JP4961813B2 - Audio playback device - Google Patents

Description

  The present invention relates to an audio playback device.

  An audio playback device having a sound field correction function that adjusts the frequency characteristics, volume level, distance, etc. of a plurality of connected speakers for each speaker so that an optimal sound field is obtained at the user's listening position. There is (for example, Patent Document 1).

When automatic sound field correction is performed with such an audio playback device, the audio playback device generates a test signal from each of a plurality of speakers, and picks up the signals with a microphone arranged at the listening position. Is connected to the audio playback device, and various adjustments such as volume level, sound quality, and phase are performed on the connected speaker.
JP 2002-330500 A

  In addition, there is an audio playback apparatus that cannot set whether or not a speaker is connected for each channel. In such an audio playback device, the speaker setting is performed, for example, as a fixed 2-channel connection or 5.1-channel connection. Therefore, in such an audio playback device, when automatic sound field correction is performed and the result is displayed, since the connection is fixed, it is displayed that all speakers are connected. .

  Therefore, the minimum value (for example, 0 dB at the sound volume level and 0.0 m at the speaker distance) is displayed as the speaker setting information of the speaker that is determined not to be connected to the audio playback device by the automatic sound field correction. Therefore, from this display, there is a problem that it is difficult to determine whether the speaker is not connected, is connected, or is a measurement error.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an audio playback apparatus that performs an appropriate display that does not confuse the user when displaying the result of speaker setting information.

In order to achieve the above object, an audio playback device according to a first aspect is provided.
In an audio playback apparatus having a plurality of speaker channels that can be connected to a plurality of speakers,
The audio playback device includes:
Playback means for playing back sound from a speaker connected to the speaker channel;
The presence / absence of a speaker connected to the speaker channel is specified and connected to the speaker channel so that the sound field formed by the sound reproduced by the reproducing means at a predetermined listening position becomes a predetermined sound field. Automatic sound field setting means for setting a playback environment for each speaker,
In a plurality of loudspeakers that will be connected to the loudspeaker channel, and the speaker information storing means for storing the speaker setting information including connection information that indicates the presence or absence of the connection of the speaker as a parameter,
For the speaker channel identified as being connected by a speaker by the automatic sound field setting means, parameters other than the connection presence / absence information in the speaker setting information of the speaker channel stored in the speaker information storage means Speaker information display means for displaying a set value;
With respect to the speaker channel specified by the automatic sound field setting means that the speaker is not connected, parameter setting values other than the connection presence / absence information of the speaker channel when the speaker is connected to the speaker channel a position to be displayed, other than the value can be taken as a set value, and the information representative of the unconnected, and a non-connected display means for displaying in place of the set value,
It is characterized by that.

For example, the audio playback device
Speaker information changing means for changing setting information of a speaker connected to the speaker channel;
When the speaker is connected to the speaker channel displaying that the speaker is not connected by the unconnected display means, and the setting information of the connected speaker is changed by the speaker information changing means, the value of the setting information May be further provided with speaker setting information changing means for changing the value to the minimum value that can be set by the audio playback apparatus.

For example, the audio playback device
When the speaker is connected to the speaker channel in which it is displayed that the speaker is not connected by the unconnected display unit, the speaker setting information initialization unit is further configured to initialize the setting information value of the speaker. May be.

For example, the audio playback device
When the speaker is connected to the speaker channel where it is displayed that the speaker is not connected by the unconnected display means, the setting information values of the speakers connected to all the speaker channels are initialized. Speaker setting information initialization means may be further provided.

For example, the audio playback device
Speaker setting information initialization means for initializing values of setting information of the speakers connected to all the speaker channels when at least one speaker connected to the speaker channels is removed from the speaker channel. May be further provided.

  ADVANTAGE OF THE INVENTION According to this invention, when displaying the result of the setting information of the speaker connected to an audio reproduction apparatus, it becomes possible to provide the audio reproduction apparatus which performs an appropriate display which does not confuse a user.

Hereinafter, an audio playback apparatus according to an embodiment of the present invention will be described with reference to the drawings.
The audio playback device 10 according to the embodiment of the present invention is compatible with 5.1 channel audio output, and is connected to six speakers SP1 to SP6 as shown in FIG. When reproducing 5.1-channel multi-contents, the audio reproduction device 10 outputs audio signals controlled separately from the speakers SP1 to SP6, respectively, thereby enabling a sound reproduction environment in which a realistic sound can be heard. Is provided to the user. The speakers SP1 to SP6 are a front left speaker (FL), a subwoofer (SW), a center speaker (C), a front right speaker (FR), a left surround speaker (LS), and a right surround speaker (RS), respectively.
Further, it is assumed that the audio reproducing apparatus 10 cannot set the presence / absence of connection for each speaker, and the speaker can be connected only to 5.1 channel.

  In addition, the audio reproduction device 10 has a sound field correction processing function to be described later. When performing sound field correction, as shown in FIG. 2, a microphone MIC for receiving a test signal is connected to the audio playback device 10 as necessary. The microphone MIC is disposed at the listening position of the user.

  As shown in FIG. 1, the audio playback device 10 includes an operation unit 101, a display unit 102, a RAM (Random Access Memory) 103, a ROM (Read Only Memory) 104, a communication unit 105, a control unit 106, , A microphone amplifier unit 107, a DSP (Digital Signal Processor) 108, a speaker amplifier unit 109, and a test signal generation unit 110.

  The operation unit 101 receives an input of a user operation signal using an operation input key such as a remote controller, and supplies data corresponding to the input operation signal to the control unit 106.

  The display unit 102 is composed of a liquid crystal display panel or the like, and displays messages, charts, and the like indicating the operation status of the audio playback device 10 in accordance with display data supplied from the control unit 106.

The RAM 103 serves as a work space for the control unit 106 to perform processing.
Further, the RAM 103 stores operation parameters of the speakers SP1 to SP6. Audio signals are supplied to the speakers SP1 to SP6 with operating characteristics according to the operating parameters.

  FIG. 3 shows an example of operation parameters. In this example, the presence / absence of connection, volume level (volume), speaker distance, speaker size, and frequency identification are set as operation parameters for each speaker. The presence or absence of connection indicates whether or not the corresponding speaker is connected. The volume level (volume) indicates the volume level of the audio signal supplied to each speaker. In other words, it is also a signal indicating the amplification factor of each audio signal. The speaker distance is a parameter for controlling the internal delay time for adjusting the output timing of each speaker. The speaker size is a parameter that specifies the size of the speaker, such as large, medium, and small. The frequency specification corresponds to a so-called equalizer, and is data for setting which frequency band is emphasized and which frequency band is weakened.

  The ROM 104 stores a program for the control unit 106 to perform processing. Details of the processing will be described later.

  The communication unit 105 is connected to a network such as the Internet, and acquires content information (audio information) from a content server (not shown).

  The control unit 106 controls the overall operation of the audio playback device 10. The control unit 106 operates according to a program stored in the ROM 104. Details of the operation executed by the control unit 106 will be described later.

  The microphone amplifier unit 107 A / D converts and amplifies the collected sound signal from the microphone MIC connected to the microphone amplifier unit 107. Then, the microphone amplifier unit 107 transmits the digitally amplified sound collection signal to the DSP 108 described later.

  The DSP 108 performs various processes on the audio signal supplied to the DSP 108. For example, the DSP 108 performs a process of decoding an audio signal encoded in a multi-channel method and dividing the audio signal into audio signals of respective audio channels. Further, the DSP 108 performs various adjustment processes such as adjustment of the volume level, adjustment of the distance between the speaker and the listening position, and adjustment of the frequency characteristics in the sound field correction process described later.

The speaker amplifier unit 109 converts the audio data input from the DSP 108 into an analog signal by D / A conversion and amplifies it. Then, the speaker amplifier unit 109 extracts an audio signal from the analog amplified signal and supplies it to the speaker.
Six speakers SP <b> 1 to SP <b> 6 are connected to the speaker amplifier unit 109.

  The test signal generation unit 110 supplies a test signal to the DSP 108 in the sound field correction process described later in accordance with control from the control unit 106.

Next, a process (sound field correction process) for adjusting the set values (operation parameter values) of the connected speakers SP1 to SP6 by the audio reproducing apparatus 10 having the above configuration will be briefly described.
First, the user instructs the audio playback device 10 to start the sound field correction process by operating the remote controller or the like. The operation unit 101 detects this instruction and notifies the control unit 106 of it. In response to this instruction, the control unit 106 first emits test signals sequentially from the connected speakers, and acquires the signals from the microphone MIC arranged at the listening position. Then, it is determined whether or not each speaker is connected to the audio playback device 10 based on the acquired sound emission signal, and it is recorded in the operation parameter stored in the RAM 103. The control unit 106 also listens. Analyzing the sound emission signal acquired from the microphone MIC placed at the position, set the volume level, speaker distance, speaker size, etc. so that the optimum sound field is formed at the listening position, and use it as the operating parameters Record as.

  As described above, an optimal sound field is formed at the listening position, and the user can obtain a realistic sound effect.

Next, an operation in which the user displays the speaker setting information in the audio playback device 10 having the above configuration will be described.
As a premise, it is assumed that this audio reproduction apparatus can only connect 5.1 channel speakers and cannot individually set the presence or absence of speaker connection. In addition, it is assumed that the sound field correction process has already been performed, and the adjustment parameters (speaker presence / absence, speaker distance, volume level, frequency characteristic) are set as shown in FIG.

  First, the user instructs speaker information display by operating, for example, a speaker information display button on the remote controller.

  In response to this instruction, the control unit 106 of the audio playback device 10 displays a GUI (Graphical User Interface) screen shown in FIG. The user selects a necessary process according to the display.

  Here, it is assumed that the volume level display is selected by the user. Then, a GUI screen showing the type and volume level of the speaker as shown in FIG.

  On this screen, the user operates the left and right keys of the remote controller to select a speaker for displaying speaker information. The control unit 106 causes the display unit 102 to display the type of speaker and the volume level acquired from the operation parameters according to the input content. Further, the control unit 106 displays a message “No Speaker”, which is a display that cannot be obtained when a speaker is connected, in a volume level display field for a speaker whose operation parameter is set to “no speaker”. 102 is displayed.

  For example, when SP1 (front left FL) is selected, the control unit 106 acquires the volume level value +3 dB set in the operation parameter (FIG. 7A), and displays this on the screen. (FIG. 5 (a)). Further, when SP2 (subwoofer SW) is selected, the control unit 106 determines that SP2 is not connected to the audio playback device 10 based on the operation parameters (FIG. 7A), and thus the message is displayed. “No Speaker” is output to the display unit 102 (FIG. 5B).

  As described above, when speaker information (volume level in this example) of a speaker that is determined not to be connected to the audio playback device 10 by the sound field correction process is displayed, this indicates that the connection is not established. Information is displayed as speaker information. Therefore, an easy-to-understand display can be realized without causing confusion for the user.

  Next, an operation of the audio playback device 10 having the above configuration in which the user changes the setting information of the speaker will be described.

  The precondition is the same as the speaker information display operation described above, and the audio playback apparatus 10 cannot individually set the presence or absence of speaker connection. Further, it is assumed that the sound field correction process described later has already been executed, and the adjustment parameters (speaker presence / absence, speaker distance, volume level, frequency characteristic) are set as shown in FIG. .

  First, the user gives an instruction to set speaker information by operating, for example, a speaker information setting button on the remote controller.

  In response to this instruction, the control unit 106 of the audio playback device 10 displays a GUI (Graphical User Interface) screen shown in FIG. The user selects a necessary process according to the display.

  Here, it is assumed that the volume level change is selected by the user. Then, a GUI screen showing the type and volume level of the speaker as shown in FIG.

  On this screen, the user operates the left and right keys of the remote controller to select the speaker whose volume level is to be changed. By this operation, the method for acquiring the display content of the type and volume level of the speaker displayed on the screen is the same as the display of the speaker information described above.

Further, the user can change the volume level on this screen by operating the up and down keys of the remote controller.
Specifically, when the volume level of the center speaker C is displayed as +5 dB as shown in FIG. 6A, each time the upper key of the remote controller is pressed once, +6 dB, +7 dB, and 1 dB are increased. Each time the down key is pressed, the display is changed so as to decrease by +4 dB, +3 dB, and 1 dB. Then, by operating the determination key of the remote controller, the operation parameter of the speaker is changed as displayed on the screen.

  When +10 dB, which is the maximum value of the volume level, is displayed, the volume level display remains at +10 dB even if the up key is operated. Similarly, when -10 dB, which is the minimum value of the volume level, is displayed, the volume level display remains at -10 dB even if the down key is operated.

Further, when the SP2 (subwoofer SW) speaker volume level change screen is displayed as shown in FIG. 6B, SP2 is connected to the audio playback device 10 according to the operation parameters of SP2 (FIG. 7A). “No Speaker” is displayed as the volume level because it is set to not.
Here, the operation when the user connects the speaker SP2 to the speaker channel corresponding to the speaker SP2 (subwoofer SW) set to no connection and operates the up and down keys of the remote controller to change the volume level. explain.
In this case, the control unit 106 detects that the speaker SP2 is newly connected to the speaker channel corresponding to the speaker SP2, and accordingly displays 0 dB as the volume level (FIG. 6C). Then, the control unit 106 changes the display of the volume level by ± 1 dB as described above every time the up / down key of the remote controller is operated thereafter. Then, by operating the determination key of the remote controller, the control unit 106 changes the operation parameter of the speaker as displayed on the screen.

  As described above, when a speaker is connected to a speaker that is not connected to the audio playback device 10 and an operation of changing information (volume level in this case) on the speaker is performed, it is confirmed that the speaker is not connected. From the display, a display indicating the minimum value (0 dB here) indicating the speaker information (volume level here) is displayed first, and subsequent change processing can be performed.

  Next, another operation of the audio reproduction device 10 having the above configuration when the user changes the speaker connection will be described.

Specifically, in the audio playback device in which the operating parameters of the speakers SP1 to SP6 connected to the audio playback device 10 are in the state as shown in FIG. 7A, the speaker SP2 (subwoofer SW) for which no connection is set. A case where the user connects the speaker SP2 to the speaker channel corresponding to) is taken as an example.
In this case, a signal indicating that a speaker is newly connected (speaker information change information) is transmitted from the speaker channel to the control unit 106. When the control unit 106 receives the signal, it resets the operating parameters of all the speakers and initializes them to the factory-operating operating parameters (FIG. 7B). Even when the speaker is disconnected from the audio playback device 10, the speaker information change information is similarly transmitted from the speaker channel to the control unit 106, and the operation parameters of all the speakers are initialized.

  In the case of the above operation, the user can initialize the speaker information of all the speakers when the speakers are connected or disconnected from the audio playback device 10, which is convenient for the user.

  In addition, this invention is not limited to what was shown by the said embodiment, A various deformation | transformation and application are possible.

  For example, in the present embodiment, the display / change of the volume level of the speaker has been described as an example of displaying / changing the speaker setting. However, the present invention is not limited to this, and the speaker distance, frequency characteristics, and the like may be displayed and changed in the same manner.

  In the present embodiment, it has been described that the speaker information is displayed by the user operating the speaker information display button. However, the present invention is not limited to this, and the speaker information is automatically detected when the unconnected speaker is detected. May be displayed.

  Further, in the present embodiment, when displaying the speaker setting information of the speaker channel to which no speaker is connected, the message “No Speaker” indicating that is displayed. However, the present invention is not limited to this. For example, a message such as “No Connect” may be displayed, or it may be symbolically illustrated that the speaker is not connected. What is necessary is just to be able to notify reliably. .

  Also, in this embodiment, it has been described that when a speaker is connected to a speaker channel to which no speaker is connected, the operating parameters of all speakers are initialized. However, only the operating parameters of the connected speakers are initialized. Also good.

  In this embodiment, the audio playback apparatus is described as being compatible with 5.1 channels. However, the present invention is not limited to this, and the audio is compatible with 7.1 channels or 2 channels (stereo). The same applies to the playback apparatus.

It is a figure which shows the structure of the audio reproduction apparatus which concerns on embodiment of this invention. It is a figure which shows a structure when the audio reproduction apparatus shown in FIG. 1 is arrange | positioned in a room with a speaker and a microphone. It is an example of the operating parameter of the speaker stored in RAM of the audio reproduction apparatus shown in FIG. It is a figure which shows the example of a display of speaker information display operation (a) and speaker information change operation (b). It is a figure which shows the example of a display of speaker volume level display operation. It is a figure which shows the example of a display of speaker volume level change operation. It is a figure which shows the example of the operation parameter (a) of the speaker before changing speaker connection, and the operation parameter (b) after changing.

Explanation of symbols

10 Audio playback device
101 Operation unit 102 Display unit 103 RAM
104 ROM
105 Communication Unit 106 Control Unit 107 Microphone Amplifier Unit 108 DSP
109 Speaker Amplifier Unit 110 Test Signal Generation Unit MIC Microphone SP1 to SP6 Speaker

Claims (5)

In an audio playback apparatus having a plurality of speaker channels that can be connected to a plurality of speakers,
The audio playback device includes:
Playback means for playing back sound from a speaker connected to the speaker channel;
The presence / absence of a speaker connected to the speaker channel is specified and connected to the speaker channel so that the sound field formed by the sound reproduced by the reproducing means at a predetermined listening position becomes a predetermined sound field. Automatic sound field setting means for setting a playback environment for each speaker,
In a plurality of loudspeakers that will be connected to the loudspeaker channel, and the speaker information storing means for storing the speaker setting information including connection information that indicates the presence or absence of the connection of the speaker as a parameter,
For the speaker channel identified as being connected by a speaker by the automatic sound field setting means, parameters other than the connection presence / absence information in the speaker setting information of the speaker channel stored in the speaker information storage means Speaker information display means for displaying a set value;
With respect to the speaker channel specified by the automatic sound field setting means that the speaker is not connected, parameter setting values other than the connection presence / absence information of the speaker channel when the speaker is connected to the speaker channel a position to be displayed, other than the value can be taken as a set value, and the information representative of the unconnected, and a non-connected display means for displaying in place of the set value,
An audio playback apparatus characterized by that. Speaker information changing means for changing setting information of a speaker connected to the speaker channel;
When the speaker is connected to the speaker channel displaying that the speaker is not connected by the unconnected display means, and the setting information of the connected speaker is changed by the speaker information changing means, the value of the setting information Further includes speaker setting information changing means for changing the value to a minimum value that can be set by the audio playback device.
The audio reproducing apparatus according to claim 1, wherein The apparatus further comprises speaker setting information initialization means for initializing the value of the setting information of the speaker when the speaker is connected to the speaker channel displaying that the speaker is not connected by the unconnected display means. ,
The audio reproducing apparatus according to claim 1 or 2 , characterized in that When the speaker is connected to the speaker channel where it is displayed that the speaker is not connected by the unconnected display means, the setting information values of the speakers connected to all the speaker channels are initialized. A speaker setting information initialization unit;
The audio reproducing apparatus according to claim 1 or 2 , characterized in that Speaker setting information initialization means for initializing values of setting information of the speakers connected to all the speaker channels when at least one speaker connected to the speaker channels is removed from the speaker channel. Further comprising
Audio reproducing apparatus according to any one of claims 1 to 4, characterized in that.

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