WO2019031308A1

WO2019031308A1 - Display device, television receiver, video processing method, control program, and recording medium

Info

Publication number: WO2019031308A1
Application number: PCT/JP2018/028658
Authority: WO
Inventors: 慎司中川
Original assignee: シャープ株式会社
Priority date: 2017-08-09
Filing date: 2018-07-31
Publication date: 2019-02-14

Abstract

A television receiver (3) is provided with: a display unit (34); a video signal acquisition unit (31) which acquires, via individual transfer paths video, signals of videos respectively displayed in a plurality of display regions in the display unit; a skew estimation unit (32) which estimates a skew amount that is a time lag between the video signals in the plurality of display regions, and a display control unit (33) which causes the display unit to display the estimated skew amount.

Description

Display device, television receiver, video processing method, control program, and recording medium

The present invention relates to a display device for displaying a plurality of images as a single large image, and a television receiver.

In a television receiver having a high resolution such as 8K (hereinafter referred to as "television"), a plurality of videos (for example, 4K video etc.) are obtained from the video output device via a plurality of input cables, There is a technology for displaying a plurality of images as one large image. In that case, in the television, the acquisition timing of the video data, and hence the display timing may be shifted between the plurality of input cables.

Therefore, before the video data is output to the television, temporarily store the video data in the buffer, then check the start timing of the video data for each frame, and combine the other video data with the latest video data. Thus, the deviation in display timing on the television is adjusted.

An image display apparatus described in Patent Document 1 can be mentioned as an example of a technique for adjusting the above-described display timing shift.

Japanese Patent Publication "Patent No. 3703283" (released on September 07, 1999)

However, when an intermediate device such as an audio amplifier intervenes in a specific input cable among a plurality of input cables between the video output device and the television, a delay of video data in the specific input cable occurs. The delay amount may exceed the time for one frame. In that case, there is a problem that the normal display can not be performed because the delay amount between the input cables can not be known only by looking at the start timing of the video data for each frame.

Although there is also a method of using a specific test pattern to confirm a delay across frames, it is complicated because it is necessary to prepare a dedicated video.

An aspect of the present invention is directed to adjusting a temporal shift between a plurality of images.

In order to solve the above problems, a display device according to one aspect of the present invention includes a display unit, and video signals of images displayed by each of a plurality of display areas in the display unit via individual transmission paths. Display for causing the display unit to display the video signal acquisition unit to be acquired, a skew estimation unit that estimates a skew amount that is a temporal shift of the video signal in the plurality of display regions, and the skew amount estimated by the skew estimation unit And a control unit.

In order to solve the above problems, a display device according to one aspect of the present invention includes a display unit, and video signals of images displayed by each of a plurality of display areas in the display unit via individual transmission paths. Device identification information indicating a video signal acquisition unit to be acquired and a device connected to the video signal acquisition unit via the individual transmission path, and a skew amount that is a temporal shift of the video signal in the plurality of display areas The skew amount of the video signal corresponding to each display area is referred to with reference to a storage unit that associates and stores a skew adjustment parameter for adjusting the skew and the skew adjustment parameter associated with the device identification information. And a skew adjustment unit to adjust.

In order to solve the above problems, a video processing method according to an aspect of the present invention is a video processing method performed by a display device including a display unit, and each of a plurality of display areas in the display unit is An image signal acquisition step of acquiring an image signal of an image to be displayed through an individual transmission path; device identification information indicating a device connected to the display device through the individual transmission path; A storage process for storing a skew adjustment parameter for adjusting a skew amount which is a temporal shift of the video signal in the display area in association with each other, and referring to the skew adjustment parameter associated with the device identification information. And a skew adjustment step of adjusting the skew in each display area.

According to one aspect of the present invention, it is possible to adjust a temporal shift between a plurality of images.

FIG. 1A is a view showing an example of the arrangement of a video system according to the first embodiment of the present invention. FIGS. 1 (b) to 1 (d) are diagrams showing skews between four video frames at each timing according to the present embodiment. It is a figure which shows the principal part structure of the television which concerns on Embodiment 1 of this invention. It is a figure which shows a process of the skew adjustment apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the limit of the skew adjustment process which concerns on Embodiment 1 of this invention. It is a figure which shows the structural example of the imaging | video system which concerns on Embodiment 1 of this invention. It is a figure which shows the input imaging | video of the television which concerns on Embodiment 1 of this invention, and a display imaging | video. It is a block diagram which shows the structure of the television receiver which concerns on Embodiment 2 of this invention. It is a flowchart figure explaining the image processing method by the skew adjustment apparatus concerning Embodiment 2 of this invention. (A) And (b) is a conceptual diagram explaining the image processing method by the skew adjustment apparatus which concerns on Embodiment 2 of this invention. (A) And (b) is a conceptual diagram explaining the image processing method by the skew adjustment apparatus which concerns on Embodiment 3 of this invention.

Embodiment 1
(Configuration of the video system 100)
Hereinafter, the basic configuration of the video system 100 according to an embodiment of the present invention will be described in detail. FIG. 1A is a view showing a configuration example of a video system 100 according to the present embodiment. FIGS. 1 (b) to 1 (d) are diagrams showing skews (time difference or phase difference) between four video frames at each timing according to the present embodiment. The horizontal axes in FIGS. 1 (b) to 1 (d) are time axes.

As shown in FIG. 1A, the video system 100 includes a video output device 1, a skew adjustment device 2, and a television receiver (display device) 3. The video output device 1 and the skew adjustment device 2 are connected via four cables 4. The skew adjustment device 2 and the television receiver 3 are connected via four video signal transmission paths 5.

The video output device 1 acquires 8K video data by 8K advanced BS broadcasting and the like, divides the data into four 4K video data, and transmits four 4K video data via the four cables 4. Transmit to the skew adjustment device 2. The skew adjustment device 2 acquires four 4K video data from the video output device 1 and adjusts the skew between the video data, and then the four 4K video data are divided into four video signals. It is output to the television receiver 3 via the transmission path 5. The television receiver 3 receives the skew-adjusted 4K video data from the skew adjustment device 2 and displays the data. The four cables 4 and the four video signal transmission paths 5 are, for example, cables of the HDMI (registered trademark) 2.0 standard, but are not limited thereto. Each cable 4 and each video signal transmission path 5 can transmit only 4K video.

Here, the number of the video signal transmission paths 5 is not particularly limited. Moreover, a cable etc. are mentioned as an example of the video signal transmission line 5. Although the skew adjustment device 2 is provided outside the television receiver 3 in (a) of FIG. 1, the skew adjustment device 2 may be built in the television receiver 3. In that case, the video signal transmission path 5 may be a wiring or the like on the substrate. The number of wirings on the substrate is not particularly limited, and a plurality of wirings may be grouped or separated.

As shown in FIG. 1B, in the 8K video acquired by the video output device 1, the start timing of each frame of the upper left video, the upper right video, the lower left video, and the lower right video matches, and there is no skew. It is in the state. Here, the upper left image, the upper right image, the lower left image, and the lower right image indicate images displayed by the four display areas of the television receiver 3.

Next, as shown in FIG. 1C, the 4K video acquired by the skew adjustment device 2 is the upper right video, the lower left video, and the lower right video with respect to the start timing of the frame of the upper left video serving as a reference. The start timing of each frame is shifted. That is, a skew is present.

Then, as shown in FIG. 1 (d), the 4K video outputted by the skew adjustment device 2 and acquired by the television receiver 3 is each frame of the upper left video, the upper right video, the lower left video, and the lower right video. The start timing of is the same and the skew is adjusted.

(Configuration of the television receiver 3)
FIG. 2 is a diagram showing the main configuration of the television receiver 3 according to the present embodiment. As shown in FIG. 2, the television receiver 3 includes at least a video signal acquisition unit 31, a skew estimation unit 32, a display control unit 33, and a display unit 34.

The video signal acquisition unit 31 acquires the video signal of the video displayed by each of the plurality of display areas in the display unit 34 through the individual video signal transmission path 5 (transmission path). The skew estimation unit 32 estimates a skew amount which is a temporal shift of video signals in a plurality of display areas. The display control unit 33 causes the display unit 34 to display the skew amount estimated by the skew estimation unit 32. The display unit 34 is a screen that displays an image and a skew amount. The skew amount estimation and display processing will be described separately.

When the skew adjustment device 2 is built in the television receiver 3, the television receiver 3 has a function corresponding to the skew adjustment device 2, that is, the video signal acquisition unit 31 and the skew estimation unit 32. Alternatively, it may be provided between the skew estimation unit 32 and the display control unit 33.

(Process of skew adjustment device 2)
The process of the skew adjustment device 2 will be described with reference to FIGS. FIG. 3 is a diagram showing processing of the skew adjustment device 2 according to the present embodiment. The skew adjustment device 2 temporarily stores all input images that may have skew in a memory (for example, an SRAM or the like). Then, the skew adjustment device 2 reads all the input video from the memory at the timing when the video input at the latest timing starts to be stored in the memory. In FIG. 3, the horizontal axis is a time axis, the rectangle of “upper left image 1 in” indicates the timing when upper left image 1 is stored in the memory, and the rectangle of “upper left image 1 out” indicates that upper left image 1 is a memory (In the same manner as the video in other display areas).

As shown in FIG. 3, with reference to the memory storage timing of the upper left video 1 in, the memory storage timing of the lower left video 1 in and the lower right video 1 in is advanced, and the memory storage timing of the upper right video 1 in is delayed. Therefore, the skew adjustment device 2 reads four videos from the memory in accordance with the “upper right video 1 out” at which the upper right video 1 stored in the memory becomes readable at the latest timing.

In the skew adjustment device 2, the larger the amount of skew is, that is, the video input at the earliest timing (lower left video 1 in FIG. 3) and the video input at the latest timing (upper right video 1 in FIG. 3). The larger the time difference with, the more memory capacity is required to store video. Memory capacity is directly linked to cost. Therefore, the memory cost increases because it is necessary to increase the memory capacity in order to adjust a large amount of skew.

FIG. 4 is a diagram showing the limit of the skew adjustment process according to the present embodiment. In the skew adjustment device 2, even if the memory capacity is greatly increased, the skew can not be correctly adjusted for an image in which a skew amount of 0.5 frames or more exists. This means that there is no way to distinguish whether the input video shifted by 0.5 frame from the reference video is "input video delayed by 0.5 frame" or "input video earlier by 0.5 frame" It is from.

As shown in FIG. 4, the upper right image 1in is delayed by 0.7 frame from the reference upper left image 1in. However, each video does not have information (for example, a frame number) indicating the order of the frames. Therefore, the skew adjustment device 2 delays the upper right image corresponding to the upper left image 1 in by 0.7 frame if it is the upper right image 0 in advanced by 0.3 frames, based on the upper left image 1 in It can not be judged whether it is the upper right image 1in. In such a case, the skew adjusting device 2 may erroneously recognize that the upper right image 0in with the smallest amount of skew is the upper right image corresponding to the reference upper left image 1in as the most reliable skew adjustment result. is there.

Also, the lower left image 1in is advanced by 0.9 frames from the reference upper left image 1in. However, each video has no information indicating the order of frames. Therefore, the skew adjustment device 2 delays the upper left image corresponding to the upper left image 1 in by 0.1 frame or 0.1 frame if the upper left image corresponding to the upper left image 1 in is 0.9 frames ahead, based on the upper left image 1 in It can not be judged whether it is the lower left image 2in. In such a case, the skew adjusting device 2 may erroneously recognize that the lower left image 2in with the smallest amount of skew is the lower left image corresponding to the reference upper left image 1in as the most reliable skew adjustment result. is there.

As a result, as shown in FIG. 4, although the output timing of the video is uniform, the upper right video and the lower left video become a video shifted by one frame from the reference upper left video.

FIG. 5 is a view showing a configuration example of the video system 101 according to the present embodiment. The television receiver 3 shown in FIG. 5 may incorporate the skew adjustment device 2 shown in each of the above configuration examples. The problem to be solved by the configuration of the television receiver 3 shown in FIG. 5 is mainly the problem in the configuration example of the video system 101.

As shown in FIG. 5, the video system 101 includes a video output device 1, a skew adjustment device 2, a television receiver 3, a home theater system 6, and a speaker system 7. The video output device 1, the skew adjustment device 2, and the television receiver 3 are the same as those described with reference to FIG. However, the video output device 1 superimposes high-quality multi-channel audio data on data of 4K video using one cable 4 and transmits it to the home theater system 6.

The home theater system 6 is interposed between the video output device 1 and the skew adjustment device 2. The home theater system 6 acquires 4K video data and audio data from the video output device 1 through one cable 4, extracts audio data, and outputs the audio data to the speaker system 7. The speaker system 7 is connected to the home theater system 6, and acquires and outputs audio data from the home theater system 6.

The home theater system 6 extracts audio data from one cable 4 and outputs 4K video data to the skew adjustment device 2. In this case, it is assumed that the 4K video output from the home theater system 6 has a skew amount from the other 4K video for the time taken to extract the audio data. In such a case, it is desirable to adjust the amount of skew by a method other than selecting an image with the smallest amount of skew.

Further, the present invention is not limited to the home theater system 6, and another device (distributor, VR glass, etc.) may be connected between the video output device 1 and the skew adjustment device 2.

(Processing of the television receiver 3)
In the television receiver 3, the video signal acquisition unit 31 acquires four video signals representing 4K video from the skew adjustment device 2 through the four video signal transmission paths 5. The skew estimation unit 32 detects a characteristic image common to the four video data, and estimates a skew amount (temporal shift) between a video signal as a reference and another video signal. For example, the skew estimation unit 32 measures APL (Average Picture Level) of each frame continuously for a predetermined time, and stores it in a memory to store characteristic images such as whiteout and blackout. To detect. Next, the skew estimation unit 32 estimates the amount of skew by comparing the display timings of characteristic images. The skew estimation unit 32 may be configured to estimate the amount of skew by comparing pixel values across the boundary of the display area instead of APL.

FIG. 6 is a view showing input video and display video of the television receiver 3 according to the present embodiment. 6A to 6C show output images of the video output device 1. Here, in order to facilitate the explanation, an example is shown in which an image in which the whitened-out image continues for two frames shown in FIGS. 6 (b) and 6 (c) is shown after the blacked-out image shown in FIG. There is.

FIGS. 6 (d) to 6 (f) show input images of the skew adjustment device 2 and correspond to the images of FIGS. 6 (a) to 6 (c), respectively. An example is shown in which only the lower right image is delayed by one frame because a device for enlarging the skew is inserted between the video output device 1 and the skew adjustment device 2 as in the home theater system 6 shown in FIG. ing. Here, when the skew adjustment is not performed by the skew adjustment device 2, FIGS. 6 (d) to 6 (f) show the input image of the television receiver 3 as it is.

6G to 6I show display examples of the television receiver 3 on which the skew information is superimposed by the display control unit 33. Since the transition from the blackout video to the whiteout video is delayed by one frame only for the lower right video, the skew estimation unit 32 sets the skew amount of the lower right video to -1 with respect to the reference (upper left video). presume. The display control unit 33 superimposes the estimation result on the input images (d) to (f) of the television receiver 3.

The display control unit 33 may display the skew amount estimated by the skew estimation unit 32 together with the image represented by the video signal and the image adjusted by the skew amount.

(Effect of Embodiment 1)
Since human beings can recognize the displacement of the image, the television receiver 3 displays the estimated amount of skew when there is a system that can adjust the skew manually (for example, by remote control operation). , Can help manually adjust the skew.

In addition, the television receiver 3 can clearly display a skewed image by displaying the skew amount estimated by the skew estimation unit 32 on the display unit 34 together with the image represented by the video signal.

Furthermore, since the television receiver 3 displays the skew amount estimated by the skew estimation unit 32 together with the image represented by the video signal and the image adjusted by the skew amount, the television receiver 3 is adjusted by the skew amount. It can indicate whether the image is correct or not.

Second Embodiment
In the technology of displaying a plurality of images as one large image as in the above-described background art, an example of the cause of the occurrence of the display timing deviation will be described below. For example, when an intermediate device such as an audio amplifier intervenes in a specific input cable among a plurality of input cables between the video output device and the television, a delay of video data in the specific input cable may occur. Therefore, when the intermediate device interposed in the transmission path of the video signal is changed, it is necessary to correct the delay of the video data caused by the change of the intermediate device each time.

One aspect of the present invention has been made in view of the above problems, and an object thereof is to efficiently adjust a temporal shift between video data due to an intermediate device being intervened in a transmission path. To aim.

The second embodiment of the present invention is described below with reference to the drawings. Also in the present embodiment, the video system 100 and the video system 101 according to the first embodiment can be used similarly. Therefore, for convenience of explanation, the description of members having the same functions as the members described in the above embodiment will be omitted.

(Principal Configuration of Television Receiver 3 Featuring the Second Embodiment)
Below, the principal part structure of the television receiver 3 which concerns on this embodiment is demonstrated with reference to FIG. FIG. 7 is a block diagram showing a configuration example of the skew adjustment device 2 and the television receiver 3 according to the present embodiment. Note that the television receiver 3 shown in FIG. 7 may incorporate the skew adjustment device 2 shown in each of the above configuration examples. Further, the problems to be solved by the configuration of the television receiver 3 shown in FIG. 7 are mainly the problems in the configuration example of the video system 101 shown in FIG.

As illustrated in FIG. 7, the skew adjustment device 2 includes an acquisition unit 11 (corresponding to a video signal acquisition unit in claims), a calculation unit 12 and an adjustment unit 13 (corresponding to a skew adjustment unit in claims) included in the processing unit 10. And a storage unit 14. The television receiver 3 further includes a display control unit 15 and a display unit 16.

The acquisition unit 11 acquires video signals of video images respectively displayed by a plurality of display areas in the display unit 16 via individual transmission paths. The individual transmission path in this case corresponds to the transmission path from the video output device 1 in FIG. 5 described above to the skew adjustment device 2 via the four cables 4.

In addition, the acquisition unit 11 acquires device identification information indicating a device connected via the above-described individual transmission path via the individual transmission path. Here, the devices connected through the individual transmission paths correspond to the video output device 1 or the home theater system 6 in FIG. 5 described above.

The calculation unit 12 calculates skew adjustment parameters corresponding to each video signal with reference to the plurality of video signals acquired by the acquisition unit 11. Here, the skew adjustment parameter indicates a parameter for adjusting a skew amount which is a temporal shift between video signals which are referred to when displaying each video in the plurality of display areas described above.

The storage unit 14 associates and stores the device identification information acquired by the acquisition unit 11 and the skew adjustment parameter calculated by the calculation unit 12.

When the adjustment unit 13 acquires from the acquisition unit 11 the same device identification information as the device identification information stored in the storage unit 14, the adjustment unit 13 refers to the skew adjustment parameter that is associated with the device identification information. The skew amount of the video signal (video signal accompanying the device identification information) is adjusted. Then, the adjustment unit 13 transmits the video signal whose skew amount has been adjusted to the display control unit 15 through the video signal transmission path 5.

The display control unit 15 controls the display unit 16 so that each corresponding display area displays an image, with reference to each video signal which has been subjected to the skew adjustment by the adjustment unit 13. Although the skew adjustment device 2 is provided outside the television receiver 3 in FIG. 7, the skew adjustment device 2 may be built in the television receiver 3. In that case, the video signal transmission path 5 may be a wiring or the like on the substrate. Further, the adjustment unit 13 and the display control unit 15 may be included in the same LSI. In that case, the adjustment unit 13 directly transmits the video signal whose skew amount has been adjusted to the display control unit 15.

The display unit 16 displays an image of each display area based on the control of the display control unit 15.

(Video processing method by main part configuration of skew adjustment device 2)
Hereinafter, a video processing method by the above-described skew adjustment device 2 will be described with reference to FIG. FIG. 8 is a flowchart for explaining an example of an image processing method by the skew adjustment device 2 according to the present embodiment.

First, the acquisition unit 11 acquires video signals of video images respectively displayed by a plurality of display areas in the display unit 16 via individual transmission paths (step S0). In addition, the acquisition unit 11 acquires device identification information indicating devices connected via individual transmission paths via the individual transmission paths. Note that, as an example of the device identification information here, HDMI InfoFrame, Packet information, and the like (in particular, Source Product Description InfoFrame) can be mentioned.

Next, the calculation unit 12 calculates skew adjustment parameters corresponding to each video signal with reference to the plurality of video signals acquired by the acquisition unit 11 (step S1). Here, as an example of the skew adjustment parameter, a time difference or a phase difference (the number of frames) between a target video signal and a reference video signal may be mentioned. In addition, by displaying the skew adjustment parameter on the display unit 16, the user may confirm whether or not the skew adjustment may be performed using the skew adjustment parameter. As a result, the user can improve the skew adjustment accuracy by selecting an appropriate skew adjustment parameter.

Next, the storage unit 14 associates and stores the device identification information acquired by the acquisition unit 11 and the skew adjustment parameter calculated by the calculation unit 12 (step S2). More specifically, the storage unit 14 associates and stores device identification information and a skew adjustment parameter corresponding to a video signal transmitted through the same transmission path as the device identification information.

Next, the adjustment unit 13 acquires device identification information from the acquisition unit 11, and determines whether there is a change in the device identification information (step S3). If the adjustment unit 13 determines that there is a change in the device identification information (YES in step S3), the process proceeds to step S4. If the adjustment unit 13 determines that there is no change in the device identification information (NO in step S3), the skew amount of the video signal (image signal accompanying the device identification information) is adjusted without changing the skew adjustment parameter to be referred to (Step S5).

As a process following step S3, the adjustment unit 13 collates the device identification information determined to have a change in step S3 with the device identification information stored in the storage unit 14 to obtain the same device identification information. It is determined whether the storage unit 14 is stored (step S4).

If the adjustment unit 13 determines that the storage unit 14 stores the same device identification information as the acquired device identification information (YES in step S4), the adjustment unit 13 corresponds to the device identification information stored in the storage unit 14 The skew amount of the video signal is adjusted with reference to the attached skew adjustment parameter (step S6).

On the other hand, when the adjustment unit 13 determines that the storage unit 14 does not store the same device identification information as the acquired device identification information (NO in step S4), the skew adjustment parameter newly calculated by the calculation unit 12 is Then, the skew amount of the video signal is adjusted (step S7).

Next, the display control unit 15 controls the display unit 16 so that each corresponding display area displays an image, with reference to each video signal which has been subjected to the skew adjustment by the adjustment unit 13 (step S8).

(Concrete example)
Hereinafter, a specific example of the image processing method by the above-described skew adjustment device 2 will be described with reference to FIG. (A) and (b) of FIG. 9 are conceptual diagrams for explaining a specific example of the video processing method.

First, the description will be made with reference to FIG. The 8K video output device A (corresponding to the above-described video output device 1) separates video signals (not shown) corresponding to a plurality of display areas in the display unit 16 and the device identification information A into individual transmission paths C. Output through F. Then, the video signal and the device identification information transmitted through the transmission path C are transmitted to the skew expansion device B (corresponding to the above-mentioned home theater system 6). Next, the skew expansion device B transmits the received video signal to the skew adjustment device 2 described above, and transmits the device identification information B to the skew adjustment device 2 instead of the received device identification information A.

Then, in step S0 described above, the acquisition unit 11 acquires the video signal and the device identification information A or the device identification information B via each transmission path. Next, in step S1, since the video signals acquired by the acquisition unit 11 via the transmission paths D to F are synchronized, the calculation unit 12 performs ± 0 as the skew adjustment parameter corresponding to these video signals. Calculate (based on the video signal transmitted by the transmission path F). On the other hand, since the video signal acquired by the acquisition unit 11 via the transmission path C is delayed compared with other video signals, the calculation unit 12 calculates −1 as a skew adjustment parameter corresponding to the video signal. Do.

Next, in step S2 described above, the storage unit 14 acquires the video signal accompanying the device identification information A acquired by the acquisition unit 11 via the transmission paths D to F, and the acquisition unit 11 acquires via the transmission path C The skew adjustment parameter of −1 calculated by the calculation unit 12 is stored in association with the skew generated between the device identification information B and the video signal (the device identification information B based on the device identification information A). 1. The skew adjustment parameters of -1 are associated and stored).

Then, as shown in (b) of FIG. 9, when the skew expansion device B is connected to the transmission path D, the skew expansion device B transmits the device identification information B to the skew adjustment device 2 via the transmission path D. Send. Next, in step S3, the adjustment unit 13 determines that the device identification information acquired by the acquisition unit 11 via the transmission path D has been changed from the device identification information A to the device identification information B.

Next, in step S4, the adjustment unit 13 determines that the storage unit 14 stores the skew generated between the video signal associated with the device identification information A and the video signal associated with the device identification information B. Next, in step S6, the adjustment unit 13 stores the skew adjustment parameter of −1 (stored on the basis of the device identification information A) stored in the storage unit 14 in association with the device identification information A and the device identification information B in step S2. The skew amount of the video signal (video signal transmitted through the transmission path D) is adjusted with reference to the skew adjustment parameter associated with the device identification information B.

(Summary of Embodiment 2)
As described above, the television receiver 3 including the skew adjustment device 2 according to the present embodiment transmits the video signal of the video displayed by each of the plurality of display areas in the display unit through the individual transmission path. The device identification information indicating the devices connected via the individual transmission path and the skew adjustment parameter corresponding to each video signal are stored in association with each other. Further, the television receiver 3 according to the present embodiment adjusts the skew amount of the video signal corresponding to each display area with reference to the skew adjustment parameter associated with the device identification information.

According to the above configuration, when the same device identification information as the stored device identification information is acquired, the skew adjustment parameter associated with the device identification information can be referred to, so the skew adjustment parameter is calculated again. There is no need. Therefore, the amount of processing required for skew adjustment can be reduced. That is, it is possible to efficiently adjust the temporal shift between the video data due to the intermediate device intervening in the transmission path.

Third Embodiment
It will be as follows if Embodiment 3 of this invention is described based on drawing. Also in the present embodiment, the skew adjustment device 2 and the television receiver 3 according to the above-described second embodiment can be used. Therefore, in the following description, it demonstrates using the skew adjustment apparatus 2 and the television receiver 3 which FIG. 7 shows, and description about each member with which the skew adjustment apparatus 2 and the television receiver 3 are provided is abbreviate | omitted.

In the specific example of the second embodiment described above, the configuration in which the skew expansion device B intervenes in the transmission path has been described. So, in this embodiment, the case where the skew expansion device B interposed in the transmission path is removed will be described with reference to FIG. (A) of FIG. 10 is a view similar to (a) of FIG. 9, and (b) of FIG. 8 is an image processing method when the skew enlarging apparatus B shown in (a) of FIG. 10 is removed. It is a conceptual diagram for demonstrating the specific example of. The description using (a) of FIG. 10 is the same as the content described above using (a) of FIG. Therefore, the said description is abbreviate | omitted and demonstrates with reference to (b) of FIG.

As shown in (b) of FIG. 10, when the skew enlarging device B is removed in the transmission path C, the 8K video output device A transmits the device identification information A to the skew adjustment device 2 via the transmission path C. Do. Then, in step S3, the adjustment unit 13 determines that the device identification information acquired by the acquisition unit 11 via the transmission path C has been changed from the device identification information B to the device identification information A.

Next, in step S4, the adjustment unit 13 determines that the storage unit 14 stores the device identification information A. Next, in step S6 described above, since the skew adjustment parameter stored by the storage unit 14 in association with the device identification information A in step S2 is 0 in step S2, the adjustment unit 13 transmits the video signal (transmitted on the transmission path C). The video signal is transmitted to the display control unit 15 without adjusting the skew amount of the video signal).

As described above, even when the intermediate device interposed in the video signal transmission path is removed, the skew adjustment parameter associated with it can be referred to, so it is necessary to calculate the skew adjustment parameter again. Absent. Therefore, the amount of processing required for skew adjustment can be reduced.

Further, instead of the above configuration, the adjustment unit 13 acquires a plurality of pieces of device identification information via individual transmission paths (transmission paths C to F), and uses the transmission path as a reference (in the above example, transmission The adjustment of the amount of skew may be stopped on a transmission path (in the above example, transmission paths C to E) other than the reference for obtaining the same apparatus identification information as the apparatus identification information obtained via the path F). Thus, skew adjustment can be stopped as needed without referring to the skew adjustment parameter associated with the device identification information.

Embodiment 4
The fourth embodiment of the present invention will be described as follows. Also in the present embodiment, the skew adjustment device 2 and the television receiver 3 according to the above-described second embodiment can be used. Therefore, in the following description, it demonstrates using the skew adjustment apparatus 2 and the television receiver 3 which FIG. 7 shows, and description about each member with which the skew adjustment apparatus 2 and the television receiver 3 are provided is abbreviate | omitted.

In the specific example of the second embodiment described above, the configuration in which the skew expansion device B intervenes in the transmission path has been described. Then, in step S1, the calculating unit 12 delays the video signal acquired by the acquiring unit 11 through the transmission path C in comparison with other video signals, and therefore, as a skew adjustment parameter corresponding to the video signal, Calculated -1. In step S2, the storage unit 14 identifies the video signal associated with the device identification information A acquired by the acquisition unit 11 via the transmission paths D to F and the device identification acquired by the acquisition unit 11 via the transmission path C. The skew adjustment parameter of −1 calculated by the calculation unit 12 is stored in association with the skew generated with the video signal accompanying the information B.

On the other hand, in the present embodiment, unlike the skew enlarging device B, a configuration in which the device C which does not expand the skew intervenes in the transmission path will be described. In the configuration, in step S1, since the calculating unit 12 has no delay compared to other video signals in the video signal acquired by the acquiring unit 11 through the transmission path C, the skew adjustment parameter corresponding to the video signal Calculate ± 0 as

In step S2, the storage unit 14 identifies the video signal associated with the device identification information A acquired by the acquisition unit 11 via the transmission paths D to F and the device identification acquired by the acquisition unit 11 via the transmission path C. The skew adjustment parameter of ± 0 calculated by the calculation unit 12 is stored in association with the skew generated between the information B and the video signal accompanied by the information B.

As described above, even if any device is inserted in the path of the video signal, a large skew does not necessarily occur, so the skew adjustment parameter stored in association with the device identification information may be 0. . Then, the adjustment of the skew amount may be stopped according to the skew adjustment parameter of zero.

Fifth Embodiment
The fifth embodiment of the present invention will be described below. Also in the present embodiment, the skew adjustment device 2 and the television receiver 3 according to the above-described second embodiment can be used. Therefore, in the following description, it demonstrates using the skew adjustment apparatus 2 and the television receiver 3 which FIG. 7 shows, and description about each member with which the skew adjustment apparatus 2 and the television receiver 3 are provided is abbreviate | omitted.

In the specific example of the second embodiment described above, in step S1, the calculation unit 12 sets skew adjustment parameters ± for the video signal transmitted through the transmission path D or the transmission path E based on the video signal transmitted through the transmission path F. 0 was calculated, and the skew adjustment parameter -1 for the video signal transmitted through the transmission path C was calculated. Then, in step S2, the storage unit 14 identifies the video signal associated with the device identification information A acquired by the acquisition unit 11 via the transmission paths D to F, and the device identification acquired by the acquisition unit 11 via the transmission path C. The skew adjustment parameter of −1 calculated by the calculation unit 12 is stored in association with the skew generated with the video signal accompanying the information B.

On the other hand, in the present embodiment, based on the “skew adjustment parameter-1 associated with the device identification information B based on the device identification information A” stored in the storage unit 14 in step S2 described above, the calculation unit 12 , “Skew adjustment parameter +1 associated with device identification information A based on device identification information B” (that is, transmission based on the video signal transmitted through the transmission path D, the transmission path E or the transmission path F) Further, skew adjustment parameters for the video signal transmitted through the path F are calculated. Then, the storage unit 14 stores “a skew adjustment parameter + 1 associated with the device identification information A based on the device identification information B”.

Further, regarding another aspect, the case where the acquisition unit 11 acquires another video signal and the device identification information C via the transmission path G (not shown) other than the above-described transmission paths in step S0 will be examined. In the aspect, in step S1, the calculation unit 12 calculates a skew adjustment parameter ± 0 for the video signal transmitted through the transmission path G based on the video signal transmitted through the transmission path F, and the storage unit 14 It is assumed that “a skew adjustment parameter ± 0 associated with device identification information C based on the device identification information A” is stored. In that case, the calculation unit 12 stores the “skew adjustment parameter-1 associated with the device identification information B based on the device identification information A” stored in the storage unit 14 and “device identification based on the device identification information A”. Based on the skew adjustment parameter ± 0 associated with the information C, “a skew adjustment parameter-1 associated with the device identification information B based on the device identification information C” may be calculated. Then, the storage unit 14 may store “a skew adjustment parameter −1 associated with the device identification information B based on the device identification information C”.

That is, in the present embodiment, the calculation unit 12 calculates the skew adjustment parameter associated with another device identification information with reference to the skew adjustment parameter associated with the device identification information stored in the storage unit 14. . As a result, it is not necessary to calculate the skew adjustment parameter again based on the video signal, and the processing amount of the skew adjustment can be reduced.

[Example of software implementation]
The control block of the television receiver 3 (in particular, the skew estimation unit 32 and the display control unit 33), and the control block (in particular, the processing unit 10) of the skew adjustment device 2 included in the television receiver 3 are integrated. It may be realized by a logic circuit (hardware) formed in a circuit (IC chip) or the like, or may be realized by software.

In the latter case, the television receiver 3 and the skew adjustment device 2 include a computer that executes a program instruction that is software that implements each function. The computer includes, for example, at least one processor (control device) and at least one computer readable storage medium storing the program. Then, in the computer, the processor reads the program from the recording medium and executes the program to achieve the object of the present invention. For example, a CPU (Central Processing Unit) can be used as the processor. As the above-mentioned recording medium, a tape, a disk, a card, a semiconductor memory, a programmable logic circuit or the like can be used besides “a non-temporary tangible medium”, for example, a ROM (Read Only Memory). In addition, a RAM (Random Access Memory) or the like for developing the program may be further provided. The program may be supplied to the computer via any transmission medium (communication network, broadcast wave, etc.) capable of transmitting the program. Note that one aspect of the present invention can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

[Summary]
A display device (3) according to aspect 1 of the present invention includes a display unit (34), and an image obtained by acquiring an image signal of an image displayed by each of a plurality of display areas in the display unit through individual transmission paths. In the display unit, a signal acquisition unit (31), a skew estimation unit (32) for estimating a skew amount which is a temporal shift of the video signal in the plurality of display regions, and a skew amount estimated by the skew estimation unit And a display control unit (33) for displaying.

According to the above configuration, since the estimated skew amount is displayed for each display area, it is possible to adjust temporal deviation between a plurality of images.

In the display device according to aspect 2 of the present invention, in the aspect 1, the display control unit may display the amount of skew together with the image indicated by the image signal.

According to the above configuration, since the estimated skew amount is displayed together with the video represented by the video signal for each display area, it is possible to clearly show the video with the skew.

In the display device according to aspect 3 of the present invention, in the above aspect 2, the display control unit causes the skew amount to be displayed together with the image represented by the video signal and the image adjusted by the skew amount. It is also good.

According to the above configuration, since the estimated skew amount is displayed together with the image adjusted by the skew amount for each display area, it can be shown whether the image adjusted by the skew amount is correct.

A television receiver according to aspect 4 of the present invention includes the display device according to aspects 1 to 3.

A display device (television receiver 3) according to aspect 5 of the present invention includes a display unit (16) and video signals of images displayed by each of a plurality of display areas in the display unit via individual transmission paths. Device identification information indicating a device connected to the video signal acquisition unit via the individual transmission path, and the time of the video signal in the plurality of display areas A storage unit (14) that stores skew adjustment parameters for adjusting the amount of skew, which is a potential deviation, in association with each other, referring to the skew adjustment parameters associated with the device identification information, in each display area And a skew adjustment unit (adjustment unit 13) for adjusting the skew amount of the corresponding video signal.

According to the above configuration, since the skew adjustment parameter associated with the device identification information is stored, the necessary skew adjustment parameter can be selected only by referring to the device identification information. Therefore, there is no need to calculate the skew adjustment parameter again. Therefore, the amount of processing required for skew adjustment can be reduced.

In the display device (television receiver 3) according to aspect 6 of the present invention, in the above aspect 5, when the skew adjustment unit acquires the same device identification information as the device identification information stored in the storage unit, The skew of the video signal may be adjusted with reference to the skew adjustment parameter associated with the device identification information by the storage unit.

According to the above configuration, when the same device identification information as the stored device identification information is acquired, the skew adjustment parameter associated with the device identification information can be referred to. There is no need to calculate. Therefore, the amount of processing required for skew adjustment can be reduced.

In the display device according to aspect 7 of the present invention, in the above aspect 5 or 6, the skew adjustment unit acquires a plurality of the device identification information via the individual transmission paths, and via the transmission path serving as a reference. The adjustment of the skew amount is stopped in a transmission path other than the reference for which the same device identification information as the obtained device identification information is obtained.

According to the above configuration, the skew adjustment can be stopped as needed without referring to the skew adjustment parameter associated with the device identification information.

In the display device according to aspect 8 of the present invention, in the above aspects 5 to 7, the device identification information may be HDMI InfoFrame or Packet information.

According to the above configuration, it is possible to adjust the amount of skew of the video signal corresponding to each display area with reference to the skew adjustment parameter associated with the InfoFrame or Packet information of HDMI.

A television receiver according to aspect 9 of the present invention includes the display device according to any one of aspects 5 to 8 above.

According to the above configuration, in the television receiver, the same effects as in the above aspects 5 to 8 are obtained.

The video processing method according to aspect 10 of the present invention is a video processing method executed by a display device including a display unit, and the video signal of the video displayed by each of the plurality of display areas in the display unit is individually Video signal acquisition step obtained through the transmission path of the device, device identification information indicating a device connected to the display device through the individual transmission path, and temporal deviation of the video signal in the plurality of display areas A skew adjustment parameter for adjusting the amount of skew, and storing the skew adjustment parameter in association with each other, and referring to the skew adjustment parameter associated with the device identification information to adjust the skew in each display area And adjusting.

According to the above configuration, the same effect as that of the fifth aspect is achieved.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

1 Video output device 2 Skew adjustment device 3 Television receiver (display device)
4, 5 Cable 6 Home Theater System 7 Speaker System 10 Processing Unit 11 Acquisition Unit 12 Calculation Unit 13 Adjustment Unit 14 Storage Unit 15 Display Control Unit 16 Display Unit 31 Display Unit 31 Video Signal Acquisition Unit 32 Skew Estimation Unit 33 Display Control Unit 34

Display Unit

100, 101 image system

Claims

A display unit,
A video signal acquisition unit that acquires video signals of video displayed by each of a plurality of display areas in the display unit via individual transmission paths;
A skew estimation unit that estimates a skew amount that is a temporal shift of video signals in the plurality of display areas;
A display control unit that causes the display unit to display the amount of skew estimated by the skew estimation unit.
The display device according to claim 1, wherein the display control unit displays the skew amount together with an image represented by the video signal.
The display device according to claim 2, wherein the display control unit displays the skew amount together with the image represented by the video signal and the image adjusted by the skew amount.
A television receiver comprising the display device according to any one of claims 1 to 3.
A display unit,
A video signal acquisition unit that acquires video signals of video displayed by each of a plurality of display areas in the display unit via individual transmission paths;
Device identification information indicating a device connected to the video signal acquisition unit via the individual transmission path, and a skew adjustment parameter for adjusting a skew amount which is a temporal shift of the video signal in the plurality of display areas A storage unit that associates and stores
A skew adjustment unit that adjusts a skew amount of the video signal corresponding to each display area with reference to the skew adjustment parameter associated with the device identification information;
The display apparatus characterized by having.
When the skew adjustment unit acquires device identification information identical to the device identification information stored in the storage unit, the storage unit refers to the skew adjustment parameter associated with the device identification information to obtain the image signal The display device according to claim 5, wherein skew is adjusted.
The skew adjustment unit acquires a plurality of the device identification information via the individual transmission path, and transmits the device identification information identical to the device identification information obtained via the reference transmission path. The display device according to claim 5, wherein the adjustment of the skew amount is stopped in a path.
The display device according to any one of claims 5 to 7, wherein the device identification information is HDMI InfoFrame or Packet information.
A television receiver comprising the display device according to any one of claims 5 to 8.
A video processing method executed by a display device provided with a display unit, the video processing method comprising:
An image signal acquisition step of acquiring an image signal of an image displayed by each of a plurality of display areas in the display unit through an individual transmission path;
Device identification information indicating a device connected to the display device via the individual transmission path, and a skew adjustment parameter for adjusting a skew amount which is a temporal deviation of video signals in the plurality of display regions; A storage step of storing in association with each other
A skew adjustment step of adjusting the skew in each display area with reference to the skew adjustment parameter associated with the device identification information;
An image processing method including:
A control program for causing a computer to function as the display device according to claim 5, wherein the control program causes the computer to function as the video signal acquisition unit, the storage unit, and the skew adjustment unit.
The computer-readable recording medium which recorded the control program of Claim 11.