JP2604215Y2 - Audio equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] When an audio signal is processed using sound field parameters to generate a predetermined sound field, one step of the set value of the sound field parameter adjusted according to the mode of the sound field An audio device in which the automatic change for each sound is started by the sound field parameter change start means, and the change of the set value is stopped by the sound field parameter change stop means to fix the set value; and In each of the audio devices provided with a function of executing the next operation of the set value change start operation by the sound field parameter change start means by any function selection means other than the field parameter change stop means, Is an audio device that sequentially informs the change of the set value as a sound every time the set value of the device changes by one step. Operation by the order of the switch or the like is easier than conventional.

[Industrial applications]

The present invention relates to an audio device for appropriately processing an audio signal and outputting a reproduced sound from a speaker.

More specifically, the present invention provides an audio device having a function of processing various control signals input from function selecting means such as a plurality of switches on the front surface of the device and executing corresponding operations, or It refers to an audio device having a function of appropriately processing an audio signal according to a sound field parameter to generate a predetermined sound field desired by a user, or an audio device having both functions described above.

[Conventional technology]

FIG. 18 is a block diagram showing a first conventional audio device provided with a plurality of function selecting means. Generally, in the audio device, in addition to an audio signal extracted from an analog audio source such as a cassette tape recorder, an audio signal extracted from a digital audio source such as a CD or DAT is also input.
The rest, and is represented only as a representative audio signal S _i from the former analog audio source 8.

In FIG. 18, a microcomputer for controlling the frequency characteristic correcting portion of the equalizer or the like for outputting a desired reproduction signal S _o to correct the frequency characteristic of the audio signal S _i, the operation of the frequency characteristic correcting portion And a signal processing unit 1 having a CPU. Further, function selecting means 2-1 to 2-n such as a plurality of switches are arranged on the front surface of the microcomputer. The CPU processes various control signals input from these function selecting means 2-1 to 2-n, and causes the function selecting means 2-1 to 2-n to execute the corresponding operation. If the user selects the function selecting means 2
If one of -1 to 2-n is selected and operated, a playback sound is output from the speaker 19 via the power amplifier 9 by a normal playback operation of the audio source 8 such as a cassette tape recorder, or the cassette tape is played. A fast-forward operation (hereinafter abbreviated as FF), a rewind operation (hereinafter abbreviated as REW), a traveling stop operation (hereinafter abbreviated as STOP), and the like are performed.

FIG. 19 is a block diagram showing a second conventional audio device having a sound field generating function. Here, A audio signal S _i from the audio source 8 by the A / D converter 18
A digital signal processor (hereinafter abbreviated as DSP) for appropriately processing the digital audio signal obtained by the / D conversion to generate a desired sound field, and the DSP
Is provided with a sound field generation unit 4 having a CPU such as a microcomputer for controlling the operation of this embodiment. The details of the DSP and the like will be described in the section of the embodiment. Further, a sound field mode selecting means 14 such as a switch, a sound field parameter increasing means 24 and a sound field parameter decreasing means 34
Is provided. Here, the sound field mode selection means 14
A sound field mode such as a concert hall or a church is selected.The sound field parameter increasing means 24 and the sound field parameter decreasing means 34 are provided with an initial delay time t as shown in FIG. a plurality of set values (○ mark parts) was increase or decrease respectively in each step selectively sound desired settings in the maximum adjustment range of the sound field parameters, such as _e and reverberation time t _r This is input to the field generation unit 4. However, in FIG. 20, only two types of sound field parameters are shown as representative examples. If the user operates the sound field parameter increasing means 24 and the sound field parameter decreasing means 34 a required number of times, the various sound field parameters in the digital audio signal are adjusted to desired set values by the sound field generating unit 4 respectively. Then, a desired digital reproduction signal is output. The digital reproduction signal _So is converted into an analog reproduction signal S by the D / A converter 28.
After being converted to _o , the speaker 19 via the power amplifier 9
Is input to Further, if a reproduced sound is output from the speaker 19, a sound field desired by the user is finally generated by the reproduced sound, and a desired sound field effect is obtained.

[Problems to be solved by the invention]

As described above, in the first audio device having an audio source such as a cassette tape recorder,
Conventionally, when performing various operations such as REW and STOP, the corresponding function selection means, for example, a switch on the front surface of the apparatus is selected and operated each time. More specifically, as shown in FIG. 21, after visually confirming and operating the position of the switch corresponding to FF or REW, and again operating the switch corresponding to STOP to cancel the FF or REW, It was necessary to check the location visually. For this reason, there arises a problem that the operation of switches and the like becomes complicated.

On the other hand, in the second audio apparatus having a sound field generation function, when adjusting a sound field parameter such as a reverberation time to a desired set value, conventionally, a sound field parameter increasing means and a sound field parameter decreasing means, For example, a desired setting value is selected by operating the switch on the front of the apparatus many times to change the setting value of the sound field parameter for each step. For this reason, as in the case of the first audio device described above, there is a problem that the operation of the switches and the like becomes complicated.

In any case, in the case of an in-vehicle audio device, in any case, the driving operation becomes difficult and a safety problem arises. Further, in the second audio device, since the hand or the like cannot be separated from the front portion of the device until the adjustment is completed, the listening position of the user (driver) tends to deviate from the normal position during the adjustment. Therefore, the sound field effect may be different during and after the adjustment.

The present invention has been made in view of the above problems, and
It is another object of the present invention to provide an audio apparatus in which the operation of switches and the like is simpler than in the past when performing various operations such as REW and sound field parameter adjustment.

[Means for solving the problem]

FIG. 1A is a block diagram showing a configuration example of an audio device as a premise of the present invention. The same components as those described above are denoted by the same reference numerals.

Here, a function conversion unit 3 is provided between the signal processing unit 1 and the plurality of function selection units 2-1 to 2-n in the first audio device. The function conversion unit 3 performs at least one next operation of the operations corresponding to the function selection units 2-1 to 2-n, respectively.
2-n, based on the enable signal EN output from the signal processing unit 1, any one of the function selecting means other than the specific function selecting means specified by the specific function selecting means in 2-n
According to the first embodiment, a function of executing the following operation is added.

FIG. 1B is a block diagram showing the configuration of an audio device on which the first principle of the present invention is based. Here, the sound field generation unit 4 of the second audio device includes a sound field parameter change start unit 5 and a sound field parameter change stop unit 6. The sound field parameter change start means 5 starts automatic change of the set value of the sound field parameter for each step. Further, the sound field parameter change stopping means 6 is for stopping the change of the set value and fixing the set value.

FIG. 1C is a block diagram showing the configuration of an audio device on which the second principle of the present invention is based. Here, the signal processing unit 1 of the first audio device has at least the sound field generation unit 4, and the function selection units 2-1 to 2-n include at least the sound field parameter change start unit 5 and the sound field parameter change unit. It has a stopping means 6. Further, when the specific function selecting means described in the description of FIG. 1A is the sound field parameter change stopping means 6, the function converting means 3
However, any one of the function selecting means 2-1 to 2-n other than the sound field parameter change stopping means 6 executes the next operation of the sound field parameter changing start operation by the sound field parameter changing starting means 5. Features are added.

FIG. 1D is a block diagram showing the first and second principle configurations of the present invention. Here, the first principle
The sound field generation unit 4 in each of the audio devices shown in FIG. 1B and FIG. 1C which is a premise of the second principle is provided with a set value change notifying means 7. However, in this case, a case where the set value change notification means 7 is provided in FIG. 1B is shown as a representative. The set value change notifying means 7 sequentially notifies the change of the set value as a sound every time the set value of the sound field parameter changes by one step.

[Action]

In FIG. 1A, the operation (for example, FF, REW, etc.) by any one of the function selecting means 2-1 to 2-n such as a plurality of switches.
Note that it may be determined that the next operation (e.g., STOP) to be performed by one function selection unit may be performed by one function selection unit. In this case, all the function selection units 2-1 to 2-2
With -n, the following operation is performed to save the trouble of visually confirming switches and the like on the front surface of the apparatus. That is, when there is no room for selection in the next operation, the operation of the switches and the like is simplified so that the user does not need to perform any extra work such as switch selection.

In FIG. 1B, a sound field parameter change start means 5 such as a switch is provided on the front surface of the apparatus, and when the sound field parameter change start means 5 is operated, a set value of a sound field parameter such as a reverberation time is changed by a fixed time unit. Automatically increases or decreases every step. Further, a sound field parameter change stopping means 6 such as a switch is provided, and when the sound field parameter change stopping means 6 is operated, the automatic increase or the automatic decrease of the set value is immediately stopped.
In this case, since the change of the set value is set in advance so as to be performed in fixed time units, the user can easily set the timing of stopping the change of the sound field parameter by operating a switch or the like when adjusting to the desired set value. Can be recognized. Therefore, unlike the related art (FIG. 19), it is not necessary to adjust the sound field parameters by operating the switches and the like many times, so that the operation of the switches and the like becomes easier than before.

In FIG. 1C, the device shown in FIG. 1A is applied to the audio device of FIG. 1B having a sound field generating function. That is, in this case, it is determined that the operation following the sound field parameter change start operation by the sound field parameter change start means 5 is the sound field parameter change stop operation by the sound field parameter change stop means 6. By paying attention, the sound field parameter change stop operation is performed by all the function selecting means 2-1 to 2-n, so that the trouble of visually confirming switches and the like is omitted. Therefore, at the time of the above-described stopping operation, it is not necessary to select a switch or the like as in FIG. 1A, so that the operation of the switch or the like is further simplified than in the case of FIG. 1B.

In FIG. 1D, each time the set value of the sound field parameter increases or decreases by one step, a notification sound such as a beep is generated to notify the user. Therefore, the user
Since the adjustment state of the set value of the sound field parameter can be easily understood from the number of occurrences of the notification sound, the timing of the stop of the change of the sound field parameter can be more easily grasped than in the case of FIGS. Becomes easier.

Thus, in the present invention, when various operations such as FF and REW and sound field parameter adjustment are performed, the operation of the switches and the like becomes simpler than before, and the operability can be improved.

〔Example〕

FIG. 2 is a hardware configuration diagram showing an example of an audio device as a premise of the present invention. However, here, a cassette tape recorder 38 is used as the first audio device.
And tuner 38 ', two audio sources 8
18) illustrates an audio device integrated with a cassette tape recorder / tuner incorporated in one device.

In the second diagram, the signal processing unit 1, an equalizer 11 to correct the frequency characteristic of the audio signal S _i to be taken out from the magnetic head 48 of the cassette tape recorder 38, the signal level of the audio signal S _i to a suitable value A preamplifier 12 that adjusts and outputs a desired reproduction signal S _o , and a microcomputer that controls the operation of the equalizer 11 and the preamplifier 12.
This is realized by the CPU 10. Further, various tuner control signals are sent from the CPU 10 to a tuner 38 ′ control sub CPU 10 ′ which sends an input signal to a deck drive unit 68 comprising a drive circuit for driving a motor and the like of the deck 58 of the cassette tape recorder 38. Or sending in. Further, as shown in FIG. 3, a plurality of function selecting means 2-1 to 2-n include a STOP switch 20-2 for stopping the tape running, an FF switch 20-3 for fast-forwarding the tape, and a tape rewinding unit. RE
W switch 20-4 and one-track repeat start switch 20-1
A plurality of function selection switches 20-1 to 20-n including 2 and the like are arranged on the front surface of the apparatus. These function selection switches
20-1 to 20-n are connected to the CPU 10 and are preset so as to execute, for example, the functions shown in the following table depending on whether the mode is the cassette mode or the tuner mode.

However, a detailed description of each switch function is omitted here. Further, the function selection switch 20-
A display unit 13 such as a liquid crystal device (LCD) for visually displaying the current signal level, frequency characteristics, and the like, together with 1 to 20-n.
It is arranged on the front of the device while connected to PU10.
Further, the function conversion means 3 is realized by the CPU 10.

FIG. 4 is a flowchart for explaining the main operation of the CPU. When the operation of the equalizer 11, the preamplifier 12, the deck 58 of the cassette tape recorder 38, and the like is controlled by the CPU 10, first, all the registers and the RAM in the microcomputer are reset and initialized. Next, the microcomputer 10 operates a built-in timer to read data input from the plurality of function selection switches 20-1 to 20-n into the CPU 10 at regular intervals. Further, the read data is displayed on the display unit 13, and the equalizer 11, the preamplifier 12, and the like are operated according to the mode of each of the function selection switches 20-1 to 20-n.

FIG. 5 is a flowchart for explaining various switch operation procedures in FIG. First, when the audio apparatus is in a power-off (stopped) state (step I), and when the user wants to operate the cassette tape recorder (step II), the user inserts the cassette tape into the slot 21.
3 (step III), the audio device is immediately turned on and all switch functions of various switches on the front of the device are set to the cassette mode. Among these switches, the cassette discharge switch 20-
If the user selects and operates the 1 and beep sound selection switches 20-14 (steps IV and V), it cannot be predicted which switch will be operated next. On the other hand, FF switch 20-3, REW switch 20-4 and 1
When the song repeat switch 20-12 is operated, the STOP
It has been determined that the release operation is performed by operating the switch 20-2 (step VI). That is, in the latter case, there is no room for switch selection. Therefore, in this case, if the release operation is performed by operating any switch on the front surface of the apparatus by the CPU 10, the user does not need to perform unnecessary switch selection operation.

On the other hand, when the cassette tape is not inserted and the tuner is in the power-off state, only the operation of turning the tuner to the power-on state by operating the switch is left (step VII). ). Therefore, also in this case, it is preferable that the tuner power be turned on by all the switches. Further, among various switches set to the tuner mode (step VIII), when a scan-up (frequency increase) switch and a scan-down (frequency decrease) switch for automatically scanning a reception frequency and the like are operated ( Only step IX) and then the release operation (step X) remain. Therefore, also in this case, the release operation can be performed by all the switches. Then, from Step IV to Step
The process of VI will be described in more detail.

FIG. 6 is a flowchart for explaining the switch operation procedure from FF and REW to STOP. After inserting the cassette tape to make it in the loading state,
When performing the REW, first, the location of the FF switch 20-3 or the REW switch 20-4 on the front surface of the apparatus is visually confirmed (steps A and B). Next, when a finger or the like is pressed against the position of the switch and pressed, the cassette tape recorder is activated and FF or REW is started (step C). If the user is notified of the operation of the switch by a beep sound, the operation of the switch can be confirmed without checking the tape running state or the like (step D). Further, when it is desired to release FF or REW, any switch on the front face of the apparatus may be pressed, so that it is possible to perform the switch operation by hand gesture without relying on visual inspection (step E). In particular, in the case of an in-vehicle audio device, a visual check for selecting a switch is conventionally performed (see the flowchart of FIG. 21).
Driving operation becomes easier and safety is improved. Also in the case of performing the above-described releasing operation, it is preferable to notify the user of the operation of the switch by a beep sound (step F).

FIG. 7 is a circuit diagram showing a first modification of FIG. Here, the function conversion means 3 is an OR circuit element which receives control signals from all the function conversion switches 2-1 to 2-n as inputs.
13 and an AND circuit element 23 to which the output signal of the OR circuit element 13 and the enable signal EN from the CPU 10 are input. That is, in this case, the function conversion means 3
Are realized by hardware composed of all logic circuit elements. Further, the output of the AND circuit element 23 is connected to the CPU 10 via the OR circuit element.

In FIG. 7, when the FF switch 20-3 and the REW switch 20-4 are operated, the corresponding control signals are
The level of the enable signal EN that is input to the CPU 10 changes from the normal “L” (Low) to “H” (High). Then, FF and R
Multiple function selection switches 20-1 to 20 to release EW
If any one of -n is operated, the output level of the OR circuit element 13 becomes “H”. Therefore, the output level of the AND circuit element 23 also becomes “H”, and the pseudo stop signal S _s ′ is input to the CPU 10. That is, a stop signal from the STOP switch 20-2
FF and by either S _s and pseudo stop signal S _s'
REW can be released.

In the first modified example, the hardware is increased as compared with an example of the audio device as the premise of the present invention (see FIG. 2). However, when the function selection switch is added, software such as a microcomputer is changed. This has the advantage of eliminating the need.

FIG. 8 is a circuit diagram showing a second modification of FIG. However, here, only the main part of the audio device is shown. In FIG. 8, the function conversion switch 20-1 is shown.
An OR circuit corresponding to the OR circuit element 13 in FIG. 7 is formed by connecting one end of each of the diodes 30-1 to 30-n to each of the elements 20 to 20-n. Furthermore, the above diodes 30-1 to 30
7 is connected to the other end of the common circuit −n through a diode 31 for preventing reverse voltage, and a switching transistor 32 to which an enable signal EN is input is connected.
An AND circuit corresponding to 3 is formed. In addition, stop signal
S _s and the pseudo stop signal S _s ′ are connected to the CPU 10 via the switching transistors 33 and 34, respectively.
One of the seed signals S _s and S _s ′ is input to the CPU 10.

In the second modification, the specific operation of the function conversion means 3 (FIG. 7) is the same as that of the first modification, except that the components of the logic circuit are different from those of the first modification (FIG. 7). The same is true.

FIG. 9 is a hardware configuration diagram showing an embodiment based on FIG. 1B (hereinafter, referred to as a first embodiment). here,
Sound field generator 4 in the second audio device (FIG. 1B)
Is a DSP40 consisting of various digital filters and this D
This is realized by the CPU 10 such as a microcomputer that controls the operation of the SP 40. In the DSP 40, the initial delay time t _e and performed in the audio signal S _i from the cassette tape recorder, etc. A / D all the converted arithmetic processing of multiply-add and the like to the digital audio signal obtained by real-time Reverberation time _tr
A desired sound field is generated by changing sound field parameters such as. Further, the sound field mode selection means 14 (19th
As shown in FIG. 10, a sound field mode selection switch (indicated as “EFC” in FIG. 10) 44 is disposed on the front surface of the microcomputer as shown in FIG. Further, in the sound field parameters, time selection switch for selecting the time parameter such as the initial delay time t _e and reverberation time t _r (in FIG. 10 labeled "TIME") 4
5 are arranged. Further, by integrating the change start function and the change stop function in the sound field parameter change start means 5 and the sound field parameter change stop means 6, adjustment for time extension and time reduction can be performed by one switch. , Time extension start / stop switch
15 and time reduction start / stop switch 25 (in FIG. 10,
Displayed as "+" and "-" respectively.
15 and -switch 25) are arranged on the front surface of the microcomputer as described above. In addition to the above switches, a level selection switch (shown as “FUNC” in FIG. 10) that selects either the level of the signal after the initial delay or the level of the reverberation signal is provided on the front of this microcomputer. And up and down switches (10th) that automatically increase or decrease these levels.
In the figure, various switches such as “UP” and “DOWN” are provided. Further, a display unit 13 for visually displaying the current sound field mode and the set values of the sound field parameters is connected to the CPU 10 in the same manner as the example of the audio apparatus (FIG. 2) as a premise of the present invention. . Then
Various operations of the CPU 10 will be described in detail. FIG. 11 is a flowchart for explaining a sound field mode selection procedure in FIG. However, in this case, a case where one sound field mode is selected from four types of sound field modes of a concert hall, a live house, a church, and stadium will be described as a representative.

First, the above four types of sound field modes are made to correspond to the mode counter values of 1, 2, 3, and 4, respectively, by the mode counter of the microcomputer, and the sound field mode selection switch (EFC) 44 is pressed to operate (switch). On) The mode number corresponding to the current sound field is displayed on the display unit 13 (step a). Next, when it is desired to select another sound field mode, the sound field mode selection switch 44 is pressed again to increment the mode counter (step b). The mode counter switches periodically in the order of 1 → 2 → 3 → 4 → 1. That is, when the mode counter reaches 5 (step c), the mode count value is automatically set to 1 (step d). Here, when the desired sound field mode is the concert hall, if the mode counter value is kept as it is, that is, if it is set to 1, the CPU 10 immediately sets the sound field mode of the concert hall (step e, step f). . Further, when the desired sound field mode is the live house, if the mode counter value is incremented to 2, the CPU 10 immediately sets the sound field mode of the live house (step g, step h). Further, if the desired sound field is a church and a stadium,
If the mode counter values are set to 3 and 4, respectively, the corresponding sound field mode is immediately set. (Step i, Step j and Step k). Incidentally, the audio signal S when it is not necessary to add a sound effect for the _i, the sound field mode selection switch 44 for a predetermined time (e.g., 1.5s
ec) The switch may be turned off by pressing at least (step l).

FIG. 12 is a flowchart for explaining the sound field parameter selection procedure in FIG. However, in this case, as the sound field parameter, and it will be described as a representative case of selecting either one of the two time parameters of the initial delay time t _e and reverberation time t _r.

Here, in the CPU 10, prepared in advance reverberation flag indicating the DSP40 is or or or reset respectively set state is a mode for setting the reverberation time t _r a mode to set the current initial delay time t _e deep. Further, by pressing a time selection switch (TIME) 45 and inputting data to the CPU 10, a time setting mode can be switched and selected. When the time selection switch 45 is pressed while the reverberation flag is set (step m), the CPU 10 clears the reverberation flag and sets the DSP 40 to the initial delay time setting mode after resetting the reverberation flag. (Step n). On the other hand, if the time selection switch 45 is pressed while the reverberation flag is in the reset state (step m), the mode is set to the reverberation time setting mode (step o).

13 and 14 are flowcharts for explaining the time adjustment procedure of the time parameter in FIG. 9, and FIG. 13 is a flowchart for extending the time.
FIG. 14 is a flowchart in the case of shortening the time.

In FIG. 13, when the + switch 15 is pressed to turn on the switch (step p), if the switch-on is the first time, the up start flag in the CPU 10 is set (step q). At this time, the set value of each reverberation time depending on whether the initial delay time setting mode or a reverberation time setting mode t _r or the initial delay time t _e is gradually automatically increased by one step. Then, if the + switch 15 is pressed again (step p),
Since the up start flag is cleared to be in the reset state, the increase of the set value is stopped and fixed to one value, and the adjustment of the time parameter is completed (step r).
It should be noted that, even if the limit reached by the hardware (for example, see FIG. 20) is reached while the set value is increasing, the increase in the set value is immediately stopped (step s).

On the other hand, in FIG. 14, when the switch 25 is turned on by pressing the -switch 25 (step p '), if the switch-on is the first time, the down start flag in the CPU 10 is set. (Step q '). At this time, the set value of the reverberation time t _r or the initial delay time t _e is gradually automatically decremented by one step. Thereafter, if the above-mentioned switch 25 is pressed again (step p '),
Since the down start flag is cleared to be in the reset state, the decrease of the set value is stopped and the adjustment of the time parameter is completed (step r '). In this case as well, when the limit by the hardware is reached, the increase of the set value is stopped (step s').

FIG. 15 is a flowchart for explaining a time parameter adjustment procedure by an increment / decrement timer. In this case, the program of the timer interrupt routine of the increment decrement timer provided in a part, is varied every step in reverberation time t _r or the initial delay time t _e the predetermined time unit (e.g., 3sec). More specifically, when the reverberation flag is in the set state (step t), the up start flag or the down start flag is set in the + switch 15 or the − switch 25, respectively, and the reverberation is performed at predetermined time intervals by the timer. The time _tr is increased or decreased (step u, step v, and step w).
Thereafter, when the switches 15 and 25 are pressed again, the operation of the timer is stopped and the adjustment of the set value of the reverberation time is completed. Also in this case, the adjustment of the set value is performed within the limits of the hardware (step x). On the other hand, when the reverberation flag is reset (step t), the set value of the initial delay time t _e is adjusted by a procedure similar to that described above (step u'~ step x ').

In the first embodiment (see FIG. 9), it is possible only by operating one switch of the device front face 2 times to adjust the sound field parameters such as reverberation time t _r to the desired set point The switch operation for adjusting the sound field parameters is much easier than before. In particular, in the case of an in-vehicle audio device, the user listens to the reproduced sound at his / her listening position after the first switch operation, and operates the same switch again when a desired sound field effect is obtained. The sound field parameters are kept as they are. Therefore, the user can easily obtain the optimal sound field effect for his / her listening position.

FIG. 16 is a hardware configuration diagram showing an embodiment based on FIG. 1C (hereinafter, referred to as a second embodiment). here,
A plurality of function selection switches based on the premise of the present invention (FIG. 2)
20-1 to 20-n correspond to at least the first embodiment (the ninth embodiment).
Figure) Sound field mode selection switch 44, time selection switch 4
5, a + switch (time extension start / stop switch) 15 and a − switch (time reduction start / stop switch) 25. Further, the + switch 15 and the-switch described above
Paying attention to the fact that the operation corresponding to the second operation of 25, that is, the operation of stopping the change of the set value of the sound field parameter has been determined,
This change stop operation is performed for all function selection switches 20-1 to 20-1.
20-n. By doing so, the switch operation for adjusting the sound field parameters is easier than in the case of the first embodiment, and the operability of the switch is further improved.

FIG. 17 is a hardware configuration diagram showing an embodiment based on the first and second principles of the present invention. However, here, a case where the set value change notification means 7 is provided in the audio device of the first embodiment (that is, an embodiment based on the first principle of the present invention) will be exemplified.

Here, the set value change notification means 7 includes an oscillating unit 17 that outputs a signal such as a rectangular wave in response to a trigger signal from the CPU 10.
And a notification sound generation unit 27 such as a speaker that generates a notification sound such as a beep sound in accordance with a signal from the oscillation unit 17. Further, a notification sound presence / absence selection switch 37 for selecting the presence / absence of the notification sound in accordance with the place of use or the like is provided. If the user presses the notification sound selection switch 37, a trigger signal is input from the CPU 10 to the oscillation unit 17 every time the set value of the sound field parameter increases or decreases by one step, and a notification sound is generated. The notification sound allows the user to recognize the change in the set value aurally, which is particularly effective when adjusting the in-vehicle audio device during traveling. In FIG. 17, the set value change notification means 7 is attached to the CPU 10, but a beep sound can be generated by an oscillator or the like built in the CPU 10.

In addition, the reverberation time
The case where the _tr and the initial delay time t _e are adjusted has been described. However, when the level selection switch, the up switch, and the down switch (both in FIG. 10) on the front of the microcomputer are pressed, the level of the reverberation signal and the initial delay are adjusted. Can be easily adjusted by a simple switch operation.

[Effect of the invention]

As described above, according to the present invention, when performing various operations such as fast-forward and rewind operations of a cassette tape and adjustment of sound field parameters in an audio device, operation of switches and the like on the front surface of the device becomes easier than before. Operability can be improved. In particular, in the case of an in-vehicle audio device, unnecessary switch operations and the like during traveling can be reduced, so that safety can be improved.

[Brief description of the drawings]

FIG. 1A is a block diagram showing a configuration example of an audio device as a premise of the present invention, FIG. 1B is a block diagram showing a configuration of an audio device as a premise of the first principle of the present invention, and FIG. 1C is a device of the present invention. FIG. 1D is a block diagram showing the configuration of the first and second principles of the present invention, and FIG. 2D is an audio device as a premise of the present invention. FIG. 3 is a diagram showing a configuration example of a front part of the audio device in FIG. 2, FIG. 4 is a flowchart for explaining a main operation of the CPU, FIG. 5 is FIG. 6 is a flowchart for explaining switch operation procedures from FF and REW to STOP in FIG. 6, FIG. 7 is a circuit diagram showing a first modification of FIG. 2, 8th Is a circuit diagram showing a second modification of FIG. 2, FIG. 9 is a hardware configuration diagram showing an embodiment based on FIG. 1B, FIG. 10 is a diagram showing an example of a switch arrangement of the microcomputer, FIG. Is a flowchart for explaining a sound field mode selection procedure in FIG. 9, FIG. 12 is a flowchart for explaining a sound field parameter selection procedure in FIG. 9, and FIG. 13 is a time extension of a time parameter in FIG. 14 is a flowchart for explaining the procedure, FIG. 14 is a flowchart for explaining the time reduction procedure of the time parameter in FIG. 9, FIG. 15 is a flowchart for explaining the time parameter adjustment procedure by the increment / decrement timer, FIG. 16 is a hardware configuration diagram showing an embodiment based on FIG. 1C. FIG. 17 is a hardware diagram showing an embodiment based on the first and second principles of the present invention. FIG. 18 is a block diagram showing a conventional first audio device having a plurality of function selecting means, and FIG. 19 is a block diagram showing a conventional second audio device having a sound field generating function. FIG. 20 is a diagram showing an example of setting sound field parameters, and FIG. 21 is a flowchart for explaining the problem of FIG. In the drawing, 1 ... Signal processing unit, 2-1 to 2-n ... A plurality of function selection means, 3 ... Function conversion means, 4 ... Sound field generation unit, 5 ... Sound field parameter change start means, 6 ... Sound field parameter change Stop means, 7: Set value change notification means, 10: CPU, 19: Speaker, 40: DSP.

Continuation of front page (72) Inventor Kago Masuda 1-2-2, Goshodori, Hyogo-ku, Kobe City, Hyogo Prefecture Inside Fujitsu Ten Co., Ltd. (56) References JP-A-60-41391 (JP, A) JP-A-63 JP-A-8-87000 (JP, A) JP-A-64-8576 (JP, A) JP-A-1-124709 (JP, U) JP-A-57-18870 (JP, Y2)

Claims (1)

(57) [Scope of request for utility model registration] An audio signal (S _i ) is processed to output a reproduction signal (S _o ), and a plurality of function selecting means (2-1 to 2-1) are provided.
2-n) A vehicle-mounted signal processing unit having a signal processing unit (1) for processing various control signals input from the unit and causing the function selecting means (2-1 to 2-n) to perform corresponding operations. In the audio device, the signal processing unit (1) includes at least a sound field generation unit (4) that processes the audio signal (S _i ) using a sound field parameter to generate a predetermined sound field. The selecting means (2-1 to 2-n) includes at least
Sound field mode selection means for selecting one of the plurality of setting values of the sound field parameter according to the predetermined sound field mode and selecting the predetermined sound field mode to adjust the sound field parameter (14) sound field parameter change start means (5) for starting automatic change of the set value of the sound field parameter for each step by a first switch operation;
And a sound field parameter change stopping means (6) for stopping the change of the set value of the sound field parameter by a second switch operation and fixing the set value. And the function selecting means (2)
-1 to 2-n), when the next operation after at least one operation is specified as a certain operation in the function selection means (2-1 to 2-n), the function selection means (2 -1
To 2-n), which has a function conversion unit (3) for adding a function of executing the next operation by a second switch operation corresponding to any one of the above-described operations. When the function selecting means to be performed is the sound field parameter change stopping means (6), the function converting means (3) performs the function selecting means (2-1) other than the sound field parameter changing stopping means (6). ~ 2-n) by a second switch operation corresponding to any one of
The audio device is further configured to add a function of executing the next operation of the sound field parameter change start operation by the sound field parameter change start means (5). The audio device further includes the sound field parameter change start means (5). The method according to claim 1, further comprising: setting value change notifying means (7) for sequentially notifying the change of the set value as a sound each time the set value of the sound field parameter automatically changes by one step after the operation of (7). Audio equipment.