JPH0823488A - Image reproduction device - Google Patents

Abstract

PURPOSE:To satisfactorily composite a high vision image and an NTSC image by storing the NTSC image in a picture storage means, and reading the NTSC image of odd and even fields from the storage means at the time of outputting the high vision signal of the odd and even fields. CONSTITUTION:The high vision still image is read form an HDTV image reproduction device 1, and a write address is obtained from a HDTV write address counter 4. Then, it is written into the odd field of an HDTV memory 3. The read field of a counter 5 is switched from the odd filed to the even field by a control signal from a microcomputer 10, and it is stored in the memory 3. On the other hand, an extended dynamic image is outputted from an NTSC dynamic image reproduction device 2, the write address is obtained from a counter 8 and it is written into an odd field memory 6. A system is switched from the memory 6 to an odd memory 7 by a control signal from the microcomputer 10. At the time of outputting the odd or even high vision signal, the NTSC signals of the odd or even field are read, and they are inputted to an image composer 12 so as to composite them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reproducing apparatus for synthesizing and displaying two images. In particular, a normal screen such as NTSC can be displayed in a high definition screen such as a high definition image.
The present invention relates to an image reproducing device for composite display. Specifically, image data stored mainly in museums and museums is recorded as a still image in high definition, and a moving image is recorded in the same manner, so that a portion requiring high definition during playback is displayed as a still image. In addition, the present invention relates to an image reproducing apparatus capable of displaying various changes by combining and displaying a moving image when the recording target is a moving object.

[0002]

2. Description of the Related Art Considering synthesizing an NTSC image on a high-definition screen, a high-definition image and an NTSC image are
As a system input, a method of switching and outputting these with a selection signal synchronized with a high-definition synchronization signal can be considered. However, with this method, the HDTV horizontal sync period is less than half that of the NTSC horizontal sync period.Therefore, when switching is performed in real time, the HDTV horizontal sync period is activated during the NTSC image processing. The period may end.

Therefore, if the NTSC moving image is temporarily stored in the image memory and is combined with the high-definition still image in the next field, as a result, the NTSC moving image is combined with the high-definition still image with a delay of one field. It becomes possible. However, in this case, there will be a discrepancy in the even / odd relationship of the fields between HDTV and NTSC.

That is, since the NTSC moving image is processed with a delay of 1 field, a shift of 1 field always occurs with respect to the high-definition image, and in a certain field scanning stage, the high-definition image is displayed as it is and the NTSC moving image is displayed. As the moving image, the image written one field before is displayed. Therefore, in the composited image displayed on the high-definition screen, the NTSC moving image is inverted in the odd field and the even field.

As shown in Japanese Examined Patent Publication No. 59-37913 (H04N5 / 44), in the partial image (child screen) within the screen, it is necessary to consider so that the interlace relationship becomes appropriate. I won't. In this conventional example, the reading of the sub-screen portion is
The interlace relation is made appropriate by selectively delaying by one horizontal scanning depending on the case.

[0006]

SUMMARY OF THE INVENTION The present invention is a synthetic method 2.
This provides an effective device when the two images have different field frequencies, such as a high-definition image and an NTSC image.

[0007]

DISCLOSURE OF THE INVENTION The present invention is an image reproducing apparatus for compositely displaying a first image and a second image having different field frequencies, the first image reproducing outputting the first image. Means (1), and second image reproducing means for decoding the field frequency of the second image as the first field frequency when decoding the compression-encoded second image
(2) and the image synthesis control means (3, 6, 7, 9, 1 for synthesizing the two images of the same field frequency at the same timing.
0, 12) and are provided.

Further, the present invention is an image reproducing device for reading out a high-definition image and a compressed moving image and synthesizing and displaying the same. The high-definition image reproducing means (1) for reproducing the high-definition image and a field frequency of 60.00 Hz. NTSC video playback means to set and decompress and play video that was originally NTSC video that was compressed by the interlace method
(2) and the NTSC image from the NTSC moving image playback means (2)
NTSC video image writing means to write to SC video image storage means (6, 7)
(8), an NTSC moving image reading means (9) for reading an NTSC moving image from the NTSC moving image storing means (6, 7), and the NTSC moving image storing means in relation to the timing of the high-definition image.
A control means (10) for reading an image from the (6, 7) using the NTSC moving image reading means (9) and the high-definition image read out based on a switching position control signal from the control means (10). And an image synthesizing means (12) for synthesizing the NTSC moving image.

Further, the present invention is an image reproducing apparatus for synthesizing and displaying two kinds of images, the first image reproducing means (1) for reproducing the first image and the second image reproducing for reproducing the second image. means
(2), image writing means (8) for writing the second image from the second image reproduction means (2) in the image storage means (6, 7), and control means
When the operation timing is controlled by (10), the odd field of the second image is read from the image storage means (6, 7) when the odd field of the first image is output, and the even field of the first image is output. Image reading means (9) for reading an even field of the second image from the image storage means (6, 7)
And an image synthesizing means (12) for synthesizing the read first image and second image based on the switching position control signal from the control means (10).

Further, the present invention is an image reproducing apparatus for reading out a high-definition image and a compressed moving image and synthesizing and displaying the same. The high-definition image reproducing means (1) for reproducing the high-definition image and a field frequency of 60.00 Hz. HDSC image from the NTSC video image reproduction means (2) that expands the video image that was originally set to NTSC video image compressed by the interlace method and reproduces the original image, and the high-definition video image reproduction means (1). A high-definition image writing means (4) that writes the NTSC image from the high-definition image writing means (4) and the NTSC moving image reproducing means (2) to the NTSC moving image storage means (6, 7). A moving image writing means (8), a high-definition image reading means (5) for reading a high-definition image from the high-definition image storage means (3), and an NTSC moving image from the NTSC moving-image storage means (6, 7). NTSC video to read The reading means (9) and the timing of reading an image from the NTSC moving image storage means (6, 7) using the NTSC moving image reading means (9) are the same as the high vision image reading from the high vision image storage means (3). Control means (1 field delayed compared to the timing of reading an image using the means (5), and switching the field for reading an image from the high-definition image storage means (3) using the high-definition image reading means (5) ( 10), and an image switching means (11) that receives a switching timing signal from the control means (10) and generates a switching signal for image synthesis, and the read high-definition image and the read NTSC moving image. And an image synthesizing means (12) for synthesizing based on the switching signal.

[0011]

In the present invention, by the second image reproducing means (2),
The second image is decoded as an image having the same field frequency as the first image. In the present invention, the NTSC moving image reproducing means
Due to (2), NTSC video has a field frequency of 60.00 Hz.
This NTSC moving image is temporarily expanded and played back with
It is written in the NTSC moving image storage means (6, 7) and read out in relation to the timing of the high-definition image.

In the present invention, the second image is the image storage means.
It is written once in (6, 7). When the odd field of the first image is output, the odd field of the second image is read from the image storage means (6), and when the even field of the first image is output, the even field of the second image is read from the image storage means (7). The field is read. Further, in the present invention, an image reproducing device for reading and combining and displaying a high-definition image and a compressed moving image, wherein the high-definition image reproducing means (1) reproduces the high-definition image, and the NTSC moving image reproducing means (2)
By setting the field frequency to 60.00Hz, the original NTSC moving image compressed by the interlace method is decompressed to reproduce the original image.
(4) Write the high-definition image from the high-definition image reproduction means (1) to the high-definition image storage means (3),
The NTSC moving picture reproducing means by the TSC moving picture writing means (8)
The NTSC image from (2) is written to the NTSC moving image storage means (6, 7), the high-definition image reading means (5) reads the high-definition image from the high-definition image storage means (3), and the NTSC moving-image reading means (9) reads the NTSC moving image from the NTSC moving image storage means (6, 7), and controls the control means (1
0), the NTSC video image storage means (6, 7) from the NTSC
The timing of reading an image using the moving image reading means (9) is delayed by one field compared to the timing of reading an image from the high-definition image storage means (3) using the high-definition image reading means (5), and A field for reading an image from the high-definition image storage means (3) is switched using the high-definition image reading means (5), and an image switching means (11) receives a switching timing signal from the control means (10) to synthesize an image. A switching signal for use is generated, and the read high-definition image and the read NTSC moving image are synthesized by the image synthesizing means (12) based on the switching signal.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the image reproducing apparatus of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing this embodiment. In FIG. 1, reference numeral 1 is an HDTV image reproducing device. The HDTV image reproducing device 1 reproduces Ha-Hi-vision still images.

Reference numeral 2 is an NTSC moving image reproducing apparatus. This NTSC
The moving image reproducing apparatus 2 reproduces an image which is originally an NTSC moving image and which has a field frequency of 60.00 Hz and is compressed by interlace. 3 is an HDTV memory.
The HDTV memory 3 has a capacity for one high-definition still image frame.

Reference numeral 4 is an HDTV write address counter. This HDTV write address counter 4 is the above HDTV
It is used when writing a still image read from the image reproducing device 1 into the HDTV memory 3. Reference numeral 5 is an HDTV read address counter. The HDTV read address counter 5 is used when reading the high-definition still image written in the HDTV memory 3.

6 is an NTSC odd field memory, 7 is NT
SC Even field memory. These two field memories 6 and 7 each have a capacity for one field of moving picture, and the interlaced moving picture obtained from the NTSC moving picture reproducing apparatus 2 is stored in the memory for odd field in the even field. The field image is written in the even field memory.

Reference numeral 8 is an NTSC write address counter. This NTSC write address counter 8 is the NTSC
A write address is generated when an image is written in the odd field memory 6 and the NTSC even field memory 7. Reference numeral 9 is an NTSC read address counter. this
The NTSC read address counter 9 generates a read address when reading an image from each of the memories 6 and 7.

Reference numeral 10 is a host microcomputer. The host microcomputer 10 performs processing such as shifting the HDTV read address counter 5 from the high-definition image read field, and delaying the NTSC read address counter 9 from the NTSC moving image read field by one field. The image switching signal generator 11, which will be described below, is designated at which timing the image is switched.

Reference numeral 11 is an image switching signal generator. The image switching signal generator 11 receives the designation from the host microcomputer 10 and generates an image switching signal to the image synthesizer 12 described below. Reference numeral 12 is an image synthesizer. The image synthesizer 12 uses the image data from the HDTV memory 3 and the NTSC odd field memory 6 or the NT
The image data from the SC even field memory 7 is switched and image-synthesized by the signal from the image switching signal generator 11.

A brief description will be given with reference to FIGS. FIG. 2 shows a state in which an NTSC moving image (NT) is embedded and combined in a high-definition image (HD). FIG. 3 is a diagram showing the HDTV and NTSC vertical sync signals in a simplified form for convenience of explanation.

FIG. 4 is a diagram showing luminance signals of high-definition and NTSC for one horizontal scanning period. As is clear from this figure, the high-definition image advances by two horizontal scans or more during one horizontal scan period of the NTSC moving image. Therefore, they cannot be combined at the same time.

In addition, with the high-definition field frequency
Even at NTSC field frequencies, 60.00 Hz and 59.94
Since the frequency is set to Hz, it is not possible to easily combine the images as it is. However, as shown in Figure 3, NTSC
Change the playback field frequency of normal from 59.94Hz to 60.00Hz of high-definition, NTSC just played back
If the image for one field is written once in the image memory and the image written is read out when the next field scanning starts, the image due to the difference in the horizontal scanning period and the field frequency can be obtained. Synthesis problems are resolved.

Therefore, in the present embodiment, MPEG, which is an international standard for moving picture compression, is used, and NTSC moving images are interlaced and compressed by the MPEG method, and the field frequency is designated to 60.00 Hz. The decoded moving image is used. FIG. 5 is a diagram showing a scanning field divided into an odd field and an even field for a high-definition image and an NTSC moving image.

FIG. 6 shows a state in which the scanning field relationships of high-definition and NTSC are shifted by one field according to this embodiment. In this process of this embodiment, the HDTV and NTSC scan fields are divided into an odd field and an even field at the same time. Figure 7
FIG. 4 shows the image relationship for each field when reproducing high-definition and NTSC moving images in this embodiment. That is, the devices (1) and (2) are interlocked with each other and output the same field signal.

FIG. 8 shows a state in which the field of high-definition is switched and the NTSC moving image is delayed by one field to be combined with the high-definition image in this embodiment. FIG. 9 is a diagram for explaining the present embodiment in an easy-to-understand manner, and shows a state in which the character "X" is displayed when normal scanning is performed. Originally, the display should be like this.

However, when the NTSC moving image is delayed by one field and displayed, if the high-definition image scans the odd field, the NTSC moving image scans the even field one field before and the high-definition image scans the even field. In this case, since the NTSC moving image scans the odd field that is one field before, the result is that the scanning of the NTSC moving image displayed on the high-definition screen is switched between the even lines and the odd lines.

FIG. 10 shows the display of the character "X" in this state. FIG. 11 shows a state where the scanning state of the NTSC moving image shown in FIGS. 6 and 10 is embedded in the high-definition screen, and it can be seen that the even field and the odd field are inverted. FIG. 12 shows the case where the same field is scanned. The fields shown by solid lines correspond to odd fields, and the fields shown by broken lines correspond to even fields.

This embodiment will be described with reference to these figures. In the case where a high-definition image from the host microcomputer 10 is combined with a high-definition image that was originally NTSC, a moving image compressed by interlace with a field frequency of 60.00 Hz (hereinafter referred to as “NTSC moving image”) prior to all processing. The combination position and the image size are set for the image switching signal generator 11.

The image switching signal generator 11 has a composition start address register and a composition pixel number register (not shown), and the set values are written in these registers. Figure 2
Shows a state in which an NTSC video image is compositely displayed on a part of a high-definition image. In FIG. 2, X is a horizontal start address when an NTSC video image is combined with a high-definition image, Y is a vertical start address, XS is the horizontal pixel number of the NTSC video image, and YS is a vertical pixel number. Represents a number.

XS and YS represent the size of the composite image and may be given from the outside by using a host microcomputer, but they should be obtained from the video sequence layer in the bit stream of MPEG which is an international standard for moving image compression. You can also The data set by either method is set in the image switching signal generator 11.

Here, among the values of the HDTV read address counter, the horizontal direction is HDRHAD and the vertical direction is HDRV.
If AD, X ≦ HDRHAD <(X + XS), &, Y ≦ HDRVAD <(Y + YS), then an NTSC moving image is output.

At other times, a high-definition image is output. By the way, in the combined image, originally, FIGS.
As shown in 2, even when scanning the high-definition odd field, the NTSC also scans the odd-numbered field, and while scanning the high-definition even field, the NTSC also scans the even-numbered field. The image of the field and the image of the odd field are mixed up.

This is referred to as "line inversion", but as described above, when the NTSC image is delayed by one field, as shown in FIGS. 6 and 11, for example, an even field of NTSC scans an odd field of HDTV. When an NTSC video image is synthesized with a high-definition video, the character "X" as originally shown in FIG. 9 should be displayed in the NTSC video image, but the display as shown in FIG. 10 is made. And becomes "line inversion".

In order to avoid this state, the read field of the high-definition image may be displayed by switching the even field and the odd field in correspondence with the delay of the NTSC moving image by one field. Less than,
A more specific description will be given using the block diagram of FIG. FIG.
HDTV image playback device 1 and NTSC video image playback device 2
A case will be described in which, when the respective images are read out and these images are combined and output, reproduction is started from the odd field.

As the processing on the high-definition image side, 1-1. A high-definition still image is read from the HDTV image reproduction device 1, a write address is obtained from the HDTV write address counter 4, and the high-definition still image is written to an address corresponding to an odd field of the HDTV memory 3. 1-2. HD by the control signal from the host microcomputer 10.
The read field of the TV read address counter 5 is switched from the original odd field to the even field.

1-3. HDTV read address counter 5
HDTV memory 3 which got the address of the even field from
The last recorded even field high-definition still image is supplied to the image synthesizer 12. By the above-mentioned processing, the high-definition still image is supplied only in this field, and the contents not related to the high-definition still image reproduced at that time are supplied. 1-4. The host microcomputer 10 is used to mask the output of the image synthesizer 12 only in this field.

As the processing on the NTSC moving image side, 1-5. An NTSC moving image compressed at a field frequency of 60.00 Hz by MPEG is expanded at a field frequency of 60.00 Hz by using the NTSC moving image reproducing apparatus 2 and a write address is obtained from the NTSC write address counter 8 to generate an NTSC odd field memory 6 Write in.

1-6. A read signal selected by the NTSC read address counter 9 is switched from the original odd field memory 6 to the even field memory 7 by a control signal from the host microcomputer 10. 1-7. The even field memory 7 selected by the NTSC read address counter 9 supplies the last recorded even field NTSC moving image to the image synthesizer 12.

However, in this case as well, the contents not related to the NTSC moving image reproduced at that time are supplied only in this field. 1-8. The host microcomputer 10 is used to mask the output of the image synthesizer 12 only in this field. When both of them complete the writing of the odd field, the writing of the even field starts after the vertical blanking period.

When the vertical blanking period ends, image reading for the second field starts. As processing on the high-definition image side, 2-1. A high-definition still image is read from the HDTV image reproduction device 1, a write address is obtained from the HDTV write address counter 4, and written to an address corresponding to an even field of the HDTV memory 3.

2-2. A control signal from the host microcomputer 10 switches the read field of the HDTV read address counter 5 from the original even field to the odd field. 2-3. The HDTV memory 3 which has obtained the address of the odd field from the HDTV read address counter 5 supplies the finally recorded high-definition still image of the odd field to the image synthesizer 12. As processing on the NTSC moving image side, 2-4. An NTSC video image compressed at a field frequency of 60.00 Hz by MPEG is expanded at a field frequency of 60.00 Hz by using the NTSC video image playback device 2, and a write address is obtained from the NTSC write address counter 8 to obtain an NTSC even field memory 7 Write in.

2-5. In response to a control signal from the host microcomputer 10, the read memory selected by the NTSC read address counter 9 is switched from the original even field memory 7 to the odd field memory 6. 2-6. The odd field memory 6 selected by the NTSC read address counter 9 supplies the last recorded odd field NTSC moving image to the image synthesizer 12.

When the writing of the even field is completed in both cases, the writing of the odd field is performed again after the vertical blanking period. The image synthesizer 12 immediately before the vertical blanking period combines the odd field image of the high-definition still image and the first odd field image of the NTSC moving image. The position and the image size of the combined image are preset by the host microcomputer 10.

When entering the odd field of the second frame, the processing on the high-definition image side is as follows: 3-1. A high-definition still image is read from the HDTV image reproduction device 1, a write address is obtained from the HDTV write address counter 4, and the high-definition still image is written to an address corresponding to an odd field of the HDTV memory 3.

3-2. A control signal from the host microcomputer 10 switches the read field of the HDTV read address counter 5 from the original odd field to the even field. 3-3. The HDTV memory 3 which has obtained the even field address from the HDTV read address counter 5 supplies the last recorded even field high-definition still image to the image synthesizer 12.

As the processing on the NTSC moving image side, 3-3. An NTSC moving image compressed at a field frequency of 60.00 Hz by MPEG is expanded at a field frequency of 60.00 Hz by using the NTSC moving image reproducing apparatus 2 and a write address is obtained from the NTSC write address counter 8 to generate an NTSC odd field memory 6 Write in.

3-4. A read signal selected by the NTSC read address counter 9 is switched from the original odd field memory 6 to the even field memory 7 by a control signal from the host microcomputer 10. 3-5. The even field memory 7 selected by the NTSC read address counter 9 supplies the last recorded even field NTSC moving image to the image synthesizer 12.

When the writing of the odd field is completed in both cases, the writing of the even field is started after the vertical blanking period. When the vertical blanking period ends, the process shifts to the even field of the second frame. That is, the image is not reproduced in the first field of the first frame, and the image is output in the second field. After that, natural image synthesis is performed by continuously performing the same processing.

FIG. 8 shows the final image composition result in field units. As is clear from this figure, the HDSC readout field is switched and the NTSC moving image is set to 1
When the two systems of images are combined and displayed with a frame delay, the images can be combined conveniently. In this embodiment, the HDTV image reproducing device 1 and the NTSC are used for simplification of explanation.
Video playback device 2, NTSC odd field memory 6
The NTSC even field memory 7 and the like have been separately described, but it is needless to say that these do not have to be separate and can be combined into one if each data can be managed.

The present application is not limited to the above-mentioned embodiment, and various uses can be made within the scope of the claims. That is, in the above embodiment, the high-definition image and the NTSC image have been described, but the present application is not limited to this, and another television system may be used. Further, in the above-described embodiment, the high-definition image is a still image, but the present invention is not limited to this and may be a moving image.

On the contrary, although the NTSC image is a moving image in the above embodiment, the present invention is not limited to this, and a still image may be used. Further, in the above embodiment, the high-definition image is temporarily stored in the memory (3), but this may be through. In the above-mentioned embodiment, the timings of the high-definition image and the NTSC image are adjusted by controlling the read timings of the memory (3) and the memories (6, 7). I will need it. That is, the sync signal of the high-definition image is detected. And
Circuit means for selecting the memory (6, 7) for detecting and reading the odd / even field by this synchronization detection, and circuit means for setting the read timing of this memory (6, 7) by the combination position and the synchronization signal. is necessary.

That is, according to the above-mentioned embodiment, instead of omitting such a circuit, the circuits (3), (4) and (5) are provided,
It is easy to control.

[0053]

According to the image reproducing apparatus of the first aspect of the present invention, the field frequencies can be easily matched when synthesizing at least two images having different field frequencies. According to the image reproducing apparatus of the second aspect of the present invention, the field frequencies of the high-definition image and the NTSC image can be easily matched, and the NTSC image of the two horizontal scanning periods is temporarily stored in the image memory.
Since it is written in (6, 7) and read out at the timing of the high-definition image, the displayed fields do not change.

According to the image reproducing apparatus of the third aspect of the present invention, since the second image (NTSC image) is also displayed by the interlace, this display portion is the same as the first image (high-definition image) portion. High-definition images can be obtained. According to the image reproducing apparatus of claim 4 of the present invention, the high-definition image and the NTSC
When images with different processing speeds, such as moving images, are combined and displayed, they are displayed even when an image with a slow processing speed is temporarily recorded in the image memory and displayed in the next field. Natural image composition is possible without the inconvenience of field exchange. In other words, NT caused by mismatch of playback fields
It is possible to prevent line inversion in the SC moving image part and display it without impairing the naturalness of the image.

[Brief description of drawings]

FIG. 1 is a block diagram showing an image reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which an NTSC moving image is embedded and combined in a high-definition image of the image reproducing apparatus of this embodiment.

FIG. 3 is a high-definition video of the image reproducing apparatus of this embodiment and
It is the figure which simplified and represented the vertical synchronizing signal of NTSC for convenience of explanation.

FIG. 4 is a diagram showing high definition and NTSC luminance signals for one horizontal scanning period.

FIG. 5 is a diagram in which a scanning field is divided into an odd field and an even field for high definition and NTSC.

FIG. 6 is a diagram showing a state in which scanning field relationships of high-definition and NTSC are shifted by one field.

FIG. 7 is a diagram showing the relationship between high-definition and NTSC scan fields at the time of output from the devices (1) and (2) of this embodiment.

FIG. 8 is a diagram showing a relationship between scanning fields after image composition of high-definition and NTSC is performed using the image reproducing apparatus of this embodiment.

FIG. 9 is a diagram showing a display state of a character “X” when the image reproducing apparatus of this embodiment performs a normal scan.

FIG. 10 is a diagram showing a display state of the character “X” when the scanning of the even lines and the scanning of the odd lines of the image reproducing apparatus of this embodiment are switched.

[Fig. 11] Fig. 11 is a diagram showing a display state in the case where an NTSC moving image is combined with a part of a high-definition image and opposite fields are scanned.

FIG. 12 is a diagram showing a display state when the same field is scanned when an NTSC moving image is combined with a part of the high-definition image of the image reproducing apparatus of this embodiment.

[Explanation of symbols]

(1) ・ ・ ・ ・ ・ ・ HDTV image playback device (high-vision image playback means), (2) ・ ・ ・ ・ ・ ・ NTSC video image playback device (NTSC video image playback device), (3) ・ ・ ・・ ・ ・ ・ HDTV memory (high-definition image storage means), (4) ・ ・ ・ ・ ・ ・ HDTV write address counter (high-definition image writing means), (5) ・ ・ ・ ・ ・ HDTV read address counter ( High-definition image reading means), (6) ... NTSC odd field memory (NTSC moving image storage means), (7) ... NTSC even field memory (NTSC moving image storage means), (8) ・ ・ ・ ・ ・ ・ NTSC write address counter (NTSC moving image writing means), (9) ・ ・ ・ ・ ・ ・ NTSC read address counter (NTSC moving image reading means), (10) ・ ・・ ・ ・ Host microcomputer (control means), (11) ・ ・ ・ ・ ・ Image switching signal generator (image switching means), (12) ・ ・ ・ ・ ・ Image synthesizer ( Image synthesizing means).

Claims (4)

[Claims] 1. An image reproducing apparatus for synthesizing and displaying a first image and a second image having different field frequencies, the first image reproducing means (1) outputting the first image, and a compression code. Second image reproducing means (2) for decoding the field frequency of the second image as the first field frequency when decoding the converted second image, and the timing of the two images of the same field frequency Image synthesis control means (3,6,7,9,10,12)
An image reproducing device comprising: 2. An image reproducing device for reading out a high-definition image and a compressed moving image and combining and displaying the same, wherein the high-definition image reproducing means reproduces the high-definition image.
(1), an NTSC video playback means (2) for expanding and playing back a video that was originally an NTSC video compressed by the interlace method by setting the field frequency to 60.00 Hz, and the NTSC video An NTSC moving image writing means (8) for writing the NTSC image from the image reproducing means (2) to the NTSC moving image storage means (6, 7), and an NTSC moving image from the NTSC moving image storage means (6, 7). An NTSC moving image reading means (9) for reading, and the NTSC moving image reading means (9) in relation to the timing of the high-definition image.
Control means (10) for reading an image from the moving picture storage means (6, 7) using the NTSC moving picture reading means (9), and the high-definition image based on the switching position control signal from the control means (10). An image reproducing device comprising: an image synthesizing means (12) for synthesizing the read NTSC moving image. 3. An image reproducing device for synthesizing and displaying two kinds of images, the first image reproducing means (1) for reproducing the first image and the second image reproducing means (2) for reproducing the second image. An image writing means (8) for writing the second image from the second image reproducing means (2) in the image storage means (6, 7), and an operation timing controlled by the control means (10), 1
The image storage means (6,
Image reading means for reading the odd field of the second image from 7) and reading the even field of the second image from the image storage means (6, 7) when outputting the even field of the first image
(9), and image synthesizing means (12) for synthesizing the read first image and second image based on the switching position control signal from the control means (10). Image reproduction device. 4. An image reproducing apparatus for reading out a high-definition image and a compressed moving image and combining and displaying the same, wherein the high-definition image reproducing means reproduces the high-definition image.
(1) and the field frequency is set to 60.00Hz, NTSC video image reproduction means (2) for expanding the video image that was originally the NTSC video image compressed by the interlace method and playing back the original image, and A high-definition image writing means (4) for writing the high-definition image from the high-definition image reproduction means (1) to the high-definition image storage means (3) and an NTSC image from the NTSC moving image reproduction means (2)
NTSC moving picture writing means (8) to write to moving picture storage means (6, 7)
A high-definition image reading means (5) for reading a high-definition image from the high-definition image storage means (3), and an NTSC moving image reading means (9) for reading an NTSC moving image from the NTSC moving image storage means (6, 7). ), And the timing of reading an image from the NTSC moving image storage means (6, 7) using the NTSC moving image reading means (9), the HDTV image reading means (5) from the HDTV image storage means (3) The control means (1) delays the field by one field as compared with the timing of reading the image using the, and switches the field for reading the image from the high-definition image storage means (3) using the high-definition image reading means (5).
0) and an image switching means (11) that receives a switching timing signal from the control means (10) and generates a switching signal for image synthesis.
And the read high-definition image and the read NTSC
An image reproducing apparatus comprising: an image synthesizing unit (12) for synthesizing a moving image based on the switching signal.