JPH1021048A - Method and device for speech output - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and device for speech output which can easily adjust output characteristics of intended speech data without requiring complicated operation. SOLUTION: Adjustment contents of output characteristics of speech data are specified by operator's drawing. Recognized drawing data (including the size of the line drawing) are acquired (step S401) and when it is decided (step S402) from the direction of the drawing of the drawing data that an object that the operator is trying to adjust this time is speech data to a left-side speaker, a sound volume data coefficient K is acquired (step S403) from the curve shape of the line drawing and a sound volume setting table, so that sound volume data V is set (step S404) according to the size of the line drawing. Then the found sound volume data V are set by frequency bands in a synthesizer to set the sound volume of the speaker, i.e., speech output level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio output device for adjusting output characteristics of audio data and outputting the adjusted audio data.

[0002]

2. Description of the Related Art Conventionally, it is mounted on a computer or the like,
2. Description of the Related Art There is known an audio output device that outputs filed audio data or audio data stored in a memory in addition to audio data received from an external sound source. A graphical interface (GUI) is widely used for adjusting output characteristics of audio data such as volume, sound quality, and reproduction speed of the audio data in the audio output device. With generally-related music-related hardware and software, adjustment of output characteristics of audio data is performed, for example, by operating buttons, sliders, scroll bars, and the like displayed on the screen using a mouse or the like. It is configured as follows.

[0003]

However, the operation using an input device such as a mouse as in the prior art is not always suitable for adjusting the output characteristics of audio data.

That is, in the above-mentioned conventional audio output device,
In addition to forcing the operator to perform operations unrelated to the image of the output characteristics of the audio data, such as moving the mouse cursor, clicking the mouse button, or dragging the mouse button, the user performs various settings related to the audio characteristics. Many objects to be operated by the mouse, such as buttons and slide bars, flood the screen, and the screen display becomes complicated. In such a situation, accurate operation becomes difficult, and the mental and physical fatigue of the operator increases, and the operation time is prolonged. As described above, there is a problem that the operability for realizing an image of the intended output characteristics of the audio data is extremely poor.

[0005] In addition, the operation with the mouse or the like is a serious problem for visually impaired persons and the like, because the operation mainly depends on the sight, such as the operation on the operation target on the screen.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to easily adjust the output characteristics of intended audio data without requiring complicated operations. It is an object of the present invention to provide a voice output method and a voice output device capable of performing the above.

[0007]

According to a first aspect of the present invention, there is provided an audio output method for outputting audio data, comprising: a receiving step of receiving drawing data; And adjusting an output characteristic of the audio data based on the drawing data received in (1).

In order to achieve the same object, according to a second aspect of the present invention, in the audio output method according to the first aspect, the output characteristic of the audio data includes at least one of a volume and a frequency. And

According to a third aspect of the present invention, there is provided a voice output method according to the second aspect, further comprising a recognition step of recognizing a diagram relating to the drawing data received in the receiving step. The adjusting step includes a volume increasing / decreasing step of increasing / decreasing the volume for each predetermined frequency band according to the shape of the diagram recognized in the recognition step.

In order to achieve the same object, according to a fourth aspect of the present invention, there is provided the voice output method according to the second aspect, further comprising a recognition step of recognizing a diagram relating to the drawing data received in the receiving step. The adjusting step includes a frequency raising / lowering step of raising / lowering the entire frequency of the audio data in accordance with the size of the diagram recognized in the recognition step.

In order to achieve the same object, according to a fifth aspect of the present invention, in the audio output method according to the first aspect, the audio data is output to a plurality of speakers. An output step, and a drawing direction recognition step of recognizing a drawing direction of a diagram according to the drawing data received in the receiving step, wherein the adjusting step is performed in a drawing direction of the diagram recognized in the drawing direction recognition step. And an individual adjustment step of individually adjusting the output characteristics of the audio data output to the plurality of speakers in response thereto.

According to another aspect of the present invention, there is provided an audio output apparatus for outputting audio data, comprising: receiving means for receiving drawing data; and drawing data received by the receiving means. Adjusting means for adjusting the output characteristics of the audio data based on the

According to a seventh aspect of the present invention, there is provided an audio output apparatus according to the sixth aspect, wherein the output characteristic of the audio data includes at least one of a volume and a frequency. And

According to another aspect of the present invention, there is provided an audio output device according to the present invention, further comprising a recognition unit for recognizing a diagram relating to the drawing data received by the reception unit. Wherein the adjusting means includes a volume increasing / decreasing means for increasing / decreasing the volume for each predetermined frequency band in accordance with the shape of the diagram recognized by the recognizing means.

According to a ninth aspect of the present invention, there is provided an audio output apparatus according to the seventh aspect, further comprising a recognition unit for recognizing a diagram relating to the drawing data received by the reception unit. The adjustment means includes frequency raising / lowering means for raising / lowering the entire frequency of the audio data in accordance with the size of the diagram recognized by the recognition means.

According to a tenth aspect of the present invention, there is provided an audio output apparatus according to any one of the sixth to ninth aspects.
In the configuration described in the paragraph, output means for respectively outputting the audio data to a plurality of speakers, and drawing direction recognition means for recognizing a drawing direction of a diagram related to the drawing data received by the receiving means, wherein the adjustment The means includes individual adjustment means for individually adjusting output characteristics of audio data output to the plurality of speakers according to the drawing direction of the diagram recognized by the drawing direction recognition means. .

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) An audio output device according to a first embodiment of the present invention will be described below.

FIG. 1 is a block diagram showing the overall configuration of the audio output device according to the first embodiment of the present invention.

The CPU 1 has an input interface 4,
The display controller 5, the synthesizer 8, the audio generator 10 and the storage 12 are connected via the CPU bus 11. The input interface 4 includes an input pen 2
And the transparent digitizer 3 are connected. A VRAM (video RAM) 6 and a liquid crystal display 7 are connected in series to the display controller 5. A speaker 9L and a speaker 9R are connected to the synthesizer 8.

The storage unit 12 has a drawing data buffer 13
And a RAM 14. The RAM 14 stores a control program for executing an audio data output characteristic adjustment process, an audio output process, and the like by the CPU 1, which will be described later, as well as various data such as a map and an audio data file used in these processes. Have been.

The CPU 1 is provided with an audio data buffer 15 for storing audio data. Hereinafter, the function and operation of each component will be described.

The operator draws on the transparent digitizer 3 using the input pen 2. The transparent digitizer 3 outputs to the input interface 4 coordinate values of the trajectory of the input pen 2 touching the transparent digitizer 3, and the input interface 4 uses the coordinate values as drawing data as a display controller 5.
And outputs it to the CPU 1.

The display controller 5 forms an image based on the drawing data input from the input interface 4 and outputs the image to the VRAM 6. VRAM6
Transfers the image input from the display controller 5 to the liquid crystal display 7, and the liquid crystal display 7 displays the transferred image. The operator can check the diagram drawn by the operator on this screen display.

The CPU 1 recognizes the drawing data input from the input interface 4 as described later, and stores the recognition result (hereinafter referred to as “recognized drawing data”) in the storage unit 1.
Output to 2. The storage unit 12 registers the input recognized drawing data in the drawing data buffer 13 in the order of input.

The CPU 1 reads audio data received from an external device such as a CD-ROM by the audio generation unit 10 or executes audio data from an audio data file stored in the RAM 14 during audio output processing described later. The data is read and stored in the audio data buffer 15. And
Based on the recognized drawing data registered in the drawing data buffer 13,
The PU 1 and the synthesizer 8 adjust. Details of the processing will be described later.

The synthesizer 8 generates audio signals output from the speakers 9L and 9R from the audio data input from the CPU 1. At that time, the synthesizer 8 individually adjusts the output characteristics of each audio data output to each speaker according to the control of the CPU 1 to generate an audio signal. Then, the generated audio signals are output to the speakers 9L and 9R, respectively. The speakers 9L and 9R output (sound) the input audio signal to the outside.

FIG. 2 is a flowchart showing the procedure of the drawing data recognition process by the audio output device according to the first embodiment. This process is executed by the CPU 1.

First, by examining the coordinate value at which the input pen 2 touches the transparent digitizer 3, it is first determined whether or not drawing has been performed, that is, whether or not drawing data is present on the input interface 4 (step S201). If there is drawing data, it is determined whether or not the current state is “start writing” (step S202). At this time, if there is no drawing data drawn immediately before, it is determined that the current state is “writing start”, while if there is drawing data drawn immediately before, the drawing is being performed, that is, the current state is “writing start”. It is determined that the state is not "." If the result of this determination is that the current state is "start writing", the drawing data buffer 13 is initialized as pen-down processing (step S203).
The drawing process is executed, that is, the drawing data currently drawn is sequentially input (step S204), and the process returns to step S201. On the other hand, if the result of determination in step S202 is that the current state is not "writing started", the process immediately proceeds to step S204.

If the result of determination in step S201 is that there is no drawing data in the input interface 4, it is determined whether or not the current state is "writing completed" (step S205). At this time, if there is drawing data drawn immediately before, it is determined that the current state is “end of writing”. On the other hand, if there is no drawing data drawn just before, the input interface 4 inputs the drawing data. It is determined that it is not in the waiting state, that is, the current state is the state of “writing end”. As a result of this determination, if the current state is not the “end of writing”, the process returns to the step S201. On the other hand, if the current state is the “end of the writing”, the drawn interface (Step S206), the drawing data recognition process is executed, and the recognition result (recognition drawing data)
Is registered in the drawing data buffer 13 (step S2).
07), this process ends.

The recognition of the drawing data is also called so-called gesture recognition, and is performed by a known method (for example, Japanese Patent Publication No.
67988, Japanese Patent Publication No. 5-84540, etc.). According to this method, for example, the locus of the drawn curve, the drawing direction of the diagram, the shape of the diagram, the size of the diagram (the size of the gesture), and the like are recognized. Here, the size of the diagram is the area of the smallest rectangle that includes a one-stroke gesture. It is assumed that the recognition drawing data includes the size of the diagram.

Note that, even when this processing is executed as a process of one application in a window system or the like, another application is executed after the execution of the step S207, and thereafter, the processing from the step S201 is repeated again. By repeating the processing, the execution of this processing is continued.

FIG. 3 is a flowchart showing the procedure of the audio output processing by the audio output device according to the first embodiment. This process is executed by the CPU 1. This process may be executed asynchronously with the above-described drawing data recognition process.

First, the audio data is stored in the audio data buffer 1.
5 (step S301), and if it exists, the process immediately proceeds to step S303. On the other hand, if the audio data does not exist in the audio data buffer 15,
After reading the audio data from the audio data file in the RAM 14 (step S302), step S303 is performed.
Proceed to. Here, audio data transmitted in real time through a video conference system or the like may be read. Further, as described above, the audio data may be read from the audio generation unit 10.

In the following step S303, it is checked whether or not the present audio output device is in the reproduction mode. The reproduction mode refers to a state in which, for example, a reproduction button or the like displayed on the liquid crystal display 7 is set to ON, and means that a sound is being output or a state in which sound can be output.

Next, based on the result of the check in the step S303, it is determined whether or not the present audio output device is in the reproduction mode (step S304). The output characteristic of the audio data to be output is adjusted (step S30).
5) Execute the audio output processing (step S306).
This audio output process is a process in which audio output is started if audio output is not currently being performed, while output is continued if audio output is currently being performed.

Next, it is determined whether or not there is no more audio data to be output (step S307). If there is no more audio data to be output, the process is terminated. On the other hand, if there is audio data to be output, the process returns to step S301.

If the result of the determination in step S304 is that the audio output device is not in the reproduction mode, the processing is immediately terminated.

FIG. 4 is a flowchart showing the procedure of the audio data output characteristic adjustment processing executed in step S305 of FIG.

First, the recognition drawing data (including the size of the diagram) registered in the drawing data buffer 13 in step S207 of FIG. 2 is obtained (step S401), and the object for which the operator is to perform the adjustment this time But the speaker 9
It is determined whether the data is audio data for L (step S402). This determination is made based on the drawing direction as described below.

FIG. 5 is a diagram showing an example of the recognition drawing data recognized in step S207 of FIG.

In order to simplify the recognition of the drawing data, the pattern of the drawing to be drawn is a one-stroke gesture. That is, the drawing operation is performed by a so-called single-stroke drawing operation by the operator. Further, a pattern of a line diagram, that is, a gesture that can be easily imagined from a graph of the power spectrum of the audio output with the horizontal axis representing the frequency and the vertical axis representing the output level is determined in advance, and this is drawn by the operator. These gestures include at least information on the locus of the drawn curve, the drawing direction of the diagram, the shape of the diagram, and the size of the diagram.

The drawing data drawn under such conditions is recognized as a diagram of a continuous curve from the start point to the end point as shown in FIG. The meaning of each diagram is interpreted as follows.

First, whether the operator adjusts the voice data for the left or right speaker this time is designated by drawing in the left or right direction from the start point of the recognition drawing data. Therefore, whether the object that the operator is trying to adjust this time is the sound data for the left or right speaker depends on the input direction of the coordinate values based on whether the drawing is performed in the left or right direction from the start point of the recognition drawing data. It is determined by recognizing based on this. For example, when the recognition drawing data is the left-row diagram of the two-row diagram shown in the figure, it is determined that the audio data for the speaker 9L is to be adjusted.

The adjustment of the overall volume is designated by the magnitude of the diagram. The shape of the diagram when specifying the overall volume adjustment is
For example, the shapes shown in FIGS. Therefore,
For example, as shown in FIG. 7A, it is recognized that when the diagram is large, the whole sound volume is increased, and as shown in FIG. 7C, when the diagram is small, the whole sound volume is adjusted to be small. You.

Volume adjustment for each frequency component (partial emphasis)
Is specified by the shape of a diagram, for example, the waveform of a curve.
For example, the horizontal axis represents the frequency, and the vertical axis represents the output level. Taking FIG. 3E as an example, of the audio data, the left side of FIG. 4E corresponds to the output level of the low-pitched portion and the right side corresponds to the output level of the high-pitched portion. Therefore, it is recognized that the downward-sloping curve as shown in FIG. 11E designates emphasis of a treble part (volume increase adjustment). Similarly, (g) in FIG. 7 emphasizes bass, and (i) emphasizes treble.
It is recognized that FIG. 9 (k) designates the emphasis of the middle part. As described above, FIG.
It is recognized that both (i) and (k) specify audio data for the speaker 9L.

The diagram shown in the right column of the figure is a diagram showing the drawing data when the same designation as the diagram shown in the left column is made for the speaker 9R.

Returning to FIG. 4, as a result of the determination in the step S402, the object that the operator is going to adjust this time is as follows.
If the audio data is for the speaker 9L, the following step S is performed for the audio data for the speaker 9L.
The processing of 403 to S405 is executed.

First, in step S403, a volume data coefficient K indicating the ratio of volume increase / decrease adjustment is obtained from the volume setting table.

FIG. 6 is a diagram showing an example of the volume setting table. Data relating to the volume setting table is stored in the RAM 14 in advance. The volume setting table shows that the audio data is divided into five frequency bands (28 (Hz), 148 (Hz), and 784 (H).
z), 4148 (Hz), 2195 (Hz))
The volume data coefficient K is determined for each frequency band. Further, the volume data coefficient K is used to adjust the output characteristics of the audio data specified by the recognition drawing data obtained as the recognition result (volume increase, volume decrease, treble enhancement, etc.
The content corresponding to the recognition drawing data in FIG. 5).

For example, in the case of treble emphasis corresponding to FIG. 5 (e), as shown in FIG. 6, the volume data coefficient K at 784 (Hz) is set to “0”, and the lower the frequency becomes, the lower the value becomes. The value is set to a numerical value having a large tendency, and is set to a numerical value having a positive tendency as the frequency becomes higher.

The numerical values defined in the volume setting table are merely examples, and may be set freely by the operator, or may be determined based on a sampling frequency preset in the synthesizer 8.

Returning to FIG. 4, in the following step S404,
From the size of the diagram (the size of the gesture) to the volume data V
Set. Specifically, assuming that the size of the recognized diagram is L, the standard size set in advance for each gesture is M, and an appropriate constant obtained by experiment is T, the volume data V is V = (LM) + T × K for each frequency band.

In the following step S405, the sound volume data V thus obtained is set in the synthesizer 8 for each frequency band, thereby setting the sound volume of the speaker 9L, that is, the sound output level, and this processing ends.

On the other hand, if the result of the determination in step S402 is that the operator intends to make adjustments this time is audio data for the speaker 9R, the speaker 9
Steps S406 to S
408 is executed. This processing is performed in step S
This is the same as the processing of 403 to S405.

According to the processing shown in FIGS. 2, 3, and 4, the output characteristic of the intended audio data is not required without complicated operation irrespective of the image of the output characteristic of the audio data such as mouse operation. The adjustment can be accurately and easily realized by a simple operation.

Further, since adjustment of a plurality of output characteristics such as selection of left and right of a speaker, setting of each sound frequency band, and setting of the whole sound volume can be simultaneously designated with minimum drawing, operability is remarkably improved. Can be improved.

Further, since work that depends on vision, such as operation on the screen, can be minimized, fatigue due to operation can be reduced, which is particularly useful for visually impaired persons and the like.

(Second Embodiment) Hereinafter, an audio output device according to a second embodiment of the present invention will be described.

The audio output device according to the second embodiment is
The configuration of the audio output device according to the first embodiment is basically the same as that of the audio output device according to the first embodiment, and is as shown in FIG. The first of the implementation
The same components as those of the audio output device according to the embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The second embodiment differs from the first embodiment only in that the adjustment target based on the recognition drawing data is limited to the entire frequency of the audio data (the reproduction speed of the audio data). Therefore, the adjustment processing of the audio data output characteristics
FIG. 7 replaces FIG. 4 and an example of the recognition drawing data is illustrated in FIG. 8 instead of FIG.

FIG. 7 is a flowchart showing the procedure of the audio data output characteristic adjustment processing executed in step S305 of FIG.

First, in step S207 in FIG. 2, the recognition drawing data registered in the drawing data buffer 13 is obtained (step S701), and it is determined that the size of the obtained diagram should increase the frequency of the audio data. It is determined whether or not it means (step S702).

FIG. 8 is a diagram showing an example of the recognized drawing data recognized in step S207 of FIG. In the second embodiment, since the adjustment target is only the entire frequency of the audio data, the drawing data only needs to be the size of the diagram.

When the adjustment of the whole frequency is designated, the shape of the diagram should be intuitively understandable, for example, as shown in FIGS. The size is designated by the size of the figure, and the degree of ascending or descending is designated by the vertical direction of the diagram. Therefore, it is recognized that the adjustment is performed so that the entire frequency is increased in FIG. 11A, the frequency is slightly increased in FIG. 11B, the frequency is decreased in FIG. 11C, and the frequency is slightly decreased in FIG. .

Returning to FIG. 7, if the size of the acquired diagram indicates that the frequency of the audio data should be increased as a result of the determination in step S702, the size of the recognized diagram is determined. The reproduction speed data V2 is obtained in order to increase the reproduction speed of the audio data accordingly (step S703). Specifically, the size of the recognized diagram is represented by L
2. Assuming that an appropriate constant obtained by experiment is T2 and the current reproduction speed data is V0, the reproduction speed data V2 is
V2 = V0 + L2 × T2.

In the following step S705, by setting the obtained reproduction speed data V2 in the synthesizer 8, the entire frequency of the audio data is adjusted (in this case, increased), and this processing is ended.

On the other hand, as a result of the determination in step S702,
If the size of the obtained diagram does not mean that the frequency of the audio data should be increased, the playback speed should be reduced to reduce the playback speed of the audio data according to the size of the recognized diagram. Find data V3 (step S7)
04). Specifically, the reproduction speed data V3 is V3 = V
It is determined by 0−L2 × T2. Subsequent step S70
In step 5, the obtained reproduction speed data V3 is set in the synthesizer 8, thereby adjusting (in this case, lowering) the entire frequency of the audio data, and terminating the present process.

According to this processing, the same effect as in the first embodiment can be obtained with respect to adjustment of the entire frequency of audio data.

Although the first embodiment and the second embodiment have been described as separate forms, they may be combined. That is, the mode of the adjustment processing such as the selection of the left and right of the speaker, the setting of each sound frequency band, and the setting of the whole sound volume according to the first embodiment, and the adjustment processing of the entire frequency of the audio data according to the second embodiment. May be configured so that both modes can be set.

The output characteristics of drawing data and audio data to be adjusted are not limited to those exemplified in the embodiment.

[0072]

As described above, according to the first aspect of the present invention,
According to the audio output method according to the first aspect or the audio output device according to the sixth aspect, since the drawing data is received and the output characteristics of the audio data are adjusted based on the received drawing data, a complicated operation is required. Therefore, the adjustment of the output characteristics of the intended audio data can be easily realized without performing.
In particular, work that depends on vision can be minimized, so that fatigue due to operation can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration of an audio output device according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating a procedure of a drawing data recognition process performed by the apparatus.

FIG. 3 is a flowchart showing a procedure of a sound output process by the device.

FIG. 4 is a flowchart showing a procedure of audio data output characteristic adjustment processing by the device.

FIG. 5 is a diagram illustrating an example of recognized drawing data recognized by the drawing data recognition process performed by the apparatus.

FIG. 6 is a diagram showing an example of a volume setting table in the device.

FIG. 7 is a flowchart illustrating a procedure of an audio data output characteristic adjustment process performed by the audio output device according to the second embodiment of the present invention.

FIG. 8 is a diagram showing an example of recognized drawing data recognized by a drawing data recognition process performed by the apparatus.

[Explanation of symbols]

 Reference Signs List 1 CPU 2 input pen 3 transparent digitizer 4 input interface 8 synthesizer 9L speaker 9R speaker 10 sound generator 12 storage unit 13 drawing data buffer 14 RAM 15 sound data buffer

Claims (10)

[Claims] 1. An audio output method for outputting audio data, comprising: a receiving step of receiving drawing data; and an adjusting step of adjusting an output characteristic of the audio data based on the drawing data received in the receiving step. An audio output method characterized by the following. 2. The audio output method according to claim 1, wherein the output characteristics of the audio data include at least one of a volume and a frequency. 3. A recognition step of recognizing a diagram related to the drawing data received in the receiving step, wherein the adjusting step includes adjusting the sound volume according to a shape of the diagram recognized in the recognition step. 3. The audio output method according to claim 2, further comprising a sound volume increasing / decreasing step of increasing / decreasing for each frequency band. 4. A recognition step for recognizing a diagram relating to the drawing data received in the receiving step, wherein the adjusting step includes the step of recognizing the voice data in accordance with the size of the diagram recognized in the recognition step. 3. The audio output method according to claim 2, further comprising a frequency raising / lowering step of raising / lowering the entire frequency. 5. An output step of outputting the audio data to a plurality of speakers, and a drawing direction recognition step of recognizing a drawing direction of a diagram related to the drawing data received in the receiving step, wherein the adjusting step is And an individual adjustment step of individually adjusting output characteristics of audio data output to the plurality of speakers according to the drawing direction of the diagram recognized in the drawing direction recognition step. The audio output method according to any one of claims 1 to 4. 6. An audio output device for outputting audio data, comprising: receiving means for receiving drawing data; and adjusting means for adjusting an output characteristic of the audio data based on the drawing data received by the receiving means. An audio output device characterized by the following. 7. The audio output device according to claim 6, wherein the output characteristics of the audio data include at least one of a volume and a frequency. 8. A recognizing device for recognizing a diagram related to drawing data received by the receiving device, wherein the adjusting device adjusts the volume according to a shape of the diagram recognized by the recognizing device. 8. The audio output device according to claim 7, further comprising a volume increasing / decreasing unit that increases / decreases for each frequency band. 9. An image processing apparatus comprising: a recognition unit configured to recognize a diagram related to drawing data received by the reception unit; and the adjustment unit configured to generate the voice data according to a size of the diagram recognized by the recognition unit. 8. The audio output device according to claim 7, further comprising frequency raising / lowering means for raising / lowering the entire frequency. 10. An output unit for outputting the audio data to a plurality of speakers, and a drawing direction recognizing unit for recognizing a drawing direction of a diagram related to the drawing data received by the receiving unit. And an individual adjusting unit for individually adjusting output characteristics of audio data output to the plurality of speakers in accordance with the drawing direction of the diagram recognized by the drawing direction recognizing unit. The audio output device according to any one of claims 6 to 9.