JP2006039299A - Sound pressure frequency characteristic adjusting device, karaoke machine, and information communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly adjust sound pressure characteristics according to the size of a room and the number of persons in the room although the constitution is simple. <P>SOLUTION: A room entry/exiting managing device 50 informs a corresponding karaoke machine 1 of the number of persons in the room which is obtained through room entry processing through a LAN. The karaoke machine 1 reads a target gain value corresponding to the maximum number of room users and the number of persons in the room reported from the room entry/exiting managing device 50 out of a target gain value table stored in a hard disk storage device 14 and adjusts the gain value of an equalizer 25 on the basis of the read-out target gain value. In the target gain value table, target gain values are set corresponding to sizes of rooms (one-user room, two-user room, ..., on the basis of the maximum number of room users) and the numbers of persons in the rooms. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for adjusting a sound pressure frequency characteristic in a reproduction sound field.

As a technique for obtaining a good reproduction sound field, Patent Document 1 discloses the following sound reproduction apparatus. In other words, the output from the playback device is output to the main sound source by the main sound source amplifying device, and simultaneously input to the control means to control the phase, amplitude, and frequency component, and then amplified by the sub sound source amplifying device to By outputting to a sound source, the generation of standing waves is suppressed and an acoustically superior sound field is formed. In this case, the load on the floor, the body temperature of the listener, and the like are detected, the listening point (listening point) is specified based on them, and an optimal sound field is formed at the listening point.
Japanese Unexamined Patent Publication No. 7-75193

However, in the sound reproducing apparatus described above, a sub sound source must be prepared separately from the main sound source, which complicates the configuration and increases costs.
In addition, the idea of detecting where the listener is in the room and creating an optimal sound field at the listening point has been proposed, but it depends on the size of the room and the number of people in the room (number of people entering the room). Not paying attention. That is, the output to the main sound source and the sub sound source is determined regardless of the size of the room and the number of people entering the room. The appropriate sound pressure frequency characteristic varies depending on the size of the room, and the appropriate sound pressure frequency characteristic varies depending on the number of people entering the room. This is because when two types of media, the human body and the air, are considered, the speed of sound in these media is different (see, for example, the URL below).

http://www.us-image.org/Online_WS/kisokouza/us_kiso/us_kiso3.html
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to realize an appropriate adjustment of sound pressure frequency characteristics according to the size of a room and the number of people entering the room, while having a simple configuration.

  The sound pressure frequency characteristic adjusting device of the present invention made to solve the above-described problems is an equalizer that can change the gain value to change the sound pressure frequency characteristic in the reproduction sound field, and adjusts the gain value of the equalizer. Gain value adjusting means, target gain value storage means for storing a gain (= target gain value) for specifying a plurality of target sound pressure frequency characteristics set in accordance with the maximum capacity and number of people in the room, Maximum number of people storage means for storing the maximum number of people in the room where the own device exists, and number of people identification information acquisition means for obtaining information for specifying the number of people who actually entered the room where the own device exists. I have. Since the size of the room generally corresponds to the maximum capacity, the target gain value can be set by, for example, measuring in advance in a standard room corresponding to the maximum capacity on the side where the target gain value is set. It is possible to keep it. Then, actual measurement or the like may be performed while changing the number of people entering from 1 to the maximum number of people, and a target gain value corresponding to the maximum number of people in the room and the number of people entering the room may be set. It is only necessary to store the correspondence between the maximum accommodation number and the number of people entering the room and the target gain value in the target gain value storage means.

  Then, the gain value adjusting means outputs the target gain value corresponding to the maximum number of persons stored in the maximum number of persons storage means and the number of persons entering the room specified by the specific information acquired by the number-of-rooms specifying information acquisition means. And the equalizer gain value is adjusted based on the read target gain value. By doing in this way, according to the sound pressure frequency characteristic adjusting device of the present invention, it is not necessary to prepare a sub sound source separately from the main sound source unlike the sound reproducing device disclosed in the prior art, and it becomes a simple configuration. . Nevertheless, it is possible to realize appropriate adjustment of the sound pressure frequency characteristics according to the size of the room and the number of people entering the room.

  Such a sound pressure frequency characteristic adjusting device can be applied to various music reproducing devices. However, for example, as shown in claim 2, it is very useful when applied to a karaoke device. Considering the case where a karaoke device is installed in a karaoke box, there are often multiple types of maximum capacity in each room. In other words, it is important for business to prepare an appropriate room according to the number of users. However, since the number of users is not always the maximum number of people, the actual number of people entering the room is often less than the maximum number of people. For example, even in a group of 2 to 3 people, if there is no other suitable room, for example, a room with a maximum capacity of 10 people may be used. Therefore, with the karaoke apparatus of the present invention, it is possible to enjoy karaoke in a state where appropriate sound pressure frequency characteristics are adjusted according to the size of the room and the number of people in the room, and to improve user satisfaction. Can do.

Since there are various methods for obtaining the number of people entering the room, some examples will be given below.
(1) In the case of the karaoke apparatus according to claim 3, information can be communicated with an entrance / exit management apparatus for performing management related to entrance / exit including the management of the number of users for each room where the karaoke apparatus exists. It is configured. The room entry number specifying information acquisition means acquires information for specifying the actual number of people entering the room where the own karaoke device exists from the room entry / exit management device. In the case of a karaoke shop where there are multiple rooms with karaoke equipment, an entrance / exit management device is placed at the visitor counter, etc., and the usage status of each karaoke shop room, the number of people entering the room, the remaining usage time, and the food and beverages provided to each room In many cases, the total value of items such as goods is managed. For example, when there is a new visitor, the store clerk searches for a vacancy, and when there is a vacancy, the number of people entering the room is input as the store entry process. In addition, when a food and drink order is received from a user, an order history may be input to this terminal and used for payment of the usage fee when leaving the room. Therefore, in the karaoke apparatus, the number of entering rooms can be easily grasped by having the entering / leaving room management apparatus provide the number of entering rooms entered for such management.

  (2) In the case of the karaoke device according to the fourth aspect, the karaoke device includes an approaching number detecting means for detecting the number of people who have entered the room where the karaoke device exists. For example, it is conceivable to detect the number of people who have passed through a passage leading to the room or the entrance of the room by a CdS cell (photoconductive element mainly composed of cadmium sulfide), an infrared sensor, an ultrasonic sensor, or the like shown in the embodiment. The room entry number specifying information acquisition unit acquires information for specifying the number of people entering based on the number of persons entered by the entry number detection unit.

(3) In the case of the karaoke apparatus according to the fifth aspect of the present invention, the karaoke apparatus includes presence number detecting means for detecting the number of persons existing in the room based on the captured video in the room where the karaoke apparatus is installed. An object that looks like a human being is detected by pattern matching or the like based on the captured image.
The room entry number specifying information acquisition unit acquires information for specifying the number of people entering the room based on the number of people detected by the existing number of people detection unit disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-175868.

  (4) In the case of the karaoke apparatus according to the sixth aspect, the karaoke apparatus itself includes reception means capable of receiving various inputs from the user including the number of users. For example, an operation panel or a remote control. The room entry number specifying information acquisition unit acquires the number of users accepted by the reception unit as information for specifying the number of people entering the room.

  The characteristics of the methods (1) to (4) described above will be briefly summarized. In the case of the methods (1) to (3), it is possible to obtain information for specifying the number of people entering without the user's operation. However, in the case of the method (4), it is assumed that the user operates. Therefore, the methods (1) to (3) are preferable in terms of reducing the burden on the user. On the other hand, from the viewpoint of more accurate number of people entering the room, the one based on the manual work like (1) or (4) is preferable. This is because, in the case of the methods (2) and (3), since the estimation detection is only performed, an error may occur. In the case of the method (4), for example, a clerk of a karaoke shop may go to the room and input the number of people entering the room through the receiving means, thereby realizing a reduction in the burden on the user. However, if such an operation occurs, it is more efficient to perform intensive management in the entrance / exit management device as in (1).

  An information communication system according to claim 7 includes the karaoke device according to any one of claims 2 to 6 and a distribution host device, and the distribution host device and the karaoke device communicate with each other via a communication line. It is configured to be possible. The distribution host device includes distribution control means for distributing the target gain value to the karaoke apparatus, and the gain value adjustment means of the karaoke apparatus is based on the target gain value distributed from the distribution host apparatus. Adjust the gain value.

  When the target gain value is distributed from the distribution host device in this way, for example, if the information communication system has tens of thousands of terminal devices connected to one distribution host device, the effect is remarkable. Is obtained. In other words, the target gain value stored in the target gain value storage means is set according to the maximum capacity of the room and the number of persons entering the room. This is very convenient because it can be handled immediately if it is distributed from the distribution host device to each karaoke device.

  As a communication line between the distribution host device and the karaoke device, a public switched telephone network (PSTN) or the Internet can be used. When constructing such a communication system between a host and a terminal, a method called host call / terminal call is conceivable. In the present invention, a system for calling from either a host or a terminal is adopted. However, as long as the target gain value can be distributed, the adjustment work is completed in the terminal device, and the adjustment work can be executed at an arbitrary timing on the terminal device side.

  When the gain value adjusting means provided in the sound pressure frequency characteristic adjusting device is realized by a computer, as described in claim 8, it is also regarded as an invention as a program executed by the computer provided in the sound pressure frequency characteristic adjusting device. be able to. Such a program is recorded on a computer-readable recording medium such as a flexible disk, a magneto-optical disk, a CD-ROM, a hard disk, a ROM, or a RAM, and is loaded into a computer for execution as necessary. These functions as each means can be realized by loading and executing the program.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
FIG. 1 is a block diagram showing a configuration of a communication karaoke system as an information communication system including the karaoke apparatus of the first embodiment.

  In the communication karaoke system of the present embodiment, the karaoke device 1 as a communication terminal and the distribution host device 100 are connected via a general public network (PSTN) or the Internet 90, and the karaoke device 1 is connected from the distribution host device 100. It is configured to distribute various types of information. The karaoke device 1 and the distribution host device 100 may be connected via the Internet. Although only one karaoke device 1 is shown in FIG. 1, naturally a large number (for example, tens of thousands of karaoke devices) of karaoke devices 1 are connected.

  The distribution host device 100 includes a CPU 101, a ROM 102, a RAM 103, a hard disk storage device (HDD) 104, a communication control unit 105, and the like that control the operation of the entire device. A hard disk storage device (HDD) 104 stores song data and target gain values to be distributed to the karaoke apparatus 1. This target gain value will be described in detail later. The communication control unit 105 is connected to the karaoke apparatus 1 via a general public line network or the Internet 90.

  Moreover, the karaoke apparatus 1 is connected with the entrance / exit management apparatus 50 via LAN. The entrance / exit management device 50 includes a CPU 51, a ROM 52, a RAM 53, a hard disk storage device (HDD) 54, a NIC (Network Interface Card) 55, and the like that control the operation of the entire device, and a monitor 60 and an input device 65 are connected. Has been. The entrance / exit management device 50 is installed at a customer counter of a karaoke store and manages the usage status of each room of the karaoke store, the number of people entering the room, the remaining usage time, and the total price of food and drink provided to each room. It also functions as a so-called POS (Point Of Sales) terminal. For example, when there is a new visitor, the store clerk searches for a vacancy, and when there is a vacancy, the number of people entering the room is input as the store entry process. Further, when an order for food and drink is received from a user, an order history may be input to the entrance / exit management device 50 and used for payment of the usage fee when leaving the room. Information about each room is stored in the hard disk storage device 54. Therefore, in the karaoke apparatus 1, the number of entering rooms can be easily grasped by having the entering / leaving room management apparatus 50 provide the number of entering rooms for such management. In addition, when a plurality of karaoke apparatuses 1 exist in the karaoke store, the entrance / exit management of the plurality of karaoke apparatuses 1 is performed by one entrance / exit management apparatus 50. Therefore, a plurality of karaoke apparatuses 1 are connected to one entrance / exit management apparatus 50.

On the other hand, the karaoke apparatus 1 is roughly provided with a main control unit 10 and a voice processing unit 20.
(Configuration of main control unit 10)
In the main control unit 10, a modem 12, a RAM 13, a hard disk storage device (HDD) 14, an operation panel 15, and a video processing unit 16 are connected to a CPU 11 that controls the operation of the entire main control unit 10 via a bus.

The modem 12 is connected to the distribution host device 100 via a general public line network or the Internet 90.
The hard disk storage device 14 stores a system program, an application program, and the like that control the operation of the karaoke device 1. When the karaoke device 1 is turned on and a startup program is executed, these programs are stored in the RAM 13. Is read. The hard disk storage device 14 includes an area for storing song data for performing karaoke performance, an area for storing a target gain value, and the like in addition to the above-described area for storing the program.

The target gain value is distributed from the distribution host device 100 described above. As shown in the table of FIG. 2, the target gain value is the size of a room (here, a single room, a double room, a triple room, a quadruple room, etc. based on the maximum capacity) and the number of people entering the room. (Only 1 person in a 1 person room, 2 patterns in the case of 1 person and 2 persons in a 2 person room, 1 person, 2 persons and 3 persons in a 3 person room In the case of a four-person room, four patterns for one person, two persons, three persons, and four persons are set. Specifically, it is as follows.
In the case of one person and one person in the room ... Target gain value file: hosei1-1.prm
In a 2-person room with 1 person in the room ... Target gain value file: hosei2-1.prm
In a 2-person room with 2 people in the room ... Target gain file: hosei2-2.prm
In the case of a 3-person room with 1 person in the room… Target gain value file: hosei3-1.prm
In the case of 3 people and 2 people in the room ... Target gain value file: hosei3-2.prm
In case of 3 people and 3 people in the room ... Target gain value file: hosei3-3.prm
In the case of a 4-person room with 1 person in the room… Target gain value file: hosei4-1.prm
In the case of a quadruple room and 2 people in the room… Target gain value file: hosei4-2.prm
In case of 4 people and 3 people in the room ... Target gain value file: hosei4-3.prm
In the case of 4 people and 4 people in the room ... Target gain value file: hosei4-4.prm
Note that the same setting is applied to the case of five or more rooms.

  The operation panel 15 is provided on the front surface of the karaoke apparatus 1 and includes a song code input switch, a key change switch, or a 7-segment LED for displaying an input song code or the like.

  The video processing unit 16 combines the lyrics data with the background video data included in the song data or separately stored in the hard disk storage device 14 and displays the synthesized lyrics data on the monitor 30. Of course, other contents can be displayed.

(Configuration of the audio processing unit 20)
The audio processing unit 20 includes a CPU 21 that controls the operation of the entire audio processing unit 20, a ROM 22, a RAM 23, a sound source unit 24, a 15-band equalizer (hereinafter simply referred to as an equalizer) 25, and a voice effect unit 26 via a bus. It is connected.

  The CPU 21 of the audio processing unit 20 and the CPU 11 of the main control unit 10 are connected by USB (Universal Serial Bus). Therefore, the target gain value stored in the hard disk storage device 14 of the main control unit 10 is acquired via the CPU 11 of the main control unit 10 and stored in the RAM 23 in the processing described later. The ROM 22 stores an application program for controlling the operation of the sound processing unit 20.

  The tone generator 24 forms a (digital) tone signal based on the tone track data of the song data. The song data is read from the hard disk storage device 14 by the CPU 21 of the voice processing unit 20 via the CPU 11 of the main control unit 10 during karaoke performance. The tone track is composed of a plurality of tracks, and the tone generator 24 forms a plurality of part tone signals simultaneously based on this data. The musical sound signal formed by the sound source unit 24 is karaoke performance sound, and these are input to the equalizer 25. The equalizer 25 gives a predetermined acoustic effect to the karaoke performance sound. Specifically, the equalizer 25 divides the frequency band of 20 Hz to 20 kHz into 15 bands, and the sound of each frequency band. The gain value with respect to the pressure is changed in the range of −12 dB to +12 dB. The (digital) musical sound signal whose sound pressure frequency characteristic has been changed by the equalizer 25 is converted into an analog signal via a DA converter (not shown), mixed with a singing voice signal to be described later, and output to the speaker 40 which is an external device. Is done.

  On the other hand, a singing voice signal or sound signal input from a singing microphone 50 which is an external device is amplified by a microphone amplifier (not shown) and converted into a digital signal via an AD converter (not shown) to obtain a voice effect. Input to the unit 26. The voice effect unit 26 gives an acoustic effect such as echo to the singing voice signal and outputs it. The singing voice signal output from the voice effect unit 26 is mixed with the musical sound signal and output to the speaker 40 as described above.

(Explanation of target gain value)
In the communication karaoke system of this embodiment, not only can the karaoke performance be performed in the karaoke apparatus 1, but also the sound pressure frequency characteristics can be adjusted according to the size of the room (maximum capacity) and the number of people entering the room. First, the necessity for such adjustment of the sound pressure frequency characteristic will be briefly described.

  In the online karaoke system, the actual situation is that the environment in which the karaoke apparatus 1 is installed to reproduce and play music data is not uniform. Even if it is a karaoke box (room), the size of the room is different. Furthermore, the number of people entering the room is also case-by-case. For example, even in a group of 2 to 3 people, if there is no other suitable room, for example, a room with a maximum capacity of 10 people may be used. . The appropriate sound pressure frequency characteristic varies depending on the size of the room, and the appropriate sound pressure frequency characteristic varies depending on the number of people entering the room. In the above example, appropriate sound pressure frequency characteristics are different between the case where there are only 2 to 3 people in a 10-person room and the case where there are 10 people. This is because when two types of media, the human body and the air, are considered, the sound speeds in these media are different.

  Therefore, as shown in the table of FIG. 2, a target gain value is set in advance corresponding to the size of the room and the number of people entering the room, and the target corresponding to the size of the room where the karaoke performance is actually performed and the number of people entering the room. The sound pressure frequency characteristic is adjusted using the gain value. The target gain value may be determined, for example, by the data producer who produces the song data. For example, the target gain value is set in advance by actually measuring in a standard room corresponding to the maximum capacity. Specifically, in a room with a maximum capacity of 1, 2, 3, etc., the actual number of people is changed from 1 to the maximum capacity, and the target according to the maximum capacity and the number of people in the room. Set the gain value. In actual measurement, pink noise (reference audio signal) is output, input by a microphone, and frequency analysis (FFT) is performed, and the frequency band of 20 to 20 kHz is set to 15 in the same manner as the 15 frequency bands of the equalizer 25. The frequency is divided into bands and further adjusted and set based on the data obtained by analyzing the sound pressure in each frequency band. In actual measurement, measurement is performed by outputting a simple sound signal such as pink noise, but the karaoke accompaniment sound output by an actual karaoke apparatus is a considerably complicated sound signal. For this reason, for example, if there is a target sound pressure frequency characteristic that is considered more appropriate on the creator side of the karaoke music piece, it is preferable to set a gain value suitable for the target sound pressure frequency characteristic.

  In this way, the target gain value is set in advance corresponding to the size of the room and the number of people entering the room. Therefore, the target gain value is tabulated as shown in FIG. 2, and is distributed from the distribution host device 100 to each karaoke device 1. Deliver to In each karaoke device 1, the size of the room where the karaoke device 1 is actually installed is stored in the hard disk storage device 14. This may be stored by operating the operation panel 15 or the like by the person who sets the karaoke apparatus 1. Then, when a notification of the number of people entering the room is received from the entrance / exit management device 50, the size of the room and the number of people entering the room are determined, so that the corresponding target gain value is read and set as the gain value in the equalizer 25.

(Explanation of operation related to adjustment of sound pressure frequency characteristics)
Next, the operation | movement which concerns on adjustment of the sound pressure frequency characteristic performed with the communication karaoke system of this embodiment is demonstrated.

  FIG. 3 is a flowchart showing a process related to the adjustment of the sound pressure frequency characteristic executed by the karaoke apparatus 1, and FIG. 4 is a flowchart showing a process executed by the entrance / exit management apparatus 50.

  As shown in FIG. 3, in the karaoke apparatus 1, it is determined whether or not there is a notification of the number of persons entering the room from the entry / exit management apparatus 50 (S 10). If there is no notification of the number of people entering the room (S10: NO), the determination in S10 is performed until the notification is received.

  Here, with reference to FIG. 4, the process regarding the notification of the number of people in the room management device 50 will be described. The entrance / exit management device 50 determines whether or not the number of people entering the room has been input via the input device 65 (S110). An input to the input device 65 is performed by a person. For example, when there is a new visitor, the store clerk searches for a vacancy, and when there is a vacancy, the number of people entering the room is input as the store entry process. If there is no input of the number of people entering the room (S110: NO), the determination in S110 is performed until there is an input, and if there is an input of the number of people in the room (S110: YES), it is determined whether or not it is an additional store entry (S120). . When entering the number of people in the input device 65, it is possible to distinguish whether it is a new entry or an additional entry, and if it is not an additional entry, that is, a new entry (S120: NO) The number of people entering the room is registered in the hard disk storage device 54 (S130).

  When this registration is completed, the IP address of the karaoke apparatus 1 corresponding to the room number of the room entry destination is read (S160), and the number of persons entering the room is notified to the corresponding karaoke apparatus 1 (S170). The hard disk storage device 54 also stores an IP address for each karaoke device 1 corresponding to the room number.

  On the other hand, in the case of an additional entry (S120: YES), the current number of people entering the room stored in the hard disk storage device 54 is read (S140), and the number of people who entered the room is added (S150). Thereafter, the processes of S160 and S170 described above are executed. Accordingly, in S170, the total number of people entering the room including those who have additionally entered the store is notified.

  Returning to the description of the processing in the karaoke apparatus 1 in FIG. 3, if there is a notification of the number of persons entering the room (that is, S <b> 170 in FIG. 4) from the entrance / exit management apparatus 50 (S <b> 10: YES), it is stored in the hard disk storage device 14. The maximum accommodated number is read (S20). Then, based on the maximum accommodation number read out in S20 (that is, the number of persons in the room in FIG. 2) and the number of persons entering the room notified from the entry / exit management device 50, the corresponding target gain value in FIG. A file is determined (S30). The determined target gain value is set in the equalizer 25 (S40).

By executing the processing as described above, the gain value in the equalizer 25 can be changed (adjusted) to a value according to the size of the room and the number of people entering the room.
(Description of operation when receiving distribution of song data and target gain value data)
Next, the operation when the karaoke apparatus 1 distributes the data file including the song data and the target gain value from the distribution host apparatus 100 in the communication karaoke system of the present embodiment will be described.

  In this embodiment, when the distribution host device 100 distributes the song data to the karaoke device 1, the target gain value is also distributed. The distribution pattern includes a pattern in which the song data is distributed after distributing the target gain value, a pattern in which the target gain value is distributed after distributing the song data, and the distribution host device 100 stores the song data and the target gain value in one data file. And the song data and the target gain value are simultaneously distributed to the karaoke apparatus 1, and the karaoke apparatus 1 can consider three patterns of dividing the song data and the target gain value from the data file.

The distribution may be a terminal call or a host call.
The general operation in the case of the terminal call type is as follows. The karaoke device 1 determines whether or not a predetermined time programmed in advance as a time to download from the distribution host device 100 is reached, and when the download time is reached, a call is made to the distribution host device 100. Establish a connection. Then, the distribution host device 100 transmits the file list held in the hard disk storage device 104 to the karaoke device 1, and the karaoke device 1 checks the karaoke device 1 in order from the first file name in the file list. If it is not held in the hard disk storage device 14, the distribution host device 100 is requested to distribute the corresponding file. The distribution host device 100 transmits the file requested from the karaoke device 1 to the karaoke device 1.

  On the other hand, the general operation in the case of the host call type is as follows. The distribution host device 100 determines in advance whether or not a predetermined time programmed as a time to be distributed to the karaoke device 1 has been reached, and when the distribution time has come, the karaoke device 1 to be distributed is specified. With reference to the terminal list, terminal information (in this case, serial number + telephone number) is acquired in order from the top of the terminal list, and a call is established to the corresponding karaoke apparatus 1 to establish a connection. When the connection with the karaoke device 1 is established in S740, the distribution host device 100 transmits the file list held in the hard disk storage device 104 to the karaoke device 1. In the karaoke device 1, the file list transmitted from the distribution host device 100 is received, checked in order from the first file name in the file list, and if not stored in the hard disk storage device 14 of the karaoke device 1, The distribution host device 100 is requested to distribute the corresponding file. The distribution host device 100 transmits the file requested from the karaoke device 1 to the karaoke device 1.

(Effect of 1st Embodiment)
Each karaoke device 1 reads out the target gain value corresponding to the maximum number of people stored in the hard disk storage device 14 and the number of people entering the room notified from the entrance / exit management device 50 from the target gain value table shown in FIG. The gain value of the equalizer 25 is adjusted based on the read target gain value. By doing so, it is not necessary to prepare a sub sound source separately from the main sound source as in the sound reproducing device disclosed in the prior art, and the configuration becomes simple. Nevertheless, it is possible to realize appropriate adjustment of the sound pressure frequency characteristics according to the size of the room and the number of people entering the room.

  Moreover, in the case of this embodiment, since it implement | achieves as the karaoke apparatus 1, it is very useful. Considering the case where the karaoke apparatus 1 is installed in a karaoke box, there are often a plurality of types of maximum capacity in each room. In other words, it is important for business to prepare an appropriate room according to the number of users. However, since the number of users is not always the maximum number of people, the actual number of people entering the room is often less than the maximum number of people. For example, even in a group of 2 to 3 people, if there is no other suitable room, for example, a room with a maximum capacity of 10 people may be used. Therefore, with this karaoke apparatus 1, karaoke can be enjoyed in a state where the sound pressure frequency characteristics are appropriately adjusted according to the size of the room and the number of people in the room, and the satisfaction of the user can be improved. it can.

The target gain value is a gain value for specifying a “recommended” sound pressure frequency characteristic, which the creator of the karaoke music thinks is “preferably such a sound pressure frequency characteristic”. Therefore, the target gain value once determined may be changed by subsequent examination. Even in such a case, if the target gain value after the change is distributed from the distribution host device 100 to the karaoke device 1, the gain value adjustment is executed in each karaoke device 1, which is very convenient. .
[Second Embodiment]
In the first embodiment, the number of people entering the room notified to the karaoke apparatus 1 is detected by human intervention. In other words, the manager of the karaoke box (such as reception staff) grasps the number of people entering the room and inputs it to the room entry / exit management device 50 via the input device 65. However, it is possible to automatically detect the number of people entering the room. A specific example in that case will be described with reference to FIG.

As a configuration for automatically detecting the number of people entering the room, a light emitting unit 70 and a light receiving unit 80 are used as shown in FIG. The light receiving unit 80 is connected to the entrance / exit management device 50.
As shown in FIG. 5B, the light emitting unit 70 includes a power source and a light emitter, and the light receiving unit 80 includes a power source, a CdS cell (a photoconductive element mainly composed of cadmium sulfide), a comparator, and a counter. Yes. As shown in FIG. 5 (b), the light emitting unit 70 and the light receiving unit 80 are configured such that the karaoke box manager registers the entrance / exit management device 50 for registering karaoke users and the room for karaoke. Located in the passage between. The light emitter of the light emitting unit 70 and the CdS cell of the light receiving unit 80 are disposed facing each other across the passage. And when a user passes between the light emission part 70 and the light-receiving part 80, it arrange | positions so that the path | route which the light radiated | emitted from the light-emitting body of the light emission part 70 may input into the CdS cell of the light-receiving part 80 may be interrupted | blocked. ing.

  The entrance / exit management device 50 includes a room input switch 58. A signal indicating the on / off state of the room input switch 58 is output to a counter of the light receiving unit 80, and an output (counter value) from the counter is It is configured to be output to the entrance / exit management device 50.

With such a configuration, the number of people entering the room is detected and notified as follows.
When an administrator registers a karaoke user (for example, four users A to D) into the entrance / exit management device 50 using the force device 65 (see FIG. 5), entrance / exit management is performed. The device 50 turns the room input switch 58 from on to off. The room input ON signal is output to the counter of the light receiving unit 80. When the room input ON signal is input, the light receiving unit 80 starts a detection operation. When the room input switch 58 is turned off from on and a room input off signal is input, the light receiving unit 80 ends the detection operation. When the room input ON signal is input, the counter / latch circuit of the light receiving unit 80 is turned OFF, and while the room input ON signal is input, the counter counts the number of input pulse signals from the comparator. After the room input ON signal is input and the light receiving unit 80 starts the detection operation, when the users A to D sequentially pass between the light emitting unit 70 and the light receiving unit 80, the passage is detected. The detection operation will be specifically described.

  Before the user passes between the light emitting unit 70 and the light receiving unit 80, the light of the light emitter of the light emitting unit 70 reaches the CdS cell of the light receiving unit 80, and the resistance value of the CdS cell is minimum. When the users A to D start passing between the light emitting unit 70 and the light receiving unit 80, light from the light emitter of the light emitting unit 70 is blocked by the user and does not reach the CdS cell of the light receiving unit 80. Then, as the amount of light incident on the CdS cell decreases from the maximum, the resistance value of the CdS cell increases, and when the light is blocked, the resistance value of the CdS cell becomes maximum.

  Since the voltage dividing ratio of the resistors R100 and R101 is determined in advance so that the intermediate value between the maximum value and the minimum value of the CdS cell resistance value becomes the threshold value of the comparator, the maximum light reception from the light emitter to the CdS cell When the resistance value of the CdS cell is changed from the minimum value to the maximum value, the output logic of the comparator changes from 0 to 1 level, and when the user passes, the light emitter is transferred to the CdS cell again. The light reception becomes maximum from the cutoff, the resistance value of the CdS cell changes from the maximum value to the minimum value, and the output logic of the comparator changes from 1 to 0. The change of the comparator output logic 0 → 1 → 0 is defined as a pulse of quantity 1.

  The counter counts the number of pulses from the comparator while the room input on / off signal changes from off to on to off, and the counter value when the change in the room input on / off signal from on to off is detected. And the counter value is output to the entrance / exit management device 50.

FIG. 6 shows signal states and counter values when four users A to D sequentially pass between the light emitting unit 70 and the light receiving unit 80 after the room input on / off signal changes from off to on. Showed changes. The comparator outputs the pulse four times, and the counter counts the pulse quantity 4. When the administrator confirms that all the users have entered the karaoke room, the store registration completion operation is performed via the input device 65. Then, the room input switch 58 is turned from on to off, and a room input off signal is output to the light receiving unit 80, whereby the counter of the light receiving unit 80 notifies the entrance / exit management device 50 of the counter value 4. As a result, the entrance / exit management device 50 determines that four users have entered the room, reads the IP address of the karaoke device 1 corresponding to the room number of the entry destination, and sends it to the corresponding karaoke device 1. Notify the number of people entering the room.
[Third Embodiment]
In the second embodiment, the number of people entering the room is automatically detected, but the number of people entering the room is notified from the room entry / exit management device 50 to the karaoke device 1. However, for example, each karaoke apparatus 1 may be able to be detected individually.

  In that case, a means for detecting the number of people present in the room where the karaoke apparatus 1 is installed may be connected to the karaoke apparatus 1. As this number detection means, it is conceivable to use a known number detection technique disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-175868. This will be specifically described with reference to FIG.

The person detection apparatus shown in FIG. 7 includes one or more cameras 91, an image acquisition apparatus 92, a person detection apparatus 93, and a person counting apparatus 94.
The camera 91 is installed above a target space where a large number of persons are present, and captures an image including a group of persons with a single camera or by switching a plurality of cameras.

  The image acquisition device 92 switches image frames taken by the camera 91 as necessary, captures them at predetermined time intervals, and performs a known process such as discretization to obtain a still image that can be processed.

  The person detection device 93 holds the contour shape model of the person, and extracts and extracts an image having a shape that matches the contour shape model within a predetermined allowable range from the image captured by the image acquisition device 92. As the person whose image is captured in the image, the coordinates on the image plane of the point representing the area where the person exists are output.

The person counting device 94 counts the number of persons existing in the field of view in the image from the person detection result obtained by the person detecting device 93.
The person counting result in the image counted by the person counting device 94 is output to the karaoke apparatus 1. Thereby, the karaoke apparatus 1 can grasp the number of persons existing in the room where the karaoke apparatus 1 is installed, and as a result, can acquire the number of persons entering the room.
[Others]
(1) As a method for specifying the number of people entering the room, for example, the number of people entering the room may be input by operating the operation panel 15 of the karaoke apparatus 1. In this method, the user of the karaoke apparatus 1 may enter the number of people entering the room. However, the clerk of the karaoke store goes to the room and inputs the number of people entering the room through the operation panel 15. The burden can be reduced. However, if such an operation occurs, it is more efficient to perform intensive management in the entrance / exit management device 50 as in the first embodiment described above.

  (2) In the above-described embodiment, an example realized as a so-called communication karaoke system has been described. However, even a stand-alone karaoke apparatus can be realized.

It is a block diagram which shows the structure of the communication karaoke system as an information communication system containing the karaoke apparatus of 1st Embodiment. It is explanatory drawing of a target gain value table. It is a flowchart which shows the process which concerns on the adjustment of the sound pressure frequency characteristic performed with the karaoke apparatus. 5 is a flowchart showing processing executed in an entrance / exit management device 50. It is structure explanatory drawing for the number detection in 2nd Embodiment. Time chart showing changes in signal state, counter value, etc. when four users A to D sequentially pass between light emitting unit 70 and light receiving unit 80 after the room input on / off signal changes from off to on It is. It is structure explanatory drawing for the number detection in 3rd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Karaoke apparatus, 10 ... Main control part, 11 ... CPU, 12 ... Modem, 13 ... RAM, 14 ... Hard disk storage device, 15 ... Operation panel, 16 ... Video processing part, 20 ... Audio | voice processing part, 21 ... CPU, 22 ... ROM, 23 ... RAM, 24 ... sound source unit, 25 ... equalizer, 26 ... voice effect unit, 30 ... monitor, 40 ... speaker, 45 ... microphone, 50 ... entrance / exit management device, 51 ... CPU, 52 ... ROM, 53 ... RAM, 54 ... hard disk storage device, 55 ... NIC, 60 ... monitor, 65 ... input device, 90 ... general public network or Internet, 100 ... host device for distribution, 101 ... CPU, 102 ... ROM, 103 ... RAM 104 hard disk storage device 105 communication control unit

Claims (8)

A sound pressure frequency characteristic adjusting device comprising: an equalizer capable of changing a gain value to change a sound pressure frequency characteristic in a reproduction sound field; and a gain value adjusting means for adjusting the gain value of the equalizer,
A target gain value storage means for storing a gain (hereinafter referred to as a target gain value) for specifying a plurality of target sound pressure frequency characteristics set according to the maximum capacity of the room and the number of people in the room;
Maximum capacity storage means for storing the maximum capacity of the room in which the device is present;
A room occupancy number specifying information acquisition means for acquiring information for specifying the number of people who actually entered the room where the device is present;
The gain value adjusting means sets the target gain value corresponding to the maximum number of persons stored in the maximum number of persons storage means and the number of persons entering the room specified by the specific information acquired by the number of persons entering room specifying information acquisition means. A sound pressure frequency characteristic adjusting device that reads from a gain value storage means and adjusts the gain value of the equalizer based on the read target gain value.   A karaoke apparatus comprising the sound pressure frequency characteristic adjusting apparatus according to claim 1. The karaoke apparatus according to claim 2,
It is configured to allow information communication with the entrance / exit management device for managing entrance / exit, including the management of the number of people in each room where the karaoke device exists,
The karaoke apparatus characterized in that the occupant number specifying information acquisition means acquires information specifying the actual occupant number of persons entering the room where the own karaoke apparatus exists from the entrance / exit management apparatus. The karaoke apparatus according to claim 2,
Provided with an approaching person detection means for detecting the number of persons entering the room where the karaoke device exists,
The karaoke apparatus characterized in that the occupant number specifying information acquiring unit acquires information for specifying the occupant number based on the number of entering people detected by the entering number detecting unit. The karaoke apparatus according to claim 2,
A presence number detecting means for detecting the number of people present in the room based on the captured video in the room in which the karaoke device is installed;
The karaoke apparatus characterized in that the room occupancy number specifying information acquisition unit acquires information for specifying the number of occupants based on the number of persons detected by the number of persons detection unit. The karaoke apparatus according to claim 2,
It has an acceptance means that can accept various inputs from users, including the number of users,
The karaoke apparatus characterized in that the occupant number specifying information acquiring unit acquires the number of users received by the receiving unit as information for specifying the occupant number. An information communication system comprising the karaoke device according to any one of claims 2 to 6 and a distribution host device, wherein the distribution host device and the karaoke device are configured to be able to communicate with each other via a communication line. Because
The distribution host device includes a distribution control unit that distributes the target gain value to the karaoke device. The gain value adjustment unit of the karaoke device includes the target gain value distributed from the distribution host device. An information communication system, wherein the gain value of the equalizer is adjusted based on A sound pressure frequency characteristic adjusting apparatus comprising: the equalizer according to claim 1; a gain value adjusting means; a target gain value storing means; a maximum accommodation number storing means; A program executed by a computer included in the frequency characteristic adjusting device,
The program for functioning the said computer as said gain value adjustment means with which the sound pressure frequency characteristic adjustment apparatus of Claim 1 is provided.

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