JP2015104101A - Video receiving apparatus, video transmitting apparatus, and video reproduction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video receiving apparatus etc. which improves convenience in reproducing a video by transmitting the video from a transmission side to a reception side.SOLUTION: The video receiving apparatus comprises: a video receiver which receives a video signal from an external apparatus; and a command transmitter which transmits a command to prevent the external apparatus from shifting to a mode of stopping the transmission of the video signal, on the basis of the connecting state of the communication between the external apparatus and the video receiver.

Description

  The present invention relates to a video transmission / reception system.

  2. Description of the Related Art Conventionally, a technique is known in which devices are connected by wireless connection and video can be transmitted between the devices. For example, there is a communication standard called Miracast (registered trademark) that can transmit video via a Wi-Fi network.

  If Miracast is used, for example, a video is transmitted from a smartphone or PC (personal computer) to a TV device via a Wi-Fi network, and the same video as that displayed on the smartphone or PC on the transmission side is received on the TV on the reception side. Can be displayed on the device. That is, mirroring display is possible.

JP 2002-318644 A JP 2010-176307 A JP 2010-287017 A

  However, while video is being transmitted from the smartphone or PC to the television device, the smartphone or PC is not operated for a certain period of time, so that the mode is shifted to the power saving mode, and the video display is interrupted on the television device. There was a thing. In particular, during playback of a moving image, there is a high possibility that a user watching the moving image does not perform an operation, and there is a high possibility that a smartphone or PC shifts to a power saving mode.

  In this case, an operation such as canceling the power saving mode of the device is necessary, and the usability is poor. Further, since the video display is interrupted while the user is watching the video, there is a problem that it is troublesome for the user.

  In addition, although the invention regarding the apparatus which transfers to power saving mode is disclosed by patent documents 1-3, for example, none solves the said problem.

  In view of the above situation, an object of the present invention is to provide a video reception device, a video transmission device, and a video playback method that improve convenience when video is transmitted from the transmission side to the reception side. And

  In order to achieve the above object, a video receiving apparatus according to an aspect of the present invention prevents a video receiving unit that receives a video signal from an external device and the external device from entering a mode in which transmission of the video signal is stopped. A command transmission unit that transmits a command to be performed based on a communication connection state between the external device and the video reception unit.

  According to such a configuration, it is possible to prevent the video reproduction by the video transmission from the external device to the video receiving device from being stopped by switching to the mode in which the external device stops the transmission of the video signal. Convenience for users who are

  In the above configuration, the external device may transition to the mode in which the transmission of the video signal of a moving image is stopped when no operation is performed for a certain period of time.

  According to such a configuration, the user often does not operate the external device while watching the moving image, but even in such a case, the transition to the mode in which transmission of the video signal of the moving image is stopped is prevented. Therefore, it is possible to prevent the video playback from being interrupted. Therefore, it is convenient for the user.

  In any of the above configurations, the display control unit further displays a confirmation screen on the display unit for confirming whether or not to invalidate the transition to the mode based on the video signal received by the video receiving unit. The command transmission unit may transmit the command corresponding to the selection determination operation on the confirmation screen.

  According to such a configuration, if the user performs a selection determination operation for invalidating the transition to the mode on the confirmation screen displayed on the display unit, the transition to the mode is invalidated on the external device.

  In any one of the configurations described above, the command transmission unit may transmit the command at a time interval shorter than a time until the external device shifts to the mode.

  According to such a configuration, since the command is transmitted once and the command is transmitted again before the time until the external device shifts to the mode, it can be maintained so as not to shift to the mode.

  In the above configuration, the information processing apparatus may further include an acquisition unit that acquires information about a time until the external device shifts to the mode from the external device, and the command transmission unit is configured based on the acquired time information. The command may be transmitted at time intervals.

  According to such a configuration, the command can be transmitted with an appropriate frequency according to the external device.

  In order to achieve the above object, a video transmission device according to an aspect of the present invention includes a video transmission unit that transmits a video signal to an external device, and a setting that shifts to a mode that stops transmission of the video signal. The video transmission unit and a setting change unit that changes from valid to invalid based on the communication connection state of the external device.

  According to such a configuration, the video transmission device can be prevented from stopping video reproduction by video transmission from the video transmission device to the external device by shifting to a mode in which transmission of the video signal is stopped. Convenience is improved for the viewing user.

  The above configuration further includes a display control unit that displays on the display unit a confirmation screen for confirming whether or not to invalidate the transition to the mode, and the setting change unit performs the selection determination operation on the confirmation screen. The setting may be changed accordingly.

  According to such a configuration, when the user performs a selection determination operation for invalidating the transition to the mode on the confirmation screen displayed on the display unit, the transition to the mode is disabled and changed.

  In any of the above-described configurations, if the setting for shifting to the mode is valid, the mode is shifted to the mode in which transmission of the video signal of a moving image is stopped unless an operation is performed for a certain period of time.

  According to such a configuration, the user often does not operate the video transmission device when watching a moving image, but even in such a case, the user is prevented from shifting to a mode in which transmission of the video signal of the moving image is stopped. Therefore, it is possible to prevent the video playback from being interrupted. Therefore, it is convenient for the user.

  In order to achieve the above object, a video reproduction method according to an aspect of the present invention includes a step of transmitting a video signal from a video transmission device to a video reception device, and the video reception device communicates with the video transmission device itself. A step of determining a connection state and a command for preventing the video transmission apparatus from shifting to a mode for stopping transmission of a video signal from the video reception apparatus to the video transmission apparatus based on the determination result of the communication connection state And a step of transmitting.

  In order to achieve the above object, a video reproduction method according to an aspect of the present invention includes a step of transmitting a video signal from a video transmission device to a video reception device, and communication between the video transmission device and the video reception device. A step of determining a connection state, and a step of changing the setting for shifting to a mode in which the video signal transmission is stopped from the valid to invalid based on the determination result of the communication connection state. It is said.

  According to the present invention, it is possible to improve convenience in reproducing a video by transmitting the video from the transmission side to the reception side.

1 is a schematic external view of a video transmission / reception system according to an embodiment of the present invention. It is a block block diagram of the smart phone which concerns on one Embodiment of this invention. It is a block block diagram of the television apparatus which concerns on one Embodiment of this invention. It is a flowchart of 1st Embodiment which concerns on power saving mode transition prevention control at the time of animation reproduction | regeneration. It is a figure which shows an example of the confirmation screen in 1st Embodiment. It is a flowchart of 3rd Embodiment which concerns on power saving mode transition prevention control at the time of animation reproduction | regeneration. It is a flowchart of 4th Embodiment which concerns on power saving mode transition prevention control at the time of animation reproduction | regeneration. It is a flowchart of 5th Embodiment which concerns on power saving mode transition prevention control at the time of animation reproduction | regeneration.

  An embodiment of the present invention will be described below with reference to the drawings. Here, a system composed of a smartphone and a television set compatible with Miracast will be described as an example.

  FIG. 1 shows a schematic appearance of a system including a smartphone (video transmission device) and a television device (video reception device) according to an embodiment of the present invention. A smartphone 10 shown in FIG. 1 has a flat casing in appearance, and includes a display input unit in which a touch panel 103 and a liquid crystal panel 104 are integrated on the front side of the casing.

  The smartphone 10 is wirelessly connected to the television device 20 on a one-to-one basis by Miracast, and can transmit video to the television device 20. Thereby, the image | video of the same content as the image | video displayed on the smart phone 10 can be displayed on the display part 206 of the television apparatus 20, and the mirroring display is implement | achieved.

  A block configuration of the smartphone 10 is shown in FIG. As shown in FIG. 2, the smartphone 10 includes an antenna 101, a first wireless communication unit 102, a touch panel 103, a liquid crystal panel 104, a backlight 105, a camera unit 106, an operation unit 107, a storage unit 108, a speaker 109, a microphone 110, A second wireless communication unit 111, a power supply unit 112, and a control unit 113 are provided.

  The first wireless communication unit 102 performs wireless communication with a base station in the mobile communication network. Using this wireless communication, audio data, video data, e-mail data, etc. are transmitted and received, and Web data, streaming data, etc. are received.

  The liquid crystal panel 104 is driven by the control unit 114, and the light transmittance is adjusted by driving the liquid crystal corresponding to each pixel in accordance with the image to be displayed. The backlight 105 illuminates the liquid crystal panel 104 from behind. For example, an edge type using LEDs and a light guide plate is employed.

  The touch panel 103 is configured to be able to visually recognize an image displayed on the display screen of the liquid crystal panel 104 and is placed on the liquid crystal panel 104 to detect a touch of an operation object such as a user's finger. Based on the detection signal output from the touch panel 103, the control unit 113 detects the operation position on the touch panel 103.

  The camera unit 106 performs electronic imaging using an imaging device such as a CMOS. The captured image can be compressed in, for example, the JPEG format, and the compressed data can be stored in the storage unit 108.

  The operation unit 107 is a hardware key that receives an input from the user, and is provided below the display input unit (103, 104), for example, as shown in FIG.

  The storage unit 108 includes a control program and control data for the control unit 113, address data that associates the name and telephone number of the communication partner, transmitted / received e-mail data, Web data downloaded through Web browsing, and downloaded content Data is stored, and streaming data and the like are temporarily stored. Note that the storage unit 108 includes, for example, a flash memory, a RAM, a ROM, and the like.

  The microphone 110 captures voice uttered by the user, and the captured voice is subjected to predetermined processing by the control unit 113 and transmitted to the base station by the first wireless communication unit 102. The sound received by the first wireless communication unit 102 is subjected to predetermined processing by the control unit 113 and is output from the speaker 109. Thereby, the user can make a call. Note that the speaker 109 is not limited to the voice of a call, and can output various voices such as voice based on streaming data received by the first wireless communication unit 102, for example.

  The second wireless communication unit 111 performs wireless communication according to Miracast, and details will be described later.

  The power supply unit 112 is a circuit that supplies power stored in a battery (not shown) to each unit of the smartphone 10.

  The control unit 113 includes a microprocessor, operates according to a control program and control data stored in the storage unit 108, and performs overall control of each unit of the smartphone 10.

  Next, a block configuration of the television apparatus 20 is shown in FIG. As shown in FIG. 3, the television apparatus 20 includes a tuner 202, a demodulation unit 203, a separation unit 204, a decoder 205, a display unit 206, a control unit 207, a remote control light receiving unit 208, and a wireless communication unit 209. An antenna 201 is connected to the tuner 202.

  The tuner 202 corresponds to, for example, at least one of terrestrial digital broadcast, BS digital broadcast, and CS digital broadcast, and selects a broadcast signal of a desired channel from a high-frequency broadcast signal input from the antenna 201.

  The demodulator 203 performs processing such as digital demodulation and error correction on the broadcast signal of the channel selected by the tuner 202, generates a transport stream, and outputs the transport stream to the separator 204.

  The separation unit (demultiplexer) 204 separates the transport stream input from the demodulation unit 203 into a video stream, an audio stream, SI (Service Information), caption data, and the like. The video output of the separation unit 204 is input to the decoder 205. Note that illustration of the configuration for processing other outputs from the separation unit 204 is omitted.

  The decoder 205 decodes the video stream input from the separation unit 204 and outputs the generated video data to the display unit 206. The display unit 206 is configured by a liquid crystal display, for example, and displays a video based on the video data input from the decoder 205. As a result, the broadcast video is displayed on the display unit 206.

  The control unit 207 is a control device that comprehensively controls the television device 20. The remote control light receiving unit 208 receives an operation signal such as an infrared signal corresponding to an operation from the remote control device 30, converts the received operation signal into a remote control code, and transmits the remote control code to the control unit 207. The control unit 207 performs a control operation according to the transmitted remote control code. Thereby, the user can operate the television device 20 by the remote control device 30.

  Here, as described above, this system supports video transmission by Miracast, and this will be described. First, when a predetermined operation is performed on the touch panel 103 of the smartphone 10 by the user, the control unit 113 searches for devices that can be connected via the second wireless communication unit 111. Here, in the television apparatus 20, the control unit 207 responds to the inquiry from the smartphone 10 to the control unit 113 via the wireless communication unit 209 and the second wireless communication unit 111. Then, the searched device is displayed on the liquid crystal panel 104 by the control unit 113. Since the television apparatus 20 is included in this display, when the user selects the television apparatus 20 using the touch panel 103, the control unit 113 establishes a connection with the control unit 207 via the second wireless communication unit 111 and the wireless communication unit 209. .

  When the connection is established, the control unit 113 encodes the video data of the video to be displayed on the liquid crystal panel 104, and transmits the encoded video data to the television apparatus 20 via the second wireless communication unit 111. In the television apparatus 20, the control unit 207 receives the video data transmitted via the wireless communication unit 209, and the control unit 207 decodes the received video data, and displays it on the display unit 206 based on the decoded video data. Display video.

  As a result, the same video is displayed on the liquid crystal panel 104 of the smartphone 10 and the display unit 206 of the television device 20, thereby realizing mirroring display. For example, an OS screen (home screen or the like) displayed on the smartphone 10 or a moving image by streaming or the like is displayed on the television device 20 as it is. Therefore, the user can view the image displayed in a mirroring manner on the display unit 206 having a larger screen than the liquid crystal panel 104.

<First Embodiment According to Power Saving Mode Transition Prevention Control During Video Playback>
The power saving mode setting control at the time of moving image reproduction in the system including the smartphone 10 and the television device 20 having the above-described configuration will be described with reference to the flowchart shown in FIG.

  For example, when a moving image reproduction start operation is performed on the touch panel 103 of the smartphone 10, the flowchart illustrated in FIG. 4 is started. For example, video playback can be performed by streaming such as youtube (registered trademark).

  First, in step S1, the control unit 113 determines whether or not the transition of the smartphone 10 to the power saving mode is set to be effective. For example, when valid / invalid is set by the touch panel 103 on the setting screen displayed on the liquid crystal panel 104, the setting information is stored in the storage unit 108, so the control unit 113 may check the setting information.

  Regarding the transition to the power saving mode, for example, when no operation is performed on the touch panel 103 and the operation unit 107 for a certain period of time, the control unit 113 darkly drives the liquid crystal panel 104 (black screen display drive), and turns off the backlight 105. Let At this time, if the control unit 113 is transmitting video to the television apparatus 20 via the second wireless communication unit 111 by Miracast, the control unit 113 stops transmission of the video. When the transmission of the video is stopped, for example, on the television device 20 side, the control unit 207 darkly drives the display unit 206, and the display unit 206 changes the display from the mirrored video to the black screen.

  If the transition to the power saving mode is set to be valid (Y in Step S1), the process proceeds to Step 2, and the control unit 113 determines whether or not the connection by Miracast is established. If the connection by Miracast is established (Y in Step 2), the process proceeds to Step S3, and the control unit 113 displays a screen for confirming to the user whether or not to invalidate the transition to the power saving mode. It is displayed on the panel 104. Here, for example, a screen including an item for selecting whether to invalidate as shown in FIG. 5 is displayed.

  If it is selected on the confirmation screen that the transition to the power saving mode is disabled (Y in step S4), the process proceeds to step S5, and the control unit 113 temporarily shifts the transition to the power saving mode from enabled to disabled. Change the setting automatically.

  Then, the control unit 113 starts moving image reproduction on the liquid crystal panel 104 and starts transmitting moving image video to the television apparatus 20 via the second wireless communication unit 111 by Miracast. As a result, the moving image having the same content as the moving image displayed on the liquid crystal panel 104 is mirror-displayed on the display unit 206 of the television apparatus 20. Since the transition to the power saving mode is temporarily set to be invalid in step S5, video transmission is not stopped even if the touch panel 103 and the operation unit 107 are not operated for a certain period of time. Note that when the moving image reproduction is finished, the control unit 113 resets the transition to the power saving mode from invalid to valid.

  Accordingly, it is possible to eliminate the user's troublesomeness due to the stop of the moving image reproduction during the moving image reproduction on the television device 20. Since the user often does not operate the smartphone 10 during video playback, convenience is improved. In addition, when starting to play a moving image, a confirmation screen is automatically displayed, and the transition to the power saving mode can be set to be invalid, so that the user does not need to make a setting from the setting screen or the like in advance.

  If the transition to the power saving mode is set to be invalid in step S1 (N in step S1), the moving image reproduction is started as it is. In this case, the video playback will not be interrupted regardless of whether or not the Miracast connection is established.

  In addition, when the connection by Miracast is not established in Step 2 (N in Step S2), the moving image reproduction is started as it is. In this case, when no operation is performed on the smartphone 10, since the mode is shifted to the power saving mode, the video reproduction on the smartphone 10 is interrupted.

  Also, when it is selected not to invalidate the transition to the power saving mode on the confirmation screen in step S4 (N in step S4), the moving image reproduction is started as it is. In this case, when no operation is performed on the smartphone 10, since the mode is shifted to the power saving mode, the video playback on the TV device 20 side connected by Miracast is interrupted.

<Second Embodiment According to Power Saving Mode Transition Prevention Control During Video Playback>
Next, a second embodiment as a modification of the first embodiment will be described. In the present embodiment, the flowchart on the smartphone 10 side is the same as that in FIG. 4 described above. When a moving image reproduction start operation is performed on the smartphone 10, the flowchart of FIG. 4 is started.

  When the transition to the power saving mode is set to be effective (Y in Step S1) and the connection by Miracast is established (Y in Step S2), the liquid crystal panel 104 of the smartphone 10 is switched to the power saving mode in Step S3. A screen for confirming whether or not to invalidate the migration is displayed. Here, since it is connected by Miracast, the control unit 113 transmits the video of the confirmation screen to the television device 20 via the second wireless communication unit 111, and the confirmation screen is displayed in a mirrored manner on the display unit 206 of the television device 20. The

  Here, when the connection by Miracast is established, in the television device 20, the control unit 207 can transmit a command corresponding to an operation on the remote control device 30 to the smartphone 10 via the wireless communication unit 209. It becomes. Accordingly, when the user operates, for example, a cursor key on the remote control device 30 with the confirmation screen displayed on the display unit 206, a command corresponding to the operation is transmitted to the smartphone 10, and the selection item on the confirmation screen can be selected. .

  When it is selected that the transition to the power saving mode is disabled on the confirmation screen, for example, a determination key is operated on the remote control device 30, and a command corresponding to the operation is transmitted to the smartphone 10 (Y in step S4), control is performed. The unit 113 temporarily changes the setting to disable the shift to the power saving mode in step S5. Then, moving image playback is started.

  On the other hand, when it is selected not to invalidate the transition to the power saving mode on the confirmation screen, and the determination operation is performed on the remote control device 30 (N in step S4), the moving image reproduction is started as it is.

  As described above, according to the present embodiment, the user can set whether or not to invalidate the transition to the power saving mode by the remote control device 30 while viewing the confirmation screen displayed on the television device 20.

<Third embodiment according to power saving mode transition prevention control during video playback>
Next, a third embodiment as another modified example of the first embodiment will be described. A flowchart on the smartphone 10 side in the present embodiment is shown in FIG. When a moving image reproduction start operation is performed on the smartphone 10, the flowchart of FIG. 6 is started.

  First, in step S11, the control unit 113 determines whether or not the transition to the power saving mode of the smartphone 10 is set to be effective. If it is set to be valid (Y in step S11), the process proceeds to step 12, and the control unit 113 determines whether or not a connection by Miracast is established.

  If the connection has been established (Y in step S12), the process proceeds to step S13, and the control unit 113 temporarily changes the setting of the transition to the power saving mode from valid to invalid. Then, moving image playback is started.

  That is, in the present embodiment, the transition to the power saving mode is automatically changed from valid to invalid temporarily without displaying the confirmation screen as in the first embodiment. Thereby, it can prevent that the smart phone 10 transfers to a power saving mode at the time of animation reproduction | regeneration, without a user performing special operation.

<Fourth Embodiment Related to Power Saving Mode Transition Prevention Control During Video Playback>
Next, power saving mode transition prevention control during video playback mainly using the television device 20 will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 7 shows processing on the television device 20 side.

  When a moving image reproduction start operation is performed on the smartphone 10 connected to the TV apparatus 20 by Miracast, the flowchart of FIG. 7 is started (at this time, moving image mirroring display is started).

  In step S21, the control unit 207 of the television apparatus 20 determines whether or not a connection by Miracast is established. If the connection is established (Y in step S21), the process proceeds to step S22, and the control unit 207 transmits the command to the smartphone 10 via the wireless communication unit 209 at regular time intervals.

  Here, the predetermined time is set to a predetermined time that is shorter than the predetermined time until shifting to the power saving mode when the smartphone 10 is not operated. In addition, what is necessary is just to set the said fixed time shorter than the minimum time among different fixed time, when the fixed time until it transfers to the power saving mode of the smart phone 10 changes with kinds of the smart phone 10. FIG.

  Further, the command to be transmitted to the smartphone 10 may be a command corresponding to a key that does not affect reproduction such as a cursor key in the remote control device 30, for example.

  Thereby, once a command is transmitted to the smartphone 10, the control unit 113 of the smartphone 10 determines that an operation has been performed. And since it transmits a command to the smart phone 10 again before the fixed time passes until it transfers to a power saving mode when operation is not performed in the smart phone 10, the control part 113 of the smart phone 10 is considered that operation was made, and the power saving mode The transition to is not performed. Therefore, even when the user does not perform an operation on the smartphone 10, it is possible to prevent the reproduction of the moving image due to the mirroring display on the television device 20 from being interrupted.

  After step S22, the process returns to step S21, and the command transmission is continued while the Miracast connection is established. When the Miracast connection is released (N in step S21), the flowchart of FIG. 7 ends.

<Fifth Embodiment Related to Power Saving Mode Transition Prevention Control During Video Playback>
Next, a fifth embodiment as a modified example of the fourth embodiment will be described. FIG. 8 is a flowchart showing processing on the television device 20 side in the present embodiment.

  When the moving image reproduction start operation is performed on the smartphone 10 connected to the TV apparatus 20 by Miracast, the flowchart of FIG. 8 is started (at this time, the moving image mirroring display is started).

  First, in step S <b> 31, the control unit 207 of the television apparatus 20 acquires information on a certain time (hereinafter referred to as a transition time) until the transition to the power saving mode when no operation is performed from the smartphone 10 via the wireless communication unit 209. To do.

  Next, in step S32, the control unit 207 determines whether or not a connection by Miracast has been established. If the connection is established (Y in step S32), the process proceeds to step S33, and the control unit 207 sends a command to the smartphone 10 via the wireless communication unit 209 at a time interval shorter than the transition time acquired in step S31. To transmit.

  Also in this embodiment, the smartphone 10 can be prevented from shifting to the power saving mode due to command transmission during moving image reproduction in mirroring display. In particular, since the command is transmitted at a time interval based on the transition time acquired from the smartphone 10, the command can be transmitted with an appropriate frequency according to the smartphone 10.

  The embodiment of the present invention has been described above, but the embodiment can be variously modified within the scope of the gist of the present invention.

  For example, the video transmission device is not limited to a smartphone but may be a PC (personal computer) or the like. Further, the video receiving device is not limited to the television device, and may be an HDD recorder or a Blu-ray disc recorder with a display connected to the outside.

DESCRIPTION OF SYMBOLS 10 Smartphone 101 Antenna 102 1st wireless communication part 103 Touch panel 104 Liquid crystal panel 105 Backlight 106 Camera part 107 Operation part 108 Storage part 109 Speaker 110 Microphone 111 2nd wireless communication part 112 Power supply part 113 Control part 20 Television apparatus 201 Antenna 202 Tuner DESCRIPTION OF SYMBOLS 203 Demodulation part 204 Separation part 205 Decoder 206 Display part 207 Control part 208 Remote control light reception part 209 Wireless communication part 30

Claims (10)

A video receiver for receiving a video signal from an external device;
A command transmission unit that transmits a command for preventing the external device from shifting to a mode of stopping transmission of a video signal based on a communication connection state between the external device and the video reception unit;
A video receiving apparatus comprising:   The video receiving apparatus according to claim 1, wherein the external device shifts to the mode in which transmission of the video signal of a moving image is stopped when an operation is not performed for a certain period of time. A display control unit for displaying on the display unit a confirmation screen for confirming whether to invalidate the transition to the mode based on the video signal received by the video receiving unit;
The video reception device according to claim 1, wherein the command transmission unit transmits the command corresponding to a selection determination operation on the confirmation screen.   The video reception device according to claim 1, wherein the command transmission unit transmits the command at a time interval shorter than a time until the external device shifts to the mode. Further comprising an acquisition unit for acquiring information on time until the external device shifts to the mode from the external device;
The video reception device according to claim 4, wherein the command transmission unit transmits the command at the time interval based on the acquired time information. A video transmission unit that transmits a video signal to an external device;
A setting changing unit for changing the setting to shift to a mode for stopping transmission of a video signal from valid to invalid based on a communication connection state between the video transmitting unit and the external device;
A video transmission device comprising: A display control unit for displaying a confirmation screen for confirming whether or not to invalidate the transition to the mode on the display unit;
The video transmission device according to claim 6, wherein the setting change unit changes the setting according to a selection determination operation on the confirmation screen.   8. The video according to claim 6, wherein if the setting for shifting to the mode is valid, the mode shifts to the mode in which the transmission of the video signal of the moving image is stopped if the operation is not performed for a certain period of time. Transmitter device. Transmitting a video signal from the video transmitting device to the video receiving device;
The video receiving device determining its own communication connection state with the video transmitting device;
Transmitting a command from the video receiver to the video transmitter based on the determination result of the communication connection state, the command preventing the video transmitter from shifting to a mode for stopping transmission of a video signal;
A video playback method comprising: Transmitting a video signal from the video transmitting device to the video receiving device;
The video transmitting device determining a communication connection state between itself and the video receiving device;
Changing the setting of transition to a mode in which the video signal transmission is stopped from valid to invalid based on the determination result of the communication connection state by the video transmission device;
A video playback method comprising:

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