JP5485952B2 - VIDEO DISPLAY SYSTEM, VIDEO DISPLAY DEVICE, ITS CONTROL METHOD, AND PROGRAM - Google Patents

Description

  The present invention relates to a video display system that performs video display and audio playback, a video display device, a control method thereof, and a program.

  For example, there is a video display device that displays video on a monitor such as a connected home television receiver and reproduces sound from a speaker. Some video display devices are portable video display devices that can be carried by the user. As an example, these video display devices read encoded video data and audio data from a computer-readable information storage medium such as a DVD or a hard disk. Based on the read data, display video data corresponding to the performance of the monitor to be displayed (display screen size, etc.) is generated, and the performance of the speaker (reproduction channels, etc.) to be played back is generated. Corresponding playback audio data is generated. The generated video data is displayed on the monitor, and the generated audio data is reproduced from the speaker.

  However, in the technology of the above-described conventional example, the video display device has its own monitor and speaker, or video data and audio data generated according to the monitor and speaker connected to itself, to these monitor and speaker. Only output. Therefore, the user can view the video data and audio data read by the video display device only with limited means.

  The present invention has been made in view of the above circumstances, and one of its purposes is to provide a video display system, a video display device, a control method thereof, and a program that allow a user to view video and audio by various means. There is.

  In order to solve the above problems, a video display system according to the present invention is a video display system including a video display device and a portable video display device that are connected to communicate with each other, and the video display device is based on the video display device. Self-device video data generating means for generating self-device video data to be displayed, self-device audio data generating means for generating self-device audio data to be played back by the video display device, and the generated A video and audio output means for displaying the video data for the own device and reproducing the generated audio data for the own device, and another device for generating the video data for the other device in a data format different from the video data for the own device Video data generating means for other devices, and voice data generating means for other devices for generating audio data for other devices in a data format different from the audio data for the own device Data transmitting means for transmitting the video data for other devices and the audio data for other devices to the portable video display device, wherein the portable video display device transmits the transmitted video data for other devices and And a data receiving means for receiving audio data for other devices; and a video and audio output means for displaying the received video data for other devices and reproducing the received audio data for other devices. To do.

  Another video display system according to the present invention is a video display system including a video display device and a portable video display device that are connected to each other for communication, and the video display device is a display target by the video display device. Self-device video data generating means for generating self-device video data, self-device audio data generating means for generating self-device audio data to be reproduced by the video display device, and the generated self-device data Video and audio output means for displaying the video data and reproducing the generated audio data for the own device, and data that can be processed by the portable video display device for the own device video data and the own device audio data Encoding means for generating video data for other devices and audio data for other devices, and encoding the video data for other devices and the audio data for other devices. Data transmitting means for transmitting to the portable video display device, the portable video display device receiving the transmitted video data for other devices and audio data for other devices, And a video and audio output means for decoding and displaying the received video data for the other device and decoding and reproducing the received audio data for the other device.

  The video display device according to the present invention is a video display device that is communicatively connected to a portable video display device, and generates video data for the device itself that is to be displayed by the video display device. Generating means; own apparatus audio data generating means for generating own apparatus audio data to be reproduced by the image display apparatus; and displaying the generated own apparatus video data and generating the generated own apparatus audio Video and audio output means for reproducing data, the video data for the own device and the audio data for the own device are encoded into a data format that can be processed by the portable video display device, and the video data for the other device and the other device Encoding means for generating audio data for data, and data transmission means for transmitting the video data for other device and the audio data for other device to the portable video display device. And wherein the Mukoto.

  In the video display device, the encoding unit converts the video data for the device itself into a size that can be displayed on the portable video display device, encodes the video data for the device that has been converted, and The video data for other devices may be generated.

  In the video display device, the encoding unit reduces the number of channels of the audio data for the own device, encodes the audio data for the own device with the reduced number of channels, and converts the audio data for the other device. It may be generated.

  In the video display device, the video data generating unit for the own device generates the video data for the own device by decoding the encoded video data stored in the storage unit, and The audio data generating unit generates the audio data for the own device by decoding the encoded audio data stored in the storage unit, and the encoding unit generates the video data for the own device or At least one of the audio data for the own device may be encoded in a data format different from the encoded video data and audio data stored in the storage unit.

  Further, in the video display device, the encoding means converts at least one of the video data for the own device or the audio data for the own device into a data format selected based on information received from the portable video display device. It is good also as encoding.

  The video display device receives a connection start request and a connection end request transmitted from the portable video display device, switches the display mode to another device display mode in response to the connection start request, and ends the connection. And further comprising display mode switching means for switching the display mode to the own apparatus display mode in response to reception of the request, wherein the own apparatus video data generating means displays the generated own apparatus video data, and the display mode is the own apparatus display mode. In the case of the other device display mode, and to the memory area different from the frame buffer in the case of the other device display mode, the own device audio data generating means generates the own device audio data. When the display mode is the self-device display mode, the sound buffer is stored in the predetermined sound buffer. And the video and audio output means read and display the video data for the own device from the frame buffer, and read and reproduce the audio data for the own device from the sound buffer, The encoding means may read and encode the video data for own device and the audio data for own device from the memory area.

  The video display device further includes information holding means that is connected to a plurality of portable video display devices and holds information for associating each of the portable video display devices with any one of a plurality of groups. The means generates a plurality of different device video data and the other device audio data different from each other according to each group, and the data transmission means is for the other device generated according to each group. The video data and the audio data for the other device may be transmitted to the portable video display device associated with each group in the held information.

  The video display device control method according to the present invention is a video display device control method connected to a portable video display device, and generates video data for the device to be displayed by the video display device. A step of generating own device audio data to be reproduced by the video display device, a step of displaying the generated own device video data and reproducing the generated own device audio data, Encoding the video data for the own device and the audio data for the own device into a data format that can be processed by the portable video display device, and generating the video data for the other device and the audio data for the other device; Transmitting video data for other devices and audio data for other devices to the portable video display device.

  Further, a program according to the present invention includes: a video display device for generating a video data for the device to be displayed by the video display device; Self-device audio data generating means for generating self-device audio data to be reproduced by the video display device, displaying the generated self-device video data on the video display means, and generating the generated self-device audio data The video and audio output means to be reproduced by the audio reproduction means, the video data for the own device and the audio data for the own device are encoded into a data format that can be processed by the portable video display device. Encoding means for generating device audio data, and transmitting the other device video data and other device audio data to the portable video display device Characterized in that to over data transmission means function as.

It is a hardware block diagram of the entertainment system which concerns on embodiment of this invention. It is a detailed block diagram of MPU. It is a hardware block diagram of the portable video display apparatus concerning embodiment of this invention. It is a functional block diagram which shows the function example of the video display system which concerns on embodiment of this invention. It is a flowchart which shows an example of the process performed by the video display system which concerns on embodiment of this invention. It is explanatory drawing which shows notionally an example of the connection between an entertainment system and a some portable video display apparatus. It is explanatory drawing which shows an example of the table which the entertainment system which concerns on embodiment of this invention hold | maintains.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The video display system according to the present embodiment includes an entertainment system 10 that functions as a video display device, and a portable video display device 50. The entertainment system 10 and the portable video display device 50 are connected to each other via a wireless communication network so that data communication is possible.

  FIG. 1 is a diagram showing a hardware configuration of the entertainment system according to the present embodiment. As shown in the figure, the entertainment system 10 includes an MPU (Micro Processing Unit) 11, a main memory 20, an image processing unit 24, a monitor 26, an input / output processing unit 28, an audio processing unit 30, and a speaker. 32, an optical disk reading unit 34, a hard disk 38, interfaces (I / F) 40 and 44, a controller 42, a camera unit 46, and a network interface 48.

  FIG. 2 is a diagram illustrating the configuration of the MPU 11. As shown in the figure, the MPU 11 includes a main processor 12, sub-processors 14a, 14b, 14c, 14d, 14e, 14f, 14g, and 14h, a bus 16, a memory controller 18, and an interface (I / F) 22. And comprising.

  The main processor 12 is an operating system stored in a ROM (Read Only Memory) (not shown), for example, a program and data read from an optical disc 36 such as a DVD (Digital Versatile Disk) -ROM, and a program supplied via a communication network. Based on the data and the like, various information processing is performed, and the sub-processors 14a to 14h are controlled.

  The sub-processors 14a to 14h perform various types of information processing in accordance with instructions from the main processor 12, and each part of the entertainment system 10 is read from the optical disk 36 such as a DVD-ROM or the like via a communication network. Control based on supplied programs and data.

  The bus 16 is used for exchanging addresses and data among the various parts of the entertainment system 10. The main processor 12, the sub processors 14a to 14h, the memory controller 18, and the interface 22 are connected to each other via the bus 16 so as to be able to exchange data.

  The memory controller 18 accesses the main memory 20 in accordance with instructions from the main processor 12 and the sub processors 14a to 14h. Programs and data read from the optical disk 36 and the hard disk 38 and programs and data supplied via the communication network are written into the main memory 20 as necessary. The main memory 20 is also used for work of the main processor 12 and the sub processors 14a to 14h.

  An image processing unit 24 and an input / output processing unit 28 are connected to the interface 22. Data exchange between the main processor 12 and the sub processors 14 a to 14 h and the image processing unit 24 or the input / output processing unit 28 is performed via the interface 22.

  The image processing unit 24 includes a GPU (Graphical Processing Unit) and a frame buffer. The GPU renders various screens in the frame buffer based on the image data supplied from the main processor 12 and the sub processors 14a to 14h. The screen formed in the frame buffer is converted into a video signal at a predetermined timing and output to the monitor 26. As the monitor 26, for example, a home television receiver is used.

  Connected to the input / output processing unit 28 are an audio processing unit 30, an optical disk reading unit 34, a hard disk 38, interfaces 40 and 44, and a network interface 48. The input / output processing unit 28 controls data exchange between the main processor 12 and the sub-processors 14a to 14h, the audio processing unit 30, the optical disc reading unit 34, the hard disk 38, the interfaces 40 and 44, and the network interface 48.

  The sound processing unit 30 includes an SPU (Sound Processing Unit) and a sound buffer. The sound buffer stores various audio data such as game music, game sound effects and messages read from the optical disk 36 and the hard disk 38. The SPU reproduces these various audio data and outputs them from the speaker 32. As the speaker 32, for example, a built-in speaker of a home television receiver is used.

  The optical disk reading unit 34 reads programs and data stored on the optical disk 36 in accordance with instructions from the main processor 12 and the sub processors 14a to 14h. Note that the entertainment system 10 may be configured to be able to read a program or data stored in a computer-readable information storage medium other than the optical disk 36.

  The optical disk 36 is a general optical disk (computer-readable information storage medium) such as a DVD-ROM. The hard disk 38 is a general hard disk device. Various programs and data are stored in the optical disk 36 and the hard disk 38 so as to be readable by a computer.

  The interfaces (I / F) 40 and 44 are interfaces for connecting various peripheral devices such as the controller 42 and the camera unit 46. For example, a USB (Universal Serial Bus) interface is used as such an interface. For example, a wireless communication interface such as a Bluetooth (registered trademark) interface may be used.

  The controller 42 is general-purpose operation input means, and is used by the user to input various operations (for example, game operations). The input / output processing unit 28 scans the state of each unit of the controller 42 every predetermined time (for example, 1/60 seconds), and supplies an operation signal representing the result to the main processor 12 and the sub processors 14a to 14h. The main processor 12 and the sub processors 14a to 14h determine the content of the operation performed by the user based on the operation signal. The entertainment system 10 is configured to be able to connect a plurality of controllers 42, and the main processor 12 and the sub processors 14a to 14h execute various processes based on operation signals input from the controllers 42. ing.

  The camera unit 46 includes, for example, a known digital camera, and inputs black and white, grayscale, or color photographed images every predetermined time (for example, 1/60 seconds). The camera unit 46 in the present embodiment is configured to input a captured image as image data in JPEG (Joint Photographic Experts Group) format. The camera unit 46 is installed on the monitor 26 with the lens facing the user, for example, and is connected to the interface 44 via a cable. The network interface 48 is connected to the input / output processing unit 28 and a communication network, and relays that the entertainment system 10 performs data communication with other entertainment systems 10 via the communication network.

  As the network interface 48, for example, a wireless communication interface such as a Bluetooth (registered trademark) interface may be used. In the present embodiment, the network interface 48 is connected to a wireless communication network, and relays data communication between the entertainment system 10 and the portable video display device 50 via this wireless communication network.

  On the other hand, the portable video display device 50 is a portable device such as a portable game machine that can be carried by a user who displays video and plays audio. In the present embodiment, as shown in FIG. 3, the portable video display device 50 includes an MPU 52, a main memory 54, an image processing unit 56, a monitor 58, an input / output processing unit 60, and an audio processing unit 62. And a speaker 64, an optical disk reading unit 66, a controller 68, and a network interface 70.

  The MPU 52 performs various information processing based on an operating system stored in a ROM (not shown), a program and data read from an optical disc such as UMD (registered trademark), a program and data supplied via a communication network, and the like. Or control each part of the portable video display device 50.

  In the main memory 54, programs and data read from the optical disc and programs and data supplied via the communication network are written as necessary. The main memory 54 is also used for work of the MPU 52.

  The image processing unit 56 includes a GPU and a frame buffer. The GPU renders various screens in the frame buffer based on the image data supplied from the MPU 52. The screen formed in the frame buffer is converted into a video signal at a predetermined timing and output to the monitor 58. The monitor 58 is, for example, a liquid crystal display device configured integrally with the portable video display device 50 main body.

  An audio processing unit 62, an optical disc reading unit 66, and a network interface (I / F) 70 are connected to the input / output processing unit 60. The input / output processing unit 60 controls data exchange between the MPU 52, the audio processing unit 62, the optical disc reading unit 66, and the network interface 70.

  The audio processing unit 62 includes an SPU and a sound buffer. The sound buffer stores various audio data such as game music, game sound effects and messages read from the optical disk. The SPU reproduces these various audio data and outputs them from the speaker 64. The speaker 64 is built in the portable video display device 50 main body.

  The optical disk reading unit 66 reads programs and data stored on the optical disk in accordance with instructions from the MPU 52. Note that the portable video display device 50 may be configured to be able to read a program or data stored in a computer-readable information storage medium other than the optical disk. Various programs and data are stored on the optical disc in a computer-readable manner.

  The controller 68 is general-purpose operation input means, and is used by the user to input various operations (for example, game operations). An operation signal representing the content of the operation performed by the user on the controller 68 is supplied to the MPU 52 by the input / output processing unit 60 at predetermined time intervals. The controller 68 includes various operation members such as various buttons attached to the casing of the portable video display device 50.

  The network interface 70 is connected to the input / output processing unit 60 and the wireless communication network, and relays data communication between the portable video display device 50 and the entertainment system 10.

  Hereinafter, functions realized by the video display system including the entertainment system 10 and the portable video display device 50 described above will be described. In the present embodiment, the entertainment system 10 generates video data for its own device to be displayed on the monitor 26 and audio data for its own device to be played back by the speaker 32, and displays video and audio based on these data. Play back. In addition, other device video data having a data format different from that of the own device video data and other device audio data having a data format different from that of the own device audio data are generated, and these data are stored in the portable video display device 50. The function to transmit to is provided. The portable video display device 50 has a function of receiving these transmitted data and displaying video on the monitor 58 and playing back sound on the speaker 64 based on the received data.

  FIG. 4 is a functional block diagram illustrating an example of functions realized by the video display system according to the present embodiment. Here, an example in which the video data for other devices and the audio data for other devices are generated based on the video data for the own device and the audio data for the own device will be described.

  As shown in FIG. 4, the entertainment system 10 functionally includes a display mode switching unit 101, a self-device video data generation unit 102, a self-device audio data generation unit 103, and a video and audio output unit 104. The other device video data generation unit 105, the other device audio data generation unit 106, and the data transmission unit 107 are configured. These functions can be realized by the MPU 11 executing a program stored in the main memory 20. This program may be provided by being stored in various computer-readable information storage media such as a CD-ROM, a DVD-ROM, and a memory card. Alternatively, it may be provided via a network such as the Internet.

  Further, as shown in FIG. 4, the portable video display device 50 functionally includes a mode switching control unit 108, a data receiving unit 109, a received video data decoding unit 110, a received audio data decoding unit 111, And a video and audio output unit 112. These functions can be realized by the MPU 52 executing a program stored in the main memory 54. This program may be provided by being stored in various computer-readable information storage media such as an optical disk and a memory card. Alternatively, it may be provided via a network such as the Internet.

  First, each function realized by the entertainment system 10 will be described.

  The display mode switching unit 101 receives the connection start request and the connection end request transmitted from the portable video display device 50, and switches the display mode according to the received request. Specifically, the display mode switching unit 101 switches the display mode to the other device display mode in response to receiving the connection start request. Further, the display mode is switched to the own device display mode in response to the reception of the connection end request. In the present embodiment, the entertainment system 10 operates in its own device display mode until there is a connection start request from the portable video display device 50.

  The own device display mode is a mode in which the video data and audio data generated by the entertainment system 10 for display and playback by the entertainment system 10 are output to the monitor 26 and the speaker 32 as they are. In the other device display mode, these video data and audio data are converted into a data format that can be processed by the portable video display device 50 and transmitted, thereby displaying video and audio by the portable video display device 50. It is a mode that enables playback of. The operation of each part described below changes according to these modes.

  The self-device video data generation unit 102 generates video data to be displayed by the monitor 26 of the entertainment system 10 (hereinafter referred to as self-device video data).

  As a specific example, the self-device video data generating unit 102 generates the self-device video data by decoding the encoded video data stored in the storage means such as the optical disk 36 or the hard disk 38. For example, the self-device video data generation unit 102 decodes encoded video data stored in the optical disc 36 or the like, and displays an image displayed on the monitor 26 at predetermined time intervals (for example, every 1/60 seconds). Then, it generates video data for the device itself. Here, the generated video data for the own device is video data having a size corresponding to the size of the image that can be displayed on the monitor 26.

  Note that the self-device video data generated by the self-device video data generation unit 102 is not limited to that obtained by decoding the encoded video data. For example, the video data for the device itself may represent a game screen generated by executing a program stored in the optical disc 36 or the like, a menu screen for content selection, or the like. In addition, the video data for the device itself may be generated based on data acquired by the entertainment system 10 via a communication network or the like. Furthermore, the video data for own device is an information presentation image that presents various information such as playback time to the user with respect to a frame image representing content such as a movie obtained by decoding the encoded video data. Alternatively, it may be video data composed of images overlaid with operation target images representing icons, menu items, and the like that are the target of user instruction operations.

  Here, the self-device video data generation unit 102 switches the output destination of the generated self-device video data in accordance with the display mode. Specifically, when the display mode is the own device display mode, the own device video data generation unit 102 outputs the generated own device video data to the frame buffer in the image processing unit 24. When the display mode is the other device display mode, the generated video data for the own device is output to the memory area M1 in the main memory 20 different from the frame buffer.

  The own device audio data generation unit 103 generates audio data to be reproduced by the speaker 32 of the entertainment system 10 (hereinafter, referred to as own device audio data). As a specific example, the audio data generating unit 103 for the own device generates the audio data for the own device by decoding the encoded audio data stored in the storage unit such as the optical disk 36 or the hard disk 38.

  Similar to the self-device video data generation unit 102, the self-device audio data generated by the self-device audio data generation unit 103 is not limited to that obtained by decoding the encoded audio data, and is an optical disc. It may be generated by executing a program stored in 36 or the like. In addition, the audio data for own device is an operation sound to be reproduced according to a user operation or the like with respect to audio data representing content such as a movie or music obtained by decoding the encoded audio data. It may be obtained by synthesizing audio signals representing various sound effects.

  Here, the audio data generating unit 103 for the own device switches the output destination of the generated audio data for the own device according to the display mode. Specifically, when the display mode is the own apparatus display mode, the own apparatus audio data generation unit 103 outputs the generated own apparatus audio data to the sound buffer in the audio processing unit 30. When the display mode is the other device display mode, the generated audio data for the own device is output to the memory area M2 in the main memory 20 different from the sound buffer. The memory area M2 may be an area different from the memory area M1 described above, or may be an area secured continuously.

  The video and audio output unit 104 displays the self-device video data generated by the self-device video data generation unit 102 and reproduces the self-device audio data generated by the self-device audio data generation unit 103. Specifically, the video and audio output unit 104 reads the video data for its own device output to the frame buffer and sequentially displays it on the screen of the monitor 26 every predetermined time. Also, the audio data for the own device output to the sound buffer is read and reproduced by the speaker 32.

  With the functions described above, the entertainment system 10 can display video based on video data and audio data stored on the optical disc 36 alone and reproduce audio when the display mode is the self-device display mode. . Thereby, the user can view content such as a movie or play a game, for example.

  When the display mode switching unit 101 switches the display mode to the other device display mode, the other device video data generating unit 105 converts the own device video data generated by the own device video data generating unit 102 into a portable type. By encoding into a data format that can be processed by the video display device 50, video data for other devices is generated.

  Specifically, the other device video data generation unit 105 reads out the frame image of each frame constituting the own device video data from the memory area M1 and encodes it into a predetermined data format to generate the other device video data. To do. For example, the video data generation unit 105 for other devices generates video data in a data format based on the MPEG-4 (Moving Picture Experts Group phase 4) standard by encoding. The other device video data generation unit 105 selects a data format to be encoded from a plurality of predetermined data format candidates based on the information transmitted from the portable video display device 50. Also good.

  Here, the video data generation unit 105 for other devices converts the video data for its own device into a size that can be displayed on the portable video display device 50 prior to the encoding process, and the video for its own device that has been converted in size. The video data for other devices may be generated by encoding the data. In this case, the size that can be displayed on the portable video display device 50 may be determined based on information stored in the entertainment system 10 in advance, or may be transmitted from the portable video display device 50. It may be determined based on the information. Thereby, even if the size of the image that can be displayed on the monitor 26 of the entertainment system 10 and the monitor 58 of the portable video display device 50 is different, the entertainment system 10 uses the video data for the device itself to carry the portable video. The video data for other devices that can be displayed on the display device 50 can be generated. As a result, the video data for the device itself originally generated for display by the monitor 26 can be converted into data in a format suitable for the encoding process.

  Further, the video data generating unit for other device 105 may perform color conversion of the video data for its own device prior to the encoding process. Specifically, for example, the other device video data generation unit 105 converts a color designated by the RGB color space in the video data for the own device into a color in the YUV color space.

  The data format of the video data for other device generated by the video data generation unit for other device 105 is stored in the optical disc 36 or the like and is encoded based on which the video data generation unit for own device 102 performs the decoding process. The video data may be in a different data format. By transmitting the video data for other devices to the portable video display device 50 as described later, the portable video display device 50 stores the data in the optical disk 36 or the like in a data format that cannot be originally displayed depending on the function of the device itself. The displayed video data can be displayed.

  When the display mode switching unit 101 switches the display mode to the other device display mode, the other device audio data generation unit 106 converts the own device audio data generated by the own device audio data generation unit 103 into a portable type. By encoding into a data format that can be processed by the audio display device 50, audio data for other devices is generated.

  Specifically, the other apparatus audio data generation unit 106 reads out the own apparatus audio data from the memory area M2, encodes it into a predetermined data format, and generates the other apparatus audio data. For example, the audio data generation unit 106 for other apparatuses generates audio data of a codec employed in standards such as MPEG-2 Part 7 and MPEG-4 Part 3 by encoding. Alternatively, audio data using a codec such as ATRAC3 (Adaptive TRansform Acoustic Coding 3) may be generated. Note that the audio data generation unit 106 for other devices is similar to the video data generation unit 105 for other devices, on the basis of information transmitted from the portable audio display device 50, and a plurality of predetermined data format candidates. The data format to be encoded may be selected from the inside.

  Here, the audio data generation unit 106 for other devices reduces the audio data for its own device to the number of channels that can be reproduced by the portable video display device 50 prior to the encoding process, and reduces the number of channels. The audio data for the other device may be generated by encoding the audio data for the other device. In this case, the number of channels that can be reproduced by the portable video display device 50 may be determined based on information stored in the entertainment system 10 in advance, or transmitted from the portable video display device 50. It may be determined based on the information obtained. Thereby, even if the number of channels of audio data that can be reproduced by the speaker 32 of the entertainment system 10 and the speaker 64 of the portable video display device 50 is different, the entertainment system 10 uses the audio data for its own device to carry it. The audio data for other devices that can be reproduced by the type video display device 50 can be generated.

  In this case, the audio data generation unit 106 for other devices deletes the audio data of one or a plurality of channels from the audio data for the own device composed of the audio data of a plurality of channels, for example. To reduce. Or it is good also as reducing the number of channels by performing the process which mixes the audio | voice data of the several channel contained in the audio | voice data for own apparatuses. For example, the other device audio data generation unit 106 converts 5.1ch or 7.1ch own device audio data into 2ch other device audio data.

  Also, the data format of the audio data for other device generated by the audio data generation unit for other device 106 is stored in the optical disc 36 or the like and decoded by the audio data generation unit for own device 103 in the same manner as the video data for other device. The encoded audio data that is the source of performing may be in a different data format. The audio data for other devices is transmitted to the portable audio display device 50 as will be described later, so that the portable audio display device 50 stores the data in the optical disk 36 or the like in a data format that cannot be originally reproduced depending on the function of the device itself. The reproduced audio data can be reproduced.

  The data transmission unit 107 transmits the connection start request to the other device video data generated by the other device video data generation unit 105 and the other device audio data generated by the other device audio data generation unit 106. Transmit to the video display device 50. The data transmission unit 107 may encrypt and transmit the video data for other devices and the audio data for other devices. Here, the encryption key used for encryption may be stored in advance in the entertainment system 10 or may be generated by a predetermined method based on information transmitted from the portable video display device 50. It may be a thing.

  In addition, the data transmission unit 107 may change the data transfer rate according to the data amounts of the video data for other devices and the audio data for other devices held in the main memory 20 in a state of waiting for transmission. . In addition to or instead of changing the data transfer rate by the data transmission unit 107, the video data generation unit for other device 105 changes the encoding bit rate of the video data for other device generated by encoding. It is good as well. That is, when the data amount of the video data for other devices and the audio data for other devices that are waiting to be transmitted has increased, the encoding bit rate of the video data for other devices has been lowered and the data amount has decreased. If so, the encoding bit rate of the video data for the other device is increased. Similarly, the audio data generation unit for other device 106 may change the coding bit rate of the audio data for other device to be generated according to the amount of data waiting for transmission. Thereby, it is possible to adjust the data amount of video data and audio data waiting for transmission according to the state of the communication network, and without occupying the bandwidth of the communication network more than necessary, the video data for other devices and The audio data for the other device can be transmitted to the portable video display device 50.

  Next, each function realized by the portable video display device 50 will be described.

  The mode switching control unit 108 switches the display mode of the portable video display device 50 in response to an instruction operation on the controller 68 by the user, and transmits a connection start request and a connection end request to the entertainment system 10. Specifically, the display mode is switched to the received data display mode in accordance with a user connection start instruction, and a connection start request is transmitted to the entertainment system 10. Further, in response to the user's connection termination instruction, the display mode is switched to the own device display mode, and a connection termination request is transmitted to the entertainment system 10. Here, the received data display mode is a mode for displaying video and reproducing audio based on video data and audio data transmitted from the entertainment system 10, and the own device display mode is the same as in the case of the entertainment system 10. In this mode, video is displayed and audio is reproduced based on the video data and audio data generated by itself.

  When the display mode is switched to the received data display mode by the mode switching control unit 108, the data receiving unit 109 transmits the video data for other devices transmitted from the data transmitting unit 107 of the entertainment system 10 that transmitted the connection start request. And audio data for other devices are received. If the data transmitted from the data transmission unit 107 is encrypted, the data reception unit 109 decrypts the encrypted data and restores the data before encryption. The decryption key used in this case may be stored in advance in the portable video display device 50, or generated by a predetermined method based on information held by the portable video display device 50. It may be.

  In the present embodiment, the video data for other devices and the audio data for other devices received by the data receiving unit 109 are stored in the memory area M3 secured in the main memory 54. Here, the memory area M3 may be a divided area for storing video data and audio data separately, or may be an area secured continuously.

  The received video data decoding unit 110 decodes the encoded video data for other device received by the data receiving unit 109. Specifically, the received video data decoding unit 110 reads the video data for the other device stored in the memory area M3, executes the decoding process, and the memory area in which the obtained video data is secured in the main memory 54 Output to M4 (output buffer area).

  The received audio data decoding unit 111 decodes the encoded audio data for other apparatus received by the data receiving unit 109. Specifically, the received audio data decoding unit 111 reads out the audio data for the other device stored in the memory area M3, executes the decoding process, and a memory area in which the obtained audio data is secured in the main memory 54 Output to M5 (output buffer area).

  The video and audio output unit 112 displays the video data decoded by the received video data decoding unit 110 and reproduces the audio data decoded by the received audio data decoding unit 111. Specifically, the video and audio output unit 112 reads the video data from the memory area M4, and outputs each frame image constituting the video data to the frame buffer in the image processing unit 56, so that the monitor 58 Display sequentially on the screen. Further, the audio data is read from the memory area M5 and output to the sound buffer in the audio processing unit 62, whereby the audio is reproduced from the speaker 64.

  Here, the video and audio output unit 112 outputs the decoded video data and audio data to the frame buffer and the sound buffer at a predetermined timing. Specifically, the video and audio output unit 112 outputs video data to the frame buffer and outputs audio data to the sound buffer at a timing when the video and audio are displayed and reproduced in synchronization. To do.

  The received video data decoding unit 110 and the received audio data decoding unit 111 decode the video data for other devices and the audio data for other devices received for each predetermined processing unit. Both the memory area M4 and the memory area M5 have a capacity capable of storing video data and audio data corresponding to a plurality of processing units. As a result, even when at least one of the received video data decoding unit 110 and the received audio data decoding unit 111 is in a state where the decoding process is not completed within a predetermined time (so-called overrun), the memory area M4 If the video data and the audio data are held in M5 and M5, the video and audio output unit 112 can continue to display the video and reproduce the audio. Further, in this case, the received video data decoding unit 110 and the received audio data decoding unit 111 change the decoding processing method according to the amount of unprocessed video data and audio data stored in the memory areas M4 and M5. It may be changed. Specifically, for example, when the decoding process by the received video data decoding unit 110 is delayed and the amount of unprocessed video data buffered in the memory area M4 is in a reduced state, the received video data decoding unit 110 Changes to a method that completes the decoding process for video data of the next processing unit earlier. Thereby, the portable video display device 50 can eliminate the delay of the decoding process while continuing the video display and the audio reproduction without interruption.

  By the functions described above, the portable video display device 50 is generated by the MPU 11 and video data and audio data read by the entertainment system 10 from the optical disc 36 or the like when the display mode is the received data display mode. Video can be displayed and audio can be reproduced based on the video data and audio data. Thereby, the user can view the video and audio distributed from the entertainment system 10 connected via the communication using the portable video display device 50.

  When the entertainment system 10 is operating in the other device display mode and the user is viewing video and audio through the portable video display device 50, the entertainment system 10 displays the current portable video display device 50 on the monitor 26. Information indicating that video and audio distribution is being executed may be displayed.

  Further, when the display mode is the self-device display mode, the portable video display device 50 uses video data that can be displayed on the monitor 58 and the speaker 64 based on data read from the optical disc by the optical disc reader 66, for example. It is assumed that reproducible audio data is generated, video is displayed on the monitor 58, and audio is reproduced by the speaker 64. Accordingly, the portable video display device 50 can output the video and audio generated by itself by switching the display mode according to the user's instruction, and can also output the video and audio distributed from the entertainment system 10. It can also be output.

  Here, an example of the flow of processing executed by the video display system according to the present embodiment will be described based on the flowchart of FIG. In the example of this figure, it is assumed that both the entertainment system 10 and the portable video display device 50 are operating in the own device display mode at the start of processing.

  In the example of FIG. 5, the portable video display device 50 first receives a connection start instruction to the user's controller 68 (S1). In response to this, the mode switching control unit 108 transmits a connection start request to the entertainment system 10 (S2), and switches the display mode of the portable video display device 50 to the received data display mode (S3).

  Further, the portable video display device 50 generates a decryption key based on its own device ID that is determined in advance (S4). Then, based on the video data for other devices and the audio data for other devices transmitted from the entertainment system 10, a received content output process for displaying video and reproducing audio is executed (S5). Specifically, the data receiving unit 109 receives the encrypted data transmitted from the entertainment system 10 and uses the decryption key generated in S4 to encrypt the video data for the other device and the audio data for the other device. To restore. Further, the received video data decoding unit 110 and the received audio data decoding unit 111 decode the encoded video data and audio data obtained by the data receiving unit 109, respectively. The video and audio output unit 112 displays the video data on the monitor 58 and reproduces the audio data through the speaker 64. This received content output process is repeated until a connection end instruction is given to the controller 68 by the user (S6).

  On the other hand, the entertainment system 10 that has received the connection start request transmitted in S2 executes the following processing. That is, first, the display mode switching unit 101 switches the display mode to the other device display mode (S7). Furthermore, the entertainment system 10 generates an encryption key for data transmission based on the device ID of the portable video display device 50 (S8). Here, it is assumed that the device ID of the portable video display device 50 is transmitted from the portable video display device 50 together with the connection start request.

  Subsequently, the entertainment system 10 generates content data for other devices and audio data for other devices in response to a request from the portable video display device 50, and executes a content distribution process to be transmitted to the portable video display device 50. (S9). Specifically, the self-device video data generation unit 105 encodes the self-device video data generated by the self-device video data generation unit 102 into the other device video data, and the self-device audio data generation unit 103 generates the data. The other device audio data generation unit 106 encodes the own device audio data into the other device audio data. Then, the data transmission unit 107 encrypts the video data for the other device and the audio data for the other device with the encryption key generated in S <b> 8 and transmits the encrypted data to the portable video display device 50. This content distribution process is repeated until a connection termination request is transmitted from the portable video display device 50 (S10).

  Here, when a connection instruction is given from the user to the controller 68 of the portable video display device 50, the portable video display device 50 transmits a connection termination request to the entertainment system 10 (S11). The display mode is switched to the own device display mode (S12). Upon receiving the connection termination request, the entertainment system 10 switches its own display mode to its own device display mode (S13). Thereby, thereafter, the entertainment system 10 and the portable video display device 50 independently display video data generated by themselves and reproduce audio data.

  Note that the portable video display device 50 according to the present embodiment has a function of transmitting, to the entertainment system 10, information (instruction operation information) indicating the content of an instruction operation performed on the controller 68 by the user when in the received data display mode. Further, it may be included. In this case, the entertainment system 10 changes the contents of the own device video data and the own device audio data in accordance with the user's instruction operation indicated by the instruction operation information received from the portable video display device 50. For example, it is assumed that the user's instruction operation indicated by the received instruction operation information is performed on the controller 42 connected to the entertainment system 10, and the video data for the own device and the own device are used according to the instruction operation. Generate audio data. In this way, with the video display system according to the present embodiment, the user can operate the character displayed on the screen of the monitor 58 by, for example, an instruction operation on the controller 68 and watch the video and audio that change as a result. it can. Thereby, the user can enjoy not only watching a content such as a movie in which video and audio are output unilaterally, but also enjoying interactive content such as a game.

  Furthermore, in this case, the size of the memory area M3 in which the video data for other devices and the audio data for other devices received by the data receiving unit 109 described above changes according to the type of content specified by the user. It is good as well. For example, when content that does not change in content is delivered by a user's instruction operation such as a movie, the size of the memory area M3 is large, so that video data to be displayed and audio data to be reproduced over a certain amount of time are temporarily stored in the memory area Even if it is held in M3, there is little inconvenience. However, in the case of a game or the like, the contents of video and audio are changed by a user's instruction operation, so the size of the memory area M3 is large, and the video data and audio data received by the portable video display device 50 are output. If a time lag occurs, the contents of the user's instruction operation are not immediately reflected in the contents, and the real-time property may be impaired. Therefore, when distributing content of a type whose contents change according to an instruction operation by the user, such a problem can be reduced by reducing the size of the memory area M3. Note that the portable video display device 50 replaces the memory area M3 with the size of the memory area for storing the video data and the audio data decoded by the received video data decoding unit 110 and the received audio data decoding unit 111 as the contents. It may be changed according to the type.

  Next, an example in which the entertainment system 10 is connected to a plurality of portable video display devices 50 will be described.

  In this case, the entertainment system 10 may transmit the video data for other devices and the audio data for other devices that are common to the plurality of portable video display devices 50 that transmitted the connection start request. Alternatively, different device video data and other device audio data may be transmitted.

  When transmitting different video data for other devices and audio data for other devices, for example, the entertainment system 10 identifies the portable video display device 50 that each portable video display device 50 transmits together with the connection start request. Information (device ID etc.) is received, and the video data for other devices and the audio data for other devices are transmitted to the transmission destination specified by the device identification information. Thereby, different video data for other devices and audio data for other devices can be transmitted to each portable video display device 50 that has transmitted the connection start request.

  In addition, the entertainment system 10 holds information that associates the plurality of portable video display devices 50 with any of the plurality of groups, and the video data for other devices that are the same as or different from each other generated according to each group. The device audio data may be transmitted to the portable video display device 50 associated with each group.

  In this case, the portable video display device 50 that has transmitted the connection start request to the entertainment system 10 further transmits information specifying the group in which the mobile video display device 50 participates to the entertainment system 10 based on the user's instruction operation or the like. To do. In response to the information, the entertainment system 10 generates information that associates the group with the portable video display device 50.

  FIG. 6 is an explanatory diagram conceptually showing an example of the connection between the entertainment system 10 and the plurality of portable video display devices 50 in this case. In the example of this figure, the entertainment system 10 manages three groups G1, G2 and G3, the portable video display devices 50a and 50b in the group G1, and the portable video display device 50c in the group G2. Holds information for associating the portable video display device 50d with the group G3. FIG. 7 is a diagram illustrating an example of a table indicating information associating such a group with the portable video display device 50.

  In the example of FIG. 6, the entertainment system 10 generates different video data for own device and audio data for own device according to each group, encodes these data, and different video data for other devices. And voice data for other devices are generated. Then, the video data for other devices and the audio data for other devices generated according to each group are transmitted to the portable video display device 50 associated with each group. As a result, the portable video display devices 50a and 50b display the same video and reproduce audio. On the other hand, each of the portable video display devices 50c and 50d displays a video different from the other portable video display devices 50 and reproduces sound. Note that the entertainment system 10 may generate and transmit the same video data for other devices and audio data for other devices to different groups according to predetermined conditions.

  Furthermore, the portable video display device 50 may transmit information for changing the group in which the user participates to the entertainment system 10 in response to a user instruction operation or the like while receiving video and audio. Good. In response to the information, the entertainment system 10 updates information associating the group as exemplified in FIG. 7 with the portable video display device 50. Thereby, the portable video display device 50 switches the content to be distributed to the content distributed to another portable video display device 50 while receiving the distribution of the content from the entertainment system 10. Can do.

  In addition, the entertainment system 10 may change the group to which each portable video display device 50 is associated based on other conditions, regardless of the information transmitted from the portable video display device 50. For example, the entertainment system 10 changes the group associated with each portable video display device 50 according to the change in the status of the communication network with each portable video display device 50 or the status of the content being generated. Do.

  According to the example described above, the user can select a content he / she wants to view from a plurality of contents distributed by the entertainment system 10 or can change the content on the way. Further, when a plurality of groups correspond to, for example, a plurality of scenes in one game, a plurality of users simultaneously participate in one game through a plurality of portable video display devices 50, and each user switches scenes. In some cases, it is possible to share one video and audio with another user, and in other cases, it is possible to view a video and audio showing a scene dedicated to the user, which is different from the other user.

  The embodiment of the present invention is not limited to the example described above. For example, the entertainment system 10 and the portable video display device 50 may be connected via various communication networks such as the Internet in addition to the wireless communication network. Further, in the above description, the video and audio output unit 104 of the entertainment system 10 is reproduced by the speaker 32, and the video and audio output unit 112 of the portable video display device 50 is reproduced by the speaker 64, respectively. Instead of this, sound may be reproduced by an earphone or the like connected to each device.

  In the example described above, the self-device video data generation unit 102 outputs the self-device video data generated according to the display mode to either the frame buffer or the memory area M1. In either display mode, the video data for the device itself may be output to the frame buffer. In this case, in the other apparatus display mode, the other apparatus video data generation unit 105 sequentially reads out the frame images constituting the own apparatus video data once output to the frame buffer, performs the encoding process, and performs the other apparatus. Video data is generated. The other device video data generation unit 105 converts the size of the image data read from the frame buffer into a size that can be displayed on the portable video display device 50 and stores it in another memory area secured on the main memory 20. The video data for the other device may be generated by performing the encoding process based on the image data output to the memory area.

  Similarly to the case of video data, the audio data generating unit for own device 103 may always output the audio data for own device to the sound buffer regardless of the display mode. In this case, the audio data generation unit 106 for other devices performs encoding processing based on the audio data for the own device read from the sound buffer, and generates audio data for other devices.

  In the example described above, the entertainment system 10 distributes video and audio to the portable video device 50 and the own device display mode in which video is displayed on the monitor 26 and audio is played back on the speaker 32. Although the processing is executed by selectively switching to the other device display mode, the entertainment system 10 may operate in other display modes. For example, it may be possible to operate in a display mode in which video display and audio playback that are common to the portable video display device 50 are performed simultaneously. Or it is good also as operating in the display mode which displays a mutually different image | video and audio | voice reproduction | regeneration at the same time by self and the portable video display apparatus 50. FIG. Further, in this case, the video data for other device and the audio data for other device transmitted to the portable video display device 50 are generated by encoding the video data for own device and the audio data for own device. Not limited to this, it may be generated by the same processing as the self-device video data generation unit 102 or the self-device audio data generation unit 103.

10 Entertainment System, 11, 52 MPU, 12 Main Processor, 14a-14h Subprocessor, 16 Bus, 18 Memory Controller, 20, 54 Main Memory, 22, 40, 44 Interface, 24, 56 Image Processing Unit, 26, 58 Monitor 28, 60 Input / output processing unit, 30, 62 Audio processing unit, 32, 64 Speaker, 34, 66 Optical disc reading unit, 36 Optical disc, 38 Hard disk, 42, 68 Controller, 46 Camera unit, 48, 70 Network interface, 50 Portable video display device, 101 Display mode switching unit, 102 Video data generation unit for own device, 103 Audio data generation unit for own device, 104, 112 Video and audio output unit, 105 Video data generation unit for other devices, 106, etc. Device audio Over data generating unit, 107 data transmission unit, 108 a mode switching control unit, 109 data receiving unit, 110 received video data decoding unit, 111 received audio data decoding unit.

Claims (8)

A video display system including a video display device and a portable video display device connected to each other for communication,
The video display device
Self-device video data generating means for generating self-device video data to be displayed by the video display device;
Own device audio data generating means for generating own device audio data to be reproduced by the video display device;
The video and audio output means for displaying the generated video data for the own device and reproducing the generated audio data for the own device;
An operation input means for receiving a user's operation input;
Video data generating means for other devices for generating video data for other devices in a data format different from the video data for the own device;
Audio data generating means for other devices for generating audio data for other devices in a data format different from the audio data for the own device;
Data transmitting means for transmitting the video data for the other device and the audio data for the other device to the portable video display device;
Including
The portable video display device includes:
Data receiving means for receiving the transmitted video data for other devices and audio data for other devices;
The video and audio output means for displaying the received video data for other device and reproducing the received audio data for other device;
Operation information transmitting means for receiving operation input of a user and transmitting operation information indicating the content of the operation input to the video display device;
Including
In the operation mode in which the video and audio output unit displays the video data for the own device and reproduces the audio data for the own device, the video display device is responsive to an operation input received by the operation input unit. The operation information transmitting means of the portable video display device operates in an operation mode in which the data transmitting means transmits the video data for other device and the audio data for other device to the portable video display device. The video display system characterized in that the operation information to be transmitted is regarded as an operation input received by the operation input means , and operates according to the operation input indicated by the operation information . A video display system including a video display device and a portable video display device connected to each other for communication,
The video display device
Self-device video data generating means for generating self-device video data to be displayed by the video display device;
Own device audio data generating means for generating own device audio data to be reproduced by the video display device;
The video and audio output means for displaying the generated video data for the own device and reproducing the generated audio data for the own device;
An operation input means for receiving a user's operation input;
Encoding means for encoding the video data for the own device and the audio data for the own device into a data format that can be processed by the portable video display device, and generating video data for the other device and audio data for the other device;
Data transmitting means for transmitting the video data for the other device and the audio data for the other device to the portable video display device;
Including
The portable video display device includes:
Data receiving means for receiving the transmitted video data for other devices and audio data for other devices;
Decoding and displaying the received video data for other device and displaying video and audio output means for decoding and reproducing the received audio data for other device;
Operation information transmitting means for receiving operation input of a user and transmitting operation information indicating the content of the operation input to the video display device;
Including
In the operation mode in which the video and audio output unit displays the video data for the own device and reproduces the audio data for the own device, the video display device is responsive to an operation input received by the operation input unit. The operation information transmitting means of the portable video display device operates in an operation mode in which the data transmitting means transmits the video data for other device and the audio data for other device to the portable video display device. The video display system characterized in that the operation information to be transmitted is regarded as an operation input received by the operation input means , and operates according to the operation input indicated by the operation information . A video display device that is communicably connected to a portable video display device,
Self-device video data generating means for generating self-device video data to be displayed by the video display device;
Own device audio data generating means for generating own device audio data to be reproduced by the video display device;
The video and audio output means for displaying the generated video data for the own device and reproducing the generated audio data for the own device;
An operation input means for receiving a user's operation input;
Encoding means for encoding the video data for the own device and the audio data for the own device into a data format that can be processed by the portable video display device, and generating video data for the other device and audio data for the other device;
Data transmitting means for transmitting the video data for the other device and the audio data for the other device to the portable video display device;
Operation information receiving means for receiving operation information indicating the content of the operation input, wherein the portable video display device receives and transmits a user operation input;
Including
In the operation mode in which the video and audio output unit displays the video data for the own device and reproduces the audio data for the own device, the video and audio output unit operates according to the operation input received by the operation input unit, and transmits the data In the operation mode in which the means transmits the video data for other devices and the audio data for other devices to the portable video display device, the operation input means transmits the operation information transmitted by the portable video display device. A video display device that is regarded as an accepted operation input and operates according to the operation input indicated by the operation information . The video display device according to claim 3, wherein the video display device is communicatively connected to a plurality of portable video display devices.
Means for receiving identification information of the portable video display device from each of the plurality of portable video display devices;
The encoding means generates a plurality of video data for other devices and audio data for other devices different from each other,
The data transmission means transmits different video data for other devices and audio data for other devices to each of the plurality of portable video display devices specified by the identification information. apparatus. The video display device according to claim 3, wherein the video display device is communicatively connected to a plurality of portable video display devices.
Means for receiving, from each of the plurality of portable video display devices, group instruction information indicating a group in which the portable video display device participates among a plurality of groups;
In accordance with the received group instruction information, related information generating means for generating related information associating each of the plurality of portable video display devices with any of the plurality of groups;
Further including
The encoding means generates a plurality of different device video data and other device audio data different from each other according to the plurality of groups,
The data transmission means sends the video data for other devices and the audio data for other devices generated according to each of the plurality of groups to the portable video display device associated with the group in the related information. A video display device characterized by transmitting. The video display device according to claim 5,
Means for receiving, from each of the plurality of portable video display devices, change information instructing a change of a group in which the portable video display device participates;
Means for updating related information generated by the information generating means in response to the received change information;
Further including
The data transmission means changes the video data for other devices and the audio data for other devices to be transmitted to the portable video display device that has transmitted the change information according to the updated related information. A video display device. A control method of a video display device connected to a portable video display device, comprising:
Generating video data for own device to be displayed by the video display device;
Generating own device audio data to be reproduced by the video display device;
Displaying the generated video data for the own device and reproducing the generated audio data for the own device;
Encoding the video data for own device and the audio data for own device into a data format that can be processed by the portable video display device, and generating video data for other device and audio data for other device;
Transmitting the video data for other devices and the audio data for other devices to the portable video display device;
Receiving the operation information indicating the content of the operation input, wherein the portable video display device receives a user's operation input and transmits it to the video display device;
The step of changing the video data for the own device and the audio data for the own device according to a user operation input, wherein the video display device itself displays the video data for the own device and the audio data for the own device. In the operation mode for reproducing the image, the video data for the own device and the audio data for the own device are changed in accordance with the operation input received by the video display device itself, and the video data for the other device and the audio data for the other device are changed. In the operation mode for transmitting the image to the portable video display device, the received operation information is regarded as the operation input received by the video display device itself , and the operation information indicated by the operation information indicates the self- operation. Changing the device video data and the device audio data;
A control method for a video display device, comprising: A video display device connected to a portable video display device by communication
Self-device video data generating means for generating self-device video data to be displayed by the video display device;
Own device audio data generating means for generating own device audio data to be reproduced by the video display device;
Video and audio output means for displaying the generated video data for own device on a video display means, and for reproducing the generated audio data for the own device on audio reproduction means,
Encoding means for encoding the video data for own device and the audio data for own device into a data format that can be processed by the portable video display device, and generating video data for other device and audio data for other device;
Data transmission means for transmitting the video data for other device and the audio data for other device to the portable video display device;
The portable video display device receives and transmits user operation input, operation information receiving means for receiving operation information indicating the content of the operation input, and
It is means for changing the video data for the own device and the audio data for the own device in response to a user operation input, wherein the video display device itself displays the video data for the own device, and the audio data for the own device. In the operation mode for reproducing the image, the video data for the own device and the audio data for the own device are changed in accordance with the operation input received by the video display device itself, and the video data for the other device and the audio data for the other device are changed. In the operation mode for transmitting the image to the portable video display device, the received operation information is regarded as the operation input received by the operation input means, and the own device is selected according to the operation input indicated by the operation information. Means for changing video data for use and audio data for own device,
A program characterized by functioning as

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