JPH07274040A - Device and method for interpolating scanning line for television signal - Google Patents

Abstract

PURPOSE:To reproduce horizontal high-band components for which multiplex signals for reinforcement are not transmitted by an interpolation processing with less picture quality degradation on a decoder side. CONSTITUTION:Input Y signals are outputted as direct system signals after vertical reinforcing signals (VT signals) are subtracted in an adder 350. Also, the Y signals are separated into a low-band component and a high-band component and the VT signals are filtered by memories 410 and 420, the adders 450 and 480 and coefficient units 460 and 470 and inputted to the adder 520. The low-band component is filtering-processed and inputted to the adder 520 and generation is performed as first interpolation signals in the adder 520. The output of the adder 520 is inputted to the adder 530. The high-band component is field-delayed (at the time of still pictures) or vertically interpolated (at the time of moving pictures) and inputted to the adder 530 and the generation is performed as second interpolation signals (interpolation system signals) in the adder 530. The signals of a direct system and an interpolation system are successively converted into scanning signals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scanning line interpolation apparatus and method for television signals.

[0002]

2. Description of the Related Art Although the aspect ratio of a television screen is 1: 3 in the current television broadcasting, high definition television (HDTV) as a new standard is used not only in Japan but also in other countries. An aspect ratio of 16: 9 is adopted. It is known that when viewing a horizontally long screen at a large viewing angle, the sense of presence is significantly improved. However, HD
Since the system itself is a new standard for TV, current receivers cannot receive it as it is. Therefore, the letterbox method is known as a means for easily transmitting a landscape image while maintaining compatibility with the current method.

This system is based on the existing NTS as shown in FIG.
Effective scanning line 480 [book / frame] defined by C method
With the aspect ratio of 4: 3, the center part of the screen 360 [book /
Frame] is a method of transmitting a horizontally long screen image having an aspect ratio of 16: 9. In this case, the original NT
Since only image information using only 3/4 of the effective scanning lines defined by SC can be transmitted, the vertical resolution must be degraded to 3/4. On the other hand, in the television signal of the letterbox system, there are 60 [lines / frames] in the upper and lower portions of the screen, which are non-image areas. Therefore, a method has been proposed in which the upper and lower non-image portions are used to multiplex-transmit an additional signal for compensating for the deterioration of the image on the main screen portion.

Next, as a letterbox system, a system for transmitting the difference between lines in the upper and lower non-image portions (hereinafter referred to as L
Method D) will be described below. The LD method multiplexes a difference signal between a scanning line removed when a sequential scanning signal is converted into an interlaced scanning signal and an interpolation signal generated from the interlaced scanning signal in the upper and lower non-image parts, and at the receiver side, In this method, the original scanning line signal removed on the sending side is generated by using the difference signal and the interpolation signal, and the original progressive scanning signal is reproduced.

FIG. 7 shows an embodiment of an LD type encoder. 525 scanning lines, frame frequency 60
(Hz) and R, G, B signals which are progressive scanning signals having an aspect ratio of 16: 9 are input terminals 101, 102, respectively.
It is input to the matrix circuit 104 via 103.
The matrix circuit 104 performs a matrix operation on the R, G and B signals to generate a luminance signal (hereinafter referred to as Y signal) and two color difference signals (referred to as I and Q signals).

The Y signal is a vertical reduction pass filter (VL
In the PF) 105, band limitation is performed in the vertical direction so that aliasing does not occur when converting from 480 effective scanning lines to 360 effective lines in the letterbox format. The output of the vertical reduction pass filter (V-LPF) 105 is input to the 4 → 3 converter 106 for converting the number of scanning lines and converted from 480 effective scanning lines to 360. The output of the 4 → 3 converter 106 is input to a vertical reduction pass filter (V-LPF) 107 and a vertical high pass filter (V-HPF) 108.

The output of the vertical reduction pass filter 107 is input to the interlaced scanning converter 109 and becomes the main screen portion signal of the encoded output. In addition, the vertical high-pass filter 108
Is output to the interlaced scanning converter 110 and converted into an interlaced scanning signal. The interlaced scanning signal is further band-limited by the horizontal low-pass filter (H-LPF) 111 so that the band after time compression does not exceed the transmission band of the current broadcast. The output of the horizontal reduction pass filter 111 is input to the time compression circuit 112 and time-compressed to 1/3. The output of the time compression circuit 112 is input to the buffer memory 114. When the signal of the buffer memory 114 is output, three of the 360 time-compressed signals are arranged on one scanning line to be transmitted, and are allocated to 120 scanning lines in the upper and lower non-image areas. Is output.

On the other hand, the I and Q signals are input to vertical low pass filters (V-LPF) 117 and 118, respectively,
The band is limited so as not to be folded back in the vertical direction when performing the interlaced scanning conversion and the 4 → 3 conversion. The outputs of the vertical low-pass filters 117 and 118 are input to the interlaced scanning converters 119 and 120, respectively, converted into interlaced scanning signals, and then input to the 4 → 3 converters 121 and 122, where the fields are converted. The number of effective scan lines is 36
Converted to 0 interlaced scanning signals. 4 to 3 converter 12
The outputs of 1 and 122 are horizontal low-pass filters (H-LP
F) 123 and 124 are band-limited to the band of the current broadcast format, and then input to multipliers 125 and 126, respectively, and modulated with a carrier frequency fsc (155 / 2fh: fh is a horizontal scanning frequency). Multipliers 125 and 126
The output of is the color signal C that is added by the adder 127 and is multiplexed with the main screen signal.

Output of interlaced scan converter 109 and adder 1
The 27 outputs are input to the buffer memories 113 and 128, respectively, and subjected to delay adjustment. Buffer memory 11
The outputs of 3 and 128 are input to the adder 115 and output as a composite signal of the main screen section. Adder 115
Output (main screen portion signal) and buffer memory 114 output (upper and lower non-image portion signals) are selectively derived by the selector 116 at the timing of the main screen portion and upper and lower non-image portion, and the scanning line number 525
It is output as an interlaced scanning signal of a book. This encoder output is a letterbox format signal.

Also, separated from the preceding sequential scanning signal,
The horizontal synchronizing signal H and the vertical synchronizing signal V are supplied to the control signal generator 1
The control signal a, b, c and the select signal d to the sine wave, the cosine wave, and the buffer memories 113, 114, and 128 which are input to 29 and have the carrier frequency fsc are generated.

FIG. 8 shows the structure of the decoder. The encode signal described above is input to the Y / C separation circuit 201 that separates the luminance signal and the color signal via the input terminal 200, and is separated into the luminance signal Y and the color signal C. The separated Y signal is delay-adjusted by the buffer memory 202 and then input to the progressive scan converter 203. The progressive scan converter 203 converts the interlaced scan signal into a progressive scan signal. The output of the progressive scan converter 203 is input to a vertical low-pass filter (V-LPF) 204, and its vertical low-pass component is extracted.

The input encode signal is also input to the buffer memory 205. In the buffer memory 205,
The multiplex signals multiplexed in the upper and lower non-image parts are rearranged into the interlaced scanning signals having the frame frequency of 30 (Hz). The output of the buffer memory 205 is input to the time expansion circuit 206, time-expanded three times and reproduced as the original compensation signal. The output of the time extension circuit 206 is the progressive scan converter 20.
After being inputted to the No. 7 and sequentially converted into the scanning signal, the vertical high-pass filter (V-HPF) 208 reproduces the vertical high-pass component. Here, the outputs of the vertical low-pass filter 204 and the vertical high-pass filter 208 are combined by the adder 209 and reproduced as a broadband signal having 360 effective scanning lines. The output of the adder 209 is 3 for converting the number of scanning lines.
→ 4 The number of effective scanning lines input to the converter 211 is 480
It is reproduced into a progressive scanning signal of a book.

On the other hand, the color signal obtained from the Y / C separation unit 201 is input to the multipliers 212 and 213, multiplied by the sine wave and the cosine wave of the carrier frequency fsc, and demodulated as I and Q signals, respectively. To be done.

Next, the I and Q signals output from the multipliers 212 and 213 are respectively fed to the horizontal low pass filter 21.
4, 215, and the harmonics of each component are removed.
The outputs of the horizontal low-pass filters 214 and 215 are input to the 3 → 4 converters 216 and 217, respectively, and converted into signals of 180 effective scanning lines. 3 → 4 converter 216,
The outputs of 217 are progressive scan converters 218 and 21 respectively.
9 and is converted into a progressive scanning signal having a frame frequency of 60 (Hz). The I and Q signals output from the progressive scan converters 218 and 219 are respectively stored in the buffer memory 22.
0, 221, and is output after delay adjustment for time matching with the Y signal from the 3 → 4 converter 211.
The Y, I, and Q signals are input to the matrix circuit 222, converted into R, G, and B component signals and output.

Here, the sync reproducing circuit 224 reproduces the horizontal and vertical synchronizing signals H and V from the input encode signal,
It also creates a two-frame reference signal. The fsc reproducing unit 225 generates a sine wave and a cosine wave of the previous carrier frequency fsc based on the input encode signal and the 2-frame reference synchronization signal. The control signal generation unit 226 creates the memory control signals e, f, g, h using the horizontal and vertical synchronization signals, and the buffer memories 202, 205, 220, 2
21 is controlled.

As described above, although the original progressive scanning signal can be reproduced by the decoder unit based on the multiplex signal, the signal band of the multiplex signal added to the upper and lower non-image parts is limited in terms of transmission and thus horizontal. The band in the direction is narrower than the luminance signal transmitted in the main image section. Therefore, the decoder unit reproduces the original progressive scanning signal for the horizontal low-frequency component, but does not reproduce the horizontal high-frequency component, which causes a problem of image quality deterioration.

[0017]

As described above, when the progressive scanning signal is reproduced based on the multiplex signal transmitted in the upper and lower non-image parts, the image quality deterioration of the horizontal high frequency component which is not transmitted by the multiplex signal occurs. . In addition, when the multiplex signal is restored and scanning line interpolation is performed, there is a problem that the overall image quality deteriorates due to S / N deterioration of the multiplex signal in a weak electric field.

Therefore, it is an object of the present invention to provide a television scanning line interpolation processing device capable of reproducing a horizontal high frequency component, in which a multiplex signal for reinforcement is not transmitted, by an interpolation process with little deterioration of image quality on the decoder side. .

[0019]

A horizontal high frequency component is created by vertically interpolating a main picture portion signal. Further, the scanning line interpolation circuit for the horizontal low-frequency component multiplexed signal and the main image portion signal and the horizontal high-frequency component interpolation signal generation circuit are shared to perform the interpolation. When a still image is used, the interpolated signal output with little S / N deterioration is used to set the signal one field before as the other interpolated signal.

[0020]

By the above means, it is possible to improve the horizontal high frequency component in which the image quality is deteriorated and to realize the increase of the hardware scale to the minimum by sharing the hardware configuration with the scanning line interpolation circuit of the horizontal low frequency component. it can. In addition, the deterioration of the overall image quality is improved by using the reproduced interpolation signal of one field before in the still image as an interpolation signal.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. According to the present invention, in order to reduce the hardware scale, the sequential scanning line conversion processing is not upsampled as shown in the conventional example and then the interpolation is performed, and the interlaced scanning signal is directly divided into the direct system and the interpolation system. It is configured to perform processing.

(First Embodiment) FIG. 1 shows a decoder according to the first embodiment of the present invention. The 360 effective scanning lines and the interlaced scanning Y signal transmitted in the letter block format are supplied to the input terminal 1000, and the horizontal low-pass filter 3
10. The horizontal high-pass filter 320 separates horizontal low-pass components and high-pass components.

On the other hand, the VT signal transmitted in the upper and lower non-picture portions is supplied to the input terminal 2000, and the 1-line memory 41
It is input to the 1-line memory 420 via 0. The VT signal of the input terminal 2000 and the output of the 1-line memory 410 are added by the adder 430. The output of the adder 430 is −
It is multiplied by -1/2 by the 1/2 multiplier 440 and output.
The output of the coefficient unit 440 is added to the input Y signal by the adder 350, the component added to the interlaced scanning signal is removed, and the result is output to the output terminal 3000 as the output signal of the direct system. A part of the VT signal is added to the interlaced scanning signal when only the input Y signal is reproduced on the current receiver.
This is to improve the resolution. In order to return to high image quality, it is necessary to remove such an additional signal once, so the adder 350 adds the outputs of the coefficient unit 440.

The output of the horizontal low-pass filter 310 is input to the 1-line memory 490. 1 line memory 490
And the output of the horizontal low-pass filter 310 are added by the adder 500, and the output of the adder 500 is multiplied by ½ by the ½ multiplication coefficient unit 510 and input to the adder 520.

The output of the 1-line memory 420 and the input VT signal are added by the adder 450, and the adder 45
The output of 0 is multiplied by −1/4 by the −1/4 multiplier 460 and then input to the adder 480.

The output of the 1-line memory 410 is the coefficient unit 4
After being input to 70 and multiplied by 3/2, it is input to the adder 480 and added to the output of the −¼ multiplier 460. The output of the adder 480 is input to the adder 520 and becomes 1/2
It is added to the output of the double coefficient unit 510. The output of the adder 520 is input to the adder 530.

The output of the horizontal high-pass filter 320 is the vertical interpolation circuit (VIPF) 360 and the frame memory (F
M) is input to 370. The interpolation output of the vertical interpolation filter 360 and the output of the frame memory 370 are mixed by the mixing circuit 4
00 and mixed according to the motion of the image, and the mixed output is input to the adder 530. Previous mixing circuit 40
At 0, the output of the frame memory 370 is selectively derived for a still image, and the output of the vertical interpolation circuit 360 is selectively derived for a moving image. The output of the adder 530 is led to the output terminal 4000 as the output of the interpolation system.

As described above, in this system, the horizontal high-frequency components of the interpolation system are field-delayed (still image mode) of the horizontal high-frequency components of the direct system and vertically interpolated (moving image mode). And are extracted and used according to the movement of the image. Therefore, the image quality deterioration of the horizontal high frequency component is eliminated.

(Second Embodiment) FIG. 2 shows a second embodiment of the present invention.
The example of is shown. In the first embodiment, a vertical interpolation circuit is required as a compensation output for the horizontal high frequency component of the interpolation system. A line memory is required for this purpose. However, in the second embodiment, the vertical low-frequency component interpolation circuit is effectively utilized to realize the vertical interpolation.

That is, a part different from the circuit of FIG. 1 will be described. First, the output of the frame memory 370 is the coefficient unit 380.
It is input to the adder 530 via (controlled so that the coefficient becomes 1 in the still image mode). Horizontal high pass filter 3
The output of 20 is input to the adder 550 via the coefficient unit 540 (controlled to have a coefficient of 1 in the moving image mode), and is added to the output of the horizontal low-pass filter 310.
The output of the adder 550 is input to the line memory 490 and the adder 500 that form the one-line sum circuit 7000. The output of the 1-line memory 490 is also input to the adder 500. The output of the adder 500 is multiplied by ½ by the ½ multiplication coefficient unit 510 and input to the adder 520.

According to the above configuration, the interline sum circuit 70
00 is realized simultaneously for the interpolation of the horizontal low-frequency component and the interpolation of the horizontal high-frequency component (in the moving image mode), and the hardware (line memory) can be reduced as compared with the embodiment of FIG. .

Further, the present invention can be realized without executing such a motion adaptive operation. That is, it is possible to obtain a sufficient image quality even with the interpolation system output of only the moving image system. In that case, the coefficient of the coefficient unit 540 is 1, so the output of the adder 550 is the input luminance signal itself. Therefore, the luminance signal itself may be input to the 1-line sum circuit 7000 (configuration of FIG. 3).

(Third Embodiment) FIG. 3 shows a third embodiment of the present invention. According to this embodiment, S in a weak electric field
/ N deterioration can be improved. The multiplex signal is transmitted in the lower non-picture section, but the current receiver recognizes the multiplex signal as an interference, so a method of reducing energy is used. On the contrary, such a measure for reducing interference has a problem that the S / N ratio of the reproduced multiplexed signal is deteriorated when the electric field is weak. In addition, especially SSKF (Symmetric Short Ker)
In the case of the (nel filter), the noise spectrum is different because the multiplex signal is different in the interpolating process between the direct system and the interpolating system. By utilizing this point, the S / N difference in the visual sense can be improved by delaying the direct system output reproduced for a still image by one field to obtain the interpolation system output.

In FIG. 3, the reproduced direct system output is delayed by the field delay circuit 370 and is input and output to the mixing circuit 610 together with the output of the adder 520 which is the interpolation system during moving image. Then, by selectively deriving the output of the field delay circuit 370 for a still image and selectively deriving the output of the adder 520 for a moving image, the S / N in the inter-interpolation system during a still image.
It is improving that the difference becomes large. Further, by using this method, there is an advantage that the synthesis characteristics of the horizontal low frequency component and the high frequency component are the same in the direct system and the reproducing system.

The embodiment shown in FIG. 4 is a modification of the embodiment shown in FIG. 3 and shows a structure for further improving the S / N ratio. In this embodiment, the output of the field delay circuit 370 and the output of the adder 520 which is an interpolation system output at the time of moving image are added to the adder 630.
By 1 and multiplying by 1/2 in the coefficient unit 640
(2) S / N improvement effect of ^1/2 is obtained.

The embodiment of FIG. 5 shows an embodiment for improving the S / N deterioration in the case of up-sampling and then sequentially converting. The input Y signal from the input terminal 1000 is sequentially converted into a scanning signal by the upsampling circuit 2120. Similarly,
The VT signal at the input terminal 2000 is sequentially converted into a scanning signal by the upsampling circuit 2130. The output of the upsampling circuit 2120 is a vertical low pass filter (VL
PF) 2140, and the upsampling circuit 2130 output is a vertical high-pass filter (V-HPF).
The band is limited at 2150. Vertical low-pass filter 21
40 and the output of the vertical high-pass filter 2150 are added by the adder 21.
The original progressive scanning signal is added at 60 to reproduce the original progressive scanning signal. Adder 2
160 output is input to the field delay circuit 2170,
It is delayed by one field. Field delay circuit 2170
The output and the output of the adder 2160 are input to the selector 2190. The selector 2190 selectively derives the output of the adder 2160 for the direct system line, and selectively derives the output of the field delay circuit 2170 for the interpolation system line. The output of the adder 2160 and the output of the selector 2190 are input to the selector 2180. The selector 2180 selectively derives the output of the selector 2190 for a still image and selectively derives the output of the adder 2160 for a moving image according to the motion of the image.
As a result, S / N can be improved even during upsampling.

[0037]

According to the present invention, the scanning line interpolation can be realized without performing upsampling, which makes the hardware configuration difficult, and the interpolation of the horizontal high frequency component can be realized without increasing the hardware. Further, the S / N deterioration in the weak electric field can be improved.

[Brief description of drawings]

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

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

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a diagram showing a fourth embodiment of the present invention.

FIG. 5 is a diagram showing a fifth embodiment of the present invention.

FIG. 6 is an explanatory diagram of a letterbox type screen.

FIG. 7 is a diagram showing a letterbox encoder.

FIG. 8 shows a letterbox decoder.

[Explanation of symbols]

310 ... Horizontal low-pass filter, 320 ... Horizontal high-pass filter, 350 ... Adder, 360 ... Vertical interpolation circuit, 3
70 ... Frame memory (field delay circuit), 400
... Mixing circuit, 410, 420 ... Line memory, 430 ...
Adder, 440 ... Coefficient unit, 450 ... Adder, 460, 4
70 ... Coefficient device, 480, 500 ... Adder, 510 ... Coefficient device, 520, 530 ... Adder.

Claims (10)

[Claims] 1. A horizontal low-frequency component separating means for separating horizontal low-frequency components of an input luminance signal, a horizontal high-frequency component separating means for separating horizontal high-frequency components of the input luminance signal, and the input luminance signal. First interpolation signal generating means for directly generating a system signal from the vertical reinforcement signal and second interpolation for generating an interpolation signal from the horizontal low-frequency component from the horizontal low-frequency component separating means and the vertical reinforcement signal. Signal generation means, vertical interpolation means for vertically interpolating the horizontal high-frequency components from the horizontal high-frequency component separating means, vertical interpolation output from the vertical interpolation means, and interpolation from the second interpolation signal generation means. A first adding means for adding the signal, and means for generating a sequential scanning signal using the direct system signal from the first interpolation signal generating means and the interpolation system signal from the first adding means. Tele characterized by having Scanning line interpolating device of the television signal. 2. A horizontal low-frequency component separating means for separating horizontal low-frequency components of an input luminance signal, a horizontal high-frequency component separating means for separating horizontal high-frequency components of the input luminance signal, and the input luminance signal. First interpolation signal generating means for directly generating a system signal from the vertical reinforcement signal and second interpolation for generating an interpolation signal from the horizontal low-frequency component from the horizontal low-frequency component separating means and the vertical reinforcement signal. Signal generation means, vertical interpolation means for vertically interpolating the horizontal high-frequency components from the horizontal high-frequency component separating means, motion detection means for detecting the motion of the image of the input luminance signal, and the horizontal high-frequency components A first field delay means for delaying the output of the separation means by one field, and an output of the first field delay means and an output of the vertical interpolation means are mixed according to a motion detection signal from the motion detection means. First A television signal, comprising: 1 mixing means; and 2nd adding means for adding the output from the second interpolation signal generating means and the mixing output from the first mixing means. Scan line interpolator. 3. The scanning line interpolation signal generating means is SSKF
(Symmetric ShortKernel Fi
3. The scanning line interpolation device for a television signal according to claim 1, wherein the scanning line interpolation device is a television signal interpolating device. 4. A first and second scanning line interpolating means for interpolating a scanning line from an input luminance signal and a vertical reinforcement signal, and a delaying means for delaying an output of the first scanning line interpolating means for one field period. A motion detection unit that detects an image motion from the input luminance signal, an output of the second scanning line interpolation unit, and an output of the delay unit are mixed according to the motion detection signal from the motion detection unit, and scanning line interpolation is performed. A scanning line interpolating device for a television signal, comprising: mixing means for obtaining an output. 5. The scanning line interpolation device for a television signal according to claim 4, wherein scanning signals are sequentially generated from the output of the first scanning line interpolating means and the output of the mixing means. 6. A horizontal low-pass filter to which an input luminance signal of interlaced scanning is input, a horizontal high-pass filter to which the input luminance signal is input, and an inter-line sum component of the output of the horizontal low-pass filter. Inter-line sum signal generating means, a vertical interpolation means for obtaining a vertical interpolation component from the output of the horizontal high-pass filter, a field delay means for obtaining a field delay output of the output of the horizontal high-pass filter, and the vertical Mixing means for mixing and outputting the outputs of the interpolating means and the field delay means according to the image movement of the input luminance signal; and a vertical resolution being reinforced in order to convert the input luminance signal of the interlaced scanning into a progressive scanning signal. For inputting the vertical reinforcement signal, and a part of the interline sum component of the vertical reinforcement signal is subtracted from the input luminance signal to obtain a direct system signal. Signal, a filtering output of the vertical reinforcement signal, an inter-line component from the inter-line sum signal generating means, and an output from the mixing means to obtain an interpolation system signal. A scanning line interpolation device for a television signal, comprising: a second adding means. 7. A horizontal low-pass filter to which an input luminance signal of interlaced scanning is input, a horizontal high-pass filter to which the input luminance signal is input, and an output of the horizontal high-pass filter are in a moving image mode. A first coefficient unit that is derived at this time, a first addition unit that adds the output of the first coefficient unit and the output of the horizontal low-pass filter, and the line-to-line sum of the outputs of the first addition unit An inter-line sum signal generating means for obtaining a component, a field delay means for obtaining a field delay output of the output of the horizontal high-pass filter, and a vertical resolution for converting the input luminance signal of the interlaced scanning into a progressive scanning signal. An input end to which a vertical reinforcement signal for reinforcement is input; first addition means for obtaining a direct system signal by subtracting a part of the interline sum components of the vertical reinforcement signal from the input luminance signal; It has a second adding means for adding the filtered output of the vertical reinforcement signal, the inter-line component from the inter-line sum signal generating means, and the output from the field delay means to obtain an interpolation system signal. A scanning line interpolation device for a television signal, characterized in that: 8. An input terminal to which an input luminance signal of interlaced scanning is input, an inter-line sum signal generating means for obtaining an inter-line sum component of the input luminance signal, and an input luminance signal of the interlaced scanning into a sequential scanning signal. In the conversion process, an input end to which a vertical reinforcement signal for reinforcing the vertical resolution is input, and a part of the interline sum component of the vertical reinforcement signal is subtracted from the input luminance signal to obtain a direct system signal. First addition means for obtaining, field delay means for obtaining a field delay output of the output of the first addition means, filtering output of the vertical reinforcement signal, and an inter-line component from the inter-line sum signal generation means, A television signal scanning line interpolating device, further comprising: second adding means for adding an output from the field delay means to obtain an interpolation system signal. 9. An input terminal to which an input luminance signal for interlaced scanning is input, an inter-line sum signal generation means for obtaining an inter-line sum component of the input luminance signal, and an input luminance signal for the interlaced scanning into a progressive scanning signal. In the conversion process, an input end to which a vertical reinforcement signal for reinforcing the vertical resolution is input, and a part of the interline sum component of the vertical reinforcement signal is subtracted from the input luminance signal to obtain a direct system signal. A first addition means for obtaining, a field delay means for obtaining a field delay output of the output of the first addition means, a filtering output of the vertical reinforcement signal, and an inter-line component from the inter-line sum signal generation means. First to add
Second adding means for obtaining the interpolation system signal, third adding means for adding the first interpolation system signal and the output from the field delay means, output of the third adding means and the third Mixing means for mixing the first interpolation system signal according to the motion detection signal to obtain a second interpolation system signal, and sequential scanning using the second interpolation system signal from the mixing means and the direct system signal. A scanning line interpolating device for a television signal, comprising: a means for obtaining a signal. 10. A horizontal low-frequency component of an input luminance signal is separated, a horizontal high-frequency component of the input luminance signal is separated, and a direct system signal is generated from the input luminance signal and a vertical reinforcement signal, An interpolation signal is generated from the separated horizontal low frequency component and the vertical reinforcement signal, a vertical interpolation output is obtained by vertically interpolating the horizontal high frequency component, and the vertical interpolation output and the interpolation signal are added, A scanning line interpolation method for a television signal, wherein a second interpolation signal is generated, and a sequential scanning signal is generated using the direct system signal and the second interpolation signal.