JP3707664B2 - Display angle conversion device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display angle conversion device used for an image display device such as a television receiver, that is, a display angle conversion device that converts an angle of view of an image displayed on a screen.
[0002]
[Prior art]
In recent years, television receivers (hereinafter referred to as wide TVs) equipped with a display device (such as a cathode ray tube) having a wide aspect display unit having an aspect ratio of 16: 9 have become widespread. As a video signal to be displayed on a wide TV, as shown in FIG. 11A, the aspect ratio is 4: 3, but there are black bands (no-picture parts) in the upper and lower parts. Vista size, cinema size, screen size There is a wide image in the letterbox format called "etc." The wide TV has a field angle conversion function for switching the display field angle manually or automatically.
[0003]
The display angle of view here is a normal mode in which an image with an aspect ratio of 4: 3 is compressed in the horizontal direction and displayed as it is at the horizontal center of the display unit with an aspect ratio of 4: 3, and an image with an aspect ratio of 4: 3. A full mode in which the entire image is displayed on the entire display unit, a Vista mode in which an image with an aspect ratio of 4: 3 is enlarged in the vertical direction, and a central part in the vertical direction in the image is enlarged and displayed. In the full mode, an image having an aspect ratio of 4: 3 is displayed in a horizontally stretched and vertically contracted state, resulting in a distorted display state. The Vista mode is suitable for displaying a wide image having black bands in the upper and lower portions.
[0004]
In the wide image having a black band shown in FIG. 11A, if the image part at the center in the vertical direction excluding the black band part has an aspect ratio of 16: 9, the image part having the aspect ratio of 16: 9 is converted to the aspect ratio. By virtue of the Vista mode displayed on the entire 16: 9 display unit, an optimal display state in which no black band is displayed on the display unit is achieved. However, there are many wide images in which the image portion at the center in the vertical direction excluding the black belt portion is further horizontally longer than the aspect ratio 16: 9. The wide image shown in FIG. 11A shows a case where the image portion at the center in the vertical direction is an image that is further horizontally long than the aspect ratio of 16: 9.
[0005]
When the wide image shown in FIG. 11A is displayed on a wide TV, angle of view conversion as shown in FIGS. 11B to 11E can be considered. FIG. 11B shows a state in which the left and right end portions of the wide image are slightly deleted and the angle of view is converted so that the black band does not appear on the display portion. In order to realize this display state, a method of cutting out an image so as to have an aspect ratio of 16: 9 from the image portion at the center in the vertical direction by digital signal processing and enlarging it in the horizontal and vertical directions, or horizontal and vertical deflection There is a way to increase the width. The method of expanding the deflection width is used only when the display device is a cathode ray tube.
[0006]
In FIGS. 11C to 11E, the image is not enlarged in the horizontal direction, but the image is enlarged only in the vertical direction. In this case, a part of the black band appears on the display unit (screen), and FIG. 11C shows a case where the angle of view is converted so that a part of the black band appears at the upper end of the screen. FIG. 11D shows a case where the angle of view is converted so that a black band appears at a part of the lower end of the screen, and FIG. 11D shows a case where the angle of view is converted so that a part of the black band appears at both upper and lower ends of the screen. . As described above, when a video signal (wide image) having a black band whose image portion at the center in the vertical direction is longer than the aspect ratio 16: 9 is displayed on a wide TV, a plurality of angle-of-view conversions are performed. There is a method.
[0007]
[Problems to be solved by the invention]
Conventionally, when the angle of view of a wide image as shown in FIG. 11A is converted, a predetermined display angle of view, for example, a part of a black belt as shown in FIG. The angle of view was converted and displayed in the state. However, what angle of view is optimal differs depending on user preferences. That is, a user who prefers the display angle of view shown in FIG. 11B in which no black band appears even if the left and right ends are deleted, or the display angle of view shown in FIG. 11C in which the black band is positioned at the upper end of the screen. Some users prefer the display angle of view shown in FIG. 11D in which black bands appear evenly on both upper and lower ends of the screen.
[0008]
Therefore, conventionally, when the image is displayed at an angle of view different from the preferred display angle of view, the user has to manually adjust the optimum angle of view to obtain the desired angle of view. Furthermore, when the adjustment state is once canceled and then a wide image having the same aspect ratio is input to the image portion at the center in the vertical direction, the adjustment must be made again so that the optimum display angle of view is obtained. There was a point.
[0009]
The present invention has been made in view of such problems, and an object of the present invention is to provide a display angle conversion device capable of automatically converting the angle of view to a user's favorite display angle of view. Another object of the present invention is to provide a display angle conversion device that is easy to use when automatically converting the angle of view to a user's favorite display angle of view.
[0010]
[Means for Solving the Problems]
The present invention is to solve the above-described problems of the prior art. , Enter An angle of view detection means (4) for detecting the angle of view of the input video signal, and a display angle of view when the video signal is displayed on the display unit according to the angle of view detected by the angle of view detection means. In a display angle conversion device comprising an angle of view switching circuit (6) for switching between and a display angle of view manual adjustment means (8) for manually adjusting the display angle of view, the user can manually adjust the display angle of view. Storage means (5) for storing the angle of view of the video signal whose display angle of view has been adjusted in association with the display angle of view after the user has adjusted with the display angle of view manual adjustment means, and the input video Detection means (4) for detecting whether the angle of view of the signal is the angle of view stored in the storage means, and the angle of view of the input video signal is the angle of view stored in the storage means When detected by the detection means, the display angle of view of the video signal is stored in the memory. The display field angle automatic adjustment means (4, 6) for automatically adjusting the display field angle to be stored in correspondence with the display field angle and the frequency of the display field angle adjusted by the display field angle manual adjustment means are measured. A display comprising frequency measuring means (4, 9) and rewriting means (4) for rewriting the stored contents of the storage means in accordance with the frequency of the display angle of view measured by the frequency measuring means. An angle-of-view conversion device is provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a display angle conversion device of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a first embodiment of the display angle conversion device of the present invention. FIG. 2 is a flowchart for explaining the operation of the first embodiment of the display angle conversion device of the present invention. 4 is a diagram illustrating an example of the operation of the display angle-of-view conversion device of the present invention, FIG. 5 is a diagram illustrating an example of a preset display angle of view, and FIG. 6 is a diagram illustrating an example of a display angle of view adjusted by the user. FIG. 7 is a block diagram showing a second embodiment of the display angle-of-view conversion apparatus of the present invention. FIGS. 8 and 9 are flowcharts for explaining the operation of the second embodiment of the display angle-of-view conversion apparatus of the present invention. 10 is a view for explaining a second embodiment of the display angle conversion device of the present invention.
[0012]
<First embodiment>
In FIG. 1, an incoming video signal (luminance signal or composite signal) is input to a low-pass filter 1 and an angle-of-view switching circuit 6. The low-pass filter 1 removes the high frequency component of the input video signal and inputs it to the amplifier circuit 2. The amplifier circuit 2 amplifies the input signal and inputs it to the A / D converter 3. The reason why the high-frequency component is removed by the low-pass filter 1 is that the frequency constituting the black band portion in the image is the low-frequency component, and the high-frequency component is unnecessary to detect the black band portion, and at random. This is because pulse noise caused by noise or spark is removed to prevent malfunction.
[0013]
The A / D converter 3 converts an input signal into a digital signal and inputs the digital signal to a microcomputer 4 (hereinafter abbreviated as a microcomputer). The microcomputer 4 receives timing signals such as a horizontal synchronizing signal and a vertical synchronizing signal for capturing video data. The microcomputer 4 takes in the video data converted into a digital signal by the A / D converter 3 using the input timing signal. The microcomputer 4 analyzes the video data by a method that will be described in detail later to determine whether or not the incoming video signal is a wide image having black bands (no-image portions) in the upper and lower portions. If there is, the start position and end position of the video are detected. That is, the microcomputer 4 is an angle of view detection means. A nonvolatile memory 5 and an operation unit 8 are connected to the microcomputer 4. The usage of the nonvolatile memory 5 and the operation unit 8 will be described in detail later.
[0014]
If the microcomputer 4 analyzes the video data and determines that the incoming video signal is a wide image as shown in FIG. 11A having black bands in the upper and lower portions, the microcomputer 4 detects the angle of view switching circuit. 6 is instructed to switch the display angle of view. The angle-of-view switching circuit 6 converts the display angle of the video signal input in accordance with this instruction and supplies it to the display device 7 such as a cathode ray tube. The angle-of-view switching circuit 6 converts the image display angle of view by digital signal processing, or switches the image display angle of view by manipulating at least one of the horizontal and vertical deflection widths.
[0015]
Here, a video data capturing method by the microcomputer 4 and an analysis method thereof will be described. As shown in FIG. 3, the microcomputer 4 first captures video data over one field in the vertical direction of the screen at a position in a predetermined horizontal direction (for example, the left end). In the next field, the horizontal position is delayed backward (right side in the figure), the video data is captured in the same way in the next horizontal position, and then the horizontal position is restored to the last position in the horizontal direction. To do.
[0016]
In the example of FIG. 3, 15 points are sampled so that the horizontal positions of the screen are different, but the number of samplings may be reduced or increased. In this example, since one horizontal position is sampled in one field, 15 fields are required, but a plurality of horizontal positions may be sampled in one field. Furthermore, when sampling from the upper part to the lower part of the screen at a horizontal position, sampling may be performed with skipped scanning lines (lines) as illustrated, or sampling may be performed with all scanning lines. In this way, the video data sampling method may be arbitrary.
[0017]
For example, by adding the sampled video data at all the horizontal positions, data as shown in FIG. 4A is obtained. The entire screen is relatively dark and it may be difficult to determine the boundary between the video portion and the black belt portion. Therefore, the microcomputer 4 processes data as follows as an example. First, the data shown in FIG. 4A is differentiated in the vertical direction (vertical direction), and as shown in FIG. 4B, a difference between lines (a change amount in the line direction) is calculated. This is to take advantage of the fact that the mask portion has no change in the image so that energy is lost by differentiation. In this way, the boundary between the video part and the black belt part becomes prominent, and the upper video start position and the lower video end position can be detected. Further, in order to reliably detect the boundary, the data shown in FIG. 4B may be squared or converted into an absolute value.
[0018]
Then, the microcomputer 4 detects the upper image start position and the lower image end position based on FIG. 4B or data obtained by squaring or absoluteizing it. For example, the microcomputer 4 searches the video data processed as described above simultaneously from the upper part of the scanning line and the lower part of the scanning line, and obtains the address of the line rising above a predetermined level. Thereby, the video start position and video end position can be obtained as line addresses, and the upper and lower black band widths can also be obtained.
[0019]
In the above example, the video data at all the sampled horizontal positions are added, and the video start position and video end position are obtained based on the added data, but the video data is obtained based on the video data at each horizontal position. The start position and the video end position may be obtained, and the final video start position and video end position may be determined by combining the video start position and the video end position at all the horizontal positions. Furthermore, by the above analysis method, it is possible to detect whether or not subtitles are included in the lower black belt, and the vertical start position and end position of the subtitle portion.
[0020]
Then, the view angle switching circuit 6 converts the display view angle of the input video signal based on the analysis result of the microcomputer 4. Therefore, the video portion at the center in the vertical direction is enlarged on the display portion (screen) of the display device 7, and a display that makes full use of the wide aspect is made.
[0021]
Now, at this time, as described in FIG. 11A, the incoming video signal is a wide image in which the image portion at the center in the vertical direction is longer than the aspect ratio of 16: 9. Think. As an example, as shown in FIG. 5, the microcomputer 4 switches the angle of view so as to automatically convert the display angle of view so that a part of the black belt is positioned at the lower end of the screen as a preset angle of view. The circuit 6 is controlled. It is assumed that the user does not like the preset display angle of view and manually adjusts the display angle of view by operating the operation unit 8 as shown in FIG. 6 (A) or (B). The operation unit 8 is an operation key provided on the remote control transmitter or the receiver body, and is a display field angle manual adjustment unit. 6A shows an example in which the left and right ends of the wide image are slightly deleted and the display angle of view is converted by expanding both horizontally and vertically so that the black band does not appear on the display unit. ) Is an example of converting the display angle of view by enlarging only in the vertical direction so that a part of the black band appears at the upper end of the screen.
[0022]
When the user manually adjusts the display angle of view using the operation unit 8, the microcomputer 4 stores the adjusted display angle of view in the nonvolatile memory 5. More specifically, the angle of view of the manually set video signal, that is, the angle of view (aspect) of the image portion at the center in the vertical direction excluding the black belt portion, in this example, having black belts in the upper and lower portions. The display angle of view actually displayed on the display unit after manual adjustment is stored in the nonvolatile memory 5 in association with the display field angle.
[0023]
As the data representing the angle of view of the image portion at the center in the vertical direction, the video start position and the video end position may be stored as line numbers (addresses), and the display angle of view displayed on the display unit may be stored. Various types of data can be stored, such as a vertical display range stored as line numbers, horizontal or vertical deflection width and scanning position information, and horizontal or vertical magnification. Conceivable. The nonvolatile memory 5 is a storage unit that stores the angle of view of the video signal when manually adjusted by the operation unit 8 and the display angle of view after adjustment in association with each other.
[0024]
In this embodiment, as a preferred embodiment, the angle of view of the video signal stored in the non-volatile memory 5 is the angle of view of the image portion at the center in the vertical direction excluding the black belt portion. The angle of view may be only whether or not the image has a black belt in the upper and lower portions (letter box format). In other words, the angle of view of the video signal at the time of manual adjustment may be simply used as information indicating that it is in the letterbox format, and this may be stored in association with the adjusted display angle of view.
[0025]
When the video signal having the same angle of view is input again, the microcomputer 4 controls the angle-of-view switching circuit 6 so that the display angle of view previously adjusted by the user is obtained. As a result, once the user manually adjusts the display angle of view, the wide image is automatically displayed at the desired display angle of view from the next time, so that the usability is improved. In the above description, the case where the image is manually adjusted when the aspect ratio of the central image portion excluding the black belt portion is not 16: 9 has been described. It goes without saying that the same operation is performed when a video having an aspect ratio of 16: 9 in the central image portion is manually adjusted.
[0026]
The operation of the present invention will be further described with reference to the flowchart shown in FIG. In FIG. 2, it is determined in step S1 whether or not the channel or input has been switched. If switched, the mode set in the automatic angle-of-view conversion is reset in step S2, and a re-detection designation flag is set. Set. In step S3, an image (video data) is captured and the edge of the black belt portion is extracted. If the channel or input is not switched in step S1, the process proceeds to step S3 as it is. In step S4, it is determined whether or not there is a black band. If there is no black band, in step S6, an optimum mode is set from a preset display field angle as an automatic field angle conversion process. Then, the process returns to step S1. If a black belt exists, the process proceeds to step S5.
[0027]
In step S5, it is determined whether or not the video signal has an angle of view obtained by manually adjusting a previously set display angle of view. The microcomputer 4 determines whether or not the angle of view of the input video is included in the angle of view of the video stored in the nonvolatile memory 5. The microcomputer 4 is detection means for detecting whether or not the angle of view of the input video signal is the angle of view stored in the nonvolatile memory 5.
[0028]
If the angle of view is not adjusted before, the process proceeds to step S6. If the angle of view has been adjusted before, whether or not the display angle of view currently displayed on the display device 7 is the display angle of view stored in the nonvolatile memory 5 and registered in step S7. Determine. If it is the registered display angle of view, the process directly returns to step S1. If it is not the registered display angle of view, in step S8, the screen is adjusted so that the registered display angle of view is the display angle of view designated by the user, and the process returns to step S1. The microcomputer 4 and the view angle switching circuit 6 are display angle automatic adjustment means for automatically adjusting the display view angle of the video signal so as to be the display view angle stored in the nonvolatile memory 5. The display angle of view automatic adjustment here is a display angle of view obtained by further finely adjusting a preset display angle of view, as is clear from the above description.
[0029]
In this embodiment, as shown in FIG. 2, the automatic adjustment of the display angle of view is performed only for an image having a black band portion. However, a normal aspect ratio of 4: 3 having no black band portion is used. It is natural that the display angle of view may be registered and the display angle of view automatic adjustment operation may be performed in the same manner even when the image is manually adjusted. The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the spirit of the present invention.
[0030]
<Second embodiment>
The second embodiment shown in FIGS. 7 to 10 is a further development of the first embodiment. In the first embodiment, when the user manually operates the operation unit 8 and adjusts the display angle of view manually, the angle of view of the manually set video signal and the display image actually displayed on the display unit are set. The angle is stored in the non-volatile memory 5 so that when the video signal having the same angle of view is input next time, the angle of view switching circuit 6 is controlled so that the stored angle of view is obtained. Yes. In this case, if all the display angles are stored, the capacity of the nonvolatile memory 5 becomes infinite. Alternatively, the stored display angle of view may be deleted and rewritten in order from the oldest, but this is not necessarily easy to use. The second example is a more preferable embodiment in which the capacity of the non-volatile memory 5 is limited and the configuration is excellent in usability.
[0031]
7, the same parts as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted as appropriate. The video data capturing method by the microcomputer 4 and the analysis method thereof are the same as those in the first embodiment. As shown in FIG. 7, the microcomputer 4 is further connected with a timer 9 in addition to the nonvolatile memory 5 and the operation unit 8. The timer 9 may be different from the microcomputer 4 or may be built in the microcomputer 4. As will be described later, the timer 9 is for measuring the display time (viewing time) of the display angle of view adjusted by the user.
[0032]
The operation of the second embodiment will be described with reference to the flowchart of FIG. Also in FIG. 8, the same steps as those in FIG. In FIG. 8, it is determined in step S1 whether or not the channel or input has been switched. If switched, the mode set in the automatic angle-of-view conversion is reset in step S2, and a re-detection designation flag is set. Set. In step S3, an image (video data) is captured and the edge of the black belt portion is extracted. If the channel or input is not switched in step S1, the process proceeds to step S3 as it is. In step S4, it is determined whether or not there is a black band. If there is no black band, in step S6, an optimum mode is set from a preset display field angle as an automatic field angle conversion process. Then, the process proceeds to step S9. Step S9 will be described later. If a black belt exists, the process proceeds to step S5.
[0033]
In step S5, it is determined whether or not the video signal has an angle of view obtained by manually adjusting a previously set display angle of view. The microcomputer 4 determines whether or not the angle of view of the input video is included in the angle of view of the video stored in the nonvolatile memory 5. If the angle of view is not adjusted before, the process proceeds to step S6. If the angle of view has been adjusted before, whether or not the display angle of view currently displayed on the display device 7 is the display angle of view stored in the nonvolatile memory 5 and registered in step S7. Determine. If it is the registered display angle of view, the optimization subroutine in step S11 is executed, and the process returns to step S1. The optimization subroutine in step S11 will be described in detail later.
[0034]
In step S7, if it is not the registered display angle of view, in step S8, the screen is adjusted to become the registered display angle of view which is the display angle of view designated by the user, and the process proceeds to step S10. In step S10, the number of times of selection of the display angle of view is obtained and the selection time is integrated. The number of selections is obtained by incrementing the number of selections stored in the nonvolatile memory 5 by the microcomputer 4. The selection time is the time (display time) during which the display angle of view is displayed on the display device 7 and is obtained by the timer 9. The microcomputer 4 and the timer 9 are frequency measuring means for measuring the frequency of the display angle of view (at least one of the number of selections or the selection time) adjusted by the display angle of view manual adjustment means (operation unit 8).
[0035]
Then, the optimization subroutine in step S11 is executed, and the process returns to step S1. When the process proceeds from step S4 or S5 to step S6, the display angle of view is not the display angle adjusted by the user but is displayed at a preset display angle of view. Is terminated in step S9.
[0036]
Here, the optimization subroutine in step S11 in FIG. 8 will be described. Before explaining the process of the optimization subroutine in step S11 with reference to FIG. 9, first, the nonvolatile memory 5 will be described with reference to FIG. As shown in FIG. 10, the non-volatile memory 5 is a factory setting, and an area 51 for storing a preset non-rewritable display angle of view and a user registration for storing a display angle of view and the like adjusted by the user. An area 52 that is an area; a work area for learning during user registration; an area 53 that temporarily stores a display angle of view and the like adjusted by the user; and an area 54 that stores a currently selected display angle of view and the like. Have.
[0037]
The preset angle of view, the temporary preset angle of view, and the currently selected angle of view of the areas 51 to 54 are the angle of view of the video signal when manually adjusted by the operation unit 8 and the display angle of view after adjustment as described above. And correspond to each other. In the areas 52 to 54, together with the preset view angle, the temporary preset view angle, and the currently selected display view angle, the number of times of selection and the accumulated time of the display time are stored. Note that the display time is not necessarily the actual time, and may be stored as a multiple of a unit time (for example, 5 minutes). The display time may be stored in a time format, or may be stored in place of an arbitrary coefficient. The initial values of the number of selections and the integration time in the areas 52 to 54 are zero.
[0038]
7, the non-volatile memory 5 has such a configuration, and the microcomputer 4 executes the processing of the optimization subroutine shown in FIG. In FIG. 9, in step S <b> 111, it is determined whether or not the number of selections of the currently selected display angle of view stored in the region 54 is greater than the minimum number of selections stored in the work area for learning in the region 53. To do. If it is not greater than the minimum number of selections of the learning work area, the number of selections and the selection time are updated in step S113, and the process proceeds to step S115. If it is greater than the minimum number of selections of the learning work area, the accumulated time of the currently selected display angle of view stored in the area 54 is the minimum stored in the learning work area of the area 53 in step S112. It is determined whether it is longer than the total time. If it is not longer than the minimum accumulated time of the learning work area, the number of selections and the selection time are updated in step S113, and the process proceeds to step S115.
[0039]
In step S112, if it is longer than the minimum accumulated time of the learning work area, the process proceeds to step S114. In step S114, the stored contents of the minimum selection count and the minimum accumulated time in the learning work area in the area 53 are deleted, and information relating to the currently selected display angle of view stored in the area 54 is written. As a result, the temporary preset angle of view stored in the learning work area is sequentially rewritten to one with a high viewing frequency. In the present embodiment, a selection with a large number of selections and a large selection time is updated to the stored contents of the learning work area. If the number of selections is small, the number of selections may be updated to the stored contents of the learning work area.
[0040]
Further, in step S115, it is determined whether the maximum number of selections in the learning work area in the region 53 is greater than the minimum number of selections stored in the user registration area in the region 52. If it is not greater than the minimum number of selections stored in the user registration area, the process returns. If it is greater than the minimum number of selections stored in the user registration area, the minimum integration time stored in the user registration area in area 52 is the one with the maximum integration time in the learning work area in area 53 in step S116. It is determined whether or not there are more. If it is not longer than the minimum accumulated time stored in the user registration area, the process returns as it is.
[0041]
If it is longer than the minimum accumulated time stored in the user registration area in step S116, the process proceeds to step S117. In step S117, the stored contents of the minimum selection count and minimum integration time in the user registration area in the area 52 are deleted, and the storage contents of the maximum selection count and maximum integration time in the learning work area in the area 53 are written. As a result, the preset view angles stored in the user registration area are sequentially rewritten to those having a high viewing frequency. Here, too, the number of selections and a large selection time are updated to the stored contents of the user registration area. However, even if the number of selections is small, the selection time is large or the selection time is small. Alternatively, those having a large number of selections may be updated to the stored contents of the user registration area.
[0042]
As described above, in the second embodiment, if the number of selections and selection time of the stored contents in the area 54 are large, the stored contents are written into the learning work area in the area 53, and further, the stored contents in the learning work area 53 are selected. If the number of times or the selection time is large, it is written in the user registration area in the area 52. For a short time from the initial state in which no information is written in the areas 52 to 54, the infrequent ones are also written to the user registration area in the area 52 and selected as the preset angle of view. As manual operations are repeated, only frequently-used items remain in the user registration area. Thereby, it is possible to obtain a display angle-of-view conversion device that is excellent in usability with a limited capacity of the nonvolatile memory 5.
[0043]
【The invention's effect】
As described above in detail, the display angle conversion device of the present invention stores the angle of view of the video signal when adjusted by the display angle of view manual adjustment means and the display angle of view after adjustment in association with each other. Means for detecting whether or not the angle of view of the input video signal is the angle of view stored in the storage means, and the angle of view of the video signal input by the detection means is stored in the storage means. Display angle angle automatic adjustment means for automatically adjusting the display angle of view of the video signal so as to be stored in correspondence with the storage means when it is detected that the angle of view is Since it is configured, the angle of view can be automatically converted to the display angle of view preferred by the user.
[0044]
Furthermore, a frequency measuring means for measuring the frequency of the display angle of view adjusted by the display angle of view manual adjustment means, and a rewriting means for rewriting the storage contents of the storage means according to the frequency of the display angle of view measured by the frequency measuring means. Since it is provided and configured, it is possible to provide a display angle-of-view converter that is excellent in usability with a limited storage capacity.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a first embodiment of the present invention.
FIG. 2 is a flowchart for explaining the operation of the first embodiment of the present invention;
FIG. 3 is a diagram showing an example of the operation of the present invention.
FIG. 4 is a diagram illustrating an example of the operation of the present invention.
FIG. 5 is a diagram illustrating an example of a preset display angle of view.
FIG. 6 is a diagram illustrating an example of a display angle of view adjusted by a user.
FIG. 7 is a block diagram showing a second embodiment of the present invention.
FIG. 8 is a flowchart for explaining the operation of the second embodiment of the present invention;
FIG. 9 is a flowchart for explaining the operation of the second embodiment of the present invention;
FIG. 10 is a diagram for explaining a second embodiment of the present invention.
FIG. 11 is a diagram for explaining a conversion example of a display angle of view.
[Explanation of symbols]
1 Low-pass filter
2 Amplifier circuit
3 A / D converter
4 Microcomputer
5 Nonvolatile memory
6 angle of view switching circuit
7 Display devices
8 Operation part
9 Timer

Claims (3)

An angle-of-view detecting means for detecting an angle of view of the input video signal, and an image for switching a display angle of view when the video signal is displayed on the display unit according to the angle of view detected by the angle-of-view detecting means. In a display angle conversion device comprising an angle switching circuit and a display angle manual adjustment means for manually adjusting the display angle of view,
Storage means for storing the image angle of the video signal adjusted by the user with the display angle manual adjustment means and the display angle after the user has adjusted with the display angle manual adjustment means in association with each other. When,
Detecting means for detecting whether or not the angle of view of the input video signal is the angle of view stored in the storage means;
When the detection means detects that the angle of view of the input video signal is the angle of view stored in the storage means, the display angle of the video signal stored in correspondence with the storage means is stored. Automatic display angle adjustment means for automatically adjusting the angle of view;
Frequency measuring means for measuring the frequency of the display angle of view adjusted by the display angle of view manual adjustment means,
A display angle conversion device comprising: rewriting means for rewriting the storage contents of the storage means in accordance with the frequency of the display angle of view measured by the frequency measuring means. The frequency and the display angle converter according to claim 1, wherein the one at least one of the selected number or select time display viewing angle. The storage means
The angle of view of the video signal whose display angle of view has been adjusted by the display angle of view manual adjustment means, the display angle of view automatically adjusted by the display angle of view automatic adjustment means corresponding to this angle of view, and the display image A rewritable user registration area that stores the frequency of corners;
Rewriteable learning that stores the angle of view of the video signal whose display angle of view has been adjusted by the display angle manual adjustment means, the display angle of view adjusted according to this angle of view, and the frequency of this display angle of view. Work area,
The rewriting means is
When the maximum frequency of the display angle of view stored in the work area exceeds the minimum frequency of the display angle of view stored in the user registration area, instead of the stored content of the minimum frequency in the user registration area, display viewing angle conversion device according to the storage contents of the maximum frequency in the work area to claim 1 or 2, characterized in that writing to the user registration area.

Images