JP3103160B2 - Image information processing apparatus and method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image information processing apparatus for synthesizing character information with image information whose aspect ratio has been converted, and a method therefor.

[0002]

2. Description of the Related Art A conventionally known camera-integrated V
A TR (video tape recorder) or the like has a function of superimposing and recording information such as a title on a screen by synthesizing an image signal and a character signal.

In addition, a lens for optically compressing a screen in a horizontal direction is attached to a lens of a video camera,
It is known that a picture is taken and recorded while changing the aspect ratio of the screen, and the image is reproduced on a wide aspect type monitor whose aspect ratio is larger than that of the conventional one.

FIG. 4 is a block diagram showing the above-mentioned VTR and image monitor. In the conventional example shown in this figure, first, the video signal a and the synchronization signal Syn are transmitted from the video camera 1.
c is output and supplied to the synthesizing circuit 2 and the character generating circuit 3, respectively. The character generating circuit 3 controls the character signal b synchronized with the synchronizing signal Sync under the control of the microcomputer 4.
Is output. The character signal b and the video signal a are combined by the combining circuit 2 to become a video signal c.

[0005] The synthesized video signal is recorded or reproduced by the video tape recorder 5 as it is, or becomes an output signal, and is an NTSC system receiver 9 having a normal aspect ratio or a receiver 10 having a horizontally long display screen.
Is input to

At this time, the video signals a, b, c of the respective parts and the monitor images d, e are as shown in a to e of FIG.
That is, in the NTSC system receiver 9, as shown in FIG. 3D, the screen and the synthesized title are displayed without any graphic distortion. On the other hand, in the receiver 10 having a horizontally long display screen, as shown in FIG. 3E, no-signal portions appear at both ends of the screen, but the screen and the synthesized title are displayed without graphic distortion.

Next, when an anamorphic lens (a lens that produces an image having different magnifications in the vertical and horizontal directions on the image plane) 7 is mounted on the video camera 1 and the captured image is optically compressed in the horizontal direction, The video signals a, b, c of each part are shown in FIG.
It looks like (ro). In both the normal receiver 9 and the receiver 10 having a horizontally long display screen, the entire screen is expanded and displayed in the horizontal direction, so that a screen free from graphic distortion is obtained as the display screen. But,
As shown in d and e in FIG. 3B, the synthesized title is wider than the original title by the extent of the expansion, and is monitored.

[0008]

As described above, the picture signal obtained by optically compressing the screen and changing the aspect ratio is expanded in the horizontal direction at the time of monitoring to reproduce an image free from graphic distortion. Is done.

However, a monitor device having a display screen of a wide aspect (that is, a length in the horizontal direction of the aspect ratio of the screen) or a monitor device having a normal aspect ratio is synthesized into an image. Since the information such as the title, which has been expanded at the time of monitoring, is displayed in a manner wider than that at the time of recording, there is a drawback that the information becomes different from the original shape.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to combine graphic information such as a title with image information whose aspect ratio has been changed so that a graphic distortion occurs in the character information when the image information is reproduced. It is an object of the present invention to provide an image information processing apparatus and a method therefor.

[0011]

Means for Solving the Problems The above-mentioned problems are solved,
In order to achieve the above object, an image information processing apparatus according to the present invention comprises: an input unit for inputting image information representing an image whose aspect ratio has been changed by compressing a screen in a horizontal direction; Character information generating means for generating character information subjected to compression processing in a direction, and synthesizing means for synthesizing the image information input by the input means and the character information generated by the character information generating means. Features. Further, in the image information processing method according to the present invention, image information representing an image whose aspect ratio has been changed by compressing a screen in a horizontal direction is input, and text information subjected to compression processing in the same direction as the image is input. Causes
The image information and the character information are combined.

[0012]

[0013]

Embodiments of the present invention will be described below in detail.

Embodiment 1 FIG. 1 shows a first embodiment to which the present invention is applied. In the figure, 1 is a video camera, 2 is a circuit for synthesizing a video signal a and a title signal b, 3 is a character generation circuit for generating a title signal b, 4 is a character generation circuit 3 and a clock generation circuit 6 to be described later. A microcomputer 5, a video recorder for recording a video signal c, 6 a character generating circuit 3
Is a clock generation circuit that is used as a reference signal.

Numeral 7 is a detachable, optically changing the aspect ratio of the screen optically (in other words, optically compressing the horizontal image information in order to widen the horizontal angle of view). Anamorphic lens). A detection circuit 8 detects whether or not the anamorphic lens 7 is attached.

Reference numeral 9 denotes a receiver having a display screen having an aspect ratio (aspect ratio) specified by the current NTSC system;
Reference numeral 10 denotes a receiver having a horizontally long display screen.

In the embodiment shown in FIG. 1, first, a video signal a and a synchronizing signal Sync are output from the video camera 1 and supplied to the synthesizing circuit 2 and the character generating circuit 3, respectively. The character generation circuit 3 outputs a character signal b synchronized with the synchronization signal Sync under the control of the microcomputer 4. The character signal b and the video signal a are combined by the combining circuit 2 to become a video signal c.

The operation described above is the same as that of the conventional example shown in FIG. The operation peculiar to the present embodiment is that the detection circuit 7 detects the attachment of the anamorphic lens 7, and in response to the detection result, the microcomputer 4 shortens the clock cycle for character generation (that is, the character generation circuit 3).
Only the width of the character generated by the compression).

The operation will be described in more detail below with reference to FIG.

According to the present embodiment shown in FIG. 1, during normal photographing without using the anamorphic lens 7, the screen shown in FIG. 3A can be obtained as described above as the prior art. On the other hand, when the detection of the anamorphic lens 7 is performed by the detection circuit 8, the clock generation circuit 6 is controlled to increase the frequency of the generated clock in accordance with the rate of expansion of the screen (extension during monitoring). The width of the title character is compressed as shown in FIG.

As a result, as shown in FIGS. 3 (d) and 3 (e), the screen is synthesized regardless of whether the video signal is expanded and displayed on the normal receiver 9 or the receiver 10 having a horizontally long display screen. No figure distortion occurs in the title.

Embodiment 2 FIG. 2 shows a second embodiment of the present invention. In the figure,
A switch 11 is switched by the microcomputer 4 and a compression circuit 12 compresses a character signal.
In addition, the same blocks as those in FIG. 1 are denoted by the same reference numerals as those in FIG.

Next, the operation of this embodiment will be described.
At the time of normal photographing without using the anamorphic lens 7, the microcomputer 4 controls the switch 11 so as to switch to the character generating circuit 3 side. 3), the combined character signal is correctly displayed on both the normal image receiver 9 and the image receiver 10 having a horizontally long screen without any graphic distortion.

Next, when the detection circuit 8 detects that the anamorphic lens 7 is mounted, the microcomputer 4 controls the switch 11 to switch to the compression circuit 12 side. The compression circuit 12 compresses the title signal output from the character generation circuit 3 in accordance with the expansion rate of the screen, and outputs it as shown in FIG. The video signal c synthesized in this way is shown in FIG.
As in d and e, the video signal is expanded in both the normal receiver 9 and the receiver 10 having a horizontally long display screen.
The screen and the synthesized title are displayed without any graphic distortion.

[0025]

As described above, according to the present invention,
Even when character information is combined with image information whose aspect ratio has been changed by compressing the screen in the horizontal direction, graphic distortion can be prevented from occurring in the combined character during image reproduction.

[Brief description of the drawings]

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

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram schematically showing a state of a video signal and a display screen.

FIG. 4 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Video camera 2 Composition circuit of video signal and title signal 3 Character generation circuit for generating title signal 4 Microcomputer 5 Video recorder 6 Clock generation circuit for outputting reference signal of character generation circuit 3 7 Removable optically Anamorphic lens for widening the angle of view in the horizontal direction to change the aspect ratio of the screen 8 Detection circuit for detecting whether or not the anamorphic lens 7 is attached 9 Normal receiver 10 Receiver having a horizontally long display screen 11 Switch 12 A compression circuit that compresses character signals

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04N 5/278 H04N 5/225

Claims (2)

(57) [Claims] 1. An input means for inputting image information representing an image whose aspect ratio has been changed by compressing a screen in a horizontal direction, and generating character information subjected to compression processing in the same direction as the image. An image information processing apparatus comprising: character information generating means; and synthesizing means for synthesizing image information input by the input means and character information generated by the character information generating means. 2. Inputting image information representing an image whose aspect ratio has been changed by compressing a screen in a horizontal direction, generating character information subjected to a compression process in the same direction as the image, An image information processing method comprising combining information and the character information.