JP2012114879A - Electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic device capable of outputting to an external display device an image signal provided with information identifying the image as an image of a type which is preferable to be displayed at the moment.SOLUTION: The electronic device is provided with: an output part which outputs the image signal to the external display device; a discrimination part which discriminates whether a display image corresponding to the image signal output by the output part is an image signal of the type which is preferable to be displayed on the external display device at the moment; and a switch part which switches information on a content type to be provided to the image signal and output in accordance with the type.

Description

  The present invention relates to an electronic device.

  There is known a digital camera that outputs an image signal to a display device using a digital interface such as HDMI (High Definition Multimedia Interface) (for example, see Patent Document 1). When the digital camera outputs an image signal to the display device, the display device determines whether the image is a moving image or a still image based on the image signal, and is suitable for each of the moving image and the still image based on the determination result. Image processing is performed to display an image based on the image signal.

JP 2010-4553 A

  However, in the output of the image signal of this digital camera, since a delay time from when the image signal is output until the image is displayed on the display device is not taken into consideration, a live view image, a game image, or the like is output. It was not suitable for displaying an image that is preferably displayed immediately after that.

  An object of the present invention is to provide an electronic apparatus capable of outputting an image signal to which information indicating that the image is a type of image that is preferably displayed immediately is added to an external display device.

  In the electronic apparatus according to the present invention, an output unit that outputs an image signal to an external display device, and a display image corresponding to the image signal output by the output unit are immediately displayed on the external display device. The image processing apparatus includes a determination unit that determines whether or not the image signal is a preferable type and a switching unit that switches information on a content type to be added to the image signal and output based on the type.

  The electronic apparatus according to the present invention captures a display image displayed on the external display device corresponding to the image signal output by the output unit, and an output unit that outputs an image signal to the external display device. And an imaging unit that measures display characteristics based on a captured image acquired by the imaging unit while switching content type information to be output in addition to the image signal.

  According to the electronic apparatus of the present invention, it is possible to output an image signal to which information indicating that the type of image is preferably displayed immediately is added to the external display device.

It is a block diagram which shows the system configuration | structure of the camera which concerns on embodiment of this invention. It is a block diagram which shows the system configuration | structure of the television which concerns on embodiment of this invention. It is a flowchart which shows the image signal output process with respect to the television of the camera which concerns on embodiment of this invention. It is a flowchart which shows the delay time measurement process of the camera which concerns on embodiment of this invention. It is a flowchart which shows the delay time measurement process of the camera which concerns on embodiment of this invention. It is a figure which shows the display image corresponding to the image signal of the test pattern output from the camera which concerns on embodiment of this invention. It is a figure which shows the display image corresponding to the image signal of the test pattern output from the camera which concerns on embodiment of this invention. It is a flowchart which shows the image signal output process with respect to the television after the delay time measurement process of the camera which concerns on embodiment of this invention. It is a figure which shows the display image corresponding to the image signal of the test pattern output from the camera which concerns on embodiment of this invention.

  Hereinafter, an electronic apparatus according to a first embodiment of the present invention will be described with reference to the drawings, taking a camera as an example. FIG. 1 is a block diagram showing a system configuration of a camera according to the embodiment. The camera 2 includes a CPU 4. The CPU 4 includes a release button 6 for receiving a release instruction operation, an operation member 8 including a selection key and a determination key for menu operation, an image processing MCU 12, a CCD or a CMOS, and a photographic lens (not shown). A card slot 32 for connecting a memory card 34 for recording image data and a delay time for each content type of a television, Various programs executed by the CPU 4 such as data relating to operation settings of the image processing MCU 12, test pattern image data used in delay time measurement, and programs corresponding to the processing shown in the flowcharts described later (see FIGS. 3 to 5 and FIG. 8). FLASH ROM 36 to store, image sensor 2 The digital image data generated by performing A / D conversion on the analog image signal output from the RAM 38 is temporarily stored, and is based on still image data or moving image image data stored in the memory card 34. Based on an image or live view image that is an image based on a photographic signal output from the image sensor 24, a display output circuit 40 that reproduces or displays a signal corresponding to various setting menu screens, and a high-definition multimedia interface (HDMI) standard. An HDMI output unit 44 that outputs a signal corresponding to an image signal, an audio signal, and an information packet (hereinafter, information packet) is connected.

  The CPU 4 detects an operation by each operation unit constituting the operation member 8 and executes a process according to the detected result. When the operation of the release button 6 is detected, the CPU 4 controls the image sensor 24 to expose for an appropriate exposure time. An analog imaging signal obtained by exposure by the imaging device 24 is converted into a digital signal and output to the image processing MCU 12. In response to an instruction from the CPU 4, the image processing MCU 12 performs image processing such as color interpolation processing, white balance adjustment processing, and code compression processing on the input digital image signal to generate image data for recording. The recording image data generated in this way is recorded in a predetermined folder formed on the memory card 34 in accordance with an instruction from the CPU 4.

  The display output circuit 40 is connected to an HDMI output unit 44 and an LCD display unit 46 provided in the camera 2. The HDMI output unit 44 is connected to an external display device such as a television 50 by a cable 48. Is connected. Here, the HDMI output unit 44 has a function of transmitting an electrical signal (information) via the connector 48 to an external device connected via HDMI.

  FIG. 2 is a block diagram showing a system configuration of the television according to the embodiment of the present invention. The television 50 includes a CPU 54. The CPU 54 has a DTV (digital television) processor 56, an audio processing unit 58, an image processing unit 60, a receiving unit 62 that receives electrical signals (information), and an operation for accepting an input operation by a user. 64, ROM 68 for storing various control programs such as programs corresponding to the processing shown in the display mode corresponding to the content type and the flowcharts described later (see FIGS. 4 and 5), and data used for the control processing are temporarily stored. A RAM 70, an audio output control unit 77, an LCD control unit 84, and a BL (backlight) control unit 88 are connected.

  When the tuner 72 receives a broadcast signal such as a terrestrial digital wave via an antenna (not shown), the demodulator 74 demodulates the broadcast signal. The demodulated broadcast signal is input to the DTV processor 56. The DTV processor 56 divides the broadcast signal into an audio signal output to the audio processing unit 58 and an image signal output to the image processing unit 60 and inputs them to the CPU 54. The CPU 54 outputs an audio signal to the audio processing unit 58 and outputs an image signal to the image processing unit 60. In addition, information signals that are not audio signals and image signals among the broadcast signals are output to the CPU 54.

  The receiving unit 62 outputs a signal input via the connector 76 to the CPU 54. The CPU 54 outputs the input signal to the DTV processor 56. The DTV processor 56 divides the input signal into an audio signal and an image signal and inputs them to the CPU 54. The CPU 54 outputs an audio signal to the audio processing unit 58 and outputs an image signal to the image processing unit 60.

  The audio processing unit 58 performs processing on the input audio signal, and audio based on the audio signal is output from the speaker 78 under the control of the audio output control unit 77. The image processing unit 60 performs image processing on the input image signal, and displays an image based on the image signal on the LCD panel 86 by the LCD control unit 84. Here, the sound output control unit 77 performs sound output control in consideration of the timing of the sound output from the speaker 78 and the image displayed on the LCD panel 86. Further, while the image is being output to the LCD panel 86, the BL controller 88 turns on the BL 90 in order to keep the brightness of the LCD panel 86.

  In the HDMI standard, an information packet is output from the CPU 4 of the camera 2 to the television 50 in addition to the image signal and the audio signal. Of the information packets output from the CPU 4 of the camera 2, the display mode on the television 50 can be specified by information indicating the content type of the AVI InfoFrame. Here, the content type is “game” which is a content type suitable for game display, “cinema” which is a content type suitable for movie viewing, and “photo” which is a content type suitable for still image viewing such as photographs. ”,“ Graphic ”which is a content type suitable for displaying characters, and“ No Data ”which does not specify the above-mentioned content type.

  In the television 50, when the information indicating the content type is “game”, the CPU 54 outputs the output time point when the image signal is output from the HDMI output unit 44 of the camera 2 and the display image corresponding to the image signal on the LCD panel 86. “Game mode”, which is a display mode with a small delay time indicating the time difference between them, is read from the ROM 68, and when the information indicating the content type is “Cinema”, the CPU 54 performs image processing such as lowering the color temperature assuming a movie theater. “Movie mode”, which is a display mode for displaying video, is read from the ROM 68, and when the information indicating the content type is “Photo”, the CPU 54 is “Display”, which is a display mode for displaying high-quality video on the LCD panel 86. Mode "is read from the ROM 68, and information indicating the content type is When a graphical "CPU54 reads a display mode for performing contrast adjustment to clearly display the character" graphics mode "from the ROM 68. Then, the CPU 54 controls the LCD control unit 84 to display an image on the LCD panel 86 in the display mode read from the ROM 68. Further, when the CPU 54 determines that the information indicating the content type is “No Data”, the “default mode” that is a preset standard display mode is read from the ROM 68 and the image is displayed. Note that the names of these display modes and the display forms corresponding to these modes are merely examples, and are not limited to these names.

  Here, in the “movie mode”, the CPU 54 of the television 50 controls the image processing unit 60 to perform image processing for changing the color temperature on the original image. In the “graphic mode”, the CPU 54 of the television 50 In the “photo mode”, the CPU 54 of the TV 50 controls the image processing unit 60 to perform noise clarification on the original image. Perform reduction processing. On the other hand, in the “game mode”, the CPU 54 of the television 50 does not perform image processing for changing the color temperature, noise reduction processing, or the like, so that the delay time can be reduced as compared with display in other modes. However, these modes and the types of image processing for these modes are examples, and the CPU 54 of the television 50 may control the image processing unit 60 to perform other types of image processing in these modes.

  In addition, when a moving image is displayed on a general television, interpolation processing is performed. For example, in the television 50, the CPU 54 controls the image processing unit 60 to perform an interpolation process for inserting an interpolated image between successive frames, and performs a process for smoothly displaying a moving image. In the “game mode”, the CPU 54 of the television 50 may omit the interpolation process, and in this case, the generation amount of the delay time can be suppressed.

  Next, image signal output processing for the television of the camera according to the embodiment will be described with reference to the flowchart shown in FIG. This image signal output process is performed by the CPU 4 reading and executing a corresponding program from the FLASH ROM 36.

  When the user displays the menu screen on the LCD display unit 46 using the operation member 8 of the camera 2 and the CPU 4 determines that the output of the image and sound to the external display device based on the HDMI standard is selected, the CPU 4 The television 50 determines whether or not the HDMI connection is made through the connector 48 and the connector 76 (step S1). When it is determined that the HDMI connection is performed, the CPU 4 determines whether the image signal output to the television 50 is an image signal of a live view image that is preferably displayed immediately (step S2). ). On the other hand, when it is determined in step S1 that the HDMI connection is not performed, the process shown in step S1 is performed again to determine whether the HDMI connection is performed.

  If it is determined that the image signal to be output is a live view image (step S2), the CPU 4 determines that the content type information of the AVI InfoFrame in the HDMI standard information packet is a “game” that is estimated to have the shortest delay time. It adds to an image signal and outputs with respect to the television 50 (step S3). In the television 50, when the image signal is received via the connector 76, the CPU 54 refers to the correspondence between the display mode and the content type stored in the ROM 68, and indicates the content type added to the received image signal. The display mode corresponding to is determined. The CPU 54 reads “game mode”, which is a display mode corresponding to the case where it is determined that the content type is “game”, and performs display in “game mode”.

  On the other hand, if the CPU 4 determines that the output image signal is an image signal other than a live view image such as a still image based on the image data stored in the memory card 34 (step S2), information indicating the content type is displayed. It is added to the image signal as “photo” and output to the television 50 (step S4). In the camera 2, when outputting an image signal other than the live view image, a still image such as image data of a captured image is often output, and thus information indicating the content type is “photo”. In the television 50, when the image signal is received via the connector 76, the CPU 54 refers to the correspondence between the display mode and the content type stored in the ROM 68, and indicates the content type added to the received image signal. The display mode corresponding to is determined. When the CPU 54 determines that the content type is “photo”, the CPU 54 reads “photo mode”, which is a corresponding display mode, and performs display in “photo mode”.

  Next, display delay time measurement processing on a television with respect to the output of the camera according to the embodiment will be described with reference to flowcharts shown in FIGS. This delay time measurement process is performed by the CPU 4 reading and executing the corresponding program from the FLASH ROM 36 in the camera 2, and the CPU 54 reading and executing the corresponding program from the ROM 68 in the television 50.

  The user displays the menu screen on the LCD display unit 46 using the operation member 8 of the camera 2, the output time point when the image signal is output from the HDMI output unit 44 of the camera 2, and the display image corresponding to the output image signal, When the CPU 4 determines that the delay time measurement mode for measuring the delay amount indicating the time difference between the camera 2 and the television 50 is selected, the CPU 4 determines whether or not the HDMI connection is established between the camera 2 and the television 50 via the connector 48 and the connector 76. Determination is made (step S11). If it is determined that the HDMI connection is not performed, the process shown in step S11 is performed again to determine whether the HDMI connection is performed.

  On the other hand, if it is determined that the HDMI connection is performed, the CPU 4 reads the confirmation test pattern from the FLASH ROM 36 and outputs the confirmation test pattern image signal to the television 50 via the HDMI output unit 44. (Step S12). At this time, the television 50 displays a display image corresponding to the image signal of the test pattern for confirmation received via the receiving unit 62 on the LCD panel 86.

  Next, the CPU 4 displays a message for capturing an image of the test pattern for confirmation displayed on the television 50, such as “Please point the camera at the television” (step S13). Here, the message may be displayed on the LCD display unit 46 of the camera 2 or may be displayed on the television 50 by outputting a video signal indicating the message to the television 50 via the HDMI output unit 44. .

  Next, the CPU 4 starts live view shooting, analyzes an image acquired by live view shooting, and determines whether the test pattern for confirmation displayed on the television 50 is within the shooting angle of view of the camera 2. (Step S14). For example, the display image corresponding to the image signal of the test pattern for confirmation is preferably an image that draws a pattern on the entire screen, an image that draws a pattern on the four corners of the screen, or an image that draws a pattern on the four sides of the screen. . When the CPU 4 recognizes the entire region of such a pattern in the image photographed by the camera 2, it determines that the confirmation test pattern is within the photographing angle of view, and at least one of such patterns. If the area of the part is not recognized, it is determined that the confirmation test pattern does not fall within the angle of view of the camera 2. If it is determined that the confirmation test pattern does not fall within the angle of view of the camera 2, the process shown in step S <b> 14 is repeated until the confirmation test pattern falls within the angle of view of the camera 2.

  When it is determined that the test pattern for confirmation is within the angle of view of the camera 2, the CPU 4 ends the live view shooting and displays a measurement start message (step S15), and a delay time measurement start instruction from the user. It is determined whether or not has been performed (step S16). If no delay time measurement start instruction is issued, the process waits until a delay time measurement start instruction is issued. Here, the measurement start message in step S15 may be displayed on the LCD display unit 46 of the camera 2, or a video signal indicating the message is output to the television 50 via the HDMI output unit 44. 50 may be displayed. For example, this delay time measurement start instruction is operated by operating the release button 8.

  When the CPU 54 determines that a delay time measurement start instruction has been operated, the CPU 54 determines that a delay time measurement start instruction has been performed (step S16), and the CPU 4 sends the AVI InfoFrame content to the TV 50 via the HDMI output unit 44. An information packet whose type information is “No Data” is output (step S17). At this time, in the television 50, the CPU 54 refers to the correspondence between the display mode and the content type stored in the ROM 68. Then, “default mode” that is a display mode corresponding to the case where the information indicating the content type is “No Data” is read out, and the display is set to perform display in “default mode”.

  Next, the CPU 4 of the camera 2 starts outputting an image signal of a test pattern for delay time measurement to the television 50 via the HDMI output unit 44 (step S18), and after a predetermined time such as 3 seconds after the start of output. Imaging of a display image corresponding to the image signal of the test pattern for delay time measurement displayed on the LCD panel 86 of the television 50 after the elapse of time is started (step S19).

  Here, for example, the camera 2 outputs an image signal of a test pattern that changes every frame, and displays the display image corresponding to the image signal of the test pattern displayed on the television 50 on the television 50 by performing live view shooting. Monitor the image being played. The CPU 4 obtains a captured image by performing live view shooting for a predetermined time, for example, for 5 seconds, and the display image displayed on the television 50 is an image of a test pattern that is several frames before the currently output test pattern. The delay time when the information indicating the content type is “No Data” based on the determination result is measured (step S19). It is assumed that the frame rate in the test pattern for measuring the delay time (the time from when a certain frame is displayed until switching to the next frame) is fixed.

  The CPU 4 measures the delay time by recognizing the character, recognizing the block length, or recognizing the confirmation test pattern having the predetermined frame rate.

  When the delay time is measured by recognizing characters, for example, an image showing characters is used as a test pattern as shown in FIG. In this case, an image signal of an image indicating “1” is output in the first frame, an image signal of an image indicating “2” is output in the second frame, and an image signal indicating “3” is output in the third frame. An image signal is output, and in the camera 2, the CPU 4 recognizes a number using a character recognition function. Based on the acquired captured image, the CPU 4 determines how many frames before the currently output test pattern the display image displayed on the television 50 is, and obtains a delay time.

  When the delay time is measured by recognizing the block length, an image displaying a reference block having a predetermined length is used as a test pattern as shown in FIG. In this case, the reference block 92 and the expansion block 94 are displayed in all the frames, and an image signal in which the expansion block 94 extends a predetermined length whenever the number of frames increases. The length of the extension block 94 is recognized with reference to the block 92. Based on the acquired captured image, the CPU 4 determines how many frames before the currently output test pattern the display image displayed on the television 50 is, and obtains a delay time. When the delay time when the information indicating the content mode is “No Data” is measured, the output of the test pattern video signal for the delay time measurement started in the process shown in step S18 and the live started in the process shown in step S19. The view shooting is terminated (step S21).

  Next, the CPU 4 outputs an information packet in which the content type information of the AVI InfoFrame is “game” to the television 50 via the HDMI output unit 44 (step S22). At this time, in the television 50, the CPU 54 refers to the correspondence between the display mode and the content type stored in the ROM 68. Then, “game mode” which is a display mode corresponding to the case where the information indicating the content type is “game” is read out, and a setting is made to perform display according to “game mode”.

  Next, the CPU 4 of the camera 2 starts outputting an image signal of a test pattern for delay time measurement to the television 50 via the HDMI output unit 44 (step S23), and after a predetermined time such as 3 seconds after the start of output. After the elapse of time, imaging of the display image corresponding to the video signal of the test pattern displayed on the LCD panel 86 on the television 50 is started (step S24). Next, similarly to the process shown in step S20, the delay time when the information indicating the content mode is “game” is measured (step S25).

  When the delay time when the information indicating the content mode is “game” is measured, the output of the video signal of the test pattern for delay time measurement started in the process shown in step S23 and the live view started in the process shown in step S24. The shooting is finished (step S26).

  Next, the CPU 4 outputs an information packet in which the content type information of the AVI InfoFrame is “photo” to the television 50 via the HDMI output unit 44 (step S27). At this time, in the television 50, the CPU 54 refers to the correspondence between the display mode and the content type stored in the ROM 68. Then, a “photo mode” that is a display mode corresponding to the case where the information indicating the content type is “photo” is read out, and a setting is made to display in the “photo mode”.

  Next, the CPU 4 of the camera 2 starts outputting an image signal of a test pattern for delay time measurement to the television 50 via the HDMI output unit 44 (step S28), and after a predetermined time such as 3 seconds after the start of output. After the elapse of time, imaging of a display image corresponding to the video signal of the test pattern displayed on the LCD panel 86 on the television 50 is started (step S29). Next, the delay time when the information indicating the content mode is “photo” is measured in the same manner as the process shown in step S20 (step S30). When the delay time when the information indicating the content mode is “photo” is measured, the output of the video signal of the test pattern for delay time measurement and the live view shooting are finished (step S31).

  Next, the CPU 4 outputs an information packet in which the content type information of the AVI InfoFrame is “cinema” to the television 50 via the HDMI output unit 44 (step S32). At this time, in the television 50, the CPU 54 refers to the correspondence between the display mode and the content type stored in the ROM 68. Then, “movie mode”, which is a display mode corresponding to the case where the information indicating the content type is “cinema”, is read out, and a setting for performing display in “movie mode” is performed.

  Next, the CPU 4 of the camera 2 starts outputting an image signal of a test pattern for delay time measurement to the television 50 via the HDMI output unit 44 (step S33), and after a predetermined time such as 3 seconds after the start of output. After the time has elapsed, imaging of a display image corresponding to the video signal of the test pattern displayed on the LCD panel 86 on the TV 50 is started (step S34), and the information indicating the content mode is “cinema” as in the process shown in step S20. The delay time in the case of is measured (step S35). When the delay time when the content mode is “cinema” is measured, the output of the video signal of the test pattern for delay time measurement and the live view shooting are finished (step S36).

  Next, the CPU 4 outputs an information packet in which the AVI InfoFrame content type information is “graphic” to the television 50 via the HDMI output unit 44 (step S37). At this time, in the television 50, the CPU 54 reads out the “graphic mode”, which is a display mode corresponding to the case where the information indicating the content type is “graphic”, from the ROM 68, and sets the display in the “graphic mode”.

  Next, the CPU 4 of the camera 2 starts outputting a video signal indicating a test pattern for delay time measurement to the television 50 via the HDMI output unit 44 (step S38), 3 seconds after the start of output, etc. Imaging of an image displayed on the LCD panel 86 on the television 50 is started after a predetermined time has elapsed (step S39), and the delay time when the information indicating the content mode is “graphic” is measured as in the process shown in step S20. (Step S40). When the delay time when the information indicating the content mode is “graphic” is measured, the output of the video signal of the test pattern for delay time measurement and the live view shooting are finished (step S41).

  Next, the CPU 4 records the delay time for each content type in the memory card 34 (step S42). Here, when the model name of the television 50 can be acquired from the live view image by character recognition, pattern recognition, or the like, the delay time for each content type is recorded in the memory card 34 in association with the model name. When the camera 2 can receive the information output from the receiving unit 62 of the TV 50, the CPU 4 of the camera 2 acquires the model name information of the TV 50 through the HDMI connection, and the model name information and each information The delay time in the content type may be associated and stored in the memory card 34. When delay times are measured for a plurality of models, a database may be constructed by recording the delay times for each content type associated with the model name.

  Next, the output process of the camera to the television after measuring the delay time will be described with reference to the flowchart shown in FIG. This output process is performed by the CPU 4 reading and executing a corresponding program from the FLASH ROM 36.

  When the CPU 4 determines that the user has selected video and audio output to the external display device according to the HDMI standard by a menu operation with reference to the screen displayed on the LCD display unit 46 using the operation member 8 of the camera 2, the CPU 4 Determines whether the camera 2 and the television 50 are HDMI-connected through the connector 48 and the connector 76 (step S51). If it is determined that the HDMI connection has been made, it is determined whether or not the delay time of the television 50 to which the HDMI connection has been made has already been measured (step S52). On the other hand, when it is determined in step S51 that the HDMI connection is not performed, the process shown in step S51 is performed to determine whether the HDMI connection is performed again.

  If the CPU 4 determines in step S52 that the delay time of the television 50 has already been measured, the CPU 4 determines whether the image signal output to the television 50 is an image signal of a live view image (step S54). . Here, when the information on the model name of the TV 50 and the delay time for each content type are stored in the memory card 34 in association with each other, or the delay time for each content type associated with the model name of the TV 50 is stored in the database. If it is, the CPU 4 determines that the delay time of the television 50 has already been measured.

  If it is determined in step S52 that the delay time of the television 50 has not yet been measured, the delay time measurement process shown in FIGS. 4 and 5 is performed (step S53), and the process shown in step S54 is performed.

  If it is determined in step S54 that the image signal to be output is an image signal of a live view image, the content type having the smallest delay time in the delay time measurement process is selected as the content type of the AVI InfoFrame content information in the HDMI standard information packet. Information is added to the image signal and output to the television 50 (step S55).

  On the other hand, if it is determined that the image signal to be output is an image signal other than the live view image (step S54), information indicating the content type is added to the image signal as “photo” and output to the television 50. (Step S56).

  According to the camera of the present embodiment, it is possible to output an image signal to which information indicating that the type of image is preferably displayed immediately is added to the external display device.

  If it is determined that the delay time of the television 50 has not yet been measured in the process of step S52 of the flowchart shown in FIG. 8 of the above-described embodiment, the delay time measurement process shown in FIGS. 4 and 5 is performed. Although described as a configuration, when the delay time has not yet been measured, the output processing for the television of the camera shown in FIG. 3 may be performed. That is, even when the delay time has not yet been measured, the delay time is not estimated and the delay time is estimated to be the shortest when the output image signal is an image signal of a live view image. Content type information is added to the image signal and output. For example, as shown in FIG. 3, the content type information to be added is “game” when the output image signal is a live view image signal, and the content to be added when the image signal is other than the live view image. The type information is “photo”.

  In the above-described embodiment, the display unit of the television 50 has been described as the LCD panel 86. However, an organic EL panel or a plasma display panel may be used.

  In the above-described embodiment, the configuration using characters or reference blocks as a test pattern used for delay time measurement has been described as an example. However, a configuration using reference colors as test patterns may be used. In this case, as shown in FIG. 9, the reference color block 96 is output in all frames, and a test pattern in which the color changes in the region 98 other than the reference color block 96 is output for each frame. For example, the CPU 4 of the camera 2 outputs the white and black reference color blocks 96 to the television 50 via the HDMI output unit 44, and in the region 98, the first frame is red, the second frame is green, the third frame is The CPU 4 of the camera 2 outputs a test pattern image signal to the television 50 so that a display image displaying blue is displayed. The camera 2 recognizes the color of the region 98 based on the color of the reference color block 96 based on the captured image acquired by live view shooting. The CPU 4 determines how many frames before the currently output test pattern the display image displayed on the television 50 is based on the live view image and obtains the delay time.

  In the above-described embodiment, the delay time indicating the time difference between the output time point when the image signal is output from the camera 2 and the display image corresponding to the image signal on the television 50 is measured. If the CPU 4 determines that an external device such as an AV amplifier is connected to the television 50, the CPU 4 measures the delay time between the camera 2 and the television system including the television and the external device. It is good also as a structure which performs a process.

  In the flowcharts shown in FIGS. 4 and 5 of the above-described embodiment, the content type is set to “No Data”, “Game”, “Photo”, “Cinema” when performing the delay time measurement process while switching the content type. However, the order of switching the content type is arbitrary, and any order may be used.

  In the above-described embodiment, the configuration in which the image signal of the live view image is output as the type of image signal that is preferably displayed immediately on the camera has been described as an example. However, the image is preferably displayed immediately. For example, a game machine may output a game image signal as the type of image signal.

  In the above-described embodiment, the configuration in which the image signal of the test pattern is output to the television 50 and the delay time is measured has been described as an example. The configuration in which the resolution of the display image corresponding to the image signal of the test pattern is measured. It is good. In this case, similarly to the processing shown in FIGS. 4 and 5, the CPU 4 of the camera 2 outputs the test pattern image signal to the television 50 via the HDMI output unit 44 while switching the content type information. Further, the camera 2 performs live view shooting of a display image corresponding to the displayed test pattern, and the CPU 4 measures the resolution of the display image displayed on the television 50 based on the acquired captured image for each content type. Then, the CPU 4 can display a display image corresponding to the image signal output from the camera 2 on the television 50 with high image quality by outputting an image signal reflecting the measurement result via the HDMI output unit 44.

  In the above-described embodiment, the connection between the camera 2 and the external display device such as the TV 50 is performed by wire. However, the connection between the camera 2 and the external device such as the TV 50 may be performed wirelessly. Good.

DESCRIPTION OF SYMBOLS 2 ... Camera, 4 ... CPU, 12 ... Image processing MCU, 24 ... Image pick-up element, 34 ... Memory card, 40 ... Display output circuit, 44 ... HDMI output part, 50 ... Television, 54 ... CPU, 56 ... DTV processor, 60 ... Image processing unit, 62 ... Receiving unit

Claims (9)

An output unit for outputting an image signal to an external display device;
A determination unit that determines whether the display image corresponding to the image signal output by the output unit is a type of image signal that is preferably displayed immediately on the external display device;
An electronic apparatus comprising: a switching unit that switches information of a content type that is output in addition to the image signal based on the type. An output unit for outputting an image signal to an external display device;
An imaging unit for imaging a display image displayed on the external display device corresponding to the image signal output by the output unit;
An electronic apparatus comprising: a measurement unit that measures display characteristics based on a captured image acquired by the imaging unit while switching content type information to be output in addition to the image signal. An imaging unit for imaging a display image displayed on the external display device corresponding to the image signal output by the output unit;
A measurement unit that measures display characteristics based on a captured image acquired by the imaging unit while switching content type information to be output in addition to the image signal,
The electronic device according to claim 1, wherein the switching unit switches the content type information based on a measurement result by the measurement unit.   The measurement unit measures a delay amount indicating a time difference between an output time point when the image signal is output by the output unit and the display image corresponding to the image signal, and the output unit includes the external display device. 4. The image signal is output by adding information of a content type with the smallest amount of delay when the image signal is of a type that is preferably displayed immediately. Electronic equipment.   5. The recording control unit according to claim 2, further comprising: a recording control unit configured to associate the display characteristics of the external display device with the content type information and record the information on a recording medium based on a measurement result by the measurement unit. The imaging device according to claim 1.   The electronic device according to claim 1, wherein the output unit outputs an image signal of a pattern image that changes over time.   The electronic device according to claim 1, wherein the output unit outputs the image signal to the external display device via an HDMI interface.   The electronic apparatus according to claim 1, further comprising: an operation unit that instructs a user to switch content type information to be output by being added to the image signal.   9. The electronic apparatus according to claim 1, wherein the image signal of a type that is preferably displayed immediately on the external display device is an image signal of a live view image.

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