JP2000152400A - Audio monitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an audio monitor to monitor a plurality of audio signals whose kinds differ from each other as audio signals. SOLUTION: This audio monitor 1, that receives audio signals from audio signal input lines 20a, 20b for monitoring them, is provided with input means 18a, 18b that use a plurality of kinds of input boards so as to receive audio signals of different kinds as the audio signals, and a selection means 17 that selects one channel from among the audio signals obtained from the input means 18a, 18b and outputs it as acoustic signal so as to monitor a plurality of the audio signals of different kinds for each channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio monitor device, and more particularly to an audio monitor device capable of monitoring a specific type of audio signal from a plurality of audio signals having different signal types as a signal source of the audio monitor device. Things.

[0002]

2. Description of the Related Art In an example of a conventional audio monitor apparatus in a broadcasting station, as described above, each of a plurality of transmission lines of a plurality of audio signals of the same standard output from a plurality of signal sources is branched by a distributor. The plurality of audio signals are input to the audio monitor device, and an audio signal of a signal source to be monitored is selected from among the input audio signals from the plurality of signal sources by a logic circuit provided in the audio monitor device. 2. Description of the Related Art There is known a device which amplifies a signal to a predetermined power level, supplies the amplified signal to a rear speaker unit or a headphone unit, converts the signal into an acoustic signal, and monitors the signal.

[0003]

In an example of a conventional audio monitor device in a broadcasting station, a distributor splits each of a plurality of transmission lines of a plurality of audio signals of the same standard output from a plurality of signal sources. The plurality of audio signals are input to a monitor device, and an audio signal of a signal source to be monitored is selected from the input plurality of audio signals by a logic circuit provided in the audio monitor device.

Therefore, when the power supply of the audio monitor device is cut off, for example, when the use of the audio monitor device is terminated, the selected state in the logic circuit is also lost. In this case, there is a disadvantage that an operation of resetting the selection state is required. Particularly, in an example of an audio monitor device in a broadcasting station, transmission that requires constant monitoring among transmission lines of a plurality of audio signals is required. Since there is a line and a transmission line that does not need to be monitored constantly and can be monitored from time to time, select the transmission line that must be constantly monitored when the audio monitoring device is turned on again and put into use. Operation is required, and there is a possibility that this selection operation may be forgotten or an error may occur. There is a disadvantage.

Further, in recent years, a serial digital interface (hereinafter referred to as SDI) technology for combining audio signals of a plurality of standardized channels and transmitting the same through a single cable has been advanced, and SMPTE259 has been developed.
A method is standardized worldwide as the M standard or the IEEE 1394 standard, and the audio signal and the video signal of different standards are combined together and transmitted by one cable, especially for transmitting audio signals in a broadcasting station. are doing.

[0006] SMPTE is the Society of Motion Pi
cture Television Engineerings SMPTE2
59M refers to the serial number of the standard defined as the SMPTE standard, and IEEE refers to the Institute of Electrical and El
IEEE1394 is an abbreviation of ectronics Engineers.
Refers to the standard reference number determined by the EEE Committee.

[0007] The SMPTE259M standard and IEEE
Although the 1394 standard is originally a different standard, SMPTE2
When the 59M standard and the IEEE 1394 standard are described collectively, they will be referred to as SMPTE / IEEE standards hereinafter.

[0008] Considering the evolution of the technology for combining multi-channel signals having different standards from each other and enabling transmission over a single cable, a signal obtained by combining signals of various standards by the audio monitor itself is considered. Must be provided as an input, and a function of selecting an audio signal of a standard that needs to be monitored and inputting the selected audio signal to the audio monitor device.

[0009] Further, considering the advance of the technology of signal integration such as SDI, the channel configuration of the audio signal itself of each standard is also the right audio (R-Ch) and the left audio (L-Ch).
-Ch), it is possible to transmit a signal obtained by combining a plurality of signals having different standards from each other and configured in multiple channels such as 4 × 4 channels, not limited to two channels. Therefore, in the case of such a composite signal, select an audio signal of a standard to be monitored,
Further, a function of selecting a channel that needs to be monitored from the selected signal is required.

Further, when the channel configuration of the audio signal itself is multi-channel,
When the audio monitoring device is started, a function that can automatically select a channel that needs to be monitored with priority from the multiple channels is also required. Therefore, monitoring is performed until the audio monitoring device is stopped. It is also necessary to have a function of storing the stored channel and then automatically selecting the stored channel and monitoring when the audio monitor device is started thereafter.

In view of the above, the present invention provides an audio monitoring apparatus for monitoring a plurality of types of audio signals having different audio signal standards. Means for setting a selection state in accordance with the standard of the audio signal monitored by the audio monitor device, so that the audio monitor device can be used as a monitor for a plurality of audio signals having different signal standards from each other; The purpose is to improve the usability of the device.

[0012]

SUMMARY OF THE INVENTION An audio monitor apparatus according to the present invention is an audio monitor apparatus for monitoring a plurality of types of audio signals having different audio signal standards, the plurality of types having different audio signal standards. Means is provided for setting a selection in accordance with the standard of the audio signal to be monitored by the audio monitor device among the audio signals, so that a plurality of audio signals having different signal standards can be monitored.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an audio monitoring device according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an audio monitor device, which comprises a control unit 10 and a panel unit 30.

First, the control section 10 of the audio monitor 1 will be described with reference to FIG.

The control unit 10 includes a CPU 11, a ROM 12, an R
AM 13, nonvolatile memory 14, peripheral device I / O unit 1
5, selector I / O unit 16, audio signal selector unit 17, first input board unit 18a, second input board unit 18b, first input control I / O unit 19a, second input control I / O unit Unit 19b, the first signal input line 20a, the second
Signal input line 20b, first signal output line 21a
And the second signal output line 21b.

The input side of the first input board section 18a is connected to the first
, The input side of the second input board section 18b is connected to the second signal input line 20b, and the control data input / output side of the first input board section 18a is connected to the first input control section. It is connected to the data port of the CPU 11 via the I / O unit 19a, and the control data input / output side of the second input board unit 18b is connected to the data port of the CPU 11 via the second input control I / O unit 19b. .

Each of the audio signal output side of the first input board section 18a and the audio signal output side of the second input board section 18b is connected to the audio signal input side of the audio signal selector section 17.

The control signal input / output side of the audio signal selector 17 is connected to the CP via the selector I / O 16.
U11 is connected to the data port, and the operation data input / output side of the selector operation unit 38 is connected to the C via the peripheral device I / O unit 15.
Connected to the data port of PU11, ROM12, RAM
The data input / output sides of the memory 13 and the nonvolatile memory 14 are connected to the data ports of the ROM 12, the RAM 13 and the nonvolatile memory 14 of the CPU 11, respectively.

The CPU 11 is a microprocessor for controlling the entire operation of the audio monitor 1, and the ROM 12 is
A memory that stores fixed data such as an operation program of the PU 11 and a RAM 13 are RAMs that constitute a work area when the CPU 11 controls the operation of the audio monitor device 1.

The nonvolatile memory 14 stores the setting of the audio signal selector 17 at the time when the power of the audio monitor 1 is turned off, and then stores the setting in the nonvolatile memory 14 when the power is turned on. This is a rewritable nonvolatile memory provided for setting the audio signal selector 17 in the set state.
The setting state will be described later.

Next, the panel section 30 will be described with reference to FIGS. 1, 2A and 2B.

The panel section 30 has a first signal amplifier 30a having an input connected to the first signal output line 21a, and a first signal amplifier 30a connected to the first signal amplifier 30a for adjusting the output signal level of the amplifier 30a. Variable resistor 31a, the first speaker 3 connected to the output side of the first signal amplifier 30a
2a, a first VU meter 33a connected to the first signal amplifier 30a and displaying the output level of this signal amplifier 30a
Is provided.

The panel section 30 also includes a second signal amplifier 30 having an input connected to the second signal output line 21b.
b, connected to the second signal amplifier 30b and
Second variable resistor 31 for adjusting output signal level of 0b
b, a second speaker 32b connected to the output side of the second signal amplifier 30b, a second VU meter 33b connected to the second signal amplifier 30b and displaying the output level of the signal amplifier 30b, and a selector operation unit 38 Is provided.

The panel section 30 also has an operation panel 35, and a speaker grill 36a,
A VU meter panel 37 in which a speaker grill 36b, a first VU meter 33a, and a second VU meter 33b are disposed;
A selector operation panel 39 constituting a keyboard portion of the selector operation section 38, a first operation knob 34a for operating the first variable resistor 31a, and a second operation knob for operating the second variable resistor 31b. The operation knob 34b is arranged so as to be conveniently arranged for use of the audio monitor device 1.

The operation panel 35 has a first speaker 32a behind a speaker grill 36a as indicated by a dashed line.
And a second speaker 32b is arranged behind the speaker grill 36b.

The selector operation panel 39 includes a selector A button 51, a selector B button 53, a selector button S1, a selector button S2, a selector button S3 and a selector button S4, a selector button L1, a selector button L2, a selector button L3 and a selector button. Button L
4, selector button R1, selector button R2,
The selector button R3 and the selector button R4 are arranged at convenient positions on the selector operation panel 39.

In the following description, the selector A button 51 and the selector B button 53 are collectively referred to as a main selector button.
1, ‥‥ and the selector button R4 are collectively referred to as a sub selector button.

Each of the first input board section 18a and the second input board section 18b includes an analog signal input board, an AES / EBU standard board capable of inputting an AES / EBU standard audio signal, and an SMP
It has a structure in which each of three types of SMPTE / IEEE standard boards to which a TE / IEEE standard audio signal can be input can be detachably mounted.
Note that a processing board conforming to the SMPTE259M standard is used as the SMPTE / IEEE standard board in this example.

AES is an Audio Engineering Soci
The abbreviation for ety, EBU, is the abbreviation for European Broadcasting Union.

The audio signal of the AES / EBU standard is composed of a right audio (R-Ch) signal and a left audio (RC).
h) is composed of digitalized two-channel signals, and the SMPTE / IEEE standard audio signal is composed of four groups of 16-channel serial transmission digital signals, each group consisting of four-channel digital audio signals. Is done.

The signals input from the first signal input line 20a to the first input board unit 18a and the signals input from the second signal input line 20b to the second input board unit 18b are analog audio signals, respectively. Signal, A
ES / EBU standard audio signal and SMPTE2
It is composed of a composite signal composed of a 59M standard audio signal.

The first signal input line 20a has only one input board section as the first input board section 18a, and the second signal input line 20b has one input board section as the second input board section 18b. Only the input board part is prepared,
When one of these three types of boards is mounted on these board portions 18a and 18b, when mounting another board here, the mounted board is removed and then mounted. First signal input line 20
a and a second signal input line 20b to select any one of these analog audio signals, AES / EBU standard audio signals and SMPTE259M standard audio composite signals.

Next, the operation of the monitor device 1 when the selector buttons constituting each of the main selector buttons are operated will be described.

When the selector A button 51 is operated, the CPU 11 operates via the first input control I / O unit 19a.
From the first input board section 18a side to the operating state,
Of the audio signal selector 1 from the input board 18a of the
7 when the selector B button 53 is operated, the second input control I
/ 0 unit 19b, the second input board unit 18b side is set to the operating state from the CPU 11 and the second input board unit 18b
The audio signal can be input to the audio signal selector 17 from the audio signal selector 17.

Next, referring to FIG. 3B, when the selector A button 51 is operated, the first input board section 18a
The type of the first board unit 18a transmitted to the CPU 11 through the first control signal input board input / output unit 19a;
When the selector B button 53 is operated, the second input board I / O unit 19b
Board section 18b transmitted to CPU 11 via
The contents of the data indicating the type of board to be mounted on and the other data will be described.

When the selector A button 51 is operated, there is no mounted board (0: no board) from the first input board section 18a to the CPU 11 via the first input control I / O section 19a. ), State where analog board is mounted (1: analog board), AES / E
The state where the BU standard board is mounted (2: AES / E
BU board) and data IN0 that indicates whether the SMPTE259M standard board is mounted (3: SDI board) and data IN1 consisting of status data (status (0: no error)) are input.

It should be noted that the data IN1 for the CPU 11 is provided with data indicating that there is no mounted board (0: no board) because of the first reason such as maintenance of the audio monitor device 1. Since these boards may be kept detached from the input board section 18a, the CPU 11
This is to prevent a problem in the operation of the side.

When the selector B button 53 is operated, the data IN0 input from the second input board section 18b to the CPU 11 via the second audio signal input board input / output section 19a is transmitted to the selector A button 51. Is operated by the first input board unit 18a and the CPU 1
The data has the same contents as the data IN0 to be input with respect to 1.

Then, data specifying a selector button that can be selected from among the sub selector buttons according to the type of board mounted on the first input board section 18a and the second input board section 18b is stored in the "source". Select",
CPU 11 generates “L select” and “R select” data based on these input data IN0,
These “source select” generated in this way,
The “L select” and “R select” data are supplied to the audio signal selector 17 via the data selector I / O unit 16.

Next, referring to FIG. 3A, these "source select", "L select" and "R select" generated by the CPU 11 and supplied to the audio signal selector 17 via the data selector I / O unit 16. A selector button selected from the sub selector buttons according to the type of the board mounted on the first input board section 18a and the second input board section 18b based on the data will be described.

The selector button selected from the sub selector buttons according to the type of the board mounted on the first input board section 18a and the second input board section 18b
Since the selector button selected from the sub selector buttons according to the type of the board mounted on the first input board unit 18a is the same as the selector button selected from among the sub selector buttons, The following describes only the selector button selected from the second input board unit 1
The description of the selector button selected from the sub selector buttons according to the type of the board mounted on the board 8b will be omitted, and the description thereof will be omitted.

First, when the analog signal input board is mounted on the first input board section 18a, C
The control of the audio signal selector 17 from the PU 11 will be described.

When the selector A button 51 is selected, an analog audio signal is selected from an input signal from the first signal input line 20a by an analog signal input board mounted on the first input board section 18a. To the audio signal selector 17.

In accordance with this supply, the first input control I /
From the first input board unit 18a via the
An input IN0 indicating that the analog board is mounted on the first input board unit 18a for U11.
Supply data (1: analog board).

In response to this input IN0 (1: analog board) data, the CPU 11 outputs "source select", "L select", and "R select" data having the content of which of the sub selector buttons is to be enabled. To the selector I / O unit 16.

The selector I / O section 16 controls the audio signal selector section 17 according to this data, and
Of the upper sub-selector buttons, S1, L1, L
The operation of only the selector button S1, the selector button L1, the selector button L2, the selector button R1, and the selector button R2 indicated by 2, R1 and R2 is enabled.

In this state, the selector buttons S1, L
1 and R2 are selected, the first input board unit 18
The right (R-Ch) analog audio signal of this analog stereo signal supplied from a to the audio signal selector unit 17 is supplied to the second signal amplifier 30b through the second signal output line 21b and reproduced from the second speaker 32b. ,
The left (L-Ch) analog audio signal of the analog stereo signal supplied to the audio signal selector 17 is supplied to the first signal amplifier 30a through the first signal output line 21a, and is reproduced from the first speaker 32a.

In this state, the selector button S
When 1, L2 and R1 are selected, the right (R-Ch) analog audio signal of the analog stereo signal supplied from the first input board section 18a to the audio signal selector section 17 is output from the first speaker 32a to the left ( L-Ch) It is in a reproduction state in the reverse stereo where the analog audio signal is reproduced from the second speaker 32b.

Next, control of the audio signal selector 17 from the CPU 11 when the AES / EBU standard board is mounted on the first input board 18a will be described.

While the selector A button 51 is selected, an AES / EBU standard audio signal is selected from an input signal from the first signal input line 20a on the AES / EBU standard board mounted on the first input board unit 18a. This A
The ES / EBU standard audio signal is converted into an analog audio signal, and the analog audio signal is supplied to the audio signal input side of the audio signal selector 17.

In accordance with this supply, the first input control I /
From the first input board unit 18a via the
AES / EB for the first input board section 18a for U11
Input IN0 indicating that a U-standard board is mounted
Supply data (2: AES / EBU board).

The CPU 11 responds to the input IN0 data.
Supplies "source select", "L select", and "R select" data having the content of which of the sub selector buttons to enable to the selector I / O unit 16.

The selector I / O section 16 controls the audio signal selector section 17 according to this data, and
Of the upper sub-selector buttons, S1, L1, L
The operation of only the selector button S1, the selector button L1, the selector button L2, the selector button R1, and the selector button R2 indicated by 2, R1 and R2 is enabled.

In this state, the selector buttons S1, L
1 and R2 are selected, the first input board unit 18
a, the right (R-Ch) analog audio signal of the analog stereo signal supplied to the audio signal selector unit 17 from the second speaker 32b, and the left (L-Ch) analog audio signal of the analog stereo signal is the first speaker. 32
a. Also, the selector buttons S1, L
2 and R1, the right (R-Ch) analog audio signal of the audio signal is output to the first speaker 32a.
, The left (L-Ch) analog audio signal is reproduced from the second speaker 32b. That is, the stereo reproduction state is obtained by inverting left and right.

Next, control of the audio signal selector 17 from the CPU 11 when the SMPTE 259M standard board is mounted on the first input board 18a will be described.

When the selector A button 51 is selected, an audio signal of this standard is selected from the input signal from the first signal input line 20a by the SMPTE259M standard board mounted on the first input board section 18a, and this selection is made. The converted audio signal is converted into a four-channel 16-channel analog audio signal including four-channel audio signals as one group, and supplied to the selector unit 17.

In accordance with this supply, the first input board section 18a sends the first input board section 18a to the CPU 11 via the first input control I / O section 19a.
It supplies input IN0 data (3: SDI board) indicating that the TE259M standard board is mounted.

In response to this input information, the CPU 11 outputs “source select”, “L select”, and “R select” data having the contents of which of the sub selector buttons to enable, to the selector I / O unit 16. To supply.

The selector I / O section 16 controls the audio signal selector section 17 according to this data, and
Enable the operation of all the sub selector buttons above,
Further, by selecting any of the selector buttons S1,..., S4, an arbitrary group can be selected from the four groups, and the right (R- Ch)
An arbitrary right (R-Ch) analog audio signal channel is selected from the analog audio signal and the left (L-Ch) analog audio signal by the selector buttons R1,..., R4, and the selector buttons L1,. An arbitrary left (L-Ch) analog audio signal channel can be selected.

Therefore, any one of the first group, .DELTA., And fourth group is selected, and the right (R-Ch) analog audio signal channel and the left (L-Ch) selected by arbitrarily combining the sub selector buttons are selected. -Ch) The analog audio signal channel can be reproduced from the first speaker 32a and the second speaker 32b.

Next, the contents of information stored in the nonvolatile memory 14 will be described with reference to FIG. 4A.

The non-volatile memory 14 stores 1 byte in each byte.
A write count (High) data storage area 91, a write count (Low) data storage area 92,
Write time difference data storage area 93, change start flag storage area 94, A board type data storage area 95, B board type data storage area 96, A / B selection data storage area 97, first S selector button setting data storage area 9
8, the first L selector button setting data storage area 99,
The first R selector button setting data storage area 100, the second S selector button setting data storage area 101, the second
, An L selector button setting data storage area 102, a second R selector button setting data storage area 103, and a checksum data storage area 104.

In each of these data areas, the A monitor type data storage area 95,..., And the second R selector button setting data storage area 103 are stored in the audio monitor device 1 respectively.
When the power supply is turned off from the on state, the following data is stored.

In the A board type data storage area 95, the type of the board mounted on the first input board section 18a side at this time is an analog signal input board, an AES / EBU.
Data on which of the standard board and the SMPTE259M standard board is stored is stored in the B board type data storage area 96 at this time, the board mounted on the second audio signal input board unit 18b side. Is stored as to which of these boards the type is.

The A / B selection data storage area 97 stores data indicating which of the selector A button 51 and the selector B button 53 has been operated at this time.

In the first S selector button setting data storage area 98, the selector buttons S1,.
Data indicating which one of 4 has been operated is stored.

In the first L selector button setting data storage area 99, the selector buttons L1,.
4 is stored in the first R-selector button setting data storage area 1
00, the selector buttons R1,..., R4 at this time when the selector A button 51 is being operated.
Is stored which indicates which of them has been operated.

In the second source selector button setting data storage area 101, the selector buttons S1,.
The data indicating which one of ‥ and S4 has been operated is stored.

In the second L selector button setting data storage area 102, the selector buttons L1,.
Data indicating which of L4 has been operated is stored, and the second R selector button setting data storage area 103 stores the selector buttons R1 and R1 at this time when the selector B button 53 is being operated. ‥‥, R
Data indicating which one of 4 has been operated is stored.

Number of Writes (High) Data Storage Area 91
And the write count (Low) data storage area 92 includes:
The total number of times data has been written in any of these areas 93,..., 104 is stored. In addition,
The number-of-writes (High) data storage area 91 stores data of the number of digits higher than the number of times of writing, and the number-of-writes (Low) data storage area 92 stores data of the number of digits lower than the number of times. .

In the write time difference data storage area 93,
The time difference data between when the previous operation is performed on any one of the main selector button and the sub selector button and the next operation is performed is stored for each of the selector buttons.

If any of these memory areas 91, # 93, 95, #, and 104 is writing data or updating data, the change start flag storage area 94 A change start flag is stored to prevent the power of the monitor device 1 from being turned off from the on state.

When the writing or updating of the data is completed, the change start flag storage area 94
The change start flag stored in (1) is deleted, and the power supply can be operated from the on state to the off state.

However, the state in which the change start flag is stored in the change start flag storage area 94, that is, each of these memory areas 91, # 93, 95, #, 104
When the power of the audio monitoring device 1 is changed from the on state to the off state due to an abnormal power failure such as a power failure while any one of the above is writing data or updating the data, the change start flag is stored. The state in which the change start flag is stored in the area 94 is continuously maintained.

Thus, when the power of the audio monitor device 1 is turned on, the CPU 1 determines that the change start flag has been stored in the change start flag storage area 94.
1, the respective memory areas 91,.
The CPU 11 judges that the data stored in each of 93, 95,..., And 104 is inappropriate data, and does not use the stored data. Instead, the data is stored in the ROM 12 as a default value. In this case, the audio monitor device 1 is turned off in an abnormal state due to a power failure such as a power failure while writing or updating the data.

The checksum data storage area 104 stores checksum data for error correction of the data stored in each of the memory areas 91,..., 103 of the nonvolatile memory 14 constituting this memory area. Is done.

When writing or updating data in each of these memory areas, the start flag of the change start flag storage area 94 is set to ON = 1, and then data is written or written in each of these memory areas. And performs a checksum operation on the memory area where the data is written or the data is updated,
After writing this calculation result in the checksum data storage area 104, this flag is set to off = 0, and after this flag is set to off = 0, the power of the audio monitor device 1 can be changed from the on state to the off state. To

The number-of-writes (Low) data storage area 92 and the number-of-writes (High) data storage area 91
Is an area for storing the total number of times data has been written in each of the write time difference data storage areas 93,..., And the checksum data storage area 104. The lower eight bits of the total number of times can be written in the data storage area 92 of the write count (Low), and the upper eight bits of the total number of data can be written in the data storage area 91 of the write count. Thus, the total value of the number of times of writing can be stored as binary data of a total of 16 bits.

The write count data stored in these areas is used at the time of maintenance of the audio monitor device 1 such as determining the time of replacement of the non-volatile memory 14 using the total write count value. A checker is connected to the / O unit 15 to read and refer to the count data.

Next, a description will be given of how the CPU 11 stores and uses the input information IN0, and how the information is corrected.

At the time when the power of the audio monitor device 1 is turned off, the first input board section 18a and the second
Whether an input board is mounted on the input board section 18b, and if a board is mounted on these board sections 18a, 18b, an analog signal input board, AE
Determine which of the S / EBU standard board and the SMPTE259M standard board is mounted,
Based on the result of this determination, the A board type data storage area 95 and the B board type data storage area 96 of the nonvolatile memory 14 are rewritten and stored.

When the power supply of the audio monitor device 1 is turned on again, the input boards mounted on the first input board section 18a and the second input board section 18b turn off this power supply. In the data stored in the A board type data storage area 95 and the B board type data storage area 96 of the nonvolatile memory 14, it is determined whether or not the input board boards mounted on the input board sections 18a and 18b are the same. Judge based on.

If the result of this determination is that they are the same, the "source select" command for setting the main selector button and the sub selector button based on the data stored in these areas 97,. ”,“ L
Select "and" R select "data.

If the result of this determination is that they are not the same, the first input board 18
a and the board mounted on the second audio signal input board section 18b become an analog signal input board, an AE
It is determined whether the board is the S / EBU standard board or the SMPTE259M standard board. Based on the data stored in the ROM 12 as default values, predetermined data for the board mounted at this time is determined. Source select, L select and R select data are generated.

In this case, the data stored in the first S selector button setting data storage area 98,... And the second R selector button setting data storage area 103 are not used.

Next, a control procedure performed by the CPU 11 when writing data to the write time difference data storage area 93 will be described with reference to the flowchart shown in FIG.

The control procedure is started by turning on the power of the audio monitor device 1. In step S1, it is confirmed that only the selector button S1 has been operated as shown in FIG. 4A. If not, the control program ends. On the other hand, in step S1, the selector button S1
If it can be confirmed that only one has been operated, the process proceeds to step S2.

In step S2, the selector button S1
It is determined whether or not any of the sub selector buttons other than the selector button S1 is in the operating state, and if any of the sub selector buttons other than the selector button S1 has been operated, this control program is ended. If none of the sub selector buttons other than the source 1 selector button S1 has been operated, the process proceeds to step S3.

The reason that steps 1 and 2 are provided is that the control procedure of step 3 and subsequent steps is executed only when the selector button S1 is operated.
This is for assembling the execution procedure of the PU 11 so as to restrict only a person who has been approved in advance, such as a service person, to execute the control procedure of step 3 and subsequent steps.

In step S3, the selector A button 5
1 and the selector B button 53 are operated, each of these buttons is illuminated to indicate that this operation has been accepted by the CPU 11, and the function of setting the write time difference in the write time difference data storage area 93 is in the operating state. And the process moves to step S4.

In step S4, the write time difference setting data written in the write time difference data storage area 93 is set to 0, and the flow advances to step S5. It should be noted that the time during which the input is accepted after shifting to step S4 is limited to a short time, such as several seconds, and guarding is performed so that only a person who sufficiently knows this function, such as a service person, can operate the function.

In step S5, if there is no problem with the time difference data set to 0 in step S4, the selector A button 51 or selector B button 53 is operated to input that the setting of the time difference setting data has been determined, and the flow proceeds to step S7.

If it is desired in step S5 to set another time difference data other than the time difference data set in step S4 to 0, the process proceeds to step S6 without performing this input, and in step S6 the selector buttons L1,.
‥, selector button L4 and selector button R1, ‥
(4) The selector button R4 is operated, the operated button is turned on, the CPU 11 displays that these operations are accepted, and the process proceeds to step S5.

In this case, the selector button L
The upper four bits of data input operation are assigned to 1, 1,..., L4, and the lower four bits of data input operation are assigned to selector buttons R1,. As an example, by operating the selector button L1 and the selector button R3, binary data corresponding to 65 seconds is set as the time difference data.

In step S5, if there is no problem with the time difference data set in step S6, the selector A button 51
Alternatively, the user operates the selector B button 53 to input that the setting of the time difference setting data has been determined, and then proceeds to step S7.

At step 7, the start flag of the change start flag storage area 94 is set to ON = 1, and the routine goes to step S8.

In step 8, the selector buttons L1,
‥‥, selector button L4 and selector button R1,
‥‥, Step S6 based on the operation of the selector button R4
Calculates the write time difference data set in step S4, or calculates the data input in step S4, and uses the data obtained by these calculations in the write time difference data storage area 9
3 is rewritten, and the routine goes to Step S9.

In step S9, the checksum of the time difference data storage area 102 is calculated, and the calculation result is written and stored in the checksum data storage area 104, and the flow advances to step S10.

In step S10, the number of write operations = the number of write operations + 2 is calculated to obtain data, and the flow advances to step S11. The number of times of writing is data of the number of times of writing that has been written in the data storage area 92 and / or the data storage area 91.

In step 11, the number-of-writes (Low) data storage area 92 and / or the number-of-writes (High) data storage area 91 are rewritten with the number-of-writes data obtained by this operation, and the flow advances to step S12.

Then, in step S12, the start flag in the change start flag storage area 94 is set to off = 0, and the control program is terminated.

Next, referring to the control flow chart shown in FIG. 6, the operation data when each of the main selector button and the sub selector button is operated is stored in the A board type data storage areas 95,. Details of a control procedure by the CPU 11 when inputting and storing in a predetermined area of each of the 2R selector button setting data storage areas 103 will be described.

The control procedure is started by turning on the power supply of the audio monitor apparatus 1. In step S1, the operation states of the buttons constituting the selector A button 51, the selector B button 53 and the sub-selector button are fetched and data new_sw is obtained. Is generated and the process proceeds to step S2.

In step S2, the data “new_
The data “old_sw” and the data “new_sw” already stored in the non-volatile memory 14 before taking in “sw”
sw ”and compares data“ old_sw ”with data“ n ”.
If the contents of “ew_sw” match, the process proceeds to step S5.

On the other hand, if the contents do not match in step S2, data "old_sw" is generated and fetched from data new in step S1.
It is determined that an operation has been performed on at least a part of each of these buttons until _sw is fetched, and the process proceeds to step S3.

In step S3, the data "old_s
w ”is replaced with data“ new_sw ”, and the process proceeds to step S4. In step S4, the count time“ t_tim ”by the timer built in the CPU 11 is changed to“ t_sw ”.
tim = 0 ”and the process proceeds to step S5.

This timer is a one-second timer, and is reset at the timing when the contents of data "old_sw" are rewritten to data "new_sw".

In step S5, the content of data "old_sw" is changed to data "new_sw" in step S4.
The time “t_tim” that is maintained unchanged in the rewritten state after the rewriting is measured by this timer.

The time “t_tim” maintained without being changed in the rewritten state is the data “ol”.
The data “new_sw” obtained by rewriting the content of “d_sw” to data “new_sw” means an elapsed time during which the data “new_sw” is maintained without being rewritten by new data.

Then, step S described with reference to FIG.
8, the write time difference data obtained by the calculation is referred to as “t_n”.
When “um” is set, the “t_num” is compared with the maintained time “t_tim”, and when the maintained time “t_tim” is equal to or greater than the time difference data “t_num”, the process proceeds from step S5 to step S6. .
On the other hand, if the maintained time “t_tim” is shorter than the time difference data “t_num”, the control procedure ends.

In step S6, this data "new"
It is checked whether or not the content of “_sw” is correct, for example, whether or not the amount of data is writable in the write time difference data storage area 93. If the content is correct, the process proceeds to step S7. Ends this control procedure.

In step S7, the data "new_s"
w ”is written and stored in a predetermined data area of the A board type data storage area 95,..., the second R selector button setting data storage area 103, and the process proceeds to step S8.

Then, in step S8, the data "ne
w_sw ”is the A board type data storage area 95,.
After confirming that the data is correctly written and stored in the predetermined data area of the second R selector button setting data storage area 103, the control procedure is terminated.

However, when these steps 7 to 8 are executed, the start flag of the change start flag storage area 94 is set to ON = 1, and then the execution of this step 7 is started, and when the execution of this step 8 is completed. A procedure for setting this start flag to OFF = 0 is provided, and data “new_new_data” is stored in a predetermined data area of the A board type data storage area 95,..., The second R selector button setting data storage area 103.
A procedure is provided for preventing the power supply of the monitor device 1 from being turned off when "sw" is being written.

That is, after the step 6 shown in FIG. 6 is executed, the process goes to the step 7 shown in FIG. 5 to execute the step 7, and the steps 7 and 8 shown in FIG. Then, these steps are executed, and the process returns to step 7 shown in FIG. 5 to execute steps 7 to 12, and then the control procedure shown in FIG. 6 ends.

Next, the reason why the control procedure described with reference to FIG. 6 is provided will be explained with reference to the first input board section 18a and the second input board section 18b in the audio monitor device 1.
Next, as an example, a case where an analog signal input board is mounted and the selector A button 51 or the selector B button 53 is selected to monitor the first signal input line 20a or the second signal input line 20b will be described as an example. I do.

In this case, the selector button S1 is selected, the selector button L1 and the button R2 are selected, and the right (R-
Ch) A first selection state in which an analog audio signal is reproduced from the second speaker 32b and a left (L-Ch) analog audio signal is reproduced from the first speaker 32a is always selected and the first signal input line 20a is selected. Alternatively, it monitors whether an abnormality has occurred in the signal of the second signal input line 20b.

In the state where the first selection state is maintained, the selector button L2 and the selector button R1 are selected instead of the selector button L1 and the selector button R2, and the right (R-Ch) analog audio signal is supplied to the first speaker. 32A, the left (L-Ch) analog audio signal is temporarily switched to the second selection state in which the left (L-Ch) analog audio signal is reproduced from the second speaker 32b, and the right (R-Ch) analog audio signal and the left (L-Ch) The monitor is set to a temporary selection state for checking an abnormality in the localization state of the analog audio signal, and if there is no abnormality, the state is returned to the first selection state, and the audio monitor device 1 is used while maintaining this state.

By the way, the operation data of the buttons constituting the main selector button and the sub selector button selected at the time of turning off the power of the audio monitor device 1 as described above is stored in the A / B selection data. If the data is recorded in the area 97,..., The second R selector button setting data storage area 103, the state is temporarily switched to the second selection state while maintaining the first selection state, and the abnormality is detected. If the power of the audio monitor device 1 is turned off while the check is being performed, the data of the temporarily selected sub selector button in the selected state is recorded in these recording areas.

In this case, when the power of the audio monitor device 1 is switched from the off state to the on state again, the monitoring is performed in the selected state of the temporarily selected sub selector button. It is inconvenient to use the audio monitor device 1 that always uses the first selection state as the selection state.

However, according to the example shown in FIG. 6, the write time difference data storage area 93 is provided in the nonvolatile memory 14, and the A / B selection data storage area 97,.
‥, second R selector button setting data storage area 103
Is not executed unless the time stored in the write time difference data storage area 93 has elapsed since the previous write based on the write time difference data written and stored in the data storage area 93. Therefore, the selection state of the temporarily selected sub selector button is not written in these storage areas. Therefore, such inconvenience in use does not occur in the audio monitor device 1.

Next, referring to FIG. 4B, during maintenance service or the like of the audio monitor 1,
The initialization of the nonvolatile memory 14 and the operation of starting the test of the RAM 13 performed by instructing U11 will be described.

To start the initialization of the nonvolatile memory 14, the selector button S4, the selector button L4 and the selector button R4 are simultaneously operated. By this simultaneous operation, the CPU 11 executes reading of the initialization program of the nonvolatile memory 14 from the ROM 12 and initialization of the nonvolatile memory 14 by the initialization program.

The RAM based on the self-diagnosis program
When starting the diagnosis of No. 13, the operation of the selector button S2 alone is performed. By this operation, RA
The reading of the self-diagnosis program of M13 and the diagnosis of the RAM 13 by the read self-diagnosis program
The PU 11 executes.

In this embodiment, the input board has been described as an example in which the input board is constituted by the two input board sections of the first input board section 18a and the second input board section 18b. Is not limited to the two, and may be constituted by one, or may be constituted by three or more input boards. In these cases, the number of input boards and the selector A constituting the main selector button The number of buttons 51 and selector B buttons 53 and the A board type data storage areas 95,.
May be increased or decreased.

In this example, the SMPTE / IEEE
The example in which the processing board conforming to the SMPTE259M standard is used as the E standard board has been described.
IEEE13 instead of processing board compliant with 9M standard
A processing board conforming to the 94 standard may be used.

In this example, the types of input signals handled by the audio monitor device 1 are two-channel analog audio signals, AES / EBU standard two-channel digital audio signals, and SMPTE259M standard 4 ×.
Although described as three types of four-channel digital audio signals, the present invention is not limited to an audio monitor device using these three types of boards, and the present invention is applied to an audio monitor device using more types of boards. May be applied.

In the present embodiment, a method of inputting in the form of a binary signal using a part of the sub selector button is employed as data writing means for the writing time difference data storage area 93, but in the present invention, this method is employed. The input-only switch means, for example, a dip switch may be provided at a position where only the service person knows the installation position such as the back side of the audio monitor device, and the set radix is limited to a binary number. It may be a decimal number or a hexadecimal number without being performed.

Further, in the present invention, a specific number of seconds, such as 1 second, 5 seconds, 10 seconds, 15 seconds, and ‥‥, is assigned to each of the sub selector buttons, and the sub selectors thus assigned are assigned. The write time difference data of a predetermined number of seconds may be written in the write time difference data storage area 93 by an operation in which the selector button is combined.

In this example, the first signal input line 20a has only one first input board 18a, and the second signal input line 20b has one second input board 18b. Only one of these boards is prepared, and one of these three types of boards is
b, when another board is mounted here, the mounted board is detached and then mounted so that the board conforms to the standard of the audio signal monitored by the audio monitor device 1. The case where the selection is set is described above.

However, in the present invention, the number of the first input board section 18a and the number of the second input board section 18b are not limited to one, and the first input board section 18a and the second input board section 18b are mounted on the input board section 18a and the input board section 18b. As many input board sections 18a and 18b as the input board sections 18a and 18b are provided to correspond to the number of audio signal types that are or may be input to the monitor device 1. The selection of the input board section 18a and the input board section 18b composed of a plurality of these can be performed by executing the program stored in the ROM 12 by the CPU 1
1, the selection may be set in accordance with the standard of the audio signal monitored by the audio monitor device 1.

In this embodiment, the board selected by the first input board section 18a and the second input board section 18b is described as an example in which the boards of the same standard are mutually selected. Is not limited to such a selection, the board selected on the first input board section 18a side is an AES / EBU standard board, and the board selected on the second input board section 18b is an SMPTE25.
The first input board unit 18a and the second input board unit 18b may select boards of different standards, such as a 9M standard board.

[0134]

According to the present invention, in an audio monitor apparatus for monitoring an audio signal, a selection according to the audio signal standard to be monitored by the audio monitor apparatus is selected from a plurality of types of audio signals having different audio signal standards. Is provided, a plurality of types of audio signals having different audio signal standards can be monitored.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a circuit configuration of an audio monitor device according to the present invention.

FIG. 2A is a front view showing a main part of a panel unit of the audio monitor device of the present invention. FIG. 2B is a front view showing a selector operation panel provided on the panel unit shown in FIG. 2A.

FIG. 3A is a diagram showing a list of functions of a selector operation panel shown in FIG. 2B; B is a diagram showing a list of data types of the audio signal input board.

FIG. 4A is a diagram showing a list of memory areas of the nonvolatile memory 14; B is a diagram showing a list of other functions of the selector operation panel shown in FIG. 2B.

FIG. 5 is a flowchart showing details of a control procedure by a CPU 11;

FIG. 6 is a flowchart showing details of another control procedure by the CPU 11;

[Explanation of symbols]

1 audio monitor device, 10 control unit, 11
{CPU, 12} ROM, 13 {RAM, 14}
Nonvolatile memory, 17 、 audio signal selector,
18a ‥‥ first input board section, 18b ‥‥ second audio signal input board section, 20a ‥‥ first signal input line, 20b ‥‥ second signal input line, 21a ‥‥ first signal output Line, 21b ‥‥ second signal output line, 32a ‥‥ first speaker, 32b ‥‥ second speaker

Continued on the front page (72) Inventor Yoshihiro Komai 6-35 Kita Shinagawa, Shinagawa-ku, Tokyo Sony Corporation F-term (reference) 5D062 DD04 5K068 AA00 BA01 BC01 BC02 BC05 CB35

Claims (7)

[Claims] 1. An audio monitor device for monitoring a plurality of types of audio signals having different audio signal standards, wherein the audio monitor device monitors the plurality of types of audio signals having different audio signal standards from each other. An audio monitor device comprising: means for setting a selection state according to a signal standard. 2. An audio monitor device for monitoring a plurality of types of audio signals having different audio signal standards, wherein the audio monitor device monitors the plurality of types of audio signals having different audio signal standards from each other. An audio monitor device comprising: means for setting a selection state in accordance with a signal standard; and non-volatile storage means for storing the selection content selected by said means. 3. An audio monitor device for monitoring a plurality of types of audio signals having different audio signal standards, wherein the audio monitor device monitors the plurality of types of audio signals having different audio signal standards. A first means for selectively extracting a standard audio signal; and a second means for selecting an audio channel to be supplied to an audio monitoring means from the audio signal extracted by the first means. Audio monitor device. 4. An audio monitor device for monitoring a plurality of types of audio signals having different audio signal standards, wherein the audio monitor device monitors the plurality of types of audio signals having different audio signal standards. First means for selectively extracting a standard audio signal, second means for selecting an audio channel to be supplied to audio monitoring means from the audio signal extracted by the first means, and the first means The audio signal standard of an audio signal selectively extracted from a plurality of types of audio signals having different audio signal standards and an audio channel to be supplied to the audio monitoring unit selected by the second unit are stored. An audio monitor device comprising a nonvolatile storage unit. 5. The audio monitoring apparatus according to claim 2, wherein the setting means for setting the selection state can be set based on the storage of the nonvolatile storage means when the audio monitoring apparatus is restarted. . 6. The apparatus according to claim 4, wherein said first means and said second means can be set based on the storage of said nonvolatile storage means when the audio monitor device is restarted. Audio monitor device. 7. An audio monitor apparatus for monitoring a plurality of types of audio signals having different audio signal standards from each other, wherein the audio signal standard is converted from a signal obtained by combining a plurality of types of audio signals having different audio signal standards. Selecting means for selectively extracting an audio signal of a standard to be monitored by the audio monitor device among a plurality of types of audio signals different from each other, and a plurality of types of audio signals having different audio signal standards by the means. Non-volatile storage means for storing the audio signal standard of the audio signal selectively extracted from the audio signals; and a selection time for selecting the audio signal of the standard to be monitored by the audio monitor device by the selection means. Measuring means, and the time measured by the measuring means reaches a predetermined time. The audio monitor device is characterized in that the selection status is stored in the non-volatile storage means when the selection is made.