JP5361245B2 - Transmission / reception system, transmission / reception method by transmission / reception system, transmission apparatus, transmission method by transmission apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission and reception system which suitably and rapidly informs a user that a connection between a transmission device and a reception device can be broken when the user wants to view the rest of a video based upon stream data that the reception device receives from the transmission device. <P>SOLUTION: A DV camera 100 transmits the total amount of video data to a TV 101, transmits the stream data associated with the video data from the head of the video data, and further transmits a file associated with the video data from the end of the video data. The TV 101 stores the file received from the DV camera 100. Then the TV 101 informs the user that the connection between the DC camera 100 and TV 101 can be broken when the total of amounts of the stored file and video data included in the stream data received from the DV camera 100 so far reaches the total data amount. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention relates to a transmission / reception system including a transmission device that transmits stream data of video data and a reception device that receives the stream data from the transmission device, a transmission / reception method using the transmission / reception system, a transmission device, and a transmission method using the transmission device. .

  Some recent televisions (hereinafter referred to as TV) may receive stream data about video data from a digital video camera (hereinafter referred to as DV camera) connected thereto and display the video. There is something possible.

  By the way, in a situation where a plurality of users are watching the video displayed on the TV in this way, even though there is a user A who wants to continue watching the video, another user B takes a picture of the DV camera. You may want to use it.

  In such a case, when the user B takes the DV camera outdoors for shooting or the like, the connection between the TV and the DV camera is disconnected, and the TV receives the stream data from the DV camera and displays the video. I can't do that. For this reason, the user A cannot see the rest of the video.

  Therefore, even when the connection between the TV and the DV camera is disconnected while the TV receives the stream data from the DV camera and displays the video, the user A can view the rest of the video. Is important.

  As a method for enabling this, while the DV camera is transmitting the stream data for the video data to the TV, a file for the video data is separately transmitted from the DV camera to the TV, and the file is transmitted to the TV. The method of accumulating in can be considered. Then, after the connection between the TV and the DV camera is disconnected, the video can be displayed based on the file stored in the TV, so that the user A can view the remaining video.

  As a technique related to such a method, in Patent Document 1, non-real time reproduction is performed using a surplus bandwidth that is not used for transmission while transmitting a file of real time reproduction media to a file receiving apparatus. There has been proposed a file transmission apparatus for transmitting media files.

Here, the file of the real-time playback media is a file that stores data that is started to be played back in real time at the same time when data reception is started by the file receiving device. On the other hand, the file of the non-real time playback media is a file storing data to be played back after all received data is accumulated by the file receiving device.
Japanese Patent Laid-Open No. 9-270832

  However, in the technique disclosed in Patent Document 1, a non-real time playback media file is separately transmitted during real time playback media file transmission, but the transmission of the non real time playback media file is completed. There is no configuration for notifying the user of the fact. That is, with the technique disclosed in Patent Document 1, the user does not know that the accumulation of the file regarding the video data necessary for viewing the remaining video is completed.

  For this reason, in the technique disclosed in Patent Document 1, the connection between the TV and the DV camera is cut off too early, and the file storage of the video data is not completed, and the user can view the remaining video. You may not be able to see it.

  In addition, in the technique disclosed in Patent Document 1, the user may not notice that the connection between the TV and the DV camera can be disconnected even though the file of the video data has been accumulated. Therefore, in the technique disclosed in Patent Document 1, it is too late to disconnect the connection, and the TV disconnects the connection after waiting for the video to be displayed based on the stream data received from the DV camera. There are times when it will not change.

The present invention has been made to solve the above problems. That is, the present invention can disconnect the connection between the transmission device and the reception device appropriately and quickly when the user wants to view the remaining video for the video based on the stream data received from the transmission device by the reception device. It is an object of the present invention to provide a transmission / reception system capable of notifying a user, a transmission / reception method using a transmission / reception system, a transmission device, and a transmission method using a transmission device .

To achieve the above object, transmitting and receiving system of the present invention is a reception system comprising a transmitter and the receiver, the transmitting apparatus includes a recording means for recording the video data, the total data of the movies image data transmitting means for transmitting the amount of the receiving device, it is read from the beginning of the previous Kiutsu image data, and a stream transmitting means for transmitting the stream data to the receiving device, before the end of Kiutsu image data for each predetermined unit divided and, and a file transmission means for transmitting the file data to the receiving device, the receiving device, the total amount of video data transmitted by the transmitting means, transmitted by the stream transmission means stream Receiving means for receiving data and file data sent by the file sending means; and a file received by the receiving means The sum of the data amount of the stream data received by the receiving means and the data amount of the file data stored by the storage means matches the total data amount of the video data. A determination means for determining whether or not the sum is equal to a total amount of the video data by the determination means, the connection between the transmission device and the reception device can be disconnected. a notification unit that notifies the user, Ru comprising a. The file transmission unit of the transmission device responds to a request for disconnection of the connection between the transmission device and the reception device while the stream transmission unit is transmitting the stream data. The transmission of the file data is started .
The transmission / reception method of the present invention is a transmission / reception method by a transmission / reception system including a transmission device and a reception device, wherein the transmission device records video data, and the transmission device determines the total data amount of the video data. A transmitting step for transmitting to the receiving device; a stream transmitting step for reading from the head of the video data by the transmitting device and transmitting stream data to the receiving device; and a unit for each predetermined unit from the end of the video data. A file transmission step for transmitting file data to the receiving device, the total amount of the video data transmitted by the receiving device in the transmission step, and the stream data transmitted in the stream transmitting step. And a reception step for receiving the file data transmitted in the file transmission step. And a storage step for storing the file data received in the reception step, a data amount of the stream data received in the reception step, and a data amount of the file data stored in the storage step, A determination step for determining whether or not the total amount of video data matches, and the transmission device and the reception device when the determination step determines that the total matches the total data amount of the video data And a notification step for notifying the user that the connection with can be disconnected. The file transmission step includes the file data in response to a request from the user to disconnect the transmission device and the reception device while the stream transmission step is transmitting the stream data. Start sending.
The transmission apparatus of the present invention includes a recording means for recording video data, a transmission means for transmitting the total data amount of the video data to the reception apparatus, and reading stream data from the head of the video data to the reception apparatus. Stream transmitting means for transmitting, and file transmitting means for dividing the video data into predetermined units from the end of the video data and transmitting the file data to the receiving device. The file transmission unit transmits the file data in response to a request from the user to disconnect the transmission device and the reception device while the stream transmission unit is transmitting the stream data. To start.
The transmission method of the present invention is a transmission method by a transmission device, wherein a recording step of recording video data, a transmission step of transmitting the total amount of the video data to the reception device, and reading from the head of the video data A stream transmitting step for transmitting stream data to the receiving device, and a file transmitting step for dividing the video data into predetermined units from the end of the video data and transmitting the file data to the receiving device. The file transmission step includes the file data in response to a request from the user to disconnect the transmission device and the reception device while the stream transmission step is transmitting the stream data. Start sending.

  As described above, according to the present invention, for a video based on stream data received by a receiving device from a transmitting device, when the user wants to view the remaining video, the connection between the transmitting device and the receiving device is appropriately and quickly performed. There is an effect that it is possible to notify the user that disconnection is possible.

Example 1
FIG. 1 is a system configuration diagram of a transmission / reception system including a DV camera 100 as a transmission device and a TV 101 as a reception device. In the present embodiment, the DV camera 100 and the TV 101 are connected to be communicable via a wireless LAN, but are not limited to the wireless LAN.

  The DV camera 100 according to the present embodiment can transmit stream data regarding video data to the TV 101. Further, the DV camera 100 according to the present embodiment can transmit a file of video data to the TV 101.

  On the other hand, the TV 101 in the present embodiment can receive the stream data for the video data from the DV camera 100 and display the video. Further, the TV 101 in this embodiment can receive a file of video data from the DV camera 100 and display a video.

  In this embodiment, the DV camera 100 is used as the transmission device, but the transmission device in the present invention is not limited to the DV camera 100. In this embodiment, the TV 101 is used as the receiving device, but the receiving device in the present invention is not limited to the TV 101.

  FIG. 2 is a block diagram illustrating a schematic configuration of the DV camera 100 according to the first embodiment of the present invention.

  The recording unit 102 records video data. In response to an instruction from the control unit 106 described later, the stream transmission control unit 103 starts reading the video data recorded by the recording unit 102 from the top of the video data. Then, the stream transmission control unit 103 transfers the stream data regarding the read video data to the communication unit 105.

  In response to an instruction from the control unit 106 described later, the file transmission control unit 104 starts dividing the video data recorded by the recording unit 102 into a plurality of files from the end of the video data. Then, the file transmission control unit 104 transfers the divided file to the communication unit 105.

  In response to an instruction from the control unit 106 described later, the communication unit 105 superimposes the stream data transferred from the stream transmission control unit 103 and the file transferred from the file transmission control unit 104 and transmits the superimposed data to the TV 101. In addition, the communication unit 105 transmits the total amount of video data input from the control unit 106 described later to the TV 101.

  The control unit 106 determines whether any of the video data recorded by the recording unit 102 has been selected by the user. Note that the user selects video data using an operation unit (not shown) or a remote controller (not shown) that can operate the DV camera 100.

  Then, when the video data is selected by the user, the control unit 106 notifies the communication unit 105 of the total data amount of the selected video data. Next, the control unit 106 controls the stream transmission control unit 103 to start a stream data transfer process for the selected video data.

  The control unit 106 controls the file transmission control unit 104 to start the file transfer process for the selected video data simultaneously with the start of the stream data transfer process.

  Further, the control unit 106 controls the communication unit 105 to superimpose the stream data transferred from the stream transmission control unit 103 and the file transferred from the file transmission control unit 104 and transmit the data to the TV 101. To do. Such video data transmission processing will be described later with reference to FIG.

  Next, a schematic configuration of the TV 101 in Embodiment 1 of the present invention will be described. FIG. 3 is a block diagram illustrating a schematic configuration of the TV 101.

  The communication unit 107 receives data including stream data and files from the DV camera 100, and outputs the received data to the decomposition unit 108.

  The decomposition unit 108 decomposes the data input from the communication unit 107 into stream data and a file. The decomposition unit 108 outputs the stream data to the buffer 109 and the file to the storage unit 111. Further, when the data input from the communication unit 107 includes the total amount of video data, the decomposing unit 108 notifies the control unit 112 of the total data amount.

  The buffer 109 temporarily buffers the stream data input from the decomposition unit 108. Then, the buffer 109 outputs the buffered stream data to the first video decoding unit 110.

  The first video decoding unit 110 decodes the stream data input from the buffer 109 to generate video data. Then, the first video decoding unit 110 outputs the generated video data to the display switching unit 114.

  The storage unit 111 stores the file input from the decomposition unit 108. In the present embodiment, the storage unit 111 is incorporated in the TV 101, but is not limited thereto. For example, the storage unit 111 may be outside the TV 101 and connected to the TV 101.

  Here, the relationship between the stream data received by the TV 101 from the DV camera 100 and the file received by the TV 101 from the DV camera 100 will be described with reference to FIG.

  Stream data transmission processing for video data is started from the top of the video data. On the other hand, the file transmission process for video data starts from the end of the video data. Therefore, when the stream data and file transmission process proceeds, the total amount of video data included in the stream data and file received by the TV 101 from the DV camera 100 so far at some point in time is the total data of the video data. Match the quantity.

  Therefore, the control unit 112 determines the amount of video data included in the stream data received by the TV 101 from the DV camera 100 and the amount of video data included in the files received by the TV 101 from the DV camera 100 so far. And sum. Then, the control unit 112 determines whether or not the total amount of data matches the total amount of video data. Note that the control unit 112 is notified from the decomposition unit 108 about the total amount of video data.

  Next, when the control unit 112 determines that the total data amount matches the total data amount of the video data, the control unit 112 combines the files stored in the storage unit 111 to generate video data. And the control part 112 outputs the produced | generated video data to the 2nd video decoding part 113 mentioned later.

  Further, the control unit 112 causes the second video decoding unit 113 to output video data to be output to the display unit 115 described later from the video data input by the first video decoding unit 110 to the display switching unit 114 described later. Control to switch to the input video data. Finally, the control unit 112 controls the display unit 115 to display a message indicating that the DV camera 100 and the TV 101 can be disconnected on the display unit 115. Such detachable notification processing will be described later with reference to FIG.

  The second video decoding unit 113 decodes the video data input from the control unit 112. Then, the second video decoding unit 113 outputs the decoded video data to the display switching unit 114.

  The display switching unit 114 outputs the video data input from the first video decoding unit 110 to the display unit 115. However, when the display switching unit 114 receives an instruction from the control unit 112, the second video decoding unit 113 converts the video data output to the display unit 115 from the video data input by the first video decoding unit 110. Switch to the input video data. The display unit 115 displays a video based on the video data input from the display switching unit 114.

  Next, video data transmission processing for starting transmission of stream data for video data selected by the user to the TV 101 and simultaneously starting transmission of a file for the video data to the TV 101 will be described. This process is executed by the control unit 106. FIG. 5 is a flowchart showing video data transmission processing.

  In step S <b> 101, the control unit 106 determines whether any video data among the video data recorded by the recording unit 102 has been selected by the user.

  When it is determined that the video data has been selected by the user, the control unit 106 proceeds to step S102, and when it is determined that the video data has not been selected by the user, the control unit 106 returns to step S101.

  In step S102, the control unit 106 controls the communication unit 105 to cause the TV 101 to transmit the total data amount of the video data selected in step S101.

  In step S103, the control unit 106 controls the stream transmission control unit 103 to start the stream data transfer process for the video data selected in step S101 from the beginning of the video data.

  In step S104, the control unit 106 determines the difference between the bit rate necessary for transmitting the stream data for the video data that the stream transmission control unit 103 starts to transfer in step S103 and the maximum bit rate of the wireless LAN that is the transmission path. (Remainder bandwidth) is calculated.

  In step S105, the control unit 106 controls the file transmission control unit 104 to start the file transfer process for the video data selected in step S101 from the end of the video data.

  Specifically, the control unit 106 controls the file transmission control unit 104 to start dividing the video data selected in step S101 into a plurality of files from the end of the video data. The file transmission control unit 104 divides the video data selected in step S101 into a plurality of files for each unit that can be reproduced independently. For example, when the video data is compression-encoded with MPEG2, the file transmission control unit 104 divides the video data for each GOP.

  Then, the control unit 106 controls the file transmission control unit 104 to start transfer processing of the file storing the divided video data to the communication unit 105. At this time, the file transmission control unit 104 transfers the file to the communication unit 105 so that the communication unit 105 can transmit the file to the TV 101 using the surplus bandwidth calculated in step S103.

  Thus, the control unit 106 starts transmission of the file for the video data selected in step S101 from the end of the video data, so the transmission start timing of the file is considered in consideration of the bandwidth of the transmission path and the like. There is no need to calculate.

  Note that the control unit 106 executes the processes in steps S103 to S105 at the same time. That is, the control unit 106 controls the stream transmission control unit 103 to start the stream data transfer process, and at the same time controls the file transmission control unit 104 to start the file transfer process.

  In step S106, the control unit 106 controls the communication unit 105 to transmit the data received by the communication unit 105 from the stream transmission control unit 103 and the file transmission control unit 104 to the TV 101.

  Specifically, first, the control unit 106 sends the stream data received by the communication unit 105 from the stream transmission control unit 103 and the file received by the communication unit 105 from the file transmission control unit 104 to the communication unit 105. Superimpose. Then, the control unit 106 controls the communication unit 105 to transmit the superimposed data to the TV 101.

  Next, a detachable notification process for notifying the user of the timing at which the DV camera 100 and the TV 101 can be disconnected will be described. This process is executed by the control unit 112. FIG. 6 is a flowchart showing the detachable notification process.

  In step S201, the control unit 112 determines whether or not the total data amount of the video data has been notified from the decomposition unit 108. When it is determined that the total amount of video data has been notified from the decomposition unit 108, the control unit 112 proceeds to step S202, and when it is determined that the total amount has not been notified, the control unit 112 returns to step S201.

  In step S202, the control unit 112 determines the amount of video data included in the stream data received by the TV 101 from the DV camera 100 and the video data included in the files received by the TV 101 from the DV camera 100 so far. Sum the amount of data. Specifically, the control unit 112 is included in each of the total amount of video data included in the stream data received by the communication unit 107 from the DV camera 100 so far and each of the files accumulated so far by the storage unit 111. The total amount of data is obtained by adding up the total amount of video data.

  In step S203, the control unit 112 determines whether or not the total data amount obtained in step S202 matches the total data amount notified in step S201.

  Specifically, when the total data amount obtained in step S202 is equal to or larger than the total data amount notified in step S201, the control unit 112 determines that the total data amount is the total data amount notified in step S201. It is determined that they match. On the other hand, if the total data amount obtained in step S202 is not equal to or greater than the total data amount notified in step S201, the control unit 112 matches the total data amount notified in step S201. Judge that it is not.

  If the control unit 112 determines that the total data amount obtained in step S202 matches the total data amount notified in step S201, the control unit 112 proceeds to step S204. If it determines that the total data amount does not match, the control unit 112 returns to step S202.

  In step S204, the control unit 112 controls the second video decoding unit 113 to decode the video data generated by the control unit 112 by combining the files stored in the storage unit 111. Specifically, the control unit 112 combines video files stored in the storage unit 111 to generate video data.

  Next, the control unit 112 inputs the generated video data to the second video decoding unit 113. Then, the control unit 112 controls the second video decoding unit 113 to decode the input video data.

  In step S205, the control unit 112 receives the video data to be output to the display unit 115 from the video data input by the first video decoding unit 110 to the display switching unit 114 by the second video decoding unit 113. The video data is controlled to be switched. At this time, the control unit 112 controls the display switching unit 114 so that the video data input by the first video decoding unit 110 and the video data input by the second video decoding unit 113 are synchronized.

  In step S206, the control unit 112 displays a message indicating that the DV camera 100 and the TV 101 can be disconnected on the display unit 115. Thereby, the user can know the timing at which the DV camera 100 and the TV 101 can be separated.

  As described above, the transmission apparatus according to the present embodiment starts transmitting the stream data for the video data to the reception apparatus from the beginning of the video data, and simultaneously transmits the file for the video data to the reception apparatus from the end of the video data. Start sending. In addition, the receiving device in the present embodiment, when the total data amount of the video data included in the stream data and the file received from the transmitting device matches the total data amount of the video data, between the transmitting device and the receiving device. Notify the user that the connection can be disconnected.

  As a result, the transmission / reception system in the present embodiment connects the transmission device and the reception device more quickly when the user wants to view the remaining video with respect to the video based on the stream data received from the transmission device by the reception device. Can be notified to the user that it can be disconnected.

(Example 2)
In the first embodiment, the DV camera 100 starts the transmission process of the stream data for the video data and the transmission process of the file for the video data at the same time. However, the DV camera 100 according to the present exemplary embodiment transmits a file for video data when the user requests disconnection of the connection between the DV camera 100 and the TV 101 during transmission processing of stream data for video data. Start processing. Only differences from the first embodiment will be described below.

  In the present embodiment, when the user requests disconnection of the connection between the DV camera 100 and the TV 101, the control unit 106 transfers a file transfer process for the video data selected by the user to the file transmission control unit 104. Control to start. Note that the user makes a disconnection request for the connection between the DV camera 100 and the TV 101 using an operation unit (not shown) or a remote controller (not shown) capable of operating the DV camera 100.

  Subsequently, when the user requests disconnection of the connection between the DV camera 100 and the TV 101 during the stream data transmission process for the video data selected by the user, the file transmission process for the video data is started. A video data transmission process for this will be described. This process is executed by the control unit 106. FIG. 7 is a flowchart showing video data transmission processing in the present embodiment.

  Step S301 is the same as step S101 shown in FIG.

  Step S302 is the same as step S103 shown in FIG.

  In step S303, the control unit 106 controls the communication unit 105 to transmit the stream data received by the communication unit 105 from the stream transmission control unit 103 to the TV 101.

  In step S304, the control unit 106 determines whether or not the user has requested disconnection of the connection between the DV camera 100 and the TV 101. The control unit 106 proceeds to step S305 if it is determined that the user has requested disconnection of the connection between the DV camera 100 and the TV 101, and returns to step S304 if it is determined that it is not requested.

  Step S305 is the same as step S102 shown in FIG.

  Steps S306 to S308 are the same as steps S104 to S106 shown in FIG.

  As described above, when the transmission device in the present embodiment transmits a stream data of video data to the receiving device from the head of the video data, when a request is received from the user, the file of the video data is saved. Then, transmission to the receiving device starts from the end of the video data. In addition, the receiving device in the present embodiment, when the total data amount of the video data included in the stream data and the file received from the transmitting device matches the total data amount of the video data, between the transmitting device and the receiving device. Notify the user that the connection can be disconnected.

  As a result, the transmission / reception system in the present embodiment does not start the file transmission process for the video data when the user does not need to disconnect the connection between the transmission device and the reception device. The communication bandwidth can be used efficiently.

  In this embodiment, the user makes a disconnection request for the connection between the DV camera 100 and the TV 101 using an operation unit (not shown) or a remote control (not shown) that can operate the DV camera 100. This is not a limitation. For example, an operation unit (not shown) that can operate the TV 101 or a remote controller (not shown) may be used.

  In such a case, the control unit 112 determines whether or not the user has instructed disconnection of the connection between the DV camera 100 and the TV 101. Next, when the user gives an instruction to disconnect the connection between the DV camera 100 and the TV 101, the control unit 112 controls the communication unit 107 to transmit the instruction to the DV camera 100.

  Subsequently, when the communication unit 105 receives from the TV 101 that the user has instructed disconnection of the connection between the DV camera 100 and the TV 101, the communication unit 105 notifies the control unit 106 of the instruction. When the communication unit 105 is notified of the instruction in step S304 illustrated in FIG. 7, the control unit 106 determines that the user has requested disconnection of the connection between the DV camera 100 and the TV 101. On the other hand, if the communication unit 105 does not notify that the instruction has been given, the control unit 106 determines that the user is not requested to disconnect the DV camera 100 and the TV 101.

1 is a system configuration diagram of a transmission / reception system having a DV camera 100 as a transmission device and a TV 101 as a reception device in Embodiment 1 of the present invention. It is a block diagram which shows schematic structure of the DV camera 100 as Example 1 of a transmission apparatus in this invention. It is a block diagram which shows schematic structure of TV101 as a receiver in Example 1 of this invention. It is the figure which showed about the relationship with the stream data and file which TV101 received from the DV camera 100 in Example 1 of this invention. It is a flowchart which shows the video data transmission process in Example 1 of this invention. It is a flowchart which shows the detachable timing notification process in Example 1 of this invention. It is a flowchart which shows the video data transmission process in Example 2 of this invention.

Explanation of symbols

100 DV camera 101 TV
DESCRIPTION OF SYMBOLS 102 Recording part 103 Stream transmission control part 104 File transmission control part 105 Communication part 106 Control part 107 Communication part 108 Decomposition part 109 Buffer 110 1st video decoding part 111 Storage part 112 Control part 114 Display switching part 115 Display part

Claims (10)

A transmission / reception system comprising a transmission device and a reception device,
The transmitter is
Recording means for recording video data ;
Transmitting means for transmitting the total data amount of the Film image data to the receiving device,
Is read from the beginning of the previous Kiutsu image data, and a stream transmitting means for transmitting the stream data to the receiving device,
Separately from the end of the previous Kiutsu image data for each predetermined unit, and a file transmission means for transmitting the file data to the receiving device,
The receiving device is:
The total amount of video data transmitted by the transmitting means, and the stream data transmitted by the stream transmission means, a receiving means for receiving a file data transmitted by the file transmission means,
Storage means for storing file data received by the receiving means;
Determining means for determining whether the sum of the data amount of the stream data received by the receiving means and the data amount of the file data accumulated by the accumulating means coincides with the total data amount of the video data; ,
Notification means for notifying a user that the connection between the transmission device and the reception device can be disconnected when the determination means determines that the total matches the total data amount of the video data. ,
The file transmission unit of the transmission device is configured to respond to a request from the user to disconnect the transmission device and the reception device while the stream transmission unit is transmitting the stream data. transmission and reception system, characterized that you start the transmission of the file data. The receiving device is:
When the determination unit determines that the total matches the total data amount of the video data, the storage unit converts the video to be displayed on the display unit from the video related to the stream data received by the reception unit. transmission and reception system according to claim 1, further comprising a display control hand stage to switch to the video according to the stored file data. The file transmission means of said transmitting apparatus before split from the end of Kiutsu image data for each GOP unit, according to claim 1 or claim 2, characterized in that to transmit the file data to the receiving device Transmission / reception system. A transmission / reception method by a transmission / reception system comprising a transmission device and a reception device,
A recording step in which the transmission device records video data;
A transmitting step in which the transmitting device transmits a total data amount of the video data to the receiving device;
A stream transmission step in which the transmitting device reads from the head of the video data and transmits stream data to the receiving device;
A file transmission step in which the transmission device divides the video data into predetermined units from the end of the video data, and transmits file data to the reception device;
A receiving step in which the receiving device receives the total amount of the video data transmitted in the transmitting step, the stream data transmitted in the stream transmitting step, and the file data transmitted in the file transmitting step. When,
An accumulation step for accumulating the file data received in the reception step;
A determination step for determining whether a sum of the data amount of the stream data received in the reception step and the data amount of the file data stored in the storage step matches a total data amount of the video data; ,
A notification step of notifying the user that the connection between the transmission device and the reception device can be disconnected when the determination step determines that the total matches the total data amount of the video data. And
The file transmission step transmits the file data in response to a user requesting disconnection of the connection between the transmission device and the reception device while the stream transmission step is transmitting the stream data. A transmission / reception method characterized by starting When it is determined in the determination step that the total matches the total data amount of the video data, the video to be displayed on the display unit is changed from the video related to the stream data received in the reception step, The transmission / reception method according to claim 4, further comprising a display control step of switching to an image related to the accumulated file data. 6. The transmission / reception method according to claim 4, wherein in the file transmission step, the file data is transmitted to the receiving device after being divided into GOP units from the end of the video data. Recording means for recording video data;
Transmitting means for transmitting the total amount of the video data to the receiving device;
Stream transmission means for reading from the head of the video data and transmitting stream data to the receiving device;
File transmission means for dividing the video data into predetermined units from the end and transmitting file data to the receiving device;
The file transmission unit transmits the file data in response to a request from the user to disconnect the transmission device and the reception device while the stream transmission unit is transmitting the stream data. A transmission apparatus characterized by starting 8. The transmission apparatus according to claim 7, wherein the file transmission unit divides the video data into GOP units from the end of the video data and transmits the file data to the reception apparatus. A transmission method by a transmission device,
A recording step for recording video data;
A transmission step of transmitting a total data amount of the video data to the receiving device;
A stream transmission step of reading from the head of the video data and transmitting stream data to the receiving device;
A file transmission step of dividing the video data into predetermined units from the end of the video data and transmitting the file data to the receiving device;
The file transmission step transmits the file data in response to a user requesting disconnection of the connection between the transmission device and the reception device while the stream transmission step is transmitting the stream data. The transmission method characterized by starting. 10. The transmission method according to claim 9, wherein in the file transmission step, the file data is divided into GOP units from the end of the video data and transmitted to the receiving device.

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