Control device, sound switching method of control device, and program

A control device may include a control unit to switch an output information to a predetermined output information, when a transition of contents of a controlled device is detected.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority from Japanese Patent Application No. 2011-022068 filed in the Japan Patent Office on Feb. 3, 2011, the entire content of which is hereby incorporated by reference.

BACKGROUND

The present disclosure relates to a control device, a sound switching method of a control device, and a program.

A cooperative system including a controlled device such as a television or a recorder and a control device such as a commander for controlling the controlled device has been known. In the cooperative system, a cooperation process, for example, for reproducing contents that are related to each other is sometimes performed between the controlled device and the control device.

Meanwhile, the controlled device sometimes operates in a state in which two or more types of sounds are switchable. This is the case of reproducing a single content including data of the main sound and a sub sound or the case of simultaneously reproducing two contents as the main screen and a sub screen. In such a case, the controlled device typically outputs any one of the main sound and the sub sound or outputs any one of the sound of the main screen content and the sound of the sub screen content.

Of course, the controlled device can simultaneously output the main sound and the sub sound or can simultaneously output the sound of the main screen content and the sound of the sub screen content. However, in such a case, two or more types of sounds may be mixed, and it may be difficult to listen to the desired sound. Meanwhile, for example, when plural users watch one or more of the contents reproduced by the controlled device, there may be a case in which the users may want to listen to different types of sound.

SUMMARY

In light of the foregoing, it is desirable to provide a control device, a sound switching method of a control device, and a program which are capable of switching an output sound to a predetermined sound according to a contents-reproduction status of a controlled device.

In accordance with an embodiment, a control device may include a control unit to switch an output information to a predetermined output information, when a transition of contents of a controlled device is detected.

In accordance with another embodiment, a control method may include switching, by a processor, of an output information to a predetermined output information, when a transition of contents of a controlled device is detected.

In accordance with another embodiment, a non-transitory recording medium may be recorded with a computer readable program executable by a computer, where the program includes switching of an output information to a predetermined output information, when a transition of contents of a controlled device is detected.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[1. Overview of Cooperative System]

First, an overview of a cooperative system according to the present disclosure will be described with reference toFIGS. 1 and 2.FIG. 1is a diagram illustrating the overview of the cooperative system according to the present disclosure, andFIG. 2is a flowchart illustrating a sound switching method of a commander20according to the present disclosure.

As illustrated inFIG. 1, the cooperative system includes a controlled device (a television10) and a control device (a commander20) for controlling the controlled device. The controlled device and the control device can communicate with each other through a wired or wireless communication line or through a network according to the circumstances. The controlled device is a device capable of reproducing contents such as a television, a recorder, or a personal computer (PC). The control device is a device capable of outputting (reproducing) at least the sound of the contents such as a commander, a mobile phone, a personal digital assistant (PDA), or a PC. A description will be made below in connection with a case in which the controlled device is the television10, and the control device is the commander20operated by a user U.

The television10reproduces contents and outputs a video and a sound of the contents. The commander20reproduces contents and outputs a sound of the contents. The commander20also outputs a video according to circumstances. The television10performs contents switching or sound switching, and the commander20performs sound switching according to a reproduction status of contents by the television10. The commander20receives contents data from the television10and detects the reproduction status of the contents by the television10. In an example illustrated inFIG. 1, at the time of reproduction of multiplex-sound contents, the television10outputs a main sound (for example, Japanese), and the commander20outputs a sub sound (for example, English).

The television10and the commander20illustrated inFIG. 1correspond to a television110and a commander120illustrated inFIG. 3or a television210and a commander220illustrated inFIG. 8, which will be described later, respectively.

As illustrated inFIG. 2, the commander20detects the reproduction status of the contents by the television10(step S11) and determines whether or not the television10is in a sound switchable status (step S13). Then, when the condition is satisfied, a subsequent process is performed, whereas when the condition is not satisfied, the detection and determination of the reproduction status (steps S11and S13) are repeated.

When the television10is in the sound switchable status, it is determined whether or not the television10has just transitioned to the sound switchable status, that is, whether or not it is directly after the television10has entered the sound switchable status (step S15). Then, when the condition is satisfied, an output sound of the commander20is switched to a predetermined sound (step S17).

Further, when the television10is in the sound switchable status, the reproduction status of contents by the television10is detected (step S19), and it is determined whether or not the television10has performed the sound switching (step S21). When the condition is satisfied, the output sound of the commander20is switched to a predetermined sound (step S23). However, when the condition is not satisfied, the process restarts from the beginning (step S11).

As described above, when the television10transitions to the sound switchable status or performs the sound switching, the output sound of the commander20is switched to a predetermined sound. That is, the commander20can switch the output sound to the predetermined sound according to the reproduction status of contents by the television10. For example, an output sound different from the output sound of the television10may be set as the predetermined sound.

[2-1. Configuration of Cooperative System According to First Embodiment]

Next, the configuration of a cooperative system according to a first embodiment of the present disclosure will be described with reference toFIG. 3.FIG. 3is a block diagram illustrating the functional configuration of the cooperative system according to the first embodiment of the present disclosure. As illustrated inFIG. 3, the cooperative system includes a television110and a commander120which can communicate with each other through a wired or wireless communication line.

The television110includes a contents receiving unit111, an operation input unit112, a sound/subtitle switching unit113, a reproduction processing unit114, a speaker115, a display116, a contents providing unit117, and a status notifying unit118.

The contents receiving unit111receives the contents data through an antenna (not shown) or a network and provides the reproduction processing unit114with the received contents data. The contents receiving unit111switches the reception of the contents data automatically according to a time table of the contents or a contents switching command which will be described later.

The contents data includes at least sound data. As the contents, there may be received as single-sound contents including only main sound data as the sound data or multiplex-sound contents including data of at least the main sound and the sub sound. According to the circumstances, subtitle/sound contents further including subtitle data of the main sound and the sub sound may be received as the contents.

The operation input unit112may be configured with a receiving device that receives an operation signal from operation buttons of the television110body or the like and/or the commander120or a television110remote controller. The operation input unit112receives an operation command from the user. The operation input unit112instructs the contents receiving unit111to perform contents switching in response to a contents switching command and instructs the sound/subtitle switching unit113to perform sound/subtitle switching in response to a sound/subtitle switching command. Through the sound/subtitle switching command, the main sound, the sub sound, or mute is designated as an output sound, and a main sound subtitle, a sub sound subtitle, or subtitle hidden is designated as an output subtitle.

The sound/subtitle switching unit113stores a setting value of an output sound/subtitle of the television110. The setting value is designated by the sound/subtitle switching command. When the setting value is changed, the sound/subtitle switching unit113notifies the status notifying unit118of a changed setting value.

The reproduction processing unit114performs a reproduction process of the contents data and provides the speaker115and the display116with a processing result. The reproduction processing unit114determines the type of contents by analyzing the contents data, extracts video data and sound data from the contents data, and extracts subtitle data according to circumstances. The sound data and the subtitle data are extracted according to the setting value of the output sound/subtitle. When the type of contents is changed, the contents switching is notified to the sound/subtitle switching unit113and the status notifying unit118.

The speaker115outputs a sound corresponding to the extracted sound data, and the display116outputs a video corresponding to the extracted video data and a subtitle corresponding to the extracted subtitle data.

The contents providing unit117transmits at least a part of the contents data to the commander120. For example, the contents providing unit117receives the setting value of the output sound/subtitle of the commander120which will be described later from the commander120, acquires the sound data/subtitle data corresponding to the setting value of the output sound/subtitle from the reproduction processing unit114, and transmits the sound data/subtitle data to the commander120. Alternatively, the contents providing unit117may transmit the contents data received by the contents receiving unit111to the commander120as it is.

The status notifying unit118generates status information representing contents switching or sound/subtitle switching and notifies the commander120of the status information (transmits the status information to the commander120). The status information may be periodically transmitted in response to polling from the commander120or may be transmitted in response to contents switching or sound/subtitle switching as necessary.

The commander120includes a contents acquiring unit121, an operation input unit122, a sound/subtitle setting unit (an output setting unit)123, a sound/subtitle switching unit (an output switching unit)124, a reproduction processing unit125, a speaker126, a display127, and a status detecting unit128.

The contents acquiring unit121receives at least a part of the contents data from the television110and provides the reproduction processing unit125with a reception result. For example, the contents acquiring unit121may transmit the setting value of the output sound/subtitle of the commander120to the television110and receive the sound data/subtitle data corresponding to the setting value of the output sound/subtitle from the television110. Alternatively, the contents acquiring unit121may receive the contents data from the television110as it is. The contents data or the sound data/subtitle data may be acquired from another controlled device or an external device instead of the television110.

The operation input unit122is configured with operation buttons of the commander120and/or graphical user interface (GUI) buttons displayed on the display127of the commander120and receives an operation command from the user U. The operation input unit122instructs the sound/subtitle setting unit123to perform the setting of the output sound/subtitle in response to the sound/subtitle setting command and receives the user U's operation input for selecting the output sound/subtitle, for example, through a GUI menu which will be described later. Further, when the commander120includes a touch panel, part of the operation input unit122may be formed integrally with the display127so as to receive an operation input through the touch panel.

The sound/subtitle setting unit123stores a default setting value of the output sound/subtitle of the commander120. The default value specifies the output sound/subtitle of the commander120that is switched according to the reproduction status of contents by the television110and may be set through the sound/subtitle setting command.

The sound/subtitle switching unit124stores a current setting value of the output sound/subtitle of the commander120. The current value is changed according to the contents switching or the sound/subtitle switching of the television110based on the status information notified from the television110. The current value is changed to a default value when the default value is set, but the current value is changed in response to the user U's operation input when the default value is not set.

The reproduction processing unit125performs a reproduction process on at least a part of the contents data and provides the speaker126and/or the display127with a processing result. The reproduction processing unit125performs predetermined processing on the sound data/subtitle data corresponding to setting of the output sound/subtitle of the commander120. Alternatively, the reproduction processing unit125extracts video data and sound data from the contents data and extracts subtitle data according to the circumstances. In particular, the sound data and the subtitle data are extracted according to the current setting value of the output sound/subtitle stored in the sound/subtitle switching unit124.

The speaker126outputs a sound corresponding to the sound data designated by the current setting value of the output sound/subtitle. The display127outputs a video corresponding to the video data and a subtitle corresponding to the subtitle data designated by the current setting value of the output sound/subtitle.

The status detecting unit128receives the status information representing contents switching or sound/subtitle switching of the television110from the television110and notifies the sound/subtitle switching unit124of the status information.

The components of the television110and the commander120are configured with hardware such as a logic circuit and/or software such as a program. For example, the component configured with software may be implemented by executing a program on a central processing unit (CPU) (not shown).

[2-2. Operation of Cooperative System According to First Embodiment]

Next, the operation of the commander120according to the first embodiment will be described with reference toFIGS. 4 to 7.FIG. 4is a flowchart illustrating the operation of the commander120according to the first embodiment.FIG. 5is a diagram illustrating an example of a sound switching status.FIG. 6is a diagram illustrating an example of a GUI menu used for sound switching.FIG. 7is a diagram illustrating an example of a subtitle switching status.

As illustrated inFIG. 4, the status detecting unit128acquires the status information from the television110(step S111). The sound/subtitle switching unit124determines whether or not the television110is in the sound switchable status based on the status information. For example, the sound/subtitle switching unit124determines whether or not the television110is reproducing the multiplex-sound contents (step S113). Then, the commander120performs a subsequent process when the condition is satisfied but repeats the detection and determination of the reproduction status when the condition is not satisfied (steps S111and S113).

When the television110is in the sound switchable status, the sound/subtitle switching unit124determines whether or not it is directly after the television110has transitioned to the sound switchable status. For example, the sound/subtitle switching unit124determines whether or not it is directly after the television110has started reproducing the multiplex-sound contents (step S115). Then, when the condition is satisfied, the commander120switches the output sound of the commander120to a predetermined sound and switches the output subtitle to a predetermined subtitle according to the circumstances (step S117).

Further, when the television110is in the sound switchable status, the status detecting unit128acquires the status information from the television110(step S119). The sound/subtitle switching unit124determines whether or not the television110performs sound switching based on the status information (step S121). Then, when the condition is satisfied, the commander120switches the output sound of the commander120to a predetermined sound and switches the output subtitle to a predetermined subtitle according to the circumstances (step S123).

InFIG. 5, the output sound of the television110is illustrated together with the television110, and the output sound of the commander120is illustrated together with the commander120. In the example illustrated inFIG. 5, in the television110, the output setting value on the multiplex-sound contents is set to “main sound”. Further, in the commander120, “sub sound”, “main sound”, and “sub sound” are set as default values on the output sounds “main sound”, “sub sound”, and “mute” of the television110, respectively. For example, the sound data of the multiplex-sound contents include main sound data of Japanese and sub sound data of English.

For example, outputting setting may be performed by designating the output sound of the commander120for each output sound of the television110using a GUI menu illustrated in status ST61ofFIG. 6. Through the menu, any one of output sounds “main sound”, “sub sound”, and “mute” displayed on a list box M121is selected for each output sound of the television110.

In status ST51, the television110is reproducing single-sound contents and outputting the main sound of the contents. For example, in the commander120, it is assumed that the default value of the single-sound contents is set to “mute”. For this reason, the commander120does not output the sound of the contents.

In status ST52, the television110switches the contents to the multiplex-sound contents and outputs the main sound of the contents according to the output setting value of the multiplex-sound contents. The commander120detects contents switching by the television110, switches the output sound to the sub sound according to the default value of the multiplex-sound contents, and outputs the sub sound of the contents.

When the default value has been set, for example, sound switching may be performed using a GUI menu as illustrated in status ST62ofFIG. 6after the user U confirms the sound switching. In this GUI, the sound switching is executed when a “Yes” button M122is pressed down, whereas the sound switching is canceled when a “No” button M123is pressed down.

In status ST53, the television110switches the output sound to the sub sound and outputs the sub sound of the contents. The commander120detects the sound switching by the television110, switches the output sound to the main sound according to the default value, and outputs the main sound of the contents.

In status ST54, the television110switches the output sound to mute and does not output the sound of the contents. The commander120detects the mute switching of the television110as the sound switching, switches the output sound to the sub sound according to the default value, and outputs the sub sound of the contents.

FIG. 5illustrates one form of sound switching, and sound switching may be performed in another form. For example, the example illustrated inFIG. 5has been described in connection with the case in which sound switching is performed based on the default value. However, sound switching may be performed without using the default value or may be performed using the default value only on a specific output sound of the television110.

Here, when the default value has not been set, for example, sound switching may be performed by having the user U to select the type of output sound using a GUI menu illustrated in status ST63ofFIG. 6. When any one of “main sound”, “sub sound”, and “mute” buttons M124, M125, and M126is selected in this menu, sound switching to the selected output sound is performed.

InFIG. 7, an output sound/subtitle of the television110is illustrated together with the television110, and an output sound/subtitle of the commander120is illustrated together with the commander120. In the example illustrated inFIG. 7, in the television110, the output setting value on subtitle/sound contents is set to “main sound”. Further, in the commander120, the default values on the output sounds “main sound”, “sub sound”, and “mute” of the television110are set to “main sound, main sound subtitle”, “sub sound, sub sound subtitle”, and “mute, subtitle hidden”, respectively. The output setting may be performed by designating the output sound/subtitle of the commander120for each of the output sounds of the television110. Further, the output setting may be performed by designating only the output subtitle.

In status ST71, the television110is reproducing single-sound contents and outputting the main sound of the contents. For example, in the commander120, it is assumed that the default value of the single-sound contents is set to “mute”. For this reason, the commander120does not output the sound of the contents.

In status ST72, the television110switches the contents to the subtitle/sound contents and outputs the main sound of the contents according to the default value of the subtitle/sound contents. The commander120detects the contents switching by the television110, switches the output sound to the main sound and the output subtitle to the main sound subtitle according to the default value of the subtitle/sound contents, and outputs the main sound and the main sound subtitle of the contents. When the default value has been set, the subtitle switching may be performed after the user U confirms the subtitle switching similarly to the first embodiment.

In status ST73, the television110switches the output sound to the sub sound and outputs the sub sound of the contents. The commander120detects the sound switching by the television110, switches the output sound to the sub sound and the output subtitle to the sub sound subtitle according to the default value, and outputs the sub sound and the sub sound subtitle of the contents.

In status ST74, the television110switches the output sound to mute and the output subtitle to the main sound subtitle and outputs the main sound subtitle of the contents. The commander120detects the mute switching of the television110as the sound switching, switches the output sound to mute and the output subtitle to subtitle hidden according to the default value, and does not output the sound and the subtitle of the contents.

FIG. 7illustrates one form of subtitle switching, and subtitle switching may be performed in another form. For example, the example illustrated inFIG. 7has been described in connection with the case in which subtitle switching is performed based on the default value. However, subtitle switching may be performed without using the default value or may be performed using the default value only on a specific output sound of the television110. When the default value has not been set, subtitle switching may be performed by having the user U to select the type of output subtitle similarly to the first embodiment. Further, when the output subtitle of the television110is switched to the main sound subtitle, the output sound of the commander120may be switched to the sub sound, and the output subtitle may be switched to the sub subtitle. That is, the output sound and the output subtitle of the commander120may be switched according to the switching of the output subtitle by the television110.

As described above, according to the commander120of the first embodiment, when the television110transitions to the sound switchable status (reproduction of the multiplex-sound contents) or performs the sound switching, the output sound of the commander120is switched to a predetermined sound, and the output subtitle is switched to a predetermined subtitle according to the circumstances. That is, the commander120can switch the output sound/subtitle to a predetermined sound/subtitle according to the reproduction status of contents by the television110. For example, when plural users U view contents reproduced by the television110, the user U who desires to listen to the sound/subtitle that is not output from the television110can enjoy the content while listening to a desired sound/subtitle by appropriately setting the output sound/subtitle of the commander120.

[3-1. Configuration of Cooperative System According to Second Embodiment]

Next, a configuration of a cooperative system according to a second embodiment of the present disclosure will be described with reference toFIG. 8.FIG. 8is a block diagram illustrating a functional configuration of the cooperative system according to the second embodiment of the present disclosure. As illustrated inFIG. 8, the cooperative system includes a television210and a commander220. The television210has a function capable of simultaneously displaying two or more contents, and the commander220switches the output sound to a predetermined sound according to the reproduction status of the two or more contents by the television210. A duplicated description with the first embodiment will be omitted below.

The television210operates in a single-screen mode or a multi-screen mode. One content is reproduced in the single-screen mode, and for example, two contents of the main screen contents and the sub screen contents are simultaneously reproduced in the multi-screen mode. The television210can perform the switching between the single-screen mode and the multi-screen mode (screen mode switching). Further, the television210can perform mutual switching between the main screen contents and the sub screen contents (main/sub screen switching). Of course, independent switching of main screen contents or sub screen contents (contents switching) may be performed.

The television210includes a contents receiving unit211, an operation input unit212, a sound switching unit213, a reproduction processing unit214, a speaker215, a display216, a contents providing unit217, and a status notifying unit218.

The contents receiving unit211receives contents data of the main screen contents in the single-screen mode or receives contents data of the main screen contents and the sub screen contents in the multi-screen mode. The contents receiving unit211provides the reproduction processing unit214with the reception results. The contents data includes at least sound data. The contents may be any one of the single-sound contents, the multiplex-sound contents, and the subtitle/sound contents, but the following description will be made in connection with a case in which the contents is the single-sound contents.

The operation input unit212instructs the contents receiving unit211and the reproduction processing unit214to perform the screen mode switching according to a screen mode switching command and instructs the reproduction processing unit214to perform the main/sub screen switching according to a main/sub screen switching command. The operation input unit212instructs the contents receiving unit211to perform contents switching according to a contents switching command and instructs the sound switching unit213to perform the sound switching according to a sound switching command.

The sound switching unit213stores a setting value of an output sound of the television210. The setting value is changed according to the screen mode switching, the main/sub screen switching, the contents switching, or the sound switching. In the case of the sound switching, the setting value is designated by the sound switching command. When the setting value is changed, the sound switching unit213notifies the status notifying unit218of a changed setting value.

In the single-screen mode, the reproduction processing unit214extracts the video data and the sound data of the main screen contents from the contents data. In the multi-screen mode, the reproduction processing unit214extracts the video data of the main screen contents and the sub screen contents from the contents data and extracts the sound data of the main screen contents or the sub screen contents according to a current output setting value. When the screen mode switching, the main/sub screen switching, or the contents switching is performed, the switching is notified to the sound switching unit213and the status notifying unit218.

The status notifying unit218generates the status information representing the screen mode switching, the main/sub screen switching, the contents switching, or the sound switching and notifies the commander220of the status information (transmits the status information to the commander220). The status information may be periodically transmitted according to polling from the commander220or may be transmitted according to the switching as necessary.

The commander220includes a contents acquiring unit221, an operation input unit222, a sound setting unit (an output setting unit)223, a sound switching unit (an output switching unit)224, a reproduction processing unit225, a speaker226, a display227, and a status detecting228.

The sound setting unit223stores a default setting value of the output sound of the commander220. The default value specifies the output sound of the commander220that is switched according to the reproduction status of the contents by the television210and can be set by the sound setting command.

The sound switching unit224stores a current setting value of the output sound of the commander220. The current value is changed according to the screen mode switching, the main/sub screen switching, the contents switching, or the sound switching in the television210based on the status information notified from the television210. The current value is changed to a default value when the default value is set, but the current value is changed in response to the user U's operation input when the default value is not set.

The reproduction processing unit225performs predetermined processing on the sound data corresponding to the setting of the output sound of the commander220. Alternatively, the reproduction processing unit225extracts the video data and the sound data from the contents data. In particular, the sound data is extracted according to the current output setting value stored in the sound switching unit224.

The status detecting unit228receives the status information representing the screen mode switching, the main/sub screen switching, the contents switching, or the sound switching in the television210from the television210and notifies the sound switching unit224of the status information.

[3-2. Operation of Cooperative System According to Second Embodiment]

Next, an operation of the commander220according to the second embodiment will be described with reference toFIGS. 9 and 10.FIG. 9is a flowchart illustrating an operation of the commander220according to the second embodiment.FIG. 10is a diagram illustrating an example of a sound switching status.

As illustrated inFIG. 9, the status detecting unit228acquires the status information from the television210(step S211). The sound switching unit224determines whether or not the television210is in the sound switchable status based on the status information. For example, the sound switching unit224determines whether or not the television210is simultaneously reproducing two or more contents in the multi-screen mode (step S213). Then, the commander220performs a subsequent process when the condition is satisfied but repeats the detection and determination of the reproduction status when the condition is not satisfied (steps S211and S213).

When the television210is in the sound switchable status, the sound switching unit224determines whether or not it is directly after the television210has transitioned to the sound switchable status. For example, the sound switching unit224determines whether or not it is directly after the television210has started reproducing two or more contents in the multi-screen mode at the same time (step S215). Then, when the condition is satisfied, the commander220switches the output sound of the commander220to a predetermined sound (step S217).

Further, when the television210is in the sound switchable status, the status detecting unit228acquires the status information from the television210(step S219). The sound switching unit224determines whether or not the television210has performed sound switching based on the status information (the sound switching by the main/sub screen switching or the content switching is also included) (step S221). Then, when the condition is satisfied, the commander220switches the output sound of the commander220to a predetermined sound (step S223).

FIG. 10illustrates an example of a sound switching status. In the multi-screen mode, for example, one of weather forecast contents and news contents is displayed on a main screen set on the whole display area, and the other is displayed on a sub screen set on an upper right portion of the display area. Setting of the display area and the type of contents displayed on multiple screens are not limited to the examples illustrated inFIG. 10.

InFIG. 10, the output sound of the television210is illustrated together with the television210, and the output sound of the commander220is illustrated together with the commander220. In the example illustrated inFIG. 10, in the television210, the output setting value of the multi-screen mode is set to “main screen sound”. Further, in the commander220, “sub screen sound”, “main screen sound”, and “sub screen sound” are set as default values on the output sounds “main screen sound”, “sub screen sound”, and “mute” of the television210, respectively. The main screen sound refers to a sound of the main screen contents and the sub screen sound refers to a sound of the sub screen contents. Output setting is performed by designating the output sound of the commander220for each output sound of the television210.

In status ST101, the television210is in the single-screen mode and reproducing the main screen sound (sound of weather forecast contents). For example, in the commander220, it is assumed that the default value of the single-screen mode is set to “mute”. For this reason, the commander220does not output the sound.

In status ST102, the television210switches the screen mode to the multi-screen mode and outputs the main screen sound (sound of weather forecast contents) according to the default value of the multi-screen mode. The commander220detects the screen mode switching by the television210, switches the output sound to the sub screen sound according to the default value of the multi-screen mode, and outputs the sub screen sound (sound of news contents). When the default value has been set, the sound switching may be performed after the user U confirms sound switching similarly to the first embodiment.

In status ST103, the television210switches the main screen and the sub screen to each other by main/sub screen switching and outputs the main screen sound (sound of news contents) after screen switching according to the default value. The commander220detects the sound switching by the main/sub screen switching by the television210, switches the output sound to the sub screen sound after the main/sub screen switching according to the default value, and outputs the sub screen sound (sound of weather forecast contents).

In status ST104, the television210switches the output sound to the sub screen sound and outputs the sub screen sound (sound of weather forecast contents). The commander220detects the sound switching by the television210, switches the output sound to the main screen sound according to the default value, and outputs the main screen sound (sound of news contents).

In status ST105, the television210switches the output sound to mute and does not output the sound. The commander220detects the mute switching of the television210as sound switching, switches the output sound to the sub screen sound according to the default value, and outputs the sub screen sound (sound of weather forecast contents).

FIG. 10illustrates one form of sound switching, and sound switching may be performed in another form. For example, the example illustrated inFIG. 10has been described in connection with the case in which sound switching is performed based on the default value. However, sound switching may be performed without using the default value or may be performed using the default value only on a specific output sound of the television210. When the default value has not been set, sound switching may be performed by having the user U to select the type of output sound.

As described above, according to the commander220of the second embodiment, when the television210transitions to the sound switchable status (simultaneous reproduction of two or more contents) or performs sound switching, the output sound of the commander220is switched to a predetermined sound. Thus, the commander220can switch the output sound to a predetermined sound according to the reproduction status of contents by the television210. For example, when plural users U view two or more contents reproduced by the television210, the user U who desires to listen to the sound that is not output from the television210can enjoy the contents by a desired sound by appropriately setting the output sound of the commander220.

For example, the above embodiments have been described in connection with the case in which the cooperative system includes the television110or210and one commander120or220. However, the above embodiment can be similarly applied even when the cooperative system includes the television110and two or more commanders. In this case, in the two or more commanders, different output sounds/subtitles may be set.

For example, the second embodiment has been described in connection with sounds of two contents of main screen contents and sub screen contents are switched. However, sounds of three or more contents may be switched. In the second embodiment, there may be reproduced contents that do not include video data, that is, contents that do not include a video which is to be displayed on any one of multiple screens. Further, when multiplex-sound contents or subtitle/sound contents are reproduced in the multi-screen mode, for example, the television210may output the main sound of the main screen contents, and the commander220may output the sub sound of the sub screen contents or the main sound subtitle of the main screen contents.

It should be noted that the present disclosure can also take the following configurations.

a status detecting unit that detects a reproduction status of one or more contents by a controlled device; and

an output switching unit that switches an output sound of the control device to a predetermined sound when transition or sound switching of the controlled device to a sound switchable status is detected.

[2]. The control device according to [1],

wherein the output switching unit switches the output sound of the control device to a sound different from the output sound of the controlled device.

[3]. The control device according to [1],

wherein the status detecting unit detects reproduction start of multiplex-sound contents by the controlled device as the transition to the sound switchable status.

[4]. The control device according to [1],

wherein the status detecting unit detects start of simultaneous reproduction of two or more contents by the controlled device as the transition to the sound switchable status.

[5]. The control device according to [1],

wherein the status detecting unit detects mute of the output sound of the controlled device in the sound switchable status as the sound switching.

[6]. The control device according to [1], further comprising:

an output setting unit that sets in advance the output sound of the control device on the output sound of the controlled device,

wherein the output switching unit switches the output sound of the control device to the previously set sound according to the output sound of the controlled device.

[7]. The control device according to [1],

wherein the output switching unit switches an output subtitle of the control device to a predetermined subtitle when the transition or the sound switching of the controlled device to the sound switchable status is detected.

[8]. The control device according to [7],

wherein the output setting unit set in advance the output subtitle of the control device on the output sound of the controlled device, and

the output switching unit switches the output subtitle of the control device to the previously set subtitle according to the output sound of the controlled device.

[9]. A sound switching method of a control device, comprising:

detecting a reproduction status of one or more contents by a controlled device; and

switching an output sound of the control device to a predetermined sound when transition or sound switching of the controlled device to a sound switchable status is detected.

[10]. A program causing a computer to execute a sound switching method of a control device, the method comprising:

detecting a reproduction status of one or more contents by a controlled device; and

switching an output sound of the control device to a predetermined sound when transition or sound switching of the controlled device to a sound switchable status is detected.