JP2009159313A - Data transmission device, data reception device, control method of data transmission device, data transmission device control program, and computer-readable recording medium recording the program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To transmit a control signal related to data by using a communication path different from a communication path for transmitting data. <P>SOLUTION: A video recording reproduction device 1 has a command generator 16 transmitting an iLink switching command related to data transmission to a video display device 2 by using an HDMI cable 23 different from an iLink cable 24 used for data transmission. Thus, the HDMI cable 23 different from the iLink cable 24 transmitting the data is used, to transmit the iLink switching command related to the data. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a data transmission apparatus, in particular a data reception apparatus connected by a plurality of cables, and only one of them transmits / receives a control signal for data to be transmitted, a data reception apparatus, and a data transmission apparatus control The present invention relates to a method, a data transmission device control program, and a computer-readable recording medium on which the program is recorded.

  In recent years, multiple video playback devices such as DVD players, hard disk recorders, personal computers, etc. are connected to video output devices such as televisions, and the TV, DVD player, hard disk recorder, and personal computer can be operated with a single remote controller (remote controller). A possible system is provided.

  An example of this system is shown in FIG. FIG. 7 is a diagram showing a system in which a television 82, a recorder 83, a recorder 84, and a personal computer 85, which can be operated with one remote controller 81, are connected.

  As shown in FIG. 7, the TV 82, the recorder 83, and the recorder 84 are connected by high-definition multimedia interface (HDMI) cables 86 and 87, and the TV 82 and the personal computer 85 are connected to the HDMI cable 88 and iLink (registered trademark). ) It is connected with the cable 89 by two cables. The HDMI cable 86, the HDMI cable 87, the HDMI cable 88, and the iLink cable 89 are connected to the television 82 via the video input 801, the video input 802, the video input 804, and the video input 803, which are video input terminals of the television 82, respectively. Connected.

  Here, a case where a reproduction command is transmitted from the remote control 81 to the television 82 will be described.

  First, when a “play button” is pressed on the remote control 81, a “play command” is transmitted from the remote control 81 to the television 82. This is transmitted by infrared.

  The television 82 that has received the “play command” determines to which playback device the “play command” is to be transmitted.

  This is done as follows. First, the television 82 is currently displaying a television image received from a tuner unit (not shown), or a video input terminal (recorder 83, recorder 84, personal computer 85) connected to each video reproduction device ( It is determined which of the video inputs 801, 802, and 804) is in a state (active state) in which the video received from the video input terminal can be displayed.

  If a TV image is currently being displayed, a “play command” is transmitted to the most recently played video playback device (here, recorder 83). The recorder 83 receives the “playback command” and transmits an “active request command” to the television 82. The television 82 that has received the “active request command” switches the video input terminal to the video input 801 to which the HDMI cable 86 that has received the request is connected. Thereafter, the recorder 83 performs reproduction.

  By such processing, the video reproduced by the recorder 83 is displayed on the television 82.

  On the other hand, if any of the video input terminals is currently in the active state, the television 82 transmits a “playback command” to the video playback device connected to the video input terminal in the active state. For example, when the video playback device connected to the video input terminal in the active state is the recorder 84, the television 82 transmits a “playback command” to the recorder 84. The recorder 84 that has received the “play command” transmits an “active request command” to the television 82.

  The television 82 that has received the “active request command” maintains the active state of the video input 802 that has received the request. Then, the recorder 84 performs reproduction.

  By such processing, the video reproduced by the recorder 84 is displayed on the television 82.

Patent Document 1 discloses a technique for controlling a device connected to a network with a remote controller.
JP 2002-232978 A (released on August 16, 2002)

  However, in the above method, when the video playback device displaying the playback data most recently or the video playback device connected to the currently active video input terminal is the personal computer 85, The video reproduced at 85 cannot be displayed on the television 82.

  This is due to the following reason. That is, when the video playback device that was last played back or the video playback device connected to the video input terminal that is currently active is the personal computer 85, the television 82 transmits a “play command” to the personal computer 85. . This is done using the HDMI cable 88 via the video input 804.

  The personal computer 85 that has received the “play command” transmits an “active request command” to the television 82. Then, the television 82 that has received the “active request command” activates (or maintains the active state) the video input 804 that has received the request.

  Then, the personal computer 85 transmits the playback video using the iLink cable 89.

  Therefore, the playback video from the personal computer 85 is transmitted using the iLink cable 89, and the TV 82 is in the active state of the video input 804 connected to the HDMI cable 88. The displayed video cannot be displayed.

  Note that the playback video from the personal computer 85 is transmitted via the iLink cable 89 instead of the HDMI cable 88 for the following reason.

  That is, when video data received from the tuner unit of the television 82 is stored in the personal computer 85 via the iLink cable 89, the video data is displayed on the television 82 via the HDMI cable 88 when the personal computer 85 reproduces the video data. And cause copyright law problems. Specifically, when the video data stored in the personal computer 85 via the iLink cable 89 is displayed on the television 82 via the HDMI cable 88, the video data is duplicated. Therefore, in order not to perform the duplication processing, the personal computer 85 needs to transmit video data using the same cable as the received cable.

  At present, the television 82 displays a video reproduced by the personal computer 85 by using the following method.

  First, when video data is transmitted from the iLink cable 89 to the television 82, a function is added to activate the video input 803 to which the iLink cable 89 is connected. As a result, when the reproduced video is transmitted using the iLink cable 89, the television 82 automatically activates the video input 803.

  The “reproduction command” from the remote control 81 is not transmitted to the personal computer 85 via the television 82, but the personal computer 85 can directly receive the “reproduction command” from the remote control 81.

  As a result, the video reproduced by the personal computer 85 can be displayed on the television 82.

  The present invention makes it possible to display a video reproduced by the personal computer 85 on the television 82 without adding a special function to the television 82 and the personal computer 85 as described above.

  That is, an object of the present invention is to transmit a control signal related to data when the data receiving device and the data transmitting device are connected by a plurality of communication paths and data is transmitted to the data receiving device using one of them. It is to transmit by a communication path different from the communication path to be performed.

  In order to solve the above problems, a data transmitting apparatus according to the present invention is connected to a data receiving apparatus through a plurality of communication paths, and transmits data to the data receiving apparatus using one of the plurality of communication paths. A data transmitting apparatus for transmitting, wherein a first control signal related to the transmission of the data is transmitted to the data receiving apparatus using a communication path different from a communication path used for transmitting the data among the plurality of communication paths. It is characterized by comprising a control signal transmitting means for transmitting to.

  Further, the control method of the data transmitting apparatus according to the present invention is a data which is connected to the data receiving apparatus through a plurality of communication paths and transmits data to the data receiving apparatus using one of the plurality of communication paths. A control method for a transmitting device, wherein a first control signal related to the transmission of the data is transmitted using a communication path other than the communication path used for transmitting the data among the plurality of communication paths. A control signal transmitting step for transmitting to the receiving device is included.

  According to the above configuration and method, the first control signal related to the data transmission is transmitted to the data receiving apparatus using a communication path different from the communication path used for data transmission among the plurality of communication paths. The

  Thereby, the first control signal related to the data transmission can be transmitted using a communication path different from the communication path used for data transmission.

  Further, for example, the first control signal indicates that data is being transmitted through a communication path different from the communication path through which the control signal is transmitted, and the data receiving apparatus includes a display unit, A communication path different from the first control signal as long as it displays data received from a communication path different from the communication path from which the first control signal is received when the first control signal is received. The data transmitted from can be displayed on the data receiving device.

  Furthermore, in the data transmission device according to the present invention, a storage unit storing a table in which data to be transmitted and a communication path used for transmission of the data are associated with each other, and a second data for specifying the data to be transmitted Control signal receiving means for receiving a control signal from the data receiving device; communication path selecting means for selecting a communication path associated with the specific data specified by the second control signal with reference to the table; Data for transmitting the specific data using the selected communication path when the selected communication path selected by the communication path selecting means is different from the communication path from which the control signal receiving means has received the second control signal. The control signal transmitting means transmits the specific data using the selected communication path before the data transmitting means transmits the specific data. A control signal indicating the fact, as the first control signal, it is preferable that transmitted by using a communication path which has received the second control signal.

  According to said structure, a communication path | route selection means further selects the communication path | route matched with the specific data which should be transmitted specified with the received 2nd control signal with reference to a table. When the selected communication path is different from the communication path from which the control signal receiving means has received the second control signal, the control signal transmitting means is a control indicating that specific data is transmitted using the selected communication path. A signal is transmitted as the first control signal using the communication path that has received the second control signal. Thereafter, the data transmission means transmits the specific data using the selected communication path.

  Thereby, it is possible to make the data receiving apparatus recognize that data is transmitted using a selected communication path different from the communication path that has received the second control signal. Therefore, when the data receiving apparatus recognizes the data, when the data received from the selected communication path is displayed, the data transmitted using the selected communication path can be displayed on the data receiving apparatus. Play.

  In the data transmission device according to the present invention, when the second control signal is a two data transmission signal that specifies two data to be transmitted simultaneously, the control signal transmission means includes the selected communication path Before the data transmission means transmits data different from the communication path on which the control signal receiving means has received the second control signal, a control signal indicating that the data is transmitted using the selected communication path The first control signal is preferably transmitted using the communication path that has received the second control signal.

  According to the above configuration, when a two-data transmission signal is received as the second control signal, the control signal transmission unit communicates with the selected communication path through which the control signal reception unit has received the second control signal. Before the data transmitting means transmits data different from the path, the control signal indicating that the data is transmitted using the selected communication path is used as the first control signal, and the second control signal is used. Transmit using the received communication path.

  As a result, of the two data to be transmitted, the data transmitted through the communication path different from the communication path used for transmitting the first control signal is transmitted to the data receiving apparatus. It can be recognized that the transmission is performed through a communication path different from the communication path used in the above.

  Therefore, for example, if the data received from a communication path different from the communication path that received the control signal can be displayed on two screens at the same time, the data transmitting apparatus displays the two transmitted data on the two screens on the data receiving apparatus. There is an effect that can be made.

  Furthermore, the above-described effect can be achieved even when the communication path through which the control signal transmission unit transmits the first control signal is a communication path conforming to the HDMI (high-definition multimedia interface) standard. .

  For example, the above-described effects can be achieved even with a personal computer or the like that is connected to a television with a plurality of cables, at least one of which is an HDMI cable, and that transmits a control signal only through the HDMI cable.

  In order to solve the above problems, a data receiving apparatus according to the present invention is connected to a data transmitting apparatus through a plurality of communication paths, and receives data from the data transmitting apparatus using one of the plurality of communication paths. And a first control signal related to reception of the data is transmitted from the data transmission device using a communication path different from the communication path used for receiving the data among the plurality of communication paths. A display device control signal receiving means for receiving and a data receiving means for receiving the data are provided.

  According to said structure, the 1st control signal in connection with reception of the said data is received from the said data transmission apparatus using the communication path different from the communication path used for reception of data among several communication paths. Then, the data is received from the data transmitting device.

  Thus, for example, if the first control signal indicates that data is being transmitted via a communication path different from the communication path receiving the control signal, the first control signal is received. Thus, it can be recognized that data is received from a communication path different from the communication path that has received the first control signal, and data can be received from the communication path. And if a data receiver is provided with a display part, there exists an effect that the received data can be displayed.

  Even in a data transmission system including the data transmission device and the data reception device, the above-described effects can be obtained.

  The data transmission device may be realized by a computer. In this case, a control program for the data transmission device that causes the data transmission device to be realized by the computer by causing the computer to operate as the respective means, and A computer-readable recording medium on which is recorded also falls within the scope of the present invention.

  As described above, the data transmission device according to the present invention uses the communication path different from the communication path used for data transmission among the plurality of communication paths to transmit the first control signal related to the data transmission described above. It is the structure provided with the control signal transmission means transmitted to a data receiver.

  In addition, the control method of the data transmission device according to the present invention uses the communication path different from the communication path used for data transmission among the plurality of communication paths, and transmits the first control signal related to the data transmission described above. A method includes a control signal transmission step of transmitting to a data receiving device.

  Thereby, the first control signal related to the data transmission can be transmitted using a communication path different from the communication path used for data transmission.

  In addition, for example, the first control signal indicates that data is being transmitted through a communication path different from the communication path through which the control signal is transmitted. If a signal is received and data received from a communication path different from the communication path from which the first control signal is received is displayed, data transmitted from a communication path different from the first control signal is displayed. The data receiving device can be displayed.

  Furthermore, the data receiving apparatus according to the present invention uses a communication path different from the communication path used for receiving the data among a plurality of communication paths to transmit the first control signal related to the data reception to the data transmission. The display device control signal receiving means for receiving from the device and the data receiving means for receiving the data.

  Thus, for example, if the first control signal indicates that data is being transmitted via a communication path different from the communication path receiving the control signal, the first control signal is received. Thus, it can be recognized that data is received from a communication path different from the communication path that has received the first control signal. And if a data receiver is provided with a display part, there exists an effect that the data received from the said communication path can be displayed.

[Embodiment 1]
One embodiment of the present invention will be described below with reference to FIGS. In the following, a case where two cables are used as a plurality of communication paths will be described, but the present invention is not limited to this. The communication path may not be two, and may be connected wirelessly instead of wired.

  FIG. 1 shows a video display device (data receiving device) 2 connected to a video recording / playback device (data transmission device) 1, a remote controller 3, and other video recording / playback devices 4, 5 according to the present embodiment. FIG. 2 is a block diagram showing an outline of the video playback system 20, the main configuration of the video display device 2, and the main configuration of the video recording / playback device 1.

  As shown in FIG. 1, in the video reproduction system 20, communication can be performed between the remote control 3 and the video display device 2 using infrared rays. The HDMI input / output unit 201 that is a video input terminal of the video display device 2 is connected to the video recording / playback device 4 via the HDMI cable 21, and the HDMI input / output unit 202 is connected to the video recording / playback device 5 and the HDMI. They are connected via a cable 22.

  The HDMI input / output unit 203 which is a video input terminal of the video display device 2 is connected to the video recording / reproducing device 1 via the HDMI cable (communication path) 23, and the iLink input / output unit 204 is connected to the iLink cable ( The video recording / playback apparatus 1 is connected via a communication path 24. That is, the HDMI input / output unit 203 and the iLink input / output unit 204 are connected to the video recording / playback apparatus 1 which is the same video playback apparatus.

  In this embodiment, a signal (command) for controlling each video recording / playback apparatus can be transmitted / received only via the HDMI cable, and only data such as video data can be transmitted / received via the iLink cable. .

  As shown in FIG. 1, the video recording / playback apparatus 1 includes an HDMI interface unit 11, an iLink interface unit 12, a data transmission / reception unit (data transmission unit) 13, a storage unit 14, and a command determination unit (communication path selection unit, control signal reception). Means) 15 and a command generation unit (control signal transmission means) 16.

  The HDMI interface unit 11 is an interface unit to which the HDMI cable 23 is connected, and receives data such as commands and video data transmitted from the HDMI input / output unit 203 of the video display device 2 via the HDMI cable 23. The data is transmitted to the data transmitter / receiver 13. Further, data such as a command and video data received from the data transmission / reception unit 13 is transmitted to the HDMI input / output unit 203 of the video display device 2.

  The iLink interface unit 12 is an interface unit to which an iLink cable 24 is connected. The iLink interface unit 12 receives data such as video data transmitted from the iLink input / output unit 204 of the video display device 2 via the iLink cable 24 and receives data. The data is transmitted to the transmission / reception unit 13. Also, data such as video data received from the data transmission / reception unit 13 is transmitted to the iLink input / output unit 204 of the video display device 2.

  The data transmission / reception unit 13 stores data such as video data received from the HDMI interface unit 11 or the iLink interface unit 12 in the storage unit 14. In addition, data such as video data stored in the storage unit 14 is transmitted to the video display device 2 via the HDMI interface unit 11 or the iLink interface unit 12.

  Here, the data transmission / reception unit 13 uses the HDMI interface unit 11 or the iLink interface unit 12 to perform video data to be transmitted to the video display device 2 based on an instruction from the command determination unit 15.

  The storage unit 14 includes data such as video data received by the data transmission / reception unit 13, a table indicating correspondence between command contents and command numbers, a table indicating data transmission cables corresponding to the data contents, the latest reproduction target data, and the like. Is remembered. A specific example of the storage unit 14 is a flash memory that can store a large amount of data and can be erased and rewritten.

  Here, FIGS. 3 and 4 show the contents of the table stored in the storage unit 14. FIG. 3 shows a command number table 301 indicating the correspondence between command contents and command numbers, and FIG. 4 shows a cable correspondence table 401 showing the correspondence between data contents and cables to be used for transmission.

  The correspondence between the file name of the data stored in the cable correspondence table 401 and the cable to be used for transmission is determined for the following reason.

  That is, the video data stored in the storage unit 14 is video data received from the tuner unit 209 provided in the video display device 2, video data acquired from the Internet by the video recording / playback device 1 or the like.

  In the case of the data received from the tuner unit 209, the data cannot be transmitted by a cable different from the cable used for receiving the video data due to the above-mentioned problem in the copyright law. That is, video data received using the iLink cable 24 cannot be transmitted using the HDMI cable 23.

  For this reason, a cable to be used for transmitting video data is determined. Also, this cannot be changed by the user.

  For example, in the table shown in FIG. 3, the video data A is video data acquired via the iLink cable 24 and transmitted via the iLink cable 24. And the cable used for transmission by the user cannot be changed.

  The video data B is acquired from a local area network (LAN) (not shown) and transmitted through the iLink cable 24. Since the video data B is not video data acquired from the video display device 2, the cable used for transmission can be changed to the HDMI cable 23.

  On the other hand, since the video data C is acquired through the HDMI cable 23, it can be transmitted only using the HDMI cable 23, and the cable used for transmission cannot be changed.

  Further, a cable used for transmission is changed by a transmission cable changing unit (not shown). The transmission cable changing unit refers to the cable correspondence table 401 with respect to the change instruction received from the user or the like, determines whether or not the target data can be changed, and if it can be changed, changes the transmission cable, If it cannot be changed, the transmission cable is not changed.

  The command determination unit 15 uses the cable correspondence table 401 stored in the storage unit 14 for the instruction indicated by the command received via the HDMI interface unit 11 for data transmitted from the HDMI interface unit 11. It is determined whether the data is transmitted from the iLink interface unit 12. Then, the determination result is transmitted to the data transmitter / receiver 13 and the command generator 16.

  For example, when the received command is a “reproduction command”, the command determination unit 15 determines that the reproduction target is the video data A from the reproduction record stored in the storage unit 14, and the reproduction of the video data A from the table is , It is determined to be performed via the iLink interface unit 12. Then, the contents are transmitted to the data transmitting / receiving unit 13. The data transmission / reception unit 13 transmits the reproduction data of the video data A stored in the storage unit 14 to the video display device 2 via the iLink interface unit 12 based on the received content.

  When it is necessary to newly generate a command based on the determination result received from the command determination unit 15, the command generation unit 16 generates a command and transmits it to the video display device 2 via the HDMI interface unit 11.

  For example, when the content “transmit data via the iLink interface unit 12” is received from the command determination unit 15, it is received from the iLink input / output unit 204 connected to the iLink cable 24 to the video display device 2. A command for requesting that video data can be displayed is created and transmitted via the HDMI interface unit 11.

  The video display device 2 includes an HDMI input / output unit 201, an HDMI input / output unit 202, an HDMI input / output unit 203, an iLink input / output unit 204, an infrared light receiving unit 205, an active state determination unit 206, a display unit 207, and video data acquisition. Unit (data receiving unit) 208, tuner unit 209, and command transmitting / receiving unit (receiving device control signal receiving unit) 210.

  The HDMI input / output units 201 to 203 transmit / receive commands and data to / from other video recording / reproducing apparatuses 1, 4, and 5 connected by the HDMI cables 21 to 23.

  The iLink input / output unit 204 transmits / receives data to / from the video recording / reproducing apparatus 1 connected by the iLink cable 24.

  The command transmission / reception unit 210 receives a command received from the remote controller 3 via the infrared light receiving unit 205, based on an instruction from the active state determination unit 206, via the video input / output units 201 to 203, 4 or 5 is transmitted.

  The active state determination unit 206 determines which video input terminal is in the active state, and transmits information indicating the destination determined as the active state to the command transmission / reception unit 210. If the video data input from the iLink input / output unit 204 can be displayed on the display unit 207, it is determined that the HDMI input / output unit 203 connected to the same device as the iLink cable 24 is in the active state. .

  Here, the active state refers to a state in which the video data received from the video input terminal can be displayed on the video display device 2.

  The display unit 207 displays the video data received by the video display device 2. The display unit 207 may be realized by any display device capable of displaying information, but a specific example is a liquid crystal display device.

  The video data acquisition unit 208 acquires the video data of the television broadcast received by the tuner unit 209. Then, the acquired video data is transmitted to the display unit 207, the HDMI input / output units 201 to 203, and the iLink input / output unit 204 in accordance with a user instruction received by a user interface (not shown).

  The tuner unit 209 is a tuner unit that receives a television broadcast. Note that the television broadcast can be received from an antenna (not shown) connected to the tuner unit 209.

  Next, the flow of processing in the video reproduction system 20 according to the present embodiment will be described with reference to FIG. FIG. 4 is a flowchart showing the flow of processing when playback processing is performed in the video playback system 20.

  First, when the playback button 31 is pressed, the remote controller 3 receives a playback instruction, emits infrared light from the infrared light emitting unit 33, and transmits a “play command” (second control signal) by infrared light. The “reproduction command” is transmitted with a signal “001”.

  Next, the video display device 2 receives the “playback command” at the infrared light receiving unit 205 (S401). The video display apparatus 2 that has received the “play command” determines the transmission destination of the “play command” (S402). This is done in the same way as in the prior art. That is, it is determined whether or not the video data (TV broadcast) received from the tuner unit 209 is currently displayed on the video display device 2. If the video data received from the tuner unit 209 is not displayed, it is determined which video input terminal of the HDMI input / output units 201 to 203 is active. Then, the video input terminal in the active state is determined as the transmission destination of the “reproduction command”.

  When the video data received from the tuner unit 209 is being displayed, the video input terminal that has played most recently is determined as the transmission destination of the “play command”.

  Then, the video display device 2 transmits a “playback command” to the determined transmission destination (S403). Thereafter, the video recording / reproducing device (video recording / reproducing device 1, video recording / reproducing device 4, video recording / reproducing device 5) of the transmission destination is connected to the video display device 2 with one cable or with two cables. Depending on what is done, the process is divided.

  When a “reproduction command” command is transmitted to the video recording / reproducing apparatus 1, the video recording / reproducing apparatus 1 and the video display apparatus 2 are connected by two cables, an HDMI cable 23 and an iLink cable 24. Therefore, it progresses to S404.

  In the video recording / playback apparatus 1 that has received the “playback command”, the command determination unit 15 determines which video data is the target of the received command. This is done by referring to the most recently reproduced video data stored in the storage unit 14. Here, video data A is assumed. Then, the command determination unit 15 refers to the cable correspondence table 401 stored in the storage unit 14 and determines the transmission destination cable of the video data A (S404).

  Then, the command determination unit 15 determines that the video data A to be reproduced is data to be transmitted by iLink (YES in S405), and transmits the video data A to the data transmission / reception unit 13 and the command generation unit 16 by iLink. Tell them what to do.

  The command generation unit 16 that is informed that the video data A to be reproduced is transmitted via iLink can be received by the video display device 2 via the iLink cable 24 instead of the HDMI cable 23. ILink switching command (first control signal) is generated and transmitted to the video display device 2 via the HDMI interface unit 11 (S406).

  The video display device 2 that has received the iLink switching command enables the display unit 207 to display the video data received from the iLink input / output unit 204 connected to the iLink cable 24 (S407).

  Further, the data transmitting / receiving unit 13 that is notified that the video data A to be reproduced is transmitted by iLink, the video transmitting / receiving unit 13 transmits the video data A stored in the storage unit 14 via the iLink interface unit 12 to a video display device. 2 is transmitted while reproducing (S408). As described above, the playback video of the video data A is displayed on the display unit 207 of the video display device 2.

  On the other hand, when the video data to be reproduced is not transmitted by iLink, for example, when the data to be reproduced is video data C, the command determination unit 15 transmits the video data C to be reproduced by HDMI. (NO in S405), the data transmission / reception unit 13 and the command generation unit 16 are informed that the video data C is to be transmitted by HDMI.

  The command generation unit 16 that has been notified that the video data C to be reproduced is transmitted by HDMI, receives a maintenance command that is a command for the video display device 2 to maintain reception of the video data via the HDMI cable 23. It is generated and transmitted to the video display device 2 via the HDMI interface unit 11 (S409).

  The video display apparatus 2 that has received the maintenance command enables the display unit 207 to maintain the display of the video data received from the HDMI input / output unit 203 connected to the HDMI cable 23 (S410).

  Further, the data transmitting / receiving unit 13 that has been notified that the video data C to be reproduced is transmitted by HDMI, the video data stored in the storage unit 14 is transmitted to the video display device via the HDMI interface unit 11. 2 is transmitted while reproducing (S411). As described above, the playback video of the video data A is displayed on the display unit 207 of the video display device 2.

  On the other hand, when a “reproduction command” is transmitted to the video recording / reproducing apparatus 4 or the video recording / reproducing apparatus 5, the video recording / reproducing apparatuses 4, 5 and the video display apparatus 2 are connected by only one HDMI cable 23. Since it is, it progresses to S412.

  The video recording / playback apparatus 4 or the video recording / playback apparatus 5 that has received the “playback command” receives a maintenance command that is a command for the video display apparatus 2 to maintain the reception of the video data via the HDMI cable 21 or the HDMI cable 22. It is generated and transmitted to the video display device 2 (S412).

  The video display device 2 that has received the maintenance command enables the display unit 207 to maintain the display of the video data received from the HDMI cable 21 or the HDMI cable 22 (S413). Next, the video recording / reproducing devices 4 and 5 transmit the video data to the video display device 2 while reproducing (S414). As described above, the playback video of the video data is displayed on the display unit 207 of the video display device 2.

  This is the end of the process when the playback process is performed in the video playback system 20.

  According to the above method, the cable (iLink cable 24) different from the cable (HDMI cable 23) through which the command is transmitted / received by the command (playback command) transmitted from the video display device 2 to the video recording / playback device 1 is used. It is possible to control data (video data A) transmitted and received.

  When the video data is transmitted from the video recording / playback apparatus 1 via the iLink cable 24 and the playback video is displayed on the video display apparatus 2, the video display apparatus 2 that has received the “playback command” from the remote control 3 “ A new command different from the “reproduction command” may be created, and the new command may be transmitted to the video recording / reproducing apparatus 1 to enable display on the video display apparatus 2.

  That is, when the video display device 2 that has received the “play command” from the remote controller 3 determines that the video input terminal in the active state is the HDMI input / output unit 203, a special command that is different from the received “play command”. Is generated and transmitted to the video recording / reproducing apparatus 1.

  The video recording / playback apparatus 1 that has received the “playback command α” recognizes that the received command is a special command, creates a command for requesting switching to iLink, and transmits the command to the video display apparatus 2. The subsequent processing is the same as described above.

  Even with this method, it is possible to display the video data transmitted from the video recording / reproducing apparatus 1 to the video display apparatus 2 via the iLink cable 24 on the video display apparatus 2.

  As described above, the video recording / reproducing apparatus 1 according to the present embodiment is connected to the video display apparatus 2 with two cables (HDMI cable 23 and iLink cable 24), and displays video using the two cables. Data is transmitted to the apparatus 2 and only one of the two cables (HDMI cable 23) transmits / receives a control signal for the data, for example, a reproduction signal.

  Then, the data determined by the reproduction signal received from the video display device 2 selects the cable for transmitting the data from the two cables, and the command determination unit 15 receives the reproduction signal. When it is determined that the data is transmitted using a cable (iLink cable 24) different from the cable (HDMI cable 23), the data transmitted from a cable different from the cable that has received the reproduction signal is displayed on the video display device 2. A command generation unit 16 that transmits the iLink switching command to be transmitted using the same cable as the cable that has received the reproduction signal, and data that transmits data controlled by the reproduction signal to the cable determined to be used by the command determination unit 15 A transmission / reception unit 13.

  Thus, even when data is transmitted using a cable (iLink cable 24) different from the cable (HDMI cable 23) that has received the reproduction signal, the video display device 2 transmits the data using the iLink cable 24. Data can be received, and the received data can be displayed.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those shown in the first embodiment are given the same reference numerals, and explanation thereof is omitted.

  In the present embodiment, the video data flowing through the two cables of the HDMI cable 23 and the iLink cable 24 connecting the video recording / playback apparatus 1 and the video display apparatus 2 are displayed on the screen of the video display apparatus 2 in two screens. As a display, display is possible.

  FIG. 5 shows an example of two-screen display. FIG. 5 is a diagram illustrating an example of a two-screen display in the video display device 2 when video data is transmitted from the video recording / playback device 1 from both the HDMI cable 23 and the iLink cable 24.

  In the case of this example, the video data transmitted from the HDMI cable 23 is displayed on the entire screen (HDMI output screen 62), and the video data transmitted from the iLink cable 24 in a form overlapping with this is directed toward the screen. Are displayed in the right corner (iLink output screen 61).

  For example, the video data transmitted from the iLink cable 24 is movie content, and the video data transmitted from the HDMI cable 23 is information on the movie content (for example, a movie outline, a star name, a total time, etc.). The user can obtain various information regarding the movie while enjoying the movie content.

  Next, the flow of processing in the video reproduction system 20 when performing two-screen display will be described with reference to FIG. FIG. 6 is a flowchart showing the flow of processing in the case of performing two-screen display in the video reproduction system 20.

  First, the remote controller 3 receives a two-screen display instruction by pressing the two-screen button 32, emits infrared light from the infrared light emitting unit 33, and transmits a “two-screen display command” by infrared.

  Here, the “two-screen display command” is a command for instructing to transmit two pieces of data simultaneously.

  Next, the video display device 2 receives the “two-screen command” in the infrared light receiving unit 205 (S601). The video display device 2 that has received the “two-screen display command” changes the screen to the two-screen display shown in FIG. 6 (S602) and determines the transmission destination of the “two-screen display command” (S603). This is performed by the same method as in the first embodiment.

  When the determined transmission destination and the video display apparatus are connected by two cables (YES in S604), that is, when the transmission destination is the video recording / reproducing apparatus 1, the video recording / reproducing apparatus 1 2 screen display command "is received. Then, the command determination unit 15 determines that the command is a command for simultaneously transmitting two data, and transmits the video data specified by the “two-screen display command” from both the HDMI interface unit 11 and the iLink interface unit 12. Thus, the data transmission / reception unit 13 is instructed.

  Upon receiving the instruction from the command determination unit 15, the data transmission / reception unit 13 transmits the video data via the HDMI interface unit 11 and the iLink interface unit 12 (S605).

  Here, when the video recording / reproducing apparatus 1 is a PC (personal computer), for example, video data transmitted from the HDMI interface unit 11 and the iLink interface unit 12 is converted from the video data stored in the storage unit 14 to the iLink interface unit 12. And the PC screen in the video recording / reproducing apparatus 1 is transmitted from the HDMI interface unit 11. Not limited to this, both the HDMI interface unit 11 and the iLink interface unit 12 may transmit the video data stored in the storage unit 14.

  Note that the two data to be transmitted here may be data that can be selected by the user, or data that is selected from the most recently transmitted data out of the previously transmitted data. May be. Alternatively, two data may be transmitted from the latest date and time stored in the storage unit.

  Thereafter, when the two-screen button 32 of the remote controller 3 is pressed again (S607), a “two-screen display command” is transmitted to the video display device 2. Then, the video display device 2 that has received the “two-screen display command” displays only the video data from the iLink input / output unit 204 while making the screen one screen (S608). Then, the “2-screen display command” is transmitted to the video recording / reproducing apparatus 1 via the HDMI input / output unit 203 (S609).

  The command determination unit 15 of the video recording / reproducing apparatus 1 that has received the “two-screen display command” while transmitting video data from both the HDMI interface unit 11 and the iLink interface unit 12 performs the two-screen display state. The transmission / reception unit 13 is instructed to stop transmission of the video data transmitted through the unit 11 and transmit only the video data transmitted through the iLink interface unit 12.

  Receiving the instruction from the command determination unit 15, the data transmission / reception unit 13 stops transmission of the video data transmitted via the HDMI interface unit 11 and transmits only the video data transmitted via the iLink interface unit 12. Continue (S610).

  On the other hand, when the streaming reproduction of the video data transmitted via the iLink cable 24 is completed while the two-screen display is being performed, the data transmitting / receiving unit 13 detects the end of the streaming reproduction (S611). Then, the transmission of the video data is stopped (S612). Then, the data transmitting / receiving unit 13 notifies the command generating unit 16 that the streaming reproduction has been completed. The command generation unit 16 that has received the end of streaming playback from the data transmission / reception unit 13 displays only the video data transmitted via the HDMI cable 23 on the video display device 2 with a single display screen. A command is generated and transmitted to the video display device 2 via the HDMI interface unit 11 (S613).

  The video display device 2 that has received the command displays only the video data received from the HDMI cable 23 with a single display screen (S614).

  The video recording / playback apparatus 1 displays the video data transmitted from the HDMI interface unit 11 on the front and transmits it from the iLink interface unit 12 when generating a command for setting the display screen of the video display device 2 as one screen. A command for displaying video data on the back may be generated. In this case, the video display device 2 that has received the command sets the display screen to one screen, displays the video data received from the HDMI cable 23 on the front side, and displays the video data received from the iLink cable 24 on the rear side.

  On the other hand, when the transmission destination of the “two-screen command” is not connected to the video display device with two cables (NO in S604), the conventional two-screen display process is performed (S606). That is, the video display device 2 displays the video data received from the tuner unit 209 and the video data received from the video recording / playback device 4 or the video recording / playback device 5 on the display unit 207 in two screens.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the embodiments can be obtained by appropriately combining technical means disclosed in different embodiments. The form is also included in the technical scope of the present invention.

  Finally, each block of the video recording / reproducing apparatus 1, particularly the data transmission / reception unit 13, the command determination unit 15, and the command generation unit 16 may be configured by hardware logic, or by software using a CPU as follows. It may be realized.

  That is, the video recording / reproducing apparatus 1 includes a CPU that executes instructions of a control program that realizes each function, a ROM (read only memory) that stores the program, a RAM (random access memory) that expands the program, the program, A storage device (recording medium) such as a memory for storing various data is provided. An object of the present invention is a recording medium in which a program code (execution format program, intermediate code program, source program) of a control program of the video recording / playback apparatus 1 which is software for realizing the above-described functions is recorded in a computer-readable manner. Can also be achieved by reading the program code recorded in the recording medium and executing it by the computer (or CPU or MPU (microprocessor unit)).

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, a CD-ROM (compact disc read-only memory) / MO (magneto-optical) / Disc systems including optical disks such as MD (Mini Disc) / DVD (digital video disk) / CD-R (CD Recordable), card systems such as IC cards (including memory cards) / optical cards, or mask ROM / EPROM ( An erasable programmable read-only memory) / EEPROM (electrically erasable and programmable read-only memory) / semiconductor memory system such as a flash ROM can be used.

  Further, the video recording / reproducing apparatus 1 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN (local area network), ISDN (integrated services digital network), VAN (value-added network), CATV (community antenna television) communication. A network, a virtual private network, a telephone line network, a mobile communication network, a satellite communication network, etc. can be used. In addition, the transmission medium constituting the communication network is not particularly limited. For example, IEEE (institute of electrical and electronic engineers) 1394, USB, power line carrier, cable TV line, telephone line, ADSL (asynchronous digital subscriber loop) line Wireless such as IrDA (infrared data association) and remote control such as remote control, Bluetooth (registered trademark), 802.11 wireless, HDR (high data rate), mobile phone network, satellite line, terrestrial digital network, etc. But it is available. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  Since the video signal is connected to the video display device by two cables, and the data to the video display device flowing to the other cable can be controlled by the control signal flowing to one of them, for example, the video display device, the HDMI cable, It is suitable for a video recording / reproducing apparatus that is connected via an iLink cable, receives a control signal via an HDMI cable, and transmits video data via an iLink cable.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention, and is a block diagram illustrating a main configuration of a video recording / playback apparatus, a video display apparatus, a video playback system including a remote controller, a video recording / playback apparatus, and a video display apparatus. It is a figure which shows the command number table which shows a response | compatibility with the content of a command, and a command number in the said embodiment. It is a figure which shows the cable corresponding | compatible table which shows a response | compatibility with the content of data and the cable which should be used for transmission in the said embodiment. It is a flowchart which shows the flow of a process when the reproduction | regeneration processing is made | formed in the video reproduction system in the said embodiment. It is a figure which shows an example which is displaying 2 screens of video data from a video recording / reproducing apparatus in the video display apparatus in other embodiment of this invention. It is a flowchart which shows the flow of a process in the case of performing 2 screen display in a video reproduction system in said other embodiment. It is a figure which shows a prior art and shows a video reproduction system.

Explanation of symbols

1 Video recording and playback device (data transmission device)
2 Video display device (data receiving device)
DESCRIPTION OF SYMBOLS 3 Remote control 4 Video recording / reproducing apparatus 5 Video recording / reproducing apparatus 11 HDMI interface part 12 iLink interface part 13 Data transmission / reception part (data transmission means)
14 storage unit 15 command determination unit (communication path selection means, control signal reception means)
16 Command generator (control signal transmission means)
20 Video playback system 21 HDMI cable 22 HDMI cable 23 HDMI cable (communication path)
24 iLink cable (communication route)
201 HDMI input / output unit 202 HDMI input / output unit 203 HDMI input / output unit 204 iLink input / output unit 205 Infrared light receiving unit 206 Active state determination unit 207 Display unit 208 Video data acquisition unit (data reception unit)
209 Tuner unit 210 Command transmitting / receiving unit (receiving device control signal receiving means)

Claims (9)

A data transmission device that is connected to a data reception device through a plurality of communication paths and transmits data to the data reception device using one of the plurality of communication paths,
Control signal transmitting means for transmitting a first control signal related to the transmission of the data to the data receiving device using a communication path different from the communication path used for transmitting the data among the plurality of communication paths. A data transmission device characterized by that. A storage unit storing a table in which data to be transmitted is associated with a communication path used for transmitting the data;
Control signal receiving means for receiving from the data receiving device a second control signal for specifying the data to be transmitted;
Communication path selection means for selecting a communication path associated with the specific data specified by the second control signal with reference to the table;
Data transmission for transmitting the specific data using the selected communication path when the selected communication path selected by the communication path selection unit is different from the communication path from which the control signal receiving unit has received the second control signal. Means and
The control signal transmission means uses, as the first control signal, a control signal indicating that the specific data is transmitted using the selected communication path before the data transmission means transmits the specific data. The data transmission apparatus according to claim 1, wherein the second control signal is transmitted using the received communication path. When the second control signal is a two-data transmission signal that specifies two data to be transmitted simultaneously,
The control signal transmitting means transmits the data to the selective communication before the data transmitting means transmits data different from the communication path on which the selected communication path has received the second control signal. The data transmission according to claim 2, wherein a control signal indicating that transmission is performed using a path is transmitted as the first control signal using a communication path that has received the second control signal. apparatus.   The communication path for transmitting the first control signal by the control signal transmitting means is a communication path conforming to a high-definition multimedia interface (HDMI) standard. The data transmission device according to item. A data receiving device that is connected to a data transmission device through a plurality of communication paths and receives data from the data transmission device using one of the plurality of communication paths,
Receiving device control signal receiving means for receiving a first control signal related to reception of the data from the data transmitting device using a communication route different from the communication route used for receiving the data among the plurality of communication routes. When,
A data receiving device comprising: data receiving means for receiving the data.   A data transmission system comprising the data transmission device according to any one of claims 1 to 4 and the data reception device according to claim 5.   A data transmission device control program for operating the data transmission device according to any one of claims 1 to 4, wherein the data transmission device control program causes a computer to function as each of the above means.   A computer-readable recording medium on which the data transmission device control program according to claim 7 is recorded. A control method for a data transmission device that is connected to a data reception device through a plurality of communication paths and transmits data to the data reception device using one of the plurality of communication paths,
A control signal transmission step of transmitting a first control signal related to the transmission of the data to the data receiving apparatus using a communication path other than the communication path used for transmitting the data among the plurality of communication paths. A method for controlling a data transmitting apparatus, comprising:

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