JPH09312787A - Image orientation adaptive temporal processor - Google Patents

Abstract

(57) Abstract: A conventional temporal processing device performs uniform processing regardless of the directionality of an image. It was difficult to separate the signal and the image signal. A temporal processing apparatus according to the present invention has an integrated low-pass filter unit including at least one filter having a specific direction dependency on a two-dimensional frequency characteristic, and a specific direction dependency on a two-dimensional frequency characteristic. The integrated high-pass filter section 11 and a signal obtained by adaptively attenuating the high-frequency component by performing temporal filter processing on the output signal of the integrated high-pass filter section based on the image direction information input from the outside. And the output signal of the integrated low-pass filter unit 1 is added to the output signal of the temporal processing unit 2, and the obtained added output signal of the image direction adaptive temporal processing apparatus of the present invention is added. And an adder 12 for outputting as an output signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporal processing device for a television image signal or the like, and in particular, for a pattern having a direction dependence on a two-dimensional plane, a temporal motion adapted to the direction. Regarding a processing device.

[0002]

2. Description of the Related Art Conventionally, temporal filters have been well known in the field of image signal processing and have been used for removing unnecessary signals such as noise. However, temporal processing such as temporal filtering by this method is irrelevant to the directionality of an image. , Uniform processing has been performed.

[0003]

In this case, a uniform high frequency signal is used as the input signal of the temporal filter, and the temporal gain coefficient is also fixed. For this reason, it is difficult to separate an interference signal such as folding or noise from an image signal with respect to a pattern having a direction dependency on a two-dimensional plane. The information also has to be sacrificed, which causes a problem that the interfering signal cannot be sufficiently separated and removed from the image signal.

An object of the present invention is to solve the above-mentioned problems and to separate the interfering signal from the image signal by using the information on the directionality of the image in the temporal processing and changing the content of the temporal processing in accordance with the directionality. Therefore, it is an object of the present invention to provide a directional adaptive temporal processing device that can remove interference signals without deteriorating the image quality and improve the image quality for a pattern having a direction dependency on a two-dimensional plane.

[0005]

In order to achieve the above-mentioned object, the image direction adaptive type temporal processing device of the present invention comprises two steps.
At least 1 with a specific direction dependence on the dimensional frequency characteristics
An integrated low-pass filter section including a number of filters, an integrated high-pass filter section having a two-dimensional frequency characteristic with a specific direction dependency, and an externally input signal to the output signal of the integrated high-pass filter section A temporal processing unit that outputs a signal in which a high-frequency component is adaptively attenuated by performing temporal filtering on the basis of image direction information, and an output signal of the integrated low-pass filter unit is added to the output signal of the temporal processing unit. A first adder for adding and outputting the obtained addition output signal as an output signal of the image direction adaptive type temporal processing device is included.

Also, in the image directionality adaptive temporal processing apparatus of the present invention, the integrated low-pass filter section has a two-dimensional frequency characteristic which is line-symmetric in each of vertical and horizontal directions with respect to the origin.
A two-dimensional low-pass filter having no specific direction dependence in the two-dimensional frequency characteristic, at least one low-pass filter having a specific direction dependence in the two-dimensional frequency characteristic, and the specific direction dependence The two-dimensional low-pass filter output signal and the output signal of at least one low-pass filter having the specific direction dependence are weighted and added based on the image direction information and output. It is characterized in that it includes an integrated processing section.

Further, in the image direction adaptive type temporal processing device of the present invention, the image direction information has a specific direction of the low pass filter having the specific direction dependency included in the integrated low pass filter section. A maximum value selection circuit for selecting and outputting a maximum level signal from the first to nth level signals, and the first to nth level signals respectively A sum total calculation circuit for calculating and outputting the sum of the first to nth level signals,
A first coefficient calculation circuit for calculating and outputting a gain coefficient a (0 ≦ a ≦ 1) based on each output signal of the maximum value selection circuit and the sum calculation circuit, the maximum value selection circuit, and the sum calculation Each output signal of the circuit and the (i + 1) th (0 ≦ i
≤n-1) based on the level signal b _i (0 ≤
second to (n + 1) for calculating and outputting b _i ≦ 1)
Of the coefficient calculation circuit of 2 and not having the specific direction dependency
A first multiplier that multiplies the output signal of the dimensional low-pass filter by the gain coefficient a, and the first to nth low multipliers that have the specific direction dependence and differ from each other in the specific direction dependence. A second to a (n + 1) th multiplier for respectively multiplying an output signal of the (i + 1) th low pass filter of the band pass filters by a gain coefficient b _i ;
To a second adder for adding and outputting the output signals of the (n + 1) th multipliers.

Also, in the image direction adaptive temporal processing apparatus of the present invention, the integrated low pass filter section includes six low pass filters having the specific direction dependence, and the scanning direction of the image signal on the display. Is 0 °,
The specific direction dependence of each low pass filter is 0
°, 30 °, 60 °, 90 °, 120 ° and 150 °
It is characterized by being.

In the image orientation adaptive temporal processing apparatus of the present invention, the integrated high pass filter section subtracts the output signal of the integrated low pass filter section from the input signal of the integrated low pass filter section. It is characterized by comprising a first subtractor.

Further, in the image orientation adaptive temporal processing apparatus of the present invention, the temporal processing unit multiplies an input signal of the temporal processing unit by α based on the image orientation information (0 ≦ α ≦ 1). A variable gain control unit for outputting and a third output signal of the variable gain control unit is branched into two and one of them is supplied as an addition or addition signal, and the output signal is output as an output signal of the temporal processing unit. An adder, a delay circuit to which the output signal of the third adder is input, a second subtracter that subtracts the other of the two branched signals from the output signal of the delay circuit, and outputs the second subtracter; Of the output signal of the subtractor of β is multiplied by β (0 ≦ β
≦ 1) and a temporal gain output section for supplying the added or added signal to the third adder, respectively.

Further, in the image orientation adaptive temporal processing apparatus of the present invention, the image orientation information has a specific direction of the low pass filter having the specific direction dependency included in the integrated low pass filter section. A maximum value selection circuit for selecting and outputting a maximum level signal from the level signals for each of the specific directions, and an output signal of the maximum value selection circuit. A coefficient calculation circuit that calculates and outputs a gain coefficient α (0 ≦ α ≦ 1) based on the above, and an input signal of the variable gain control unit is multiplied by the gain coefficient α to output an output signal of the variable gain control unit. And a (n + 2) th multiplier for outputting as a signal.

Further, in the image orientation adaptive temporal processing apparatus of the present invention, the image orientation information has a specific direction of a low pass filter having the specific direction dependency included in the integrated low pass filter section. Based on the output signal of the maximum value selection circuit, which selects the maximum level signal from the level signals for each of the specific directions and outputs the selected level signal. And a coefficient calculation circuit for calculating and outputting a gain coefficient β (0 ≦ β ≦ 1), and an input signal of the temporal gain output section is multiplied by the gain coefficient β to output an output signal of the temporal gain output section. And a (n + 3) th multiplier for outputting as.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments with reference to the accompanying drawings. In the embodiment of the present invention, as shown in FIG.
The direction that coincides with the direction of the scanning line on the display screen of the television image is the reference direction (0 ° line direction), and in addition to this, 3
A description will be given of the case where the line directions (6 directions) of 0 °, 60 °, 90 °, 120 °, and 150 ° are set. However, this can be controlled in more directions by increasing the scale of the hardware.

FIG. 2 is a block diagram showing an embodiment in which the image orientation adaptive temporal processing apparatus of the present invention is applied to a MUSE decoder of a high-definition receiver. In FIG. 2, reference numeral 1 is an integrated low-pass filter unit (hereinafter referred to as integrated LPF unit), and 2 is a temporal processing unit. Here, the integrated LPF unit 1 is a two-dimensional LPF.
(Shown by reference numeral 3), a one-dimensional or two-dimensional LPF for each line direction (shown by reference numerals 4-1, -----, 4-6) and an integration processing unit 5. The temporal processing section 2 is composed of a variable gain control section 6, an adder 7, a delay circuit 8 such as a frame memory, a subtractor 9 and a temporal gain output section 10.

As a component not included in the integrated LPF unit 1 and the temporal processing unit 2, a subtractor 11 forming an integrated high pass filter unit (hereinafter referred to as an integrated HPF unit) and an integrated LPF unit 1 are also provided. And temporal processing unit 2
There is an adder 12 for adding the respective outputs of the above to generate an output signal of the temporal processing apparatus of the present invention.

Next, the operation will be described. As an input signal of the device (a signal input to the integrated LPF unit 1 and the subtractor 11), a luminance signal obtained by mixing a moving image processed signal and a still image processed signal by the MUSE decoder according to motion information is used as the input signal. To do. In the image directionality adaptive temporal processing device of the present invention, unlike the conventional temporal processing device, a two-dimensional low pass filter (two-dimensional LPF) process is performed on an input signal (performed by the two-dimensional LPF3 in FIG. 2). In addition to the above, low-pass filter processing (performed by each line direction LPF from 0 ° to 150 ° in FIG. 2) along a plurality of target specific directions is performed in parallel. Although FIG. 2 includes the line directions LPFs of six angles having different specific direction dependences, if the necessary directions are limited, it is possible to use one line direction LPF. .

Two-dimensional LPF arranged in integrated LPF unit 1
The frequency characteristics of each line LPF from 3 to 150 ° line LPF4-6 are shown in FIGS. 3 (a) to 3 (g), respectively. Here, the horizontal axis is the horizontal frequency and the vertical axis is the vertical frequency. As a result, the output of each line LPF becomes a directional image. For example, in the output of the 0 ° line LPF4-1 in FIG. 2, only horizontal lines parallel to the scanning direction in the image are not blurred,
The line in the other direction becomes a blurry image (that is, an image in which only the image having the directionality of the 0 ° line is not blurred). Similarly, the output of the 30 ° line LPF4-2 and the 60 ° line LPF4-
3 output, 90 ° line LPF4-4 output, 120 ° line L
The output of the PF4-5 and the output of the 150 ° line LPF4-6 are images in which only the images having the respective directivities are not blurred. Further, the output of the two-dimensional LPF 3 has no special directionality, and thus becomes an image that has been subjected to low-pass processing independent of direction.

Each filter processing output (two-dimensional LP
The filter processing outputs from F3 to 150 ° LPF4-6) are added by the integration processing unit 5 with weighting according to the directionality information of each image. When this process is expressed in an equation,
It becomes like the following formula.

[Equation 1] Here, G ₁ is the output of the integration processing unit 5, F _2d is the two-dimensional filter output, F ₀ is the 0 ° line filter output, and F ₁ is
30 ° line filter output, F ₂ is 60 ° line filter output, F ₃ is 90 ° line filter output, F ₄ is 120 °
Line filter output, F ₅ is 150 ° line filter output, a
Is a weighting factor corresponding to the two-dimensional filter, b ₀ is 0 °
A weight coefficient corresponding to the direction, b ₁ a weight coefficient corresponding to the 30 ° direction, b ₂ a weight coefficient corresponding to the 60 ° direction,
b ₃ is a weighting factor corresponding to the 90 ° direction, b ₄ is 12
The weighting coefficient corresponding to the 0 ° direction and b ₅ are the weighting coefficients corresponding to the 150 ° direction, and the processing result, that is, G ₁ is output from the integrated LPF unit 1 (see FIG. 2).

In equation (1), the weighting factors b _{0 to} b
₅ relates to the invention of the present inventors, and is controlled based on the image direction information described in the specification of Japanese Patent Application No. 8-129570 “Image Direction Detection Device” filed on the same date as the present application. It The image orientation information includes the orientation of the portion to be processed (in the embodiment of FIG. 2, 0 °, 30 °, 6
6 directions of 0 °, 90 °, 120 °, and 150 °), and intensity information in that direction are included. The value of the intensity corresponding to the respective directions of the directional information, now, 0 ° for the direction d _0, 30 ° for the direction d _1, 60 ° for the direction d _2, 90 ° for the direction d _3, 120
The direction of ° is indicated by d ₄ , and the direction of 150 is indicated by d ₅ . D _i (i = 0, 1,
The levels 2, 3, 4, 5) indicate the strength in each direction.

Here, the intensity corresponding to the direction indicates the probability that the image has the directivity at the pixel position to be processed, and the higher the intensity, the higher the probability of having the corresponding directivity. I can say. If the d _i corresponding to each direction is used, the above weighting coefficient is as follows.

[Equation 2] Here, d _max (if assigned two bits d _i, d _max is 3.) Maximum level of d _i also

(Equation 3)

The result of such processing is that the integrated LPF 1 is provided if the directional information matches the pattern of the actual image.
The vertical lines, horizontal lines and diagonal lines are all reproduced neatly, and the output of is an image in which interference signals having a component different from the original direction generated on or near the lines are reduced.

FIG. 4 shows the above mathematical expressions (1) to (3).
An example of a circuit configuration in the case where the integrated LPF unit 1 is configured by actual hardware to realize the expression is shown. In FIG. 4, the 0 ° line LPF4-1 is a 7-tap 1 in the horizontal direction.
The 90-degree line LPF4-4 is set to 7 in the vertical direction.
This is realized by using each one-dimensional filter of the line. Also, two-dimensional LPF3, 30 ° line LPF4-2, 6
0 ° line LPF4-3, 120 ° line LPF4-5 and 1
The 50 ° line LPF4-6 uses a two-dimensional filter of 7 lines × 7 taps, and realizes the filter having the characteristics shown in FIG. 3 by changing the setting of each coefficient.

Next, the integrated processing section 5 causes the LPFs 3 and 4 to operate.
Outputs of -1,4-2, ---, 4-6 (F _2d , F ₀ , F _1, -
-, F ₅ ) are multiplied by weighting factors a, b ₀ , b ₁ , ---, b ₅ , respectively, and the multiplication results are added. That is, the maximum value selection circuit 13 and the sum calculation circuit 14 to which the image direction information d ₀ , d ₁ , ---, d ₅ are supplied together so that the weighting coefficient a is calculated by the above equation (2). The respective output signals of are supplied to the first coefficient calculation circuit 15-1.

Further, in order that the weighting factors b ₀ , b ₁ , ---, b ₅ are calculated by the above equation (3), the output signals of the maximum value selection circuit 13 and the summation calculation circuit 14 are respectively output. In addition, the image direction information d ₀ , d ₁ , ---, d ₅ are supplied to the coefficient calculation circuits 15-2, ---, 15-7, respectively.

The weighting factors a, b ₀ , b ₁ ,
---, b ₅ are multipliers 16-1, respectively, as shown in the figure.
16-2, ---, 16-7, the output signal F of each LPF
_2d, F ₀ , ---, F ₅ are multiplied, and the sum of the multiplication results is taken in the adder 17. The output signal (low-frequency signal) of the adder 17 is the output signal (low-frequency signal G ₁ ) of the integrated LPF unit 1 (see FIG. 2) that constitutes the temporal processing device of the present invention.

The integrated low frequency signal G ₁ is subtracted from the input signal in the subtractor 11 to extract the high frequency signal F. The integrated low frequency signal is an image signal having many interference signals, and the high frequency signal is an image signal having many interference signals. Then, the extracted high frequency signal F is subjected to temporal processing in the temporal processing unit 2 shown in FIG.

The processing in the temporal processing section 2 will be described below. The high-frequency signal F has a variable gain control unit 6 according to the strength indicating the certainty of the directional information of the image.
(See FIG. 2), a non-linear process for changing the gain coefficient is performed. It becomes like this.

G ₂ = α (m) · F (4) where G ₂ is an output, F is an input, α (m) is a gain coefficient (0 ≦ α ≦ 1), and m is directional information. Is the maximum value of the intensity of and is expressed by the following equation.

M = max (d _i ) (i = 0, 1, 2, 3, 4, 5) (5) where d _i is the directional information

For α (m), for example, the gain coefficient approaches 0 when the maximum value m of the directional information intensity is large, and the gain coefficient is 1 when the maximum value m of the directional information intensity is small.
Is a function that approaches. By this processing, the gain coefficient is reduced in a portion where the maximum value m of the direction information intensity is large, whereby the high frequency signal including a lot of interference is attenuated. FIG. 5 shows the maximum value m of the strength of the directional information of the gain coefficient α (m) when the strength of the directional information is 2 bits.
Shows an example of the relationship with.

In order to realize this relationship (the relationship shown in FIG. 5), the variable gain control section 6 shown in FIG. 2 uses the directional information d ₀ , d ₁ , ---, d as shown in FIG. _The maximum value selection circuit 18 for selecting the maximum value of ₅ , the output of which is supplied to the gain coefficient α
The coefficient control circuit 19 for calculating (m) and the output signal F of the subtracter 11 (which constitutes the integrated HPF) are multiplied by the gain coefficient α (m) obtained by the calculation circuit 19 to perform gain control. Multiplier 20 for obtaining the output signal G ₂
Has been arranged.

Further, in FIG. 2, the output signal G ₂ of the variable gain control unit 6 is branched into two systems, one system is used to obtain an output signal and the difference signal of the frame memory 8, the other one system It is used for addition with the output signal of the temporal gain output unit 10. The output signal of the temporal gain output unit 10 and the addition output signal of the signal G ₂ are the same as the frame memory 8 and the adder 1.
Guided to 2. In the frame memory 8, the signal is motion-corrected using motion vector information (not shown) and is delayed by one frame period. The signal G ₂ is subtracted from the output signal of the frame memory 8 in the subtracter 9, and the result obtained by multiplying the subtraction result by the gain coefficient β (m) (0 ≦ β ≦ 1) in the temporal gain output unit 10 is obtained. The signal G ₂ is added in the adder 7, and the temporal processing unit 2
Output signal G _{3 of} the temporal processing unit 2 and the output signal G ₁ of the integrated LPF unit are added to the adder 12
In the image direction adaptive type temporal processing device of the present invention, and becomes the final output signal.

The gain coefficient β (m) has a non-linear characteristic in which the gain changes according to the maximum value m of the directional information intensity. For example, FIG. 7 shows an example of how the gain coefficient β (m) changes with respect to the maximum value m of the intensity of 2-bit directional information. Further, such a gain coefficient β (m) (0
FIG. 8 shows the configuration of the temporal gain output unit 10 for obtaining an output signal by multiplying the output signal of the subtractor 9 by ≦ β ≦ 1). In FIG. 8, 21 is a maximum value selection circuit, 22 is a coefficient calculation circuit, and 23 is a multiplier.

The operation of the temporal processing section 2 described above can be expressed mathematically as follows.

## EQU6 ## G ₃ = (1-β (m)) G ₂ / (1-β (m) f ^-1 ) (6) where f ^-1 is one frame delay and G ₃ is , Represents the output signal of the temporal processing unit. Since the maximum value m of the directional information intensity represents the likelihood that the image has directionality, when the maximum value m of the directional information intensity is large, the information contained in the image signal is almost integrated. The high frequency signal F, which is supplied to the range signal G ₁ and is supplied to the temporal processing unit, is a signal containing a large amount of interfering signals. Therefore, by controlling the high frequency signal F according to the strength of the directional information, it is possible to remove only the interfering signal.

FIG. 9 schematically shows how an image of a horizontal line including a large number of aliasing disturbances is affected by the present invention. As shown in FIG. 9, a clean horizontal line image is obtained on the output side of the integrated LPF unit 1 (see FIG. 2), and the high frequency signal which is the output signal of the integrated HPF (subtractor 11) is finely divided vertically. Only the folded components appear. This high frequency signal is attenuated by the temporal processing unit 2 (see FIG. 2), and the final output signal is an image in which the folding of vertical lines is reduced.

[0034]

EFFECTS OF THE INVENTION By using the present invention, it is possible to eliminate interference signals such as aliasing and noise even for a pattern having directionality on a two-dimensional plane without losing the original information of the image signal. To enable. Further, the device of the present invention is not limited to the high-definition image receiver described as one embodiment of the present invention, but can be applied to receivers of other systems.

[Brief description of drawings]

FIG. 1 shows the orientation of an image.

FIG. 2 shows the device of the present invention in the MUSE of a high-definition receiver.
An embodiment when applied to a decoder is shown in a block diagram.

FIG. 3 shows a two-dimensional frequency characteristic of each LPF used in the device of the present invention.

FIG. 4 shows a circuit configuration example when the integrated LPF is configured by actual hardware.

FIG. 5 shows an example of the relationship between the gain coefficient α (m) of the variable gain control section and the maximum value m of the directional information intensity.

FIG. 6 shows a configuration of a variable gain control section.

FIG. 7 shows an example of how the gain coefficient β (m) of the temporal gain output unit changes with respect to the maximum value m of the directional information intensity.

FIG. 8 shows a configuration of a temporal gain output unit.

FIG. 9 schematically illustrates how a horizontal line image including folding interference undergoes changes according to the present invention.

[Explanation of symbols]

 1 integrated low-pass filter (LPF) unit 2 temporal processing unit 3 two-dimensional LPF 4-1, ---, 4-6 one-dimensional or two-dimensional LPF 5 integrated processing unit 6 variable gain control unit 7 adder 8 frame memory 9 Subtractor 10 Temporal gain output section 11 Subtractor (integrated high-pass filter) 12 Adder 13 Maximum value selection circuit 14 Sum calculation circuit 15-1, 15 -2, ---, 15-7 Coefficient calculation circuit 16- 1,16-2, ---, 16-7 Multiplier 17 Adder 18,21 Maximum value selection circuit 19,22 Coefficient operation circuit 20,23 Multiplier

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Habunobu Mizutani 1-10-11 Kinuta, Setagaya-ku, Tokyo Inside the Japan Broadcasting Corporation Broadcasting Technology Laboratory

Claims (8)

[Claims] 1. An integrated low-pass filter unit including at least one filter having a specific direction dependency in a two-dimensional frequency characteristic, and an integrated high-pass filter unit having a specific direction dependency in a two-dimensional frequency characteristic. A temporal processing unit that performs a temporal filter process on the output signal of the integrated high-pass filter unit based on image directionality information input from the outside to output a signal in which a high-frequency component is adaptively attenuated; A first adder for adding the output signal of the integrated low-pass filter unit to the output signal of the temporal processing unit and outputting the obtained added output signal as an output signal of the image directionality adaptive temporal processing device; An image orientation adaptive temporal processing device characterized by including. 2. The image directionality adaptive temporal processing apparatus according to claim 1, wherein the integrated low-pass filter unit has a two-dimensional frequency characteristic that is line-symmetric in vertical and horizontal directions about an origin. A two-dimensional low-pass filter that does not have a specific direction dependency in its characteristics, at least one low-pass filter that has a specific direction dependency in its two-dimensional frequency characteristics, and a specific direction dependency Integrated processing for weighted addition processing of the output signal of the two-dimensional low-pass filter and the output signal of at least one low-pass filter having the specific direction dependence, and output based on the image direction information An image directionality adaptive temporal processing device, which includes: 3. The image directionality adaptive temporal processing apparatus according to claim 2, wherein the image directionality information of a low-pass filter having the specific direction dependency included in the integrated low-pass filter unit. A maximum value selection circuit for selecting and outputting a maximum level signal from the first to nth level signals, which is the first to nth level signals for each specific direction. , A sum calculation circuit for calculating and outputting the sum of the first to nth level signals, and a gain coefficient a (0 ≦ a based on each output signal of the maximum value selection circuit and the sum calculation circuit).
A first coefficient calculation circuit that calculates and outputs ≦ 1), based on each output signal of the maximum value selection circuit, the sum calculation circuit, and the (i + 1) (0 ≦ i ≦ n−1) level signal The second to (n + 1) th coefficient operation circuits for calculating and outputting gain coefficients b _i (0 ≦ b _i ≦ 1), and outputs of the two-dimensional low-pass filter having no specific direction dependence. A first multiplier for multiplying a signal by the gain coefficient a; and a first multiplier of the first to nth low-pass filters having the specific direction dependence and different from each other in the specific direction dependence. The output signals of the (i + 1) th low-pass filter are multiplied by gain coefficients b _i and the output signals of the first to (n + 1) th multipliers, respectively. And a second adder for outputting Directional adaptive temporal processing unit. 4. The image direction adaptive temporal processing apparatus according to claim 3, wherein the integrated low pass filter unit includes six low pass filters having the specific direction dependence, and an image signal on a display is displayed. The scanning direction of 0 ° is 0 °, the specific direction dependence of each low pass filter is 0 °, 30 °, 60 °, 90 °, 120 ° and 1 °.
An image directionality adaptive temporal processing device characterized by being 50 °. 5. The image direction adaptive type temporal processing device according to claim 1, wherein the integrated high-pass filter section receives an output of the integrated low-pass filter section from an input signal of the integrated low-pass filter section. An image directionality adaptive temporal processing device comprising a first subtractor for subtracting a signal. 6. The image orientation adaptive temporal processing apparatus according to claim 1, wherein the temporal processing unit multiplies an input signal of the temporal processing unit by α times (0 ≦ α ≦ 1) based on the image orientation information. ), And an output signal of the variable gain control unit is branched into two, one of which is supplied as an addition or addition signal, and the output signal is output as an output signal of the temporal processing unit. A third adder, a delay circuit to which the output signal of the third adder is input, a second subtractor that subtracts the other of the two branched signals from the output signal of the delay circuit, and outputs the subtracted signal A temporal gain output unit for multiplying the output signal of the second subtractor by β times (0 ≦ β ≦ 1) based on the image directionality information and supplying it to the third adder as the augend or addition signal, respectively. Consisting of Orientation of the adaptive-temporal processing apparatus characterized. 7. The image directionality adaptive temporal processing apparatus according to claim 6, wherein the image directionality information of a low-pass filter having the specific direction dependency included in the integrated low-pass filter unit. A level signal for each specific direction, wherein the variable gain control unit selects a maximum level signal from the level signals for each specific direction and outputs the selected maximum value selection circuit; Based on the output signal, the gain coefficient α (0
≦ α ≦ 1) and a coefficient calculation circuit for calculating and outputting, and a (n + 2) th output circuit that multiplies the input signal of the variable gain control section by the gain coefficient α and outputs the output signal as the output signal of the variable gain control section. ). An image directionality adaptive temporal processor. 8. The image directionality adaptive temporal processing device according to claim 6, wherein the image directionality information of a low-pass filter having the specific direction dependency included in the integrated low-pass filter unit. A level signal for each specific direction, wherein the temporal gain output unit selects a maximum level signal from the level signals for each specific direction and outputs the maximum value selection circuit; and an output of the maximum selection circuit. Gain coefficient β (0 ≦
a coefficient calculation circuit for calculating and outputting β ≦ 1), and the gain coefficient β for the input signal of the temporal gain output unit.
And an (n + 3) th multiplier for outputting the output signal as the output signal of the temporal gain output unit.