JPH05252537A - Multiple signal transmitter-receiver - Google Patents

Abstract

PURPOSE:To hold the nature of a movement by preventing a crosstalk generated between an auxiliary signal for an animation mode and the vertical low-pass components of temporal high pass components. CONSTITUTION:At a transmission side, only the second field of the horizontal high-pass components of temporal low-pass components being an inter frame sum signal is prepared as an interpolation signal by a vertical interpolation filter 106, and added to horizontal low-pass components by an adder 107. The horizontal low-pass components of temporal high-pass components being an interframe difference signal are shifted to the vertical high-pass components by a horizontal frequency shift circuit 109, and the band is limited by a vertical band pass filter 110 so that a guard band can be obtained. Then, the vertical high-pass components are shifted to the horizontal high-pass components by a line sub-sample circuit 111 and a horizontal frequency shift circuit 112, and multiplexed on the previous interpolation signal of the second field as the auxiliary signal. On the other hand, at a reception side, a demodulation is operated in an opposite process to that at the transmission side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television signal scanning line conversion device in which a transmitting side converts a progressive scanning signal into an interlaced scanning signal for transmission and a receiving side converts the interlaced scanning signal into a progressive scanning signal. The present invention relates to a multiplex signal transmission and reception device which is effective for such purposes.

[0002]

2. Description of the Related Art In order to improve the image quality of terrestrial broadcasting,
First generation EDTV (ExtendedDefiniti)
on TV) broadcasting was started in 1989, and the vertical resolution is being improved by progressive scanning conversion. This is for converting a signal transmitted by interlaced scanning into a progressive scanning signal on the receiving side, and a very good image can be obtained in the still image area.

However, in the moving image area, when an attempt is made to improve the vertical resolution, aliasing distortion already occurs at the time of transmission in interlaced scanning, and this distortion cannot be removed on the receiving side. Therefore, there has been proposed a system capable of improving the vertical resolution without causing aliasing even in the moving image area. This proposal is based on the literature "TV Society Technical Report Vo.
l. 14, No. 28, pp. 1-6, CE'90-1
9, BCS'90-25 "by Kawai, Yasuki et al. As" A study of progressive scanning / interlaced scanning conversion algorithm ". The contents of the above document will be described below.

FIG. 4 shows the structure of a television signal scanning line converter on the transmission side, and FIG. 5 shows the three-dimensional spectrum of a signal obtained at each part of this converter. Here, it is assumed that the 525 sequential scanning signals are converted into the interlaced scanning signals of the NTSC system and transmitted. Input terminal 1 has
Progressive scan signal with frame frequency 59.94Hz
25/1: 1 / 59.94) is input.
This signal is input to the adder 3 and the subtractor 4 together with the output delayed by 1/60 seconds via the delay circuit 2. It is also input to the motion detection circuit 17. The output of the adder 3 is input to the time expansion circuit 6 via the switch 5 which is turned on and off for each frame, and doubled in time (for converting the horizontal scanning speed due to the change of the frame frequency). The output of the subtractor 4 is also input to the time extension circuit 11 via the switch 10 which is turned on / off for each frame and is doubled in time (in order to convert the horizontal scanning speed due to the change of the frame frequency).

As a result, the input signals of 525/1: 1 / 59.94 are a frame sum average signal (hereinafter referred to as an intra-frame sum signal) in units of two frames and a frame difference average signal (hereinafter referred to as an intra-frame difference signal). 2) signals (525/1: 1 / 29.97).

The intra-frame sum signal is expanded by the time expansion circuit 6 and directly input to the mixer 7 and also to the vertical low pass filter (vertical LPF) 8. Vertical LPF
8, the vertical frequency band is 0-360 [TVL / PH]
The band is limited to, and the output is input to the multiprocessing circuit 9.
Further, the intra-frame difference signal is expanded by the time expansion circuit 11 and then similarly expanded to a two-dimensional low pass filter (2DLP).
F) is input to 12. The low-pass filter 12 limits the horizontal frequency band to 0 to 2.7 MHz and the vertical frequency band to 0 to 240 [TVL / PH]. The output of the horizontal low-pass filter 12 is the direct subtractor 13
Input to the vertical low pass filter (vertical LP
F) is input to 14. The vertical low-pass filter 14 performs band limitation in the vertical direction in the range of 0 to 120 [TVL / PH], and its output is input to the subtractor 13 and the line inverting circuit 15. Therefore, the output of the subtractor 13 becomes a high frequency component having a vertical band of 120 to 240 [TVL / PH] and is given to the multiplex processing circuit 9 as an auxiliary signal. In the line inversion circuit 15, the vertical band 0 to
The polarity of the low frequency component of 120 [TVL / PH] is inverted line by line, and the output is supplied to the adder 16.

The output of the subtractor 13 is input to the multiple signal processing circuit 9 as an auxiliary signal. The multiple signal processing circuit 9 multiplexes the auxiliary signal and the output of the vertical low pass filter 8. In the multiple signal processing circuit 9, as will be described in detail later, of the three-dimensional frequency band of the output from the vertical low-pass filter 8 which is the low-frequency component (0 to 15 Hz) in the temporal direction, the diagonal high-frequency component (horizontal 2 .0-4.0 [MHz], vertical 240-360 [TVL / PH]) are deleted, and the remaining component and the auxiliary signal are processed and multiplexed. This output is added to the output of the line inversion circuit 15 and the adder 1
It is added in 6 and input to the mixer 7.

The signal output from the adder 16 is a signal in the moving image mode. FIG. 5A shows the spectrum before the output (temporal high frequency component) of the adder 13 is line-inverted and the spectrum of the signal input to the adder 16.
become that way. 15 Hz in the temporal direction of FIG.
Vertical low-pass filter with spectrum up to 30Hz 1
4 output signal. When this signal is line-inverted,
It will shift to the vertical high range. The component of 0 to 15 Hz in FIG. 5A is the spectrum of the signal obtained from the multiplex processing circuit 9. The auxiliary signal from the adder 13 has been processed and exists in the dotted region in this spectrum. This processing will be described later. The signal output from the time extension circuit 6 is a signal in the still image mode, and its spectrum is shown in FIG.
become that way.

The mixer 7 selects and outputs two input signals according to the motion detection signal from the motion detection circuit 17. The output of the time expansion circuit 6 is a still image mode signal, and the band is limited to 0 to 15 [Hz] only in the temporal direction. On the other hand, the output of the subtractor 16 is a moving image mode signal. The signals of the respective modes are represented by three-dimensional frequency spectra as shown in FIGS. 5 (A) and 5 (B).

The output of the mixer 7 is 1 via the switch 8.
It is input to the switch 20 and the delay circuit 19 for each line.
The delay circuit 19 delays by 1/60 seconds. The switch 20 on the output side has a frame cycle (59.9 [Hz])
The selection is made in step S3 and the interlaced scanning signal of 525/2: 1 / 59.9 is derived. FIG. 6 shows the configuration of the scanning line converter on the receiving side that receives the signal transmitted from the transmitting side.

The input terminal 21 has 525/2: 1/5
An interlace scanning signal of 9.94 is input. This signal is
It is stored in the field buffers 23 and 24 via the switch 22 and is derived via the switch 25. The switch 22 is switched for each field (29.97 [Hz]), and the switch 25 is switched for each line. As a result,
The output of the switch 25 is scan-line converted into a sequential scan signal of 525/1: 1 / 29.97.

The output signal of the switch 25 is directly input to the subtracter 27 and also input to the vertical low pass filter (vertical LPF) 26, and the vertical 0 to 360 [TVL / P].
The output is band-limited to [H]. The output of the switch 25 is also input to the motion detection circuit 34. In the subtractor 27, the difference between the progressive scan signal and the vertical band limited signal is calculated, and the vertical 360 to 480 [TVL / P
The vertical high frequency component of [H] is generated. Note that this component is a vertical high-frequency component in the still image mode, but in the moving image mode, since it is a high-frequency component in the temporal direction that is frequency-shifted on the encoder side, it is frequency-shifted again by the line inversion circuit 29 to be a vertical low-frequency component. To the original area (Fig. 5)
(See (A)).

The vertical low-pass component output from the vertical low-pass filter 26 is input to the multiplex signal separation processing circuit 28. The multiplex signal separation processing circuit 28 separates and demodulates the auxiliary signal multiplexed (dot portion in FIG. 5A) on the encoder side in the moving image mode, and inputs it to the adder 30.
In the adder 30, the auxiliary signal is added to the output of the previous line inverting circuit 29 to reproduce the moving image mode signal. This reproduction signal is input to the mixer 31 and also to the mixer 33 via the polarity inverting circuit 32.

In the mixers 31 and 33, the motion detection circuit 34
The still image mode signal and the moving image mode signal are selected and output according to the motion detection signal from. In the adders 35 and 36,
The outputs of the mixers 31 and 33 and the temporal low frequency component after the auxiliary signal separation are added and output. The output of the adder 35 is input to the time compression circuit 37, time-compressed to 1/2, and supplied to one of the switches 40. Also adder 36
After being delayed by 1/60 seconds in the delay circuit 38, it is time-compressed to 1/2 in the time compression circuit 39 and input to the other of the switches 40. The switch 40 switches and selects the input in frame units (59.94 [Hz]) and derives it.

As a result, in the case of a still image, a progressive scanning signal (525/1: 1 / 59.94) having a frame frequency of 59.94 [Hz] is reproduced by field repetition. Also,
In the case of a moving image, the same frame frequency of 59.94 [H
z] progressive scan signals (525/1: 1 / 59.94) are reproduced. Having described the configuration of the scanning line converter, the multiple signal processing circuit 9 shown in FIG. 4 and the multiple signal separation processing circuit 28 shown in FIG. 6 will be further described.

FIG. 7A shows multiple signal processing on the transmitting side. Signals obtained by processing the intra-frame sum signal and the intra-frame difference signal whose band is limited in the horizontal and vertical directions are input to the input terminals 41 and 42, respectively. The in-frame sum signal is input to the subtractor 43 and the horizontal low pass filter (horizontal LPF) 44. In the horizontal low-pass filter 44, the output signal of the subtractor 43 is 1.2 [MH] because the horizontal direction is band-limited to 0 to 1.2 [MHz] for output.
z] or higher horizontal component. This horizontal high frequency component is
The line sub-sampling circuit 45 sub-samples for each line and inputs it to the vertical interpolation filter (vertical IPF) 46. In the vertical interpolation filter 46, the first field (2
(The first frame of the frame unit) is transmitted as it is, the second field signal is deleted, an interpolated signal interpolated from the first field is generated instead, and is input to the adder 47. It is added to the ingredients.

Next, the intra-frame difference signal (auxiliary signal) input from the input terminal 42 is band-limited to 0 to 1.35 [MHz] by the horizontal low pass filter (horizontal LPF) 48, and line sub-sample The signal is input to the circuit 49, is thinned out here, and is then 3.5 in the horizontal frequency shift circuit 50.
It is modulated at 8 [MHz] and output. This auxiliary signal is multiplexed with the output of the adder 47 (the interpolation signal of the second field) in the adder 51 and output to the output terminal 52.
This auxiliary signal is multiplexed only on the interpolated signal generated in the second field of the intra-frame sum signal, so that FIG.
The spectrum in the temporal direction is 0 to 15 Hz like the dot portion shown in FIG.

That is, when looking at the output signal of the vertical interpolation filter 46, the components in the temporal low range (0 to 15 Hz) and 1.2 MHz or more in the horizontal direction are as follows.
In the first field, it appears as a signal subsampled for each line, and in the second field, an interpolation signal created using the signal of the first field appears. The auxiliary signal (dot portion) is multiplexed in the adder 51 only to this interpolation signal. By doing so, the decoder side can create an interpolation signal from the signal of the first field. This is because the auxiliary signal can be reproduced by subtracting the interpolation signal from the second field multiplexed signal. Further, by subtracting the auxiliary signal from the multiplex signal, the reproduced signal of the second field can be obtained. Next, the receiving side multiplex signal separation processing circuit of FIG. 7B will be described.

The input terminal 61 is connected to the vertical 0-360 [TV
The signal of 525/1: 1 / 29.97 of [L / PH] is input. This signal is directly input to the subtractor 62 and the horizontal band pass filter (horizontal BPF) 63. In the horizontal band pass filter 63, 2.0 to 3.5
The band is limited to 8 [MHz] (a region where the auxiliary signal is multiplexed). Then, the vertical interpolation filter 64 receives the interpolation processing (first field signal), is input to the subtractor 65, and the difference is obtained from the through output of the vertical interpolation filter 64 (second field signal). The vertical interpolation filter 64 uses an interpolation filter having the same configuration as that on the transmission side, and generates an interpolation signal from the first field signal. Therefore,
When the subtracter 65 performs a difference calculation between the transmission signal (multiplexed signal of the second field) and the interpolation signal, the auxiliary signal can be separated. The separated auxiliary signal is input to the line sub-sampling circuit 66 and sub-sampled for each line, and then the horizontal frequency shift circuit 68 and the subtracter 6
2 is supplied. The subtracter 62 subtracts the auxiliary signal from the input signal (second field) of the input terminal 61 and outputs the in-frame sum signal before multiplexing to the output terminal 67. Further, the auxiliary signal demodulated at 3.58 [MHz] by the horizontal frequency shift circuit 68 is expanded in amplitude by 4 times by the coefficient unit 69, and 0 to 1.35 [MHz] by the horizontal low-pass filter 70.
The band is limited to 240 [TV
L / PH] and is output to the output terminal 72. With the system described above, even in the moving image area, there is no aliasing distortion due to progressive scanning conversion, and the vertical resolution can be improved.

The spectrum on the transmitting side in the moving image mode is shown in FIG. 5A, and the signal of this spectrum has a vertical low-pass filter 26 (shown in FIG. 6) on the receiving side.
When receiving a band limitation of 0 to 360 [TVL / PH],
If this characteristic is a narrow band, the vertical direction of the temporal high band (15 to 30 Hz) component 120 when the auxiliary signal is demodulated
A component near [TVL / PH] will be missing. Then, since the unnaturalness of the motion in the moving image area is conspicuous, it is necessary to set the characteristics of the vertical low-pass filter 26 to be wide to some extent.

However, if the vertical low-pass filter 26 has a wide pass band, vertical low-pass components 0 to 120 [TVL / PH] in the temporal high band (15 to 30 Hz) leak and appear as interference. ..

[0022]

As described above, in the case where the scanning line conversion of the television signal is performed and the temporal high frequency auxiliary signal is multiplexed and transmitted, in the conventional system, the band limitation is performed. Strict filter characteristic setting is required, and if a shift occurs, there is a problem that other components leak, or conversely, components that are originally necessary are missing. Therefore, an object of the present invention is to provide a multiplex signal transmission / reception apparatus which can prevent loss of necessary components and prevent leakage of unnecessary components.

[0023]

According to the present invention, a guard band is provided by shifting the auxiliary signal to a vertical high band before multiplexing to limit the band before multiplexing on the transmitting side. On the receiving side, the auxiliary signal is extracted by a vertical interpolation filter.

[0024]

By providing the guard band, it is possible to prevent the auxiliary signal from leaking on the transmitting side, so that the unnatural movement caused by the interference can be reduced.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. FIG. 1 (A) shows a transmitting side multiplex processing circuit, and FIG. 1 (B) shows a receiving side multiplex signal separation circuit.

In FIG. 1A, an input terminal 101 is supplied with an in-frame sum signal whose band is limited in the horizontal and vertical directions. That is, the signal from the vertical low pass filter 8 shown in FIG. 4 (temporal direction 0 to 15 Hz, vertical direction 360 [TVL / PH], horizontal direction 0 to 4.8 MH)
z)) is input. The in-frame sum signal is input to the subtractor 103 and the horizontal low pass filter (horizontal LPF) 104. In the horizontal low pass filter 104, the horizontal 0
Since the band is limited to ˜1.2 [MHz] for output, the output signal of the subtractor 103 becomes a horizontal high frequency component of 1.2 [MHz] or more. This horizontal high frequency component is subsampled line by line in the line subsampling circuit 105 and input to a vertical interpolation filter (vertical IPF) 106. In the vertical interpolation filter 106, the first field (first frame of 2 frame units) signal is transmitted as it is, the second field signal is deleted, and instead, an interpolated signal is generated from the first field to the adder 107. It is input and added to the original horizontal low frequency component here.

On the other hand, the intra-frame difference signal is supplied to the input terminal 102. This intraframe difference signal is supplied from the subtractor 13 shown in FIG. The intra-frame difference signal (temporal direction 15 Hz to 30 Hz, vertical direction 120 to 240 [TVL / PH]) is 0 to 1.3 in the horizontal direction by the horizontal low pass filter (horizontal LPF) 108.
5 [MHz] (120-240 [TVL / P in the vertical direction
H]) is band-limited (FIG. 2 (A)).

Next, in this system, the output of the horizontal low pass filter 108 is input to the vertical frequency shift circuit 109. In the vertical frequency shift circuit 109, 120
The shift process is performed mainly on [TVL]. As a result,
This output is 120 to 240 [TVL / P in the vertical direction.
H] and components of 0 to 120 [TVL / PH]. The spectrum can be represented as shown in FIG. Next, the output of the shift circuit 109 is a vertical band pass filter (vertical B
PF) 110. Vertical band pass filter 11
0 is a band pass characteristic as shown in FIG. In other words, high frequency components with high gain are not allowed to pass. Therefore, the output characteristic of the vertical band pass filter 110 can be expressed as shown in FIG.

The band-limited signal is input to the line sub-sampling circuit 111, sub-sampled line by line, supplied to the horizontal frequency shift circuit 112, and sub-sampled line by line. It is input to the horizontal frequency shift circuit 112 at the next stage. In the horizontal frequency shift circuit 112, fsc (color carrier 3.58 [MH
z]) is used to perform shift processing. The signal thus shifted is accompanied by a guard band G in FIG.
As shown in (D), it is input to the adder 113, and the adder 1
The signal from 07 is added. In this adder 113, it is added with the interpolation signal of the second field.

When processed as described above, the vicinity of 120 [TVL / PH] in the vertical direction with respect to the auxiliary signal and 360
A guard band can be provided near each of [TVL / PH]. That is, the auxiliary signal undergoes a vertical frequency shift as shown in FIG. 2B, is band-limited by the filter having the characteristic shown in FIG. 2E, and is given a guard band.
Next, every other field is added to the component on the side of the in-frame sum signal. Since the auxiliary signal at this time is multiplexed in the second field every other field, the frequency in the temporal direction is 0 to 15 Hz. Next, the receiving side will be described.

The input terminal 115 has a vertical range of 0 to 360 [T
VL / PH] 525/1: 1 / 29.97 signal is input. This signal corresponds to the vertical low-pass filter 2 shown in FIG.
8 is the signal obtained from This signal is a direct subtractor 1
19 and the horizontal band pass filter (horizontal BPF) 117. Horizontal bandpass filter 1
17, the band is limited to 2.0 to 3.58 [MHz]. After passing through the vertical interpolation filter 118, the subtracter 1
19 and the difference is taken with the through output of the vertical interpolation filter 118. The vertical interpolation filter 118 is
It has the same interpolation filter as the transmitting side and generates an interpolation signal from the first field signal. Therefore, in the subtractor 119, when the difference calculation of the interpolation signal is performed from the transmitted multiplex signal, the auxiliary signal is separated. The separated auxiliary signal (FIG. 3A) is input to the line sub-sampling circuit 66, sub-sampled for each line, and then supplied to the horizontal frequency shift circuit 122 and the subtractor 116. The subtractor 116 subtracts the auxiliary signal from the input signal (second field) of the input terminal 115 and outputs the in-frame sum signal before multiplexing to the output terminal 121. Further, the horizontal frequency shift circuit 122 performs demodulation processing at 3.58 [MHz] and frequency shifts in the horizontal direction. The auxiliary signal (FIG. 3 (B)) obtained by this is subjected to 4-fold amplitude expansion by the coefficient unit 123, and the horizontal low-pass filter 124 outputs 0-1.
The band is limited to 35 [MHz], and the vertical interpolation filter 12
5 is interpolated to 240 [TVL / PH]. Next, in order to return to the original polarity, the vertical frequency shift circuit 126 vertically shifts at 360 [TVL / PH], and the vertical band pass filter 127 band-limits to 240 [TVH / PH] or less. Then, as shown in FIG. 3C, the original auxiliary signal is accurately reproduced.

[0032]

As described above, according to the present invention, by providing a guard band for an auxiliary signal and performing multiplex transmission, a vertical high range (1) of a temporal high range (0 to 15 Hz) is obtained.
20 to 240 [TVL / PH] component auxiliary signal and temporal high vertical low range (0 to 120 [TVL / P]
It is possible to prevent crosstalk between the [H] component and naturalness of movement.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing a main part in an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a process of processing an auxiliary signal for explaining the operation of the multiplex signal transmission device of the present invention.

FIG. 3 is an explanatory view showing a process of processing an auxiliary signal for explaining the operation of the multiplex signal receiving apparatus of the present invention.

FIG. 4 is a block diagram showing a television signal scanning line conversion device in a conventional transmitter.

FIG. 5 is a spectrum explanatory view shown for explaining the operation of the television signal scanning line conversion device.

FIG. 6 is a block diagram showing a television signal scanning line conversion device in a conventional receiver.

7 is a circuit diagram showing each specific example of the multiple signal processing circuit shown in FIGS. 4 and 6. FIG.

[Explanation of symbols]

103 ... Subtractor, 104 ... Horizontal low-pass filter, 10
5 ... Line sub-sampling circuit, 106 ... Vertical interpolation filter, 107 ... Adder, 108 ... Horizontal low-pass filter,
109 ... Vertical frequency shift circuit, 110 ... Vertical band pass filter, 111 ... Line sub-sampling circuit, 112 ...
Horizontal frequency shift circuit, 113 ... Adder, 117 ... Horizontal band pass filter, 118 ... Vertical interpolation filter, 190
... Subtractor, 120 ... Line sub-sampling circuit, 122 ...
Horizontal frequency shift circuit, 123 ... Coefficient multiplier, 124 ... Horizontal low-pass filter, 125 ... Vertical interpolation filter, 126
... vertical frequency shift circuit 127 ... vertical low-pass filter.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location H04N 11/20 7337-5C

Claims (2)

[Claims] 1. An input non-interlaced signal is provided,
A first non-interlaced signal having a frame frequency of 1/2 of the input non-interlaced signal is obtained by performing a sum operation before and after the frame, and a 1-value of the input non-interlaced signal is obtained by performing a difference operation before and after the frame.
Scanning line conversion means for obtaining a second non-interlaced signal having a frame frequency of / 2, and a first moving image resolution signal from which the high frequency component of the vertical spatial frequency of the first non-interlaced signal has been removed After sampling, the vertical interpolation filter
An interpolation signal for interpolating the signal of the second field is generated by using the signal of the field to obtain an output signal of the second field, and the high frequency component of the vertical spatial frequency of the second non-interlaced signal is added to this output signal. Of the vertical spatial frequency of the second non-interlaced signal and the output signal of the multiplex signal processing means, and the polarities are line by line. A moving picture mode processing means for adding the inverted signal, a switching means for selectively outputting the first non-interlaced signal and the output signal of the moving picture mode processing means in accordance with the movement of the image, and a switching means of the switching means. An interlace which outputs an output signal and a delayed signal obtained by delaying the output signal for one frame period in a first field and a second field, respectively. In the television signal scanning line conversion apparatus including the analog-to-digital conversion means, the multiple signal processing means multiplexes the high frequency component of the vertical spatial frequency of the second non-interlaced signal with the output signal of the second field. The second non-interlaced signal has a high frequency component of the vertical spatial frequency frequency-shifted in the vertical direction, and then the signal that has passed through the vertical band limiting means and the vertical sub-sampling means is used as the auxiliary signal. A multiple signal transmission device that adds to the output signals of two fields. 2. A scanning line conversion means for converting an input interlaced signal into a non-interlaced signal having the same frame frequency and outputting the non-interlaced signal, and separating the non-interlaced signal into a high frequency component and a low frequency component of a vertical spatial frequency. A vertical spatial frequency separation filter and a low frequency component of the vertical spatial frequency are used by the vertical interpolation filter to generate an interpolation signal for interpolating the second field using the signal of the first field to obtain a second field signal, A difference operation is performed between the second field signal and the transmitted second field multiplexed signal, and an auxiliary signal is obtained by sub-sampling in the vertical direction, and the auxiliary signal is subtracted from the multiplexed signal in the second field. As a result, the multiple signal separation processing means for obtaining the reproduced signal and the high frequency component of the vertical spatial frequency are A video mode processing means for adding the auxiliary signal to a signal obtained by inverting the polarity for each IN and outputting the video mode signal as a video mode signal, and the video mode signal and the high frequency component of the vertical spatial frequency. First switching means adapted to the image movement and selectively outputting, and second switching means adapted to the image movement and selectively outputting the inversion signal of the signal for the moving image mode and the high frequency component of the vertical spatial frequency. And a reproduction signal is added to the output signal of the first switching means to generate a first reproduction signal, and a reproduction signal is added to the output signal of the second switching means to generate a second reproduction signal. Then, the television signal scanning line conversion apparatus is provided with means for delaying the second reproduction signal by one field and selectively selecting and outputting the delayed second reproduction signal and the first reproduction signal for each field. Oite, the multiplexed signal separating means is multiplexed signal receiving apparatus, characterized in that it comprises means for band-limited by frequency shifting the auxiliary signal in the vertical direction.