JP3345980B2 - Frame image generation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is, interlace - the scan moving picture signal frame - for arm Table Shimesuru, even-Fi - about frame picture image generation device constituting the frame image from the field - field and odd Fi Things.

[0002]

2. Description of the Related Art In a conventional frame image generating apparatus,
An example of statically displaying a frame image will be described. One frame of a moving image signal interlaced (interlaced scanning) is composed of two different time elements. Therefore, 1
When the frame is displayed as it is (frame display),
Two different screens will be displayed simultaneously in the same frame, and will not be a still image. For example, a moving rectangular figure is displayed shifted in the horizontal direction as shown in FIG. Therefore, the conventional frame - in beam image image generating device, one of the Fi - by field interpolation the field, frame - constitute a beam image.

Conventional frame - a block diagram of a beam image image generation apparatus shown in FIG. In the figure, 1 is an input image signal, 2 is a memory, 3 is an image signal as a memory output, 4 is an inter-field interpolator for performing vertical pixel interpolation, 5 is an interpolated image signal generated by the intra-field interpolator 4, Reference numeral 6 denotes a changeover switch, 7 denotes a generated frame image signal, and 8 denotes a field changeover signal representing an odd / even number of fields.

A conventional frame constructed as described above .
A description will be given of the operation of the images generating device. In this specification, the first half field constituting one frame is called an even field, and the second half field is called an odd field.

[0005] Image signal 1 consisting of pixels in even fields
Are stored in the memory 2, and the image signal 3 of a predetermined even field is repeatedly output. The intra-field interpolator 4 interpolates the image signal 3 in the field of 1/2 pixel in the vertical direction, and outputs the interpolated image signal 5. That is, the pixel represented by the white circle is generated by interpolation from the real pixels (image signal 3) of the even field represented by the black circle in FIG. 7, and the pixel value of the white circle is output as the interpolated image signal 5. Which of the black circled pixels and the white circled pixels is output as the frame image signal 7 is determined by an externally supplied field switching signal 8 according to a command from the switch 6. That is, the image signal 3 is output in the even field, and the interpolated image signal 5 is output in the odd field.
, So that the frame image signal 7 can be composed of only pixels of the same even field.
In this manner, since the frame image signal 7 is composed of only pixels at the same time, a completely still image can be displayed instead of an image in which two screens are synthesized as shown in FIG. . This image is referred to as a field image.

[0006]

However [0005] In the frame picture image generation device having a configuration as described above, because it produces a pixel of one frame from one field of pixel, the vertical resolution same as the one field resolution, That is, it is １ ／ of the vertical resolution of one frame. The deterioration of the vertical resolution becomes visually remarkable in the case of an image signal having a small motion such as a quasi-still image.

[0007] The present invention has been made in view of the above problems, frame image
Providing two screens without being synthesized and feel <br/> le de image frame picture image generation device that can display images having improved vertical resolution than as an image Aim.

[0008]

In order to solve the above problems BRIEF SUMMARY OF THE INVENTION, frame picture image generation device of the present invention, the M field and the N (where, N = M-1 or N = M + 1,) field in configured interlace - a frame picture image generation device for scan image signal to generate a frame picture image as an input signal output, and the block a set of pixels constructed by dividing the field horizontally and vertically define, generate and intra-field interpolation pixel value of the position half the movement of the first N fields field vertical <br/> straight pixel intervals in the vertical direction from the pixel position of the block in the intra-field interpolation of the first N fields An intra-field interpolation means for outputting as a signal, a pixel value of the Nth field and
Fi - to detect the motion vector is a motion of each block by comparing the pixel values of the field, and the motion vector detecting means for outputting a block error signal is the magnitude of the motion vector and the motion compensation error, before Symbol each The M-th motion vector indicated by the motion vector corresponding to a pixel at a position shifted by の of the field vertical pixel interval in the vertical direction from the pixel position of the block
Inter-field interpolation means for outputting a pixel of a field as an inter-field prediction signal; vertical motion determination means for determining whether or not a vertical motion component of the motion vector is an odd multiple of 1/2 of a field vertical pixel interval; If the vertical motion is determined to be an odd multiple of 1/2 for each block and the magnitude of the block error signal is less than a predetermined value, the inter-field prediction signal is output; otherwise, the intra-field interpolation is performed. A first selection unit that outputs a signal as an Nth modified field signal; and a second selection unit that switches and outputs the Nth field signal and the Nth modified field signal at a field cycle. .

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention With the above configuration, it is possible up to twice the vertical resolution of the field image is obtained. Hereinafter, the operation will be described.

First, the invention according to claim 1 will be described. In the intra-field interpolation means, the intra-field interpolation means calculates the pixel value of the N-th field at a position shifted by の of the field vertical pixel interval, which is the interlace offset value, from the pixel position of each block. Generate and output as an intra-field interpolation signal. FIG. 8 is a diagram showing a positional relationship between pixels in the Mth field and the Nth field. In the figure, black circles represent real pixels in the Nth field, white circles represent real pixels in the Mth field, and pixels to be generated are represented by squares. In order to display the N-th field in a frame, pixels C and pixels E are required, and these square pixels are generated by interpolation by the intra-field pixel interpolation means. The motion vector detecting means compares the pixel in the Nth field and the pixel in the Mth field in block units, outputs a relative position where the difference is minimized as a motion vector, and outputs the magnitude of the difference as a block error signal. Output as In FIG. 8, triangles indicate vertical interpolation pixels of the M-th field, and arrows indicate motion vectors. The inter-field interpolation means indicates the pixel at the interpolation pixel position in the N-th field by the M-th motion vector .
The prediction is performed from the pixels in the field, and the prediction value is output as an inter-field prediction signal. That is, the pixel values of the pixels A ′ and C ′ are used as the predicted values of the pixels C and E for the motion vectors indicated by the arrows in FIG. The vertical motion amount calculating means determines whether or not the vertical motion amount of the motion vector is an odd multiple of 1/2 the field pixel interval. If it is not an odd multiple of 1/2, the pixel value used for prediction by the inter-field interpolation means becomes a pixel value interpolated and generated by vertical interpolation of the M-th field. The resolution is the same. Further, a large magnitude of the block error signal indicates that the prediction accuracy of the pixel value of the inter-field interpolation means is poor. Therefore, by switching the first selecting means so as to output the intra-field interpolation signal when either of these two conditions is satisfied, and to output the inter-field prediction signal having a high vertical resolution otherwise. The image quality of the interpolation pixel in the N-th field can be improved. Therefore, if the image signals of both fields constituting the N field signals and the frame N-th corrected field signals in the second selection means, it is possible to realize a frame image in which the vertical resolution stationary high and.

According to the invention of claim 2, the input signal is a motion between the Nth field and the Mth field in block units .
This is a case where encoding is performed using a motion vector .
Therefore, a motion vector can be generated by decoding the input signal by the motion information decoding means. Further, by decoding the input image signal by the pixel decoding means, an interlaced image signal and a block error signal of the Mth and Nth fields corresponding to the input signal of the first invention can be generated. . From the above description of the operation, it is clear that the operation of the motion vector detecting means of the first invention can be realized by the motion information decoding means and the pixel decoding means. Other means are the same as the respective means of the first invention. Therefore, the Nth field and the Mth
The same effects as those of the first invention can be obtained for an input signal encoded using a motion vector that is a motion between fields .

[0012] claimed invention of claim 3 and claim 4, frame aspect of the invention or the second aspect of claim 1, wherein
Adding the difference motion amount calculating means images generator is obtained by adding the difference motion amount condition for switching whether to output either inter-field predictive signal and field interpolation signal in the first selection means. According to the first or second aspect of the present invention, an inter-field prediction signal may be output even when a motion vector is greatly different between adjacent blocks. If a part of a graphic is motion-compensated with a different motion vector, a large image quality is obtained. Deterioration occurs. For example, FIG. 9A shows an example in which the parallelogram moves in the horizontal direction. A block including most of the parallelogram is stopped by the inter-field prediction signal, but a part of the parallelogram of the adjacent block is used. Does not stand still as shown in FIG. Accordingly, claims 3 and 4
In the described invention, the above-mentioned problem is solved by outputting the intra-field interpolation signal by the first selecting means when the motion vector is greatly different between adjacent blocks (when the difference motion amount is large).

[0013] The invention of claim 5 and claim 6, wherein adds a small block error calculation means frame picture image generation device of the invention of claim 1 or claim 2, wherein, between the fields in the first selection means A small block error signal is added to the condition for switching which of the prediction signal and the intra-field interpolation signal is output. According to the first and second aspects of the present invention, an inter-field prediction signal motion-compensated with a motion vector of a large graphic in a block may be output even when a small graphic having a different motion exists in the block. If the small figure of the figure does not stand still, a large deterioration in image quality occurs. For example, FIG. 10A shows an example in which a stationary small square exists at the upper right of a moving parallelogram. In the case of switching between the inter-field prediction signal and the intra-field interpolation signal in block units, when the inter-field prediction signal is selected, the parallelogram stops as shown in FIG. 10B, but the small square does not stop. Therefore, the block is divided into two parts vertically and horizontally to form a small block, and a small block error calculating means calculates a small block error signal for each small block. As a result, the small block error signal of the upper right block in FIG. 10B is large, and the small block error signals of the other small blocks are small. Therefore, the above-mentioned problem is solved by outputting an intra-field interpolation signal by the first selecting means for a small block having a large small block error signal.

[0014]

EXAMPLES Hereinafter, an embodiment of a frame picture image generation device of the present invention will be described with reference to the drawings.

[0015] Figure 1 is a block diagram of a first embodiment of a frame picture image generation device of the present invention. In the figure,
1 is an input image signal, 2 and 10 are memories, 3 and 11 are image signals which are memory outputs, 4 is an inter-field interpolator for performing vertical pixel interpolation, 5 is an interpolated image signal generated by the intra-field interpolator 4, 12 is a motion vector detector for detecting a motion vector, 13 is a motion vector, 14 is a block error signal, and 15 is a vertical motion component of the motion vector 13.
A vertical motion determiner 16 for determining whether or not it is an odd multiple of 1/2 of the field vertical pixel interval, and 16 is a vertical motion determiner 15
, 17 is an inter-field interpolator for performing inter-field pixel interpolation, 18 is an address signal indicating the position of a reference pixel for inter-field prediction, 19 is a reference pixel signal, and 20 is an inter-field interpolator 17 , 21 is a selector, 22 is an output of the selector 21, 23 is a selector, 24 is a generated frame image signal, and 8 is a field switching signal indicating odd / even number of fields.

The operation of the embodiment configured as described above will be described below. Pixels in odd fields are stored in the memory 2, and image signals 3 in predetermined odd fields are repeatedly output. The intra-field interpolator 4 outputs the image signal 3
Is vertically interpolated within a field of 1/2 pixel, and is output as an interpolated image signal 5. On the other hand, the pixels of the even field are accumulated in the memory 10, and the image signal 11 of the predetermined even field is repeatedly output. The motion vector detector 12 compares the image signal 3 and the image signal 11 in units of blocks while shifting the pixel positions by several pixels, and outputs a relative position where the difference between the two is minimized as a motion vector 13.
The difference at that time is output as a block error signal 14. Note that the motion vector detection accuracy in the vertical direction is at least の of the field vertical pixel interval.

In the vertical motion determiner 15, the motion vector 1
3 is 1 / the field vertical pixel interval.
It is determined whether or not it is an odd multiple of 2, and a determination result 16 is output. The inter-field interpolator 17 generates an address signal 18 indicating the pixel position of the even field corresponding to the motion obtained by adding the motion vector 13 and the motion of the vertical 画素 pixel due to the interlace. The reference pixel 19 to be output is output as an interpolated image signal 20. That is, the interpolated image signal 20 calculates the pixel value of each pixel position in the even field at the time of the odd field,
This is a pixel value predicted from the pixel value of the even field. The selector 21 compares the block error signal 14 with a predetermined value,
If the value is equal to or larger than the predetermined value, the interpolation image signal 5 is used as the selector output 22. When the block error signal 14 is smaller than the predetermined value, if the determination result 16 is an odd multiple of 1/2 of the pixel interval, the interpolation image signal 20 is set to the selector output 22. If there is, the interpolation image signal 5 is used as the selector output 22. The selector 23 outputs the image signal 3 as the frame image signal 24 when the switching signal 8 indicates an odd field,
If the switching signal 8 indicates an even field, the selector output 2
2 is output as a frame image signal 24.

As described above, according to the present embodiment, the intra-field interpolator 4, the motion vector detector 12, the vertical motion determiner 15, the inter-field interpolator 17, the selector 21 and the selector 23 are provided. with both field image signals composing the N-th field signal (odd field signal) and the frame N-th modification field signal selector 23, that is vertical resolution high to achieve a frame image stationary and it can.

[0019] FIG. 2 is a block diagram of the second embodiment of the frame picture image generation device of the present invention. In the figure,
30 is an input image signal, 31 is a motion information decoder, 13 is a motion vector, 32 is a pixel decoder, 33 is an image signal decoded by the pixel decoder 32, 14 is a block error signal, 2, 10 Is a memory, 3 is an image signal output from the memory 2, 4 is an intra-field interpolator for performing vertical pixel interpolation, 5
Are the interpolated image signals generated by the intra-field interpolator 4, 1
5 the vertical movement component of the motion vector 13 Feel
Determining vertical motion determiner whether an odd multiple of 1/2 of the de vertical pixel spacing, 16 signal representing the determination result of the vertical motion determinator 15, 17 inter-field interpolator that performs inter-field pixel interpolation , 18 are address signals indicating the positions of reference pixels for inter-field prediction, 19 is a reference pixel signal, 20 is an interpolated image signal generated by the inter-field interpolator 17, 21 is a selector, 22 is a selector output, Reference numeral 23 denotes a selector, reference numeral 24 denotes a generated frame image signal, and reference numeral 8 denotes a field switching signal indicating an odd / even number of fields.

The operation of the embodiment configured as described above will be described below. The operations of the memory 2, the memory 10, the intra-field interpolator 4, the vertical motion determiner 15, the inter-field predictor 17, the selector 21, and the selector 23 are the same as those in the first embodiment, and therefore the description is omitted.

The input signal 30 is a signal encoded on a block basis. The odd field is motion-compensated and coded with reference to the even field, and its motion vector is coded simultaneously with the motion compensation error. Input signal 3
0 is decoded by the motion information decoder 31, and the motion vector 13 is output. The pixel decoder 32 receives the input signal 30
And the motion vector 13 to decode the image signal and output the image signal 33. The pixels of the odd field of the image signal 33 are recorded in the memory 2, and the pixels of the even field are recorded in the memory 10. Also, the pixel decoder 32
When decoding the input signal 30 in step (1), the residual signal of the motion compensation is calculated and output as a block error signal 14 which is a sum for each block. The subsequent operation is the same as in the above-described embodiment.

As described above, according to the present embodiment, by providing the motion vector detector 31 and the pixel decoder 32, the input signal 30 which has been motion-compensated and encoded is also the same as in the first embodiment. , it is possible to generate a high-resolution frame image image.

[0023] FIG. 3 is a block diagram of the third embodiment of the frame picture image generation device of the present invention. In the figure,
1 is an input image signal, 2 and 10 are memories, 3 and 11 are image signals which are memory outputs, 4 is an inter-field interpolator for performing vertical pixel interpolation, 5 is an interpolated image signal generated by the intra-field interpolator 4, 12 is a motion vector detector for detecting a motion vector, 13 is a motion vector, 14 is a block error signal, and 15 is a vertical motion component of the motion vector 13.
A vertical motion determiner 16 for determining whether or not it is an odd multiple of 1/2 of the field vertical pixel interval, and 16 is a vertical motion determiner 15
40, a difference motion amount calculator for calculating the motion amount of the motion vector difference; 41, a difference motion amount; 17, an inter-field interpolator for performing inter-field pixel interpolation; An address signal indicating the position of the reference pixel, 19 is a reference pixel signal, 20 is an interpolated image signal generated by the inter-field interpolator 17, 21 is a selector, 22 is an output of the selector 21, 23 is a selector, 24
Is a generated frame image signal, and 8 is a field switching signal indicating an odd / even number of fields.

The operation of the embodiment configured as described above will be described below. The operations of the memory 2, the memory 10, the intra-field interpolator 4, the motion vector detector 12, the vertical motion determiner 15, the inter-field predictor 17, and the selector 23 are the same as those in the first embodiment, and therefore the description is omitted. I do.

The difference motion amount calculator 40 calculates the motion vector 13
And calculates the difference motion amount 41 which is the magnitude of the difference between the motion vectors of adjacent blocks. Differential motion amount 4
When 1 is large, it indicates that the motion from the adjacent block is greatly different. In this case, if a part of the image included in the adjacent block is included in the block, significant image quality deterioration occurs. The selector 21 outputs the block error signal 14
Is compared with a predetermined value.
Is the selector output 22. Also, the block error signal 14
Is equal to or larger than a predetermined value, or the determination result 16 is の of the pixel interval.
If it is not an odd multiple of, the interpolation image signal 5 is output to the selector output 22.
And In cases other than the above, the relative motion amount 41 is further compared with a predetermined value. If the value is equal to or larger than the predetermined value, the interpolation image signal 5 is set to the selector output 22.
0 is the selector output 22.

As described above, according to the present embodiment, the difference motion amount calculator 40 calculates the difference motion amount 41, and switches between inter-field motion compensation and intra-field motion compensation according to the magnitude of the difference motion amount 41. Accordingly, it is possible to improve the frame Display quality of an image included in the plurality of blocks.

Although the embodiment using the difference motion amount calculator of this embodiment is an application of the configuration shown in FIG. 1, it can be similarly applied to the configuration shown in FIG. In this case, the input of the difference calculator may be connected to the output of the motion information decoder 31.

[0028] FIG. 4 is a block diagram of a fourth embodiment of the frame picture image generation device of the present invention. In the figure,
1 is an input image signal, 2 and 10 are memories, 3 and 11 are image signals which are memory outputs, 4 is an inter-field interpolator for performing vertical pixel interpolation, 5 is an interpolated image signal generated by the intra-field interpolator 4, 12 is a motion vector detector for detecting a motion vector, 13 is a motion vector, 14 is a block error signal, and 15 is a vertical motion component of the motion vector 13.
A vertical motion determiner for determining whether or not an odd multiple of 1/2 the field vertical pixel interval; 16 a signal indicating the determination result of the vertical motion determiner; 50 a small block for calculating an error in small block units An error calculator, 51 is a small block error signal, 17 is an inter-field interpolator for inter-field pixel interpolation, 18 is an address signal indicating the position of a reference pixel for inter-field prediction, 19 is a reference pixel signal, and 20 is a field signal. Interpolated image signal generated by the interpolator 17, 21
Is a selector, 22 is a selector output, 23 is a selector, 24 is a generated frame image signal, and 8 is a field switching signal indicating an odd / even number of fields.

The operation of the embodiment configured as described above will be described below. The operations of the memory 2, the memory 10, the intra-field interpolator 4, the motion vector detector 12, the vertical motion determiner 15, the inter-field predictor 17, and the selector 23 are the same as those in the first embodiment, and therefore the description is omitted. I do.

The small block error calculator 50 calculates the image signal 3
Is divided into small blocks smaller than the size of the input block, and compared with the pixel of the image signal 11 at the position indicated by the motion vector 13 in small block units, and the magnitude of the difference value of the small block is determined by the small block error. Output as a signal 51. When the small block error signal 51 is large, the motion of the small block is different from the motion of other small blocks included in the same block, and the image quality of the small block deteriorates unless intra-field interpolation is performed. . Therefore, the selector 21 compares the block error signal 14 with a predetermined value, and if it is equal to or more than the predetermined value, sets the interpolated image signal 5 as the selector output 22 of the block. Also, the block error signal 14
Is smaller than the predetermined value, the determination result 16 indicates that the pixel interval is 1
If it is not an odd multiple of / 2, the interpolation image signal 5 is used as the selector output 22 of the block. Further, the block error signal 1
If 4 is a predetermined value or more and the pixel interval is an odd multiple of 1/2,
The small block error signal 51 is compared with a predetermined value in small block units. If the error value is equal to or larger than the predetermined value, the interpolated image signal 5 is used as the selector output 22 of the small block. The block selector outputs 22.

As described above, according to this embodiment, the small block error signal 51 is calculated by the small block error calculator 50, and the inter-field motion compensation and the field by switching the internal motion compensation, it is possible to improve the frame Display quality of an image including small image motion different from the block.

The embodiment using the small block error calculator of this embodiment is an application example of the configuration shown in FIG.
In this case, the small block error calculator divides the image signal 3 into small blocks smaller than the size of the input block, and moves the image signal 3 in small block units. What is necessary is to compare with the pixel of the image signal (output of the memory 10) at the position indicated by the vector 13 and send the magnitude of the difference value of the small block to the first selector 21 as a small block error signal.

In this embodiment, the first half of the field constituting one frame is an even field.
The first half may be an odd field. Further, in the embodiment of the second invention, the motion information decoder 31 and the pixel decoder 32 may be shared with a decoding device for normal reproduction.

[0034]

As described in the foregoing, according to the frame image generating apparatus of the present invention, it is possible to produce a high-quality frame image of the moving image, and this technique can be used to improve image quality of slow reproduction Therefore, its practical effect is large.

[Brief description of the drawings]

Block diagram of a first embodiment of a frame picture image generation device of the present invention; FIG

Block diagram of a second embodiment of the frame picture image generation device of the present invention; FIG

Block diagram of a third embodiment of the frame picture image generation device of the present invention; FIG

Block diagram of the fourth embodiment of the frame picture image generation device of the present invention; FIG

5 is a diagram showing an example illustrated as frame table Videos

6 is a block diagram of a conventional frame image picture generator

FIG. 7 is an explanatory diagram of pixel positions in intra-field interpolation.

FIG. 8 is a diagram showing a relationship between pixel positions of an Mth field and an Nth field.

Figure 9 is an illustration of a frame <br/> over beam picture image may comprise an image of an adjacent block

Figure 10 is an illustration of a frame picture image if they contain small images of different motion block

[Explanation of symbols]

 2,10 memory 4 intra-field interpolator 12 motion vector detector 15 vertical motion determiner 17 inter-field interpolator 21,23 selector 30 motion information decoder 32 pixel decoder 40 difference motion amount calculator 50 small block error Calculator

Claims (6)

(57) [Claims] 1. An Mth field and an Nth field (where N = M
A frame image generating apparatus for generating and outputting a frame image using an interlaced image signal composed of (-1 or N = M + 1) fields as an input signal. A set is defined as a block, and a pixel value at a position shifted by a half of the field vertical pixel interval in the vertical direction from the pixel position of the block of the N-th field is generated by the intra-field interpolation of the N-th field to generate an intra-field interpolation signal. And an intra-field interpolation means for outputting a motion vector as a motion of each block by comparing a pixel value of the N-th field and a pixel value of the M-th field in each block. A motion vector detecting means for outputting a block error signal which is a magnitude of a vector and a motion compensation error; Inter-field interpolation means for outputting, as an inter-field prediction signal, a pixel of the M-th field indicated by the motion vector corresponding to a pixel at a position shifted by a half of a field vertical pixel interval in a vertical direction from a pixel position; Vertical motion determining means for determining whether or not the vertical motion component is an even multiple of 1/2 the field vertical pixel interval;
/ 2 even multiple and is determined and the size of the block error signal to output the inter-field predictive signal is less than a predetermined value, as the N modification field signal the field interpolation signal in other cases A frame image generating apparatus, comprising: a first selecting means for outputting; and a second selecting means for switching and outputting the N-th field signal and the N-th modified field signal at a field cycle. 2. An M-th field and an N-th field (where N = M
-1 or N = M + 1) The N-th field of the interlaced image signal composed of fields is encoded using a motion vector which is a motion between the N-th field and the M-th field in a block unit composed of a plurality of pixels. A frame image generating apparatus for generating and outputting a frame image of a decoded image using the input signal as an input signal, wherein the motion for decoding and outputting a motion vector of an encoded block of an Nth field of the input signal is output. Information decoding means for decoding pixels of the Mth field and the Nth field from the input image signal and the motion vector and outputting them as an Mth field signal and an Nth field signal; A pixel decoding means for outputting a signal, and a field perpendicularly extending from a pixel position of each of the encoded blocks. An intra-field pixel interpolating means for generating a pixel value at a position shifted by a half of a pixel interval from the N-th field signal by intra-field interpolation and outputting the same as an intra-field interpolation signal; An inter-field interpolation means for outputting, as an inter-field prediction signal, a pixel of the M-th field corresponding to a pixel at a position shifted by a half of a field vertical pixel interval in a vertical direction from a pixel position of each block of the field; Vertical motion component is 1 of field vertical pixel interval
Vertical motion determining means for determining whether or not the vertical motion is an even multiple of / 2, and for each block determining that the vertical motion is an even multiple of 1/2 and the magnitude of the block error signal is a predetermined value. If less than, outputs the inter-field prediction signal; otherwise, outputs the intra-field interpolation signal as an N-th modified field signal, first selecting means, and outputs the N-th field signal and the N-th modified signal. 2. A frame image generating apparatus, comprising: a second selecting means for switching and outputting a field signal in a field cycle. 3. An M-th field and an N-th field (where N = M
A frame image generating apparatus for generating and outputting a frame image using an interlaced image signal composed of (-1 or N = M + 1) fields as an input signal. A set is defined as a block, and a pixel value at a position shifted by a half of the field vertical pixel interval in the vertical direction from the pixel position of the block of the N-th field is generated by the intra-field interpolation of the N-th field to generate an intra-field interpolation signal. And an intra-field interpolation means for outputting a motion vector as a motion of each block by comparing a pixel value of the N-th field and a pixel value of the M-th field in each block. A motion vector detecting means for outputting a block error signal which is a magnitude of a vector and a motion compensation error; Inter-field interpolation means for outputting, as an inter-field prediction signal, a pixel of the M-th field indicated by the motion vector corresponding to a pixel at a position shifted by a half of a field vertical pixel interval in a vertical direction from a pixel position; Vertical motion determining means for determining whether or not the vertical motion component is an even multiple of 1/2 of the field vertical pixel interval; and determining the magnitude of the difference vector between the motion vector of an arbitrary block and the motion vector of an adjacent block. A differential motion amount calculating means for calculating and outputting as a differential motion amount;
And the differential motion amount is less than the predetermined value is the magnitude of an even multiple of the determined and the block error signal to output the inter-field predictive signal is less than the predetermined value of the intra-field interpolation in other cases A first selecting means for outputting a signal as a modified Nth field signal; and a second selecting means for switching and outputting the Nth field signal and the Nth modified field signal at a field cycle. Frame image generation device. 4. An M-th field and an N-th field (where N = M
-1 or N = M + 1) The N-th field of the interlaced image signal composed of fields is encoded using a motion vector which is a motion between the N-th field and the M-th field in a block unit composed of a plurality of pixels. A frame image generating apparatus for generating and outputting a frame image of a decoded image using the input signal as an input signal, wherein the motion for decoding and outputting a motion vector of an encoded block of an Nth field of the input signal is output. Information decoding means for decoding pixels of the Mth field and the Nth field from the input image signal and the motion vector and outputting them as an Mth field signal and an Nth field signal; A pixel decoding means for outputting a signal, and a field perpendicularly extending from a pixel position of each of the encoded blocks. An intra-field pixel interpolating means for generating a pixel value at a position shifted by a half of a pixel interval from the N-th field signal by intra-field interpolation and outputting the same as an intra-field interpolation signal; An inter-field interpolation means for outputting, as an inter-field prediction signal, a pixel of the M-th field corresponding to a pixel at a position shifted by a half of a field vertical pixel interval in a vertical direction from a pixel position of each block of the field; Vertical motion component is 1 of field vertical pixel interval
Vertical motion judging means for judging whether or not it is an even multiple of / 2, a difference for calculating the magnitude of a difference vector between a motion vector of an arbitrary block and a motion vector of a block adjacent thereto and outputting the result as a difference motion amount A motion amount calculating means, wherein if the vertical motion amount is determined to be an even multiple of １ ／ for each block, and the magnitude of the block error signal is less than a predetermined value and the differential motion amount is less than a predetermined value, the field First selecting means for outputting an inter prediction signal, and otherwise outputting the intra-field interpolation signal as a modified N-th field signal; and selecting the N-th field signal and the N-th modified field signal in a field cycle. 2. A frame image generating apparatus comprising: a second selecting unit for switching and outputting. 5. An M-th field and an N-th field (where N = M
A frame image generating apparatus for generating and outputting a frame image using an interlaced image signal composed of (-1 or N = M + 1) fields as an input signal. A set is defined as a block, and a pixel value at a position shifted by a half of the field vertical pixel interval in the vertical direction from the pixel position of the block of the N-th field is generated by the intra-field interpolation of the N-th field to generate an intra-field interpolation signal. And an intra-field interpolation means for outputting a motion vector as a motion of each block by comparing a pixel value of the N-th field and a pixel value of the M-th field in each block. A motion vector detecting means for outputting a block error signal which is a magnitude of a vector and a motion compensation error; Inter-field interpolation means for outputting, as an inter-field prediction signal, a pixel of the M-th field indicated by the motion vector corresponding to a pixel at a position shifted by a half of a field vertical pixel interval in a vertical direction from a pixel position; Vertical motion determining means for determining whether or not the vertical motion component is an even multiple of 1/2 of the field vertical pixel interval; and the Nth field of the input signal is composed of a plurality of small blocks smaller than the block. A small block error which outputs a small block error signal as a motion compensation error by motion-compensating the pixel value of the Nth field and the pixel value of the Mth field in each small block using the motion vector of the block. and calculating means, the magnitude of the vertical movement amount is determined to an even multiple of 1/2 and the block error signal for each block is less than a predetermined value Output the inter-field prediction signal, and output the inter-field prediction signal if the vertical motion amount is determined to be an even multiple of 1/2 and the magnitude of the small block error signal is less than a predetermined value; Otherwise, a first selecting means for outputting the intra-field interpolation signal as a modified N-th field signal, and a second selecting means for switching and outputting the N-th field signal and the N-th modified field signal at a field cycle. A frame image generation device comprising: a selection unit. 6. An M-th field and an N-th field (where N = M
-1 or N = M + 1) The N-th field of the interlaced image signal composed of fields is encoded using a motion vector which is a motion between the N-th field and the M-th field in a block unit composed of a plurality of pixels. A frame image generating apparatus for generating and outputting a frame image of a decoded image using the input signal as an input signal, wherein the motion for decoding and outputting a motion vector of an encoded block of an Nth field of the input signal is output. Information decoding means for decoding pixels of the Mth field and the Nth field from the input image signal and the motion vector and outputting them as an Mth field signal and an Nth field signal; A pixel decoding means for outputting a signal, and a field perpendicularly extending from a pixel position of each of the encoded blocks. An intra-field pixel interpolating means for generating a pixel value at a position shifted by a half of a pixel interval from the N-th field signal by intra-field interpolation and outputting the same as an intra-field interpolation signal; An inter-field interpolation means for outputting, as an inter-field prediction signal, a pixel of the M-th field corresponding to a pixel at a position shifted by a half of a field vertical pixel interval in a vertical direction from a pixel position of each block of the field; Vertical motion component is 1 of field vertical pixel interval
Vertical motion determining means for determining whether or not the number is an even multiple of / 2, and the Nth field of the input signal is composed of a plurality of small blocks smaller than the block. A small block error calculating means for performing motion compensation on the pixel value and the pixel value of the Mth field using the motion vector of the block and outputting a small block error signal as a motion compensation error; If the amount is determined to be an even multiple of 1/2 and the magnitude of the block error signal is less than a predetermined value, the inter-field prediction signal is output, and the vertical motion amount is determined to be an even multiple of 1/2; If the magnitude of the small block error signal is less than a predetermined value, the inter-field prediction signal is output. Otherwise, the intra-field interpolation signal is output as a modified N-th field signal. First selecting means and the frame image generating apparatus characterized by comprising a second selecting means for outputting the first N field signal and the second N modification field signal by switching a field period to.