JP5934529B2 - Video display system and terminal device - Google Patents

Description

  The present invention relates to a video display system and a terminal device, and more particularly, to an improvement of a video display system in which two or more video output units are each a part of a common video and display different images.

  There has been proposed a video display system in which a multi-screen screen is formed using a plurality of terminal devices and a video is viewed on a large screen (for example, Patent Document 1). Each terminal device downloads content information consisting of video and audio from a server device on a communication network such as the Internet or a LAN (local area network), and displays different images that are part of a common video. For example, the terminal device cuts out and displays an image area corresponding to the position of the terminal within the multi-screen screen from the image frame constituting the video. According to such a video display system, it is possible to view a video on a large screen as compared with the case of displaying on one terminal device.

  However, in the conventional video display system as described above, when a portable information terminal such as a mobile phone or a tablet terminal is used as the terminal device, there is a problem that the built-in battery is consumed quickly. In particular, a terminal device that performs audio output consumes a large amount of power, so that the internal battery is quickly consumed. Therefore, the viewable time as the video display system is determined by the remaining battery level of the built-in battery of the terminal device that performs audio output, and there is a problem that viewing for a long time cannot be performed.

JP 2008-11475 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a video display system capable of extending the time during which continuous viewing is possible. In particular, an object of the present invention is to provide a video display system that can extend the time for continuous viewing by efficiently using a built-in battery in the system.

  It is another object of the present invention to provide a video display system capable of suppressing the rapid deterioration of a built-in battery due to concentration of audio output in a specific viewing unit. It is another object of the present invention to provide a video display system capable of suppressing the rapid exhaustion of a built-in battery due to concentration of audio output in a specific viewing unit until the remaining battery capacity of the built-in battery decreases. .

  Moreover, an object of this invention is to provide the terminal device which can be used for the above video display systems. In particular, it is an object of the present invention to provide a terminal device capable of continuing voice output as a system even if a built-in battery is exhausted after voice output is assigned. It is another object of the present invention to provide a terminal device that can prevent voice output from concentrating on a specific terminal device and quickly deteriorating the built-in battery.

A video display system according to a first aspect of the present invention includes two or more viewing units each having a built-in battery, a display, and a speaker, and a content providing device that provides content information including video and audio. And a battery level detection means for detecting a battery level of the built-in battery in the viewing unit, wherein the video unit is a part of a common video and displays different images on the display. Battery remaining amount acquisition means for acquiring the remaining battery level from the two or more viewing units; and audio master designation means for designating one of the two or more viewing units as an audio master based on the battery remaining amount; the provided, the specified in the audio master view unit, based on the content information, the video Parts as well as displayed on the display have the line audio output from the speaker, the audio master not specified the viewing unit, without audio output based on the content information, the video based on the content information Is configured to be displayed on the display .

  In this video display system, the remaining battery level of the built-in battery is acquired from each viewing unit, and the audio master is designated based on the remaining battery level of each viewing unit. For this reason, by designating the viewing unit with the largest remaining battery level as the audio master and performing audio output, the time for continuous viewing can be extended. In addition, since the audio master is designated based on the remaining battery level of each viewing unit, it is possible to suppress the deterioration of the built-in battery due to the concentrated audio output on a specific viewing unit.

  In addition to the above configuration, the video display system according to the second aspect of the present invention further includes battery remaining capacity comparing means for comparing the remaining battery capacity with a predetermined determination threshold value, and the remaining battery capacity acquiring means is connected to the audio master. When the remaining battery level of the designated viewing unit falls below the determination threshold, the remaining battery level is acquired again, and the audio master designation unit re- Configured to specify audio master.

  In this video display system, if the remaining battery level of the viewing unit designated as the audio master falls below the determination threshold, the remaining battery level is acquired again and the audio master is designated. For this reason, it is possible to prevent the audio output from being stopped in the entire system just because the remaining battery level of the viewing unit designated as the audio master has decreased. Therefore, by using the built-in battery in the system efficiently, it is possible to lengthen the time for continuous viewing.

  A video display system according to a third aspect of the present invention includes, in addition to the above configuration, master designation counting means for counting the number of times of designation of the audio master, and the battery remaining capacity comparison means is different from the determination threshold value according to the designated number of times Is used to compare the remaining battery levels.

  In this video display system, the audio master is designated again by comparing the determination threshold value and the remaining battery level, which differ depending on the number of times the audio master is designated. For this reason, compared with the case where the same determination threshold value is used, it can suppress that the change of a voice master arises frequently. In addition, by making the determination threshold multi-stage and re-specifying the audio master in this way, the allocation of the audio output can be performed within the system before the remaining battery level of the built-in battery decreases below a certain level. Can be distributed to viewing units. For this reason, it is possible to prevent the sound output from being concentrated on a specific viewing unit and the internal battery from being quickly consumed before the remaining battery capacity of the internal battery decreases.

  A video display system according to a fourth aspect of the present invention includes, in addition to the above-described configuration, master cancellation notification means for notifying the original audio master of master cancellation after designation of the audio master based on the remaining battery level acquired again. The viewing unit designated as the audio master is configured to stop audio output based on the content information based on the notification of master release.

  In this video display system, if the remaining battery level of the viewing unit designated as the audio master falls below the determination threshold, the audio master is designated again, and then the master release notification is sent to the original audio master. In the viewing unit designated as the audio master, it is possible to suppress the audio output from being interrupted every time the audio master is changed by continuing the audio output until notification of master release.

A terminal device according to a fifth aspect of the present invention is a terminal device that is provided with a built-in battery, a display, and a speaker, receives content information consisting of video and audio from the content providing device, and displays a part of the common video, A battery remaining amount detecting means for detecting the remaining battery capacity of the built-in battery, a content receiving means for receiving the content information from the content providing device, and a part of the video on the display based on the received content information If it falls below a video output unit for displaying a battery level comparing means for comparing with a predetermined determination threshold the battery remaining amount, after being designated voice master, the battery is the determination threshold value Master release requesting means for making a request for master release to the content providing device, wherein the content providing device comprises two or more It acquires the battery remaining amount from the end device, based on the obtained the battery level, one of the two or more terminal devices specified above audio master, the video output means, said by the content providing device If specified in the voice master, based on the content information, a portion of the video and displays on the display, performs voice output from the speaker, if not specified in the voice master by the content providing device In addition, audio output based on the content information is not performed, a part of the video is displayed on the display based on the content information, and the video output means is based on the content information after requesting the master release. Configured to stop audio output.

  In this terminal device, content information is received from the content providing device and a part of the video is displayed, and if it is designated as the audio master by the content providing device, an audio output is performed. You can use it to watch the video. In particular, if the remaining battery level of the built-in battery falls below the determination threshold after being designated as the audio master, a request for canceling the master is made to the content providing apparatus. For this reason, in the content providing apparatus, the voice master can be canceled for a terminal apparatus whose remaining battery capacity of the built-in battery is low, and another terminal apparatus with a sufficient remaining battery capacity can be designated as the voice master. In other words, because the content providing device acquires the remaining battery level again based on the request for canceling the master and designates the audio master, the battery level of the terminal device designated as the audio master has decreased. It is possible to prevent the audio output from stopping in the entire system. Therefore, even if the internal battery is exhausted after the audio output is assigned, the audio output can be continued as a system.

A terminal device according to a sixth aspect of the present invention is a terminal device that is provided with a built-in battery, a display, and a speaker, receives content information including video and audio from the content providing device, and displays a part of the common video, A battery remaining amount detecting means for detecting the remaining battery capacity of the built-in battery, a content receiving means for receiving the content information from the content providing device, and a part of the video on the display based on the received content information Based on the video output means to display, the battery remaining amount obtaining means for obtaining the remaining battery amount from another terminal device, the remaining battery amount obtained from the other terminal device and the remaining battery amount of the own terminal, Audio master designation means for designating one of the other terminal device and the own terminal as an audio master, and the video output means includes the sound master If specified in the master, based on the content information, a portion of the video and displays on the display, have rows audio output from the speaker, if not specified in the audio master, the content information Is configured to display a part of the video on the display based on the content information .

  In this terminal device, content information is received from the content providing device and a part of the video is displayed, and if it is designated as the audio master, audio output is performed. Can be viewed. In particular, since one of these terminal devices is designated as the audio master based on the remaining battery level acquired from another terminal device and the remaining battery level of the terminal itself, the audio output is concentrated on a specific terminal device. The deterioration of the built-in battery can be prevented from being accelerated.

  In the video display system according to the present invention, it is possible to increase the time during which continuous viewing is possible. In particular, it is possible to prevent the audio output from being stopped in the entire system just because the remaining battery level of the viewing unit designated as the audio master has decreased. Therefore, by using the built-in battery in the system efficiently, the continuous viewing time can be extended.

  In addition, according to the video display system of the present invention, since the audio master is designated based on the remaining battery level of each viewing unit, it is possible to suppress the rapid deterioration of the internal battery due to the concentrated audio output in a specific viewing unit. can do. Furthermore, it is possible to suppress the rapid exhaustion of the built-in battery due to the concentration of audio output in a specific viewing unit until the remaining battery capacity of the built-in battery decreases.

  Further, according to the present invention, it is possible to provide a terminal device that can be used in the video display system as described above. In particular, it is possible to provide a terminal device capable of continuing sound output as a system even if the built-in battery is exhausted after sound output is assigned. In addition, it is possible to provide a terminal device that can suppress the deterioration of the built-in battery due to the concentrated sound output on a specific terminal device.

1 is a system diagram showing an example of a schematic configuration of a video display system 1 according to Embodiment 1 of the present invention. It is explanatory drawing which showed typically an example of the operation | movement at the time of multiscreen screen formation in the video display system 1 of FIG. FIG. 2 is a block diagram illustrating a configuration example of a client terminal 20 in FIG. 1. It is the block diagram which showed an example of the function structure in CPU25 of FIG. FIG. 2 is a block diagram illustrating a configuration example of a video output control unit 12 in FIG. 1. 5 is a flowchart illustrating an example of an operation of a video output control unit 12 in the server device 10. 4 is a flowchart showing an example of the operation of a CPU 25 in the client terminal 20. It is the block diagram which showed one structural example of the client terminal 20 by Embodiment 2 of this invention, and shows an example of a function structure in CPU25.

Embodiment 1 FIG.
<Video display system 1>
FIG. 1 is a system diagram showing an example of a schematic configuration of a video display system 1 according to Embodiment 1 of the present invention. In this figure, a case where a multi-screen screen is formed using four client terminals 20 is shown.

  The video display system 1 includes a server device 10 that provides content information 2 including video and audio, and two or more client terminals 20. Each client terminal 20 receives the content information 2 and displays a part of the common video. indicate.

  The server device 10 is a content providing device that provides the content information 2, and includes a content storage unit 11, a video output control unit 12, and a network communication unit 13. The video here is a moving image, and the content information 2 is composed of a large number of image frames constituting the moving image and audio data associated with the moving image.

  For example, when a live video is distributed by a multicast method, audio data acquired in synchronization with moving image shooting is provided as the content information 2. In this example, video and audio for live relaying a soccer game from a stadium are provided as content information 2, and the video is displayed on a multi-screen screen formed by four client terminals 20.

  If there is a viewing request for the content information 2 from the client terminal 20, the video output control unit 12 reads the content information 2 from the content storage unit 11 based on the viewing request and outputs it to the network communication unit 13. For example, when forming a multi-screen screen using two or more client terminals 20, the video output control unit 12 first acquires adjacent information regarding the adjacent client terminals 20 from each client terminal 20.

  The adjacent information includes identification information of the own terminal, presence / absence of the client terminal 20 adjacent in the up / down or left / right direction, and identification information of the adjacent client terminal 20. The video output control unit 12 determines the configuration of the client terminal 20 and the arrangement position of each client terminal 20 in the multi-screen screen based on the acquired adjacent information, and notifies each client terminal 20 of the configuration.

  The network communication unit 13 is connected to the communication network 3 such as the Internet or a LAN, and transmits the content information 2 to the requesting client terminal 20 via the communication network 3. The content information 2 is wirelessly transmitted to each client terminal 20 via a wireless AP (access point) 4. The wireless AP 4 is a relay device that relays communication between the server device 10 and the client terminal 20 via the communication network 3 and communication between the client terminals 20.

  The client terminal 20 is a terminal device including a thin casing that uses a built-in battery as a power source, and functions as a viewing unit that forms a multi-screen screen. The client terminal 20 includes a touch panel 21, a microphone 22, and speakers 23R and 23L on the operation surface side of the thin casing, and a secondary battery is mounted as the built-in battery in the thin casing. For example, the client terminal 20 is a portable information terminal such as a mobile phone having a call function or a tablet terminal.

  The touch panel 21 displays a part of the video on the screen and detects a touch operation. The touch panel 21 includes a display that uses the operation surface of the thin casing as a display screen, and a touch sensor that detects a touch operation on the display screen.

  In this example, for each client terminal 20, the display screen of the touch panel 21 has a vertically long rectangular shape, and each client terminal 20 has its display screen oriented in the same direction and the adjacent terminals are in close proximity to each other. Arranged in the direction.

  Therefore, the multi-screen screen formed by these client terminals 20 is wide in the horizontal direction, that is, in the left-right direction when viewed from the operator of the client terminal 20. That is, the image can be enlarged and displayed as compared with the case where the entire video is displayed on one client terminal 20. Also, if the scale is the same, the video can be viewed on a wide screen that is wide in the left-right direction. The arrangement of the client terminals 20 includes a linear two-dimensional array pattern such as 2 rows by 2 columns and 3 rows by 3 columns in addition to the linear one-dimensional array pattern as described above.

  The microphone 22 is an audio input element used during a call. The speakers 23R and 23L are audio output elements used during a call or video display. The speaker 23R is a speaker for outputting the right component of the stereo sound when outputting the stereo sound, and is disposed at the right end of the thin casing. The speaker 23L is a speaker for outputting the left component of the stereo sound when outputting the stereo sound, and is disposed at the left end of the thin casing. In this example, the microphone 22 is disposed at the upper end of the thin casing, and the speakers 23R and 23L are disposed at the lower end of the thin casing.

  For example, when forming a multi-screen screen, the client terminal 20 uses the content information 2 downloaded from the server device 10 and the image frame constituting the moving image based on the arrangement position notified from the server device 10 to the multi-screen. An image area corresponding to the position of the own terminal in the screen is cut out and displayed on the touch panel 21.

  In this video display system 1, the server apparatus 10 acquires the remaining battery level of the built-in battery from each client terminal 20 in order to efficiently use the built-in battery in the system and view the video, and is responsible for audio output. The terminal device to be specified is designated as the audio master. The battery remaining amount is an accumulated charge amount in the built-in battery, and is detected by the client terminal 20. The audio master is designated based on such a remaining battery level, and the client terminal 20 designated as the audio master performs audio output from the speakers 23R and 23L based on the content information 2 downloaded from the server device 10.

<Audio master>
FIG. 2 is an explanatory diagram schematically showing an example of the operation when forming the multi-screen screen in the video display system 1 of FIG. The (a) of the figure, the battery remaining amount at time t ₁ in the display image is shown for each client terminal 20, (b), the battery level at time t ₂ after time t ₁ It is shown.

  Each client terminal 20 downloads content information 2 including a common video from the server device 10, cuts out an image area corresponding to the position of the terminal from the video, and displays the image area on the touch panel 21. For example, the terminal A arranged on the leftmost side divides the video into four image areas which are rectangular image areas and are adjacent to each other in the left-right direction, and displays the leftmost image area on the touch panel 21.

  Terminal B arranged second from the left displays the second image region from the left among the four image regions. The terminal C arranged third from the left displays the third image area from the left among the four image areas. The terminal D arranged fourth from the left displays the fourth image region from the left among the four image regions.

  In this way, by dividing the common video and displaying it on each client terminal 20, it is possible to form a multi-screen screen having a larger screen size than the display screen of the client terminal 20.

  On the other hand, the audio data included in the content information 2 downloaded from the server device 10 is acoustic information common to each image region cut out from the video. For this reason, no matter what the client terminal 20 performs the sound output, if the operator is away from the client terminal 20 to some extent, the sound can be heard without any sense of incongruity.

  Therefore, in this video display system 1, the server device 10 compares the remaining battery levels of the client terminals 20, and designates one of the client terminals 20 as the audio master based on the comparison result. For example, the client terminal 20 with the largest remaining battery capacity is designated as the audio master.

  Here, when a plurality of terminal devices are extracted as the client terminal 20 having the largest remaining battery level, one of the terminal devices is designated as the audio master according to a predetermined rule, and two or more client terminals 20 are selected. Shall not be designated as voice masters at the same time.

  Only the client terminal 20 designated as such an audio master performs audio output using the speakers 23R and 23L, and the other client terminals 20 maintain a so-called mute state in which the audio output is cut off. By configuring in this way, it is possible to suppress the rapid deterioration of the built-in battery due to the concentration of audio output on a specific client terminal 20.

At time _{t 1,} the terminal to D, the ratio of the battery level for when fully charged, 100% respectively, 90%, 80%, 70%, in this state, the terminal A is designated to the audio master . The terminal A designated as the audio master starts audio output using the speakers 23R and 23L based on the content information 2 downloaded from the server device 10, and monitors the remaining battery level of the built-in battery. Then, if the remaining battery level falls below a predetermined determination threshold value Th1, the terminal A notifies the server device 10 that the remaining battery level has fallen below the determination threshold value Th1, and requests the designation cancellation of the voice master.

  When the server device 10 is notified from the terminal A that the remaining battery level has fallen below the determination threshold Th1, the server device 10 obtains the remaining battery level from the terminals A to D again and designates the audio master. By re-designating the audio master, it is possible to prevent the audio output from stopping in the entire system just because the remaining battery level of the terminal device designated as the audio master has decreased.

  The client device 20 newly designated as the audio master is notified from the server device 10 of a determination threshold value Thk that differs depending on the number of times the audio master is designated. For example, a determination threshold value Thk that is gradually reduced as the designated number increases is notified. In this example, when the first audio master is designated, the determination threshold Th1 = 80% is notified to the terminal A, and when the second audio master is designated, the determination threshold Th2 = 60% is notified to the terminal B.

  In this way, by changing the determination threshold Thk according to the designated number of times of the voice master, it is possible to prevent the voice master from being changed more frequently than when the same determination threshold is used. In addition, by making the determination threshold value Thk multi-stage and re-specifying the audio master in this way, the audio output is allocated in the system before the remaining battery level of the built-in battery decreases below a certain level. Can be distributed to the terminal devices.

  After designating a new audio master, the server device 10 notifies the original audio master of the designation cancellation of the audio master. The terminal A stops the audio output based on the master cancellation notification. That is, since the audio output is continued at the terminal A until the designation of the audio master is canceled, it is possible to prevent the audio output from being interrupted every time the audio master is changed.

At time _{t 2, the} the terminal to D, the ratio of remaining battery capacity for fully charged, 79% respectively, 85%, 75%, 65%, in this state, specify the terminal B newly audio master Then, the terminal A is notified of master cancellation.

  The terminal B newly designated as the audio master starts audio output using the speakers 23R and 23L based on the content information 2 downloaded from the server device 10, and monitors the remaining battery level of the built-in battery. If the remaining battery level falls below the determination threshold value Th2, the terminal B notifies the server device 10 that the remaining battery level has fallen below the determination threshold value Th2, and requests the voice master to be dedesignated.

  In this way, the content information 2 is downloaded from the server device 10 to display a part of the video, and if the server device 10 designates the audio master, the audio output is performed, so that the built-in battery in the system can be efficiently used. You can use it to watch the video.

<Client terminal 20>
FIG. 3 is a block diagram showing a configuration example of the client terminal 20 of FIG. The client terminal 20 includes a touch sensor 21a, a display 21b, speakers 23R and 23L, a wireless communication unit 24, a CPU 25, a content storage unit 26, a secondary battery 27, a remaining battery level detection unit 28, a touch operation detection unit 29, and display control. The unit 30 and the audio processing unit 31 are configured.

  The touch sensor 21a is a detection element that detects a touch operation on a detection surface formed on the display screen of the display 21b. For example, the touch sensor 21a is configured by a capacitive surface contact detection element, and a touch operation with a finger is detected. The touch operation detection unit 29 detects the position on the detection surface of the touch operation based on the output of the touch sensor 21a, and outputs the detection result to the CPU 25.

  The display 21b is a display element that displays a menu screen including a plurality of menu icons. For example, the display 21b is configured by a transmissive LCD (liquid crystal display). The display control unit 30 drives the display 21b based on the image data input from the CPU 25. For example, if a menu icon touch operation is performed, an input process corresponding to the operation position of the touch operation is performed.

  The audio processing unit 31 is a signal processing unit for performing amplification of an audio signal, conversion between an analog signal and a digital signal, various filter processes of the audio signal, and separation of the stereo signal into signal components. When an audio signal is input from the CPU 25, the audio processing unit 31 converts it into an analog signal, amplifies it, and outputs it to the speakers 23R and 23L.

  The wireless communication unit 24 is a content receiving unit that communicates with the wireless AP 4 and downloads the content information 2 from the server device 10 via the communication network 3. The downloaded content information 2 is stored in the content storage unit 26.

  The secondary battery 27 is a built-in battery that supplies DC power to the wireless communication unit 24 and the CPU 25, and can be repeatedly charged and discharged. The remaining battery level detection unit 28 detects the remaining battery level of the secondary battery 27 and outputs the detection result to the CPU 25. In addition, instead of the secondary battery 27, a primary battery, a fuel cell, a biological battery, or the like may be used as the built-in battery.

  The CPU 25 is a main control unit that performs communication control, video and audio output control, and various input processes. The CPU 25 displays a part of the video on the display 21b based on the content information 2 downloaded from the server device 10, and outputs audio from the speakers 23R and 23L when the server device 10 is notified of the audio master designation. To do.

  Further, after being designated as the audio master, the CPU 25 monitors the remaining battery level of the secondary battery 27, and if the remaining battery level is less than the determination threshold value Thk, the remaining battery level is determined to the server device 10 by the determination threshold value Thk. And send a request to cancel the master.

  The CPU 25 stops the audio output based on the content information 2 when the server device 10 is notified of the cancellation of the audio master designation. For example, when the audio output is stopped, the power supply to the audio processing unit 31 is interrupted.

  FIG. 4 is a block diagram showing an example of a functional configuration in the CPU 25 of FIG. The CPU 25 includes a video output unit 251, a determination threshold storage unit 252, a remaining battery level comparison unit 253, and a master release request unit 254.

  The video output unit 251 generates image data for displaying a part of the video on the display 21 b based on the downloaded content information 2 and outputs the image data to the display control unit 30. Further, when the designation of the audio master is notified, the video output unit 251 generates audio data for outputting audio from the speakers 23R and 23L based on the content information 2 and outputs the audio data to the audio processing unit 31. In the video output unit 251, when the cancellation of the designation of the audio master is notified, an operation for stopping the audio output based on the content information 2 is performed based on the notification of the cancellation of the master.

  The determination threshold value storage unit 252 holds a determination threshold value Thk (k = 1 to N, where N is an integer equal to or greater than 2) for determining whether or not to cancel the designation of the audio master. These determination threshold values Thk are threshold values for the remaining battery level of the secondary battery 27 and are determined in advance. Further, the determination threshold value Thk varies depending on the designated number k of voice masters.

  Specifically, the relational expression of Thk> Th (k + 1) is established. For example, assuming that the remaining battery level when fully charged is 100%, Th1 = 80%, Th2 = 60%, Th3 = 40%, Th4 = 20%.

  The remaining battery level comparison unit 253 compares the remaining battery level detected by the remaining battery level detection unit 28 with the determination threshold value Thk, and outputs the comparison result to the master release request unit 254. The remaining battery level comparing unit 253 compares the remaining battery level using a determination threshold value Thk corresponding to the designated number k notified when the voice master is designated.

  The master cancellation request unit 254 generates a master cancellation request for requesting the server device 10 to cancel the audio master designation when the remaining battery level falls below the determination threshold Thk after being designated as the audio master. 10 to send.

<Video output control unit 12>
FIG. 5 is a block diagram illustrating a configuration example of the video output control unit 12 of FIG. The video output control unit 12 includes a remaining battery level acquisition unit 121, an audio master designation unit 122, a master allocation storage unit 123, a master designation counting unit 124, a determination threshold notification unit 125, and a master release notification unit 126.

  The remaining battery level acquisition unit 121 acquires the remaining battery level from each client terminal 20 constituting the multi-screen screen. Specifically, if there is a request for viewing the content information 2 from the client terminal 20, a remaining amount request for requesting the client terminal 20 to transmit the remaining battery level is generated and transmitted to each client terminal 20.

  The voice master designation unit 122 generates a master designation for designating any one of the client terminals 20 as a voice master based on the remaining battery level received from each client terminal 20 and notifies the corresponding client terminal 20 of the master designation. .

  The master allocation storage unit 123 holds a master allocation table including master allocation information indicating to which client terminal 20 the audio master has been allocated. This master allocation table is configured by identification information of the client terminal 20, flag information indicating the voice master, and address information for specifying the terminal device on the communication network 3. The master allocation table is updated every time a new audio master is designated or the designation of the audio master is canceled.

  When the battery remaining amount acquiring unit 121 receives a master cancel request from the client terminal 20 designated as the audio master, the battery remaining amount acquiring unit 121 performs an operation of acquiring the battery remaining amount again based on the master cancel request. The audio master designation unit 122 designates the audio master based on the remaining battery remaining amount.

  The master cancellation notifying unit 126 notifies the original voice master of master cancellation for canceling the designation of the voice master, after designating the voice master based on the remaining battery remaining amount.

  The master designation counting unit 124 counts the designated number k of audio masters, and outputs the count result to the determination threshold value notification unit 125. The determination threshold value notification unit 125 selects a determination threshold value Thk corresponding to the specified number of times k, and notifies the client terminal 20 specified as the audio master.

  Steps S101 to S108 in FIG. 6 are flowcharts illustrating an example of the operation of the video output control unit 12 in the server device 10. First, when the battery remaining amount acquiring unit 121 receives a viewing request for the content information 2 from any of the client terminals 20, the battery remaining amount acquiring unit 121 transmits the content information 2 to each client terminal 20 and acquires the remaining battery amount from each client terminal 20. (Step S101).

  The audio master designation unit 122 compares the acquired remaining battery levels to determine the client terminal 20 with the largest remaining battery level, generates a master designation for designating as the audio master, and sends it to the corresponding client terminal 20. Notification is made (steps S102 and S103).

  When a new audio master is designated, the master cancellation notification unit 126 notifies the original audio master of master cancellation (step S104). The voice master designation unit 122 updates the master allocation table when the master cancellation notification is made (step S105).

  Next, if a master cancellation request is received from the client terminal 20, the processing procedure from step S101 to step S105 is repeated (step S106). The processing procedure from step S101 to step S106 is repeated until the end of viewing of the content information 2 is instructed from any of the client terminals 20 (step S107). On the other hand, the end of viewing is notified, and this process ends (step S108).

  Steps S201 to S211 in FIG. 7 are flowcharts illustrating an example of the operation of the CPU 25 in the client terminal 20. First, when the CPU 25 receives a remaining amount request from the server device 10 during the display of the video based on the content information 2, the CPU 25 instructs the remaining battery amount detection unit 28 to detect the remaining battery amount, and the obtained remaining battery amount is obtained. Is transmitted to the requesting server apparatus 10 (steps S201 and S202).

  Next, when the designation of the audio master is notified from the server device 10 (step S203), the video output unit 251 starts audio output based on the content information 2 (step S204). After being designated as the audio master, the remaining battery level comparing unit 253 instructs the remaining battery level detection unit 28 to detect the remaining battery level in order to monitor the remaining battery level. Compare with Thk (steps S205 and S206).

  If the remaining battery level is below the determination threshold Thk, the master cancellation request unit 254 generates a master cancellation request and transmits it to the server device 10 (step S207). Next, if there is a master release notification from the server device 10, the video output unit 251 stops audio output based on the content information 2 (steps S208 and S209).

  The processing procedure from step S201 to step S209 is repeated each time a remaining amount request is received from the server device 10 (step S210). If the end of viewing of the content information 2 is notified from the server device 10, this process ends (step S211).

  According to the present embodiment, the remaining battery level of the internal battery is acquired from each client terminal 20 and the audio master is designated, and the client terminal 20 designated as the audio master performs audio output. Can be used efficiently to allow viewing of video. In particular, since the audio master is designated based on the remaining battery level of each client terminal 20, it is possible to prevent the deterioration of the built-in battery from being accelerated due to the audio output being concentrated on a specific client terminal 20.

  If the remaining battery level of the client terminal 20 designated as the audio master falls below the determination threshold Thk, the remaining battery level is acquired again and the audio master is designated. For this reason, it is possible to prevent the audio output from being stopped in the entire system just because the remaining battery level of the client terminal 20 designated as the audio master has decreased. Therefore, by using the built-in battery in the system efficiently, it is possible to lengthen the time for continuous viewing.

Embodiment 2. FIG.
In the first embodiment, an example in which the server device 10 acquires the remaining battery level from each client terminal 20 and designates the audio master has been described. In contrast, in the present embodiment, a case will be described in which the client terminal 20 acquires the remaining battery level from another terminal device and designates the audio master.

  FIG. 8 is a block diagram showing a configuration example of the client terminal 20 according to the second embodiment of the present invention, and shows an example of a functional configuration in the CPU 25. Compared with the CPU 25 of FIG. 4, the CPU 25 is different in that it includes a battery remaining amount acquisition unit 255 and an audio master designation unit 256 instead of the master release request unit 254.

  The remaining battery level acquisition unit 255 acquires the remaining battery level from one or more other client terminals 20 constituting the multi-screen screen. Specifically, when an instruction to start viewing the content information 2 is given, a remaining amount request for requesting the client terminal 20 to transmit the remaining battery amount is generated and transmitted to the other client terminals 20.

  The audio master designation unit 256 compares the remaining battery level received from the other client terminal 20 with the remaining battery level of the own terminal, and based on the comparison result, either the other client terminal 20 or the own terminal Is designated as the audio master, and is notified to the corresponding client terminal 20.

  In the remaining battery level acquisition unit 255, if the remaining battery level of the terminal falls below the determination threshold value Thk after being designated as the audio master, an operation to acquire the remaining battery level is performed. The audio master designation unit 256 designates the audio master based on the remaining battery remaining amount.

  Even with such a configuration, the video can be viewed using the built-in battery in the system efficiently. In particular, the client terminal 20 designated as the voice master newly designates the voice master based on the remaining battery level acquired from the other client terminals 20 and the remaining battery level of the own terminal. For this reason, since it is suppressed that the structure of the server apparatus 10 becomes complicated, the video display system 1 can be implement | achieved cheaply.

  In the first embodiment, when the remaining battery level of the client terminal 10 designated as the audio master falls below the determination threshold Thk, the server device 10 again acquires the remaining battery level and newly designates the audio master. An example was described. However, the present invention does not limit the trigger for performing the reallocation of the audio output to the comparison result between the remaining battery level and the determination threshold value Thk. For example, the server device 10 may be configured to periodically acquire the battery remaining amount from each client terminal 20 and designate the audio master.

  In the first and second embodiments, the example in which the client terminal 20 downloads the content information 2 from the server device 10 and displays the video has been described. However, the present invention limits the supply method of the content information 2 to this. Not what you want. For example, the present invention can also be applied to a case where the client terminal 20 receives a TV (television) broadcast wave and displays a program video provided by a broadcast station. That is, the content information 2 includes such TV broadcast waves.

1 video display system 2 content information 3 communication network 4 wireless AP (access point)
DESCRIPTION OF SYMBOLS 10 Server apparatus 11 Content memory | storage part 12 Image | video output control part 121 Battery remaining charge acquisition part 122 Audio | voice master designation | designated part 123 Master allocation memory | storage part 124 Master designation | designated counting part 125 Determination threshold value notification part 126 Master cancellation | release notification part 13 Network communication part 20 Client terminal 21 Touch Panel 21a Touch Sensor 21b Display 22 Microphones 23R, 23L Speaker 24 Wireless Communication Unit 25 CPU
251 Video output unit 252 Determination threshold storage unit 253 Battery remaining amount comparison unit 254 Master release request unit 255 Battery remaining amount acquisition unit 256 Audio master designation unit 26 Content storage unit 27 Secondary battery 28 Battery remaining amount detection unit 29 Touch operation detection unit 30 Display control unit 31 Audio processing unit

Claims (6)

Including two or more viewing units each having a built-in battery, a display, and a speaker; and a content providing apparatus that provides content information including video and audio. Each viewing unit receives the content information and is a part of a common video. In the video display system for displaying different images on the display,
A remaining battery level detecting means for detecting a remaining battery level of the built-in battery in the viewing unit;
Battery remaining amount obtaining means for obtaining the remaining battery amount from the two or more viewing units;
Voice master designation means for designating one of the two or more viewing units as a voice master based on the remaining battery level,
The viewing unit specified in the audio master based on the content information, a portion of the video and displays on the display, have rows audio output from the speaker,
The video display system , wherein the viewing unit not designated as the audio master does not perform audio output based on the content information, and displays a part of the video on the display based on the content information . A battery remaining capacity comparing means for comparing the remaining battery capacity with a predetermined determination threshold;
The battery remaining amount acquisition means acquires the battery remaining amount again when the remaining battery level of the viewing unit designated as the audio master falls below the determination threshold,
The video display system according to claim 1, wherein the audio master designating unit designates the audio master based on the battery remaining amount acquired again. Master designated counting means for counting the designated number of times of the audio master,
3. The video display system according to claim 2, wherein the remaining battery level comparing unit compares the remaining battery level using the determination threshold value that differs depending on the designated number of times. After the designation of the voice master based on the remaining battery level acquired again, a master release notification means for notifying the original voice master of master release,
The video display system according to claim 2 or 3, wherein the viewing unit designated as the audio master stops audio output based on the content information based on the notification of master release. In a terminal device that is provided with a built-in battery, a display, and a speaker, receives content information including video and audio from a content providing device, and displays a part of the common video.
Battery remaining amount detecting means for detecting the remaining amount of the built-in battery;
Content receiving means for receiving the content information from the content providing device;
Video output means for displaying a part of the video on the display based on the received content information;
Battery remaining capacity comparing means for comparing the remaining battery capacity with a predetermined determination threshold;
After specified in voice master, when the battery remaining amount falls below the determination threshold value, and a master release request means for making a request for master release to the content providing device,
The content providing device obtains two or more of the remaining battery capacity from the terminal device, based on the obtained the battery level, one of the two or more terminal devices specified above audio master,
Said image output unit, when specified in the audio master by the content providing apparatus, based on the content information, a portion of the video and displays on the display, performs voice output from the speaker, the content If not specified in the voice master by providing apparatus, without a sound output based on the content information, a portion of the video displayed on the display based on the content information,
Further, the video output means stops the audio output based on the content information after the master release request. In a terminal device that is provided with a built-in battery, a display, and a speaker, receives content information including video and audio from a content providing device, and displays a part of the common video.
Battery remaining amount detecting means for detecting the remaining amount of the built-in battery;
Content receiving means for receiving the content information from the content providing device;
Video output means for displaying a part of the video on the display based on the received content information;
Battery remaining amount obtaining means for obtaining the remaining battery amount from another terminal device;
Based on the remaining battery level acquired from the other terminal device and the remaining battery level of the terminal itself, comprising voice master designation means for designating either the other terminal device or the own terminal as a voice master,
Said image output unit, when specified in the sound master, based on the content information, a portion of the video and displays on the display, have rows audio output from the speaker, as specified in the audio master If not, a terminal device displays a part of the video on the display based on the content information without performing audio output based on the content information .