JPH0733100U - Parameter setting device for sound field control device - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the operability of the sound field mode selection operation that accompanies the source switching operation. [Configuration] Source selection from panel switch 6, DSP
The DSP mode memory 12 is related to the DSP CPU 11 that sets DSP parameters and DSP levels for signal processing in the signal processing unit 10 in response to an output signal related to mode selection and DSP level setting. It is equipped. The DSP mode memory 12 rewritably stores DSP mode and DSP level information corresponding to each of the sources S1 to S4. When a source switching operation is performed, the DSP C is used.
The PU 11 reads out the information of the DSP mode and the DSP level set at the time of the previous use in the selected source. Therefore, it is not necessary to reset the DSP mode and the DSP parameter every time the source is switched, and the operability can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for setting parameters in a device for controlling a sound field.

[0002]

[Prior art]

 2. Description of the Related Art In a vehicle-mounted audio device or the like, a device called a digital signal processor (DSP) has been conventionally incorporated in order to improve a listening feeling, for example, a realistic feeling. By using this DSP, the acoustic signal sent from the source is processed digitally and output to an amplifier and a speaker, even if the space in which the operator is present is, for example, in a car, it is as if it were a concert. The effect is as if it were a hall.

In a typical prior art parameter setting device for a sound field controller, each DSP mode corresponding to the sound field to be reproduced, ie, concert hall, live house, church, etc., is operated by an operator. It is set to switch by.

[0004]

[Problems to be solved by the device]

 In the above-mentioned prior art, each source in the audio device, such as a compact disc player (CD), a cassette player (CS), a frequency modulation broadcast receiver (FM), and an amplitude modulation broadcast receiver (AM), is set as the operator's preference. If the DSP mode is different, the operator must switch the DSP mode every time the source is switched. For example, it is assumed that the DSP mode is set to a concert mode with a high sense of presence when listening to CD sound, for example, classical music, by an audio device in an automobile. Next, when the source is switched to AM and the news is heard, the DSP mode is switched to the off mode to improve the clarity, and when the source is switched to the original CD, the DSP mode remains in the off mode. Therefore, when continuously listening to classical music, it is necessary to switch the DSP mode to the original concert mode, which makes the key operation complicated.

The object of the present invention is to improve the operability of the DSP mode switching operation corresponding to the source switching by switching to the DSP mode stored in advance for each source when switching the source. It is to provide a parameter setting device for a sound field control device.

[0006]

[Means for Solving the Problems]

 The present invention provides a source selection unit for selecting one source from a plurality of sources, a signal processing unit for controlling a sound field of an acoustic signal of the source selected by the source selection unit, and the signal processing unit. Parameter setting means for setting parameters necessary for signal processing in the means, parameter storage means for storing parameters corresponding to a plurality of sound field modes, and sound field modes corresponding to each source Sound field mode storage means of the source selected from the source selection means among the sound field modes stored in the sound field mode storage means based on a sound field mode selection signal from the outside. A parameter corresponding to the sound field mode stored in the sound field mode storage means is changed based on a source selection signal from the outside while changing the sound field mode. A parameter setting apparatus of the sound field control device and sets the signal processing means.

[0007]

[Action]

 According to the present invention, the acoustic signal of the source selected by the source selecting means is processed by the signal processing means based on the parameters set by the parameter setting means, for example, by adding a reflected sound or a reverberation sound. Processing is performed.

The parameter set by the parameter setting unit is stored in the parameter storage unit in correspondence with each of a plurality of sound field modes. The sound field mode storage means stores the sound field mode corresponding to each source.

The parameter setting means changes the sound field mode corresponding to the source selected by the source selection means based on a sound field mode selection signal input from a switch on the front panel, and further, It has a function of rewriting the contents of the sound field mode corresponding to the source stored in the sound field mode storage means to the changed mode. Further, the parameter setting means reads the sound field mode of the corresponding source stored in the sound field mode storage means in response to the source selection signal output from the source selection means, and outputs the sound field mode. It has a function of setting a parameter corresponding to the mode in the signal processing means.

Therefore, the sound field mode at the time of the previous selection is stored for each source, and when the source selection operation is performed by the source selection means, the previous sound field mode corresponding to the selected source is stored. Is set in conjunction with the source selection operation, and the operability of the sound field mode switching operation accompanying the source switching operation can be improved.

[0011]

【Example】

 FIG. 1 is a block diagram showing an electrical configuration of an embodiment of the present invention. The sound field control device 1 is composed of a head unit 2 and a DSP unit 3.

First, the structure of the head unit 2 will be described. The display unit 4 and the panel switch 6 are provided on the front panel of the head unit 2. The display unit 4 is realized by a fluorescent display tube, a liquid crystal display or the like, and responds to the output from the main CPU 5 to display the contents of the currently selected source, level, DSP mode and the like. The panel switch 6 is a switch for the operator to perform selection operations such as source selection, level setting, and DSP mode selection, and is realized by a push button or the like.

A RAM (random access memory) 7 is a memory for storing information accompanying the processing operation of the main CPU 5, and is a memory that can be rewritten at any time. Further, in the RAM 7, as will be described later, when the power source of the sound field control device 1 is cut off, the source for storing which source was last selected at the time of the previous energization for the next use. The last area SL1 is included. A ROM (Read Only Memory) 8 stores information such as programs and data for processing operations of the main CPU 5. In addition, the ROM 8 is stored in advance with initial setting information when the power of the sound field control device 1 is turned on for the first time, for example, information for automatically performing an FM broadcast receiving operation. An initial setting area PS1 for storing is included. The main CPU 5 is a central part that controls the operation of the sound field control device 1, and is realized by a microcomputer or the like.

Further, the head unit 2 includes a source S1 of a compact disc player (CD), a source S2 of a cassette player (CS), a source S3 of an FM broadcast receiver (FM), and an AM broadcast receiver ( A source S4 of AM) and a mixer 9 are further provided.

Next, the configuration of the DSP unit 3 will be described. Acoustic signals sent from the sources S1 to S4 via the mixer 9 are converted into digital signals by the analog-digital conversion circuit 16, and LSI (large scale) Signal processing unit 10 realized by an integrated circuit) performs digital signal processing such as addition of initial reflection sound and reverberation sound, and then is converted again into an analog signal by digital-analog conversion circuit 17, and then amplifier 14 The sound is converted into sound by the speaker 15 via the. The signal processing unit 10 includes DSP parameter registers RA to RD for storing DSP parameters for signal processing and a DSP level register RL for storing DSP levels. The DSP CPU 11 is for setting DSP parameters and DSP levels in the signal processing unit 10 based on the storage contents stored in the DSP mode memory 12 and the DSP parameter memory 13, and is not a microcomputer. Where is it?

The DSP mode memory 12 is for storing DSP mode information and DSP level information for each source S1 to S4, and is composed of a memory such as a rewritable RAM at any time. Therefore, the DSP mode memory 12 stores, for each source S1 to S4, DSP mode information such as off mode 0, concert mode 1, live mode 2, church mode 3, stadium mode 4, and disco mode 5. Further, DSP level information, for example, information such as 0, 1, 2, 3 ... Is stored.

The DSP parameter memory 13 is for storing DSP parameters corresponding to each DSP mode, and is realized by a ROM or the like. This DSP parameter is information for signal processing in the signal processing unit 10, for example, information regarding the level and delay time of the initial reflected sound and reverberation sound.

Next, the operation of the sound field control device 1 will be described. First, when the power is turned on, if it is the first power-on from the time of shipment from the factory, the main CPU 5 outputs information regarding the initial setting from the initial setting area PS1 and the ROM 8 including the initial setting area PS1. Information such as programs and data necessary for the processing operation is read.

At this time, for example, the contents stored in the initial setting area PS1 are selected as the source of the FM source S3, and further, the DSP mode information and the DSP level information for each of the sources S1 to S4 stored in the DSP mode memory 12. Are all stored in the off mode and the level 0.

At this time, the main CPU 5 causes the display unit 4 to display that the source is the source S3 of the FM, the DSP mode is the off mode, and the DSP level is level 0. At the same time, the source S3 is selected. Then, the information that the current source is the source S3 is written in the source last area SL1.

Further, at this time, the main CPU 5 outputs to the DSP CPU 11 that the current source is the source S3, and further, the DSP mode and the DSP level of each of the sources S1 to S4 are all. It outputs the off mode and level 0.

In response to the output of the main CPU 5, the DSP CPU 11 writes to the DSP mode memory 12 that the DSP mode and the DSP level are all in the off mode and level 0 in all the sources, and further, from the DSP parameter memory 13. The off mode parameter is read, and the off mode parameter and level 0 are set in the registers RA to RB and RL in the signal processing unit 10. Based on this, the signal processing unit 10 digitally processes the acoustic signal.

When the DSP mode or the DSP level is changed by operating the panel switch 6, the panel switch 6 outputs a DSP mode selection signal or a DSP level selection signal. In response to the selection signal, the main CPU 5 outputs the newly selected DSP mode or DSP level to the display unit 4 and the DSP CPU 11.

In response to this, the DSP CPU 11 sends the DSP mode information or the DSP level information regarding the source S3 of the FM currently selected in the DSP mode memory 12, to the newly selected DSP. Rewrite as mode information or DSP level information. When the DSP mode is changed, the DSP CPU 11 reads the DSP parameter relating to the changed DSP mode from the DSP parameter memory 13 and sets the DSP parameter in the signal processing unit 10. When the DSP level is changed, the DSP CPU 11 sets the changed DSP level in the signal processing unit 10.

When the source selection operation is performed by operating the panel switch 6, the panel switch 6 outputs a source selection signal. In response to the selection signal, the main CPU 5 outputs the newly selected source to the display unit 4 and the DSP CPU 11, and further, the source information stored in the source last area SL1 included in the RAM 7 is stored. To the newly selected source.

In response to the selection signal from the main CPU 5, the DSP CPU 11 firstly outputs the DSP mode information and the DSP level information about the source newly selected from the DSP mode memory 12, that is, which DSP mode was previously selected for that source. And whether the DSP level has been selected, for example, when it is level 2 in the live mode, the DSP parameter regarding the live mode is read from the DSP parameter memory 13, and the DSP parameter and the DSP level are read. It is set in the signal processing unit 10.

In the second and subsequent times, that is, in the case of normal power-on, the RAM 7 and the DSP mode memory 12 are backed up with the contents of the source, the DSP level and the DSP mode that were selected and set when the power was cut off after the last use. Based on the information, the main CPU 5 and the DSP CPU 11 perform setting processing on the signal processing unit 10.

FIG. 2 is a flow chart for explaining the operation of the embodiment of the present invention. At step a1, it is judged whether or not the DSP mode selection operation or the DSP level setting operation is performed from the panel switch 6, and if so, the process proceeds to step a6, and the DSP mode memory 12 corresponding to the currently selected source is selected. Is changed to the DSP mode or DSP level after the setting or selection operation, and then the process proceeds to step a5.

When the DSP mode or the DSP level is not changed in step a1, the process proceeds to step a2, and it is determined whether or not the source has been changed by performing the source selection operation from the panel switch 6, and if so, , Go to step a4. In step a4, the DSP mode and DSP level information corresponding to the changed source is read from the DSP mode memory 12, and the process proceeds to step a5. In step a5, the currently selected DSP level is set in the signal processing unit 10, and the DSP parameter corresponding to the currently selected DSP mode is read from the DSP parameter memory 13 and set in the signal processing unit 10. Then, the process proceeds to step a3.

When the source is not changed in step a2, the process proceeds to step a3, other operations such as output to the display unit 4 and writing to the RAM 7 are performed, and the process returns to step a1.

FIG. 3 is a conceptual diagram for explaining the stored contents of the DSP mode memory 12 of one embodiment of the present invention. Information corresponding to each source S1 to S4 and corresponding to each DSP mode, for example, 0 for off mode, 1 for concert mode, 2 for live mode, 3 for church mode, 4 for stadium mode, 5 for disco mode, Further, information about the DSP level, for example, 0, 1, 2, 3 ... Is stored.

Next, the specific operation of the embodiment of the present invention will be described. FIG. 4 is a state transition diagram showing the stored contents of the DSP mode memory 12. FIG. 5 is a diagram showing an operation procedure and a display example output to the display unit 4 in accordance with the operation, and FIG. 6 is a diagram showing an operation corresponding to each operation.

At present, it is assumed that CD is selected as the source, the DSP mode is set to the off mode, and the DSP level is set to level 0. At this time, step b1 in FIG. 5 and step c1 in FIG. 6 are performed. As shown in FIG. 4 (1), the contents stored in the DSP mode memory 12 are as follows: It is assumed that S2 stores a disco mode at level 2, source S3 stores a live mode at level 1, and source S4 stores a off mode at level 0. Further, the display section 4 displays that the DSP mode is the off mode and the DSP level is level 0 as shown in FIG. 5, for example.

Next, as shown in step b 2 of FIG. 5, when the DSP mode is changed from the off mode to the live mode and the DSP level is further changed from level 0 to level 2, Is displayed. Correspondingly, as shown in step c 2 of FIG. 6, the stored contents corresponding to the CD in the DSP mode memory 12 are as follows: DSP mode is OFF mode to live mode, DSP level is level 0 to level 2. Each is rewritten and the changed DSP mode and DSP level are set. At this time, the content stored in the DSP mode memory 12 is changed to the live mode at level 2 for the source S1 as shown in FIG. 4 (2).

Next, in step b3 of FIG. 5, when the source is switched to AM, as shown in step c3 of FIG. The DSP level information, here the off mode and level 0, is read and the off mode and level 0 are implemented. In response to this, the off mode and level 0 are displayed on the display unit 4, as shown in step b3 of FIG. However, here, the contents stored in the DSP mode memory 12 are as they are as shown in FIG. 4 (2).

Next, as shown in step b4 of FIG. 5, when the DSP mode is changed from the off mode to the concert mode, the contents of the operation are changed to DSP in step b2 and step c2 in FIGS. The same operation is performed as when only the mode is concerned. At this time, the contents stored in the DSP mode memory 12 are changed to the concert mode in the DSP level until the DSP level in the source S4 as shown in FIG. 4C.

Further, when the source is switched to the CD in step b5 of FIG. 5, the same operation as in step c3 is performed in step c5 of FIG. 6, and the DSP mode when the previous CD is selected and the The live mode, level 2, which is the DSP level, is set. At this time, the stored contents of the DSP mode memory 12 remain as in FIG. 4 (3).

Further, the DSP level is changed to level 4 in step b6 of FIG. 5, and at this time, in step c6 of FIG. 6, the same operation as the DSP level changing operation of the operation in step c2 is performed. As a result, the contents stored in the DSP mode memory 12 are changed to the level 4 while the source S1 remains in the DSP mode as shown in FIG. 4 (4).

As described above, in the sound field control device 1 according to the present invention, the DSP mode memory 12 is provided in association with the DSP CPU 11, and the DSP mode and the DSP level of each source are stored. It is not necessary to reset the DSP mode and DSP level each time the source switching operation is performed, and the operability of the DSP mode and DSP level switching operation associated with the source switching operation can be improved.

[0040]

[Effect of device]

 As described above, according to the present invention, when the source selection operation is performed, since the previous sound field mode is stored for each source, the previous sound field mode corresponding to the newly selected source is stored. It is set in conjunction with the source selection operation. For example, in a car, etc., when a compact disc player (CD) is selected as the source and listening to classical music, the sound field mode is set to the concert mode. Next, when switching the source to, for example, an AM receiver (AM) and listening to news, etc., if the OFF mode was selected as the sound field mode when AM was selected last time, the sound field is automatically selected. The mode is set to off mode. Furthermore, when the source is returned to the original CD, the concert mode is automatically set. Therefore, it is not necessary to reset the sound field mode each time the source is switched, and the operability of the sound field mode selection operation associated with the source switching can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a sound field control device 1 according to an embodiment of the present invention.

FIG. 2 is a flow chart for explaining the operation of an embodiment of the present invention.

FIG. 3 is a conceptual diagram for explaining stored contents of a DSP mode memory 12.

FIG. 4 is a state transition diagram showing stored contents of the DSP mode memory 12.

FIG. 5 is a diagram showing an operation procedure and display contents output to the display unit 4 in accordance with the operation.

FIG. 6 is a diagram showing an operation corresponding to each operation.

[Explanation of symbols]

 1 sound field control device 2 head unit 3 DSP unit 4 display unit 5 main CPU 6 panel switch 7 RAM 8 ROM 9 mixer 10 signal processing unit 11 DSP CPU 12 DSP mode memory 13 DSP parameter memory 14 amplifier 15 speaker 16 analog-digital Conversion circuit 17 Digital-analog conversion circuit S1 to S4 source SL1 source last area PS1 initial setting area RA, RB, RC, RD DSP parameter register RL DSP level register

Claims (1)

[Scope of utility model registration request] 1. A source selecting means for selecting one source from a plurality of sources, a signal processing means for controlling a sound field of an acoustic signal of the source selected by the source selecting means, and the signal processing. Parameter setting means for setting parameters necessary for signal processing in the means, parameter storage means for storing parameters corresponding to a plurality of sound field modes, and sound field modes corresponding to each source Sound field mode storage means, and based on an external sound field mode selection signal, the sound field of the source selected by the source selection means among the sound field modes stored in the sound field mode storage means. The mode is changed, and on the other hand, the parameter corresponding to the sound field mode stored in the sound field mode storage means is set based on the source selection signal from the outside. A parameter setting device for a sound field control device, characterized by being set in a signal processing means.