JP4099551B2 - Video signal processing apparatus and video signal processing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides two pixel data readout modes for displaying video signals on a monitor for a television receiver (hereinafter referred to as “TV”) / monitor for a personal computer (hereinafter referred to as “PC”). The present invention relates to a video signal processing apparatus and a video signal processing method.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a camera-integrated video tape recorder (hereinafter referred to as a “camera-integrated VTR”) includes a camera unit and a VTR unit, and an image of a subject imaged by the camera unit is converted into an electrical signal. Thus, magnetic recording is performed on the magnetic tape after predetermined signal processing. Then, the video signal picked up by the camera unit or the video signal recorded on the magnetic tape by the VTR unit is reproduced and supplied to the monitor to display an image of the video signal.
[0003]
In addition, the video signal received by the television receiver is directly displayed on the TV monitor, or the video signal captured by the camera-integrated VTR is supplied to the TV monitor via an external terminal. The image of the video signal was displayed. At this time, the display mode when displaying the video signal on the television monitor is generally performed in an interlaced scanning mode suitable for moving image display and performing an interlace operation for each horizontal line.
[0004]
Further, the display mode when displaying the above-described video signal on the personal computer monitor is generally performed in a progressive scan mode in which horizontal lines are sequentially scanned. This progressive scan mode is suitable for displaying still images on a personal computer monitor, as compared to the non-interlaced scan mode in which horizontal lines are scanned sequentially.
[0005]
In such a television monitor or personal computer monitor, aperture correction is performed in the signal processing circuit in the previous stage of the monitor in order to perform edge correction of the image data and clear the image.
[0006]
In Japanese Patent Application Laid-Open No. 5-83600 (Japanese Patent Application No. 3-238286), a system according to the standard of interlaced television (NTSC, PAL, etc.) is output through a first aperture control signal processing circuit. The second image quality correction signal output through the second aperture control signal processing circuit can be used for a system based on the non-interlace television standard using the first image quality correction signal. There has been disclosed an image quality correction circuit capable of separately performing aperture control signal processing in each system in accordance with each interlace method.
[0007]
[Problems to be solved by the invention]
However, in the television monitor in the interlaced scanning mode, for example, in the monitor for the personal computer in the progressive scanning mode with the aperture correction of the same setting value, the aperture correction is performed with the setting value so that the reproduction state of the moving image is optimized. For example, when a still image is played back, the image will be very sharp. On the other hand, aperture correction is performed with a setting that is optimal for a personal computer monitor in progressive scan mode. When the moving image is reproduced on the television monitor in the interlaced scanning mode with the aperture correction of the above, there is an inconvenience that the image becomes too sharp and the display quality of the image is deteriorated.
[0008]
The present invention has been made in consideration of the above points, and a video signal processing apparatus and a video signal processing method capable of performing optimum aperture correction on a moving image or a still image in each of the interlace scanning mode and the progressive scanning mode. Is to try to propose.
[0009]
[Means for Solving the Problems]
In order to solve such a problem, the video signal processing apparatus of the present invention images a subject through an optical system, accumulates it as pixel data, reads out the pixel data at a predetermined timing according to a readout mode, and displays an image. With respect to the imaging means for converting into a signal and the video signal supplied from the imaging means, The setting values for vertical and horizontal contour correction are switched, and the readout mode is set in three modes of the moving image mode in the interlaced pixel reading mode and the moving image mode or the still image mode in the sequential pixel reading mode. To correct contour Signal processing means for performing processing, control means for supplying a control signal corresponding to the readout mode to the imaging means and the signal processing means, and generated by the signal processing means Contour correction And a display means for displaying the image of the processed video signal in the readout mode.
[0010]
In the video signal processing method of the invention, the subject is imaged by the imaging means via the optical system, accumulated as pixel data, and the pixel data is read out at a predetermined timing according to the readout mode. And the video signal supplied from the imaging means by the signal processing means, The setting values for vertical and horizontal contour correction are switched, and the readout mode is set in three modes of the moving image mode in the interlaced pixel reading mode and the moving image mode or the still image mode in the sequential pixel reading mode. To correct contour The control means supplies the control signal corresponding to the readout mode to the imaging means and the signal processing means by the control means, and the display means generates the signal processing means by the display means. Contour correction The image of the processed video signal is displayed in the readout mode.
[0011]
The video signal processing apparatus of the present invention operates as follows.
Pixel data in the signal processing means according to two imaging modes, a progressive scanning mode that is a sequential pixel data reading mode for each horizontal line in the imaging means and an interlace scanning mode that is an interlaced pixel data reading mode for every two horizontal lines. The set value of the image enhancement processing by the aperture correction processing for performing edge correction is automatically switched.
[0012]
In addition, the set value of the image enhancement processing for aperture correction can be arbitrarily set by a predetermined operation in a factory preset or a user preset.
In this way, image enhancement processing by optimum aperture correction can be applied to each of the moving images or still images in the two shooting modes of the progressive scanning mode and the interlace scanning mode.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. The video signal processing apparatus according to the present embodiment changes the way of performing aperture correction according to a moving image or a still image in the interlace scanning mode and the progressive scanning mode.
[0014]
FIG. 1 is a block diagram showing a configuration of a camera-integrated VTR according to an embodiment of the present invention.
In FIG. 1, a camera-integrated VTR according to an embodiment of the present invention captures reflected light of a lens 1 constituting an optical system and a subject collected by the lens, accumulates it as pixel data, and reads out a read mode. A CCD (Charge Coupled Device) 2 that reads out pixel data and converts it into a video signal at a predetermined timing according to the timing, and a timing generator (TG) 3 that supplies a timing signal for reading out the pixel data of the CCD 2; A sampling and automatic gain control circuit 4 that samples and holds pixel data of a video signal to perform automatic gain control processing, and an A / D converter 5 that converts the pixel data of the video signal from an analog value to a digital value. Composed.
[0015]
In addition, the camera-integrated VTR according to the embodiment of the present invention separates the luminance signal (Y) and the color signal (C) from the video signal, and makes the light intensity proportional to the photoelectric conversion of the CCD 2 and the electro-optical conversion of the monitor. Is subjected to γ correction processing, aperture correction processing is performed on the luminance signal (Y) according to a set value corresponding to a moving image or a still image in the interlace scanning mode or progressive scanning mode, and white balance processing is performed on the color signal (C). The camera signal processing circuit 6 that performs color processing such as the above, and the pixel data of the video signal read continuously every horizontal line in the progressive scanning mode are separated into odd lines (ODD) and even lines (EVEN) And a progressive signal processing circuit 7 for passing the video signal through in the interlaced scanning mode. A control signal for generating a timing signal for the interlaced scanning mode or progressive scanning mode in the ming generator (TG) 3 and a setting value for the aperture correction processing corresponding to the interlaced scanning mode or progressive scanning mode in the camera signal processing circuit 6 And a microcomputer 8 for supplying the control signal.
[0016]
Further, the camera-integrated VTR according to the embodiment of the present invention can be connected to the display control circuit 9 that performs control for image display, and can be switched and connected via an external terminal by displaying an image in the interlaced scanning mode or the progressive scanning mode. A monitor 10, a viewfinder 11 for displaying an image picked up by the CCD 2, a memory control circuit 12 for controlling writing to the memory, and a still image displayed on the monitor 10 for recording and removing. And a removable memory card 13, a VTR 14 that performs signal processing for magnetic recording of an image picked up by the CCD 2, and a tape 15 that can detach and record a moving image picked up by the CCD 2. The
[0017]
Here, the camera signal processing circuit 6 and the progressive signal processing circuit 7 are each constituted by a single IC (integrated circuit).
[0018]
Further, in particular, in the present embodiment, the camera signal processing circuit 6 uses the interlace scanning mode or the progressive scanning for the vertical and horizontal aperture correction data with respect to the luminance signal (Y) of the input video signal. The setting value is added according to the moving image or still image in the mode. Note that the interlace scanning mode and the progressive scanning mode are imaging modes, but in the present embodiment, the moving image mode or the still image in the moving image mode in the interlaced reading mode and the progressive reading mode is used for the pixel reading in the CCD 2. There are three modes.
[0019]
The camera-integrated VTR of this embodiment configured as described above operates as follows. In FIG. 2, the two modes will be described simply as an interlace mode / progressive mode. FIG. 2 is a flowchart showing the aperture control operation in the interlace mode / progressive mode of the present embodiment.
[0020]
First, when the user selects the interlace mode using a switch or the like (not shown), the microcomputer 8 recognizes that the microcomputer 8 is in the interlace mode in step S1, and in step S2, both the timing generator (TG) 3 and the camera signal processing circuit 6 are connected. Set to interlace mode. At the same time, the microcomputer 8 supplies a control signal to the camera signal processing circuit 6 so that the aperture correction data in the vertical direction and the horizontal direction become set values for interlaced moving images.
[0021]
Specifically, the CCD 2 reads out pixel data so as to perform interlaced scanning every two horizontal lines at the timing of the interlace mode, and in step S3, the aperture setting is not the factory preset shown in step S4, but step S5. Therefore, the camera signal processing circuit 6 performs an aperture correction process with a relatively small set value in both the horizontal and vertical directions according to the moving image mode of the interlace scanning mode, and the luminance signal (Y) of the video signal. To apply.
[0022]
Conversely, when the user selects the progressive mode using a switch or the like (not shown), the microcomputer 8 recognizes that the microcomputer 8 is in the progressive mode in step S1, and the timing generator (TG) 3 and the camera signal processing circuit in step S6. Both 6 are set to the progressive mode. At the same time, the microcomputer 8 supplies a control signal to the camera signal processing circuit 6 so that the aperture correction data in the vertical direction and the horizontal direction become set values for progressive moving images or still images.
[0023]
Specifically, the CCD 2 reads out the pixel data so as to sequentially scan every horizontal line at the timing of the progressive mode, and in step S7, the aperture setting is not the factory preset shown in step S8, but the step S9. Therefore, the camera signal processing circuit 6 performs aperture correction processing for a relatively large set value by changing the horizontal or vertical balance preset by the user in accordance with the moving image mode or the still image mode of the progressive scanning mode. This is applied to the luminance signal (Y) of the video signal. For example, in the progressive video mode, the set value in the horizontal direction is made relatively small and the set value in the vertical direction is made relatively large. In the progressive still image mode, the set value is made relatively large in both the horizontal and vertical directions. .
[0024]
Further, in the factory preset of steps S4 and S8, the setting values of the vertical and horizontal aperture corrections for the moving image or the still image in the two modes are set in advance in the microcomputer 8 so as to be optimal at the time of reproducing the video signal in advance. Although stored as control data in the memory and cannot be arbitrarily changed by the user, in the user presets in steps S5 and S9, the user can arbitrarily change the setting value of the aperture correction for each mode.
[0025]
Thereby, in the TV monitor in the interlace scanning mode, for example, the aperture correction is performed with a relatively small setting value in both the horizontal and vertical directions so that the reproduction state of the moving image is optimal, and the optimal moving image is reproduced. In a PC monitor in progressive scan mode, for example, aperture correction is performed with a relatively large setting value in both horizontal and vertical directions so that the playback state of the still image is optimal, and optimal still image playback is performed. When playing back still images, it is possible to make the image clear and sharp. Also, on a personal computer monitor in progressive scan mode, aperture correction is performed with a relatively large setting value that changes the balance in the horizontal or vertical direction so that the moving image is optimized, and a clearer moving image is reproduced. be able to.
[0026]
On the other hand, aperture correction is performed with a relatively large set value in both horizontal and vertical directions, which is optimal for a personal computer monitor in progressive scan mode, and optimal still images are played back. Also, a personal computer in progressive scan mode Aperture correction is performed with a relatively large setting value that changes the horizontal or vertical balance so that it is optimal for a monitor for optimal use, and optimal video playback is performed. Aperture correction is performed with a relatively small setting value for both horizontal and vertical so that the image becomes optimal, and the video image is played back, the sharpness is reduced to obtain the optimal video, and the display quality of the image can be improved. .
[0027]
The video signal processing apparatus according to the present embodiment captures an image of a subject via an optical system, accumulates it as pixel data, and reads out the pixel data and converts it into a video signal at a predetermined timing according to a readout mode. The camera signal processing circuit 6 as the signal processing means for performing the image enhancement processing by switching the CCD 2 as the means and the video signal supplied from the imaging means with a predetermined set value corresponding to the moving image or the still image in the reading mode. And a microcomputer 8 as a control means for supplying a control signal corresponding to the readout mode to the imaging means and the signal processing means, and an image of the image signal after the image enhancement processing generated by the signal processing means is read out. The monitor 10 is provided as a display means for displaying according to the mode, so it is optimal for the pixel data reading mode. Image enhancement processing can be subjected, thereby, it is possible to improve the quality of the image displayed by the display means.
[0028]
In the video signal processing apparatus of the present embodiment, in the above description, the readout modes are the sequential pixel data readout mode for each horizontal line and the interlaced pixel data readout mode for every two horizontal lines in the CCD 2 as the imaging means. Therefore, in the sequential pixel data reading mode, the image enhancement processing setting value is processed to be a relatively large value so that the image is emphasized to be suitable for still image display. In the interlaced data reading mode, the image enhancement processing setting value is set. Can be processed to soften the image with a relatively small value so that it is suitable for displaying moving images.
[0029]
In the video signal processing apparatus according to the present embodiment, since the image enhancement processing in the camera signal processing circuit 6 as the signal processing means is an aperture correction process for performing edge correction of pixel data in the above description, the pixel data read mode Accordingly, the image enhancement processing set value is set to a relatively large value or a relatively small value so that the image is enhanced or softened, and an image optimal for each readout mode can be displayed.
[0030]
Further, in the video signal processing apparatus of the present embodiment, since the setting value of the image enhancement processing in the camera signal processing circuit 6 as the signal processing means can be arbitrarily set by a predetermined operation in the above description, the user's preference can be obtained. Accordingly, it is possible to display the optimum image for each user by processing the image enhancement processing set value to be a relatively large value or a relatively small value so as to enhance or soften the image.
[0031]
Also, in the video signal processing method of the present embodiment, the subject is imaged via the optical system by the CCD 2 as the imaging means, accumulated as pixel data, and the pixel data at a predetermined timing according to the readout mode. Is converted into a video signal, and the camera signal processing circuit 6 serving as a signal processing unit switches the video signal supplied from the imaging unit with a predetermined setting value corresponding to a moving image or a still image in the reading mode. An image enhancement process is performed, a control signal corresponding to the reading mode is supplied to the imaging means and the signal processing means by the microcomputer 8 as the control means, and the signal processing means is generated by the monitor 10 as the display means. Since the image of the video signal after image enhancement processing is displayed in the readout mode, the pixel data Can be subjected to optimum image enhancement processing according to the read mode, this makes it possible to improve the quality of the image displayed by the display means.
[0032]
In the video signal processing method of the present embodiment, in the above description, the readout modes are the sequential pixel data readout mode for each horizontal line and the interlaced pixel data readout mode for every two horizontal lines in the CCD 2 as the imaging means. Therefore, in the sequential pixel data reading mode, the image enhancement processing setting value is processed to be a relatively large value so that the image is emphasized to be suitable for still image display. In the interlaced data reading mode, the image enhancement processing setting value is set. Can be processed to soften the image with a relatively small value so that it is suitable for displaying moving images.
[0033]
In the video signal processing method of the present embodiment, since the image enhancement processing in the camera signal processing circuit 6 as the signal processing means is an aperture correction process for performing edge correction of the pixel data in the above description, the pixel data read mode Accordingly, the image enhancement processing set value is set to a relatively large value or a relatively small value so that the image is enhanced or softened, and an image optimal for each readout mode can be displayed.
[0034]
Further, in the video signal processing method of the present embodiment, since the setting value of the image enhancement processing in the camera signal processing circuit 6 as the signal processing means can be arbitrarily set by a predetermined operation in the above description, the user's preference can be obtained. Accordingly, it is possible to display the optimum image for each user by processing the image enhancement processing set value to be a relatively large value or a relatively small value so as to enhance or soften the image.
[0035]
【The invention's effect】
The video signal processing apparatus of the present invention captures an image of a subject via an optical system, accumulates it as pixel data, reads the pixel data at a predetermined timing according to a read mode, and converts it into a video signal. A signal processing unit that performs image enhancement processing by switching the video signal supplied from the imaging unit with a predetermined setting value according to a moving image or a still image in the readout mode, the imaging unit, and the signal processing Control means for supplying a control signal corresponding to the readout mode to the means, and display means for displaying the image of the video signal after the image enhancement processing generated by the signal processing means in the readout mode. Therefore, it is possible to perform an optimal image enhancement process according to the pixel data reading mode, and display by the display means. An effect that it is possible to improve the quality of the image.
[0036]
In the video signal processing apparatus according to the present invention, in the above description, the readout mode is a sequential pixel data readout mode for each horizontal line and an interlaced pixel data readout mode for every two horizontal lines in the imaging unit. In the pixel data readout mode, the image enhancement processing setting value is set to a relatively large value so that the image is enhanced to be suitable for display of a still image. In the interlaced data readout mode, the image enhancement processing setting value is relatively There is an effect that processing can be performed so as to soften the image as a small value so as to be suitable for displaying a moving image.
[0037]
In the video signal processing apparatus of the present invention, since the image enhancement processing in the signal processing means is an aperture correction processing for performing edge correction of pixel data, the image enhancement processing is set according to the pixel data readout mode. By performing processing so that the image is emphasized or softened with a relatively large value or a relatively small value, it is possible to display an image optimal for each readout mode.
[0038]
In the video signal processing apparatus of the present invention, since the setting value of the image enhancement processing in the signal processing means can be arbitrarily set by a predetermined operation in the above, the setting value of the image enhancement processing according to the user's preference Is processed so that the image is emphasized or softened as a relatively large value or a relatively small value, so that an optimum image can be displayed for each user.
[0039]
In the video signal processing method of the present invention, the subject is imaged by the imaging means via the optical system, accumulated as pixel data, and the pixel data is read out at a predetermined timing according to the readout mode. The signal is converted into a signal, and the signal processing means switches the image signal supplied from the imaging means with a predetermined set value corresponding to the moving image or the still image in the readout mode, and performs image enhancement processing. A control signal corresponding to the readout mode is supplied to the imaging unit and the signal processing unit, and an image of the video signal after the image enhancement processing generated by the signal processing unit is read out by the display unit. Since the display is made according to the mode, the optimum image enhancement processing can be performed according to the pixel data reading mode. An effect that it is possible to improve the quality of the image displayed by the display means.
[0040]
In the video signal processing method of the present invention, in the above description, since the readout mode is a sequential pixel data readout mode for each horizontal line and an interlaced pixel data readout mode for every two horizontal lines in the imaging means. In the pixel data readout mode, the image enhancement processing setting value is set to a relatively large value so that the image is enhanced to be suitable for display of a still image. In the interlaced data readout mode, the image enhancement processing setting value is relatively There is an effect that processing can be performed so as to soften the image as a small value so as to be suitable for displaying a moving image.
[0041]
In the video signal processing method of the present invention, since the image enhancement processing in the signal processing means is an aperture correction processing for performing edge correction of pixel data, the image enhancement processing is set according to the pixel data readout mode. By performing processing so that the image is emphasized or softened with a relatively large value or a relatively small value, it is possible to display an image optimal for each readout mode.
[0042]
In the video signal processing method according to the present invention, since the setting value of the image enhancement processing in the signal processing means can be arbitrarily set by a predetermined operation in the above, the setting value of the image enhancement processing according to the user's preference. Is processed so that the image is emphasized or softened as a relatively large value or a relatively small value, so that an optimum image can be displayed for each user.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a camera-integrated VTR according to an embodiment of the present invention.
FIG. 2 is a flowchart showing an aperture control operation in an interlace mode / progressive mode according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lens, 2 ... CCD, 3 ... Timing generator (TG), 4 ... Sampling hold and automatic gain control circuit (S / H, AGC), 5 ... A / D converter, 6 ... Camera Signal processing circuit, 7 ... Progressive signal processing circuit, 8 ... Microcomputer, 9 ... Display control circuit, 10 ... Monitor, 11 ... Viewfinder, 12 ... Memory control circuit, 13 ... Memory card, 14 ... VTR, 15 ... tape

Claims (8)

An imaging unit that images a subject via an optical system, accumulates it as pixel data, reads the pixel data at a predetermined timing according to a readout mode, and converts the pixel data into a video signal;
The setting value for vertical and horizontal contour correction is switched for the video signal supplied from the imaging means, and the readout mode is skipped in the moving image mode in the pixel readout mode and the sequential pixel readout mode. A signal processing means for performing contour correction processing by switching setting values of three modes of a moving image mode or a still image mode ;
Control means for supplying a control signal corresponding to the readout mode to the imaging means and the signal processing means;
Display means for displaying the image of the video signal after the contour correction processing generated by the signal processing means in the readout mode;
A video signal processing apparatus comprising: The video signal processing apparatus according to claim 1, wherein
The setting value is a relatively small setting value in the moving image mode in the interlaced pixel reading mode, a relatively large setting value in the still image mode in the sequential pixel reading mode, and in the moving image mode in the sequential pixel reading mode. a video signal processing apparatus according to claim to Rukoto relatively large value. The video signal processing apparatus according to claim 2, wherein
The video signal processing characterized in that the relatively small setting value in the moving image mode in the interlaced pixel readout mode and the relatively large setting value in the still image mode in the sequential pixel readout mode are the same in both the vertical direction and the horizontal direction apparatus. The video signal processing apparatus according to claim 2, wherein
The video signal processing apparatus according to claim 1, wherein the relatively large set value of the moving image mode in the sequential pixel readout mode is a value obtained by changing a balance between a vertical direction and a horizontal direction . By imaging means, the subject is imaged via the optical system, accumulated as pixel data, read out at a predetermined timing according to the readout mode, converted into a video signal,
The signal processing means switches the setting values for vertical and horizontal contour correction for the video signal supplied from the imaging means, and the readout mode is a moving picture mode in the interlaced pixel readout mode and The contour correction processing is performed by switching the setting values of the three modes of the moving image mode or the still image mode in the sequential pixel readout mode ,
The control means supplies a control signal corresponding to the readout mode to the imaging means and the signal processing means,
An image signal processing method, wherein the display means displays the image of the image signal after the contour correction processing generated by the signal processing means in the readout mode. The video signal processing method according to claim 5, wherein
The setting value is a relatively small setting value in the moving image mode in the interlaced pixel reading mode, a relatively large setting value in the still image mode in the sequential pixel reading mode, and in the moving image mode in the sequential pixel reading mode. video signal processing method according to claim to Rukoto relatively large value. The video signal processing method according to claim 6.
The video signal processing characterized in that the relatively small setting value in the moving image mode in the interlaced pixel readout mode and the relatively large setting value in the still image mode in the sequential pixel readout mode are the same in both the vertical direction and the horizontal direction Method. The video signal processing method according to claim 6.
The video signal processing method, wherein the relatively large set value of the moving image mode in the sequential pixel readout mode is a value obtained by changing a balance between the vertical direction and the horizontal direction .

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