JP6993793B2 - Electronics, control methods and programs - Google Patents

Description

The present invention relates to an electronic device capable of delivering moving image data while encoding (encoding) and a control method thereof.

In recent years, moving image data has been distributed in real time via an IP (Internet protocol) network. Generally, since the data size of moving image data is large, when transferring moving image data via an IP network, the moving image data is encoded (encoded) according to a standard such as MPEG-4 and transmitted. When distributing video data to a plurality of display devices, the video data is encoded according to a standard that can be displayed by each display device.

Encoding video data requires advanced operations such as spatial conversion and inter-frame prediction. Further, in the case of streaming distribution in which the video is distributed while encoding the video data, there is a time constraint that the encoding must be performed earlier than the playback time. Therefore, in an electronic device that distributes a moving image, encoding is performed using dedicated hardware or a processor such as a DSP (digital signal processor) capable of performing digital calculation at high speed. The hardware (or a combination of hardware and software) that performs such encoding is called an encoder.

By the way, even in an electronic device having the above-mentioned configuration, there is an upper limit to the number or combination of moving image data that can be encoded at the same time. When encoding is performed with a number or combination exceeding the upper limit, there arises a problem that the moving image display on the display device is disturbed without observing the above-mentioned time constraint. Patent Document 1 describes a method of reducing the load of the encoding process by lowering the coding quality when it is determined that the load of the encoding process is high in the configuration in which a plurality of encodings can be performed at the same time.

Japanese Unexamined Patent Publication No. 2004-166132

However, in Patent Document 1, when the load of the encoding process is high, there is a problem that the coding quality is deteriorated in all of the plurality of encoding processes performed at the same time.

Therefore, an object of the present invention is to enable transmission of moving image data suitable for the capabilities of each external device when distributing moving image data to a plurality of external devices while encoding (encoding) them.

The electronic device according to the present invention includes a determination means for determining whether or not one or more formats for allowing all of a plurality of external devices to display selected moving image data can be determined, and the one or more . If the format of the above can be determined, the encoding means for encoding the selected moving image data to generate the moving image data in the one or more formats, and if the one or more formats can be determined, the generation is generated. The communication means for transmitting the moving image data in the one or more formats to each of the plurality of external devices, and the plurality of selected moving image data when the one or more formats cannot be determined. It has a display control means for causing the display means to display information indicating that it cannot be provided to any of the external devices.

The control method according to the present invention is a control method for an electronic device, and determines whether or not one or more formats for allowing all of a plurality of external devices to display selected moving image data can be determined. The determination step to be performed, and if the one or more formats can be determined, the encoding step of encoding the selected moving image data to generate the moving image data in the one or more formats, and the one or more formats. If it can be determined, the communication step of transmitting the generated moving image data in one or more formats to each of the plurality of external devices, and if the one or more formats cannot be determined, the above. It has a display control step for displaying information indicating that the selected moving image data cannot be provided to any of the plurality of external devices to the display means.

The program according to the present invention comprises a determination means for determining whether or not the computer can determine one or more formats for allowing the selected moving image data to be displayed by all of the plurality of external devices, and the above- mentioned 1 . If one or more formats can be determined, the encoding means that encodes the selected moving image data to generate the moving image data in the one or more formats, and if the one or more formats can be determined , the encoding means. When the communication means for transmitting the generated moving image data in one or more formats to each of the plurality of external devices and the one or more formats cannot be determined, the selected moving image data is used. It functions as a display control means for displaying information indicating that it cannot be provided to any of a plurality of external devices to the display means.

According to the present invention, when distributing moving image data to a plurality of external devices while encoding (encoding), it is possible to transmit moving image data suitable for the capabilities of each external device.

It is a block diagram for demonstrating the component | component of the electronic device 100 in Embodiment 1. FIG. It is a block diagram for demonstrating the component which the electronic device 100 further has. It is a figure for demonstrating the appearance example of the electronic device 100. It is a figure for demonstrating the configuration example of the wireless network including the electronic device 100 and the receivers 301-303, and an example of the display capacity (reproduction capacity) of the receivers 301-303. It is a figure for demonstrating an example of an encoding ability. It is a flowchart for demonstrating the operation example of the electronic device 100 which is a reproduction mode. It is a flowchart for demonstrating the determination process of a moving image data format. It is a figure for demonstrating the operation example of the display part 105 of the electronic device 100. It is a figure for demonstrating the operation example of the display part 105 of the electronic device 100.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments.

<Embodiment 1>
Hereinafter, the electronic device 100 that can operate as a moving image processing device will be described. In the first embodiment, an example in which the electronic device 100 operates as a digital camera having a wireless LAN function will be described.

FIG. 1A is a block diagram for explaining the components of the electronic device 100. As shown in FIG. 1A, the electronic device 100 includes a CPU (central processing unit) 101, a memory 102, a non-volatile memory 103, an operation unit 104, a display unit 105, a storage medium I / F 106, an image pickup unit 108, and an image processing unit 109. , The battery 110 and the wireless LAN unit 111. These components are connected to the system bus 112.

The CPU 101 controls each component of the electronic device 100 (including the components shown in FIGS. 1A and 1B). The CPU 101 controls each component of the electronic device 100, and realizes recording of moving image data according to user settings and user operations. The memory 102 is a memory that can be rewritten at any time, and is used as a work area by a program that controls the electronic device 100.

The non-volatile memory 103 stores data used by the program, such as a program for controlling the electronic device 100, moving image data, audio data, and other data. In addition, user setting information of the electronic device 100 is also stored in the non-volatile memory 103. When the power is turned on to the electronic device 100, the CPU 101 starts controlling the electronic device 100 by reading and executing a program from the non-volatile memory 103. The non-volatile memory 103 has, for example, a flash memory or an EEPROM.

The operation unit 104 is used to convey a user's instruction to the electronic device 100. The operation unit 104 has a plurality of buttons, dials, and the like. The display unit 105 displays a GUI (graphic user interface) for operating the electronic device 100 based on the control of the CPU 101. The display unit 105 includes, for example, a liquid crystal display (LCD) and an LCD driver unit for controlling the liquid crystal display device (LCD). The CPU 101 controls each component of the electronic device 100 so as to generate display data (warning information and the like) and output it to the display unit 105 according to a program. The display unit 105 displays the output display data.

The storage medium I / F 106 is an interface for connecting a storage medium 107 such as a memory card. Based on the control of the CPU 101, the storage medium I / F 106 reads data from the storage medium 107 connected to the storage medium I / F 106 and writes data to the storage medium 107. The storage medium 107 has a rewritable non-volatile memory for storing captured moving image data. The storage medium 107 operates, for example, as an SD memory card or a CompactFlash® card.

The image pickup unit 108 converts the subject image into moving image data based on the control of the CPU 101, and outputs the moving image data to the internal bus 113. The image pickup unit 108 includes, for example, a lens unit, an optical system that controls aperture, zoom, and focus, an image pickup element for converting a subject image guided by the lens unit into a moving image signal, and a moving image generated by the image pickup element. It has an A / D conversion unit that converts a signal into moving image data. As the image pickup device of the image pickup unit 108, a CMOS image pickup device (CMOS image sensor) using CMOS or a CCD image pickup device (CCD image sensor) using a CCD is generally used.

Based on the control of the CPU 101, the image processing unit 109 performs various image processing on the moving image data stored in the non-volatile memory 103 and / or the storage medium 107 and the moving image data output by the imaging unit 108. The image processing performed by the image processing unit 109 includes video data encoding processing, tongue code processing, compression processing, decoding processing, enlargement / reduction processing (resizing), noise reduction processing, color conversion processing, face detection processing, and the like. Is done. The image processing unit 109 may be configured to have a plurality of dedicated hardware blocks. The encoding processing capability of the image processing unit 109 will be described later with reference to FIG.

The battery 110 supplies electric power for operating the electronic device 100. The battery 110 has a rechargeable battery. The wireless LAN unit 111 is a communication unit for realizing wireless communication. The wireless LAN unit 111 has an antenna for wireless communication and a communication controller for processing wireless signals, and realizes wireless communication according to IEEE802.11a, b, g, and n. Further, in the first embodiment, the wireless LAN unit 111 has a wireless LAN access point function and can directly communicate with other wireless LAN devices. Each of the above components is connected to the system bus 112. Each component connected to the system bus 112 is configured to be able to exchange data with each other via the system bus 112.

Next, with reference to FIG. 1B, the components further possessed by the electronic device 100 will be described. It should be noted that some or all of the components shown in FIG. 1B are realized by dedicated hardware.

The communication unit 151 can communicate with a plurality of external devices by, for example, a network connection using the wireless LAN unit 111. In FIG. 1B, as a plurality of external devices, a plurality of receivers 301, 302, 303 capable of reproducing and displaying moving image data transmitted from the communication unit 151 are connected by communication. The acquisition unit 152 acquires the format of the moving image data that can be displayed by each of the plurality of external devices (receivers) that are communicated and connected via the communication unit 151. In the first embodiment, the format of the moving image data is defined by the resolution and frame rate of FHD, HD, SD and the like. In addition, FHD means Full High Definition, that is, a moving image having a resolution of 1920x1080. HD means High Definition, that is, a moving image having a resolution of 1280x720. SD means Standard Ddefinition, that is, a moving image having a resolution of 640x480.

The selection unit 159 causes the user to select one or more receivers that actually transmit the moving image from the plurality of receivers connected by communication. The determination unit 153 is one of the moving images to be generated by the encoding unit 154 so that all of one or more receivers selected by the user in the selection unit 159 can display the moving image data based on the acquisition result of the acquisition unit 152. Determine the combination of one or more formats. The determination unit 153 determines the combination to be used based on the acquisition result of the acquisition unit 152 from the ability table 157 in which the combination of one or more formats that the encoding unit 154 can generate substantially simultaneously is registered. do. The operation of the determination unit 153 will be described later (see the flowchart of FIG. 6). The encoding unit 154 encodes and transcodes the moving image 158 to be transmitted to generate moving image data in one or more formats so that the moving image data in the combination format determined by the determining unit 153 can be obtained. The encoding unit 154 is realized by the CPU 101 using the image processing unit 109.

The transmission control unit 155 transmits the video data generated by the encoding unit 154 by the combination determined by the determination unit 153 from the communication unit 151 so that each of the one or more receivers receives the video data in a displayable format. Control to send. The detection unit 156 detects an increase or decrease in the number of receivers that have established a communication connection with the communication unit 151. When the detection unit 156 detects that the communication between the communication unit 151 and the receiver becomes impossible and the number of receivers for which the communication connection is established has decreased, the determination unit 153 should generate a moving image for the remaining receivers. Redetermine a combination of one or more forms of. Further, when the detection unit 156 detects that the number of receivers for which communication connections have been established has increased, the determination unit 153 adds the newly detected receivers to combine one or more types. Re-determine.

Next, it is a figure explaining the appearance example of the electronic device 100 with reference to FIG. 2 (a), FIG. 2 (b) and FIG. 2 (c). 2A is a front view of the electronic device 100, FIG. 2B is a rear view of the electronic device 100, and FIG. 2C is a bottom view of the electronic device 100.

The shutter button 201 is included in the operation unit 104. The shutter button 201 is a two-step push switch that can distinguish between a half-pressed state and a fully-pressed state. When the shutter button 201 is half-pressed, the autofocus control is started, and when the shutter button 201 is fully pressed, the imaging operation for capturing still image data or moving image data is started. Further, when the shutter button 201 is fully pressed during the imaging of the moving image data, the imaging of the moving image data is completed.

The lens unit 204 guides the subject image to the image pickup element of the image pickup unit 108. The optical finder 202 is a window for capturing a subject image. The user can confirm the subject image captured from the optical viewfinder 202 from the viewfinder eyepiece 205. The strobe 203 emits light as needed at the time of imaging, and enables imaging of a beautiful still image even under dark conditions.

The power button 206 is a switch for turning on / off the power of the electronic device 100. The button group 207 is included in the operation unit 104. The user uses these buttons to display the menu of the electronic device 100 and set various parameters. The LCD 208 is included in the display unit 105, and is used for displaying an imaging range (composition) before the start of imaging, displaying an operation menu, reproducing captured moving image data, and the like. The screw holes 209 are used to secure the tripod. The battery chamber 210 houses the battery 110 and the storage medium 107. The user can attach / detach the battery 110 and the storage medium 107 to / from the battery chamber 210.

Next, with reference to FIGS. 3A and 3B, a configuration example of a wireless network including the electronic device 100 and the receivers 301 to 303 for receiving the moving image data transmitted by the electronic device 100 will be described. do. In FIG. 3A, the electronic device 100 operates as a wireless LAN access point. The receivers 301 to 303 participate in the wireless LAN network configured by the electronic device 100 as a wireless LAN client.

Further, the electronic device 100 and the receivers 301 to 303 have an IP address as shown in FIG. 3 (b). As a result, each of them can perform data communication with each other by IP data communication.

Next, an example of the display capability (reproduction capability) possessed by each of the receivers 301 to 303 will be described with reference to FIG. 3 (c). Here, FHD, HD, and SD mean the types of moving images having different resolutions as described above. Further, "60p" following @ means that the frame rate is 60 frames per second, and "30p" means that the frame rate is 30 frames per second.

In the first embodiment, an example in which the format of the moving image data is defined by the combination of the type of moving image (FHD, HD, SD) and the frame rate (60p, 30p) will be described. Further, in the first embodiment, the receiver 301 can display moving images of FHD, HD, and SD, the receiver 302 can display moving images of HD and SD, and the receiver 301 can display moving images of SD. The explanation will be given assuming that only can be displayed.

Next, an example of the encoding capability of the image processing unit 109 will be described with reference to FIG. FIG. 4 is a list of combinations of one or more video data formats registered in the capability table 157 that can be generated substantially simultaneously by the image processing unit 109 (encoding unit 154). The image processing unit 109 can generate moving image data by combining SET1 to SET27. For example, if the image processing unit 109 is FHD @ 30p, two streams of moving image data can be generated at the same time (SET2). Further, the image processing unit 109 can generate video data of a total of 3 streams, for example, in the case of a combination of FHD @ 30p and SD @ 60p, 1 stream for FHD @ 30p and 2 streams for SD @ 60p (SET7). ).

In general, the higher the resolution, the higher the quality of the moving image, and in the case of the same resolution, the higher the frame rate, the higher the quality of the moving image. Therefore, the encoding capabilities shown in FIG. 4 are in the order of increasing the resolution, and in the order of increasing the quality of the generated moving image. However, the order in the table is not limited to this order, and for example, the capacity table 157 may be configured so that the order is such that the frame rate becomes higher.

Next, an operation example of the electronic device 100 in the reproduction mode will be described with reference to the flowchart of FIG. Here, the reproduction mode is an operation mode in which the moving image data recorded on the storage medium 107 is displayed on the display unit 105 or an external moving image data receiver. In addition to the reproduction mode, the electronic device 100 has an imaging mode for performing imaging using the imaging unit 108 and a standby mode for suppressing consumption of the battery 110 during standby.

In step S501, the CPU 101 waits until the electronic device 100 transitions to the reproduction mode. For the transition to the reproduction mode, for example, the operation unit 104 is used. Specifically, by pressing the play button 701 of FIG. 7A, the electronic device 100 shifts to the play mode. When the mode shifts to the reproduction mode, the moving image data recorded on the storage medium 107 is displayed on the display unit 105 (display 702 in FIG. 7A).

When the electronic device 100 transitions to the reproduction mode (YES in S501), in step S502, the CPU 101 updates the moving image data displayed on the display unit 105 in response to the operation on the operation unit 104. Specifically, when the user presses the left / right button 703 in FIG. 7A, the moving image data before and after recorded on the storage medium 107 is displayed on the display unit 105.

In step S503, the CPU 101 determines whether or not there is a request to output the moving image data displayed on the display unit 105 to an external receiver (hereinafter referred to as an output request). In the first embodiment, an example of determining that there is a request to output to an external receiver when the user presses the upper button 704 of FIG. 7A will be described. If there is no output request (NO in S503), in step S504, the CPU 101 determines whether or not to end the reproduction mode. Specifically, it is determined that the reproduction mode is terminated when the user presses the shutter button 201 (including half-pressing) or when the power button 206 is pressed. When it is determined to end the reproduction mode (YES in S504), the flowchart of FIG. 5 ends. On the other hand, when it is determined to continue (NO in S504), the processing after step S502 is repeated. When the shutter button 201 is pressed, the electronic device 100 terminates the reproduction mode and transitions to the imaging mode, and when the power button 206 is pressed, the electronic device 100 terminates the reproduction mode and transitions to the standby mode. .. Since these imaging modes and standby modes are well known, the description thereof will be omitted.

When it is determined that there is an output request (YES in S503), in step S505, the acquisition unit 152 searches for a communicable moving image data receiver using the wireless LAN unit 111, and obtains information on the found receiver. get. Specifically, the search for such a receiver and the acquisition of information are performed using an SSDP (Simple Service Discover Protocol) used in UPnP (Universal Plug and Play). The information to be acquired includes the product name of the receiver and the display capability information. In the case of the example shown in FIG. 3A, the acquisition unit 152 acquires the IP address shown in FIG. 3B and the display capability shown in FIG. 3C for the receivers 301 to 303.

In step S506, the selection unit 159 displays the information acquired in step S505 on the display unit 105. FIG. 7B is an example of display information displayed by the display unit 105 in step S506. The selection unit 159 displays a list of the product names of the receivers found in step S505 in the area 705, and causes the user to select a desired receiver from this list display. In step S507, the selection unit 159 waits for the user to select the receiver for outputting the moving image from the list display in the area 705 by using the operation unit 104.

In FIG. 7B, the user can move the frame 707 up and down using the up and down buttons 706. By pressing the selection button 708, the contents of the check box 709 corresponding to the receiver selected in the frame 707 are changed (toggle), and it is possible to select whether or not to output the moving image to the selected receiver. can. Further, the up / down button 706 selects the enter button 710 or the cancel button 711a, and the select button 708 is pressed to select whether or not to output the moving image.

Until the enter button 710 or the cancel button 711a is selected, the processes from step S505 to step S507 are repeated, and the search for communicable receivers is continued. Therefore, when the number of communicable receivers increases or decreases, the display of 705 in FIG. 7B is updated at any time. When the cancel button 711a is selected, it is assumed that the moving image is not output, and the flowchart of FIG. 5 ends.

In step S508, the determination unit 153 determines the format of the moving image data to be transmitted to each output target receiver (notified by the selection unit 159) selected in step S507.

Here, the process (determination process of the moving image data format) performed in step S508 will be described with reference to the flowchart of FIG.

In step S601, the determination unit 153 selects a combination candidate of the video data format that can be encoded by the image processing unit 109 with reference to the ability table 157. Here, it is assumed that the selection of the combination candidate of the video data format is performed in descending order of the quality of the video. Specifically, the combinations shown in FIG. 4 are selected in order from SET1.

In step S602, the determination unit 153 determines whether or not the combination of the moving image data formats could be selected in step S601. Specifically, if all the combinations shown in FIG. 4 have already been excluded by step S606 described later, it is determined that there is no candidate because a new combination of video data formats cannot be selected (NO in S602). .. In this case, it is not possible to output video data that can be displayed for all the receivers selected in step S507. Therefore, in step S603, the determination unit 153 displays an error message as shown in the display item 712 of FIG. 7 (c) on the display unit 105, and the flowchart of FIG. 6 ends (returns to step S509 of FIG. 5). ).

On the other hand, when a new combination of video data formats can be selected in step S601 (YES in S602), in step S604, the determination unit 153 selects the combination candidate of the video data format selected in step S601 in step S507. It is judged whether or not it can be displayed by all the receivers. Specifically, the determination unit 153 makes the above determination by comparing the candidate for the format combination of the moving image data selected in step S601 with the display capability of each receiver acquired in step S505. For example, a case where the receivers 301 and 302 are selected as output destinations in step S507 and SET1 is selected in step S601 will be described. According to FIG. 4, SET1 shows that 60p moving image data can be generated by FHD. On the other hand, according to (c) of FIG. 3, the receiver 301 can display this moving image data, but the receiver 302 cannot display it. Therefore, the determination in step S604 is NO. As another example, the case where SET3 is selected in step S601 will be described. According to FIG. 4, SET 3 shows that 30p video data in FHD and 60p video data in HD can be generated at the same time. On the other hand, according to (c) of FIG. 3, it can be seen that the receiver 301 can display both moving image data, and the receiver 302 can display 60p moving image data in HD. Therefore, the determination in step S604 is YES.

If YES in step S604, in step S605, the determination unit 153 stores the combination of the video data formats selected in the immediately preceding step S601 in the memory 102 for use in step S510 and subsequent steps, and the flowchart of FIG. 6 is shown. Finish (return to step S509 in FIG. 5). On the other hand, if NO in step S604, in step S606, the determination unit 153 excludes the combination of the moving image data formats selected in the immediately preceding step S601 from the candidates. Therefore, when the process from step S601 is repeated, the CPU 101 selects the next combination of moving image data formats in the list of the capability table 157.

In step S509, in step S508 (flow chart of FIG. 6), it is determined whether or not a combination of moving image data formats that can be displayed by all output destination receivers can be selected. If it is determined that the selection cannot be made, the CPU 101 executes the process of S504. On the other hand, if it is determined that the selection has been made, in step S510, the determination unit 153 outputs to each receiver from the combination of the receiver selected in step S507 and the video data format selected in step S508. The format of the moving image data is displayed on the display unit 105.

The display item 713 in FIG. 7D is an example of the display information displayed by the display unit 105 in step S510. For example, if receivers 301 and 302 are selected as output destinations in step S507, SET3 in FIG. 4 is selected in step S508 (flow chart of FIG. 6). In the display item 713 of FIG. 7 (d), 30p video data in FHD for the receiver 301 (described as “Digital TV ○○”) is transmitted to the receiver 302 (described as “Tablet △△”). On the other hand, it is displayed that 60p video data is output in HD. The receiver 301 can display either FHD @ 30p or HD @ 60p, but FHD @ 30p with higher image quality quality is applied. That is, when there are a plurality of moving image data in a format that can be displayed by one receiver in the determined combination, the moving image data having the highest moving image quality is selected for the one receiver.

In step S511, the determination unit 153 waits for the user to instruct the user to start outputting the moving image data using the operation unit 104. In FIG. 7D, the user can use the left and right buttons 703 to move the selection frame to the cancel button 711b or the start button 715. Then, by pressing the selection button 708, the cancel button 711b or the start button 715 is selected.

In FIG. 7D, when the start button 715 is selected, it is determined as an instruction to start playback (YES in S511). In this case, in step S512, the encoding unit 154 uses the image processing unit 109 to convert (encode) the moving image data selected in step S502 into the format of the moving image data to be transmitted to each receiver determined in step S508. / Transcode). Then, in step S513, the transmission control unit 155 uses the communication unit 151 (wireless LAN unit 111) to transmit the moving image data generated in step S512 to each receiver selected in step S507. At this time, the combination of the generated moving image data and the receiver of the transmission destination is shown on the display unit 105 in step S510.

In the above, the number of receivers selected as the transmission destination is two, and the combination of the selected formats also has two formats. Therefore, the transmission control unit 155 transmits the images generated in each format to the corresponding receivers by unicast. On the other hand, the number of formats that the selected combination has may be smaller than the number of receivers selected as the destination. For example, in the above example, it is assumed that a receiver having the same display capability as the receiver 301 is further selected as a transmission destination. In this case, when the determination unit 153 determines SET3, the combination has two formats, FHD @ 30p and HD @ 60p, for the three destinations. In this case, the transmission control unit 155 transmits a stream of images in a format (FHD @ 30p) common to the two receivers to the receiver 301 and another receiver by multi-scan. Further, the stream of the image in the format of the transmission control unit 155HD @ 60p is transmitted to the receiver 302 by uniscan. As described above, when the number of formats (number of streams) in the combination of image formats is smaller than the number of destinations, multicast is used together.

In step S514, the CPU 101 determines whether or not all the moving image data has been transmitted. If it is determined that all the moving image data has been transmitted (YES in S514), the CPU 101 repeats the process from step S502, and the user can select the image to be output next. If it is determined that the transmission has not been completed (NO in S514), in step S515, the detection unit 156 determines whether or not there is a receiver that has failed to transmit the moving image data by the communication unit 151. The transmission failure occurs, for example, when the power of the receiver is turned off or when the operation state (for example, during a call) in which the moving image data cannot be received is entered. When a transmission failure is detected (YES in S515), the number of receivers to be transmitted has decreased. Therefore, in this case, in step S518, the determination unit 153 determines the format of the moving image data to be transmitted to each of the remaining output target receivers by the same processing as the processing in step S508 (see the flowchart of FIG. 6). decide.

When there is no receiver that failed to transmit the moving image data (NO in S515), in step S516, the detection unit 156 searches for a communicable moving image data receiver using the wireless LAN unit 111, and by this search, the receiver is searched. Get the information of the found receiver. If no new receiver is found (NO in S516), the CPU 101 repeats the process from step S512 and continues encoding / transcoding. When a new receiver is found (YES in S516), in step S517, the detection unit 156 selects whether to newly output moving image data to the receiver newly detected in step S516. Accept.

FIG. 8A is an example of display information displayed by the display unit 105 in step S517. The CPU 101 displays the information of the new receiver detected in step S516 like the display item 801. The user can use the left and right buttons 703 to move the selection frame to the yes button 803 or the no button 804. Then, by pressing the selection button 708, the yes button 803 or the no button 804 is selected.

When the No button 804 is selected (NO in S517), there is no change in the combination of receivers of the output destination, and the CPU 101 repeats the processing after step S512 and continues encoding / transcoding. When the Yes button 803 is selected (YES in S517), the moving image is output to the newly detected receiver, so that the combination of receivers changes. Therefore, in step S518, the determination unit 153 performs the same processing as the processing in step S508 (see the flowchart of FIG. 6), and determines the format of the moving image data to be transmitted to each receiver to be output. If YES in step S515 (if there is a receiver that failed in transmission), the number of receivers to be output has decreased, and if YES in step S517, the number of receivers to be output has increased. Please note that you are doing.

In step S519, the determination unit 153 determines whether or not a combination of moving image data formats that can be displayed by all output destination receivers can be selected in step S517, as in step S509. If it can be selected (YES in S519), in step S520, the determination unit 153 changes the setting so as to generate the format of the moving image data determined in step S518, and repeats the processing after step S512. From this point onward, the combination of the formats of the moving image data generated by encoding / transcoding in step S512 and the receiver to which the moving image data is transmitted in step S513 will follow the determination items in step S518.

On the other hand, when the combination of the moving image data formats that can be displayed by all the output destination receivers cannot be selected in step S519 (NO in S519), in step S521, the determination unit 153 generates the previous moving image data formats. The setting is maintained so as to be performed, and the processing after step S512 is repeated. Therefore, the format of the moving image data generated by encoding / transcoding in step S512 and the receiver to which the moving image data is transmitted in step S513 are not changed. At this time, the determination unit 153 displays that the moving image cannot be output to the receiver newly detected in step S516 as in the display item 806 of FIG. 8B.

As described above, according to the first embodiment, when the moving image data is distributed while being encoded (encoded) to a plurality of display devices on the network, the processing capacity of the encoder is within the range of each display device. It is possible to transmit with an image quality suitable for the playback / display capability.

Although the example in which the electronic device 100 uses the wireless LAN has been described in the first embodiment, the configuration of the electronic device 100 is not limited to this. The electronic device 100 may be configured to use a wireless communication method (for example, Bluetooth®) different from the wireless LAN instead of the wireless LAN. Further, in the first embodiment, an example in which the electronic device 100 operates as a digital camera has been described, but the configuration of the electronic device 100 is not limited to this. The electronic device 100 may be configured to operate as at least one of a personal computer, a media player, a media server, a mobile phone, a PDA, a tablet computer, a smartphone, a game machine, and a digital video camera, for example.

<Embodiment 2>
The various functions, processes, or methods described in the first embodiment can also be realized by a personal computer, a microcomputer, a CPU (central processing unit), a processor, or the like by using a program. Hereinafter, in the second embodiment, a personal computer, a microcomputer, a CPU (central processing unit), a processor, and the like are referred to as "computer X". Further, in the second embodiment, a program for controlling the computer X and for realizing various functions, processes, or methods described in the first embodiment is referred to as a "program Y".

The various functions, processes or methods described in the first embodiment are realized by the computer X executing the program Y. In this case, the program Y is supplied to the computer X via a computer-readable storage medium. The computer-readable storage medium according to the second embodiment includes at least one such as a hard disk device, a magnetic storage device, an optical storage device, a photomagnetic storage device, a memory card, a volatile memory, and a non-volatile memory. The computer-readable storage medium according to the second embodiment is a non-transitory storage medium.

The embodiment of the present invention is not limited to the above-mentioned first or second embodiment. Embodiments 1 or 2 modified or modified without departing from the gist of the invention are also included in the embodiments of the present invention.

100: Electronic device, 101: CPU, 102: Memory, 103: Non-volatile memory, 104: Operation unit, 105: Display unit, 106: Storage medium I / F, 107: Storage medium, 108: Image pickup unit, 109: Image Processing unit, 110: Battery, 111: Wireless LAN unit, 112: System bus

Claims (9)

A determination means for determining whether one or more formats for allowing the selected video data to be displayed by all of the plurality of external devices can be determined.
When the one or more formats can be determined, an encoding means for encoding the selected moving image data to generate the moving image data in the one or more formats, and an encoding means.
When the one or more formats can be determined, a communication means for transmitting the generated moving image data in the one or more formats to each of the plurality of external devices, and a communication means.
When the one or more formats cannot be determined, the display control means for causing the display means to display information indicating that the selected moving image data cannot be provided to any of the plurality of external devices. An electronic device characterized by having. The electronic device according to claim 1, wherein each of the one or more formats is defined by a resolution and a frame rate of moving image data. Further, it has a first detecting means for detecting an external device in which communication by the communication means becomes impossible.
Can the determining means redetermine one or more formats for allowing all of the remaining external devices, excluding the external device detected by the first detecting means, from the plurality of external devices to be visible ? The electronic device according to claim 1 or 2, wherein it is determined whether or not the device is used. It further has a second detection means for detecting a new external device capable of communicating by the communication means.
The determining means determines whether one or more formats for allowing all of the plurality of external devices, including the plurality of external devices and the new external device, to be visible can be redetermined. The electronic device according to any one of claims 1 to 3, which is characterized. One of claims 1 to 4, wherein the determination means determines whether or not the one or more formats can be determined so that the resolution of the moving image data generated by the encoding means is high. The electronic device described in. Any one of claims 1 to 5, wherein the determination means determines whether or not the one or more formats can be determined so that the frame rate of the moving image data generated by the encoding means is high. The electronic device described in the section. The electronic device according to any one of claims 1 to 6, further comprising a selection means for allowing the user to select the plurality of external devices. It is a control method for electronic devices.
A decision step to determine if one or more formats can be determined so that the selected video data can be displayed by all of the multiple external devices.
When the one or more formats can be determined, the encoding step of encoding the selected moving image data to generate the moving image data of the one or more formats, and the encoding step.
When the one or more formats can be determined, the communication step of transmitting the generated moving image data of the one or more formats to each of the plurality of external devices, and
When the one or more formats cannot be determined, the display control step of displaying information indicating that the selected moving image data cannot be provided to any of the plurality of external devices is displayed on the display means. A control method characterized by having. Computer,
A determination means for determining whether one or more formats for allowing the selected video data to be displayed by all of the plurality of external devices can be determined.
When the one or more formats can be determined, an encoding means for encoding the selected moving image data to generate the moving image data in the one or more formats, and an encoding means.
When the one or more formats can be determined, a communication means for transmitting the generated moving image data in the one or more formats to each of the plurality of external devices, and a communication means.
When the one or more formats cannot be determined, as a display control means for causing the display means to display information indicating that the selected moving image data cannot be provided to any of the plurality of external devices. A program to make it work.

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