JP5149640B2 - Video display device and control method thereof, video output device and control method thereof, and video display system and control method thereof - Google Patents

Description

  The present invention relates to an apparatus, a method, and a system for displaying an image, and more particularly, an image display apparatus and a control method thereof, a video output apparatus and a control method thereof, and an image suitable for use in enlarging a display image. The present invention relates to a display system and a control method thereof.

  In recent years, resolution of video signals input to video display devices such as television receivers has been increasing. In digital terrestrial broadcasting, an image of 1920 pixels × 1080 pixels called a full high-definition image (hereinafter, full HD image) is often used. Under such circumstances, an image display device has been developed that has a display image enlargement function and can improve the visibility of a miniaturized image. When such an apparatus is used, when the user wants to watch a specific area in the video, the user can enlarge and display the video in that area, which improves convenience.

  Many television receivers include an interface (external video input terminal) to which an external video output device can be connected. A television receiver including an external video input terminal can display a video signal output from a video output device on a screen as a video other than a broadcast wave. The above-described display video enlargement function can be added to a television receiver having such an external video input terminal. In this case, the user can perform enlarged display on the video displayed by the video signal input from the external video input terminal.

  By the way, in recent years, the number of pixels of an image sensor used in a digital camera has become more than 5 million pixels. This number of pixels greatly exceeds the number of displayable pixels of a video display device such as a television receiver. Therefore, when inputting the video signal of the digital camera to the video display device via the external video input terminal, the number of pixels that can be displayed by the video display device on the digital camera side (for example, the number of pixels corresponding to full HD video) is set. The video is reduced and output. The video data reduced and output from the digital camera is stored in the memory of the video display device and used for display.

  In such a case, consider a case where the user uses the display video enlargement function described above. In this case, the video display device performs an enlarged display based on the reduced video data held by the video display device in accordance with a user operation. Therefore, the quality of the video that is enlarged and displayed on the video display device side is lower than that of the high-definition video that the digital camera originally has.

  Therefore, conventionally, there is a method in which a digital camera is provided with a zoom function for performing an enlargement process on image data obtained and the user performs a zoom operation on the digital camera to obtain a desired enlarged display. It was used. According to this method, since the video enlargement process is performed on the digital camera side, the user can view the video based on the high-definition video data owned by the digital camera on the video display device.

  Patent Document 1 discloses a form in which a video display device and a digital camera are connected by a digital data interface such as USB or IEEE1394. According to Patent Document 1, a video is transmitted from a digital camera to a video display device as video data, and a high-quality video is obtained by performing an enlargement process on the data.

As described above, when the number of pixels of the image sensor becomes 5 million pixels or more, video data to be transmitted also becomes enormous. In this case, if the video data is a still image, it can be considered that the video data is compressed and encoded by a predetermined compression encoding method such as the JPEG method.
JP 2004-163815 A

  However, the above-described method for obtaining an enlarged display using the zoom function on the digital camera side described above has the following problems. Even if the video display device has a video enlargement function, when the video data output from an external video output device that possesses high-definition video data such as a digital camera is enlarged and displayed, Therefore, it is necessary to perform an enlargement operation on the external video output device. Therefore, the user has to select an object to be operated in consideration of the output source of the currently displayed video when performing enlarged display, and the operation is complicated.

  On the other hand, according to the method disclosed in Patent Document 1, high-quality enlarged display is possible only by an operation on the video display device. However, the method of Patent Document 1 has the following problems.

  First, since a video is sent from a digital camera to a video display device as video data instead of a video signal, a function for processing this data is required on the video display device side. As an example, when video data is compressed and encoded by the JPEG method and transmitted to the video display device, a decoder for decoding the compressed code is required for the video display device. Since the processing of this decoder is complicated and time-consuming, a hardware decoder is required to realize a comfortable operation feeling, which increases the cost of the video display device. In particular, when the number of pixels of the digital camera is large, the processing load for decoding the compression code increases, and a hardware decoder is indispensable.

  Furthermore, the video display device needs to have a memory area for holding video data output from the digital camera. The size required for this memory area depends on the number of pixels of the digital camera. When handling video data of a 12-million-pixel digital camera, a memory area of about 32 megabytes may be required to develop the video data. On the other hand, if the number of video pixels that can be received by the video display device is 1920 pixels × 1080 pixels in accordance with full HD video, the memory area required for this number of pixels is about 6 megabytes. Therefore, the memory size of 32 megabytes described above also increases the cost.

  Therefore, an object of the present invention is to perform an enlarged display of video data with a simple operation without degrading the image quality, and a video display device that can be realized at low cost, a control method thereof, a video output device, and The control method, and the video display system and the control method thereof are provided.

In order to solve the above-described problems, the first invention provides a video signal input means for inputting a video signal transmitted from an external device, and a video related to the video signal input by the video signal input means on the display device. Display means for displaying, user operation accepting means for accepting a zoom operation by a user, communication means capable of communicating with an external device, and an image related to an image displayed by the display means in accordance with the zoom operation Control means for controlling the communication means to send an inquiry command for inquiring whether or not zoom processing on the signal is possible in the external apparatus to the external apparatus, and the control means zooms in the external apparatus as a result of the inquiry. If processing is possible, communicate so that a zoom request command requesting zoom processing for the video signal is sent to an external device Controls the stage, are transmitted from the external device to control the display means to display an image according to the video signal input by the video signal input means in accordance with the zoom request command, the query result, external device When the zoom process is impossible in the video display device , the video display device controls the display means so as to display the video signal after performing zoom processing on the video signal.

According to a second aspect of the present invention, there is provided a video signal input means for inputting a video signal transmitted from an external device, a display means for displaying a video related to the video signal input by the video signal input means on a display device, and a user User operation accepting means for accepting a zoom operation by means of communication, communication means capable of communicating with an external device, and in response to the zoom operation, a zoom process is requested for a video signal related to the video displayed by the display means. Control means for controlling the communication means so as to transmit a zoom request command to an external device, and the control means is a video signal transmitted from the external device in response to the zoom request command and input by the video signal input means. controlling display means to display an image according to, with respect to transmission of the zoom request command, the processing by the zoom request command from the external device fails After that the communication indicated is made with a video display device and controls the display means to display by performing zoom processing on the image signal.

According to a third aspect of the present invention, there is provided a video signal input means for inputting a video signal transmitted from an external device, a display means for displaying a video related to the video signal input by the video signal input means on the display device, and a user In order to acquire information indicating the zoom capability of the external device when the user operation accepting means for accepting the zoom operation by the communication means, the communication means capable of communicating with the external device, and the external device are connected by the communication means Control means for controlling the communication means to transmit a zoom request command to an external device based on the information indicating the zoom capability when the zoom operation is accepted by the user operation acceptance means. And the control means acquires information indicating the zoom capability of the external device when the user operation accepting means accepts the zoom operation, and If the information indicates that zoom processing according to the zoom operation is possible, an external zoom request command for requesting zoom processing for the video signal related to the video displayed by the display means is output according to the zoom operation. The display means is controlled to display the video related to the video signal transmitted from the external apparatus in response to the zoom request command and input by the video signal input means, and the user operation accepting means performs a zoom operation. Is received, if the information indicating the zoom capability of the external device is not acquired, or if the information indicates that zoom processing according to the zoom operation is impossible, the video signal The video display device is characterized in that the display means is controlled so as to perform zoom processing and display.

According to a fourth aspect of the present invention, there is provided a video signal input means for inputting a video signal transmitted from an external device, a display means for displaying a video related to the video signal input by the video signal input means on a display device, and a user And a communication means capable of communicating with an external device, wherein the transmission means is controlled by the display means in response to the zoom operation. a transmission step of zooming processing for the video signal according to the image that is to send an inquiry command to inquire whether the external device to the external device, the control means, the inquiry by transmitting step results an external device when zoom processing was possible in, to send a zoom request command for requesting a zoom process on the video signal Controls the communication means, is transmitted from the external device to control the display means to display an image according to the video signal input by the video signal input means in accordance with the zoom request command, the query result, external when zoom processing is impossible in the apparatus, the control of the image display device characterized by a step of control for controlling the display means to display by performing zooming processing to the video signal in the video display device Is the method.

According to a fifth aspect of the present invention, there is provided a video signal input means for inputting a video signal transmitted from an external device, a display means for displaying a video related to the video signal input by the video signal input means on a display device, and a user And a communication means capable of communicating with an external device, wherein the transmission means is controlled by the display means in response to the zoom operation. A transmission step for transmitting a zoom request command for requesting a zoom process for a video signal relating to a displayed video to an external device, and a control means transmitted from the external device in response to the zoom request command to input a video signal The display means is controlled to display the video related to the video signal input by the control unit, and the zoom request is sent from an external device in response to the transmission of the zoom request command. And a control step for controlling the display means so as to display the video signal after performing zoom processing on the video signal when communication indicating that the processing by the command has failed is performed. It is.

According to a sixth aspect of the present invention, there is provided a video signal input means for inputting a video signal transmitted from an external device, a display means for displaying a video related to the video signal input by the video signal input means on a display device, and a user A method for controlling a video display device comprising a user operation accepting means for accepting a zoom operation and a communication means capable of communicating with an external device, wherein the control means is connected to the external device by the communication means. Then, when the communication unit performs communication for acquiring information indicating the zoom capability of the external device with respect to the external device, and when the control unit receives the zoom operation by the user operation reception unit, If the information indicating the zoom capability of the external device is acquired and the information indicates that zoom processing according to the zoom operation is possible, the zoom operation Accordingly, a zoom request command for requesting a zoom process for the video signal related to the video displayed by the display means is transmitted to an external device, and transmitted from the external device in response to the zoom request command and transmitted by the video signal input means. When the display unit is controlled to display a video related to the input video signal and the zoom operation is received by the user operation receiving unit, information indicating the zoom capability of the external device is not acquired, or If the information indicates that zoom processing according to the zoom operation is impossible, the control means controls the display means so as to display the video signal after performing zoom processing. This is a control method of the video display device.

According to a seventh aspect of the present invention, there is provided a zoom processing unit that performs zoom processing on a video signal, a video output device that outputs a video signal, a user operation reception unit that receives a zoom operation by a user, and an input video A video display device having display means for displaying video related to the signal on the display device; video signal transmission means for transmitting the video signal output from the video output device to the video display device; a video output device; and a video display device. The video display device inquires whether or not the video output device can perform zoom processing on the video signal related to the video displayed by the display unit in response to a zoom operation. an inquiry command, and sends the video output device through the communication means, the image output device, upon receiving the inquiry command, respond to the query command The information showing whether the zoom process in the video output device Te, and transmitted to the video display device via the communication means, the image display device, receives the information showing whether the zoom process in the video output device If the information indicates that zoom processing is possible in the video output device, a zoom request command for the video signal is transmitted to the video output device via the communication means, and the video output device sends the zoom request command to the video output device. When received, the zoom processing unit performs zoom processing on the video signal in response to the zoom request command, and transmits the zoomed video signal to the video display device via the video signal transmission unit. The video display system is characterized in that the video related to the video signal subjected to zoom processing received via the video signal transmission means is displayed on the display means. It is a non.

According to an eighth aspect of the present invention, there is provided a zoom processing unit that performs zoom processing on a video signal, a video output device that outputs a video signal, a user operation reception unit that receives a zoom operation by a user, and an input video A video display device having display means for displaying video related to the signal on the display device; video signal transmission means for transmitting the video signal output from the video output device to the video display device; a video output device; and a video display device. And a communication means capable of communicating between them, and in response to a zoom operation, the video display device sends a zoom request command for requesting a zoom process for a video signal related to the video displayed by the display means to the communication means. When the video output device receives the zoom request command, the video processing device responds to the video signal by the zoom processing means in response to the zoom request command. The video signal zoom processing performs zoom processing is subjected to zoom processing on success Te, and transmitted to the video display device via the video signal transmission unit, the video display apparatus by the communication means a communication to that effect When zoom processing fails The video display device controls the display means to display the video related to the video signal that has been subjected to zoom processing in response to the zoom request command received via the video signal transmission means, and receives a zoom request. An image display system characterized by controlling the display means so as to display the image signal after performing zoom processing when communication indicating that zoom processing has failed is made by the communication means in response to command transmission. is there.

The ninth invention includes a zoom processing unit that performs zoom processing on a video signal, a video output device that outputs a video signal, a user operation reception unit that receives a zoom operation by a user, and an input video A video display device having display means for displaying video related to the signal on the display device; video signal transmission means for transmitting the video signal output from the video output device to the video display device; a video output device; and a video display device. The video display device, when the video output device is connected by the communication means, the video output device performs communication for acquiring information indicating the zoom capability of the video output device. performed for devices, video output devices, if it has a zoom capability, the information indicating the zoom capabilities in accordance with the communication, and transmitted to the image display device via the communication means When the zoom operation is accepted by the user operation accepting unit, the video display device acquires information indicating the zoom capability of the video output device, and the information can be zoomed according to the zoom operation. , A zoom request command for requesting a zoom process for the video signal related to the video displayed by the display means is transmitted to the video output device in response to a zoom operation, and is received via the video signal transmission means. In addition, the display unit is controlled to display a video related to the video signal subjected to the zoom process in response to the zoom request command, and the zoom capability of the video output device is increased when the zoom operation is received by the user operation receiving unit. If the information shown is not acquired or the information indicates that zoom processing according to the zoom operation is not possible, It is a video display system and controls the display means to display by performing zooming processing.

A tenth aspect of the invention includes a zoom processing unit that performs zoom processing on a video signal, a video output device that outputs a video signal, a user operation reception unit that receives a zoom operation by a user, and an input video A video display device having display means for displaying video related to the signal on the display device; video signal transmission means for transmitting the video signal output from the video output device to the video display device; a video output device; and a video display device. A video display control method of a video display system including communication means capable of communication between the video display device and the video display device zooms in on a video signal related to the video displayed by the display means in response to a zoom operation processing a query command to inquire whether the image output apparatus, and transmitted to the video output device through the communication means, the image output apparatus, Awa question When receiving the command, the information showing whether the zoom process in the video output device in response to the inquiry command and sends to the image display device via the communication means, the image display device, the zoom process in the video output device When receiving information indicating whether or not it is possible, if the information indicates that zoom processing is possible in the video output device, a zoom request command for the video signal is transmitted to the video output device via the communication means, When receiving the zoom request command, the video output device performs zoom processing on the video signal by the zoom processing means in accordance with the zoom request command, and sends the zoom processed video signal to the video signal via the video signal transmission means. The video display device transmits the zoomed video signal received via the video signal transmission unit to the display unit. A video display control method characterized by Shimesuru.

An eleventh aspect of the invention includes a zoom processing unit that performs zoom processing on a video signal, a video output device that outputs a video signal, a user operation reception unit that receives a zoom operation by a user, and an input video A video display device having display means for displaying video related to the signal on the display device; video signal transmission means for transmitting the video signal output from the video output device to the video display device; a video output device; and a video display device. A video display control method of a video display system including communication means capable of communication between the video display device and the video display device zooms in on a video signal related to the video displayed by the display means in response to a zoom operation a zoom request command for requesting the processing, and sends the video output device through the communication means, the image output device, upon receiving the zoom request command, the zoom demand co When a video signal subjected to zoom processing When zoom processing performs zoom processing on the video signal is successful by the zoom processing means in accordance with the command, and sends to the video display device via the video signal transmitting unit, a zoom process fails Communication indicating that is performed to the video display device by the communication means, and the video display device receives the video related to the video signal that has been zoomed in response to the zoom request command received via the video signal transmission means. The display means controls the display means to display, and when the communication indicating that the zoom process has failed is transmitted by the communication means in response to the transmission of the zoom request command, the display means performs the zoom process on the video signal and displays it. It is a video display control method characterized by controlling.

A twelfth aspect of the invention includes a zoom processing unit that performs zoom processing on a video signal, a video output device that outputs a video signal, a user operation reception unit that receives a zoom operation by a user, and an input video A video display device having display means for displaying video related to the signal on the display device; video signal transmission means for transmitting the video signal output from the video output device to the video display device; a video output device; and a video display device. A video display control method for a video display system including communication means capable of communicating between the video display device and the video display device, when the video output device is connected by the communication means, information indicating the zoom capability of the video output device If the video output device has a zoom capability, the communication means obtains the zoom capability according to the communication. , Transmitted to the image display device via the communication means, the image display device, when the zoom operation has been accepted to the user operation receiving unit, information indicating the zoom capability of the video output device are acquired, and If the information indicates that zoom processing according to the zoom operation is possible, a zoom request command for requesting zoom processing for the video signal related to the video displayed by the display means is displayed according to the zoom operation. User operation accepting means for controlling the display means to display the video related to the video signal that is transmitted to the output device and received via the video signal transmitting means and subjected to zoom processing in accordance with the zoom request command. When the zoom operation is accepted, information indicating the zoom capability of the video output device has not been acquired, or the information is zoomed according to the zoom operation. If shows that management is not possible, an image display control method characterized by controlling the display means to display by performing zoom processing on the image signal.

  With such a configuration, according to the present invention, enlargement display of video data can be performed with a simple operation without lowering the image quality, and can be realized at low cost.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 schematically shows a configuration of an example of a display system applicable to the present invention. The video display device 100 and the video output device 200 are connected by a cable 300. In the present invention, when the video signal sent from the video output device 200 to the video display device 100 via the cable 300 is enlarged and displayed according to an operation on the video display device 100, the video output device 200 is provided if possible. The zoom function is used.

  This will be described more specifically. It is assumed that the video signal (video data) output from the video output device 200 and supplied via the cable 300 is displayed on the video display device 100. When the user performs an operation for enlarging the display video on the video display device 100, a predetermined exchange is performed between the video display device 100 and the video output device 200 via the cable 300 in accordance with the operation. The output device 200 is requested to zoom the video data. In accordance with this zoom request, the video output device 200 performs zoom processing on the video data held by the video output device 200 if possible. The zoomed video data is transmitted to the video display device 100 via the cable 300. The video display device 100 displays video based on video data transmitted from the video output device 200 via the cable 300.

  By performing the video display control in this manner, an enlarged video can be obtained by operating the video display device 100, so that the user does not need to be aware of the output source of the video data and can be easily operated. The enlarged video displayed on the video display device 100 is generated directly from the high-resolution original video data in the video output device 200. For this reason, it is possible to extremely reduce the deterioration in image quality in the enlarged image.

  If zoom processing is not possible on the video output device 200 side in response to a zoom request from the video display device 100, the fact is notified to the video display device 100. When the video display device 100 is notified that zoom processing is impossible on the video output device 200 side, the video display device 100 performs zoom processing of the video signal using the zoom function of the video display device 100.

  As a zoom process in the video output device 200, the following method is conceivable. As an example, when video data is displayed on the video display device 100 having a display resolution with a smaller number of pixels than the video signal, a signal in a display area set according to the zoom rate for the video data is displayed as a video. It is conceivable to do this by displaying on the device 100.

  When a display area having the same number of pixels as the display resolution is set for the video data, a zoom rate with the best resolution can be obtained. On the other hand, when the entire video data is set as the display area, the zoom factor is 1.0. In this case, based on the pixels of the original digital video data, pixels are generated according to the zoom rate using linear interpolation as necessary, and the number of pixels in the display area is displayed on the display of the video display device 100. It is conceivable to match the number of pixels according to the resolution. The same applies to a zoom ratio between the maximum zoom ratio and the minimum zoom ratio.

  As described above, in the present invention, the enlargement process of the video data supplied from the video output device 200 via the cable 300 is performed using the zoom function of the video output device 200. Therefore, the video display system to which the present invention is applied needs to include hardware such as a memory and a decoder that decodes a compression code in accordance with the resolution of video data that can be processed by the video output device 200 in the video display device 100. No.

  The first embodiment of the present invention will be described in more detail with reference to the drawings. FIG. 2 shows an example of the configuration of a video display device 100 applicable to the present invention. The video display device 100 is, for example, a television receiver capable of receiving a television broadcast, and includes a display panel 110 having a display area of 1920 pixels × 1080 pixels capable of displaying a full HD video. The received television broadcast video is displayed on the display panel 110. The video display apparatus 100 includes one or more external video input terminals, and can display a video signal supplied from the outside on the display panel 110. Further, the video display device 100 can be remotely operated by a remote control commander (not shown) (hereinafter abbreviated as a remote controller).

  In the video display device 100, a CPU 101, a ROM 102, a RAM 103, and an IR controller 111 are connected to a system bus 112. To the system bus 112, a decoder 105, an HDMI transceiver 106, an analog I / F 107, a video processor 108, and a display controller 109 are further connected.

  A CPU 101 serving as a control unit operates in accordance with a program stored in a ROM 102 and / or a RAM 103, which will be described later, and controls the entire video display apparatus 100. The ROM 102 is a non-volatile memory in which a program for operating the CPU 101 and fixed data are stored. When the power of the video display device 100 is turned on, the CPU 101 reads a program from the ROM 102 and starts controlling the video display device 100 according to the read program.

  The RAM 103 is a volatile memory for temporarily storing data. The RAM 103 is used as a working memory in which a program executed by the CPU 101 stores data. The RAM 103 is also used as a video memory for storing intermediate processing data and processed data generated in accordance with video data processing in the video processor 108. The video memory may be provided separately from the RAM 103.

  A tuner 104 is connected to the decoder 105. The tuner 104 selects and demodulates a signal in a specific frequency band from an RF signal received by an antenna (not shown), and further converts the signal into a signal that can be processed by the CPU 101. For example, if the selected signal is a signal based on terrestrial digital broadcasting, the tuner 104 restores MPEG2-TS data from this signal. The restored MPEG-TS data is supplied to the decoder 105.

  The decoder 105 acquires compression-coded video data and audio data from the MPEG2-TS data supplied from the system bus 112. The video data is compressed and encoded in the MPEG2 format, and the audio data is compressed and encoded in the AAC format. The decoder 105 decodes the compression code of each data. The decoded video data and audio data are supplied to the RAM 103 via the system bus 112 and stored in a buffer area provided in the RAM 103.

  The HDMI transceiver 106 serving as a video signal input unit and a communication unit can be connected to the cable 300 and performs processing of a signal conforming to HDMI (hereinafter referred to as an HDMI signal) transmitted / received via the cable 300. HDMI is a standard defined so that high-resolution digital video signals such as full HD can be transferred without compression. The HDMI transceiver 106 demodulates the HDMI signal input via the cable 300 and extracts digital video data. The extracted video data is supplied to the RAM 103 via the system bus 112 and stored in a buffer area provided in the RAM 103.

  Also, HDMI can send and receive commands called CEC. CEC is an abbreviation for Consumer Electronics Control. The CEC command is transmitted / received based on control from the CPU 101. In the CEC command, a command Vender Specific Commands that can define a manufacturer-specific command is defined. It is conceivable to use this command Vender Specific Commands as a CEC command used in the present invention.

  The HDMI signal can include digital audio data and other control commands in addition to the above-described digital video data and CEC command. However, these are not related to the present invention, and thus description thereof is omitted.

  The analog video I / F 107 processes a video signal input in an analog format such as a composite video signal, a component video signal, and a video signal input from the D terminal. The analog video I / F 107 processes the received analog video signal based on a predetermined clock, and converts the analog video signal into digital video data by A / D conversion. Video data output from the analog video I / F 107 is supplied to the RAM 103 via the system bus 112 and stored in a buffer area provided in the RAM 103.

  The video processor 108 as another zoom processing means has a command set suitable for video processing such as SIMD arithmetic processing commands, for example, and processes video data in accordance with commands from the CPU 101. The video processor 108 can perform video processing such as enlargement / reduction, video data overlay, and color conversion on video data stored in a buffer area in the RAM 103 in substantially real time.

  The video data processed by the video processor 108 is supplied to the display controller 109 via the system bus 112. Not limited to this, the digital video data processed by the video processor 108 may be stored in the RAM 103.

  Here, the video processor 108 is described as if it were independent hardware, but this is not limited to this example. The video processor 108 may be integrated in the CPU 101.

  The display controller 109 converts the digital video data processed by the video processor 108 into a format that can be displayed by the display panel 110. The signal output from the display controller 109 is supplied to the display panel 110 and visualized. As the display panel 110, a liquid crystal panel or a plasma display panel can be applied. The display controller 109 and the display panel 110 correspond to display means.

  The IR controller 111 has a light receiving element that receives an infrared signal transmitted from a remote controller, which will be described later, and a decoder that decodes the received infrared signal to obtain a remote control command. The acquired remote control command is passed to the CPU 101 via the system bus 112. The CPU 101 controls the operation of each part of the video display device 100 based on this remote control command. The IR controller 111 and the remote controller correspond to user operation accepting means.

  FIG. 3 schematically shows an appearance of an example of a remote controller 400 for remotely operating the video display device 100. The remote control 400 is provided with a plurality of buttons as shown. The remote controller 400 generates a remote control command corresponding to the button operated by the user, modulates the remote control command into an infrared signal, and transmits the infrared signal. Hereinafter, only buttons that are deeply related to the present invention will be described.

  The input switching button 401 is a button for switching the input path of the video signal input to the video display device 100. In the example of FIG. 3, every time the input switching button 401 is pressed, the input path of the video signal to be displayed on the video display device 100 is sequentially switched. For example, every time the input switching button 401 is pressed, the input source of the video signal to be displayed is sequentially and cyclically switched from terrestrial digital broadcast → HDMI input → component input → composite input → terrestrial digital broadcast.

  When digital terrestrial broadcasting is selected as the input source, video based on the video data output from the decoder 105 is displayed on the video display device 100. When the HDMI input is selected as the input source, the video display device 100 displays video based on video data based on the HDMI signal supplied via the cable 300 and received by the HDMI transceiver 106. When component input, composite input, or D terminal input is selected as the input source, the video display apparatus 100 displays video based on the video data supplied from the outside and output from the analog video I / F 107. Is done.

  In FIG. 3, a button group that can specify four directions is arranged under a button group that includes four buttons including the input switching button 401, and a channel designation button group is arranged therebelow. A channel number increase / decrease button group and a volume adjustment button group are arranged below the channel designation button group.

  In FIG. 3, a zoom-in button 402 and a zoom-out button 403 for requesting zoom-in and zoom-out of the display image are arranged below the channel increase / decrease button group and the volume adjustment button group. When the zoom-in button 402 is pressed, the video display device 100 is requested to enlarge and display the video being displayed. When the zoom-out button 403 is pressed, the video display device 100 is requested to reduce the displayed video.

  FIG. 4 schematically illustrates an exemplary configuration of the video output device 200. Here, it is assumed that the video output device 200 is a digital camera and can process video data with a resolution higher than the resolution that the video display device 100 can display. As an example, it is assumed that the video output device 200 includes an image sensor having approximately 16 million effective pixels, and video data captured by the image sensor has a resolution of 4992 pixels × 3328 pixels.

  In FIG. 4, an imaging unit 202, a CPU 203, a ROM 204, and a RAM 205 are connected to a system bus 201. An HDMI transceiver 206, a graphic processor 207, and a flash memory 208 are further connected to the system bus 201. The flash memory 208 is a non-volatile memory that can be attached to and detached from the video output device 200 and that can rewrite data.

  The CPU 203 operates according to a program stored in a ROM 204 and / or RAM 205 described later, and controls the entire video output apparatus 200. The ROM 204 is a non-volatile memory in which a program for operating the CPU 203 and fixed data are stored. When the power of the video output device 200 is turned on, the CPU 203 reads a program from the ROM 204 and starts controlling the video output device 200 according to the read program.

  Further, the CPU 203 constructs a file system for managing files stored in a flash memory 208 described later according to the program read from the ROM 204.

  The RAM 205 is a volatile memory for temporarily storing data. The RAM 205 is used as a working memory in which data executed by a program executed by the CPU 203 is stored. The RAM 205 is also used as a graphics memory for storing intermediate processing data and processed data of video data generated in accordance with video data processing in the graphic processor 207. The graphics memory may be provided separately from the RAM 205.

  The imaging unit 202 includes an optical system, an imaging element, and a signal processing unit. The optical system includes a lens, a focus mechanism, a diaphragm mechanism, and the like. A CCD, a CMOS imager, or the like can be applied to the image sensor, and converts light incident through the optical system into an electrical signal. A signal output from the image sensor is processed in a predetermined manner by a signal processing unit and converted into digital video data. This video data is temporarily stored in the RAM 205 via the system bus 201.

  A graphic processor 207 as a zoom processing unit uses the RAM 205 as a work memory, and performs predetermined video processing on the digital video data in accordance with an instruction from the CPU 203.

  The graphic processor 207 performs compression encoding processing on the digital video data output from the imaging unit 202 and stored in the RAM 205 to generate compressed video data. The JPEG method can be applied as a compression encoding method for digital video data. The generated compressed video data is stored by the CPU 203 in a file having a predetermined file name based on the file system, and stored in the flash memory 208 as a compressed video data file.

  Further, the graphic processor 207 can decode the compression code of the compressed video data stored in the compressed video data file read from the flash memory 208. The decoded video data obtained by decoding the compression code is stored in the RAM 205.

  Further, the graphic processor 207 can perform an enlargement process on the digital video data stored in the RAM 205. As already described, this enlargement processing is performed when the video data is displayed on the first display area having a display resolution with a smaller number of pixels than that of the video data. Data in the second display area set accordingly is extracted. Then, processing is performed so that the number of pixels of the extracted video data matches the number of pixels in the first display area to be displayed. For example, as described above, based on the pixels of the original video data, pixels are generated according to the zoom rate using linear interpolation or the like as necessary. The video data subjected to the enlargement process is stored in the RAM 205.

  The HDMI transceiver 206 serving as a video signal output unit (or video signal transmission unit) and a communication unit is connected to the cable 300 and processes an HDMI signal transmitted / received via the cable 300. The HDMI transceiver 206 maps the digital video data according to the HDMI format, modulates the digital video data in a predetermined manner, and transmits it to the outside via the cable 300. The HDMI transceiver 206 also performs processing of CEC commands transmitted / received by the HDMI signal. The HDMI transceiver 206 demodulates the received HDMI signal and extracts a CEC command. The extracted CEC command is passed to the CPU 203 via the system bus 201. Also, the HDMI transceiver 206 maps and transmits the CEC command passed from the CPU 203 according to the HDMI format.

  Next, processing according to the first embodiment of the present invention will be described. FIG. 5 is a flowchart showing an example of processing on the video display device 100 side when the zoom-in button 402 or the zoom-out button 403 is pressed. Each determination and control process performed in the flowchart of FIG. 5 is performed by the CPU 101 according to a program. FIG. 6 is a flowchart showing an example of processing on the video output device 200 side according to the processing shown in FIG. Each determination and control process performed in the flowchart of FIG. 6 is performed by the CPU 203 according to a program.

  Referring to FIG. 5, in video display device 100, pressing of zoom-in button 402 or zoom-out button 403 of remote controller 400 is detected (step S401). When it is detected that the zoom-in button 402 or the zoom-out button 403 has been pressed by the user, the process proceeds to step S402, and the video display device 100 checks the input source of the video signal currently displayed. Here, the input source of the video signal represents an input path selected by the input switching button 401 of the remote controller 400.

  If it is determined in step S402 that the input source of the video signal is other than HDMI input, the process proceeds to step S403. The processing from step S403 to step S408 is a series of processing when zoom processing is performed on video data on the video display device 100 side. In step S403, the CPU 101 acquires the current zoom factor. In the next step S404, the CPU 101 calculates a new zoom factor corresponding to the button detected to be pressed in step S401 described above. Based on the calculation result, the CPU 101 determines whether zoom processing is possible (step S405).

  FIG. 7 shows an example zoom rate that the video display apparatus 100 can handle. According to FIG. 7, the video display apparatus 100 can set the zoom rate stepwise from the minimum zoom rate of 1.0 times to the maximum zoom rate of 4.0 times. For example, when the zoom-in button 402 is pressed when the current zoom ratio is 1.5, the new zoom ratio is 2.0. If the zoom-in button 402 is pressed when the current zoom factor is 4.0, the zoom factor does not change because the zoom factor has already reached the upper limit. In this case, zooming is impossible.

  Similarly, when the zoom-out button 403 is pressed when the current zoom ratio is 4.0 times, the new zoom ratio becomes 3.0 times. If the zoom-out button 403 is pressed when the current zoom ratio is 1.0, the zoom ratio does not change because the lower limit of the zoom ratio has already been reached. In this case, zooming is impossible.

  If it is determined in step S405 described above that zoom processing is possible, the process proceeds to step S406. In step S406, the CPU 101 sets the zoom factor calculated in step S404 in the video processor 108. The video processor 108 performs enlargement or reduction processing on the input video data according to the set zoom rate. The video data enlarged or reduced by the video processor 108 is supplied to the display controller 109. The display controller 109 updates the screen displayed on the display panel 110 with the supplied video data (step S407).

  Here, the video data used for display in step S407 is obtained by zooming a video signal corresponding to full HD by the video processor 108. In order to perform zoom processing on video data having full HD resolution, in the case of zoom-in, that is, enlargement processing, the resolution of the video displayed in step S407 is lower than the original video data.

  FIG. 8 schematically shows a display example when zoom display (enlarged display) is performed in accordance with the processing of steps S403 to S407 described above. As described above, when video data enlargement processing is performed in the video display device 100, a small area in the screen corresponding to the zoom rate is extended and displayed over the entire screen. For this reason, the video itself is enlarged and displayed, but the resolution is lowered.

  If it is determined in step S402 described above that the input source of the video signal is HDMI input, the process proceeds to step S409. Steps S409 to S413 are a series of processes when the HDMI input is selected as the input source of the video signal to the video display device 100. In this case, the video display device 100 performs zoom processing of video data in the video output device 200 connected to the video display device 100 via the cable 300 in cooperation with the video output device 200.

  The following description will be made with reference to both the flowchart of FIG. 5 and the flowchart of FIG. 6 showing processing on the video output device 200 side. Prior to the description, it is assumed that video data to be displayed is selected in advance by the CPU 203 on the video output device 200 side. It is assumed that the video data is reduced in advance to a resolution corresponding to the video display device 100 and transmitted to the video display device 100 as an HDMI signal.

  As an example, the CPU 203 is a file for causing the video display device 100 to display a compressed video data file stored in the flash memory 208 based on a user operation on an operation unit (not shown) included in the video output device 200 or a control signal from the outside. Select. The selected file is read from the flash memory 208 and stored in the RAM 205. The graphic processor 207 extracts compressed video data from the compressed video data file stored in the RAM 205 and decodes the compressed code in accordance with a command from the CPU 203. The video data obtained by decoding the compression code is stored in the RAM 205.

  Returning to FIG. 5, in step S409, the CPU 101 issues a command for confirming whether or not the zoom operation instructed by the button detected to be pressed in step S401 described above is possible. Issue as a command. This CEC command is supplied to the HDMI transceiver 106 and transmitted to the video output device 200 via the cable 300.

  Referring to FIG. 6, the video output device 200 receives the CEC command sent from the video display device 100 in step S409 described above by the HDMI transceiver 206 (step S501). The received CEC command is passed to the CPU 203. In response to the CEC command, the CPU 203 determines whether zoom processing can be performed on the video data stored in the RAM 205. Then, information indicating the determination result is transmitted as a CEC command from the HDMI transceiver 206 to the video display device 100 via the cable 300 (step S502).

  Referring to FIG. 5, the CEC command transmitted from the video output device 200 in step S <b> 502 is received by the HDMI transceiver 106 of the video display device 100 and passed to the CPU 101. Based on the CEC command, the CPU 101 determines whether or not video data can be zoomed in the video output device 200 (step S410). If it is determined that the zoom process is not possible, the process proceeds to step S403, the zoom process is performed in the video display device 100 according to the process of steps S403 to S408 described above, and finally the display panel 110 is displayed. Is displayed.

  As an example of a case where zoom processing of video data is not possible in the video output device 200, a case where a zoom-in instruction is given to video data that has been enlarged at the maximum zoom rate is conceivable. Similarly, zoom processing is also disabled when a zoom-out instruction is given to video data that has been reduced at the minimum zoom rate. Also, when the video output device 200 does not have a zoom function, zoom processing is disabled.

  Even when the video output device 200 does not support the CEC command for confirming whether or not the zoom operation is possible, the zoom process is disabled. In this case, the process shown in the flowchart of FIG. 6 is not executed. The video display apparatus 100 may determine whether zoom processing is possible based on whether a reply to the CEC command times out.

  On the other hand, if it is determined in step S410 described above that the video output device 200 can perform zoom processing of the video data, the process proceeds to step S411. In step S411, the CPU 101 calculates a new zoom rate according to the zoom operation designated by the user, that is, detected in step S401 described above. Then, the information on the new zoom ratio is transmitted from the HDMI transceiver 106 using the HDMI CEC command together with the zoom request command for requesting the zoom. This CEC command is sent to the video output device 200 via the cable 300 and received by the HDMI transceiver 206.

  Referring to FIG. 6, when receiving the CEC command transmitted from video display device 100 in step S411 (step S503), video output device 200 shifts the processing to the next step S504. In the next step S504, zoom processing of the video data is performed according to the received CEC command.

  In step S504, the CPU 203 controls the graphic processor 207 based on the CEC command received in step S503, and performs zoom processing on the video data stored in the RAM 205 according to the instructed zoom rate. In this case, as described above, the zoom process is performed so that the resolution of the processed video data matches the resolution of the image frame to be displayed.

  The zoomed video data is stored in the RAM 205. This video data is read from the RAM 205 by the CPU 203 and supplied to the HDMI transceiver 206. The HDMI transceiver 206 maps the supplied video data according to the HDMI format into an HDMI signal, and transmits the HDMI signal to the video display device 100 via the cable 300 (step S505).

  If it is determined in step S410 in FIG. 5 that zoom processing is not possible, the CEC command is not transmitted in step S411. Therefore, in step S503 in FIG. 6, if a CEC command is not sent from the video display device 100 even after a predetermined time has elapsed from step S502, it is conceivable that a series of processing is terminated as a timeout.

  Referring to FIG. 5, in the video display device 100, the HDMI transceiver 106 receives the HDMI signal transmitted from the video output device 200 via the cable 300 (step S412). The received HDMI signal is demodulated by the HDMI transceiver 106 and video data is extracted. This video data is supplied to the display controller 109. The display controller 109 updates the screen displayed on the display panel 110 with the supplied video data (step S413).

  Here, since the video signal received by the video display device 100 in step S412 is a signal obtained by zooming the video data owned by the video output device 200 by the video output device 200, the image quality is higher than that of the image displayed in step S407. It is expected that As an example, when the video output device 200 holds video data of approximately 16 million pixels (horizontal 4992 pixels × vertical 3328 pixels), the zoom rate is approximately 3.0 times (3.0≈3329 pixels / 1080 pixels). ), A video signal with little or no resolution degradation is received.

  FIG. 9 schematically shows a display example when zoom display (enlarged display) is performed according to steps S409 to S413 of FIG. 5 and the processing of FIG. Video data having a resolution higher than the resolution that the video display apparatus 100 can support, which the video output apparatus 200 has, is enlarged on the video output apparatus 200 side. Therefore, in the video display device 100 described with reference to FIG. 8, a display with extremely little deterioration in resolution can be obtained as compared with the case where the small area in the screen corresponding to the zoom rate is extended to the entire screen and enlarged. Can do.

  Further, the present invention is useful not only for enlargement processing but also for reduction processing as zoom processing. The reduction process is performed by, for example, enlarging a display area set for video data with resolution on the video output device 200 side in accordance with the zoom rate. Therefore, when the reduction processing is to be performed on the video display device 100 side, the video display device 100 needs to include a memory having a capacity capable of holding video data with a resolution corresponding to the video output device 200. By performing the reduction process on the video output device 200 side, the video display device 100 only needs to have a memory having a capacity capable of processing video data having a resolution corresponding to the video display device 100, for example, a resolution corresponding to a full HD video. . Therefore, if the reduction process is performed on the video output device 200 side, the capacity of the memory that the video display device 100 should have can be reduced as compared with the case where the reduction process is performed by the video display device 100.

  As described above, according to the first embodiment of the present invention, there is provided a video display system that can easily operate an externally input video and can perform zoom display without degrading the image quality. Can be provided at a cost.

  In the above description, the video output device 200 has been described as having previously selected video data to be displayed on the video display device 100. However, the video data is selected from the video display device 100 side. Is also possible.

  As an example, the video display device 100 requests the video output device 200 for a list of compressed video data files stored in the flash memory 208. In response to this request, a GUI for selecting a desired file is configured based on the list data transmitted from the video output device 200, and a GUI screen is displayed. The user uses the GUI to select data to be displayed on the video display device 100 using the four-way button of the remote control 400. The selected file information is transmitted to the video output device 200, and the video output device 200 reads the compressed video data file from the flash memory 208 based on the received file information.

  In addition, when the displayed video data is enlarged and displayed by zooming in, it is preferable that an area to be enlarged can be designated. As an example, the video display apparatus 100 causes the display panel 110 to display a cursor that can be moved on the screen by a four-direction button provided on the remote controller 400. The user moves the cursor to the vicinity of the center of the area to be enlarged and presses the zoom-in button 402. Information indicating the cursor position is transmitted from the video display device 100 to the video output device 200 together with a zoom request. The video output device 200 determines an area to be enlarged based on the zoom request and the cursor position information.

  Next, a second embodiment of the present invention will be described using the flowcharts of FIGS. In the second embodiment, a process for confirming whether zoom processing is possible is omitted from the process according to the first embodiment described with reference to FIGS. 5 and 6. In the second embodiment, since the configurations of the video display device 100 and the video output device 200 described above can be applied as they are, the description thereof is omitted.

  FIG. 10 is a flowchart showing an example of processing on the video display device 100 side according to the second embodiment when the zoom-in button 402 or the zoom-out button 403 is pressed. Each determination and control process performed in the flowchart of FIG. 10 is performed by the CPU 101 according to a program. FIG. 11 is a flowchart illustrating an example of processing on the video output device 200 side according to the processing illustrated in FIG. 10. Each determination and control process performed in the flowchart of FIG. 11 is performed by the CPU 203 according to a program.

  In FIG. 10, the processes in steps S801 to S808 are the same as the processes in steps S401 to S408 described with reference to FIG. 5, and thus detailed description thereof is omitted to avoid complexity.

  In the video display device 100, pressing of the zoom-in button 402 or the zoom-out button 403 of the remote control 400 is detected (step S801). If it is detected that the zoom-in button 402 or the zoom-out button 403 has been pressed by the user, the process proceeds to step S802.

  If it is determined in step S802 that the input source of the video signal is HDMI input, the process proceeds to step S809. Steps S809 to S812 are a series of processes when the HDMI input is selected as the input source of the video signal to the video display device 100. In this case, the video display device 100 performs zoom processing of video data in the video output device 200 connected to the video display device 100 via the cable 300 in cooperation with the video output device 200.

  The following description will be made with reference to both the flowchart of FIG. 10 and the flowchart of FIG. 11 showing the processing on the video output device 200 side. As described above, on the video output device 200 side, video data to be displayed is selected in advance, reduced to a resolution corresponding to the video display device 100, and transmitted to the video display device 100 as an HDMI signal. .

  In step S809, the CPU 101 transmits the zoom operation instruction designated by the user, that is, detected in step S801 described above, from the HDMI transceiver 106 using the HDMI CEC command. The zoom request CEC command is sent to the video output device 200 via the cable 300 and received by the HDMI transceiver 206.

  Referring to FIG. 11, the video output device 200 receives the CEC command sent from the video display device 100 in step S809 described above by the HDMI transceiver 206 (step S601). The received CEC command is passed to the CPU 203. In accordance with this CEC command, the CPU 203 determines whether zoom processing of the video data stored in the RAM 205 is possible (step S602). If it is determined that zoom processing is possible, the CPU 203 controls the graphic processor 207 based on the zoom request and performs zoom processing of the video data (step S603). Then, the CPU 203 transmits information indicating that the zoom request is successful to the video display device 100 as a CEC command (step S604).

  The video data zoomed in step S603 is stored in the RAM 205. This video data is read from the RAM 205 by the CPU 203 and supplied to the HDMI transceiver 206. The HDMI transceiver 206 maps the supplied video data according to the HDMI format into an HDMI signal, and transmits the HDMI signal to the video display device 100 via the cable 300 (step S605).

  Referring to FIG. 10, in video display device 100, the HDMI signal sent from video output device 200 is received by HDMI transceiver 106 (step S811), demodulated by HDMI transceiver 106, and video data is extracted. This video data is supplied to the display controller 109. The display controller 109 updates the screen displayed on the display panel 110 with the supplied video data (step S812).

  If it is determined in step S602 in FIG. 11 that the CPU 203 cannot execute the zoom process, the process proceeds to step S606. In step S606, information indicating that the zoom request has failed is transmitted from the video output device 200 to the video display device 100 as a CEC command. Referring to FIG. 10, on the video display device 100 side, when it is determined that the CEC command transmitted from the video output device 200 indicates a zoom request failure (step S810), the process proceeds to step S803. Thereafter, zoom processing of the video data is performed in the video display device 100 in accordance with the processing in steps S803 to S808.

  As described above, similarly to the first embodiment described above, according to the second embodiment of the present invention, an image input from the outside can be easily operated and displayed in a zoomed manner without degrading the image quality. An image display system that can be used can be provided at low cost.

  Next, a third embodiment of the present invention will be described. In the third embodiment, when the video output device 200 and the video display device 100 are connected by the cable 300 with respect to the processing according to the first embodiment described with reference to FIGS. The display device 100 acquires the zoom capability of the video output device 200. In the third embodiment, the configurations of the video display device 100 and the video output device 200 described above can be applied as they are, and the description thereof is omitted.

  FIG. 12 is a flowchart illustrating an example of processing in the video display device 100 when the video output device 200 is connected to the video display device 100. First, in step S901, the video display apparatus 100 determines whether the video output apparatus 200 is connected by HDMI. The video display apparatus 100 can detect the connection of the video output apparatus 200 by using an authentication protocol based on HDCP specified by HDMI, for example. When connection of the video output device 200 is detected, the process proceeds to step S902.

  In step S902, the video display apparatus 100 transmits a predetermined command to the video output apparatus 200, and tries to acquire information indicating the zoom capability of the connected video output apparatus 200. For example, the video display device 100 provides the video output device 200 with information on the zoom rate of the video data currently output by the video output device 200 and a list of zoom rates that the video output device 200 can execute. Request using a CEC command or the like.

  In the next step S903, the video display apparatus 100 determines whether or not the command transmitted to the video output apparatus 200 in step S902 is successful. If it is determined that the process has failed, the series of processes is terminated. If the video output device 200 does not have a zoom function or does not support the command transmitted in step S902, the command fails.

  On the other hand, if it is determined that the command transmitted in step S902 is successful, the process proceeds to step S904. That is, when the command transmitted in step S902 is successful, information indicating the zoom rate of the currently output video data from the video output device 200 to the video display device 100 and the video output device 200 execute the command. A list of possible zoom rates is sent. In step S <b> 904, the video display device 100 stores the information acquired by the command transmitted in step S <b> 902 in the RAM 103 as zoom capability information of the video output device 200.

  FIG. 13 shows an example of zoom capability information stored in the RAM 103 in step S904. FIG. 13A shows an example of information indicating the zoom rate currently being output by the video output device 200. FIG. 13B shows an example of a list of zoom rates that can be executed by the video output device 200. As a result, the video display apparatus 100 is outputting video data at a current zoom ratio of 1.0, and the video output apparatus 200 corresponds to zoom ratios of 1.0, 2.0, and 3.0. You can know that you are.

  FIG. 14 is a flowchart illustrating an example of processing on the video display device 100 side according to the third embodiment when the zoom-in button 402 or the zoom-out button 403 is pressed. In FIG. 14, the processes in steps S1101 to S1108 are the same as the processes in steps S401 to S408 described with reference to FIG. 5, and thus detailed description thereof is omitted to avoid complexity.

  In the video display device 100, pressing of the zoom-in button 402 or the zoom-out button 403 of the remote control 400 is detected (step S1101). If it is detected that the zoom-in button 402 or the zoom-out button 403 has been pressed by the user, the process proceeds to step S1102.

  If it is determined in step S1102 that the input source of the video signal is HDMI input, the process proceeds to step S1109. Steps S <b> 1109 to S <b> 1113 are a series of processes when the HDMI input is selected as the input source of the video signal to the video display device 100.

  In step S <b> 1109, the video display apparatus 100 determines whether or not zoom capability information of the connected video output apparatus 200 is stored in the RAM 103.

  That is, according to the third embodiment, as described with reference to the flowchart of FIG. 12, when the video output device 200 is connected to the video display device 100, the video display device 100 executes the video output device 200. Attempts have been made to acquire zoom capability information. When the video display device 100 has successfully acquired the zoom capability information, information illustrated in FIGS. 13A and 13B is stored in the RAM 103. On the other hand, if the video output device 200 does not have a zoom function or does not correspond to a command transmitted by the video display device 100, zoom capability information is not stored in the RAM 103.

  If it is determined in step S1109 that the information indicating the zoom capability of the video output device 200 is not stored in the RAM 103, the process proceeds to step S1103. In this case, since the zoom function of the video output device 200 cannot be used, the video display device 100 performs the zoom processing of the video data in the video display device 100 according to the processing in steps S1103 to S1108.

  On the other hand, if it is determined in step S1109 that information indicating the zoom capability of the video output device 200 is stored in the RAM 103, the process proceeds to step S1110. In step S1110, the video display apparatus 100 determines whether or not the zoom operation designated by the user based on the zoom capability information of the video output apparatus 200 stored in the RAM 103, that is, detected in step S1101 described above is possible. Determine whether.

  As an example, a list of zoom ratios indicating that the video output apparatus 200 corresponds to the zoom ratios of 1.0, 2.0, and 3.0 times as illustrated in FIG. Assume that information is stored. In addition, it is assumed that information indicating the zoom ratio currently being output and stored in the RAM 103 indicates a zoom ratio of 2.0. In this case, if the zoom operation detected in step S1101 is zooming in, the zoom rate can be increased by one step. Therefore, the video display apparatus 100 determines that the video output apparatus 200 can execute zoom processing. .

  If it is determined that the zoom processing in the video output device 200 can be executed, the process proceeds to step S1111 and the zoom processing of the displayed video data is performed in cooperation with the video output device 200. The processing of step S1111 to step S1113 is the same as the processing of step S411 to step S413 described with reference to FIG. Also, the processing on the corresponding video output apparatus 200 side is the same as the processing in steps S503 to S505 described with reference to FIG.

  That is, the zoom operation instruction detected in step S1101 according to the user operation is transmitted from the video display device 100 to the video output device 200 as a zoom request using the CEC command (step S1111). This zoom request is received by the video output device 200. The video output device 200 performs zoom processing on the video data stored in the RAM 205 according to the zoom rate instructed by the zoom request. The zoomed video data is stored in the RAM 205. The video output device 200 maps the zoom-processed video data stored in the RAM 205 according to the HDMI format into an HDMI signal, and transmits the HDMI signal to the video display device 100 via the cable 300. The HDMI signal is received by the video display device 100 (step S1112), and finally supplied to the display panel 110, so that the display screen is updated (step S1113).

  As another example, the video output apparatus 200 corresponds to the zoom ratios 1.0, 2.0, and 3.0 as described above, and indicates the zoom ratio of the video data currently being output stored in the RAM 103. Consider the case where the information indicates a zoom factor of 3.0. In this case, since the zoom ratio in the video output device 200 has already reached the upper limit, if the zoom operation detected in step S1101 is zoom in, the video display device 100 executes the zoom process in the video output device 200. Is determined to be impossible.

  In this case, the video display apparatus 100 shifts the processing from step S1110 to step S1103, and performs zoom processing of the currently displayed video data in the video display apparatus 100 in accordance with the processing of step S1103 to step S1108.

  In the above description, the video display device 100 has been described as a television receiver capable of receiving terrestrial digital broadcasting. However, this is not limited to this example. For example, the tuner 104 and the decoder 105 may be omitted from the configuration shown in FIG. In the above description, the video display device 100 is described as supporting full HD video display, but this is not limited to this example.

  Further, the analog video I / F 107 may be further omitted from the video display device 100 in addition to the tuner 104 and the decoder 105, and the video input path may be only HDMI input. In this case, in the flowchart of FIG. 5, it is conceivable that step S402 is omitted and the process is directly shifted from step S401 to step S409.

  Furthermore, in the above description, the video data is described as still image data. However, this is not limited to this example, and the video data may be moving image data.

  In the above description, video and command communication have been described as being performed using HDMI and CEC defined by HDMI. However, this is not limited to this example, and video transmission and bidirectional control are possible. Other interfaces can be applied. As an example, it is conceivable that video input to the video display device 100 is performed using the D terminal, and bidirectional communication of commands is performed using the RS-232C interface.

  Further, in the above description, the video output device 200 is described as a digital camera, but this is not limited to this example. The video output device 200 can process video data with a resolution higher than the display resolution of the video display device 100, has a zoom function of the video data, can transmit the video data to the outside, and is bidirectional. Other types of devices may be used as long as communication means that can be controlled are provided. For example, it is conceivable to apply a digital video camera, a photo storage, or a personal computer as the video output device 200.

  Furthermore, in the above-described first to third embodiments, the present invention can be realized by software by a computer of a system or apparatus (or CPU, MPU, etc.). For example, the video display device 100 and the video output device 200 described above can each be configured by a computer. Therefore, in order to implement the first to third embodiments described above with a computer, the computer program itself supplied to the computer also implements the present invention. That is, the computer program itself for realizing the functions of the above-described embodiments is also one aspect of the present invention.

  Note that the computer program for realizing each of the above-described embodiments may be in any form as long as it can be read by a computer. For example, it can be composed of object code, a program executed by an interpreter, script data supplied to the OS, but is not limited thereto.

  The computer program for realizing each of the above-described embodiments is supplied to the computer via a storage medium or wired / wireless communication. Examples of the storage medium for supplying the program include a magnetic storage medium such as a flexible disk, a hard disk, and a magnetic tape, an optical / magneto-optical storage medium such as an MO, CD, and DVD, and a nonvolatile semiconductor memory.

  As a computer program supply method using wired / wireless communication, there is a method of using a server on a computer network. In this case, a data file (program file) that can be a computer program forming the present invention is stored in the server. The program file may be an executable format or a source code.

  Then, the program file is supplied by downloading to a client computer that has accessed the server. In this case, the program file can be divided into a plurality of segment files, and the segment files can be distributed and arranged on different servers.

  That is, a server apparatus that provides a client computer with a program file for realizing the above-described embodiment is also one aspect of the present invention.

  In addition, a storage medium in which the computer program for realizing the above-described embodiment is encrypted and distributed is distributed, and key information for decrypting is supplied to a user who satisfies a predetermined condition, and the user's computer Installation may be allowed. The key information can be supplied by being downloaded from a homepage via the Internet, for example.

  Further, the computer program for realizing the above-described embodiment may use an OS function already running on the computer.

  Further, a part of the computer program for realizing the above-described embodiment may be configured by firmware such as an expansion board attached to the computer, or may be executed by a CPU provided in the expansion board. Good.

It is a basic diagram which shows roughly the structure of an example of the display system applicable to this invention. It is a block diagram which shows the structure of an example of the video display apparatus applicable to this invention. It is a basic diagram which shows roughly the external appearance of an example of the remote control for remotely operating a video display apparatus. It is a block diagram which shows roughly the structure of an example of a video output device. 6 is a flowchart illustrating an example of processing on the video display device side according to the first embodiment when a zoom-in button or a zoom-out button is pressed. It is a flowchart which shows a process of an example of the video output apparatus side according to the process of the video display apparatus side. It is a basic diagram which shows the zoom rate of an example which a video display apparatus can respond to. It is a basic diagram which shows typically the example of a display at the time of performing zoom display (enlarged display) by the video display apparatus side. It is a basic diagram which shows typically the example of a display at the time of performing zoom display (enlarged display) by the video output device side. It is a flowchart which shows the process of an example at the side of the video display apparatus by 2nd Embodiment when a zoom-in button or a zoom-out button is pressed down. It is a flowchart which shows a process of an example of the video output apparatus side according to the process of the video display apparatus side. It is a flowchart which shows an example process in a video display apparatus when a video output apparatus is connected with respect to a video display apparatus. It is a basic diagram which shows the example of the information which a video display apparatus acquires from a video output device and stores in RAM. 10 is a flowchart illustrating an example of processing on the video display device side according to the third embodiment when a zoom-in button or a zoom-out button is pressed.

Explanation of symbols

100 video display device 101 CPU
103 RAM
106 HDMI transceiver 108 Video processor 110 Display panel 200 Video output device 203 CPU
205 RAM
206 HDMI transceiver 207 Graphic processor 300 Cable 400 Remote control 401 Input switching button 402 Zoom in button 403 Zoom out button

Claims (17)

Video signal input means for inputting a video signal transmitted from an external device;
Display means for displaying on the display device an image related to the video signal input by the video signal input means;
User operation accepting means for accepting a zoom operation by the user;
A communication means capable of communicating with the external device;
In response to the zoom operation, the communication means transmits an inquiry command asking whether or not the external apparatus is capable of zooming the video signal relating to the video displayed by the display means to the external apparatus. Control means for controlling
The control means includes
As a result of the inquiry , if the zoom processing is possible in the external device, the communication means is controlled so as to transmit a zoom request command requesting zoom processing for the video signal to the external device. And controlling the display means to display a video related to the video signal transmitted from the external device in response to the zoom request command and input by the video signal input means,
As a result of the inquiry , when the zoom processing is impossible in the external device, the display means is controlled to display the video signal by performing zoom processing on the video display device. Display device. Video signal input means for inputting a video signal transmitted from an external device;
Display means for displaying on the display device an image related to the video signal input by the video signal input means;
User operation accepting means for accepting a zoom operation by the user;
A communication means capable of communicating with the external device;
Control means for controlling the communication means so as to transmit a zoom request command for requesting a zoom process for the video signal relating to the video displayed by the display means to the external device in response to the zoom operation. ,
The control means includes
Controlling the display means to display an image related to a video signal transmitted from the external device in response to the zoom request command and input by the video signal input means;
In response to transmission of the zoom request command, when the communication indicating that the processing by the zoom request command has failed from the external device, the display means is configured to display the video signal after performing the zoom processing. Control device. Video signal input means for inputting a video signal transmitted from an external device;
Display means for displaying on the display device an image related to the video signal input by the video signal input means;
User operation accepting means for accepting a zoom operation by the user;
A communication means capable of communicating with the external device;
When the external device is connected by the communication unit, the communication unit performs communication for acquiring information indicating the zoom capability of the external device, and the zoom operation is received by the user operation reception unit. to, and control means for controlling said communication means to transmit the information to the based scratch over beam request command indicating the zoom capability to said external device,
The control means includes
When the zoom operation is accepted by the user operation accepting means, information indicating the zoom capability of the external device is acquired, and the information can be zoomed according to the zoom operation. In response to the zoom operation, a zoom request command for requesting a zoom process for the video signal related to the video displayed by the display means is transmitted to the external device, and the zoom request command is sent to the zoom request command. In response, the display means is controlled so as to display a video related to the video signal transmitted from the external device and input by the video signal input means,
When the zoom operation is accepted by the user operation accepting means, information indicating the zoom capability of the external device is not acquired, or the information cannot be zoomed according to the zoom operation. If so, the video display device controls the display means so as to display the video signal after performing the zoom process. Zoom processing means for performing zoom processing on the video signal;
Wherein the control means performs the zoom processing with the zoom processing unit, according to claim 1, characterized in that to control the so that to display an image subjected to the zooming process to the display device and more on the display means The video display device according to claim 3. The video signal output from the external device is a video signal related to a video having a resolution higher than a display resolution of the display device . Video display device. The control means includes
When the user operation accepting means accepts the zoom operation, it is determined whether or not the video being displayed on the display means is an image related to the video signal input from the video signal input means, and the display means The communication unit is controlled to transmit the zoom request command when it is determined that the video currently displayed on the screen is a video related to the video signal input from the video signal input unit. The video display device according to any one of claims 1 to 5. Video signal input means for inputting a video signal transmitted from an external device;
Display means for displaying on the display device an image related to the video signal input by the video signal input means;
User operation accepting means for accepting a zoom operation by the user;
A control method for a video display device comprising a communication means capable of communicating with the external device,
Transmission that transmits to the external device an inquiry command that inquires whether or not the external device can perform zoom processing on the video signal related to the video displayed by the display unit in response to the zoom operation. Steps,
The control means
As a result of the inquiry by the transmission step , when the zoom processing is possible in the external device, the communication means is controlled to transmit a zoom request command for requesting zoom processing for the video signal, and Controlling the display means to display an image related to a video signal transmitted from the external device in response to the zoom request command and input by the video signal input means;
As a result of the inquiry , if the zoom processing is impossible in the external device, a control step of controlling the display means so as to display the video signal by performing zoom processing on the video display device ; A control method for a video display device, comprising: Video signal input means for inputting a video signal transmitted from an external device;
Display means for displaying on the display device an image related to the video signal input by the video signal input means;
User operation accepting means for accepting a zoom operation by the user;
A control method for a video display device comprising a communication means capable of communicating with the external device,
Transmission means comprises a transmission step wherein in response to a zoom operation, sends the zoom request command for requesting a zoom process on the video signal according to the image that is displayed by the display means to the external apparatus,
The control means
Controlling the display means to display an image related to a video signal transmitted from the external device in response to the zoom request command and input by the video signal input means;
In response to transmission of the zoom request command, when the communication indicating that the processing by the zoom request command has failed from the external device, the display means is configured to display the video signal after performing the zoom processing. And a control step for controlling the video display device. Video signal input means for inputting a video signal transmitted from an external device;
Display means for displaying on the display device an image related to the video signal input by the video signal input means;
User operation accepting means for accepting a zoom operation by the user;
A control method for a video display device comprising a communication means capable of communicating with the external device,
A communication step in which, when the external device is connected by the communication unit , a control unit performs communication for acquiring information indicating the zoom capability of the external device to the external device by the communication unit;
The control means is
When the zoom operation is received by the user operation receiving means, information indicating the zoom capability of the external device is acquired, and the information can be zoomed according to the zoom operation. In response to the zoom operation, a zoom request command for requesting a zoom process for the video signal related to the video displayed by the display means is transmitted to the external device, and the zoom request command is sent to the zoom request command. In response, the display means is controlled so as to display a video related to the video signal transmitted from the external device and input by the video signal input means,
When the zoom operation is accepted by the user operation accepting unit, information indicating the zoom capability of the external device is not acquired, or the information cannot be zoomed according to the zoom operation. If so, a control step of controlling the display means so as to display the video signal after performing zoom processing on the video signal. A video output device having zoom processing means for performing zoom processing on the video signal, and outputting the video signal;
User operation accepting means for accepting a zoom operation by the user;
A video display device having display means for displaying video related to the input video signal on the display device;
Video signal transmitting means for transmitting the video signal output from the video output device to the video display device;
Communication means capable of communication between the video output device and the video display device,
The video display device, in response to said zoom operation, a query command to zoom processing for the video signal according to the image that is displayed by the display means inquire whether in the video output apparatus, through said communication means To the video output device,
The video output device, upon receiving the inquiry command, the zoom processing in response to the inquiry command transmits the information showing whether the video output device, the image display device via the communication means,
The video display device, when the zoom processing when receiving the information showing whether the video output device, indicating that the information is capable of zooming processing in said image output device, to said video signal the zoom request command, and sends to the video output device through the communication means,
The video output device, upon receiving the zoom request command, performs the zoom processing on the image signal by the zoom processing means in accordance with the zoom request command, the video signal subjected to the zooming process, Transmitting to the video display device via the video signal transmitting means,
The video display system, wherein the video display device displays a video related to the video signal subjected to the zoom process received through the video signal transmission unit on the display unit. A video output device having zoom processing means for performing zoom processing on the video signal, and outputting the video signal;
User operation accepting means for accepting a zoom operation by the user;
A video display device having display means for displaying video related to the input video signal on the display device;
Video signal transmitting means for transmitting the video signal output from the video output device to the video display device;
Communication means capable of communication between the video output device and the video display device,
The video display device, in response to said zoom operation, a zoom request command for requesting a zoom process on the video signal according to the image that is displayed by the display means, said transmitted to the video output device through the communication means ,
When receiving the zoom request command, the video output device performs the zoom processing on the video signal by the zoom processing means in response to the zoom request command, and performs the zoom processing when the zoom processing is successful. a video signal, said transmitted to the image display device via the video signal transmitting means, performed on the video display device by said communication means communicating to that effect When the zoom process fails,
The video display device controls the display unit to display a video related to the video signal that has been subjected to the zoom process in response to the zoom request command received via the video signal transmission unit, and the zoom In response to the transmission of a request command, if the communication means indicates that the zoom process has failed, the display means is controlled to display the video signal after performing the zoom process. Video display system. A video output device having zoom processing means for performing zoom processing on the video signal, and outputting the video signal;
User operation accepting means for accepting a zoom operation by the user;
A video display device having display means for displaying video related to the input video signal on the display device;
Video signal transmitting means for transmitting the video signal output from the video output device to the video display device;
Communication means capable of communication between the video output device and the video display device,
When the video output device is connected by the communication means, the video display device performs communication for acquiring information indicating the zoom capability of the video output device to the video output device by the communication means,
The image output device, as long as it has the zoom capability, information indicating the zoom capabilities in accordance with the communication, and transmitted to the image display device via the communication means,
When the zoom operation is accepted by the user operation accepting unit, the video display device acquires information indicating the zoom capability of the video output device, and the information corresponds to the zoom operation. If it indicates that zoom processing is possible, in response to the zoom operation, a zoom request command for requesting zoom processing for the video signal related to the video displayed by the display means is transmitted to the video output device. , Controlling the display means to display the video related to the video signal subjected to the zoom process in response to the zoom request command received via the video signal transmission means,
When the zoom operation is accepted by the user operation accepting unit, information indicating the zoom capability of the video output device is not acquired, or the information cannot be zoomed according to the zoom operation. If so, the display means is controlled so as to display the image signal after performing the zoom process. The video display device
Further comprising other zoom processing means for performing zoom processing on the video signal,
When performing the zoom process on the video signal in the video display device, the zoom process is performed using the other zoom processing unit, and the image subjected to the zoom process is displayed on the display unit. 13. The video display system according to claim 10, wherein the video display system is controlled. The video display device displays video by the display means at a predetermined resolution,
14. The video output device according to claim 10, wherein the video output device performs the zoom processing by the zoom processing unit on a video signal having a resolution higher than the predetermined resolution. Video display system. A video output device having zoom processing means for performing zoom processing on the video signal, and outputting the video signal;
User operation accepting means for accepting a zoom operation by the user;
A video display device having display means for displaying video related to the input video signal on the display device;
Video signal transmitting means for transmitting the video signal output from the video output device to the video display device;
A video display control method for a video display system comprising a communication means capable of communicating between the video output device and the video display device,
The video display device, in response to said zoom operation, a query command to zoom processing for the video signal according to the image that is displayed by the display means inquire whether in the video output apparatus, through said communication means To the video output device,
The video output device, upon receiving the inquiry command, the zoom processing in response to the inquiry command transmits the information showing whether the video output device, the image display device via the communication means,
The video display device, when the zoom processing when receiving the information showing whether the video output device, indicating that the information is capable of zooming processing in said image output device, to said video signal the zoom request command, and sends to the video output device through the communication means,
The video output device, upon receiving the zoom request command, performs the zoom processing on the image signal by the zoom processing means in accordance with the zoom request command, the video signal subjected to the zooming process, Transmitting to the video display device via the video signal transmitting means,
The video display apparatus displays the video signal subjected to the zoom process received through the video signal transmission unit on the display unit. A video output device having zoom processing means for performing zoom processing on the video signal, and outputting the video signal;
User operation accepting means for accepting a zoom operation by the user;
A video display device having display means for displaying video related to the input video signal on the display device;
Video signal transmitting means for transmitting the video signal output from the video output device to the video display device;
A video display control method for a video display system comprising a communication means capable of communicating between the video output device and the video display device,
The video display device, in response to said zoom operation, a zoom request command for requesting a zoom process on the video signal according to the image that is displayed by the display means, said transmitted to the video output device through the communication means ,
When receiving the zoom request command, the video output device performs the zoom processing on the video signal by the zoom processing means in response to the zoom request command, and performs the zoom processing when the zoom processing is successful. a video signal, said transmitted to the image display device via the video signal transmitting means, performed on the video display device by said communication means communicating to that effect When the zoom process fails,
The video display device controls the display unit to display a video related to the video signal that has been subjected to the zoom process in response to the zoom request command received via the video signal transmission unit, and the zoom In response to transmission of a request command, when communication indicating that the zoom process has failed is performed by the communication unit, the display unit is controlled to perform zoom processing on the video signal for display. Video display control method. A video output device having zoom processing means for performing zoom processing on the video signal, and outputting the video signal;
User operation accepting means for accepting a zoom operation by the user;
A video display device having display means for displaying video related to the input video signal on the display device;
Video signal transmitting means for transmitting the video signal output from the video output device to the video display device;
A video display control method for a video display system comprising a communication means capable of communicating between the video output device and the video display device,
When the video output device is connected by the communication means, the video display device performs communication for acquiring information indicating the zoom capability of the video output device to the video output device by the communication means,
The image output device, as long as it has the zoom capability, information indicating the zoom capabilities in accordance with the communication, and transmitted to the image display device via the communication means,
When the zoom operation is accepted by the user operation accepting unit, the video display device acquires information indicating the zoom capability of the video output device, and the information corresponds to the zoom operation. If it indicates that zoom processing is possible, in response to the zoom operation, a zoom request command for requesting zoom processing for the video signal related to the video displayed by the display means is sent to the video output device. Transmitting and controlling the display means to display an image related to the video signal subjected to the zoom process in response to the zoom request command received via the video signal transmission means,
When the zoom operation is accepted by the user operation accepting unit, information indicating the zoom capability of the video output device is not acquired, or the information cannot be zoomed according to the zoom operation. If so, the video display control method is characterized in that the display means is controlled to display the video signal after performing zoom processing.

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