JPH0638179A - High definition television receiver - Google Patents

Abstract

PURPOSE:To provide the high definition television receiver in which picture quality as a high definition television signal is obtained by using a MUSE signal decode processing section employing a linear filter so as to apply decode processing to the MUSE signal simply and efficiently. CONSTITUTION:A still picture system of a MUSE signal is processed by still picture system processing circuits 3, 4, and a moving picture system of the MUSE signal is processed by a moving picture system processing circuit (in-field interpolation circuit) 5. The signal of the still picture system and the signal of the moving picture system are inputted to a mixer 7, in which they are mixed adaptively by using a motion detection signal outputted from a motion detection circuit 6. When an NTSC signal is obtained by a motion adaptive processing signal outputted from the mixer 7, the scanning line is converted by a scanning line conversion section after a scanning line conversion pre-filter 8. Moreover, when the high definition television signal is obtained by the motion adaptive processing signal, a motion area residual loopback elimination circuit 13 eliminates a remaining loopback component.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transmits MUSE signals to NTS.
The present invention relates to a high-definition television receiver that includes a MUSE-NTSC conversion processing device for converting into a C signal and that simply and efficiently decodes a MUSE signal to obtain a high-definition television signal.

[0002]

2. Description of the Related Art A MUSE system has been proposed in which a high-definition television signal is compressed and can be transmitted by satellite broadcasting, and a test broadcasting is being conducted. Regarding the MUSE system, various documents (for example, P189 to P21 of “Nikkei Electronics”, November 2, 1987, published by Nikkei Electronics Co., Ltd.)
2 "Transmission system for high-definition broadcasting using satellite MUSE"
Etc.), detailed description thereof will be omitted here.

A high-definition television receiver receives and demodulates a band-compressed MUSE signal. The number of scanning lines of the high-definition television signal demodulated by the high-definition television receiver is 1125.
A MUSE-NTSC conversion processing device (commonly called a down converter) converts scan lines into 525 lines so that a high-definition television signal of a book can be received by an NTSC receiver. MUSE-NTSC conversion processor is MU
It consists of an SE signal decoding processor and a scanning line converter.
The decoding processing unit has a simpler processing method than that of a high-definition television receiver. At the present time, high-definition television receivers are expensive, so inexpensive MUSE-NTSC conversion processing devices are becoming more popular.

FIG. 7 is a block diagram showing the configuration of a MUSE-NTSC conversion processing device. Here, the processing of the luminance signal is shown. In FIG. 7, a MUSE signal (multiple sub-sample transmission signal that is signal-compressed by offset sampling between fields, frames and lines) input to the input terminal is input to the A / D converter 1 and is at 16.2 MHz. Are re-sampled with the clock signal of to be a digital signal. The signal output from the A / D converter 1 is input to the de-emphasis circuit 2 and subjected to de-emphasis processing. The signal output from the de-emphasis circuit 2 is input to the inter-frame interpolation circuit 3 for still image processing, the field interpolation circuit 5 for moving image processing, and the motion detection circuit 6.

In the still image processing, the inter-frame interpolation circuit 3 interpolates the pixel one frame before into the MUSE signal which has been subjected to the inter-frame / inter-line offset sampling, as shown in FIG. . The signal inter-frame interpolated and output from the inter-frame interpolating circuit 3 is input to the inter-field aliasing removing circuit 4, the inter-field aliasing is removed, and the signal is output at a signal rate of 32.4 MHz. This inter-field folding removal is described in detail, for example, in the prior application by the present applicant, Japanese Patent Application No. 63-331298. The inter-frame interpolation circuit 3
The inter-field aliasing removing circuit 4 is a still image processing circuit. On the other hand, in the moving image processing, the field interpolation circuit 5, which is a moving image processing circuit, interpolates pixels within the field, as shown in FIG. The field interpolation circuit 5 is a one-dimensional field interpolation filter having the characteristics shown in FIG. 9, and the field interpolation processing of the moving image processing is output at a signal rate of 32.4 MHz by this filter. This is achieved in an extremely simple way.

The signals of the still image processing and the moving image processing, which have a signal rate of 32.4 MHz by these processes, are input to the mixer 7. The motion detection signal detected by the motion detection circuit 6 is input to the mixer 7, and the signals for still image processing and moving image processing are mixed by the motion detection signal.
Adapted and mixed by. Up to the output of this mixer 7 is M
It is a USE signal decoding processing unit, and a scanning line conversion unit is provided in the subsequent stage.

The signal output from the mixer 7 is input to the scanning line conversion prefilter 8. The scanning line conversion pre-filter 8 is a vertical filter that suppresses aliasing in advance when thinning out 1125 scanning lines from 525 scanning lines. The signal output from the scan line conversion pre-filter 8 is input to the speed conversion memory 9. The speed conversion memory 9 writes the number of scanning lines according to the conversion ratio of the scanning lines at a signal rate of 32.4 MHz and reads it with a clock of 525 lines area according to the conversion ratio. The signal converted into 525 scanning lines by the speed conversion memory 9 is the NTSC output processing circuit 10.
, The NTSC output processing circuit 10 replaces the blanking, adds a sync signal conforming to the NTSC system,
Image quality adjustment such as image enhancement processing is performed. The signal that has been subjected to the above processing is input to the D / A converter 11 and returned to an analog signal, and a scanning line converted luminance signal is output from the output terminal.

[0008]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Since the USE-NTSC conversion processing device performs scanning line conversion after finishing the decoding process of the MUSE signal,
It is possible to extract the signals of 1125 scanning lines that have been subjected to the motion adaptive processing from the points. As described above, since a high-definition television receiver is expensive, it is conceivable to take out the signals of 1125 scanning lines using the MUSE-NTSC conversion processing device configured as shown in FIG. However, the aliasing component of the moving region generated by simplifying the field interpolation circuit 5 remains at the point A, and the image quality as a high-definition television signal cannot be obtained as it is.

This point will be described in more detail. FIG. 10 shows the characteristics of the MUSE signal spectrum in the moving region and the one-dimensional field interpolation filter (field interpolation circuit 5). The folding component of the moving region has a horizontal frequency of 1
As shown in the figure, the carrier has a frequency of 6.2 MHz and a vertical frequency of 1125/4 cph. In order to remove this aliasing component (portion indicated by "+"), the diagonal direction must be suppressed by a two-dimensional field interpolation filter. Since the two-dimensional field interpolation filter has an enormous circuit scale, it is difficult to use it in an inexpensive MUSE-NTSC conversion processing device.

In the MUSE-NTSC conversion processing apparatus shown in FIG. 7, the field interpolation circuit 5 which is a one-dimensional field interpolation filter has the characteristics shown in FIG. Horizontal frequency about 12MHz
It suppresses the above. Therefore, at point A, the folded-back component of the moving region remains in the spectral region shown by the diagonal lines having a horizontal frequency of about 12 MHz or less. On the other hand, the scanning line conversion pre-filter 8 in the scanning line conversion unit suppresses the aliasing component in the vertical band centered at 1125/4 cph as shown in FIG. 10, and as a result, the aliasing component in the moving region is removed. To be done. Therefore, when the MUSE signal decoding processing unit is configured on the premise of scanning line conversion, a one-dimensional field interpolation filter is sufficient as the field interpolation circuit 5, and the horizontal frequency is about 12 MH.
It is not necessary to remove the folding component of the moving region remaining in the spectral region indicated by the diagonal line below z. However, when a high-definition television signal with 1125 scanning lines is taken out from the mixer 7, this aliasing component becomes a problem, and it has been required to effectively solve this problem.

The present invention has been made in view of the above problems, and a MUSE signal decoding processing unit using a one-dimensional field interpolation filter and having a small circuit scale simply and efficiently decodes a MUSE signal. In addition, it is an object of the present invention to provide a high-definition television receiver capable of obtaining an image quality as a high-definition television signal.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention applies A / D conversion to a multiple sub-sample transmission signal which is offset-sampled between fields, frames and lines. A still image processing circuit for processing and outputting a signal that has been D-converted and de-emphasis processed between frames and between fields;
A moving picture processing circuit for A / D converting the multi-subsample transmission signal and interpolating and outputting the signal obtained by de-emphasis processing, and A / D converting the multi-sub-sample transmission signal and de-emphasis processing. A motion detection circuit that detects a motion area of an image from the generated signal and outputs a motion detection signal, and the motion detection signal adaptively mixes the output signal of the still image processing circuit and the output signal of the moving image processing circuit. And outputs a motion adaptive processing signal, and a folding component remaining in the motion adaptive processing signal output from the mixer is removed by the output signal of the moving image processing circuit and the motion detection signal and output. A moving area residual aliasing removing circuit, a time expanding circuit for time-expanding an output signal of the moving area residual aliasing removing circuit, and the time expanding circuit. The output signal is intended to provide a high-definition television receiver, characterized in that it is configured with a D / A converter to obtain a high definition television signal into D / A.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A high-definition television receiver according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing an embodiment of a high-definition television receiver of the present invention, FIG. 2 is a block diagram showing a concrete configuration of a moving area residual aliasing removing circuit 13 in FIG. 1, and FIG. 3 is a moving area. FIG. 4 is a diagram showing the characteristics of the MUSE signal spectrum and the moving region residual aliasing removal circuit 13, FIG. 4 is a diagram showing the frequency characteristics of the gain adjuster 133 in FIG. 2, and FIG. 5 is a concrete example of the C / N detection circuit 12 in FIG. FIG. 6 is a block diagram showing a physical configuration, and FIG. 6 is a waveform diagram for explaining the C / N detection circuit 12. In addition, in FIG.
The same parts as those in FIG.

As shown in FIG. 1, what is newly added by the present invention is a C / N detection circuit 12, a moving area residual aliasing removal circuit 13, a 12/11 time extension circuit 14, and a D / A converter 15. is there. In FIG. 1, the motion adaptive processing signal output from the mixer 7 is input to the scanning line conversion prefilter 8 and the moving region residual aliasing removal circuit 13. In the moving area residual aliasing removing circuit 13, a moving image processing signal output from the field interpolation circuit 5, a motion detection signal output from the motion detecting circuit 6, and a C / N detecting circuit 12 described in detail later. The noise amount determination signal output from the above is input. The moving region residual aliasing removing circuit 13 removes the remaining aliasing component of the moving region and inputs it to the 12 / 11-hour expansion circuit 14. Moving area residual loopback removal circuit 13
The specific configuration and the operation thereof will be described later in detail. And 1
The 2/11 time expansion circuit 14 performs 12/11 time expansion for the time compression of the luminance signal on the sending side. The time-expanded signal is input to the D / A converter 15 and converted back to an analog signal, and the luminance signal of the high-definition television signal of 1125 scanning lines from which the aliasing component is completely removed is output from the output terminal. It

Here, a specific structure of the moving region residual aliasing removing circuit 13 and its operation (aliasing component removing processing) will be described. In FIG. 2, the moving image processing signal output from the field interpolation circuit 5 is input to the vertical high-pass filter 131 which is a one-dimensional filter. Here, the spectrum of the moving image processing signal output from the field interpolation circuit 5 is as shown in FIG. 3, and the field interpolation circuit 5 suppresses the band of the horizontal frequency of 12 MHz or more. As shown in FIG. 3, the vertical high-pass filter 131 uses a band centered on the vertical frequency 1125/4 cph of the moving image processing signal as a pass band. The signal that has passed through the vertical high-pass filter 131 is a horizontal low-pass filter 13 that is a one-dimensional filter.
2 and the band of horizontal frequency 4 MHz or more is suppressed. The band of the signal output from the horizontal low-pass filter 132 is the filter area B in FIG. The signal output from the horizontal low-pass filter 132 is input to the first gain adjuster 133, and the level of the pass band is determined by the gain adjuster 133. The setting value of the gain adjuster 133 will be described later.

The signal output from the gain adjustor 133 is input to the first subtractor 135. Subtractor 135
The signal output from the vertical high-pass filter 131 is also input to the subtractor 135.
3 is obtained by subtracting the filter area B obtained at the output of the gain adjuster 133 from the band obtained at the output of 1. This filter area A is the pass band of the vertical high-pass filter 131 and the horizontal low-pass filter 13
It is a band consisting of two cutoff regions, a vertical high region centering on a vertical frequency of 1125/4 cph in the vertical direction and a horizontal high region having a horizontal frequency of about 4 MHz or more in the horizontal direction. This band covers the folding component of the moving region as shown in FIG.

Further, the signal output from the subtractor 135 and the motion detection signal output from the motion detection circuit 6 are input to the second gain adjuster 136.
The gain adjuster 136 controls the gain by the motion detection signal,
The level of the pass band of the filter area A is determined. Usually, the gain control by the motion detection signal is controlled by 3 bits to 4 bits, and the boundary between the still image and the moving image is switched stepwise. The sampling of the loopback component of the moving image here is the same as the mixing ratio in the mixer 7. The signal output from the gain adjuster 136 is input to the second subtractor 137, and the motion adaptive processing signal output from the mixer 7 is input. The subtractor 137 subtracts the signal output from the gain adjuster 136 from the motion adaptive processing signal. As a result, the filter region A shown in FIG. 3 is extracted from the motion adaptive processing signal, and the spectral region (portion indicated by “+”) which is the folding component remaining in the moving region is canceled.

The moving region residual folding back removing circuit 1 described above
By the processing of 3, the folding component of the moving area is removed, and all the folding components of the MUSE signal are removed together with the folding components between the fields and the frames which are removed by the processing up to the mixer 7.

Next, the set value set in the first gain adjuster 133 will be described. One of the first gain setting value and the second gain setting value selected by the selector 134 is input to the gain adjuster 133. The noise amount determination signal output from the C / N detection circuit 12 is input to the control input terminal of the selector 134, and either the first gain setting value or the second gain setting value is selected by the noise amount determination signal. Is configured to. As described above, the gain adjuster 133 has the filter region B shown in FIG.
It controls the gain of. FIG. 4 shows the gain adjuster 133.
The horizontal frequency characteristic of the vertical frequency of 1125/4 cph is shown, and the gain adjuster 133 adjusts the gain of the filter region B from 0 to 1 as shown in FIG.

As for the two setting values of the first and second gain setting values which are switched by the noise amount determination signal, the first gain setting value with a gain of about 0.5 to 1 is set when the noise amount is small. If the noise amount is large, the gain is 0 to 0.
A second gain setting value of about 5 is set. By the way, in order to obtain the quality of the moving range of high-definition television signals,
Although it is necessary to reproduce the filter area B shown in FIG. 3 which is a vertical high frequency band, there is a problem that horizontal stripe interference appears in this area B when the C / N of the transmission signal deteriorates. Therefore, by the selector 134, the first gain setting value and the second gain setting value
The gain setting value is changed to S / N of the decoded video signal by suppressing the gain when the C / N of the transmission signal is deteriorated and reducing noise in the filter area B.
This is to improve N.

Here, C / which outputs a noise amount determination signal
A specific configuration and operation of the N detection circuit 12 will be described. The motion detection signal output from the detection circuit 6 is input to the C / N detection circuit 12. The C / N detection circuit 12 is
As shown in FIG. 5, the gate 121, the first comparator 12
2, a counter 123, a second comparator 124, and a D flip-flop (DFF) 125. In FIG. 5, the motion detection signal output from the detection circuit 6 is input to the gate 121. A clamp pulse shown in FIG. 6B for clamping the clamp level line in the clamp period of the MUSE signal shown in FIG. 6A is also input to the gate 121. The gate 121 extracts the motion detection signal of the clamp level line by the clamp pulse as shown in FIG. 6C. The motion detection signal is a difference signal between frames or between two frames, and the clamp level line of the MUSE signal is regulated to a constant value. Therefore, when C / N is good, the motion detection signal of the clamp level line is output. Not done. C / N
When is worse, the level and frequency of the motion detection signal on the clamp level line increases in proportion to the degree of deterioration.

Then, the comparator 122 is input to FIG.
The motion detection signal of the clamp level line having a gradation of about 4 bits shown in (c) is compared with the first comparison value which is the reference level also shown in FIG. 6 (c), and shown in FIG. 6 (d). As shown, when the motion detection signal is equal to or higher than the first comparison value, a binary signal that becomes high is output. 2 output from the comparator 122
The value signal is input to the counter 123, which is enabled when the output of the comparator 122 is high,
It counts up with a clock that matches the data rate of the motion detection signal, for example, a 16.2 MHz clock.
The reset pulse shown in FIG. 6 (e) is input to the counter 123, and the counter 123 initializes the count value at the head of the clamp level line by the reset pulse. As shown in FIG. Count the frequency of.

Further, the output of the counter 123 is the comparator 1
24, and the comparator 124 compares the count value of the counter 123 shown in FIG. 6 (f) with the second comparison value shown in FIG. 6 (f), as shown in FIG. 6 (g). And outputs a signal that becomes high when the count value is equal to or higher than the second comparison value that is the reference level. That is, it becomes high when the noise amount is large and becomes low when the noise amount is small. The output of the comparator 124 is input to the DFF 125 and held up to the next clamp level line by the hold clock shown in FIG. 6 (h). The hold clock input to the DFF 125 is located at the end of the clamp level line as shown in FIG. 6 (h), and the DFF 125 holds the determination result of the noise amount, so its output is shown in FIG. 6 (i). Like

The high-definition television receiver of the present invention has the above-mentioned configuration and uses the MUSE-NTSC conversion processing device having a small circuit scale and using the one-dimensional field interpolation filter (field interpolation circuit 5). And this MUS
The high-definition television signal is configured so as to obtain the high-definition television signal by removing the folding component of the moving region remaining in the motion adaptive processing signal output from the MUSE signal decoding processing unit in the E-NTSC conversion processing device. Image quality can be obtained, and further, the C / N detection circuit 1
Since the number 2 is provided, it is possible to improve the S / N of the video signal when the C / N is deteriorated.

[0025]

As described in detail above, the high-definition television receiver of the present invention is simple and efficient by the MUSE signal decoding processing section using the one-dimensional field interpolation filter having a small circuit scale. Since the MUSE signal is decoded and the aliasing component remaining in the moving area of the decoded signal is removed to obtain a high-definition television signal, the circuit scale is large and the cost of the apparatus is low. This MUSE signal decoding process can be used to obtain an image quality as a high-definition television signal with a simple circuit configuration without using a two-dimensional field interpolation filter, and also to obtain an NTSC signal from this decoded signal. The department is extremely efficient. Further, since the characteristic of the residual aliasing removal is controlled by the noise detection circuit that detects the noise component of the transmission signal, it is possible to prevent the horizontal stripe interference that occurs when the C / N of the transmission signal deteriorates. The S / N ratio of the video signal can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a high-definition television receiver of the present invention.

FIG. 2 is a block diagram showing a specific configuration of a moving region residual aliasing removing circuit 13 in FIG.

FIG. 3 is a diagram showing characteristics of a moving region MUSE signal spectrum and a moving region residual aliasing removing circuit 13;

FIG. 4 is a diagram showing frequency characteristics of a gain adjuster 133 in FIG.

5 is a block diagram showing a specific configuration of a C / N detection circuit 12 in FIG.

FIG. 6 is a waveform diagram for explaining a C / N detection circuit 12.

FIG. 7 is a block diagram showing a configuration of a MUSE-NTSC conversion processing device.

FIG. 8 is a diagram for explaining interframe interpolation and field interpolation of a MUSE signal.

9 is a characteristic diagram of the field interpolation circuit 5. FIG.

10 is a diagram showing the characteristics of the MUSE signal spectrum in the moving region and the field interpolation circuit 5. FIG.

[Explanation of symbols]

 1 A / D converter 2 De-emphasis circuit 3 Inter-frame interpolation circuit 4 Inter-field folding removal circuit 5 Field interpolation circuit 6 Motion detection circuit 7 Mixer 8 Scan line conversion pre-filter 9 Velocity conversion memory 10 NTSC output processing Circuits 11 and 15 D / A converter 12 C / N detection circuit (noise detection circuit) 13 Moving area residual aliasing removal circuit 14 12/11 Time extension circuit

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[Submission date] October 22, 1992

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[Submission date] July 12, 1993

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[Claims]

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In the still image processing, the inter-frame interpolation circuit 3 interpolates the pixel one frame before into the MUSE signal which has been subjected to the inter-frame / inter-line offset sampling, as shown in FIG. . The signal inter-frame interpolated and output from the inter-frame interpolating circuit 3 is input to the inter-field aliasing removing circuit 4, the inter-field aliasing is removed, and the signal is output at a signal rate of 32.4 MHz. This inter-field aliasing removal is described in detail in, for example, the prior application by the present applicant, Japanese Patent Application No. 63-331298 or Japanese Patent Application No. 3-235523. The interframe interpolating circuit 3 and the interfield foldback removing circuit 4 are still image processing circuits. On the other hand, in the moving image processing, the field interpolation circuit 5, which is a moving image processing circuit, interpolates pixels within the field, as shown in FIG. The field interpolation circuit 5 is a one-dimensional field interpolation filter having the characteristics shown in FIG. 9, and the field interpolation processing of the moving image processing is output at a signal rate of 32.4 MHz by this filter. This is achieved in an extremely simple way.

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[0012]

In order to solve the above-mentioned problems of the prior art, the present invention provides (1) a multiple sub-sample transmission signal, which is signal-compressed by offset sampling between fields, frames and lines. A / D-converted and de-emphasis processed signal which is processed and output between frames and fields, and a signal which is A / D-converted and de-emphasis processed by the multiple sub-sample transmission signal And a moving image processing circuit that interpolates and outputs the one-dimensional field, and a motion that A / D-converts the multi-subsample transmission signal and detects a motion area of the image from the de-emphasis processed signal and outputs a motion detection signal A detection circuit, an output signal of the still image processing circuit and an output signal of the moving image processing circuit according to the motion detection signal. A mixer for adaptively mixing and outputting a motion adaptive processing signal, and a folding component remaining in the motion adaptive processing signal output from the mixer is removed by the output signal of the moving image processing circuit and the motion detection signal. To output the moving area residual aliasing removal circuit, a time expanding circuit for time-expanding the output signal of the moving area residual aliasing removing circuit, and a high-quality D / A conversion of the output signal of the time expanding circuit. A high-definition television receiver characterized by comprising a D / A converter for obtaining a television signal, and (2) a signal which is offset-sampled between fields, frames and lines. A still image processing circuit for A / D converting a compressed multi-subsample transmission signal and processing and outputting the de-emphasis processed signal between frames and fields. And a moving picture processing circuit for A / D converting the multi-subsample transmission signal and interpolating and outputting the de-emphasis-processed signal in a one-dimensional field. A motion detection circuit that detects a motion area of an image from a signal subjected to emphasis processing and outputs a motion detection signal, and an output signal of the still image processing circuit and an output signal of the moving image processing circuit are adapted by the motion detection signal. A mixer for mixing and outputting a motion adaptive processed signal;
A motion area residual aliasing removal circuit for removing the aliasing component remaining in the motion adaptive processing signal output from the mixer by the output signal of the moving image processing circuit and the motion detection signal, and outputting the motion area residual aliasing removal circuit. A time expansion circuit for time-expanding the output signal of the aliasing removal circuit, a D / A converter for D / A converting the output signal of the time expansion circuit to obtain a high-definition television signal, and the mixer A high-definition television receiver provided with a scanning line conversion unit for converting an output motion adaptive processed signal into a scanning line and outputting the converted signal.

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The high-definition television receiver of the present invention has the above-mentioned configuration and uses the MUSE-NTSC conversion processing device having a small circuit scale and using the one-dimensional field interpolation filter (field interpolation circuit 5). And this MUS
Since the high-definition television signal is obtained by removing the aliasing component of the moving region remaining in the motion adaptive processing signal output from the MUSE signal decoding processing unit in the E-NTSC conversion processing device, a high-definition television signal is obtained. Image quality of C / N detection circuit 12
Since the above is provided, it is possible to improve the S / N of the video signal when the C / N is deteriorated.

Claims (2)

[Claims] 1. A multi-subsample transmission signal, which is signal-compressed by offset sampling between fields, frames and lines, is A / D converted, and a de-emphasis processed signal is processed between frames and fields. A still image processing circuit for outputting, a moving image processing circuit for A / D converting the multi-subsample transmission signal and interpolating and outputting the de-emphasis processed signal in a one-dimensional field, and the multi-subsample transmission signal A motion detection circuit for detecting a motion area of an image from the A / D converted and de-emphasis processed signal and outputting a motion detection signal, and an output signal of the still image processing circuit and the moving image processing by the motion detection signal. A mixer that adaptively mixes the output signal of the circuit and outputs a motion adaptive processing signal, and an output from the mixer And a motion region residual aliasing removal circuit for removing the aliasing component remaining in the motion adaptive processing signal by the output signal of the moving image processing circuit and the motion detection signal, and an output of the motion area residual aliasing removal circuit. A time expansion circuit for time-expanding and outputting a signal, and a D / A converter for D / A converting the output signal of the time expansion circuit to obtain a high-definition television signal. And a high-definition television receiver. 2. A noise detection circuit for detecting a noise component of the multiplex subsample transmission signal by a signal of a portion defined by a constant value in the multiplex subsample transmission signal, wherein the residual signal is obtained by an output signal of the noise detection circuit. The high-definition television receiver according to claim 1, wherein the high-definition television receiver is configured to control the characteristics of the aliasing elimination circuit.