JPH10233978A - Wide television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the operability of aspect conversion in a wide television receiver. SOLUTION: An automatic aspect conversion instruction button is provided to a remote control transmitter 6 and when the button is depressed, a remote control reception circuit 5 and a remote control analysis microcomputer 4 discriminate the depression to activate an image analysis circuit 1. The image analysis circuit 1 analyzes a luminance level of a received video signal to detect presence or the like of a masked part and gives the result of analysis to an aspect conversion circuit 2. The aspect conversion circuit 2 converts the aspect ratio of a video image displayed on a cathode ray tube 3 according to an instruction by the image analysis circuit 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an aspect ratio of 16: 9.
The present invention relates to a wide television receiver having a wide aspect display screen, and more particularly to a wide television receiver having improved operability of aspect conversion.

[0002]

2. Description of the Related Art Recently, a wide television receiver (hereinafter, wide TV) having a 16: 9 aspect ratio wide-screen display screen has appeared, and as a video source, as shown in FIG. Sources in various modes, such as a Vista source having an aspect ratio of 4: 3 but having a non-image portion (mask portion) in the upper and lower portions, and a range in which an image exists (vertical size) are supplied. Have been.

An image source as shown in FIG.
If the image is displayed as it is, the image becomes a horizontally elongated image as shown in FIG. 5A. However, if the viewer manually sets the aspect conversion, as shown in FIG. The image in the range of the aspect ratio of 16: 9 is enlarged, and the display that makes full use of the wide-aspect image display unit can be performed. As described above, the wide TV is provided with the aspect conversion circuit so as to convert the aspect of the video according to the viewer's preference.

In a wide TV, an aspect ratio of 4: 3
There are various modes for displaying the video signal of the aspect ratio. For example, a mode of displaying the video signal having the aspect ratio of 4: 3 by compressing the time axis (or compressing the horizontal deflection width) (FIG. 6)
(A) Refer to the left side of the arrow).
No. 71 proposes a non-linear mode for enlarging only the left and right ends in the horizontal direction of a video signal having an aspect ratio of 4: 3 (see FIG. 6A), and a non-linear mode in the vertical direction of a video signal having an aspect ratio of 4: 3. A mode for enlarging and displaying a portion having an aspect ratio of 16: 9 (see FIG. 6B), enlarging a portion having an aspect ratio of 16: 9 in a vertical center portion of a video signal having an aspect ratio of 4: 3, and lowering the image. There is a mode (see FIG. 6C) in which the lower end is compressed in the vertical direction and displayed in order to put the subtitles existing in the non-picture part into the screen.

Assuming that there are, for example, four modes for displaying a video signal having an aspect ratio of 4: 3 in a conventional wide TV, the remote control transmitter has P1 to P4 corresponding to those modes as shown in FIG. Four aspect designation buttons, P4, are provided, and the viewer determines which mode is appropriate for the video each time the video source is switched, and presses the aspect designation button corresponding to the mode to switch the aspect. Conversion was being performed. Further, since the upper and lower mask widths are not always constant, the viewer manually shifts the vertical position of the image as necessary.

[0006]

As described above, in the conventional wide-screen TV, the viewer manually includes mode conversion and adjustment of the vertical position and the vertical amplitude in accordance with the video source every time the video source is switched. However, there is a problem that a so-called aspect conversion for changing the display mode on the display screen must be operated, and an extremely complicated operation is required. Furthermore, there is a possibility that the number of modes for displaying a video signal having an aspect ratio of 4: 3 will increase in the future, and in that case, an aspect designation button corresponding to the mode must be further provided in the remote control transmitter. However, there is also a problem that the usability is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to improve the operability of aspect conversion in a wide television receiver having a 16: 9 aspect ratio wide-screen display screen. And

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention analyzes a wide aspect display screen having an aspect ratio of 16: 9 and a luminance level of an incoming video signal. A wide-screen television comprising an image analysis circuit for analyzing whether or not the image has at least a mask portion above and below, and an aspect conversion circuit for changing an aspect of the incoming video signal displayed on the display screen. In the John receiver, an automatic aspect conversion instruction button is provided on the remote control transmitter or the receiver main body, and a judging means for judging whether or not an instruction has been made by the automatic aspect conversion instruction button is provided. When done, the image analysis circuit is operated to analyze the luminance level of the incoming video signal. At least the top and bottom of the image are analyzed to determine whether the image is present, and the analysis result is input to the aspect conversion circuit to convert the aspect of the image displayed on the display screen. To provide a wide-screen television receiver.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a wide-screen television receiver according to the present invention. FIG. 1 is a block diagram showing one embodiment of a wide television receiver of the present invention, FIG. 2 is a diagram showing one example of a remote control transmitter used in the wide television receiver of the present invention, and FIG. 3 is a wide television of the present invention. It is a figure for explaining operation of a John receiver.

In FIG. 1, an incoming video signal is input to an image analysis circuit 1 and an aspect conversion circuit 2. The image analysis circuit 1 analyzes the luminance level by taking in an incoming video signal, for example, vertical data at different horizontal positions over a plurality of fields, and analyzes whether the image has a mask portion at the top and bottom or a mask at the top and bottom. If the image has a portion, it is analyzed whether or not the image has a caption in the mask portion. The circuit configuration and algorithm of the image analysis circuit 1 are described in “Screen Size Adjustment Apparatus” filed by the present applicant on October 20, 1993 (Japanese Patent Application No. 5-285862 (see Japanese Patent Application Laid-Open No. 7-170425). )), The description is omitted here.

The image analysis circuit 1 analyzes the input video signal and inputs the result to the aspect conversion circuit 2. The aspect conversion circuit 2 converts the aspect of the input video signal according to an instruction from the image analysis circuit 1 or an instruction from the remote control analysis microcomputer 4, and supplies it to the CRT 3.

On the other hand, the remote controller transmitter 6 is provided with an automatic aspect conversion instruction button as shown in FIG. 2 as an example, and when the viewer presses the automatic aspect conversion instruction button, the remote control receiving circuit 5 Remote control transmitter 6
The transmitted signal is received and the information is input to the remote control analysis microcomputer 4. When the remote control analysis microcomputer 4 determines that the automatic aspect conversion instruction button of the remote control transmitter 6 has been pressed and the automatic aspect conversion instruction has been issued,
The remote control analysis microcomputer 4 instructs the image analysis circuit 1 to analyze an image. The image analysis circuit 1 analyzes the input video signal according to this command, and determines whether or not there is an upper and lower mask portion (and the width of the upper and lower mask portions, if any).
Then, the presence / absence of subtitles in the upper and lower mask portions is analyzed, and a command is issued to the aspect conversion circuit 2 so as to obtain an optimum aspect.

Although only the automatic aspect conversion instruction button is shown in FIG. 2, an automatic aspect conversion instruction button may be provided in addition to the aspect designation buttons corresponding to each mode as shown in FIG. .
In this case, when a predetermined aspect (mode to) is selected by the aspect designation button, the remote control receiving circuit 5 receives the signal, and the remote control analyzing microcomputer 4 directly issues a command to the aspect conversion circuit 2.

When the automatic aspect conversion instruction button is pressed in the wide television receiver of the present invention having the above-described configuration, the image analysis circuit 1 analyzes the input video signal as described above, and FIG. As shown in the example, when there is no upper / lower mask portion, the above-described mode is set. When there is an upper / lower mask portion and no subtitle exists in the mask portion below the image (subtitles exist inside the image), the mode is set. If there is a mask portion and subtitles exist in the mask portion below the image, a command is issued to the aspect conversion circuit 2 to set the mode, and the aspect is converted. As a result, the mode is set according to the input video signal.

Further, the wide television receiver of the present invention operates as follows. As an example, if there is no upper and lower mask portion, and the second automatic aspect conversion instruction button is pressed, the image analysis circuit 1 again determines that the aspect ratio is 4: 3 (there is no upper and lower mask portion) and 1
A command is issued to the aspect conversion circuit 2 to set the mode to a mode (for example, a mode) different from the first mode to convert the aspect. Therefore, when the (third) automatic aspect conversion instruction button is pressed again, the aspect ratio is determined to be 4: 3 (there is no upper and lower mask portion), and a different mode (for example, mode ) To the aspect conversion circuit 2 to convert the aspect. As described above, when there is no upper / lower mask portion, the mode is set first, but when the automatic aspect conversion instruction button is further pressed, the mode is sequentially changed, for example, mode → mode →. Thus, even if the viewer is not satisfied with the first aspect conversion, another mode can be set by further pressing the automatic aspect conversion instruction button. A mode priority may be set for each of the case where there is no upper and lower mask portions and the case where there are upper and lower mask portions, and the mode may be sequentially changed according to the priority order.

Further, changes in the viewing environment such as channel switching, audio mode switching (stereo, monaural, after two countries), input source switching (tuner input, external input), etc., are detected. It is more convenient to operate the image analysis circuit 1 even if the automatic aspect conversion instruction button is not pressed. Note that channel switching and input source switching are performed by the remote control analysis microcomputer 4.
Can be easily determined, and the switching of the audio mode can be easily determined by the microcomputer.

In the above-described embodiment, the remote controller transmitter 6 is provided with the automatic aspect conversion instruction button. However, it is needless to say that the automatic aspect conversion instruction button may be provided on the main body of the television receiver. . Further, in the above description, only the modes are described. However, the aspect conversion in the present invention is different from the aspect conversion in the present invention in that the display mode of the video signal including the mode conversion and the adjustment of the vertical position and the vertical amplitude on the display screen is different. For example, a mode obtained by adding a vertical position to a mode may be used as another mode, and the aspect conversion of the present invention is not limited to the present embodiment.

[0018]

As described in detail above, the wide television receiver of the present invention is provided with an automatic aspect conversion instruction button on the remote control transmitter or the receiver main body, and is instructed by the automatic aspect conversion instruction button. When an instruction is given by the automatic aspect conversion instruction button, an image analysis circuit is operated to analyze an incoming video signal, and the analysis result is input to the aspect conversion circuit to display the display screen. Since the aspect of the video to be displayed is changed, the viewer can display the video in the optimum aspect without performing a complicated operation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a remote control transmitter used in the present invention.

FIG. 3 is a diagram for explaining the operation of the present invention.

FIG. 4 is a diagram showing a landscape image in which upper and lower portions are masked.

FIG. 5 is a diagram illustrating a display example by a wide television receiver.

FIG. 6 is a diagram for explaining aspect conversion.

FIG. 7 is a diagram showing an example of a remote control transmitter used in a conventional wide television receiver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image analysis circuit 2 Aspect conversion circuit 3 CRT 4 Remote control analysis microcomputer 5 Remote control receiving circuit 6 Remote control transmitter

Claims (1)

[Claims] An image analysis circuit for analyzing a display screen of a wide aspect having an aspect ratio of 16: 9 and a luminance level of an incoming video signal to determine whether or not the image has at least a mask portion above and below. And an aspect conversion circuit for changing an aspect of the incoming video signal displayed on the display screen, wherein an automatic aspect conversion instruction button is provided on the remote control transmitter or the receiver main body. Also, a determination means is provided for determining whether or not an instruction has been made by the automatic aspect conversion instruction button. When the instruction is made by the automatic aspect conversion instruction button, the image analysis circuit is operated to activate the brightness of the incoming video signal. Analyze the level and analyze at least whether the image has a mask part at the top and bottom, Wide television receiver characterized by being configured to convert the aspect of the image to be displayed on the display screen of the analysis result is input to the aspect ratio conversion circuit.