JP2003032636A - Main scanning conversion equipment using movement compensation and main scanning conversion method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize main scanning conversion of high image quality wherein deterioration of image is restrained when a movement vector different from actual movement is detected in movement compensation type scanning conversion. SOLUTION: This main scanning conversion equipment 1 for converting an interlace signal to a sequential scanning image signal is provided with an interpolation part 3 for a still image which produces an interpolation signal between fields, an interpolation part 2 for a moving image which produces an interpolation signal in a field, a movement vector detecting part 4 for detecting a movement vector, a reinforcement signal producing part 5 for producing a reinforcement signal, a reinforcement signal adding part 6 which produces a reinforced interpolation signal in a field by adding the reinforcement signal to the interpolation signal in a field, a movement detecting part 7 for detecting moving amount, a movement adaptation adding part 8 which produces a movement adapting interpolation signal by switching over an adding ratio between the interpolation signal in a field and the interpolation signal between fields in accordance with the moving amount, and double-speed process part 9 which performs time axis compression and time series alignment change of the interlace signal and the movement adapting interpolation signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image scanning (format) conversion device and a scanning conversion method, and more particularly to a main scanning conversion device for converting an interlaced scanning type image signal into a progressive scanning type image signal. The present invention relates to a main scanning conversion method.

[0002]

2. Description of the Related Art When an interlaced scanning signal (for example, an NTSC signal) is displayed on a progressive scanning type display device, it is necessary to perform scan conversion.

As a scan conversion method, an interpolation signal is used by using a signal in a field as described in P139-144 of Clear Vision Handbook (supervised by the Technical Division, Broadcast Administration Bureau, Ministry of Posts and Telecommunications, edited by Clear Vision Promotion Council). There are known inter-field interpolation for generating a signal, inter-field interpolation using a signal one field before, and motion adaptive scanning conversion for changing the mixing ratio according to the amount of motion. However, it is known that in the motion adaptive scan conversion, the vertical resolution in the moving image area is lower than that in the still image area.

A method has been devised to improve the vertical resolution of the moving image area as compared with the above conversion method. For example,
There is known a motion-compensated scan conversion as shown in Japanese Patent Laid-Open No. 005947, etc., in which a motion vector is detected for each block, and a signal is moved from the previous field as it is according to the motion vector to perform interpolation and progressive scanning.

[0005]

In the conventional motion-compensated scan conversion, high-quality scan conversion can be performed when an appropriate motion vector corresponding to the actual motion of the object in the image is detected. Is. However, in this motion-compensated scan conversion, when a motion vector different from the actual motion is detected, interpolation processing is performed using the wrong image signal from the previous field, resulting in severe image quality degradation. It may end up. This problem can be suppressed to some extent by improving the accuracy of motion vector search, but it is difficult to detect a proper motion vector completely.

According to the present invention, when an appropriate motion vector is detected during main scanning conversion, high-quality scanning conversion equivalent to normal motion-compensated scanning conversion is performed, so that a motion different from the motion of an object in an image can be obtained. An object of the present invention is to provide a main scanning conversion device and a main scanning conversion method that perform high resolution and high quality main scanning conversion in which deterioration of image quality is suppressed even when an appropriate motion vector is detected. Another object of the present invention is to provide a main scanning conversion device and a main scanning conversion method that perform natural main scanning conversion from a still image to a moving image by combining with motion adaptive processing.

Further, the present invention provides an image signal display device using the above main scanning conversion device, which suppresses deterioration of image quality and performs high resolution and high image quality and which performs natural main scanning conversion from still images to moving images. The purpose is to

[0008]

In order to achieve the above object, the following technical means are used in the present invention.

In a main scanning conversion device for converting an interlaced scanning image signal into a progressive scanning image signal, a still image interpolating unit for generating an interfield interpolation signal from the interlaced scanning image signal, and an intrafield interpolation signal for the interlaced scanning signal. And a motion vector detection unit that detects a motion vector for each block unit of m × n pixels (m and n are natural numbers) from two or more images separated by one field or more and outputs the motion vector. , A reinforcement signal generation unit that generates a reinforcement signal by performing vertical high-pass filter processing on a video signal in a region obtained from the motion vector, and a reinforcement signal addition that adds the reinforcement signal generated by the reinforcement signal generation unit to an interpolation signal Unit, a motion detection unit that detects the motion amount of the image and outputs the motion amount, and a motion detection unit that outputs the motion amount according to the motion amount output from the motion detection unit. Main scanning is equipped with a motion adaptive adder that switches the mixing ratio of interpolation signals, and a double speed processing unit that performs time-axis compression and time-sequential rearrangement of interlaced scanning signals and interpolation signals to generate progressive scanning image signals. A conversion device is configured to perform main scanning conversion.

Among these, the reinforcement signal is a signal of a high frequency component, and it is possible to generate an interpolation signal having a good frequency characteristic by adding it to the interpolation signal having a low frequency component in the reinforcement signal adding section. Is.

The present invention also provides a main scanning conversion device for converting an interlaced scanning image signal into a progressive scanning image signal,
A still image interpolation unit that generates an inter-field interpolation signal from an interlaced scanning image signal, a moving image interpolation unit that generates an intra-field interpolation signal from an interlaced scanning image signal, and a motion of the interlaced scanning image signal is detected and a motion amount is output. A motion detection unit, and a motion adaptive addition unit that generates a motion adaptive interpolation signal by switching the addition ratio of the inter-field interpolation signal and the intra-field interpolation signal according to the amount of motion output from the motion detection unit; A motion vector detection unit that detects a motion vector for each block unit of m × n pixels (m and n are natural numbers) from two or more images separated by more than a field and outputs the motion vector, and the motion vector detection unit outputs the motion vector. Reinforcement signal generation by applying vertical high-pass filter processing to the interlaced scan image signal of the area obtained from the motion vector A gain control unit for controlling the gain of a reinforcement signal according to the amount of movement of the image to generate a gain-controlled reinforcement signal; and adding the gain-controlled reinforcement signal to the motion adaptive interpolation signal for reinforcement. A reinforcement signal addition unit that generates a motion adaptive interpolation signal, and a double speed processing unit that generates a progressive scanning image signal by performing time-axis compression and time series rearrangement of the interlaced scanning image signal and the reinforced motion adaptive interpolation signal. Prepared

According to the present invention, the gain control unit for controlling the gain of the reinforcement signal according to the amount of movement of the image and generating the gain-controlled reinforcement signal is provided, and the interpolation signal is added in the reinforcement signal addition unit. By adding and, it is possible to generate an appropriate interpolation signal.

Further, the present invention comprises an image signal display device such as a television receiver provided with the main scanning conversion device.

Further, according to the present invention, in the main scanning conversion method for converting an interlaced scanning image signal into a progressive scanning image signal, an interfield interpolation signal is generated from the interlaced scanning image signal and an intrafield interpolation signal is generated from the interlaced scanning signal. However, m from 2 or more images separated by 1 field or more
A motion vector is detected for each block unit of × n pixels (m and n are natural numbers), a motion vector is generated, and a vertical high-pass filter process is applied to an interlaced scan image signal of an area obtained from the motion vector to obtain a reinforcement signal. The generated interpolating signal is generated and added to the intra-field interpolating signal to generate the inter-field interpolating signal reinforced, the motion amount of the interlaced scanning image is detected, and the motion amount is output, and the motion amount is output according to the motion amount. A motion adaptive interpolation signal is generated by switching the addition ratio of the inter-field interpolation signal and the inter-field interpolation signal, and the interlaced scanning image signal and the time-axis compression and time-sequential rearrangement of the motion adaptive interpolation signal are performed to sequentially scan the image. A signal is generated.

The present invention also provides a main scanning conversion method for converting an interlaced scanning image signal into a progressive scanning image signal,
An inter-field interpolation signal is generated from an interlaced scanning image signal, an intra-field interpolation signal is generated from an interlaced scanning signal, a motion of the interlaced scanning image signal is detected, a motion amount is output, and the inter-field interpolation signal is calculated according to the motion amount. A motion adaptive interpolation signal is generated by switching the addition ratio between the signal and the intra-field interpolation signal, and the motion adaptive interpolation signal is moved for each block unit of m × n pixels (m and n are natural numbers) from two or more images separated by one field or more. Detect the vector and output the motion vector,
A reinforcement signal is generated by applying vertical high-pass filter processing to the interlaced scanning image signal of the area obtained from the motion vector, and the gain of the reinforcement signal is controlled according to the amount of motion of the image to obtain the gain-controlled reinforcement signal. Generating and adding the gain-controlled augmentation signal to the motion adaptive interpolation signal to produce an augmented motion adaptive interpolation signal, and interlaced scanning image signal and time axis compression and time of the augmented motion adaptive interpolation signal. The sequence is rearranged to generate a progressive scanning image signal.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The configuration of a main scanning conversion device according to a first embodiment of the present invention will be described with reference to FIG. The main scanning conversion device 1A includes a moving image interpolation unit 2, a still image interpolation unit 3, a motion vector detection unit (hereinafter also referred to as an MV detection unit) 4, a reinforcement signal generation unit 5, and a reinforcement signal addition unit. 6
A motion detector 7, a motion adaptive adder 8, a double speed processor 9, a first 1-field delay unit 11, a second 1-field delay unit 12, and a third 1-field delay unit 13. Configured.

The interlaced scanning type video input signal Si is inputted to the motion detecting section 7 and the first one-field delay section 11, and the double speed processing section 9 outputs the progressive scanning type video output signal So.
Is output.

Output S1 of the first 1-field delay unit 11
The second 1-field delay unit 12 and the moving image interpolation unit 2
Is output to the MV detection unit 4 and the double speed processing unit 9. Second
The output S2 of the 1-field delay unit 12 is output to the third 1-field delay unit 13, the still image interpolation unit 3, the reinforcement signal generation unit 5, and the motion detection unit 7. The output S3 of the third one-field delay unit 13 is output to the MV detection unit 4.

The output Sm of the moving picture interpolating section 2 is outputted to the reinforcing signal adding section 6. The output Ss of the still image interpolation unit 3 is
It is output to the motion adaptive addition unit 8. Output M of MV detector 4
V is output to the reinforcement signal generation unit 5. The output RS of the reinforcement signal generation unit 5 is output to the reinforcement signal addition unit 6. The output Sr of the reinforcement signal adder 6 is output to the motion adaptive adder 8. The output MD of the motion detector 7 is output to the motion adaptive adder 8. The output Sa of the motion adaptive addition unit 8 is output to the double speed processing unit 9.

The first 1-field delay unit 11 and the second 1-field delay unit
Field delay unit 12, third one-field delay unit 13
Delays each input signal by one field, and the first field delay unit 11 outputs the current field video signal S1 and the second one field delay unit 12 outputs the previous field. The video signal S2 is the third 1
The field video signal S3 is output to the output of the field delay unit 13 two before.

The moving picture interpolating section 2 generates a moving picture interpolating signal Sm, which is an inter-field interpolating signal using peripheral image signals in the same field, from the interlaced scanning signal S1 of the current field.

On the other hand, the still picture interpolating section 3 generates a still picture interpolating signal Ss which is an inter-field interpolating signal from the interlaced scanning signal S2 of the previous field.

The MV detector 4 compares the current field video signal S1 and the field video signal S3 before two, which are divided into blocks each having m pixels in the vertical direction and n pixels in the horizontal direction (m and n are natural numbers), and each block is compared. The direction and size of the moving image are detected as the motion vector MV. As a method for detecting the motion vector MV, for example, a block matching method is known. Current field image signal S1 divided into blocks
With respect to the predetermined block (referred to as block A), the area having the highest degree of matching is searched from the field image S3 two years before. The distance and direction between the block A and the region with the highest degree of coincidence on the field video signal S3 two years ago are the motion vector MV between two fields. In addition, it is also possible to detect the motion vector by using a gradient method or the like.

The reinforcement signal generator 5 generates the reinforcement signal RS using the motion vector MV obtained by the MV detector 4. Here, the motion vector MV output by the MV detection unit 4 is a motion vector between two fields. The reinforcement signal generation unit 5 multiplies the motion vector MV by 1/2 to form a motion vector for one field (hereinafter also referred to as a compensation vector), and the previous field image signal S2 in the area indicated by this compensation vector.
The reinforcement signal RS is generated by performing a high-pass filter process in which a tap exists in the vertical direction.

The generation of the reinforcement signal RS will be described with reference to FIG. In FIG. 2, each field pixel is labeled with a three-digit code starting with P. P is a pixel, 100 is a field, 10 is a scan line, and 1 is a digit. Each pixel position is represented. Figure 2
In the above, the generation of the reinforcement signal RS is exemplified by the case where the MV detection unit 4 detects the motion vector MV which is jumped upward between two fields by two scanning lines and moved by two pixels to the right by two scanning lines. In this case, the compensation vector is one scan line up and one to the right.
Pixels move. The center position corresponding to the interpolation pixel is the pixel P242. A vertical high-pass filter is formed with the pixel P242 at the center, and a reinforcement signal is generated. As an example of the coefficients of the vertical high-pass filter in the present embodiment, coefficients -1, 2, and -1 are used in order from the top. In this case, the reinforcement signal RS = -P222 of the interpolation pixel P123.
It is represented by + 2P242-P262.

The reinforcement signal adder 6 includes the moving picture interpolation signal Sm generated by the moving picture interpolation signal generator 2 and the reinforcement signal generator 5.
The addition is performed with the reinforcement signal RS generated in.

The motion detecting section 7 generates a difference signal between the input video signal Si and the previous field video signal S2, processes the absolute value of the difference, and generates a motion amount MD.

The motion adaptive addition unit 8 uses the motion amount MD detected by the motion detection unit 7 as a reference and uses the moving image interpolation signal Sr and the still image interpolation signal Ss reinforced by the reinforcement signal addition unit 6. The interpolation signal Sa (Sa = aSs + bSr) is generated. That is, the moving image interpolation signal Sr and the still image interpolation signal Ss reinforced by the reinforcement signal adding unit 6 are converted into the motion amount MD.
Is large, the ratio of the coefficient b is increased to increase the ratio of the reinforced moving image interpolation signal Sr. Conversely, when the motion amount MD is small, the ratio of the coefficient a is increased to increase the ratio of the still image interpolation signal Ss. The mixing ratio is changed so as to output the interpolation signal Sa.

The double-speed processing unit 9 receives the current field scanning line signal S1 and the interpolation image signal Sa generated by the motion adaptive addition unit 8.
And ½ compression processing and time-sequential rearrangement processing on the time axis, respectively, and the progressive scan image signal So is output.

According to the present invention, the moving image interpolation signal Sm generated from the current field image signal S1 by using the low pass filter is subjected to the vertical high pass filter processing on the image signal in the area obtained from the motion vector MV. The vertical frequency characteristic is improved by adding the generated reinforcement signal RS.

Ideally, the MV detection unit 4 detects an appropriate motion vector corresponding to the actual motion of the object, but depending on the contents of the video signal, an inappropriate motion vector different from the actual motion vector may be detected. May be detected. In the present invention, even when the motion vector is inappropriate, since the processing is performed based on the moving image interpolation signal Sm, compared to the conventional motion-compensated scan conversion in which the video signal of the previous field is used as it is for interpolation. It is possible to suppress the influence of image deterioration.

In the present embodiment, the video signals of the current field video signal S1 and the field video signal S3 before two fields separated by 2 fields are used. The motion vector MV may be detected between them. When the MV detection unit 4 searches between N fields (N is a natural number), the motion between N fields is the motion vector MV.
Is output as. The reinforcement signal generation unit 5 reinforces the interpolation signal of the current field by subjecting the video signal of the area on the adjacent field, which is shown by multiplying the motion vector MV by 1 / N, to the high-pass filter processing in which there is a tap in the vertical direction. Generate a signal.

Next, the structure of the main scanning conversion apparatus according to the second embodiment of the present invention will be described with reference to FIG. The scanning conversion device 1B according to the present embodiment includes a moving image interpolation unit 2
A still image interpolation section 3, a motion vector detection section (MV detection section) 4, a reinforcement signal generation section 5, and a reinforcement signal addition section 6
A motion detection unit 7, a motion adaptive addition unit 8, a double speed processing unit 9, a gain adjustment unit 10, and a first one-field delay unit 1.
1st, 2nd 1 field delay part 12, 3rd 1 field delay part 13, and 4th 1 field delay part 12a
And a fifth 1-field delay unit 13a.

The interlaced scanning type video input signal Si is input to the motion detection section 7 and the first one-field delay section 11, and the double speed processing section 9 outputs the progressive scanning type video output signal So.
Is output.

Output S1 of the first one-field delay unit 11
The second 1-field delay unit 12 and the moving image interpolation unit 2
Is output to the MV detection unit 4 and the double speed processing unit 9. Second
The output S2 of the 1-field delay unit 12 is output to the third 1-field delay unit 13, the still image interpolation unit 3, the reinforcement signal generation unit 5, and the motion detection unit 7. The output S3 of the third one-field delay unit 13 is output to the MV detection unit 4.

The output Sm of the moving picture interpolating section 2 and the output Ss of the still picture interpolating section 3 are outputted to the motion adaptive adding section 8. The output MV of the MV detector 4 is output to the reinforcement signal generator 5. The output RS of the reinforcement signal generation unit 5 is the gain adjustment unit 1
Output to 0. The output Sr of the reinforcement signal addition unit 6 is output to the double speed processing unit 9. The output MD of the motion detector 7 is output to the motion adaptive adder 8 and the gain adjuster 10. The output Sa of the motion adaptive addition unit 8 is output to the fourth 1-field delay unit 12a, the MV detection unit 4, and the reinforcement signal addition unit 6. The output AS of the gain adjustment unit 10 is the reinforcement signal addition unit 6
Is output to. The output Sa2 of the fourth 1-field delay unit 12a is output to the fifth 1-field delay unit 13a. The output Sa3 of the fifth 1-field delay unit 13a is
It is output to the MV detector 4.

The third one-field delay unit 13, the fourth one
Field delay unit 12a, fifth 1-field delay unit 1
3a is performing 1-field delay processing, and the fourth 1
The output of the field delay unit 12a is an interpolation signal one field before the current field video signal, and the output of the fifth 1 field delay unit 13a is an interpolation signal two fields before the current field video signal.

The MV search unit 4 detects the current field video signal S
1 and the interpolated signal Sa by the motion adaptive processing, the pre-previous field video signal S3 and the pre-previous interpolated signal Sa3 are input,
A current frame video signal composed of the current field video signal S1 and the interpolation signal Sa by the motion adaptive processing and a pre-previous frame video signal composed of the pre-preceding field video signal S3 and the pre-preceding interpolation signal Sa3 are configured to form a current frame video signal. The motion vector is searched from the frame video signal two frames before.

The reinforcement signal RS generated by the reinforcement signal generation unit 5 has its gain adjusted by the gain adjustment unit 10 according to the motion amount MD, and is added to the interpolation signal Sa by the reinforcement signal addition unit 6. .

In the first embodiment, the interlaced scanning signals S1 and S3 are used as the video signal for detecting the motion vector, but in the present embodiment, the interlaced scanning signal S is used.
1 and interpolation signal Sa by motion adaptation, interlaced scanning signal S
3 and a motion adaptive interpolation signal Sa3 are used as a frame image to perform a highly accurate search.

The gain adjusting unit 10 adjusts the gain according to the motion amount MD detected by the motion detecting unit 7 so that the gain becomes large when MD is large. This is because the interpolation signal Ss generated by the still image interpolation unit 3 originally has high vertical resolution, and it is not necessary to add the reinforcement signal.

Further, in the present embodiment, the adaptive signal of the intra-field interpolation signal Sm and the inter-field interpolation Ss is used as the interpolation signal Sa, but a vertical / time two-dimensional interpolation filter and a vertical pixel including horizontal pixels are also used. Even if adaptive processing using a horizontal / temporal three-dimensional interpolation filter or the like is performed, there is no effect on the effect of this embodiment.

When pixels are interpolated only by the signal from the moving picture interpolating unit as in the conventional art, high frequency components are attenuated and the vertical resolution is deteriorated, whereas the present invention is
For example, a moving image interpolation unit 2 including a low-pass filter
By adding a high frequency component from the reinforcement signal generation unit 5 configured as, for example, a vertical high-pass filter, the frequency characteristic of the interpolated pixel is improved and the vertical resolution can be improved.

As described above, according to the present invention, when an appropriate motion vector is detected during main scanning conversion, high-quality scanning conversion equivalent to normal motion compensation scanning conversion is performed,
Provided are a main scanning conversion device and a main scanning conversion method for performing high resolution and high image quality main scanning conversion in which deterioration of image quality is suppressed even when an inappropriate motion vector different from the motion of an object in an image is detected. it can.

Further, it is possible to provide a main scanning conversion device and a main scanning conversion method for performing natural scanning conversion from a still image to a moving image by combining with motion adaptive processing.

The configuration of an image signal display device using the main scanning conversion device according to the present invention will be described with reference to FIG.

An image signal display device 20, such as a television receiver or an image display device, includes an input signal processing device 21, an analog-digital converter 22, and a main scanning conversion device 1.
And a digital-analog converter 23 and a display unit 24.

The input signal processing section 21 receives an input signal from a DVD, a VTR or the like or an input signal from a television tuner and outputs an image signal.

When the signal from the input signal processing section 21 is an analog signal, the analog-digital converter 22 converts it into a digital signal and outputs it.

The main scanning conversion device 1 is a main scanning conversion device according to the present invention. When the input main scanning image signal is a digital signal, it is composed of a digital circuit,
The interlaced scanning image signal is sequentially converted into a scanning image signal.

The digital-analog converter 23 converts the digital signal output from the main scanning converter 1 into an analog signal and outputs it.

The display unit 24 includes a CRT, LCD, PDP,
A display means such as a DMD is provided, and an image is displayed using an image signal that has undergone main scanning conversion.

In such an image signal display device,
The input image signal of the interlace system can be displayed on the display unit as the image signal of the progressive scanning system,
If an appropriate motion vector is detected during main scan conversion, scan conversion with high image quality equivalent to normal motion compensation scan conversion is performed, and an inappropriate motion vector different from the motion of the object in the image is detected. Even in such a case, it is possible to provide an image signal display device capable of displaying a good image by performing main scanning conversion with high resolution and high image quality in which deterioration of image quality is suppressed. further,
By combining with the motion adaptive processing, it is possible to provide an image signal display device which performs natural scan conversion from a still image to a moving image.

The image signal display device 20 to which the main scan conversion device 1 according to the present invention is applied includes a television receiver, a progressive scan output DVD player, a PC TV expansion board, and the like. Further, as the display unit 24, CRT, L
A display device such as a CD or DMD can be used.

Further, the present invention provides an interlaced scanning signal having various scanning lines, for example, NTSC, PA of the current television system.
It is also apparent that the present invention can be applied to the case of converting L, 1080i of HDTV, etc. into progressive scanning signals.

[0056]

According to the present invention, when an appropriate motion vector is detected, the same high image quality as that of the normal motion compensation scan conversion is maintained, and an inappropriate motion vector different from the actual motion is searched. In this case, a motion-compensated interlaced scanning-sequential scanning conversion with a natural feeling is provided from a still image in which image deterioration is suppressed to a moving image, and a remarkable effect can be obtained in high resolution and high image quality of an image.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a configuration of a main scanning conversion device according to a first embodiment of the invention.

FIG. 2 is a diagram for explaining an outline of operations of strong signal generation processing and reinforcement signal addition processing of the present invention.

FIG. 3 is a block diagram illustrating a configuration of a main scanning conversion device according to a second embodiment of the present invention.

FIG. 4 is a block diagram illustrating a configuration of an image signal display device using a main scanning conversion device according to the present invention.

[Explanation of symbols]

1, 1A Main scanning converter 2 Video interpolation section 3 Still image interpolator 4 MV detector 5 Reinforcement signal generator 6 Reinforcement signal addition section 7 Motion detector 8 Motion adaptive adder 9x speed processor 10 Gain adjuster 11-13, 12a, 13a 1-field delay unit 20 Image signal display device 21 Input signal processor 22 Analog-to-digital converter 23 Digital-Analog Converter 24 Display P pixels

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuo Nakajima             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department (72) Inventor Yasutaka Tsuru             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department (72) Inventor Masahiro Ogino             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department (72) Inventor Kazuto Ishikura             5-20-1 Kamimizuhonmachi, Kodaira-shi, Tokyo Stock             Ceremony Hitachi System LSI Development Center             Within (72) Inventor Masaaki Matsukawa             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony company Hitachi Image Information System (72) Inventor Wataru Kato             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony company Hitachi Image Information System (72) Inventor Takaaki Matono             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony company Hitachi Eitech Tech F-term (reference) 5C063 AA01 AA06 BA04 BA09 BA10                       BA12 CA01 CA05 CA07

Claims (5)

[Claims] 1. A main scanning conversion device for converting an interlaced scanning image signal into a progressive scanning image signal, a still image interpolating unit for generating an inter-field interpolation signal from the interlaced scanning image signal, and an inter-field interpolation from the interlaced scanning image signal. A moving image interpolation unit that generates a signal; a motion vector detection unit that detects and outputs a motion vector for each block unit of m × n pixels (m and n are natural numbers) from two or more images separated by one field or more; A reinforcement signal generation unit that generates a reinforcement signal by performing vertical high-pass filter processing on an interlaced scan image signal of a region obtained from a motion vector output from the motion vector detection unit, and the reinforcement generated by the reinforcement signal generation unit. Reinforcement signal adder that adds a signal to the inter-field interpolation signal to generate a reinforcement intra-field interpolation signal, and interlaced scanning A motion detection unit that detects a motion amount of an image and outputs the motion amount, and an intra-field interpolation signal and an inter-field interpolation signal that are reinforced by the reinforcement signal addition unit according to the motion amount output from the motion detection unit. A motion adaptive addition unit that generates a motion adaptive interpolation signal by switching the addition ratio of
A main scanning conversion device comprising: a double speed processing unit for generating a progressive scanning image signal by performing time-axis compression and time-sequential rearrangement of an interlaced scanning image signal and the motion adaptive interpolation signal. 2. A main scanning conversion device for converting an interlaced scanning image signal into a progressive scanning image signal, a still image interpolating unit for generating an inter-field interpolation signal from the interlaced scanning image signal, and an inter-field interpolation signal from the interlaced scanning image signal. An interpolating unit for generating a moving image, a motion detecting unit for detecting a motion of an interlaced scanning image signal and outputting a motion amount, and the inter-field interpolating signal and the intra-field signal according to the motion amount output from the motion detecting unit. A motion adaptive adder that generates a motion adaptive interpolation signal by switching the addition ratio with the interpolation signal, and moves in block units of m × n pixels (m and n are natural numbers) from two or more images separated by one field or more. A motion vector detection unit that detects a vector and outputs a motion vector, and a region jump calculated from the motion vector output from the motion vector detection unit. And a reinforcement signal generation unit for generating a reinforcement signal by performing vertical high-pass filtering on the scanned image signal, and a gain control for generating a gain-controlled reinforcement signal by controlling the gain of the reinforcement signal according to the amount of movement of the image. Unit, a reinforcement signal addition unit for adding the gain-controlled reinforcement signal to the motion adaptive interpolation signal to generate a reinforcement motion adaptive interpolation signal, an interlaced scanning image signal and a time of the reinforcement motion adaptive interpolation signal A main scanning conversion apparatus comprising: a double speed processing unit that performs axial compression and time series rearrangement to generate a progressive scanning image signal. 3. An image signal display device, comprising the main scanning conversion device according to claim 1 or 2. 4. A main scanning conversion method for converting an interlaced scanning image signal into a progressive scanning image signal, wherein an interfield interpolation signal is generated from the interlaced scanning image signal and an intrafield interpolation signal is generated from the interlaced scanning signal. A motion vector is generated by detecting a motion vector for each block unit of m × n pixels (m and n are natural numbers) from two or more images separated from each other, and an interlaced scanning image signal of a region obtained from the motion vector is generated. A vertical high-pass filter process is performed to generate a reinforcement signal, the reinforcement signal is added to the intra-field interpolation signal to generate a reinforcement intra-field interpolation signal, and the motion amount of the interlaced scanning image is detected to calculate the motion amount. The motion adaptive interpolation signal is output by switching the addition ratio of the inter-field interpolation signal and the inter-field interpolation signal according to the motion amount. Generated, the main scan conversion method characterized by generating an image signal of the time base compression and the time series rearrangement was carried out sequential scanning interlaced image signal and the motion adaptive interpolation signal. 5. A main scanning conversion method for converting an interlaced scanning image signal into a progressive scanning image signal, wherein an inter-field interpolation signal is generated from the interlaced scanning image signal, an intra-field interpolation signal is generated from the interlaced scanning signal, and interlaced scanning is performed. The motion of the image signal is detected, the motion amount is output, the addition ratio of the inter-field interpolation signal and the intra-field interpolation signal is switched according to the motion amount to generate the motion adaptive interpolation signal, and the motion adaptive interpolation signal is separated by one field or more. Mxn from two or more images
Generate a reinforcement signal by detecting a motion vector for each block unit of pixels (m and n are natural numbers), outputting the motion vector, and performing vertical high-pass filter processing on the interlaced scan image signal of the region obtained from the motion vector. Then, the gain of the enhancement signal is controlled according to the amount of motion of the image to generate a gain-controlled enhancement signal, and the gain-controlled enhancement signal is added to the motion adaptive interpolation signal to enhance the motion adaptation. A main scanning conversion method, wherein an interpolating signal is generated, an interlaced scanning image signal and the reinforced motion adaptive interpolation signal are time-axis compressed and time-sequentially rearranged to generate a progressive scanning image signal.