JP2000041159A - Video signal processing device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the optimum image emphasis processing in response to a reading mode and to improve the quality of an image to be displayed by applying the image emphasis processing to the supplied video signals by switching the prescribed set value according to an animation or a still picture of a read mode and displaying an image of the processed video signals in a read mode. SOLUTION: A CCD 2 stores the image data and then reads out the pixel data at the prescribed timing in accordance with a read mode to convert the pixel data into video signals. A camera signal processing circuit 6 applies the image emphasis processing to the video signals supplied from an image pickup means 2 by switching the prescribed set value in accordance with an animation or a still picture of a read mode. A microcomputer 8 supplies a control signal in accordance with a read mode to the means 2 and the circuit 6. Then a monitor 19 displays an image of video signals after the image emphasis processing is performed in a read mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to two types of displays for displaying video signals on a monitor for a television receiver (hereinafter referred to as "television") / a monitor for a personal computer (hereinafter referred to as "PC"). And a video signal processing method having a pixel data read mode.

[0002]

2. Description of the Related Art Conventionally, a camera-integrated video tape recorder (hereinafter, referred to as a "camera-integrated VTR") is composed of a camera unit and a VTR unit, and an image of a subject captured by the camera unit is converted into an electric signal. After being converted and subjected to predetermined signal processing by a VTR unit, the signal is magnetically recorded on a magnetic tape. Then, the video signal captured 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 the image of the video signal.

A video signal received by a television receiver is directly displayed as an image of a video signal on a television monitor, or a video signal captured by a camera-integrated VTR is transmitted to a television monitor via an external terminal. Supplied,
The image of the video signal was displayed. At this time,
A display mode for displaying a video signal on a television monitor is generally an interlace scanning mode in which a jump operation is performed for each horizontal line, which is suitable for displaying a moving image.

A display mode for displaying the above-described video signal on a personal computer monitor is generally a progressive scan mode in which horizontal lines are sequentially scanned. The progressive scanning mode is suitable for displaying a still image on a personal computer monitor, in contrast to the non-interlaced scanning mode in which horizontal lines are sequentially scanned.

In such a monitor for a television or a monitor for a personal computer, a signal processing circuit in the preceding stage of the monitor includes:
Aperture correction has been performed to make the image clear by performing edge correction of the image data.

Japanese Patent Application Laid-Open No. 5-83600 (Japanese Patent Application No.
No. 238286) discloses that, for a system based on the standards of interlaced television (NTSC, PAL, etc.), a first image quality correction signal output through a first aperture control signal processing circuit is used and a non-interlaced system is used. For a system based on the television standard, the second image quality correction signal output through the second aperture control signal processing circuit can be used, and the aperture control signal processing is performed according to each of the interlaced and non-interlaced systems. An image quality correction circuit that can be performed separately in a system is disclosed.

[0007]

However, in a television monitor in an interlaced scanning mode, for example, aperture correction is performed with a set value that optimizes the reproduction state of a moving image, and aperture correction with the same set value is performed. On a PC monitor in progressive scan mode,
For example, when playing back a still image, the image becomes extremely sharp.On the contrary, the aperture correction is performed with the optimal settings on a PC monitor in progressive scan mode, and the same settings are applied. When a moving image is reproduced on a television monitor in the interlaced scanning mode with the aperture correction described above, the image becomes too sharp and the display quality of the image deteriorates.

The present invention has been made in view of the above points, and has an image signal processing apparatus and an image signal processing apparatus capable of performing optimal aperture correction for a moving image or a still image in an interlaced scanning mode or a progressive scanning mode. It is intended to propose a signal processing method.

[0009]

In order to solve this problem, a video signal processing apparatus according to the present invention captures a subject via an optical system, accumulates the image as pixel data, and stores the image data at a predetermined timing according to a read mode. An image pickup unit that reads out the pixel data and converts the pixel data into a video signal; and a video signal supplied from the image pickup unit is switched by a predetermined set value according to a moving image or a still image in the readout mode to enhance the image. 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 a video signal after image enhancement processing generated by the signal processing means And display means for displaying the image in the readout mode.

Further, according to the video signal processing method of the present invention, an object is imaged by an imaging means via an optical system and stored as pixel data, and the pixel data is stored at a predetermined timing according to a read mode. Read and convert it into a video signal, and by a signal processing unit, perform switching and image enhancement processing on the video signal supplied from the imaging unit at a predetermined setting value according to a moving image or a still image in the read mode, The control means supplies a control signal corresponding to the readout mode to the imaging means and the signal processing means, and the display means displays an image of the image signal after the image enhancement processing generated by the signal processing means. , In the read mode.

According to the video signal processing device of the present invention, the following operations are performed. The pixel data in the signal processing means is determined in accordance with two shooting modes: a progressive scanning mode, which is a sequential pixel data reading mode for each horizontal line, and an interlaced scanning mode, which is an interlaced pixel data reading mode for every two horizontal lines. The setting value of the image enhancement processing by the aperture correction processing for performing the edge correction is automatically switched.

Further, the set value of the image enhancement processing of the aperture correction can be arbitrarily set by a predetermined operation in a factory preset or a user preset. In this manner, the image enhancement processing by the optimal aperture correction can be applied to each of the moving image or the still image in the two shooting modes of the progressive scanning mode and the interlaced scanning mode.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. The video signal processing apparatus according to the present embodiment changes the manner of performing aperture correction according to a moving image or a still image in the interlaced scanning mode and the progressive scanning mode.

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 subject condensed by a lens 1 constituting an optical system and a lens and accumulates the data as pixel data.
At a predetermined timing according to the read mode, a CCD (charge / charge) that reads pixel data and converts it into a video signal
Coupled device) 2, a timing generator (TG) 3 for supplying a timing signal for reading pixel data of the CCD 2, and a sampling and automatic gain control circuit for sampling and holding pixel data of a video signal and performing an automatic gain control process. 4 and an A / D converter 5 for converting pixel data of a video signal from an analog value to a digital value.

Further, the camera-integrated VTR according to the embodiment of the present invention uses a luminance signal (Y) and a chrominance signal (C) from a video signal.
And a gamma correction process is performed to make the light intensity in the photoelectric conversion of the CCD 2 and the light-to-light conversion of the monitor proportional to each other, and the luminance signal (Y) is changed according to a moving image or a still image in the interlace scanning mode or the progressive scanning mode. A camera signal processing circuit 6 that performs aperture correction processing of the set value and performs color processing such as white balance processing on the color signal (C), and continuously reads out every horizontal line in the progressive scanning mode. The pixel data of the video signal is transferred to odd lines (ODD) and even lines (EV).
EN) to generate a timing signal in the interlaced scanning mode or the progressive scanning mode in the timing generator (TG) 3 for performing the signal processing so as to separate the video signal in the interlaced scanning mode and passing the video signal in the interlaced scanning mode. The microcomputer 8 is configured to supply a control signal and a control signal to the camera signal processing circuit 6 for generating a set value of the aperture correction processing according to the interlace scanning mode or the progressive scanning mode.

The camera-integrated VTR according to the embodiment of the present invention has a display control circuit 9 for controlling image display.
A monitor 10 that displays an image in an interlaced scanning mode or a progressive scanning mode and that can be switched and connected via an external terminal; and a viewfinder 11 that displays an image captured by the CCD 2 for confirmation.
A memory control circuit 12 for controlling writing to a memory, a memory card 13 for recording and removing a still image displayed on the monitor 10 and a signal processing for magnetically recording an image captured by the CCD 2 VTR14 that performs
And a tape 15 which magnetically records a moving image picked up by the CCD 2 and is detachable.

Here, the camera signal processing circuit 6 and the progressive signal processing circuit 7 are each constituted by a single IC (integrated circuit).

In particular, in the present embodiment, the camera signal processing circuit 6 converts data for aperture correction in the vertical and horizontal directions with respect to the luminance signal (Y) of the input video signal into an interlaced scan mode. Alternatively, the value is added according to a set value corresponding to a moving image or a still image in the progressive scanning mode. Note that the interlaced scanning mode and the progressive scanning mode are shooting modes. In the present embodiment, however, in the present embodiment, for reading pixels from the CCD 2, the moving image mode in the interlaced reading mode, the moving image mode in the progressive reading mode, or the still image mode is used. Mode 3
Mode.

The thus-configured camera-integrated VTR according to the present embodiment 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 an aperture control operation in the interlace mode / progressive mode according to the present embodiment.

First, when the user selects the interlace mode by a switch (not shown) or the like, the microcomputer 8 recognizes that the microcomputer 8 is in the interlace mode in step S1, and in step S2, the timing generator (TG) 3 and the camera signal processing circuit. 6 are both set to the 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 the interlaced moving image.

More 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. In step S3, the aperture setting is not the factory preset shown in step S4. , The camera signal processing circuit 6 performs an aperture correction process of a relatively small set value in both the horizontal and vertical directions according to the moving image mode of the interlaced scanning mode. (Y).

Conversely, if the user selects the progressive mode by a switch or the like (not shown), the microcomputer 8 recognizes that the mode is the progressive mode in step S1, and the timing generator (TG) 3 and the camera are recognized in step S6. The signal processing circuits 6 are both set to the progressive mode. At the same time, the aperture correction data in the vertical and horizontal directions becomes the set value for progressive video or still image,
The microcomputer 8 supplies a control signal to the camera signal processing circuit 6.

More specifically, the CCD 2 reads out pixel data so as to sequentially scan every horizontal line at the timing of the progressive mode. In step S7, the aperture setting is not the factory preset shown in step S8. , The camera signal processing circuit 6 sets the aperture of a relatively large set value obtained by changing the balance in the horizontal or vertical direction that has been preset by the user according to the moving image mode or the still image mode of the progressive scanning mode. The correction processing is performed on the luminance signal (Y) of the video signal. For example,
In progressive video mode, the horizontal settings are relatively small and the vertical settings are relatively large,
In the progressive still image mode, the set value is relatively large in both the horizontal and vertical directions.

In the factory preset of steps S4 and S8, the set values of the aperture correction in the vertical and horizontal directions for the moving image or the still image in the two modes are set in advance so as to be optimal in reproducing the video signal. It is stored as control data in the memory of the computer 8 and cannot be arbitrarily changed by the user. However, in the user presets of steps S5 and S9, the user can arbitrarily change the aperture correction set value for each mode. it can.

Thus, in the TV monitor in the interlaced scanning mode, for example, aperture correction is performed with a relatively small set value in both the horizontal and vertical directions so as to optimize the reproduction state of the moving image, and the optimum reproduction of the moving image is performed. For example, on a personal computer monitor in the progressive scanning mode, for example, aperture correction is performed with a relatively large set value in both the horizontal and vertical directions so that the reproduction state of the still image is optimal, and the optimal still image reproduction is performed. Thus, in the reproduction of a still image that tends to be blurred, the image can be made clear and sharp. Also, on a monitor for a personal computer in a progressive scanning mode, aperture correction is performed with a relatively large set value in which the balance in the horizontal or vertical direction is changed so that a moving image is optimized, and a clearer moving image is reproduced. be able to.

Conversely, aperture correction is performed with relatively large horizontal and vertical setting values that are optimal for a personal computer monitor in the progressive scanning mode, so that optimal still image reproduction is performed, and progressive scanning is performed. Aperture compensation is performed with a relatively large set value that changes the balance in the horizontal or vertical direction so that it is optimal on a PC monitor in mode, and optimal movie playback is performed. Aperture correction is performed with a relatively small set value both horizontally and vertically so that the reproduction state of the image is optimized, and the image of the moving image is reproduced, the sharpness is reduced to obtain an optimal image, and the display quality of the image is improved. be able to.

The video signal processing apparatus according to the present embodiment captures an image of an object via an optical system, accumulates the data as pixel data, reads out pixel data at a predetermined timing according to a read mode, and converts the pixel data into a video signal. A CCD 2 serving as an image pickup means for converting, and a camera signal serving as a signal processing means for performing an image enhancement process by switching a video signal supplied from the image pickup means with a predetermined set value corresponding to a moving image or a still image in a reading mode. A processing circuit 6, a microcomputer 8 as a control means for supplying a control signal according to a read mode to the imaging means and the signal processing means, and an image of the video signal after the image enhancement processing generated by the signal processing means And the monitor 10 as a display means for displaying the pixel data in the read mode. Correspondingly it is possible to apply optimal image enhancement processing, whereby it is possible to improve the quality of the image displayed by the display means.

In the video signal processing apparatus according to the present embodiment, in the above description, the readout mode is a sequential pixel data readout mode for each horizontal line in the CCD 2 as the image pickup means, and a skipped pixel data readout for every two horizontal lines. In the sequential pixel data reading mode, the setting value of the image enhancement processing is set to a relatively large value so as to enhance the image so as to be suitable for displaying a still image. In the interlaced data reading mode, the image enhancement processing is performed. Can be set to a relatively small value to process the image so that it is suitable for displaying a moving image.

In the video signal processing apparatus according to the present embodiment, in the above description, the image enhancement processing in the camera signal processing circuit 6 as the signal processing means is an aperture correction processing for performing edge correction of pixel data. By setting the value of the image enhancement process to a relatively large value or a relatively small value in accordance with the data reading mode and performing processing to enhance or soften the image, an image optimal for each reading mode can be displayed.

In the video signal processing apparatus according to the present embodiment, the set 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. According to the user's preference, the image enhancement processing is set to a relatively large value or a relatively small value so that the image is emphasized or softened, and an image optimal for each user can be displayed.

In the video signal processing method according to the present embodiment, a subject is imaged via an optical system by a CCD 2 serving as an image pickup means, and is stored as pixel data at a predetermined timing corresponding to a read mode. The pixel data is read out and converted into a video signal, and the camera signal processing circuit 6 serving as a signal processing unit applies a predetermined setting value corresponding to a moving image or a still image in the reading mode to the video signal supplied from the imaging unit. The microcomputer 8 as a control means supplies a control signal corresponding to the readout mode to the imaging means and the signal processing means, and the monitor 10 as a display means performs the signal processing means. The image of the video signal after the image enhancement processing generated by is displayed in the readout mode. Optimal image enhancement processing can be subjected according to the read mode of the pixel data, thereby, it is possible to improve the quality of the image displayed by the display means.

In the video signal processing method according to the present embodiment, in the above description, the readout mode is a sequential pixel data readout mode for every one horizontal line in the CCD 2 as the image pickup means, and a skipped pixel data readout for every two horizontal lines. In the sequential pixel data reading mode, the setting value of the image enhancement processing is set to a relatively large value so as to enhance the image so as to be suitable for displaying a still image. In the interlaced data reading mode, the image enhancement processing is performed. Can be set to a relatively small value to process the image so that it is suitable for displaying a moving image.

In the video signal processing method according to the present embodiment, in the above description, the image enhancement processing in the camera signal processing circuit 6 as the signal processing means is an aperture correction processing for performing edge correction of pixel data. By setting the value of the image enhancement process to a relatively large value or a relatively small value in accordance with the data reading mode and performing processing to enhance or soften the image, an image optimal for each reading mode can be displayed.

In the video signal processing method according to the present embodiment, the set 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. According to the user's preference, the image enhancement processing is set to a relatively large value or a relatively small value so that the image is emphasized or softened, and an image optimal for each user can be displayed.

[0035]

According to the video signal processing apparatus of the present invention, a subject is imaged through an optical system and stored as pixel data.
An imaging unit that reads out the pixel data at a predetermined timing according to the readout mode and converts the pixel data into a video signal; and a video signal supplied from the imaging unit, the video signal being supplied from the imaging unit. Signal processing means for performing image enhancement processing by switching at the set value of
A control unit that supplies a control signal according to the readout mode to the imaging unit and the signal processing unit;
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, so that optimal image enhancement processing can be performed according to the pixel data readout mode. Thus, there is an effect that the quality of the image displayed by the display means can be improved.

Further, in the video signal processing apparatus of the present invention, in the above description, the readout mode is a sequential pixel data readout mode for every one horizontal line in the image pickup means and a skipped pixel data readout mode for every two horizontal lines. Therefore, in the sequential pixel data reading mode, the setting value of the image enhancement process is set to a relatively large value so as to enhance the image so as to be suitable for displaying a still image,
In the interlaced data read mode, there is an effect that the setting value of the image enhancement processing is set to a relatively small value so as to soften the image so as to be suitable for displaying a moving image.

Further, in the video signal processing apparatus according to the present invention, the image enhancement processing in the signal processing means is as follows.
Since this is an aperture correction process for performing edge correction of pixel data, the image enhancement process is performed such that a set value of the image enhancement process is set to a relatively large value or a relatively small value according to the pixel data read mode so as to emphasize or soften the image. There is an effect that an image can be displayed optimally in the reading mode.

Further, in the video signal processing apparatus according to the present invention, the set value of the image enhancement processing in the signal processing means can be arbitrarily set by a predetermined operation. Is set to a relatively large value or a relatively small value to process the image so that the image is emphasized or softened, so that an effect of displaying an image optimal for each user can be obtained.

Further, according to the video signal processing method of the present invention, a subject is imaged by an image pickup means via an optical system, and stored as pixel data, and the pixel data is stored at a predetermined timing in accordance with a read mode. Read and converted into a video signal, and by a signal processing unit, the video signal supplied from the imaging unit is switched by a predetermined set value according to a moving image or a still image in the reading mode, and subjected to image enhancement processing, The control means supplies a control signal corresponding to the readout mode to the imaging means and the signal processing means, and the display means displays an image of the image signal after the image enhancement processing generated by the signal processing means. ,
Because it was made to display in the above read mode,
Optimal image enhancement processing can be performed in accordance with the pixel data read mode, thereby providing an effect of improving the quality of an image displayed by the display means.

In the video signal processing method of the present invention, in the above description, the readout mode is a sequential pixel data readout mode for each horizontal line in the image pickup means, and an interlace pixel data readout mode for every two horizontal lines. Therefore, in the sequential pixel data reading mode, the setting value of the image enhancement process is set to a relatively large value so as to enhance the image so as to be suitable for displaying a still image,
In the interlaced data read mode, there is an effect that the setting value of the image enhancement processing is set to a relatively small value so as to soften the image so as to be suitable for displaying a moving image.

Further, in the video signal processing method of the present invention, the image enhancement processing in the signal processing means may be
Since this is an aperture correction process for performing edge correction of pixel data, the image enhancement process is performed such that a set value of the image enhancement process is set to a relatively large value or a relatively small value according to the pixel data read mode so as to emphasize or soften the image. There is an effect that an image can be displayed optimally in the reading mode.

Further, in the video signal processing method of the present invention, the setting value of the image enhancement processing in the signal processing means can be arbitrarily set by a predetermined operation. Is set to a relatively large value or a relatively small value to process the image so that the image is emphasized or softened, so that an effect of displaying an image optimal for each user can be obtained.

[Brief description of the drawings]

FIG. 1 is a camera-integrated VTR according to an embodiment of the present invention.
FIG. 3 is a block diagram showing the configuration of FIG.

FIG. 2 shows an interlace mode /
6 is a flowchart illustrating an operation of aperture control in a progressive mode.

[Explanation 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 view finder, 12 memory control Circuit, 13 ‥‥
Memory card, 14 VTR, 15 V tape

Continued on the front page F term (reference) 5C021 PA58 PA62 XB03 YB02 5C024 AA01 BA00 CA11 DA05 FA01 GA11 HA10 HA19 HA22 HA24 JA11 JA21 5C082 AA01 AA02 AA27 BA20 BA41 BC06 BC07 CA21 CA22 CA81 CA82 CB01 CB06 MM10

Claims (8)

[Claims] An imaging unit configured to image a subject via an optical system, accumulate the pixel data as pixel data, read the pixel data at a predetermined timing according to a read mode, and convert the pixel data into a video signal; A signal processing unit that performs image enhancement processing by switching the video signal supplied from the unit with a predetermined set value according to a moving image or a still image in the readout mode, and the imaging unit and the signal processing unit. Control means for supplying a control signal according to the readout mode, and display means for displaying, in the readout mode, an image of the video signal after image enhancement processing generated by the signal processing means. Characteristic video signal processing device. 2. The video signal processing device according to claim 1, wherein the readout mode is a sequential pixel data readout mode for each horizontal line and an interlace pixel data readout mode for every two horizontal lines in the imaging means. A video signal processing device. 3. The video signal processing apparatus according to claim 1, wherein the image enhancement processing in the signal processing means is an aperture correction processing for performing edge correction of pixel data. 4. The video signal processing apparatus according to claim 1, wherein a set value of the image enhancement processing in the signal processing means can be arbitrarily set by a predetermined operation. 5. An image capturing means captures an image of a subject via an optical system, stores the captured image as pixel data, reads out the pixel data at a predetermined timing according to a read mode, converts the pixel data into a video signal, and The processing means performs image enhancement processing on the video signal supplied from the imaging means by switching the video signal at a predetermined setting value corresponding to a moving image or a still image in the reading mode. A control signal corresponding to the read mode is supplied to the signal processing unit, and the display unit displays, in the read mode, an image of the video signal after the image enhancement process generated by the signal processing unit. A video signal processing method, characterized in that: 6. The video signal processing method according to claim 5, wherein the readout mode is a sequential pixel data readout mode for each horizontal line and an interlace pixel data readout mode for every two horizontal lines in the imaging means. A video signal processing method comprising: 7. The video signal processing method according to claim 5, wherein the image enhancement processing in the signal processing means is an aperture correction processing for performing edge correction of pixel data. 8. The video signal processing method according to claim 5, wherein a set value of the image enhancement processing in the signal processing means can be arbitrarily set by a predetermined operation.