JP2012090006A - Video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a BD player 20 to obtain a correct video delay amount when a frame rate for display on a television device 10 is changed after the television device 10 and the BD player 20 is HDMI connected.SOLUTION: A video display device comprises: a video processing unit 13 for converting a frame rate of a video image, input to the television device 10, into a frame rate for display; a video display unit 14 for displaying on a screen a video image output from the video processing unit 13; and an EDID storage unit 18 for storing a video delay amount 18a representing a time lag from the video input to the video display on the screen of the television device 10. When the frame rate for display is changed, the video display device allows the BD player 20 to obtain the video delay amount 18a again, by storing into the EDID storage unit 18 the video delay amount determined based on the frame rate for display after the change, and thereafter by resetting an HDMI transmission path connected to the BD player 20.

Description

  The present invention relates to a video display device, and more particularly to a video display device connected to a video output device including an audio output terminal connected to a speaker via a digital signal transmission cable.

  In HDMI, control information such as LipSync, xyYCC, and DeepColor is supported from HDMI1.3. The control information is stored in an extended display identification data (EDID) ROM (Read Only Memory) on the sink device side such as a television receiver. A source device such as a BD player connected to the sink device acquires control information from the EDIDROM of the sink device, and transmits an optimal signal to the sink device according to the control information. Note that LipSync is information regarding audio delay control, xyYCC is information regarding receivable extended color space, and DeepColor is information regarding receivable color depth.

Here, various techniques are known for voice delay control called so-called LipSync.
In Patent Document 1, a sink device (such as a television receiver) that receives video and audio from a source device (such as a disk recorder) via HDMI displays video on a screen and transmits audio to another external device (such as a television recorder). When outputting to an amplifier, etc., send the delay time calculated based on the delay time of the image displayed on the sink device and the time required for audio transmission to another external device (such as an amplifier). Thus, a technique is disclosed in which audio can be delayed and output so as to be synchronized with the delay of an image by another external device (such as an amplifier).
In Patent Document 2, in order to eliminate the delay caused by the frame synchronizer generated in the output video when the video / audio synchronized with the reference synchronization signal is output by the MPEG2 decoder, the video delay by the built-in frame synchronizer is calculated. A technique for delaying audio output by the calculated video delay amount is disclosed.
In Patent Document 3, in a system configuration in which a video playback device and an audio playback device are separately connected to a network, an audio side clock signal for controlling the decoding timing in the audio playback device is sent to the video playback device via the network. It is disclosed that the video reproduction apparatus adjusts the decode count value in accordance with the audio-side clock signal transmitted from the audio reproduction apparatus.
In Patent Document 4, when playing back a movie or the like, when audio is transmitted to a speaker located away from the video playback location, the audiovisual information is recorded twice at a double speed from the recording medium within a certain period of time The audio data of the video and audio information obtained by the first reading is extracted and transmission to the speaker is started, and the video data of the video and audio information obtained by the second reading is extracted and the video is displayed. A technique for easily synchronizing video and audio by starting the video is disclosed.

WO2008 / 056709 JP 2008-153945 A JP 2009-272945 A JP 2004-201022 A

  However, in the above-described technique, the possibility that the video delay required for video display in a device related to video display is changed for some reason has not been considered.

  The present invention has been made in view of the above-described problem, and in a video display device connected to a video output device, a video delay amount generated when video output from the video output device is displayed on the screen of the video display device. An object of the present invention is to provide a video display device capable of appropriately reflecting the sound output from the video output device to equipment other than the video display device connected to the video output device.

  In order to solve the above-described problem, in the invention according to claim 1 of the present invention, in the video display device connected to the video output device having a digital or analog audio output terminal via a predetermined data communication cable, the video is displayed. A video display unit that converts the frame rate of the video input to the display device into a display frame rate and displays it on the screen, and represents a time lag from video input to video display on the screen in the video display device A video delay amount storage unit storing the video delay amount, and a video delay amount determined based on the changed display frame rate when the display frame rate is changed is stored in the video delay amount storage unit. And then causing the video output device to re-acquire the video delay amount from the video delay amount storage unit via the predetermined data communication cable. And a control unit that performs predetermined control in order, it is constituted with a capital.

  According to this configuration, when the video delay amount is changed by changing the frame rate, the video output amount can be re-acquired by the video output device, so that the video output can be performed at an appropriate timing. The device can always keep the latest video delay amount. Thus, for example, while the video output device is outputting audio to the device connected to the audio output terminal and outputting video to the video display device, the frame rate for display of the video display device Even if the video delay amount is changed due to the change in the video, the video output device can delay and output the audio output to the audio output terminal based on the video delay amount. The video displayed on the screen of the video display device can be synchronized.

  As a selective aspect of the present invention, the video output device and the video display device are compatible with HDMI (registered trademark) (High-Definition Multimedia Interface), the data communication cable is an HDMI cable, and the video The output device and the video display device are connected via the HDMI cable.

  As a selective aspect of the present invention, the video delay amount storage unit is an EDID storage unit that stores EDID (Extended display identification data), and the control unit is configured to connect the video output device and the video display device. In this configuration, the video output amount is re-acquired from the video delay amount storage unit via the predetermined data communication cable by resetting the HDMI transmission path.

  As a selective aspect of the present invention, when the display frame rate is changed by a user operation input, the video display unit changes the video frame rate to the display frame rate changed by the user. The changed video is displayed on the screen, and the control unit stores the video delay amount according to the display frame rate changed by the user in the video delay amount storage unit, and then the video output The apparatus is configured to perform predetermined control for causing the apparatus to re-acquire the video delay amount from the video delay amount storage unit via the predetermined data communication cable.

  As a selective aspect of the present invention, the video display unit displays a display for notifying at least one of the change of the frame rate for display, the rewriting of the video delay amount, and the reset of the HDMI transmission path on the screen. The configuration is to be performed.

  As a selective aspect of the present invention, when a display frame rate is set in the video input to the video display device, the video display unit sets the frame rate of the video in the video. Change to the set display frame rate and display the changed video on the screen, and the control unit sets the video delay amount corresponding to the display frame rate set in the video to the video delay. It is configured to perform predetermined control for causing the video output device to store the video delay amount, and then causing the video output device to re-acquire the video delay amount from the video delay amount storage unit via the predetermined data communication cable.

As an optional aspect of the present invention,
The video display device is a television device connected to a video output device connected to an amplifier via an optical digital cable via an HDMI (registered trademark) (High-Definition Multimedia Interface) cable,
The video delay amount storage unit is an EDID storage unit that stores EDID (Extended display identification data),
The control unit
When the display frame rate is changed by a user operation input, the video display unit changes the video frame rate to the display frame rate changed by the user and displays the changed video on the screen. The control unit stores the video delay amount determined based on the display frame rate changed by the user in the video delay amount storage unit, and then the video display device and the video output by the HDMI cable. Resetting the HDMI transmission path formed with the device to cause the video output device to re-acquire the video delay amount from the video delay amount storage unit;
If a display frame rate is set in the video input to the video display device, the video display unit changes the frame rate of the video to the display frame rate set in the video. The changed video is displayed on the screen, and the control unit stores the video delay amount determined based on the display frame rate set in the video in the video delay amount storage unit, and then Resetting the HDMI transmission path formed between the video display device and the video output device by the HDMI cable to cause the video output device to re-acquire the video delay amount from the video delay amount storage unit;
The video display unit is configured to display on the screen at least one of changing the frame rate for display, rewriting the video delay amount, and resetting the HDMI transmission path.

As described above, according to the present invention, in the video display device connected to the video output device, the video delay amount generated when the video output from the video output device is displayed on the screen of the video display device has been changed. Even in this case, a video display device capable of appropriately reflecting the video delay amount after the change to the audio output from the video output device to equipment other than the video display device connected to the video output device Can be provided.
According to the invention of claim 2, the present invention can be realized by HDMI.
According to the invention of claim 3, the video output device can easily acquire the video delay amount changed according to the change of the frame rate.
According to the fourth aspect of the present invention, it is possible to cause the video output device to appropriately acquire the video delay amount that is changed according to the frame rate that is changed by the user's operation input.
According to the fifth aspect of the present invention, it is possible to notify the user of the screen disturbance that occurs with the change in the video delay amount.
According to the sixth aspect of the invention, it is possible to cause the video output device to appropriately acquire the video delay amount that is changed in accordance with the change in the frame rate instructed in the video.
According to the seventh aspect of the present invention, when the default frame rate is changed, the video output device can acquire an appropriate video delay amount.
According to the eighth aspect of the invention, it is possible to cause the video output device to acquire an appropriate video delay amount even when the frame rate is temporarily changed.
Needless to say, in a more specific configuration as in claim 9, the same effects as those of the inventions in claims 1 to 8 described above are achieved.

It is a block diagram which shows the structure of the HDMI network concerning embodiment. It is a block diagram which shows the structure of a television apparatus. It is a block diagram which shows the structure of a BD player. It is a flowchart which shows the flow of a video delay amount update process.

Hereinafter, embodiments of the present invention will be described in the following order.
(1) Configuration of the present embodiment:
(2) Video delay amount update processing:
(3) Summary:

(1) Configuration of the present embodiment:
First, with reference to FIG. 1, the structure of the home theater system comprised including the video display apparatus concerning this embodiment is demonstrated. In the home theater system 100 shown in the figure, a television device 10 as a sink device and a BD player 20 as a source device are connected via an HDMI (registered trademark) (High-Definition Multimedia Interface) cable C1. The player 20 and the amplifier 30 are connected by an optical digital cable C2.

  The BD player 20 can communicate with the television device 10 via the HDMI cable C1 in conformity with the HDMI standard, and a storage medium such as a BD (Blue Ray Disc), a DVD (Digital Versatile Disc), or a CD (Compact Disc). The video data and audio data read from can be transmitted to the television apparatus 10 and CEC commands can be transmitted and received. When the video data is input from the BD player 20, the television apparatus 10 displays (reproduces) the video on the screen based on the video data. That is, in the present embodiment, the television device 10 constitutes a video display device, and the BD player 20 constitutes a video output device. In the present embodiment, the HDMI cable C1 constitutes a predetermined data communication cable.

  The BD player 20 is connected to the amplifier 30 via an optical digital cable C2 such as SPDIF, and can output audio data read from the BD to the amplifier 30. When audio data is input from the BD player 20, the speaker 40 reproduces audio based on the audio data. In the present embodiment, the cable connecting the BD player 20 and the amplifier 30 is the optical digital cable C2. However, an analog cable may of course be used. The output digital audio output terminal 25 is also an analog audio output terminal, and an audio output circuit or the like is appropriately disposed.

Note that the video display device may be any device as long as it can display a video reproduced based on video data input from the outside, such as a liquid crystal television device or a plasma television device. That is, a display device such as a liquid crystal display device or a plasma display without a television function may be used. In addition, the video display device itself may not have a function of displaying video, for example, a device that displays an image on the other display by driving another display externally connected to the video display device. It may be.
The cable connecting the BD player 20 and the amplifier 30 may be connected by any cable except for a cable such as an HDMI cable compatible with LipSync, and may be another digital communication cable such as a coaxial cable. It may be a cable for analog communication.

  Next, the electrical configuration of the television apparatus 10 will be described with reference to FIG. The television device 10 performs various image processing on the video data, a control unit 11 that controls the entire television device 10, a television broadcast reception unit 12 that receives a television broadcast and extracts video data and audio data, and the like. A video processing unit 13, a video display unit 14 for displaying video based on video data on a screen, a non-volatile memory 15, an operation unit 16 for a user to input various operations to the television device 10, An HDMI receiver 17 and an EDID storage unit 18 are provided.

  The television broadcast receiving unit 12 extracts video data and audio data corresponding to the user's selected channel from the television broadcast received via an antenna or the like and outputs them. The television broadcast received by the television broadcast receiving unit 12 may be any type, and examples include terrestrial analog broadcast, terrestrial digital broadcast, satellite broadcast, and cable television broadcast. The TV broadcast receiving unit 12 outputs video data to the video processing unit 13 and outputs audio data to an optical digital audio output terminal (not shown) or to an audio output circuit (not shown) to output a speaker or an analog audio output terminal. To output.

  The nonvolatile memory 15 is composed of, for example, a magnetic recording medium, an optical recording medium, or a semiconductor memory. The non-volatile memory 15 stores setting data of various settings that can be set from the menu screen of the television device 10, for example, a frame rate setting 15 a. The frame rate setting 15a is a frame rate of an image displayed on the screen of the image display unit 14, and can be set to 1 (60 Hz), 2 (120 Hz), 4 (240 Hz), for example. The frame rate setting 15a is referred to when the FRC unit 13a described later performs frame rate control. The frame rate setting 15a can be changed, for example, by displaying the above-described menu screen and allowing the user to perform a predetermined operation input on the operation unit 16.

  In the video processing unit 13, the video data extracted from the television broadcast by the television broadcast receiving unit 12 and the video data received by the HDMI receiver 17 are input to the video processing unit 13. The video processing unit 13 performs various kinds of image processing on the video data and outputs them to the video display unit 14. Here, the video processing unit 13 includes at least a frame rate control unit 13a (FRC unit 13a) and an on-screen display unit 13b (OSD unit 13b) as a configuration for performing image processing.

  The FRC unit 13a performs processing for adapting the frequency (Hz) of the input video data to the frequency (Hz) of the video to be output. The frequency of the video to be output is set by the frame rate setting 15a of the nonvolatile memory 15, the frame rate setting set in the video data, the frame rate setting specified by a predetermined command from an external device, etc. The

  The FRC unit 13a buffers a predetermined number of frames from the input video data in the FRC memory 13a1, and performs frame replenishment and thinning so as to conform to the frame rate (Hz / fps) of the video to be output. For example, it is assumed that one of FRC frequency can be selected from 1 time (60 Hz), 2 times (120 Hz), and 4 times (240 Hz). At this time, if the input video data is 60 fps and the frame rate setting is 1 time (60 Hz), it is not necessary to replenish the frame, so that it can be considered that there is almost no delay due to FRC. On the other hand, when the input video data is 60 fps and the frame rate setting is 4 times (240 Hz), for example, a process of supplementing 3 frames is required to change 1 frame to 4 frames. The process of replenishing this frame causes a video delay. The video delay amount generated by the FRC can be obtained by a table or a calculation formula according to the combination of the frame rate of the input video data and the frame rate of the output video.

  The OSD unit 13b, for example, in accordance with a control signal input from the control unit 11, an OSD signal for causing the video display unit 14 to perform a predetermined OSD display (on-screen display display), a television broadcast receiving unit 12, an HDMI receiver 17, etc. Are combined (superimposed) on the video data output to the video processing unit 13.

  The video display unit 14 displays a video on the screen of the television device 10 based on the video data output from the video processing unit 13. The video display unit 14 includes a display and a display driver for driving the display. The display driver drives the display based on the video data input to the video display unit 14 so that the video is displayed on the screen. The That is, the television broadcast video of the channel selected by the user is displayed on the screen of the video display unit 14, or the video input from the BD player 20 via the HDMI cable C1 is displayed on the screen.

  The HDMI receiver reproduces video data and audio data based on stream data input via the HDMI cable C1.

  The EDID storage unit 18 is a non-volatile storage medium for storing EDID (Extended display identification data). The EDID storage unit 18 stores information related to the performance of the television device 10. For example, a corresponding image format (RGB, YCbCr4: 4: 4, YCbCr4: 2: 2 etc.) or video is displayed as a video display unit. The video delay amount 18a indicating the time required for display on the 14 screen is stored. In the present embodiment, the EDID storage unit 18 constitutes a video delay amount storage unit.

  Next, the configuration of the BD player will be described with reference to FIG. As shown in the figure, the BD player 20 includes a control unit 21 that controls the entire BD player, a disk drive 22 that reads data from a storage medium such as a BD, a DVD, and a CD, and data that is output from the disk drive 22. Is subjected to processing according to a predetermined file format (for example, MPEG2 (Moving Picture Experts Group phase 2) format), thereby separating the television broadcast signal into audio data and video data and decoding the data. An HDMI transmitter 24 and a digital audio output terminal 25 such as SPDIF (Sony Philips Digital Interface).

  The control unit 21 can perform communication conforming to the HDMI standard with other devices connected via the HDMI cable via the HDMI interface. For example, in FIGS. 1 and 2, the control unit 21 is connected to the television apparatus 10, and can acquire the video delay amount 18 a and the SUM value 18 b stored in the EDID storage unit 18 of the television apparatus 10. The control unit 21 acquires the video delay amount 18a and the SUM value when the BD player 20 is connected to the television device 10 based on the HDMI standard.

  The HDMI transmitter 24 converts video and audio data into stream data having a predetermined data structure defined by the HDMI standard, and outputs the stream data via the HDMI cable C1. Specifically, the HDMI transmitter 24 converts the video data reproduced by the data reproducing unit 23 into stream data having a predetermined data structure defined by the HDMI standard, and outputs the stream data to the television apparatus 10 via the HDMI cable C1. To do. Then, the HDMI receiver 17 on the television device 10 side receives this, and restores the video data from the stream data.

  The data reproducing unit is connected to the amplifier 30 via an optical digital audio output terminal such as SPDIF, and the audio data read by the data reproducing unit 23 from the disk-shaped recording medium set in the disk drive 22 is output to the amplifier 30. can do. At that time, the data reproducing unit 23 can delay and output the sound in accordance with the control of the control unit 21. For example, when reproducing the video and audio data read from the disk drive 22 in the BD player 20, when the video based on the video data is displayed on the television device 10 and the audio based on the audio data is reproduced on the amplifier 30, The control unit 21 delays the audio data output to the amplifier 30 based on the video delay amount acquired from the television apparatus 10. However, as described above, the control unit 21 performs the process of acquiring the video delay amount 18a and the SUM value 18b from the EDID storage unit 18 only immediately after the device is HDMI-connected. Therefore, if the video delay amount is changed after the HDMI connection, it is impossible to accurately output the delay of the audio data. In order to solve such a problem, a process for correctly setting the video delay amount in the BD player 20 will be described below.

(2) Video delay amount update processing:
FIG. 4 is a flowchart showing the flow of the video delay amount update process executed by the control unit 11. The video delay amount update process is repeatedly executed in the control unit 11 at a predetermined cycle.

  In the video delay amount update process, first, it is determined whether or not a trigger event for changing the video delay amount 18a has occurred (S100). The trigger event in the present embodiment is an event that causes a change in the frequency of FRC (Frame Rate Control). For example, when the user performs a predetermined operation on the operation unit 16, a setting change related to the frequency of the FRC, the HDMI cable C1 And the frequency of the FRC is set in the video signal input from the other video data input terminal (not shown). When not detecting the trigger event, the control unit 11 once ends the video delay amount update process (S100: No).

  When the trigger event is detected (S100: Yes), the control unit 11 acquires the video delay amount 18a changed by the trigger event (S110). First, the control unit 11 acquires the changed frequency of the FRC. Next, the video delay amount generated by the changed FRC is acquired from a table or based on a calculation formula, and further factors other than the FRC (delays generated in other processes of the video processing unit 13, each transmission path, etc.) The video delay amount 18a generated in the video finally displayed on the screen of the video display unit 14 is acquired in consideration of the video delay generated by the above.

  Next, the control unit 11 creates a SUM value 18b of the acquired video delay amount 18a (S120). This SUM value 18b is a checksum, and is a value for the device that has acquired the video delay amount 18a to check whether there is a data error in the video delay amount 18a.

  Next, the control unit 11 rewrites and stores the video delay amount 18a and the SUM value 18b in the EDID storage unit 18 with the values created in step S120 (S130). When the external device outputs the video data to the television apparatus 10 and outputs the audio data to another device, the external device accesses the EDID storage unit 18 via the HDMI cable C1 and acquires the video delay amount 18a. By delaying the output timing of the audio data according to the video delay amount 18a, the timing at which the video data is reproduced and the timing at which the audio data is reproduced can be matched. At this time, the video delay amount 18a functions as a so-called LipSync.

  Next, the control unit 11 resets the HDMI transmission path formed between the television device 10 and the BD player 20 (S140). When the HDMI transmission path is reset, the BD player 20 re-acquires the EDID stored in the EDID storage unit 18 by transmitting a predetermined CEC command to the television device 10 via the HDMI cable C1. When the BD player 20 re-acquires the video delay amount 18a, the BD player 20 secures a buffer necessary for causing the audio to generate a delay corresponding to the video delay amount 18a. Then, the BD player 20 uses the buffer to delay the audio output timing when executing the audio output. Thus, the video and audio output timing can be optimized.

  In addition, when the video delay amount update process is executed while the video input via HDMI is being displayed on the television device 10 (while the user is viewing), it is preferable to display that fact on the screen. This is because when the video delay amount 18a is changed or the HDMI transmission path is reset, the video and audio are affected. For example, when a video is displayed on the screen based on the video data input from the BD player 20, by controlling the OSD unit 13b, a notification image indicating that the video or audio is disturbed is synthesized with the video. (Superimpose). This improves usability.

(3) Summary:
According to the embodiment described above, in the television device 10 connected to the BD player 20 including the digital audio output terminal 25 via the HDMI cable C1, the frame rate of the video input to the television device 10 is displayed. Video processing unit 13 for converting to the frame rate of the video, video display unit 14 for displaying video output from the video processing unit 13 on the screen, and video representing the time lag from video input to video display on the television device 10 The EDID storage unit 18 storing the delay amount 18a, and the video delay amount determined based on the changed display frame rate when the display frame rate is changed are stored in the EDID storage unit 18; By resetting the HDMI transmission path connected to the BD player 20, the video delay amount 18a is reduced to the BD player. To be re-acquired ya 20. Therefore, even if the display frame rate of the television device 10 changes after the television device 10 and the BD player 20 are HDMI-connected, it is possible to cause the BD player 20 to acquire the correct video delay amount. The audio output from the digital audio output terminal 25 by the BD player 20 can be output with a correct delay amount.

Needless to say, the present invention is not limited to the above embodiments. It goes without saying for those skilled in the art,
・ Applying mutually interchangeable members and configurations disclosed in the above embodiments by appropriately changing the combination thereof.− Although not disclosed in the above embodiments, it is a publicly known technique and the above embodiments. The members and configurations that can be mutually replaced with the members and configurations disclosed in the above are appropriately replaced, and the combination is changed and applied. It is an embodiment of the present invention that a person skilled in the art can appropriately replace the members and configurations that can be assumed as substitutes for the members and configurations disclosed in the above-described embodiments, and change the combinations and apply them. It is disclosed as.

  DESCRIPTION OF SYMBOLS 10 ... Television apparatus, 11 ... Control part, 12 ... Television broadcast receiving part, 13 ... Video processing part, 13a ... FRC part, 13a ... Frame rate control part, 13b ... On-screen display part, 13a1 ... FRC memory, 14 ... Image display unit, 14 ... Television apparatus, 15 ... Non-volatile memory, 15a ... Frame rate setting, 16 ... Operation unit, 17 ... HDMI receiver, 18 ... EDID storage unit, 20 ... BD player, 21 ... Control unit, 22 ... Disc drive, 23 ... data reproduction unit, 24 ... HDMI transmitter, 25 ... digital audio output terminal, 30 ... amplifier, 40 ... speaker, 100 ... home theater system, C1 ... HDMI cable

Claims (7)

In a video display device connected to a video output device having a digital or analog audio output terminal via a predetermined data communication cable,
A video display unit that converts the frame rate of the video input to the video display device into a frame rate for display and displays it on the screen;
A video delay amount storage unit storing a video delay amount representing a time lag from video input to video display on the screen in the video display device;
When the display frame rate is changed, the video delay amount determined based on the changed display frame rate is stored in the video delay amount storage unit, and then the predetermined data is stored in the video output device. A control unit that performs predetermined control to re-acquire the video delay amount from the video delay amount storage unit via a communication cable;
A video display device comprising: The video output device and the video display device support HDMI (registered trademark) (High-Definition Multimedia Interface),
The data communication cable is an HDMI cable,
The video display device according to claim 1, wherein the video output device and the video display device are connected via the HDMI cable. The video delay amount storage unit is an EDID storage unit that stores EDID (Extended display identification data),
The control unit resets the HDMI transmission path between the video output device and the video display device, whereby the video output device stores the video delay amount from the video delay amount storage unit via the predetermined data communication cable. The video display device according to claim 2, wherein the delay amount is reacquired.   When the display frame rate is changed by a user operation input, the video display unit changes the video frame rate to the display frame rate changed by the user and displays the changed video on the screen. The control unit stores the video delay amount determined based on the display frame rate changed by the user in the video delay amount storage unit, and then connects the predetermined data communication cable to the video output device. 4. The video display device according to claim 2, wherein predetermined control for re-acquiring the video delay amount from the video delay amount storage unit is performed.   5. The display device according to claim 2, wherein the video display unit displays on the screen at least one of a change in the display frame rate, a rewrite of the video delay amount, and a reset of the HDMI transmission path. The video display device according to claim 1.   If a display frame rate is set in the video input to the video display device, the video display unit changes the frame rate of the video to the display frame rate set in the video. The changed video is displayed on the screen, and the control unit stores the video delay amount determined based on the display frame rate set in the video in the video delay amount storage unit, and then The predetermined control for making the said video output device reacquire the said video delay amount from the said video delay amount memory | storage part via the said predetermined data communication cable is given in any one of Claims 1-5. Video display device. The video display device is a television device connected to a video output device connected to an amplifier via an optical digital cable via an HDMI (registered trademark) (High-Definition Multimedia Interface) cable,
The video delay amount storage unit is an EDID storage unit that stores EDID (Extended display identification data),
The control unit
When the display frame rate is changed by a user operation input, the video display unit changes the video frame rate to the display frame rate changed by the user and displays the changed video on the screen. The control unit stores the video delay amount determined based on the display frame rate changed by the user in the video delay amount storage unit, and then the video display device and the video output by the HDMI cable. Resetting the HDMI transmission path formed with the device to cause the video output device to re-acquire the video delay amount from the video delay amount storage unit;
If a display frame rate is set in the video input to the video display device, the video display unit changes the frame rate of the video to the display frame rate set in the video. The changed video is displayed on the screen, and the control unit stores the video delay amount determined based on the display frame rate set in the video in the video delay amount storage unit, and then Resetting the HDMI transmission path formed between the video display device and the video output device by the HDMI cable to cause the video output device to re-acquire the video delay amount from the video delay amount storage unit;
2. The video display device according to claim 1, wherein the video display unit displays on the screen at least one of a change in the frame rate for display, rewriting of the video delay amount, and resetting of the HDMI transmission path. .

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