The processor 4 is a sound field configuration calculation circuit that performs calculation processing such as multiplication and addition on the input stereo sound signal and outputs a sound signal for forming a sound field described later. That is, an incidental acoustic signal such as a reverberant sound, an initial reflected sound, and a 3D low tone is generated from the input stereo acoustic signal, and is added to the stereo acoustic signal and output.
The processor 4 is connected to a processing circuit 6 composed of, for example, a microcomputer, and further provided with an operation switch group 7 and a display 8 composed of a liquid crystal display or the like in connection with the processing circuit 6. I have.

The processing circuit 6 includes a skip reproduction processing means and a reflection control means, and based on an input operation from an operation switch group 7 described later, a reverberation time, an initial delay time, and further the incidental sound with respect to the incidental sound signal. The constant F including each level of the signal is adjusted and set. The acoustic signal added with the incidental acoustic signal adjusted in this way is passed through the corresponding digital / analog converters 5a to 5d, respectively, and the front left speaker FL, the front right speaker FR, and the rear right speaker FR are provided in the vehicle compartment. The sound is reproduced from the left speaker RL and the rear right speaker RR. For example, the front left and right speakers FL and FR are respectively provided near the left and right ends of an instrument panel on which various instruments and the like are arranged, and at the left and right doors. The rear left and right speakers RL and ER are arranged on the rear tray. In this way, the acoustic signal from each speaker brings a sound image to the listening position in the vehicle interior, and a sound field having a "realistic feeling" or a "expansive feeling" is configured.

In the processing circuit 6, a read-on memory (hereinafter referred to as "RO
M) 9 and a random access memory (hereinafter “R”).
AM ”). The ROM 9 is divided into, for example, four store areas 9a to 9d, and each area has a constant F as a reference for a sound field constituted by a selected space.
, Are individually stored as constants according to the reference sound field T. The space is, for example, a concert hall, a live house, a church, or a stadium.

The RAM 10 stores a plurality of (four areas in this embodiment) sub memories ma to md for storing a constant F corresponding to a sound field to be determined after adjustment, and unique information corresponding to the sound field currently being reproduced. It includes sub memories M1 to M3 for storing. The fortune memories ma to md are respectively assigned corresponding to the spaces to be simulated in the ROM 9. That is, the same subscripts a to a in the store areas 9a to 9d and the sub memories ma to md in the ROM 9 are used.
The store areas marked with d correspond to each other.
Furthermore, each sub memory ma to md is divided into four store areas. That is, the sub memory ma has store areas ma1 to ma4, and the other sub memories mb to md are also the same. Therefore, the total number of store areas divided in the sub memory is 16 areas.

The sub memory M1 is an area for storing a memory number indicating a storage area of each of the memories 9 and 10 utilized for exchanging information with sub memories M2 and M3 described later. In addition,
In this embodiment, the memory numbers individually assigned to the respective store areas are shown in Table 1.

The sub memory M2 is an area in which the constant F currently set in the processor 4 is stored. That is, based on the constant F stored in the sub memory M2, an acoustic signal to which the incidental acoustic signal is added is generated and output from the speaker to form a sound field. Further, the sub memory M3 stores a mode counter value C determined corresponding to the reference sound field T in any space of the ROM 9 currently being read. The mode counter value C is, for example,
The concert hall, live house, church, and stadium stored in ROM9 correspond to 1 to 4 in that order.

FIG. 2 shows the contents stored in the store area ma1 of the sub memory ma. The store area ma1 is further divided into a plurality of sub-store areas. For example, the constant F is stored in the first sub-store area m01. Also, the second secondary store area m0
In 2, the mode counter value C is stored. Therefore, the first sub-store area m01 is located between the sub-memory M2 and the second sub-store area m02.
Transfer to and from each other. In the sub memory ma, the other store areas ma2 to ma4 are similarly configured.

Further, the sub memories mb to md are also configured similarly to the sub memory ma. Therefore, the constant F corresponding to the sound field generated by being adjusted from the reference sound field T selected in the ROM 9 is stored in the sub memory provided corresponding to each of the reference sound fields, and the same reference sound field T is further stored. Up to 4 types of sound fields adjusted from can be stored. In this way, information indicating which reference sound field T in the ROM 9 and how much is adjusted is stored in each of the store areas ma1 to md4. When the mode counter value C is associated with the sub memories ma to md together with the space to be simulated in the ROM, the mode counter value C need not be stored in each store area.

The operation switch group 7 includes operation switches S1 to 5 for each function.
The operation switch S5 is grouped. First operation switch
The sound field switching switch EFC, which is S1, reads the constant F corresponding to the reference sound field T of the ROM 9 into the sub memory M2. Further, every time the sound field switching switch EFC is operated, the reference sound field T to be read is switched in the store order in the ROM 9 along the cycle. For example, in this embodiment, the concert hall, the live house, the church, the stadium, and the concert hall are sequentially switched for each operation.

The constant adjustment switch, which is the second operation switch S2, is divided into a time mode and a level mode. When adjusting the reverberation time and the initial delay time with the constant F,
One of the times is selected by operating the time selection switch TIME, and the selected time stored in the sub memory M2 is adjusted by the time extension switch + and the time reduction switch −. When adjusting each level of the reverberation sound, the early reflection sound, and the bass sound for 3D, a switch (not shown) having a similar configuration is operated to selectively adjust each level stored in the sub memory M2. . By operating these constant adjustment switches, the constant F
The sound field formed by adjusting the is called an adjusted sound field Y.

When it is desired to determine and store the adjusted sound field Y, the memory operation switches Sm1 to Sm4, which are the third operation switches S3, are operated. Each memory operation switch Sm1 to Sm4 is 1 to 4
Store areas of the sub memory ma to which subscripts with the same numerical value of are added
Supports ma1 to ma4 individually. Similarly, the memory operation switches Sm1 to Sm4 individually correspond to the store areas mb1 to mb4 of the sub memory mb, the store areas mc1 to mc4 of the sub memory mc, and the store areas md1 to md4 of the sub memory md.

When any one of the memory operation switches Sm1 to Sm4 is operated, first, one of the sub memories ma to md is selected according to the mode counter value C of the sub memory M3, and the one operated in the selected sub memory. The store area corresponding to the memory operation switch is selected, and thus the read / write of the stored contents is executed between the store area and the sub memories M2 and M3. The read / write is selected, for example, according to the operation time of the memory operation switch, and when the pressing operation is, for example, less than 1, 5 seconds, the corresponding store contents are read from the corresponding store area to the sub memories M2, M3. On the other hand, when the pressing operation is performed for 1,5 seconds or more, the stored contents are written from the sub memories M2 and M3 to the corresponding store areas.

The fourth operation switch S4, Sukiyan switch SCAN,
It is operated when reading a constant corresponding to a desired sound field from the plurality of store areas. In this embodiment, the scan switch SCAN is the first and second comparison switches. When the first pressing operation of the scan switch SCAM is executed, the stored contents are sequentially switched at predetermined skip times W, for example, from a store area having a small memory number to a store area having a large memory number.
Read to M2 and M3. In this way, the processor 4 calculates an acoustic signal in accordance with the stored contents read into the sub memories M2 and M3, the sound fields corresponding to the respective store areas are sequentially constructed, and so-called skip reproduction is executed. The store area in which the reading is started in the skip reproduction may be, for example, the store area in which the reference sound field T is stored, and the store area in the adjusted sound field Y configured by adjusting the constant F. May be

When the listener listens to a desired sound field during the skip reproduction, the scan switch SCAM is pressed again. In response to the operation, the skip reproduction is stopped, that is, the switching of the stored contents of the sub memories M2 and M3 is stopped. Thus, the sub memory M during the above operation
Based on the contents of the M2 store, the sound field will continue to be constructed. The predetermined skip time W is, for example, 10
Seconds, and is chosen by the listener at an appropriate time for comparative listening to each sound field.

The inversion switch, which is the fifth operation switch, is operated when reversing the reading direction of the store area to be read by switching the constant F corresponding to the sound field for each skip time W during the skip reproduction. The reversal of the reading direction corresponds to, for example, reversing from the direction from the smallest number to the largest number in the order of the graduation number of the store area in which the constant F is read from the direction from the largest number to the smallest number.

By the way, for example, as in the present embodiment, the total number of storage areas in which the constant F is stored is 20 areas (9a to 9d, ma1 to md4).
In the case where the skip reproduction is executed along a constant reading direction over all the store areas, in order to hear the reproduced sound field again, in all the store areas, After skip playback over the sound field has passed, one must wait until the next round of playback along the cycle. For example, in the configuration of the store area in this embodiment, the waiting time is 20
It requires 0 seconds (W x 20, W = 10 seconds).

Considering the above point of view, in the present embodiment, since the reversing switch is provided and the reading direction can be easily reversed, it is possible to quickly return to the sound field that has been reproduced during the skip reproduction and listen again. You can Also,
In the skip reproduction that is executed along the cycle, that is, in a circulating manner, the sound field switching along the other reading direction that is reversed is smaller than the sound field switching along the other reading direction. In some cases, a desired sound field can be searched. For example, as an example, there is a case where the sound field in the store area of the memory number "1" transits to the sound field in the store area of the memory number "20" by skip reproduction. In the above case, the reversal of the reading direction is very effective. is there.

In the configuration of the embodiment shown in FIG. 1, the reversing switch is constituted by a time extension switch + and a time reduction switch-. The time extension switch + and the time reduction switch − are constant adjustment switches as described above, and the constant adjustment function is executed when the skip reproduction processing is not executed. That is, while the skip reproduction is being executed, if the time extension switch + is operated, the skip reproduction is executed along one reading direction, for example, in the direction from the smallest memory number to the largest number, and the time shortening switch − is activated. When operated, the skip reproduction is executed along the other reversed reading direction, for example, in the direction from the largest memory number to the smallest number.

The sound field is switched when the reversing switch is operated by switching the sound field along the reversing reading direction after a lapse of a skip time W measured with respect to the sound field formed at the time of operating the reversing switch. Alternatively, the sound field may be switched along the reading direction in which the sound field is immediately reversed without elapse of the skip time W during the reverse switch operation. With the configuration in which the skip reproduction is immediately reversed together with the operation of the reverse switch, the waiting time until the sound field is reversed, that is, the remaining skip time W is not spent, so that more rapid skip reproduction can be realized and desired in a short time. The sound field of can be searched.

Furthermore, regarding the time extension switch + and the time reduction switch − which are the reversing switches in this embodiment,
By having a configuration in which the sound field is switched immediately along the instructed reading direction at the time of each switch operation,
By operating a switch that indicates the same direction as the reading direction in which the skip reproduction is executed, reproduction is performed along the reading direction without passing the skip time W for each sound field, that is, fast-forward reproduction. can do. For example, if the time extension switch + is operated during skip playback along the direction from the smallest memory number to the largest memory number, the sound field immediately follows,
In this way, fast-forward reproduction can be performed one after another for each operation.

Thus, according to the present embodiment, there are a plurality of sound fields that can be configured by the sound field configuration device 1 including the reference sound field T and the adjusted sound field Y, that is, the constant F corresponding to the plurality of sound fields is the store area. Even if it is stored in, the listener can easily select and listen to a desired sound field by simply operating the scan switch SCAN twice. Further, the reading order of the sound field that is switched and reproduced by the operation of the reversing switch can be reversed, and the desired sound field can be searched for in a shorter time. Therefore,
Even if you want to change the sound field such as a compact tape or a music piece to be played and you want to switch the sound field immediately, you can select the sound field with a short and easy operation and the operability is greatly improved. To do.

The processing circuit 6 according to the operation of these operation switch groups 7.
The processing state of is displayed on the display 8.

The processing corresponding to each operation switch will be described below with reference to the flow chart.

FIG. 3 is a flow chart for explaining the discrimination operation of the input operation from the operation switch group 7 in the processing circuit 6. In the processing circuit 6, in step a1, an initialization process such as clearing the contents stored in the RAM is performed, and in step a2, the input state of the operation switch is determined in accordance with a sampling cycle determined in advance for the determination of timer overflow. When the timer overflow has elapsed, it is determined whether or not one of the operation switches has been operated in steps a3 and a4.

If neither operation switch is operated, the process proceeds to step a5. On the other hand, in the step a4,
If it is determined that any one of the operation switches has been operated, the process proceeds to step a6, the process corresponding to each operation switch described later is performed, and the process proceeds to step a5. At step a5, a program for skip reproduction processing, which will be described later, is started, and processing according to the operation judgment of the scan switch SCAN is executed.

After step a5, the process proceeds to step a7,
The processing state of the processing circuit 6 at that time is displayed and edited using the display 8 and output. After that, the process proceeds to step a2.
Then, the above-mentioned processing is repeated and the input of the operation switch is judged again.

FIG. 4 shows the sound field switching process based on the operation of the sound field selection switch EFC of this embodiment. When it is determined in the input determination of the operation switch that the sound field changeover switch EFC is operated, the process proceeds according to the program shown in FIG.

When the sound field changeover switch EFC is operated, at step b1, the mode counter value C stored in the sub memory M3 is incremented by +1 and at step b2 it is determined whether or not the mode counter value C is "5". Is judged.
If the mode counter value C is "1" to "4", the process proceeds to step b4, while if it is "5", the process is returned to "1" at step b3, and the process proceeds to step b4. .

In steps b4 to b10, R is set according to the mode counter value C.
The constant F of the corresponding reference sound field T is read from the OM9 to the sub memory M2, and the sound field construction device 1 forms a sound field based on the constant F. That is, when the mode counter value C is "1", the reference sound field T of the concert hall is formed, when the mode counter value C is "2", the reference sound field T of the live house is formed, and the mode counter value C is "3". , The church reference sound field T is formed, and when the mode counter value C is “4”, the stadium reference sound field T is formed. In this way, each time the sound field switching switch EFC is operated, the constant corresponding to the subsequent reference sound field along the cycle is read, and the reference sound field T is constructed based on the constant F. At step b11, the mode counter value C is set to "1.
The value obtained by adding "6" is stored as a memory number in the sub memory M1.

FIG. 5 shows the flag processing based on the operation of the scan switch SCAN. Step a4 shown in FIG.
When the input operation of the scan switch SCAN is determined, the process executes the program shown in FIG. 5 in step a6.

At step d1, it is judged whether or not the skip reproduction is being executed. The judgment is made, for example, by a skian flag Fs indicating that the set state is skip reproduction. If the judgment is affirmative, it is judged that the scanning switch SCAN is the second operation, the processing advances to step d2, the scanning flag Fs is set to the reset state, and the sound is reproduced during the skip reproduction at step d3. The 10-second timekeeping (skipping time W timekeeping) by the timekeeping counter, which has been timed each time the field is switched, is stopped and the process proceeds to the subsequent processing.

If the determination in step d1 is negative, it is determined that the scan switch SCAN is the first operation, and the process proceeds to step d4 to skip scan flag Fs.
To the set state and proceed to step d5. Step d5
Then, the predetermined increment flag Fi is set to the set state. The set state of the increment flag Fi indicates that, in the skip reproduction, the memory number of the store area in which the constant F is read is sequentially incremented in the reading direction.

Therefore, the reset state means that the reading direction is reversed and the memory numbers are sequentially decremented. After passing through the step d5, the process proceeds to the subsequent process.

FIG. 6 shows a program for the skip reproduction processing shown in step a5 of FIG. At step e1, it is determined whether the skip reproduction is in progress or not.
It is judged by. If the judgment is negative, it is judged that the skip reproduction is not executed, or the skip reproduction is finished and the desired sound field is selected.
The process proceeds to the subsequent processes.

If the determination in step e1 is affirmative, the process proceeds to step e2, and it is determined whether or not the time measurement of 10 seconds for each sound field switching is completed. If the determination is negative, the process proceeds to another process, and if the determination is affirmative, the process proceeds to step.
Go to e3. At step e3, since the time measurement for 10 seconds has ended, the current reading direction is subsequently judged by the increment flag Fi in order to switch the sound field to be constructed.

That is, if the increment flag Fi is in the set state, the process proceeds to step e4, increments the memory number of the sub memory M1, and determines whether the incremented memory number is "21" in step e5. Is determined. If the memory number is "1" to "20", the process proceeds to step e7, while if it is "2", the process is returned to "1" at step e6, and the process proceeds to step e7. If the increment flag Fi is reset in step e3, the process proceeds to step
The process proceeds to e8, in which the memory number of the sub memory M1 is decremented, and it is determined in step e9 whether or not the decremented memory number is "0". If the memory number is "1" to "20", the process proceeds to step e7,
On the other hand, if it is "0", it is returned to "20" at step e10, and the process proceeds to step e7. That is, the reason for updating the memory number is that the memory number corresponds to each store area as shown in Table 1 above and is only "1" to "20", and skip reproduction continues along the cycle. .

At step e7, the stored contents such as the constant F are read from the store area corresponding to the memory number of the sub memory M1 to the sub memories M2 and M3, the construction of the sound field is started based on the constant F, and at step e11. The 10-second timekeeping is started.
In step e12, for example, a beef sound is output for 50 milliseconds to make the listener perceive the start of a new sound field construction,
You may hear the "pits" sound. Then, the process proceeds to the subsequent processes.

In this way, in response to the first operation of the scan switch SCAN, the stored sound field is skip-played along the selected reading direction, and in response to the second operation of the scan switch SCAN, the desired sound is reproduced. The place is selected. Therefore, the selection operation when a plurality of sound fields are registered can be performed by an easy operation.

7 to 9 show processing operations based on the operation of the constant adjustment switch.

The constant F is adjusted by operating the selecting operation switch for selecting the time or level as described above, and then operating the adjusting operation switch.

FIG. 7 shows the time selection processing when the time selection switch TIME is operated. The time selection switch TIME
Therefore, one of the reverberation time and the initial delay time is selected. When the time selection switch TIME is operated,
At step h1, it is judged whether or not the time currently selected is the reverberation time based on the reverberation flag determined in advance. If the reverberation flag is in the set state, the reverberation time has been selected.
At h2, the reverberation flag is reset and the initial delay time is selected. On the other hand, if the reverberation flag is in the reset state at step h1, by contrast, the process proceeds to step h3,
The reverberation flag is set to the set state, and the reverberation time is selected. The selection status of the selected reverberation time and the initial delay time is displayed on the display 8.

FIG. 8 shows a time extension process based on the operation of the time extension switch +. When the input operation of the time extension switch + is judged by the judgment of the input operation, the step
At 11, it is judged based on the skim flag Fs whether or not the skip reproduction is being executed. If the determination is affirmative, the time extension switch + does not function as a constant adjustment switch, and it is determined to be an operation for setting the reading direction in skip reproduction. Therefore, the process proceeds to step i2 to set the increment flag Fi to the set state and set the reading direction in which the memory number order of the store area in which the constants are read in the currently executed skip reproduction is sequentially incremented. After the setting, the process proceeds to step i3 to stop the skip time W of 10 seconds, and forcibly end the time. That is, it indicates that the switching is immediately switched to a new sound field that continues along the read direction set in the skip reproduction. After that, the process proceeds to another process.

On the other hand, if it is determined in step i1 that skip reproduction is not being executed, the process proceeds to step i4 to determine whether the time selected by the time selection switch TIME is the reverberation time. It If the determination is positive based on the reverberation flag or the like, the process proceeds to step i5 to set the reverberation time one step larger. If it is determined that the time selected in step i4 is the initial delay time, the process proceeds to step i6 to increase the initial delay time by one step. Thus, the constant of the selected time is set to be larger by one step by the operation of the time extension switch + when the skip reproduction is not being executed.

FIG. 9 shows a time reduction process based on the operation of the time reduction switch. Note that FIG. 9 is similar to FIG. 8, and corresponding parts are designated by the same reference numerals. That is, the same processing operation as the time extension switch + is performed for the time reduction switch-, and if it is operated during the skip reproduction, it does not function as a constant adjustment switch, and the increment flag Fi is set at step i2a. The reset state is set, and the reading direction in the skip reproduction is set to the direction in which the memory numbers are sequentially decremented. Also, in the operation when the skip reproduction is not being executed, the selected time is set to be smaller by one step, as indicated by steps i5a and i6a.

Further, although the above description has been made in relation to the constant adjustment switch in the time mode, in the level mode as well, the processing operation is similar to that shown in FIGS. 7 to 9, and the reverberation sound, the early reflection sound, or the 3D sound is generated. Adjust the level up / down of the selected sound level for any of the bass. In this embodiment, the processing in the level mode does not include the flag processing relating to the skip reproduction of steps i1 to i3 shown in FIGS. 8 and 9.

FIG. 10 shows the registration processing based on the operation of the memory operation switches Sm1 to Sm4. Here, it is assumed that the memory operation switch Sm1 is operated. The memory operation switch is judged by the input judgment of the operation switch shown in FIG.
When the input operation of Sm1 is determined, it is determined in step f1 of FIG. 10 whether or not the input operation of the memory operation switch Sm1 is the first time. If the judgment is affirmative, the process proceeds to step f2 to activate a clock counter for clocking, for example, 1.5 seconds, and then again proceeds according to the program shown in FIG.

After that, when the input operation of the memory operation switch Sm1 is determined again, the process proceeds from step f1 to step f3,
It is determined whether or not the time for the above 1.5 seconds has ended. If the determination is negative, the process repeats the program of FIG. 3, step f1, and step f3, and
When the time measurement for 5 seconds ends, the memory operation switch Sm1
Is judged to have been operated for 1.5 seconds or longer, and the process proceeds to step f4. In step f4, the sub-memory mi (i = a ...) is first read according to the mode counter value C stored in the sub-memory M3.
d) is selected, and information such as a constant F corresponding to the sound field currently configured is transferred from the sub memories M2 and M3 to the stroke area mi1 corresponding to the memory operation switch Sm1 in the selected sub memory and stored. The registration process ends.

Further, FIG. 11 shows a reading process based on the operation of the memory operation switch Sm1. When the input operation of the memory operation switch Sm1 is completed while the program of FIG. 3 and steps f1 and f3 of FIG. 10 are repeated, the time measured by the time counter is 1.5 seconds at step g1 of FIG. It is judged to be less than. Therefore, it is judged that the memory operation switch Sm1 is operated in less than 1.5 seconds, and in step g2, the sound field switching switch EFC is operated to operate according to the mode counter value C set in the sub memory M3. A store area mi1 is selected, and a constant F is transferred from the selected store area mi1 to the sub memories M2 and M3.
And the like, the constant F is transferred to the processor 4 to form a corresponding sound field, and the reading process is completed. The processing operation for the memory operation switch Sm1 shown in FIG. 10 and FIG. 11 is the same as the other memory operation switch Sm1.
Similarly, in m2 to Sm4, the corresponding store area is executed.

FIG. 12 is a diagram showing the relationship of the sound field transition based on the operation of the scan switch SCAN and the reverse switch in the present embodiment. The timing at which the scan switch SCAN is operated is shown in FIG. 12 (1), the timing at which the time-reducing switch, which is an inversion switch, is operated in FIG. 12 (2), and that in FIG. 12 (3). The timing at which the time extension switch +, which is a reverse switch, is operated is shown in Fig. 12 (4).
Shows the transitional sound field.

It is assumed that the sound field is currently constructed based on the constant F stored in the store area of the memory number "1". At time t1, when the scan switch SCAN is operated, skip reproduction is started, and the sound field based on the memory number “2”, the sound field based on the memory number “3”, ... Sequentially at each skip time W. The sound field is constructed by switching. The listener listens to the sound field and operates the scan switch SCAN again at a desired sound field, for example, at time t2 when the sound field based on the memory number "4" in FIG. 12 (1) is formed. In this way, the skip reproduction is stopped, and thereafter the sound field based on the memory number "4" is constructed.

After that, when the scan switch SCAN is operated at time t3 when the listener desires to switch the sound field again according to the change of the sound source, for example, the sound field of the memory number "5" following the memory number "4" is Skip playback starts from. For example, when the time reduction switch is operated at time t4 when the sound field based on the memory number "6" is formed, the reading direction for skip reproduction is reversed, and thereafter, the sound field and memory based on the memory number "5" are stored. In contrast to the sound field based on the number "4", ... And the above, skip reproduction is executed along the reading direction in which the memory number order is decremented. Note that FIG. 12 shows the configuration in which the sound field is switched after the skip time W has elapsed even after the reversing switch has been operated.

When skip reproduction is performed along the reading direction,
Time t5 after the sound field based on memory number "20" is played back
In the case of requesting the listening of the sound field again, the reading direction is reversed again by operating the time extension switch +, and immediately the skip field is restored to the sound field based on the memory number "20". can do. Thus, when the second operation of the scan switch SCAN is executed at time t6 when the sound field is being reproduced, the sound field is continuously constructed thereafter.

In this way, when a plurality of configurable sound fields are registered, the listener can easily select a desired sound field only by operating the scan switch SCAN twice. Further, the configuration in which the reading direction at the time of skip reproduction is inverted by the inversion switch makes it possible to search for a desired sound field in a short time. Therefore, even if the sound source is changed, the desired sound field can be immediately switched to be configured.

FIG. 13 is a diagram showing the structure of the operation switch group 7a in another embodiment. In FIG. 13, the same or corresponding parts as those of the operation switch group 7 of FIG. 1 are designated by the same reference numerals. It is not limited in the present embodiment that the reversing switch is constituted by the time extension switch + and the time reduction switch −, and for example,
As shown in FIG. 13, the reverse switch REV may be independently provided as the fifth operation switch S5. That is, when the reversal of the reading direction is requested during execution of the skip reproduction, the reading direction in the skip reproduction after the operation is reversed from the reading direction before the operation by pressing the reversing switch REV once. To configure.

FIG. 14 shows a reversing process based on the operation of the reversing switch REV. When the input operation of the reverse switch REV is judged by the input judgment of the operation switch shown in FIG. 3, whether or not the increment flag Fi is in the set state at step k1 in FIG. The reading direction is determined. If the increment flag Fi is in the set state, the process proceeds to step k2 to set the increment flag Fi in the reset state,
The reading direction is reversed from the direction in which the memory number order is incremented to the direction in which the memory number is decremented. On the other hand, if the increment flag Fi is in the set state in step k1, the process proceeds to step k3 to set the increment flag Fi in the set state. That is, the reading direction is reversed from the decrementing direction in the memory number order to the incrementing direction.

When the reading direction is reversed in each of the steps k2 and k3, the process proceeds to step k4, and the step time W is 10
Forcibly stop the second timing and switch to the subsequent sound field. That is, the process shown in FIG. 14 is the same as the process in steps i1 to i3 of FIGS. 8 and 9 when the time extension switch + and the time reduction switch − are configured by the inversion switch. Correspond.

In the present embodiment, the skip reproduction is executed over all the store areas in which the constants according to the sound field are stored, but the skip reproduction is performed only in the store area in which the constants according to the adjusted sound field Y are stored. Regeneration may be performed. Also, even when the skip playback is executed over all the store areas, if the second scan switch SCAN operation is not executed,
A predetermined sound field may be formed by stopping the skip reproduction.

In addition, in this embodiment, the scan scan switch SCAN 2
Although the explanation has been made in connection with the configuration in which the selection operation of the sound field is executed in response to the pressing operation of each time, another switch may be provided, and in addition to this, the skip reproduction during the pressing period of the scan switch SCAN. May be executed, the skip reproduction may be stopped together with the release of the pressing, and the sound field may be selected. Therefore, the pressing is the first operation, and the pressing release is the second operation.

It should be noted that, in the present embodiment, the types of other operation switches constituting the sound field configuration device, the number of store areas, the memory number value corresponding to the store areas, the type of space to be simulated, and the types of constants are limited. Not something.

Advantageous Effects of Invention According to the invention of claim 1, a constant for forming a plurality of mutually different sound fields is registered in a memory in advance in association with a basic sound field for each sound field. In addition, the desired sound field can be comparatively listened to and selected from the plurality of sound fields simply by operating the first and second comparison switches. Further, since the order of the sound fields sequentially switched by the inversion switch can be changed, the desired sound field can be searched from a plurality of sound fields in a short time.

Especially in the present invention, the constant stored in the memory is
As described above, it is stored in association with the basic volume,
In response to the operation of the first comparison switch, sound fields having the same basic sound field are sequentially reproduced. Therefore, the operability is remarkably improved.

Further, according to the present invention, in the sound field construction device of the present invention, different sound fields are sequentially reproduced, and in that order, as described above, the basic sound field continuously reproduces the same sound field, and then the inverted sound field is inverted. Because it is possible, the subtle differences in the sound fields can be compared many times.

[Brief description of drawings]

FIG. 1 is a block diagram showing a simplified electrical structure of a sound field forming apparatus 1 which is an embodiment of the present invention, FIG. 2 is a view showing stored contents of a store area ma1, and FIG. 3 is a processing circuit 6 4 is a flow chart for explaining the discrimination processing of the input operation from the operation switch group 7 in FIG. 4, FIG. 4 is a flow chart for explaining the sound field switching processing based on the operation of the sound field switching switch EFC, and FIG. A flow chart for explaining the flag processing based on the operation of the switch SCAN, FIG. 6 is a flow chart for explaining the skip reproduction processing based on the operation of the scan switch SCAN, and FIG. 7 is based on the operation of the time selection switch TIME. A flow chart for explaining the time selection process, FIG. 8 shows a time extension switch +
FIG. 9 is a flow chart for explaining the time extension processing based on the operation of FIG. 9, FIG. 9 is a flow chart for explaining the time reduction processing based on the operation of the time reduction switch, and FIG. 10 is based on the operation of the memory operation switch SM1. FIG. 11 is a flow chart for explaining the registration process, FIG. 11 is a flow chart for explaining the reading process based on the operation of the memory operation switch Sm1, and FIG. 12 is the scan switch in this embodiment.
FIG. 13 is a diagram showing the relationship between sound field transitions based on the operation of SCAN and reversing switches, and FIG. 13 is a group of operation switches in another embodiment
FIG. 14 shows the configuration of 7a, and FIG. 14 is a flow chart for explaining the reversing process based on the operation of the reversing switch REV. 1 ... Sound field configuration device, 4 ... Digital signal processor, 6 ... Processing circuit, 9 ... Read-only memory (RO
M), 10 ... Random access memory (RAM), F ... Constant, C ... Mode counter value, SCAN ... Scan switch, ma-md ... Sub memory, ma1-md4, 9a-9d ... Store area , M1 to M3 …… Sub memory, T …… Reference sound field, Y ……
Adjusted sound field, W …… Skip time, REV …… Reversal switch, ＋ …… Time extension switch, － …… Time reduction switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04S 5/02 G10K 15/00 M

Claims (1)

(57) [Scope of utility model registration request] 1. A memory having a plurality of areas for storing constants for forming a plurality of mutually different sound fields in association with a basic sound field serving as a basis for each sound field, and read from the memory. A sound field configuration calculation circuit that calculates and outputs an acoustic signal that constitutes a sound field from an input acoustic signal in response to a constant; first and second comparison switches that are operated to compare and select the sound field; In response to the operation of the first comparison switch, the sound field having the same basic sound field is sequentially reproduced, from the predetermined region along the predetermined reading direction, and sequentially at regular time intervals. In response to the operation of the second comparison switch, the constant is switched and read out and given to the sound field configuration calculation circuit.
A skip reproduction processing means for stopping the switching of the constants and continuously supplying the constants at the time of stop to the sound field configuration arithmetic circuit; and an inversion switch operated for reversing the reading direction for switching the constants for reading. When the constants are switched and read by the skip reproducing device processing means, in response to the operation of the reverse switch, the constants read from the area where the constants read at the time of the operation of the reverse switch are stored, And a reversal control means for controlling the skip reproduction processing means so as to reverse the reading direction to be read out.