JP5200630B2 - Video display system, content transmission device, content reproduction device, content transmission / reception device, and programs thereof - Google Patents

Description

  The present invention relates to a content transmission device and a video display system that displays video based on video data transmitted from the content transmission device.

  An audio playback system including a DVD player, which is a source device compliant with the HDMI standard, an AV amplifier, which is a repeater device, and a display device, which is a sink device, is used, and video data is output as HDMI data output from the source device. In addition, by including the audio data, both the video data and the audio data can be transmitted to the repeater device or the sink device through one HDMI cable. The AV amplifier converts the HDMI data received from the DVD player into the original video data and audio data, amplifies the audio data and outputs it to the speaker, converts the video data into HDMI data again, and transmits it to the display device. . The display device converts the received HDMI data into the original video data and displays it.

  Here, when the DVD player reproduces a music CD that does not include video data and includes only audio data, the HDMI data transmitted from the DVD player to the AV amplifier includes only audio data and does not include video data. The AV amplifier generates the original audio data from the HDMI data and outputs it to the speaker, but does not transmit the video data to the display device. As a result, no video is displayed on the display device. In such a situation, in consideration of power saving and the like, in order to change the power of the display device from the power-on state to the standby state, it is necessary to input an instruction to set the standby state by a user operation to the display device. It is complicated.

  Conversely, when a DVD player plays a DVD video disc including video data and audio data, in order to shift the power of the display device from the standby state to the power-on state in order to display the video on the display device, a user operation Therefore, it is necessary to input an instruction to turn on the power to the display device, and the operation is complicated.

  In order to solve this problem, the following Patent Document 1 describes the following technique. Type of recording medium to be reproduced in a reproducing apparatus capable of reproducing corresponding to a plurality of types of recording media including a recording medium in which video data is recorded and a recording medium in which no video data is recorded And a power-on command signal if a video display device is necessary, or a power-off command if the video display device is unnecessary A command transmission means capable of transmitting a signal is provided. By sending a power ON / OFF command from the playback device to the video display device such as the monitor device by an infrared command signal or the like by the command transmission means, the power supply operation of the monitor device can be performed from the playback device. Accordingly, the playback device automatically determines the type of disc to be played back, and automatically operates the power supply of the monitor device when the power supply operation of the monitor device is performed according to the determination of whether or not video data exists. .

  However, when the monitor device includes a plurality of connector portions to which a plurality of playback devices are connected and a selector circuit that selects a connector portion to which video data to be displayed is input from among the plurality of connector portions, the patent Document 1 has the following problems. When the monitor device displays a video based on the video data output from the first playback device selected by the selector circuit, the video data is recorded in the second playback device not selected by the selector circuit. When a CD that has not been played is played back, a power-off command is transmitted from the second playback device to the monitor device. As a result, the user turns off the monitor device even though the user is viewing and viewing the video data reproduced by the first playback device on the monitor device.

JP-A-8-87823

  The present invention has been made to solve the above-described conventional problems. The purpose of the present invention is to automatically control the display device to a standby state when reproducing content that does not include video data. An object of the present invention is to provide a video display system that prevents a problem that video data from a device cannot be displayed.

A video display system according to a preferred embodiment of the present invention includes a content transmission device and a display device that displays video based on video data transmitted from the content transmission device, and the content transmission device includes video data. A content processing unit that processes a first type of content or a second type of content that does not include video data, and the content that is processed by the content processing unit is the first type of content. Content transmitting means for transmitting video data included in the content to the display device, and whether the content processed by the content processing means is the first type content or the second type content. and type determination means for determining, transmitted from the display device -Option notification signal, or based on a hot plug signal, the selection determining means for the attached connection means determines whether the selection of the content transmission device, wherein the display device is the content transmission device by the selection determining means If it is determined that the connected connection means is selected and the content is determined to be content of the second type by the type determination means, a power off command is transmitted to the display device, The selection determining means determines that the display device is selecting a connection means to which the content transmitting apparatus is connected, and the type determining means determines that the content is the first type of content. If, it transmits a power-on command to the display device, the selection decision If the display device determines that the connection device to which the content transmission device is connected is not selected by the stage, the power is turned on regardless of whether the content is the first type or the second type. Command transmission means for transmitting neither a command nor a power-off command to the display device, the display device displaying video based on video data received from the content transmission means, and the command transmission A command receiving means for receiving the power-off command or the power-on command from a means; and when the command receiving means receives the power-off command, the command receiving means receives the power-on command. Power control means for shifting to a power-on state when A plurality of connection means to which a plurality of devices including a content transmission apparatus are connected; and a selection means for selecting a connection means for inputting video data to be displayed by the display means from the plurality of connection means.

  When the selection unit of the display device selects a connection unit other than the connection unit to which the content transmission device is connected, and the video data from a device other than the content transmission device is displayed, the content transmission device issues a power-off command. Since it is not transmitted to the display device, it is possible to prevent the display device from being put into a standby state. When the display device selection unit selects a connection unit other than the connection unit to which the content transmission device is connected, and the display device is in a standby state, the content transmission device does not transmit a power-on command to the display device. It is possible to prevent the display device from being turned on.

  When the selection unit of the display device selects the connection unit to which the content transmission device is connected, and the content type processed by the content processing unit is the second type, the content transmission device displays a power-off command. Since the data is transmitted to the device, the display device can be in a standby state. When the selection unit of the display device selects the connection unit to which the content transmission device is connected, and the content type processed by the content processing unit is the first type, the content transmission device displays a power-on command. Since the data is transmitted to the device, the display device can be turned on.

According to another preferred embodiment of the present invention, a video display system includes a content playback device, a content transmission / reception device, and a display device that displays video based on video data transmitted from the content transmission / reception device. An apparatus transmits a content reproduction unit that reproduces a first type of content including video data or a second type of content that does not include video data, and the content reproduced by the content reproduction unit to the content transmitting / receiving device. A first content transmission unit and a type notification command indicating whether the content reproduced by the content reproduction unit is the first type content or the second type content are transmitted to the content transmitting / receiving apparatus. First command transmission means for A content transmitter / receiver that receives content transmitted from the first content transmitter; first command receiver that receives the type notification command transmitted from the first command transmitter; The content of the notification of the type notification command received by the second content transmitting unit that transmits the video data included in the first type of content received by the first content receiving unit to the display device, and the type notification command received by the first command receiving unit. Type determination means for determining whether the content is the first type of content or the content of the second type, and a selection notification signal or a hot plug signal transmitted from the display device the basis, or the connected connection means of the content receiving device is selected Selection determining means or the determining, wherein the display device by selection determining means is determined to select a connection means which is connected to the content transmitting and receiving device, and the content by category judgment unit is the second When it is determined that the content is a type of content, a power-off command is transmitted to the display device, and the selection determination unit determines that the display device has selected a connection unit to which the content transmitting / receiving device is connected. When the content is determined to be content of the first type by the type determination means, a power-on command is transmitted to the display device, and the display device is connected to the content transmission / reception device by the selection determination means. It is determined that the selected connection method is not selected. And a second command transmission means for transmitting neither a power-on command nor a power-off command to the display device regardless of whether the content is the first type or the second type . The display device displays a video based on the video data received from the second content transmission unit, and receives a second command receiving the power-off command or the power-on command from the second command transmission unit. And power control means for transitioning to a standby state when the second command receiving means receives the power off command and for transitioning to a power on state when the second command receiving means receives the power on command A plurality of connection means to which a plurality of devices including the content transmission / reception apparatus are connected; From among, and a selection means for selecting a connection means for the image data to which the display means displays are input.

  In a preferred embodiment, the first command transmission unit sends the type notification command when the type of content reproduced by the content reproduction unit is changed between the first type and the second type. Transmit to the content transmitting / receiving device.

  In this case, it is possible to prevent unnecessary type notification commands from being transmitted to the display device.

  In a preferred embodiment, the display device outputs a first level hot plug signal to a device connected to the connection means selected by the selection means, and the connection means not selected by the selection means. Hot plug signal output means for outputting a second level hot plug signal to the connected device is further provided. The selection determining means determines whether the hot plug signal output from the hot plug signal output means is at the first level or the second level, thereby allowing the selection means to connect itself. It is determined whether the connected connection means is selected.

  In this case, it is only possible to determine whether the hot plug signal is at the first level, and it is possible to determine whether the connection means to which the user is connected is selected by the selection means with a very simple process. Can do.

  When the selection unit of the display device selects a connection unit other than the connection unit to which the content transmission device is connected, and the video data from a device other than the content transmission device is displayed, the content transmission device issues a power-off command. Since it is not transmitted to the display device, it is possible to prevent the display device from being put into a standby state.

  Hereinafter, a video display system including a DVD player (content reproduction device or content transmission device), an AV amplifier (content transmission / reception device or content transmission device) and a display device according to a preferred embodiment of the present invention will be specifically described with reference to the drawings. Although described, the present invention is not limited to these embodiments.

  In this example, the content is roughly classified into a first type of content including video (including images, the same applies hereinafter) data and a second type of content not including video data. As the first type of content, in addition to content recorded on video discs such as DVD video discs and Blu-ray discs, video data recorded on HDDs (hard disk drives) and digital TV broadcast data (terrestrial digital, BS digital) Etc.) and video data acquired in a streaming format via a network. In addition to content recorded on music discs such as music CDs and MDs, the second type of content includes music data recorded on HDD, digital radio broadcast data, and audio acquired in a streaming format via a network. Data etc. are mentioned. In the following, a case where the first type of content is a DVD video disc (hereinafter simply referred to as DVD) and the second type of content is a music CD (hereinafter simply referred to as CD) will be described as an example. The same applies to other cases.

  1A is a principal block diagram showing the configurations of the DVD player 10 and the AV amplifier 20, and FIG. 1B is a principal block diagram showing the configurations of the AV amplifier 20 (same as FIG. 1A) and the display device 30, respectively. The DVD player 10, the AV amplifier 20, and the display device 30 comply with the HDMI standard, for example, and are connected to each other via an HDMI cable.

[Configuration of DVD Player 10]
The DVD player 10 will be described with reference to FIG. 1A. The DVD player 10 includes a reproduction unit 11, a resolution conversion unit 12, an HDMI transmission unit 13, a system control unit 14, an operation display unit 15, a memory 16, and a connector unit 17.

  When the DVD is inserted, the playback unit 11 reads out video data recorded on the DVD, decodes it, and supplies it to the resolution conversion unit 12. Further, the playback unit 11 reads out audio data recorded on the DVD, decodes it, and supplies it to the HDMI transmission unit 13. On the other hand, when the CD is inserted, the reproducing unit 11 reads out audio data recorded on the CD, decodes it, and supplies it to the HDMI transmitting unit 13. The reproducing unit 11 includes an optical pickup, a servo circuit, an MPEG decoder, etc. (not shown).

  The resolution conversion unit 12 determines the resolution of the video data supplied from the reproduction unit 11. In addition, the resolution conversion unit 12 converts the determined resolution of the video data into a resolution set by the user by a command from the system control unit 14. The video data whose resolution has been converted by the resolution conversion unit 12 is supplied to the HDMI transmission unit 13.

  The HDMI transmission unit 13 converts the video data supplied from the resolution conversion unit 12 and / or the audio data supplied from the playback unit 11 to HDMI standard data (hereinafter referred to as HDMI data) in response to a command from the system control unit 14. ). The HDMI transmission unit 13 transmits the HDMI data to the AV amplifier 20 via the connector unit 17. Therefore, the HDMI data transmitted from the HDMI transmission unit 13 includes video data and audio data when a DVD is played back by the playback unit 11, and does not include video data when a CD is played back. Only audio data is included. Note that the fact that the HDMI data does not include video data means that the HDMI data includes no signal in the video data area.

  The HDMI transmitting unit 13 transmits and receives HDMI data via a TMDS line (normally there are a plurality of lines, but only one line is shown in FIGS. 1 and 2 for simplicity) and a hot plug line. It is connected to the HDMI receiving unit 21 of the AV receiver 20. The HDMI transmission unit 13 is connected to the HDMI reception unit 21 and the PROM 25 of the AV amplifier 20 via a DDC line for reading out EDID.

  The system control unit 14 controls the playback unit 11, the resolution conversion unit 12, the HDMI transmission unit 13, the operation display unit 15, the memory 16, and the like based on the operation program of the DVD player stored in the built-in or connected memory. For example, a microcomputer or a CPU is used. The system control unit 14 executes various processes based on an operation input from the operation display unit 15 or a control signal and data from each unit.

  The system control unit 14 is connected to the system control unit 23 of the AV amplifier 20 via the CEC line, and transmits / receives commands and / or data to / from the system control unit 23.

  The system control unit 14 determines the type of content (first type or second type) to be played back by the playback unit 14 using a known technique, and the content to be played back is the first type of content via the CEC line. Or a type notification command indicating whether the content is of the second type is transmitted to the system control unit 23 of the AV amplifier. Specifically, for example, when the system control unit 14 determines that the disc played back by the playback unit 11 has been changed from CD to DVD, the system control unit 14 notifies the system control unit 23 that the content type is DVD. On the other hand, when the system control unit 14 determines that the disc played back by the playback unit 11 has been changed from DVD to CD, the system control unit 14 notifies the system control unit 23 that the content type is CD. It is possible to determine whether or not the content type has been changed by storing the content type last notified to the system control unit 23 of the AV amplifier in a memory (not shown).

  Further, the system control unit 14 is connected to the PROM 25 of the AV amplifier 20 via the DDC line, and reads the EDID stored in the PROM 25.

[Configuration of AV amplifier]
Next, the configuration of the AV amplifier 20 will be described with reference to FIG. 1A or FIG. 1B. The AV amplifier 20 includes an HDMI receiving unit 21, an HDMI transmitting unit 22, a system control unit 23, an operation display unit 24, a memory (EDID PROM, hereinafter referred to as PROM) 25, an audio processing unit 26, and a connector. Parts 27 and 28.

  The HDMI receiving unit 21 receives the HDMI data transmitted from the DVD player 10, generates original video data (video data before HDMI conversion) from the received HDMI data, and supplies it to the HDMI transmitting unit 22. Further, the HDMI receiving unit 21 generates original audio data from the received HDMI data and supplies the original audio data to the audio processing unit 26. Note that when a CD is played back by the playback unit 11, since the HDMI data does not include video data, the original audio data is generated from the HDMI data and supplied to the audio processing unit 26. It is not supplied to the transmitter 22.

  The HDMI transmitting unit 22 converts the video data supplied from the HDMI receiving unit 21 and the audio data supplied from the audio processing unit 26 as necessary into HDMI data. The HDMI transmission unit 22 transmits the HDMI data to the display device 30 via the connector unit 28. Note that when a CD is played back by the playback unit 11, video data is not supplied from the HDMI receiving unit 21, so the HDMI transmitting unit 22 displays HDMI data including only the audio data supplied from the audio processing unit 26. Transmit to the device 30 or do not transmit HDMI data to the display device 30.

  The HDMI transmission unit 22 is connected to the HDMI reception unit 31 of the display device 30 via a TMDS line and a hot plug line. The HDMI transmission unit 22 is connected to the PROM 34 and the HDMI reception unit 31 of the display device 30 via a DDC line.

  The hot plug line is a line for outputting a hot plug signal for notifying the AV amplifier 20 from the display apparatus 30 that the display apparatus 30 is connected to the AV amplifier 20. If the hot plug signal output from the display device 30 is at a low level, the AV amplifier 20 is not active (a state in which HDMI data can be received and processed), or the display device 30 is not connected. If the hot plug signal is at a high level, it is determined that the AV amplifier 10 is connected.

  Further, as will be described later, the display device 30 outputs a high-level hot plug signal only to a device connected to the connector portion selected by the selector circuit 40 among the plurality of connector portions, and is selected. A low-bell hot plug signal is output to a device connected to a non-connector. Therefore, the system control unit 23 checks whether the hot plug signal output from the display device 30 is at a high level, so that the selector circuit 40 of the display device 30 is connected to the AV amplifier 20. Can be determined.

  The audio processing unit 26 performs processing such as signal processing, amplification processing, and D / A conversion on the audio data supplied from the HDMI receiving unit 21, and supplies the audio signal to the speaker 60 connected to the outside. . Further, the audio processing unit 26 supplies audio data to the HDMI transmission unit 22 as necessary.

  The system control unit 23 controls the HDMI reception unit 21, the HDMI transmission unit 22, the operation display unit 24, the PROM 25, the audio processing unit 26, and the like based on an AV amplifier operation program stored in a built-in or connected memory. For example, a microcomputer or a CPU is used. The system control unit 23 executes various processes based on an operation input from the operation display unit 24 or a control signal and data from each unit.

  The system control unit 23 is connected to the system control unit 14 of the DVD player 10 via the CEC line, and transmits and receives commands and data to and from the system control unit 14. The system control unit 23 is connected to the system control unit 33 of the display device 30 via the CEC line, and transmits and receives commands and data to and from the system control unit 33.

  The system control unit 23 determines the type of content to be played back by the playback unit 11 of the DVD player 10 and whether the selector circuit 40 (to be described later) of the display device 30 has selected the connector unit 38 to which the AV amplifier 20 is connected. Based on this, a power-on command or a power-off command is transmitted to the system control unit 33 of the display device 30 via the CEC line.

  Specifically, the selector circuit 40 (to be described later) of the display device 30 selects the connector unit 38 to which the AV amplifier 20 is connected, and the content type is transmitted from the system control unit 14 of the DVD player 10 via the CEC line. When receiving the type notification command indicating that is a DVD, the system control unit 23 transmits a power-on command to the system control unit 33 of the display device 30 via the CEC line. This is because the display device 30 is controlled to be in a power-on state, and video data is displayed on the display device 30.

  On the other hand, the selector circuit 40 of the display device 30 selects the connector unit 38 to which the AV amplifier 20 is connected, and the content type is CD from the system control unit 14 of the DVD player 10 via the CEC line. When receiving the notification command, the system control unit 23 transmits a power-off command to the system control unit 33 of the display device 30 via the CEC line. This is to save power by controlling the display device 30 to the standby state.

  When the selector circuit 40 of the display device 30 does not select the connector unit 38 to which the AV amplifier 20 is connected, the system control unit 23 determines whether the type notification command is DVD or CD. Neither a power-off command nor a power-on command is transmitted to the system control unit 33 of the display device 30 via the CEC line. Accordingly, when the selector circuit 40 of the display device 30 selects a portion other than the connector portion 38 to which the AV amplifier 20 is connected, and the video data from a device other than the AV amplifier 20 is displayed, the display device 30 is displayed. Can be prevented from entering the standby state. Similarly, when the selector circuit 40 of the display device 30 selects a portion other than the connector portion 38 to which the AV amplifier 20 is connected and is in a standby state, the display device 30 is turned on. Can be prevented.

  As described above, the system control unit 23 determines whether the selector circuit 40 (to be described later) of the display device 30 selects the HDMI input terminal to which the AV amplifier 20 is connected, for example, whether the hot plug is at a high level. It can be judged by judging.

[Configuration of Display Device 30]
Next, the display device 30 will be described with reference to FIG. 1B. The display device 30 includes an HDMI receiving unit 31, a display unit 32, a system control unit 33, a memory (EDID PROM, hereinafter referred to as PROM) 34, an operation unit 35, an audio processing unit 36, and a speaker 37. And a connector portion 38. As shown in detail in FIG. 2, the connector portion includes a plurality of connector portions 38, 38b, and 38c, and a plurality of devices can be connected thereto.

  The HDMI receiving unit 31 receives the HDMI data transmitted from the HDMI transmitting unit 22 of the AV amplifier 20, generates original video data from the HDMI data, and supplies the original video data to the display unit 32. In addition, the HDMI receiving unit 31 generates original audio data from the HDMI data and supplies it to the audio processing unit 36. Note that when the disc played back by the playback unit 11 is a CD, the HDMI data including the video data is not transmitted, so the video data is not supplied to the display unit 32.

  The display unit 32 is supplied with video data from the HDMI receiving unit 31 and displays video based on the video data, and is, for example, an LCD or a CRT.

  The audio processing unit 36 performs processing such as signal processing, amplification processing, and D / A conversion on the audio data supplied from the HDMI receiving unit 31 and supplies the processed audio data to the speaker 37.

  The system control unit 33 controls the HDMI receiving unit 31, the display unit 32, the PROM 34, the audio processing unit 36, and the like based on an operation program of the display device stored in a built-in or connected memory. A microcomputer or a CPU. The system control unit 33 executes various processes based on an operation input from the operation unit 35 or a control signal and data from each unit.

  When the system control unit 33 receives a power-on command from the system control unit 23 of the AV amplifier 20 via the CEC line, the system control unit 33 shifts from the standby state to the power-on state in the standby state. Further, when the system control unit 33 receives a power-off command from the system control unit 23 of the AV amplifier 20 via the CEC line, the system control unit 33 shifts from the power-on state to the standby state if the power-on state. Here, although not shown, the display device 30 includes a main power supply circuit that supplies power supply voltage to the entire display device, and a standby power supply circuit that supplies power supply voltage only to the system control unit 23 and its peripheral circuits. In the power-on state, both the main power supply circuit and the standby power supply circuit are turned on. In the standby state, the main power supply circuit is turned off and the standby power supply circuit is turned on. Therefore, in the power-on state, all functions as a display device such as display of video data by the display unit 32, reception of HDMI data by the HDMI reception unit 31, and transmission / reception of commands via the CEC line by the system control unit 33 are executed. Can do. On the other hand, in the standby state, the display unit 32 cannot display video data, but since the power supply voltage is supplied to the system control unit 33, the system control unit 33 can execute transmission / reception of commands via the CEC line. .

  Here, with reference to FIG. 2, the selector circuit 40 with which the display apparatus 30 is provided is demonstrated. In FIG. 1B, only one connector portion 38 is shown to simplify the drawing, but a plurality of connector portions 38, 38b, and 38c are actually provided as shown in FIG. For example, the AV amplifier 20 is connected to the connector portion 38 via an HDMI cable, the game machine 50 is connected to the connector portion 38b via an HDMI cable, and the set top box 60 is connected to the connector portion 38c via an HDMI cable. ing. The selector circuit 40 selects one HDMI data to be displayed from among the HDMI data supplied from each device (AV amplifier 20, game machine 50, set top box 60) connected to the connector units 38, 38b, 38c. select. That is, the selector circuit 40 selects one connector unit from the connector units 38, 38b, and 38c to which the AV amplifier 20, the game machine 50, and the set top box 60 are connected, and plays back the content displayed on the display unit 32. Is selected from the AV amplifier 20, the game machine 50, and the set top box 60. Note that the function of the selector circuit 40 may be included in the HDMI receiving unit 31.

  As described above, the display device 30 outputs a high-level hot plug signal to a device connected to the connector unit selected by the selector circuit 40, and is connected to a connector unit not selected by the selector circuit 40. A low level hot plug signal is output to the device. Alternatively, the system control unit 33 transmits a selector selection notification to the system control unit of the device connected to the connector unit selected by the selector circuit 40, and the device is connected to the connector unit not selected by the selector circuit 40. A selector release notification may be transmitted to the system control unit.

[Operation]
The operation of the present invention will be described below with reference to FIGS.
[Operation of DVD Player 10]
FIG. 3 is a flowchart showing processing of the system control unit 14 of the DVD player 10. The system control unit 14 determines whether or not the type of content played back by the playback unit 11 is changed (S1). Specifically, since the content type (CD or DVD) most recently notified to the system control unit 23 of the AV amplifier 20 is stored in a memory (not shown) in S5, the content type currently being reproduced and the memory are stored in the memory. By comparing the content type with the current content type, it can be determined whether the content type to be played back by the playback unit 11 has been changed from CD to DVD, or from DVD to CD.

  When the content type to be played back by the playback unit 11 has been changed (YES in S1), the system control unit 14 in advance so as to communicate with the system control unit 23 of the AV amplifier 20 via the CEC line. It is determined whether or not it is set by operation (S2).

  If it is not set to communicate with the system control unit 23 of the AV amplifier 20 via the CEC line (NO in S2), the process ends. On the other hand, when it is set to communicate with the system control unit 23 of the AV amplifier 20 via the CEC line (YES in S2), the system control unit 14 classifies the system control unit 23 of the AV amplifier 20 as a type. A notification command is transmitted via the CEC line (S3). More specifically, when the content type to be played back by the playback unit 11 is changed from CD to DVD, a type notification command indicating that the content type is DVD is transmitted, and the content type to be played back by the playback unit 11 is changed from DVD to CD. If the content type is changed to, a type notification command indicating that the content type is CD is transmitted.

  Subsequently, the system control unit 14 monitors whether or not an ACK command indicating that the type notification command has been received from the system control unit 23 of the AV amplifier 20 is received (S4), and the ACK command is received within a predetermined time. Is received (YES in S4), the content type notified to the AV amplifier 20 is stored in the memory (S5). On the other hand, when the ACK command is not received within the predetermined time (NO in S4), the processing is ended without saving the content type notified to the AV amplifier 20 in the memory.

[Operation of AV Amplifier 20]
FIG. 4 is a flowchart showing processing of the system control unit 23 of the AV amplifier 20. The system control unit 23 determines whether or not the selector circuit 40 of the display device 30 selects the connector unit 38 to which the AV amplifier 20 is connected (S11). For example, it is determined whether or not a hot plug signal output from the display device 30 is at a high level.

  If the selector circuit 40 has not selected the connector unit 38 to which the AV amplifier 20 is connected (NO in S11), the process is terminated, but the selector circuit 40 selects the connector unit 38 to which the AV amplifier 20 is connected. (YES in S11), the system control unit 23 in advance allows the user to communicate with the system control unit 33 of the display device 30 and the system control unit 14 of the DVD player 10 via the CEC line. It is determined whether or not it is set by operation (S12).

  If communication is not set via the CEC line between the system control unit 33 of the display device 30 and the system control unit 14 of the DVD player 10 (NO in S12), the process ends. On the other hand, when the system controller 33 of the display device 30 and the system controller 14 of the DVD player 10 are set to communicate via the CEC line (YES in S12), the system controller 23 It is determined whether a type notification command has been received from the system control unit 14 of the player 10 (S13). When the type notification command is received (YES in S13), the system control unit 23 transmits an ACK command indicating that the type notification command has been received to the system control unit 14 of the DVD player 10 via the CEC line.

  Subsequently, the system control unit 23 determines whether or not the type included in the received type notification command is the first type including video data (S14). That is, it is determined whether or not the content type played back by the playback unit 11 is DVD. If the content type is DVD (YES in S14), the system control unit 23 determines whether or not the display device 30 is in a standby state (S15). Whether the display device 30 is in a power-on state or a standby state is notified from the display device 30 via, for example, the CEC line and stored in the memory. If the display device 30 is in the power-on state (NO in S15), it is not necessary to transmit a power-on command to the display device 30, and the process is terminated. On the other hand, if the display device 30 is in the standby state (YES in S15), the system control unit 23 transmits a power-on command to the system control unit 33 of the display device 30 via the CEC line (S16). If the determination process of S15 is omitted and YES is determined in S14, a power-on command may be always transmitted. However, by executing the determination process of S15, transmission / reception of useless commands is performed. Is prevented.

  If the content type is CD in S14 (NO in S14), the system control unit 23 determines whether or not the display device 30 is in a power-on state (S17). If the display device 30 is in the standby state (NO in S17), it is not necessary to transmit a power-off command to the display device 30, and the process is terminated. On the other hand, if the display device 30 is in the power-on state (YES in S17), the system control unit 23 transmits a power-off command to the system control unit 33 of the display device 30 via the CEC line (S18). Note that the determination process of S17 may be omitted, and if it is determined NO in S14, a power-off command may always be transmitted.

[Operation of Display Device 30]
FIG. 5 is a flowchart showing processing of the system control unit 33 of the display device 30. The system control unit 33 determines whether a power-on command or a power-off command is received from the system control unit 23 of the AV amplifier 20 via the CEC line (S21). When the power-on command or the power-off command is received (YES in S21), the system control unit 33 performs a user operation in advance so as to communicate with the system control unit 23 of the AV amplifier 20 via the CEC line. It is determined whether it is set (S22).

  If it is not set to communicate with the system control unit 23 of the AV amplifier 20 via the CEC line (NO in S22), the process ends. On the other hand, when it is set to communicate with the system control unit 23 of the AV amplifier 20 via the CEC line (YES in S22), the system control unit 23 determines whether or not the received command is a power-on command. Is determined (S23).

  When the received command is a power-on command (YES in S23), the system control unit 33 determines whether or not the display device 30 is in a power-on state (S24). If the display device 30 is already in the power-on state (YES in S24), the process is terminated, but if the display device is in the standby state (NO in S24), the system control unit 33 sets the main power circuit. The display device 30 is controlled from the standby state to the power-on state. Accordingly, when content including video data is played back by the playback unit 11, the display device 30 is automatically turned on.

  On the other hand, when the received command is a power-off command (NO in S23), the system control unit 33 determines whether or not the display device 30 is in a standby state (S26). If the display device 30 is already in the standby state (YES in S26), the process is terminated. If the display device 30 is in the power-on state (NO in S26), the system control unit 33 sets the main power circuit. Is controlled to be turned off, and the display device 30 is controlled from the power-on state to the standby state. Accordingly, when content that does not include video data is played back by the playback unit 11, the display device 30 automatically enters a standby state.

  As described above, when the selector circuit 40 of the display device 30 selects a part other than the connector unit 38 to which the AV amplifier 20 is connected and displays video data from a device other than the AV amplifier 20, Since the AV amplifier 20 does not transmit a power-off command, it is possible to prevent the display device 30 from being put into a standby state. When the selector circuit 40 of the display device 30 selects a portion other than the connector 38 to which the AV amplifier 20 is connected and is in a standby state, the AV amplifier does not transmit a power-on command. It is possible to prevent the power from being turned on.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment. The method by which the AV amplifier 20 determines whether the selector circuit 40 of the display device 30 selects the connector unit 38 to which the AV amplifier 20 is connected is not limited to the above. The determination may be made based on selection information of the selector circuit 40 to which the communication line 20 is transmitted. The command may be executed not via the CEC line but via another communication line, IEEE1394, USB, or the like. Further, a device in which the DVD player 10 and the AV amplifier 20 are integrated may be employed, and this device is defined as a content transmission device. Further, the DVD player 10 may be directly connected to the display device 30, and the DVD player 10 in this case is also defined as a content transmission device. In addition, the playback processing of the playback unit 11 in the DVD player 10 and the processes of the HDMI receiving unit 21 and the HDMI transmitting unit 22 of the AV amplifier 20 are collectively defined as “process content”. Further, the program may be provided in the form of a program for causing a computer to execute the above operations of the DVD player, AV amplifier, and display device, and a recording medium on which the program is recorded. Further, a program for only a part of the operation of the AV amplifier or the display device may be provided to the AV amplifier or the display device in the form of firmware update. Furthermore, it may be provided in the form of an electronic component such as an HDMI transmission unit, an HDMI reception unit, or a system control unit in which a program for only a part of the operation of the AV amplifier or the display device is stored.

  The present invention can be suitably employed in DVD players, AV amplifiers, display devices, and the like.

1 is a block diagram showing a configuration of a DVD player 10 and an AV amplifier 20 according to a preferred embodiment of the present invention. 1 is a block diagram showing a configuration of an AV amplifier 20 and a display device according to a preferred embodiment of the present invention. 2 is a schematic block diagram illustrating a selector circuit 40. FIG. 4 is a flowchart for explaining the operation of the DVD player 10. 5 is a flowchart for explaining the operation of the AV amplifier 20. 4 is a flowchart for explaining the operation of the display device 30.

Explanation of symbols

10 DVD player 20 AV amplifier 30 Display device

Claims (7)

A content transmission device; and a display device that displays video based on video data transmitted from the content transmission device;
The content transmitting device is
A content processing means for processing a first type of content including video data or a second type of content not including video data;
Content transmitting means for transmitting video data included in the first type of content to the display device when the content processed by the content processing means is the first type of content;
Type determination means for determining whether the content processed by the content processing means is the first type of content or the second type of content;
A selection determination unit that determines whether a connection unit connected to the content transmission device is selected based on a selection notification signal or a hot plug signal transmitted from the display device ;
The selection determining means determines that the display device is selecting a connection means to which the content transmitting apparatus is connected, and the type determining means determines that the content is the content of the second type. In this case, a power-off command is transmitted to the display device, and it is determined by the selection determination means that the display device has selected a connection means to which the content transmission device is connected, and content is determined by the type determination means. Is determined to be the first type of content, a power-on command is transmitted to the display device, and the display device selects the connection means to which the content transmission device is connected by the selection determination means. If it is determined that there is no content, the content is the first type Any of the power-on command and a power-off command regardless of whether said there second type and a command transmission means that is not transmitted to the display device,
The display device is
Display means for displaying video based on video data received from the content transmission means;
Command receiving means for receiving the power off command or the power on command from the command transmitting means;
A power control unit that shifts to a standby state when the command receiving unit receives the power-off command, and that shifts to a power-on state when the command receiving unit receives the power-on command;
A plurality of connection means to which a plurality of devices including the content transmission device are connected;
A video display system comprising: a selection unit that selects a connection unit to which video data displayed by the display unit is input from the plurality of connection units. A content playback device, a content transmission / reception device, and a display device for displaying video based on video data transmitted from the content transmission / reception device,
The content reproduction apparatus is
Content reproducing means for reproducing the first type of content including video data or the second type of content including no video data;
First content transmitting means for transmitting the content reproduced by the content reproducing means to the content transmitting / receiving device;
First command transmission means for transmitting a type notification command indicating whether the content played back by the content playback means is the first type of content or the second type of content to the content transmitting / receiving apparatus; Have
The content transmitting / receiving device is
First content receiving means for receiving content transmitted from the first content transmitting means;
First command receiving means for receiving the type notification command transmitted from the first command transmitting means;
Second content transmitting means for transmitting video data included in the first type of content received by the first content receiving means to the display device;
A type determining unit that determines whether the notification content of the type notification command received by the first command receiving unit indicates the content of the first type or the content of the second type; ,
Selection determination means for determining whether or not a connection means connected to the content transmitting / receiving apparatus is selected based on a selection notification signal or a hot plug signal transmitted from the display apparatus ;
The selection determining means determines that the display device is selecting a connection means to which the content transmitting / receiving apparatus is connected, and the type determining means determines that the content is the content of the second type. In this case, a power-off command is transmitted to the display device, and it is determined by the selection determination means that the display device has selected a connection means to which the content transmitting / receiving device is connected, and the type determination means Is determined to be the first type of content, a power-on command is transmitted to the display device, and the display device selects the connection means to which the content transmitting / receiving device is connected by the selection determining means. If it is determined that the content is not Any of the power-on command and a power-off command regardless of a whether the a second type is type and a second command transmitting means not to transmit to said display device,
The display device is
Display means for displaying video based on video data received from the second content transmission means;
Second command receiving means for receiving the power off command or the power on command from the second command transmitting means;
Power control means for transitioning to a standby state when the second command receiving means receives the power off command, and for transitioning to a power on state when the second command receiving means receives the power on command;
A plurality of connection means to which a plurality of devices including the content transmitting / receiving apparatus are connected;
A video display system comprising: a selection unit that selects a connection unit to which video data displayed by the display unit is input from the plurality of connection units.   The first command transmission unit transmits the type notification command to the content transmitting / receiving apparatus when the type of content reproduced by the content reproduction unit is changed between the first type and the second type. The video display system according to claim 2. The display device outputs a first level hot plug signal to the device connected to the connection means selected by the selection means, and the device connected to the connection means not selected by the selection means. And a hot plug signal output means for outputting a second level hot plug signal.
The selection determining means determines whether the hot plug signal output from the hot plug signal output means is at the first level or the second level, thereby allowing the selection means to connect itself. The video display system according to any one of claims 1 to 3, wherein it is determined whether or not the connected connection means is selected. A content transmission device applied to the video display system according to claim 1,
A content processing means for processing a first type of content including video data or a second type of content not including video data;
Content transmitting means for transmitting video data included in the first type of content to the display device when the content processed by the content processing means is the first type of content;
Type determination means for determining whether the content processed by the content processing means is the first type of content or the second type of content;
A selection determination unit that determines whether a connection unit connected to the content transmission device is selected based on a selection notification signal or a hot plug signal transmitted from the display device ;
The selection determining means determines that the display device is selecting a connection means to which the content transmitting apparatus is connected, and the type determining means determines that the content is the content of the second type. In this case, a power-off command is transmitted to the display device, and it is determined by the selection determination means that the display device has selected a connection means to which the content transmission device is connected, and content is determined by the type determination means. Is determined to be the first type of content, a power-on command is transmitted to the display device, and the display device selects the connection means to which the content transmission device is connected by the selection determination means. If it is determined that there is no content, the content is the first type Any of the power-on command and a power-off command regardless of whether said there second type and a command transmitting means not to transmit to said display device, the content transmission device. A content transmitting / receiving apparatus applied to the video display system according to claim 2,
First content receiving means for receiving content transmitted from the first content transmitting means;
First command receiving means for receiving the type notification command transmitted from the first command transmitting means;
Second content transmitting means for transmitting video data included in the first type of content received by the first content receiving means to the display device;
A type determining unit that determines whether the notification content of the type notification command received by the first command receiving unit indicates the content of the first type or the content of the second type; ,
Selection determination means for determining whether or not a connection means connected to the content transmitting / receiving apparatus is selected based on a selection notification signal or a hot plug signal transmitted from the display apparatus ;
The selection determining means determines that the display device is selecting a connection means to which the content transmitting / receiving apparatus is connected, and the type determining means determines that the content is the content of the second type. In this case, a power-off command is transmitted to the display device, and it is determined by the selection determination means that the display device has selected a connection means to which the content transmission device is connected, and content is determined by the type determination means. Is determined to be the first type of content, a power-on command is transmitted to the display device, and the display device selects the connection means to which the content transmitting / receiving device is connected by the selection determining means. If it is determined that the content is not Any of the power-on command and a power-off command regardless of whether the said or a different second type and a second command transmitting means not to transmit to said display device, the content receiving device. A content playback device applied to the video display system according to claim 2,
Content reproducing means for reproducing the first type of content including video data or the second type of content including no video data;
First content transmitting means for transmitting the content reproduced by the content reproducing means to the content transmitting / receiving device;
First command transmission means for transmitting a type notification command indicating whether the content played back by the content playback means is the first type of content or the second type of content to the content transmitting / receiving apparatus; A content reproduction apparatus comprising:

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