JP2000188718A - Video signal reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform sequential scanning conversion processing even to a video signal of film material in which a part is recorded as a prescribed video signal by discriminating a material kind according to the discrimination flag of the kind of a signal generated when the film material is converted into an interlaced scanning video signal and also discriminating a material signal by a video signal converted by the interlaced scanning video signal. SOLUTION: A 1st material discrimination circuit 8 reads the discrimination flag of a disk 1 and discriminates the kind of a main video signal, and a field repeat signal generation circuit 9 generates a field repeat signal when the main video signal is a film material. A 2nd material discrimination circuit 14 discriminates the material of the main video signal according to the field repeat signal and an output of a coincidence detection circuit 15. A sequential scanning conversion circuit 17 performs sequential scanning video conversion of an output of an interlaced scanning video signal reproduction circuit 4 in accordance with an output of a repeat cycle signal generation circuit 18 having a flywheel function when the circuit 14 discriminates it as the film material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transfers various video information such as movie material and video material such as an optical disk such as a DVD (Digital Video Disk), a video tape, a satellite broadcast and a terrestrial broadcast, and sequentially scans a video signal. The present invention relates to a video signal reproducing device for reproducing.

[0002]

2. Description of the Related Art Conventionally, video output of DVDs, satellite broadcasts, and the like is generally output by interlaced scanning so that it can be reproduced by a television receiver. With the spread of video signals and the like, video signal reproducing devices for converting these interlaced video signals into sequential scanning signals are being introduced.

FIG. 17 is a block diagram showing a configuration of a conventional video signal reproducing apparatus. In FIG. 17, reference numeral 1 denotes a disk, which is a main video signal composed of either a video signal obtained by converting a film material video into an electric signal or a video signal using a video signal as a material, and whether the main video signal is a film material or a video material. Is encoded in a signal form suitable for recording in advance, modulated, and recorded. Reference numeral 2 denotes a pickup, which converts a signal recorded on the disk 1 into an electric signal. Reference numeral 3 denotes a disk rotating device which rotates the disk 1 at a rotation speed suitable for reproduction. Reference numeral 4 denotes an interlaced scanning video signal reproducing circuit which demodulates and decodes the main video signal recorded on the disk 1 and outputs it as an interlaced scanning video signal. Reference numeral 5 denotes a first memory, which functions as a buffer memory when an interlaced video signal is reproduced. 6 is NTS
The C encoder converts the interlaced scanning video signal into the NTSC video format and outputs it. Reference numeral 7 denotes an interlaced scanning video output terminal from which an interlaced scanning video output reproduced from this terminal is output. Reference numeral 8 denotes a first material discrimination circuit which reads a discrimination flag recorded on the disc 1 from the output of the pickup 2. 9 is a field repeat signal generation circuit,
When the main video signal is a film material, the interlaced scanning video signal reproducing circuit 4 generates a field repeat signal for converting the main video signal into the interlaced scanning video signal. 10
Is a progressive scanning conversion circuit, which converts the output of the interlaced scanning video signal reproducing circuit 4 into a progressive scanning video signal and outputs it. Reference numeral 11 denotes a second memory, which has a capability of storing video signals for one field, and is used for the operation of the progressive scan conversion circuit 10. Reference numeral 12 denotes a D / A converter, which is a progressive scan conversion circuit 1
The output of 0 is converted into an analog value and output. Reference numeral 13 denotes a progressive scanning video output terminal from which a progressive scanning video signal is output to a video display device (not shown).

The operation of the conventional video signal reproducing apparatus configured as described above will be further described.

FIG. 18 is a schematic diagram showing the structures of an interlaced video signal and a progressively scanned video signal of a conventional video signal reproducing apparatus. In the interlaced scanning video signal, an image of one field is formed in 1/60 second, and two images are combined to form an image of one frame. The number of vertical pixels in each of the two fields is 240, and the pixels are arranged so as to fill the space between the pixels in the vertical direction. In the progressive scanning signal, one frame is 1/60 second and the number of vertical pixels is 480.

In both cases, the vertical frequency is 1/60 second, and the number of horizontal scanning lines is twice as large as that of the interlaced scanning video signal. Therefore, the horizontal scanning frequency is about 15.75 KHz. On the other hand, it becomes about 31.5 KHz in the progressive scanning video signal.

FIG. 19 is a signal schematic diagram showing a structure of a video signal recorded on the disk 1 of the conventional video signal reproducing apparatus. As shown in FIG. 19, there are two types of video signals recorded on the disc 1. That is, a) shown in FIG. 19 is a film material. In this case, the original material is a film image composed of pictures of 24 frames per second, and 720 pixels horizontally and 480 dots vertically for each frame. The image is compressed and recorded on the disk 1. FIG. 19B shows a video material image. In this case, the original material is an interlaced scan image of 30 frames / 60 fields per second. Each frame is an image of 720 horizontal dots and 480 vertical dots, but since it is interlaced, each field becomes an image of 720 horizontal dots and 240 vertical dots, and is compressed and recorded on the disk 1. As shown in FIG. 19, a discrimination flag indicating whether the main video signal is a film material or a video material is recorded on the disc 1 simultaneously with the main video signal.

FIG. 20 is a signal schematic diagram showing a reproduced signal on a film material disk of a conventional video signal reproducing apparatus.

When the material of the video signal recorded on the disk 1 is a film, as shown in FIG. 20, an image of 720 frames horizontally and 480 dots vertically is recorded at 24 frames per second as recording information. The interlaced scanning video signal reproducing circuit 4 reads a signal recorded on the disk 1 from an output of the pickup 2. The first material discrimination circuit 8 reads a discrimination flag from the output of the pickup 2 and discriminates the type of the main video signal, and outputs the discrimination signal to the interlaced scanning video signal reproduction circuit 4 and the field repeat signal generation circuit 9. Based on the output of the first material discriminating circuit 8, the interlaced scanning reproducing circuit 4 recognizes that the main video signal recorded on the disc 1 is a film material. As shown in FIG. 20, the disc 1 has film material images with frame numbers...
are recorded in the order of n, n + 1, n + 2, n + 3,. The interlaced scanning video signal reproducing circuit 4 converts the film material signal recorded in this way into an interlaced scanning video and outputs it. This is because a television monitor is generally most often used as an image display device for viewing at home, and its display format is interlaced scanning.
Because it is designed to handle 0-field video,
At the same time, the interlaced scanning video signal reproducing circuit 4 converts an image of 24 frames per second into an interlaced scanning video of 30 frames / 60 fields per second and outputs it. The interlaced scanning video signal reproducing circuit 4 divides each frame of the recording information into two interlaced scanning field images, odd and even, as shown in the interlaced scanning reproduced video signal in FIG. In response to a field repeat signal that repeats every five fields, the first field is repeatedly displayed after the last field for each frame, so that a film image of 24 frames per second can be skipped by 30 frames per second / 60 fields. And output. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 4 reproduces an image. The interlaced scanning video signal reproducing circuit 4 outputs the frame division of the interlaced scanning video signal generated in this way to the sequential scanning conversion circuit 10 as a field repeat signal as shown in FIG.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this way into an NTSC standard video signal and outputs it via the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the film material video converted into the interlaced scanning video.

Further, an interlaced scanning video signal reproducing circuit 4
Inputs the interlaced scanning video signal to the sequential scanning conversion circuit 10. The progressive scan conversion circuit 10 recognizes that the input digital video signal is a film material based on the presence or absence of the field repeat signal output of the field repeat signal generation circuit 9. That is, when the main image is a film material, the field repeat signal output from the field repeat signal generation circuit 9 changes in a 5-field cycle as shown in FIG. 12, and the change is detected. If so, the sequential scanning video conversion is performed. In the case of a film material, an image of 720 horizontal dots and 480 vertical dots is originally divided into two fields of 720 horizontal dots and 240 vertical dots for each frame of each material, and these may be synthesized again. Accordingly, the progressive scan conversion circuit 10 can detect the switching timing of the frame of the film signal used as the material of the input digital video signal based on the field repeat signal shown in FIG. Progressive scan conversion circuit 10
Is to store the first field of the input of the progressive scan conversion circuit shown in FIG. 20 in the second memory 11, store the second field in the second memory 11, and read out both information at double speed line by line. As a result, the output of the progressive scan conversion circuit shown in FIG. 20 is obtained. The converted video signal is converted into an analog signal by the D / A converter 12 and output from the progressive scanning video signal output terminal 13. A progressive scan video signal television monitor (not shown) is connected to the progressive scan video signal output terminal 13 so that the user can watch the film material video returned to the progressive scan video.

FIG. 21 is a schematic diagram showing a signal reproduced from a conventional video material disk.

If the material of the video signal recorded on the disk 1 is video, as shown in FIG. 21, the recording information is an interlaced scan image of 30 frames / 60 fields per second. An image of 240 dots vertically is recorded. The interlaced scanning video signal reproducing circuit 4 reads a signal recorded on the disk 1 from an output of the pickup 2. The first material discrimination circuit 8 reads a discrimination flag from the output of the pickup 2 and discriminates the type of the main video signal, and outputs the discrimination signal to the interlaced scanning video signal reproduction circuit 4 and the field repeat signal generation circuit 9. As shown in FIG. 21, the disk 1 has video material images having frame numbers..., M, m + 1, m + 2, m +
3, m + 4,... Are recorded in this order. The interlaced scanning video signal reproducing circuit 4 outputs the video material signal recorded in this manner as an interlaced scanning video signal as shown in the interlaced scanning reproduced video signal in FIG. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 4 reproduces an image.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this manner into an NTSC standard video signal and outputs it via the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the video material video converted into the interlaced scanning video.

Further, an interlaced scanning video signal reproducing circuit 4
Inputs the interlaced scanning video signal to the sequential scanning conversion circuit 10. The progressive scan conversion circuit 10 recognizes that the input digital video signal is a video material based on the presence or absence of the field repeat signal output of the field repeat signal generation circuit 9. That is, when the main video is a video material, the field repeat signal output from the field repeat signal generating circuit 9 does not change in a 5-field cycle as shown in FIG. 21, so that it is detected and the main video is a video material. To perform sequential scanning video conversion. In the case of a video material, the progressive scan conversion circuit 10 generates a progressive scan video signal using two pieces of field information, namely, field video information and a field located before the field video information. At this time, the progressive scan conversion circuit 10 vertically interpolates the pixels having a small motion between the previous field and the previous field shown in FIG. For a pixel having a large motion in the above, vertical interpolation data is generated from upper and lower pixel data in the same field to obtain an output of the progressive scan conversion circuit shown in FIG. The converted video signal is converted into an analog signal by the D / A converter 12 and output from the progressive scanning video signal output terminal 13. A progressive scan video signal television monitor (not shown) is connected to the progressive scan video signal output terminal 13, so that the user can watch the video material video converted into the progressive scan video.

FIG. 22 is a schematic signal diagram showing a reproduced signal from a disc which is a film material of a conventional video signal reproducing apparatus and a part of which is recorded as a video signal.

In some cases, even a signal source of a film material is partially recorded as a video signal. This is because, before the material is recorded on a video or the like at a stage before being recorded on the disc 1, when the work of returning the information once to the information of 24 frames is performed again, a part of the material remains as a video, and this is left as it is on the disc 1. It is in a state as recorded in.
That is, when generating the information to be recorded on the disc 1, it is detected from the material once recorded in the 60-field video that the data matches every 5 fields, and the frame of the original picture is recorded in the video. Since a break is detected, the information is returned to the information of 24 frames, and the data is recorded on the disc after being encoded, if noise or the like occurs in the information on the video, matching detection for every five fields cannot be performed well. This is a case where what remains as video information is recorded on a disk as it is.

In FIG. 22, the n-th frame of the recording information, n
The + 1st frame is recorded as a film material, and n +
The second to n + 6th frames are recorded as video information. Further, it is shown that the film after the (n + 7) th frame is recorded as a film material. When such a disc is reproduced by the conventional video information reproducing apparatus, the n-th frame, the (n + 1) -th frame, and the (n + 2) -th frame are processed as the film information. Since no signal is detected, the sequential scan conversion circuit 10 determines that the input is a video material, and thereafter performs a sequential scan conversion process as a video material up to the (n + 7) th frame, and performs a sequential scan conversion again as a film material at the (n + 8) th frame. start. That is, in the part shown in FIG. 22A, although the material is originally a film, the progressive scan conversion circuit 10 is used as a video material.
Operate, so that optimized progressive scan conversion cannot be performed.

[0019]

In this video signal reproducing apparatus, an optimized sequential video signal of a film material partially recorded as a video signal of 60 fields per second as described above. There is a problem that the scan conversion cannot be performed and the image quality is deteriorated.
For this reason, it is required to introduce a video signal reproducing apparatus that can perform progressive scan conversion processing suitable for a film material even for a video signal of a film material partially recorded as a video signal of 60 fields per second. .

According to the present invention, in order to determine the type of the material of the video signal, the main video signal is obtained from the output of the material discriminating circuit and the output of the field difference detecting circuit between the interlaced scanning video signal and the interlaced scanning video signal two fields before. Discriminates between a video signal of the first type and a video signal of the second type, so that a video signal of a film material partially recorded as a video signal of 60 fields per second can be correctly filmed. It is an object of the present invention to provide a video signal reproducing apparatus capable of performing a progressive scan conversion process suitable for a material.

[0021]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a method for determining the type of a field repeat signal or a main video signal which occurs when a film material is converted into an interlaced scan video signal. Means for determining the type of the material, and means for determining whether the material signal is a film or a video using a video signal once converted to an interlaced video signal, and determining the material based on the determination results of both means. By performing the discrimination, it is possible to obtain a video signal reproducing apparatus that can perform progressive scan conversion processing suitable for a film material even for a video signal of a film material partially recorded as a video signal of 60 fields per second. .

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a method for outputting a first timing signal indicating a field to be repeatedly output when a main video signal is a first type of video signal. 1 timing signal generating means, first material discriminating means for discriminating whether the main video signal is a first type video signal or a second type video signal based on a discrimination flag, and first material discriminating means. When the video signal is determined to be a first type of video signal, the main video signal is converted into a 60-field interlaced video signal according to the output of the first timing signal generating means, and the first material determination is performed. When the means determines that the main video signal is the second type of video signal, the interlaced scanning video signal reproducing means for outputting the main video signal as it is and a memory for storing the output of the interlaced scanning video signal reproducing means for two fields. A field memory, a field difference detecting means for detecting a difference between an interlaced scanning video signal reproducing means output and a field memory output, and a first material discriminating means output or a first timing signal generating means output and a field difference detecting means output. A second material discriminating means for discriminating whether the main video signal is a first type video signal or a second type video signal; and the second material discriminating means converts the main video signal into a first type video signal. A second timing signal generating means for generating a second timing signal indicating a break of a frame of the film material in the interlaced scanning video signal by the output of the field difference detecting means when it is determined that there is the second timing signal;
When the method of generating the insertion scanning signal is changed according to the output of the material discriminating means, and the second material discriminating means determines that the main video signal is the first type of video signal, the second timing signal is output. And a progressive scan conversion means for synthesizing two fields of the interlaced scan video signal of 60 fields per second in response to obtain a progressive scan video signal. Is detected, the second material discriminating means discriminates that the material of the main video signal is a film, and performs sequential scan conversion. Therefore, a part is recorded as a video signal of 60 fields per second. Provided is a video signal reproducing apparatus capable of performing sequential scan conversion processing suitable for a film material correctly even for a video signal of a film material which has been lost. In the first aspect, the second material discriminating means is the first kind of video signal when the output of the first material discriminating means or the state of the timing generating means is the state of the first kind of video signal. And the state of the output of the first material determining means or the state of the timing generating means is changed from the state of the first type of video signal to the second state.
Even if the state transits to the state of the video signal of the type, if the field difference detection means detects a field match at a specific period, it is characterized by that it is determined to be the video signal of the first type. Even if the state of the discrimination flag transferred together with the main video signal changes from the state of the first type of video signal to the state of the second type of video signal, the field difference detection means determines that the field is two fields before the main video signal. If the image coincidence is detected at a specific period, the second material discriminating means discriminates that the material of the main video signal is a film material and performs sequential scan conversion. Provided is a video signal reproducing apparatus which can perform progressive scan conversion processing suitable for a film material even for a video signal of a recorded film material.

The invention according to claim 3 of the present invention relates to the invention according to claim 2, wherein the second material discriminating means is arranged so that the output of the first material discriminating means or the state of the timing generating means is the first. Even if the state of the video signal of the type is changed to the state of the video signal of the second type, if the field difference detecting means detects a field match every five fields, the first state is obtained.
The state of the discrimination flag transmitted together with the main video signal changes from the state of the first type of video signal to the state of the second type of video signal. Even if the field difference detecting means detects that the image coincidence with the image two fields before the main video signal occurs every five fields, the second material discriminating means uses the film material as the material of the main video signal. Since it is determined that there is a video signal and the progressive scan conversion is performed, even a video signal of a film material partially recorded as a video signal of 60 fields per second can be correctly subjected to progressive scan conversion processing suitable for the film material. A signal reproducing device is provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of a video signal reproducing apparatus according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes a disk, which is a main video signal composed of either a video signal obtained by converting a film material video into an electric signal or a video signal using a video signal as a material, and whether the main video signal is a film material or a video material. Is encoded in a signal form suitable for recording in advance, modulated, and recorded. Reference numeral 2 denotes a pickup, which converts a signal recorded on the disk 1 into an electric signal. Reference numeral 3 denotes a disk rotating device which rotates the disk 1 at a rotation speed suitable for reproduction. 4
Is an interlaced scanning video signal reproducing circuit which demodulates and decodes the main video signal recorded on the disk 1 and outputs it as an interlaced scanning video signal. Reference numeral 5 denotes a first memory, which functions as a buffer memory when an interlaced video signal is reproduced. Reference numeral 6 denotes an NTSC encoder which converts an interlaced scanning video signal into an NTSC video format and outputs it. 7
Is an interlaced scanning video output terminal from which an interlaced scanning video output reproduced from this terminal is output. Reference numeral 8 denotes a first material discrimination circuit which reads a discrimination flag recorded on the disc 1 from the output of the pickup 2. Reference numeral 9 denotes a field repeat signal generation circuit, and when the main video signal is a film material,
The interlaced scanning video signal reproducing circuit 4 generates a field repeat signal when converting the main video signal into the interlaced scanning video signal. Reference numeral 11 denotes a second memory, which has a capability of storing a video signal for one field, and is used for the operation of a progressive scan conversion circuit 17 (described later). Reference numeral 12 denotes a D / A converter, which converts the output of the sequential scan conversion circuit 17 into an analog value and outputs the analog value. Reference numeral 13 denotes a progressive scanning video output terminal through which a progressive scanning video signal is output to a video display device (not shown). Reference numeral 14 denotes a second material discriminating circuit which discriminates the type of the video signal recorded on the disc 1 from the output of the field repeat signal generating circuit 9 and the output of the second coincidence detecting circuit 15 and controls the progressive scan converting circuit 17. Control. A coincidence detection circuit 15 compares the output of the interlaced scanning video signal reproduction circuit 4 with the output of the third memory 16. Reference numeral 16 denotes a third memory, which outputs the output of the interlaced scanning video signal reproducing circuit 4 with a delay of two fields. Reference numeral 17 denotes a progressive scan conversion circuit, which converts the output of the interlaced scan video signal reproducing circuit 4 into a progressive scan video signal and outputs it. Reference numeral 18 denotes a repeat cycle signal generation circuit which supplies a field repeat signal required for sequential scan conversion to the sequential scan conversion circuit 17 in accordance with the output of the second coincidence detection circuit 15.

The operation of the video signal reproducing apparatus according to the first embodiment of the present invention configured as described above will be further described.

FIG. 2 is a schematic diagram showing the structures of the interlaced scanning video signal and the progressive scanning video signal according to the first embodiment of the present invention. In the related art, as described with reference to FIG. 18, in the interlaced scanning video signal, an image of one field is configured in 1/60 second, and two images are combined to form an image of one frame. The number of vertical pixels in each of the two fields is 240, and the pixels are arranged so as to fill the space between the pixels in the vertical direction. In the progressive scanning signal, one frame is 1/60 second and the number of vertical pixels is 480.

In both cases, the vertical frequency is 1/60 second, and the number of horizontal scanning lines is twice as large as that of the interlaced scanning video signal. Therefore, the horizontal scanning frequency is about 15.75 KHz. On the other hand, it becomes about 31.5 KHz in the progressive scanning video signal.

FIG. 3 shows a disc 1 according to the first embodiment of the present invention.
FIG. 2 is a signal schematic diagram showing a structure of a video signal recorded in a video signal.
As shown in FIG. 3, the video signal recorded on the disk 1 has two forms. That is, a) shown in FIG. 3 is a film material, and in this case, the original material is a film image composed of pictures of 24 frames per second, and a horizontal
The image is compressed and recorded on the disk 1 as an image of 20 dots and 480 dots vertically. B) shown in FIG. 3 is a video material image. In this case, the original material is an interlaced scan image of 30 frames / 60 fields per second. Each frame is an image of 720 horizontal dots and 480 vertical dots.
The image becomes 240 dots vertically, and is compressed and recorded on the disk 1. As shown in FIG. 3, a discrimination flag indicating whether the main video signal is a film material or a video material is recorded on the disc 1 simultaneously with the main video signal.

FIG. 4 is a signal schematic diagram showing a reproduced signal from the film material disk according to the first embodiment of the present invention.

When the material of the video signal recorded on the disk 1 is a film, as shown in FIG. 4, an image of 720 frames horizontally and 480 dots vertically is recorded at 24 frames per second as recording information. The interlaced scanning video signal reproducing circuit 4 reads a signal recorded on the disk 1 from an output of the pickup 2. The first material discriminating circuit 8 reads a discriminating flag from the output of the pickup 2, discriminates the type of the main video signal, and outputs it to the interlaced scanning video signal reproducing circuit 4 and the field repeat signal generating circuit 9. Based on the output of the first discriminating circuit 8, the interlaced scanning reproducing circuit 4 recognizes that the main video signal recorded on the disc 1 is a film material. As shown in FIG. 4, the film material images on the disk 1 are frame numbers..., N, n + 1, n + 2, n +
3,... Are recorded. The interlaced scanning video signal reproducing circuit 4 converts the film material signal recorded in this way into an interlaced scanning video and outputs it. This is because television monitors are most often used as image display devices for viewing at home, and the display format is interlaced scanning. Also, television monitors are capable of moving pictures at 30 frames / 60 fields per second. And the interlaced scanning video signal reproducing circuit 4 simultaneously outputs 24 frames of video per second at 30 frames / 60 per second.
It is converted into a field interlaced image and output. The interlaced scanning video signal reproducing circuit 4 converts each frame of the recording information into odd and e as shown in the interlaced scanning reproduced video signal in FIG.
divided into two interlaced scanning field images of ven. Further, according to a field repeat signal output every five fields output by the field repeat signal generating circuit 9, the first field is repeated after the last field for each frame and displayed. As a result, a film image of 24 frames per second is converted into an interlaced scan image of 30 frames / 60 fields per second and output. The first memory 5
The interlaced scanning video signal reproducing circuit 4 functions as a buffer memory when reproducing an image.

The NTSC encoder 6 converts the interlaced video signal reproduced in this way into an NTSC standard video signal and outputs it via the interlaced video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the film material video converted into the interlaced scanning video.

Further, the interlaced scanning video signal reproducing circuit 4
Inputs the interlaced scan video signal to the progressive scan conversion circuit 17, the coincidence detection circuit 15, and the third memory 16.
The third memory 16 delays the input interlaced scanning video signal by two fields and outputs the delayed signal to the coincidence detection circuit 15.

FIG. 5 is a signal schematic diagram showing the operation of the coincidence detecting circuit in the film material disk according to the first embodiment of the present invention.

The coincidence detection circuit 15 determines whether the video signal material is a film material or a video material. In other words, if the input video signal is a signal converted from film to video, the first field is repeated after the last field for each frame from the beginning, so the same is performed once every five fields. The field will appear. Therefore, the match detection circuit 15
Is different from the output of the memory 16 and the output of the interlaced scanning video signal reproducing circuit 4 for each pixel in each field.
If it is detected that the number of pixels that are equal to or less than a predetermined threshold value is equal to or greater than a certain value, and if a field match is detected,
This match detection is shown in the field comparison information of FIG. 5, and thus becomes "1" every five fields.
Therefore, when the coincidence detection circuit 15 detects that the field comparison information changes every five fields, it determines that the material of this video signal is a film.

FIG. 6 is a flowchart showing a method of determining the second material determination circuit according to the first embodiment of the present invention.

As shown in FIG. 6, the second material discriminating circuit 14
Determines whether the material of the video signal is a film material or a video material based on the output of the field repeat signal generation circuit 9 and the output of the coincidence detection circuit 15. That is, while the field repeat signal is being generated, it is determined that the film material is present, and even if a transition is made from a state where the field repeat signal is generated to a state where it is not generated,
While the coincidence detection circuit determines that the film material is used, it is determined that the film material is used.

The repeat cycle signal generation circuit 18 generates the repeat cycle signal shown in FIG. 4 from the field comparison information for every five fields detected by the coincidence detection circuit 15. This is because the field comparison information merely indicates the degree of coincidence between the field and the information two fields before, for each field. In some cases, even when the field comparison information is lost, the repeat cycle signal generation circuit 18 has a role of a flywheel circuit for generating repeat information having a 5-field cycle.

When the second material discriminating circuit 14 determines that the main image is a film material, the progressive scan converting circuit 17 converts the progressively scanned image in accordance with the repeat cycle signal generated by the repeat cycle signal generating circuit 18. I do. That is, in the case of a film material, an image of 720 dots horizontally and 480 dots vertically is originally 720 dots wide and 240 dots long vertically for each frame of each material.
Since it is divided into two fields of dots, it is sufficient to combine them again. Therefore, the progressive scan conversion circuit 17
Can detect the switching timing of the frame of the film signal used as the material of the input digital video signal by the repeat cycle signal shown in FIG. In response to the repeat period signal, the progressive scan conversion circuit 17 stores the first field of the progressive scan conversion circuit input shown in FIG. 4 in the second memory 11 and then stores the second field in the second memory 11. By reading out both information at a double speed line by line, an output of the progressive scan conversion circuit shown in FIG. 4 is obtained. The converted video signal is converted into an analog signal by the D / A converter 12 and output from the progressive scanning video signal output terminal 13. A progressive scan video signal television monitor (not shown) is connected to the progressive scan video signal output terminal 13 so that the user can watch the film material video returned to the progressive scan video.

FIG. 7 is a signal schematic diagram showing a reproduced signal on the video material disk according to the first embodiment of the present invention.

When the material of the video signal recorded on the disk 1 is a video material, as shown in FIG. 7, the recording information is an interlaced scan image of 30 frames / 60 fields per second, and each field is 720 dots wide. , An image of 240 dots vertically is recorded. The interlaced scanning video signal reproducing circuit 4 reads a signal recorded on the disk 1 from an output of the pickup 2. The first material discriminating circuit 8 reads a discrimination flag from the output of the pickup 2 and discriminates the type of the main video signal, and the interlaced scanning video signal reproducing circuit 4
To the field repeat signal generation circuit 9. FIG.
As shown in FIG. 3, video material images are recorded on the disk 1 in the order of frame numbers..., M, m + 1, m + 2, m + 3, m + 4,. The interlaced scanning video signal reproducing circuit 4 outputs the video material signal recorded in this manner as an interlaced scanning video signal as shown in the interlaced scanning reproduced video signal in FIG. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 4 reproduces an image.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this manner into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7, so that the user can watch the video material video converted into the interlaced scanning video.

The coincidence detection circuit 15 determines whether the material of the video signal is a film material or a video material. That is, if the input video signal is a video material, exactly the same field does not appear once in five fields. Therefore, the coincidence detection circuit 15 determines that the interlaced scan image is not a film material due to lack of this periodicity.

The second material discriminating circuit 14 discriminates whether the video signal material is a film material or a video material based on the output of the field repeat signal generating circuit 9 and the output of the coincidence detecting circuit 15. As shown in FIG. 6, the second material discriminating circuit 14 discriminates a video material during a period in which no field repeat signal is generated and a period in which the coincidence detecting circuit does not discriminate the film material. The interlaced scanning video signal reproducing circuit 4 inputs the interlaced scanning video signal to the sequential scanning conversion circuit 17. Progressive scan conversion circuit 17
Recognizes from the output of the second material discriminating circuit 14 that the input digital video signal is a video material. Therefore, the progressive scan conversion circuit 17 performs the progressive scan video conversion on the assumption that the main video is a video material. That is, in the case of a video material, a progressively scanned video signal is generated using two pieces of field information, ie, field video information and a field located before it. At this time, the progressive scan conversion circuit 17 vertically interpolates the pixels having a small movement between the previous field and the previous field shown in FIG. For the pixel having a large motion in the above, the vertical interpolation data is generated from the upper and lower pixel data in the same field to obtain the output of the progressive scan conversion circuit shown in FIG. The converted video signal is converted into an analog signal by the D / A converter 12 and output from the progressive scanning video signal output terminal 13. A progressive scan video signal television monitor (not shown) is connected to the progressive scan video signal output terminal 13, so that the user can watch the video material video converted into the progressive scan video.

FIG. 8 is a signal schematic diagram showing a reproduction signal from a disc which is a film material according to the first embodiment of the present invention and a part of which is recorded as a video signal.

A part of the signal source of the film material may be recorded as a video signal in some cases. This is because, before the material is recorded on a video or the like at a stage before being recorded on the disc 1, when the work of returning the information once to the information of 24 frames is performed again, a part of the material remains as a video, and this is left as it is on the disc 1. It is in a state as recorded in.
That is, when generating the information to be recorded on the disc 1, it is detected from the material once recorded in the 60-field video that the data matches every 5 fields, and the frame of the original picture is recorded in the video. In order to detect a break and record it on a disc after returning it to 24 frames of information and recording it on a disc, if noise or the like occurs in the information on the video, it will not be possible to detect every 5 fields, and it will remain as video information. This is the case where the lost data is recorded as it is on the disc.

In FIG. 8, the n-th frame of the recording information, n + 1
The frame is recorded as a film material, the video information is recorded from the (n + 2) th frame to the (n + 6) th frame, and the n + 7th and subsequent frames are recorded as a film material.

Such a disk is referred to as Embodiment 1 of the present invention.
Of the n-th frame, n
The + 1st frame and the (n + 2) th frame are processed as film information, but the original field repeat signal is not detected in the even field of the (n + 3) th frame. However, the original film material is converted into 30 frames / 60 fields. Since the video signal is a synchronized video signal, the feature that the field information coincides once every five fields is preserved.

The coincidence detecting circuit 15 is provided in the third memory 16
And the output of the interlaced scanning video signal reproducing circuit 4 counts the number of pixels for which the data difference for each pixel in each field is equal to or smaller than a predetermined threshold value, and sets the counted value to a certain value. From the above, a field match is detected. This coincidence detection is shown in the field comparison information of FIG. 8, and thus becomes "1" every five fields. Therefore, when the coincidence detection circuit 15 detects that the field comparison information changes every five fields, it determines that the material of this video signal is a film.

The second material discriminating circuit 14 discriminates whether the video signal material is a film material or a video material based on the output of the field repeat signal generating circuit 9 and the output of the coincidence detecting circuit 15. As shown in FIG.
The material discriminating circuit 14 of this example determines that the period in which the coincidence detection circuit determines that the film material is the film material even if the transition from the period in which the field repeat signal is generated to the period in which the field repeat signal is not generated. Therefore, in FIG. 8, the second material discriminating circuit 19 also discriminates the film material from the (n + 2) th frame to the (n + 6) th frame. When the second material determination circuit 14 determines that the main video is a film material, the progressive scan conversion circuit 17 performs the progressive scan video conversion in accordance with the repeat cycle signal generated by the repeat cycle signal generation circuit 18. Do. That is, in the case of a film material, since an image of 720 horizontal dots and 480 vertical dots is originally divided into two fields of 720 horizontal dots and 240 vertical dots for each frame of each material, these may be synthesized again. . Therefore, the progressive scan conversion circuit 17 can detect the switching timing of the frame of the film signal used as the material of the input digital video signal based on the repeat period signal shown in FIG. In response to the field repeat signal, the progressive scan conversion circuit 17 stores the first field of the progressive scan conversion circuit input shown in FIG. 8 in the second memory 11 and then stores the second field in the second memory 11. By reading out both information at double speed for each line, the output of the progressive scan conversion circuit shown in FIG. 8 is obtained. The converted video signal is converted into an analog signal by the D / A converter 12 and output from the progressive scanning video signal output terminal 13. The progressive scan video signal output terminal 13 is connected to a progressive scan video signal television monitor (not shown) so that the user can view the film material video returned to the progressive scan video.

Therefore, in the video signal reproducing apparatus according to the first embodiment of the present invention, a video signal of a film material partially recorded as a video signal of 60 fields per second is suitable for a film material. A video signal reproducing device capable of performing the progressive scan conversion process is obtained.

(Embodiment 2) FIG. 9 is a block diagram showing a configuration of a video signal reproducing apparatus according to Embodiment 2 of the present invention. In FIG. 9, reference numeral 1 denotes a disk, which is a main video signal composed of either a video signal obtained by converting a film material video into an electrical signal or a video signal using a video signal as a material, and whether the main video signal is a film material or a video material. The discrimination flag shown is encoded in advance in a signal form suitable for recording, modulated, and recorded. 2 is a pickup, disc 1
Is converted into an electrical signal. Reference numeral 3 denotes a disk rotating device which rotates the disk 1 at a rotation speed suitable for reproduction. Reference numeral 4 denotes an interlaced scanning video signal reproducing circuit which demodulates and decodes the main video signal recorded on the disk 1 and outputs it as an interlaced scanning video signal. Reference numeral 5 denotes a first memory, which functions as a buffer memory when an interlaced video signal is reproduced. Reference numeral 6 denotes an NTSC encoder which converts an interlaced scanning video signal into an NTSC video format and outputs it. Reference numeral 7 denotes an interlaced scanning video output terminal from which an interlaced scanning video output reproduced from this terminal is output. Reference numeral 8 denotes a first material discrimination circuit which reads a discrimination flag recorded on the disc 1 from the output of the pickup 2. Reference numeral 9 denotes a field repeat signal generation circuit, which generates a field repeat signal when the interlaced scanning video signal reproducing circuit 4 converts the main video signal into an interlaced scanning video signal when the main video signal is a film material. 11 is a second memory, 1
It has the ability to store video signals for fields and is used for the operation of the progressive scan conversion circuit 17. Reference numeral 12 denotes a D / A converter, which converts the output of the sequential scan conversion circuit 17 into an analog value and outputs the analog value. Reference numeral 13 denotes a progressive scanning video output terminal from which a progressive scanning video signal is output to a video display device (not shown). Reference numeral 19 denotes a second material discriminating circuit which discriminates the type of the video signal recorded on the disc 1 from the output of the first material discriminating circuit 8 and the output of the second coincidence detecting circuit 15 and sequentially scan-converts the signal 17. Control. A coincidence detection circuit 15 compares the output of the interlaced scanning video signal reproduction circuit 4 with the output of the third memory 16. Reference numeral 16 denotes a third memory, which outputs the output of the interlaced scanning video signal reproducing circuit 4 with a delay of two fields. Reference numeral 17 denotes a progressive scan conversion circuit, which converts the output of the interlaced scan video signal reproducing circuit 4 into a progressive scan video signal and outputs it. Reference numeral 18 denotes a repeat cycle signal generation circuit which supplies a field repeat signal required for sequential scan conversion to the sequential scan conversion circuit 17 in accordance with the output of the second coincidence detection circuit 15.

The operation of the video signal reproducing apparatus according to the second embodiment of the present invention configured as described above will be further described.

FIG. 10 is a schematic diagram showing the structures of the interlaced scanning video signal and the progressive scanning video signal according to the second embodiment of the present invention, which are similar to FIGS. 2 and 18 described above. In the interlaced scanning video signal, an image of one field is formed in 1/60 second, and two images are combined to form an image of one frame. The number of vertical pixels in each of the two fields is 240, and the pixels are arranged so as to fill the space between the pixels in the vertical direction. One frame is 1 in the progressive scanning signal.
The number of vertical pixels is 480 at / 60 seconds.

In both cases, the vertical frequency is 1/60 second, and the number of horizontal scanning lines is twice as large as that of the interlaced scanning video signal. Therefore, the horizontal scanning frequency is about 15.75 KHz. On the other hand, it becomes about 31.5 KHz in the progressive scanning video signal.

FIG. 11 is a signal schematic diagram showing the structure of a video signal recorded on the disk 1 according to the second embodiment of the present invention. As shown in FIG. 11, the video signal recorded on the disc 1 has two forms. That is, a) shown in FIG. 11 is a film material, and in this case, the original material is 2
This is a film image composed of pictures of four frames, and is compressed as an image of 720 horizontal dots and 480 vertical dots for each frame and recorded on the disk 1. FIG. 11B shows a video material image. In this case, the original material is an interlaced scan image of 30 frames / 60 fields per second. Each frame is an image of 720 horizontal dots and 480 vertical dots, but since it is interlaced, each field becomes an image of 720 horizontal dots and 240 vertical dots, and is compressed and recorded on the disk 1. As shown in FIG.
A discrimination flag indicating whether the main video signal is a film material or a video material is recorded at the same time as the main video signal.

FIG. 12 is a signal schematic diagram showing a reproduced signal from a film material disk according to the second embodiment of the present invention.

When the material of the video signal recorded on the disk 1 is a film, as shown in FIG. 12, an image of 720 frames horizontally and 480 dots vertically is recorded at 24 frames per second, as shown in FIG. The interlaced scanning video signal reproducing circuit 4 reads a signal recorded on the disk 1 from an output of the pickup 2. The first material discriminating circuit 8 reads the discriminating flag from the output of the pickup 2 and discriminates the type of the main video signal, and sends the signal to the interlaced scanning video signal reproducing circuit 4, the field repeat signal generating circuit 9 and the second material discriminating circuit 19. Output. Based on the output of the first discriminating circuit 8, the interlaced scanning reproducing circuit 4 recognizes that the main video signal recorded on the disc 1 is a film material. As shown in FIG. 12, film material images are recorded on the disk 1 in the order of frame numbers..., N, n + 1, n + 2, n + 3,. The interlaced scanning video signal reproducing circuit 4 converts the film material signal recorded in this manner into interlaced scanning video and outputs it. This is because a television monitor is generally most often used as an image display device for viewing at home, and its display format is interlaced scanning, and the television monitor has a frame rate of 30 frames per second.
Since it is designed to handle 60 fields of moving images, the interlaced scanning video signal reproducing circuit 4 simultaneously operates at 24
The frame image is converted into an interlaced scan image of 30 frames / 60 fields per second and output. The interlaced scanning video signal reproducing circuit 4 divides each frame of the recording information into two interlaced scanning field images, odd and even, as shown in the interlaced scanning reproduced video signal in FIG. According to the field repeat signal which is repeated every five fields to be output, the first field is repeatedly displayed after the last field for each frame, so that a film image of 24 frames per second is interlaced at 30 frames per second / 60 fields. Convert to an image and output. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 4 reproduces an image.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this manner into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7 so that the user can watch the film material video converted into the interlaced scanning video.

Further, the interlaced scanning video signal reproducing circuit 4
Inputs the interlaced scan video signal to the progressive scan conversion circuit 17, the coincidence detection circuit 15, and the third memory 16.
The third memory 16 delays the input interlaced scanning video signal by two fields and outputs the delayed signal to the coincidence detection circuit 15.

FIG. 13 is a signal schematic diagram showing the operation of the coincidence detection circuit in the film material disk according to the second embodiment of the present invention.

The coincidence detection circuit 15 determines whether the video signal material is a film material or a video material. In other words, if the input video signal is a signal converted from film to video, the first field is repeated after the last field for each frame from the beginning, so the same is performed once every five fields. The field will appear. Therefore, the match detection circuit 15
Is different from the output of the memory 16 and the output of the interlaced scanning video signal reproducing circuit 4 for each pixel in each field.
If it is detected that the number of pixels that are equal to or less than a predetermined threshold value is equal to or greater than a certain value, and if a field match is detected,
This coincidence detection is shown in the field comparison information of FIG. 13, and thus becomes "1" every five fields. Therefore, when the coincidence detection circuit 15 detects that the field comparison information changes every five fields, it determines that the material of this video signal is a film.

FIG. 14 is a flowchart showing a method of determining a second material determining circuit according to the second embodiment of the present invention.

As shown in FIG. 14, the second material discriminating circuit 1
9 is an output of the first material discriminating circuit 8 and the coincidence detecting circuit 1
It is determined from the output of 5 whether the video signal material is a film material or a video material. That is, while the first material discriminating circuit 8 is discriminating the film material, the first material discriminating circuit 8 discriminates the film material from the film material. Even if the state transitions to the state in which the film material is detected, the coincidence detection circuit determines that the film material is present.

The repeat cycle signal generation circuit 18 generates a repeat cycle signal shown in FIG. 12 from the field comparison information for every five fields detected by the coincidence detection circuit 15. The field comparison information indicates the degree of coincidence between the field and the information two fields before each field to the last. For each field, the threshold value for discriminating between coincidence and non-coincidence, and the coincidence is detected depending on the video information. May not be performed, so even if the field comparison information is missing,
The role of a flywheel circuit for generating repeat information with a 5-field cycle is called a repeat cycle signal generation circuit 1
8

When the second material discriminating circuit 19 determines that the main video is a film material, the progressive scan conversion circuit 17 sequentially scans according to the repeat cycle signal generated by the repeat cycle signal generation circuit 18. Perform video conversion. That is,
In the case of film material, the original width is 72
0 dot, 480 dot vertical image is 720 horizontal dots, 2 vertical dots
Since it is divided into two fields of 40 dots,
This may be synthesized again. Therefore, the progressive scan conversion circuit 17 can detect the switching timing of the frame of the film signal used as the material of the input digital video signal based on the repeat cycle signal shown in FIG. In accordance with this repeat cycle signal, the progressive scan conversion circuit 17
After storing the first field of the input of the progressive scan conversion circuit shown in FIG. 12 in the second memory 11, the second field is stored in the second memory 11, and the information of both is read at a double speed line by line. The output of the progressive scan conversion circuit shown in FIG. 12 is obtained. The converted video signal is converted into an analog signal by the D / A converter 12 and output from the progressive scanning video signal output terminal 13. Progressive scanning video signal output terminal 1
A television monitor 3 for a progressive scanning video signal (not shown) is connected to 3 so that the user can watch the film material video returned to the progressive scanning video.

FIG. 15 is a signal schematic diagram showing a reproduced signal from a video material disc according to the second embodiment of the present invention.

When the material of the video signal recorded on the disk 1 is video, as shown in FIG. 15, the interlaced scanning image of 30 frames / 60 fields per second as recording information, each field is 720 dots horizontally and vertically An image of 240 dots is recorded. The interlaced scanning video signal reproducing circuit 4 reads a signal recorded on the disk 1 from an output of the pickup 2. The first material discriminating circuit 8 reads a discriminating flag from the output of the pickup 2, discriminates the type of the main video signal, and outputs it to the interlaced scanning video signal reproducing circuit 4 and the field repeat signal generating circuit 9. As shown in FIG. 15, on the disk 1, video material images are recorded in the order of frame numbers..., M, m + 1, m + 2, m + 3, m + 4,. The interlaced scanning video signal reproducing circuit 4 outputs the video material signal thus recorded as the interlaced scanning video signal as shown in the interlaced scanning reproduced video signal in FIG. The first memory 5 functions as a buffer memory when the interlaced scanning video signal reproducing circuit 4 reproduces an image.

The NTSC encoder 6 converts the interlaced scanning video signal reproduced in this manner into an NTSC standard video signal and outputs it to the interlaced scanning video output terminal 7. A television monitor (not shown) is connected to the interlaced scanning video output terminal 7, so that the user can watch the video material video converted into the interlaced scanning video.

The coincidence detection circuit 15 determines whether the video signal material is a film material or a video material. That is, if the input video signal is a video material, exactly the same field does not appear once in five fields. Therefore, the coincidence detection circuit 15 determines that the interlaced scan image is not a film material due to lack of this periodicity.

The second material discriminating circuit 19 discriminates, based on the output of the first material discriminating circuit 8 and the output of the coincidence detecting circuit 15, whether the video signal material is a film material or a video material. As shown in FIG. 14, the second material discriminating circuit 14 is a video material while the first material discriminating circuit 8 is discriminating it as a video material, while the match detecting circuit 15 is discriminating it as a video material. It is determined that there is. The interlaced scanning video signal reproducing circuit 4 inputs the interlaced video signal to the sequential scanning conversion circuit 17. The progressive scan conversion circuit 17
The output of the material discriminating circuit 19 recognizes that the input digital video signal is a video material. Therefore,
The progressive scan conversion circuit 17 performs progressive scan video conversion on the assumption that the main video is a video material. That is, in the case of a video material, a progressively scanned video signal is generated using two pieces of field information, ie, field video information and a field located before it. At this time, the progressive scan conversion circuit 17 vertically interpolates the pixels having a small motion between the previous field and the previous field shown in FIG. For the pixel having a large motion in the above, vertical interpolation data is generated from the upper and lower pixel data in the same field to obtain the output of the progressive scan conversion circuit shown in FIG. The converted video signal is converted into an analog signal by the D / A converter 12 and output from the progressive scanning video signal output terminal 13. A progressive scan video signal television monitor (not shown) is connected to the progressive scan video signal output terminal 13, so that the user can watch the video material video converted into the progressive scan video.

FIG. 16 is a signal schematic diagram showing a reproduction signal from a disc which is a film material according to the second embodiment of the present invention and a part of which is recorded as a video signal.

Even a signal source of a film material may be partially recorded as a video signal. This is because, before the material is recorded on a video or the like at a stage before being recorded on the disc 1, when the work of returning the information once to the information of 24 frames is performed again, a part of the material remains as a video, and this is left as it is on the disc 1. It is in a state as recorded in.
That is, when generating the information to be recorded on the disc 1, it is detected from the material once recorded in the 60-field video that the data matches every 5 fields, and the frame of the original picture is recorded in the video. In order to detect a break and record it on a disk after encoding it back to 24 frames of information, if noise or the like occurs in the information on the video, it is not possible to detect every 5 fields. This is a case where what remains as video information is recorded on a disk as it is.

In FIG. 16, the n-th frame of the recording information, n +
The first frame is recorded as a film material, and n + 2
The frames from the frame to the (n + 6) th frame are recorded as video information. Further, it is shown that the film after the (n + 7) th frame is recorded as a film material.

Such a disk is referred to as Embodiment 2 of the present invention.
Of the n-th frame, n
The + 1st frame and the (n + 2) th frame are processed as film information, but the original field repeat signal is not detected in the even field of the (n + 3) th frame. However, the original film material is converted into 30 frames / 60 fields. Since the video signal is a synchronized video signal, the feature that the field information coincides once every five fields is preserved.

The coincidence detecting circuit 15 is provided in the third memory 16
And the output of the interlaced scanning video signal reproducing circuit 4 counts the number of pixels for which the data difference for each pixel in each field is equal to or less than a predetermined threshold, and the counted value is equal to or greater than a certain set value. , A field match is detected.
This match detection is shown in the field comparison information of FIG. 16, and thus becomes "1" every five fields. Therefore, when the coincidence detection circuit 15 detects that the field comparison information changes every five fields, it determines that the material of this video signal is a film.

The second material discriminating circuit 19 determines whether the video signal material is a film material or a video material based on the output of the first material discriminating circuit 8 and the output of the coincidence detecting circuit 15. As shown in FIG. 14, even if the second material discriminating circuit 14 transitions from a state in which the first material discriminating circuit 8 discriminates a film material to a state in which the first material discriminating circuit 8 discriminates a video material, the coincidence detecting circuit During the period when 15 is determined to be a film material, it is determined to be a film material. Accordingly, in FIG. 16, the second material discriminating circuit 19 discriminates that the film material is also in the (n + 2) th frame to the (n + 6) th frame. When the second material determination circuit 19 determines that the main video is a film material, the progressive scan conversion circuit 17 performs the progressive scan video conversion in accordance with the repeat cycle signal generated by the repeat cycle signal generation circuit 18. Do. That is, in the case of a film material, an image of 720 dots horizontally and 480 dots vertically is originally 720 dots wide and 240 dots long vertically for each frame of each material.
Since it is divided into two fields of dots, it is sufficient to combine them again. Therefore, the progressive scan conversion circuit 17
By using the repeat cycle timing signal shown in FIG. 16, the switching timing of the frame of the film signal used as the input digital video signal can be detected. In response to the repeat cycle signal, the progressive scan conversion circuit 17 stores the first field of the input of the progressive scan conversion circuit shown in FIG. 16 in the second memory 11, and then stores the second field in the second memory 11. By reading out both information at a double speed line by line, an output of the progressive scan conversion circuit shown in FIG. 16 is obtained. The converted video signal is converted into an analog signal by the D / A converter 12 and output from the progressive scanning video signal output terminal 13. The progressive scan video signal output terminal 13 is connected to a progressive scan video signal television monitor (not shown) so that the user can view the film material video returned to the progressive scan video.

Therefore, in the video signal reproducing apparatus according to the second embodiment of the present invention, a video signal of a film material partially recorded as a video signal of 60 fields per second can be properly adapted to the film material. A video signal reproducing device capable of performing the progressive scan conversion process is obtained.

In the above description, the first memory, the second memory, and the third memory are described independently for functional description. However, they can all be realized by a semiconductor memory, and all of them can be realized by a circuit configuration. It is easy to realize any two with one semiconductor memory.

Further, in the above-described embodiment, the description has been made of the hardware configuration of the electronic circuit which can easily explain the signal flow. However, the present invention is not necessarily limited to this. The same operation and effect can be obtained even if a part is constituted by software and introduced into a microprocessor.

Further, in the above-described embodiment, the video signal reproducing apparatus has been described as an example in which the video signal reproducing apparatus is constituted by a disk device for reproducing a main video signal and transfer information from a disk such as a DVD.
Similarly, other video signal reproducing devices for reproducing (or demodulating) the main video signal and the transfer signal, such as a tape device, a hard disk device, a broadcast receiver for a satellite broadcast, a terrestrial broadcast, a cable television broadcast, and the like, are similarly implemented. It is possible. Of course, it goes without saying that even if the disk, tape, or broadcast wave also has audio information other than the main video information and transfer information, there is no problem.

In the above embodiment, if only the progressive scan video output is limited, the NTSC encoder 6 and the interlaced scan video output terminal 7 are not necessarily required. However, in this case, it is not possible to input and record in a recording apparatus using only the interlaced scanning method such as the video format of the so-called VHS method.

[0082]

As described above, according to the present invention, the type of a material is discriminated by a discrimination flag for discriminating the type of a field repeat signal or a main video signal generated when a film material is converted into an interlaced video signal. Means and means for judging whether the material signal is a film or a video using the video signal once converted to the interlaced scanning video signal, and by judging the material based on the judgment result of both means. Thus, a video signal reproducing apparatus which can perform progressive scan conversion processing suitable for a film material even for a video signal of a film material partially recorded as a video signal of 60 fields per second can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a video signal reproducing device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing the structures of an interlaced scanning video signal and a progressive scanning video signal.

FIG. 3 is a signal schematic diagram showing a structure of a video signal recorded on the disk 1;

FIG. 4 is a signal schematic diagram showing a reproduction signal on the film material disk.

FIG. 5 is a schematic signal diagram showing the operation of a coincidence detection circuit in the film material disk.

FIG. 6 is a flowchart showing a determination method of a second material determination circuit.

FIG. 7 is a signal schematic diagram showing a reproduction signal on the video material disc.

FIG. 8 is a signal schematic diagram showing a reproduction signal from a disc in which a part is recorded as a video signal in a film material.

FIG. 9 is a block diagram showing a configuration of a video signal reproducing device according to a second embodiment of the present invention.

FIG. 10 is a schematic diagram showing the structures of an interlaced scanning video signal and a progressive scanning video signal.

FIG. 11 is a signal schematic diagram showing a structure of a video signal recorded on the disc 1;

FIG. 12 is a signal schematic diagram showing a reproduction signal on the film material disk.

FIG. 13 is a signal schematic diagram showing the operation of the coincidence detection circuit in the film material disk.

FIG. 14 is a flowchart showing a determination method of the second material determination circuit.

FIG. 15 is a signal schematic diagram showing a reproduced signal on the video material disc.

FIG. 16 is a signal schematic diagram showing a reproduced signal from a disc in which a part is recorded as a video signal in a film material.

FIG. 17 is a block diagram showing a configuration of a conventional video signal reproducing device.

FIG. 18 is a schematic diagram showing the structures of an interlaced scanning video signal and a progressive scanning video signal.

FIG. 19 is a signal schematic diagram showing the structure of a video signal recorded on the disc 1;

FIG. 20 is a signal schematic diagram showing a reproduction signal on the film material disk.

FIG. 21 is a signal schematic diagram showing a reproduction signal on the video material disc.

FIG. 22 is a signal schematic diagram showing a reproduction signal on a disc in which a part is recorded as a video signal in a film material.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 disc 2 pickup 3 disc rotating device 4 interlaced scanning video signal reproducing circuit 5 first memory 6 NTSC encoder 7 interlaced scanning video output terminal 8 first material discriminating circuit 9 field repeat signal generating circuit 10 sequential scanning converting circuit 11 second Memory 12 D / A converter 13 progressive scanning video output terminal 14 second material discriminating circuit 15 coincidence detecting circuit 16 third memory 17 progressive scanning converting circuit 18 repeat cycle signal generating circuit 19 second material discriminating circuit

Claims (3)

[Claims] 1. A main video signal comprising a first type of video signal obtained by converting a film material video into an electric signal or a second type of video signal using a video signal as a material, and the main video signal Is a video signal reproducing apparatus that reproduces the main video signal from transfer information in which a determination flag for determining whether the video signal is the first type video signal or the second type video signal is transferred. First timing signal generating means for outputting a first timing signal indicating a field to be repeatedly output when the video signal is the first type of video signal; First material discriminating means for discriminating between one type of video signal and the second type of video signal, and the first material discriminating means determines that the main video signal is the first type of video signal Determined In this case, the main video signal is
If the first material discriminating means determines that the main video signal is the second type of video signal, the signal is converted into a 60-field interlaced scanning video signal in accordance with the output of the timing signal generating means. An interlaced scanning video signal reproducing unit that outputs the main video signal as it is, a field memory that stores the interlaced scanning video signal reproducing unit output for two fields, and a difference between the interlaced scanning video signal reproducing unit output and the field memory output. Detecting whether the main video signal is the first type of video signal from the output of the first material discriminating means or the output of the first timing signal generating means and the output of the field difference detecting means; A second material discriminating means for discriminating whether the signal is a second type of video signal, and wherein the second material discriminating means determines whether the main video signal A second timing signal for generating a second timing signal indicating a break between frames of the film material in the interlaced scanning video signal by the output of the field difference detecting means when it is determined that the video signal is the first type of video signal; And a method of generating an insertion scanning signal according to the output of the second material discriminating means, and the second material discriminating means converts the main video signal into the first kind of video signal. If it is determined that there is a scanning scan converting means for combining two fields of the interlaced scanning video signal of 60 fields per second in accordance with the second timing signal to obtain a progressive scanning video signal. Video signal reproducing device. 2. The second material discriminating means, when the output of the first material discriminating means or the state of the timing generating means is the state of the first kind of video signal, is the first kind of video signal. And determining whether the output of the first material determining means or the state of the timing generating means transitions from the state of the first type of video signal to the state of the second type of video signal. 2. The video signal reproducing apparatus according to claim 1, wherein when the video signal is detected as a field match at a specific period, the video signal is determined to be the first type of video signal. 3. The second material discriminating means changes the output of the first material discriminating means or the state of the timing generating means from the state of the first kind of video signal to the state of the second kind of video signal. 3. The video signal of claim 1, wherein the field difference detection means determines that the video signal is the first type of video signal if the field difference is detected every five fields.
The video signal reproducing device according to any one of the preceding claims.