JP2001157112A - Telecine device, video signal processor and video signal transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video signal processor capable of processing a talecine signal in which 2 to 3 field arrangement is not maintained. SOLUTION: This video signal processor 50 has a telecine signal processing part 72 and an MPEG encoder 70. A flag detecting part 62 can detect a flag superimposed on the telecine signal. A field interval detecting part 64 detects a field interval between duplicate fields on the basis of the flag. An unneeded field deciding part 66 defines an unneeded field to be eliminated, on the basis of the detected field interval. The part 66 desirably specifies the unneeded field so that the duplicate fields can be arrangement every five fields, in the case of eliminating the unneeded field from a telecine signal. An unneeded field eliminating part 68a eliminates the specified unneeded field, and a duplicate field eliminating part 68b eliminates the duplicate fields. An MPEG processing part 74 applies MPEG compression coding to the telecine signal, from which the duplicate fields and the unneeded field are eliminated and generates an MPEG television signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal processing apparatus for processing a telecine signal, and more particularly to a video signal processing apparatus for compressing a telecine signal by MPEG.

[0002]

2. Description of the Related Art In recent years, digital transmission techniques for compressing and encoding image signals and transmitting the signals as digital signals have been actively developed. In order to compress a video signal to be transmitted, an MPEG compression technique is used in digital TV broadcasting and the like, and attempts have been made to reduce a transmission band.

At present, standard television broadcasting (SDTV)
525 / 60I (24P) of theater film video processed for broadcast)
There are many materials. This 525 / 60I (24P) material is
It cannot be streamed directly to Progressive broadcasts. Since it is costly and time-consuming to recreate a material for Progressive (forward scanning) broadcasting from the original film video, it is desirable to use 525 / 60I (24P) material and be able to broadcast.

The number of frames (frames) of a film image is 2
The frame rate is 4 frames / sec, and the number of frames of the TV video for SDTV broadcasting is 30 frames / sec (60 fields / sec). One frame of an interlaced (interlaced scanning) television image is composed of two fields, an odd field and an even field. The odd field is a field in which only odd-numbered scanning lines are scanned, and the even field is a field in which only even-numbered scanning lines are scanned. In order to display a film image on a television, two frames of the film image are transferred to a television
Need to be converted to a field. An image conversion device called a telecine device performs a process of converting a film video to a television video.

FIG. 1 shows an example of an original film image and a telecine image obtained by telecine-converting the film image.
As shown, frame A in the film image is converted into fields A1 and A2, and frame B is converted into fields B1 and A2.
1, B2, B1 and the frame C
2, C1, and the frame D is divided into fields D2, D
1, D2. When describing a field, a subscript “1” indicates that the field is an odd field, and a subscript “2” indicates that the field is an even field. Odd and even fields are arranged alternately. This conversion method is called a 2-3 pull-down method, in which two fields (A1, A2) and three fields (B1, B2, B1) and two fields (C2, C) of a television signal are obtained from consecutive frames in a film image.
1) Three fields (D2, D1, D2) are generated. Fields are formed to maintain this 2-3 arrangement.

When one frame is represented by three fields, three
The first and last fields in a field overlap. In FIG. 1, two fields B1 and D2 exist in the telecine video.
The last field identical to the first field in the three fields is called a duplicate field.

In order to reduce the amount of transmission data, the video signal processing apparatus desirably performs MPEG compression encoding of only the telecine signal from which duplicate fields have been deleted.
A parameter representing this in the PEG2 standard is also provided. The conventional video signal processing apparatus predicts the position of the duplicated field based on the 2-3 arrangement of the field formed by the 2-3 pull-down method, and deletes the duplicated field. According to the 2-3 pull-down method, the overlapping fields are regularly arranged every five fields. Therefore, the conventional video signal processing apparatus uses the regularity to replace the fields arranged every five fields with the overlapping fields. And removed the field. The function of the video signal processing device to remove duplicate fields is inverse 2
It is called a -3 pull-down conversion (deterecine) function. After deleting the field, the video signal processing device performs MPEG compression encoding on the telecine signal from which the field has been deleted.

[0008]

When a film image is broadcast on a television, some scenes may be cut by a movie director or the like due to time constraints. In this scene cut, frame editing may be performed on the basis of a telecine video. Therefore, in the scene cut telecine signal, the field cutout is performed.
Three sequences may not be maintained. When a conventional video signal processing device processes a telecine signal in which a 2-3 array is broken, a field that is not a duplicated field is regarded as a duplicated field and is subjected to MPEG compression encoding. In the MPEG television signal generated in this way, fields in different frames are combined.

[0009] The receiver cannot reproduce the original film image from the MPEG-compressed television signal. Therefore, the present invention provides a video signal processing that can generate an MPEG television signal that enables a receiver to reproduce an original film video even when the 2-3 arrangement of fields in a telecine video is broken. Providing a device is an issue to be solved. In addition, the present invention provides a video capable of realizing high-definition TV broadcasting using the same band as the digital transmission band of the current SDTV broadcasting in order to effectively use 525 / 60I (24P) material already distributed. It is an object to provide a signal transmission system.

[0010] Conventionally, there is a video signal processing apparatus for determining a change in motion of an image or a change in luminance and chrominance. With this conventional video signal processing device, it is difficult to detect duplicate fields from telecine materials such as animations and still images that change only about 8 to 10 frames per second, and subtitles inserted with 60I signals after telecine. . Therefore, an object of the present invention is to provide a video signal processing device capable of easily detecting an overlapping field in a telecine signal.

In some cases, for example, a commercial image signal, which is an interlaced image of 60 fields / second, is inserted into a video signal telecine by the 2-3 pull-down system. At this time, the video signal processing device
It is not necessary to perform inverse 2-3 pull-down conversion (de-telecine) on a field / second image signal, but it is necessary to perform reverse 2-3 pull-down conversion on a telecine video signal. The conventional video signal processing device cannot distinguish between a telecine video signal and an interlaced image signal, so that a material in which a telecine video signal and an interlaced image signal are mixed is subjected to MPE.
When performing G compression, it was necessary to manually turn off the detelecine function of the MPEG processing unit so as not to detelecine the interlaced image signal. Therefore, there is a problem that it takes time and effort to process such mixed materials.

As described above, in order to perform MPEG compression encoding of a mixed signal of a telecine video signal and a 60-field / second interlaced video signal, the video signal processing apparatus performs inverse 2-3 pull-down conversion (deterecine). Function
It needs to be turned on / off according to the type of image signal. If the interlaced image signal can be handled like a telecine signal, the video signal processing device does not need to turn on / off the de-telecine function when compressing the telecine video signal and the interlaced image signal. That is, if the video signal processing device can uniformly handle the mixed signal as a telecine signal, all the image signals should be de-telecine and then MPEG-compressed. At this time, the work of switching the telecine function is not required, so that the telecine video signal and the interlaced video signal can be efficiently processed. Accordingly, an object of the present invention is to provide a video signal processing device capable of handling a predetermined interlaced image signal as a telecine signal.

In the future, high-level sources such as 1080 / 60I, 720 / 60P, and 525 / 60P will be supplied by HDTV broadcasting. In HDTV broadcasting, 60P is 6
It means a progressive image of 0 frames / sec. Current NTSC receivers (STBs) cannot decode these sources. The present invention relates to 525 / 60I, 525
Provided is a video signal processing apparatus which supplies mixed materials of / 60I (24P) and 525 / 60I (30P) by SDTV broadcasting and can reproduce the mixed materials as 525 / 60P in a current SDTV receiver. These are issues to be solved.

Accordingly, an object of the present invention is to provide a video signal processing device which can solve the above-mentioned problems. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous embodiments of the present invention.

[0015]

According to a first aspect of the present invention, there is provided a telecine apparatus for generating a telecine signal obtained by converting a film image into a television signal by a 2-3 pull-down method. I do. This telecine apparatus is characterized in that when there is an identical duplicate field as one field, a flag indicating the duplicate field is superimposed on a predetermined portion in a telecine signal expressing the duplicate field.

A second embodiment of the present invention is a telecine signal obtained by converting a film image into a television signal having a field structure by a 2-3 pull-down system, and indicates that it is an overlapping field which overlaps with one field. A video signal processing device is provided for processing a telecine signal in which a flag is superimposed on a predetermined position in a telecine signal representing an overlap field. The video signal processing apparatus includes: a flag detection unit that detects a flag; a duplicate field deletion unit that deletes a duplicate field in which the flag is detected;
And an MPEG processing unit for generating an EG television signal.

The video signal processing apparatus further includes a field interval detecting section for detecting a field interval between the overlapped fields on which the flags are superimposed, and an unnecessary field determination for determining an unnecessary field to be deleted based on the detected field interval. And an unnecessary field deletion unit that deletes an unnecessary field determined by the unnecessary field determination unit. The MPEG processing unit converts the telecine signal from which duplicate fields and unnecessary fields have been
The MPEG television signal can be generated by performing G compression encoding. The field interval detector may detect the field interval based on the flag detected by the flag detector.

The video signal processing device may include a memory for storing a telecine signal from which unnecessary fields have been deleted. The duplicate field deletion unit can delete a duplicate field of the telecine signal stored in the memory. Preferably, the memory has a capacity capable of storing the entire telecine signal from which unnecessary fields have been deleted.
Further, the video signal processing device may include a small-capacity memory for storing a telecine signal output from the unnecessary field deleting unit. In this case, it is preferable that the telecine signal is output from the memory to the duplicated field deletion unit after a predetermined time has elapsed from the input of the telecine signal to the memory.

When compressing and encoding a telecine signal by frame prediction, the MPEG processing unit sets the value of a progressive frame bit, which is one of the MPEG encoded data, to 1 in a frame having no overlapping field. preferable.

When the 2-3 arrangement of the fields formed by the 2-3 pull-down method in the telecine signal is not maintained, it is preferable that the unnecessary field determining section determines an even number of unnecessary fields to be deleted. In addition, it is preferable that the unnecessary field determination unit determines the unnecessary fields so that, when the unnecessary fields are removed from the telecine signal, the overlapping fields are arranged every five fields. Further, it is preferable that the unnecessary field determining unit determines an even number of unnecessary fields that are continuous in time series. When a part of the fields in the telecine signal is deleted, and the 2-3 arrangement of the fields is broken, the unnecessary field determining unit determines, from the position where the part of the fields are deleted, the unnecessary fields that are continuous in time series. Is preferably determined.

In a third embodiment of the present invention, 24 frames /
Provided is a video signal processing device that incorporates a first image signal having a frequency different from that of a film video into a telecine signal obtained by converting a film video of seconds into a television signal by a 2-3 pull-down method. The video signal processing device converts the first image signal into 30
An image conversion unit that converts a second image signal, which is a progressive image at a frame / second, into an image, and an MPEG processing unit that performs MPEG compression encoding of the telecine signal and the second image signal. When performing MPEG compression encoding on the second image signal, the MPEG processing unit sets the value of a repeat field first bit, which is one of the MPEG encoded data, to 0, and sets the progressive field, which is one of the MPEG encoded data, to progressive. -The value of the frame bit is set to 1.
The first image signal may be a progressive image of 60 frames / second.

In a fourth embodiment of the present invention, 24 frames /
Provided is a video signal processing apparatus that incorporates a 60-field / second interlaced still image signal into a telecine signal obtained by converting a second film video into a television signal by a 2-3 pull-down method. The video signal processing device includes a field deletion unit that deletes a field of a still image signal every five fields, and an MPEG processing unit that performs MPEG compression encoding of a still image signal whose field has been deleted and a telecine signal. The MPEG processing unit has a frame structure including a first field identical to the deleted field existing two places before the deleted deleted field in the still image signal, and a second field existing between the first field and the deleted field. When performing the MPEG compression encoding by converting the data into a field, the value of a repeat field first bit, which is one of the MPEG encoded data, is set to 1. The video signal processing device may further include a flag superimposing unit that superimposes a flag every five fields in the still image signal, and the field deleting unit may delete the field on which the flag is superimposed.

According to a fifth aspect of the present invention, there is provided a video signal transmission system for transmitting a film image by MPEG compression encoding, and generating a telecine signal by converting the film image into a television signal by a 2-3 pull-down system. A telecine device that superimposes a flag indicating that the field is a duplicated field at a predetermined position in a telecine signal representing the same duplicated field as one field, and an MPEG television signal obtained by compressing and encoding the telecine signal. There is provided a video signal transmission system including a video signal transmission device for transmitting and a receiver for receiving an MPEG television signal. A video signal transmission device, a flag detection unit that detects a flag superimposed on the telecine signal, a field interval detection unit that detects a field interval between the overlapped fields where the flag is superimposed, and based on the detected field interval. An unnecessary field determining unit for determining an unnecessary field to be deleted, an unnecessary field deleting unit for deleting an unnecessary field, a duplicate field deleting unit for deleting a duplicate field, and an MPEG compression of a telecine signal from which the duplicate field and the unnecessary field are deleted. It is characterized by having an MPEG processing unit for generating an MPEG television signal by encoding, and a transmitting unit for transmitting the MPEG television signal to a receiver.

A sixth embodiment of the present invention is a telecine signal obtained by converting a film image into a television signal having a field structure by a 2-3 pull-down method, and indicates that it is an overlapping field which overlaps with one field. A video signal processing method is provided for processing a telecine signal in which a flag is superimposed on a predetermined position in a telecine signal representing an overlap field. The video signal processing method includes a step of detecting a flag, a step of detecting a field interval between overlapping fields on which the flag is superimposed, a step of determining an unnecessary field to be deleted based on the detected field interval, The method includes a step of deleting a field, a step of deleting a duplicated field, and a step of MPEG-compressing and encoding a telecine signal from which a duplicated field and an unnecessary field have been deleted.

Note that the above summary of the present invention does not list all of the necessary features of the present invention, and sub-combinations of these features may also constitute the present invention.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described through embodiments of the present invention. However, the following embodiments do not limit the invention according to the claims, and are described in the embodiments. Not all combinations of features are essential to the solution of the invention.

FIG. 2 is a block diagram showing an embodiment of a video signal transmission system 10 according to the present invention, which can transmit a film video after compressing it by MPEG. The video signal transmission system 10 includes a telecine device 20, a video signal transmission device 30, and a receiver 40. The video signal transmitting device 30 includes a video signal processing device 50 and a transmitting unit 60.
And In the present invention, the video signal processing device 50
Is an MPEG profile MP @ ML (Main Profile at
This is a processing device for SDTV broadcasting using (Main Level). However, the video signal processing device 50 can perform the same processing using another profile.

The telecine device 20 converts the film image into
It is possible to generate a telecine signal converted into a television signal by the three pull-down method. As will be described in detail with reference to FIG. 3, the telecine device 20 according to the present embodiment superimposes a flag indicating a duplicate field on a predetermined position in a telecine signal representing the same duplicate field as one field. It has a function to do.

The video signal transmitting apparatus 30 transmits an MPEG television signal obtained by encoding a telecine signal by MPEG. In this embodiment, the video signal processing device 50 generates an MPEG television signal in which the telecine signal is MPEG-compressed and encoded based on the superimposed flag,
Transmits an MPEG television signal. For example, in satellite broadcasting, an MPEG television signal is transmitted to a user's receiver 40 via a communication (broadcast) satellite. In terrestrial digital broadcasting, MPEG television signals are
In the cable television broadcasting, the signal is transmitted to the receiver 40 through a cable, passing through the atmosphere.

[0030] The receiver 40 receives and decodes the MPEG television signal. In digital broadcasting systems,
The receiver 40 usually has a decoder called STB (Set Top Box). As the type of STB, for example,
60 interlace S for decoding a received MPEG television signal into an interlaced image of 60 fields / second
60 progressive ST for decoding a TB or MPEG television signal into a progressive image of 60 frames / sec.
B and the like.

FIG. 3 is a block diagram of the telecine device 20 according to one embodiment of the present invention. Telecine device 20
Has a telecine unit 22 and a flag superimposing unit 24.
The telecine unit 22 generates a telecine signal obtained by converting a film image into a television signal having a field structure by a 2-3 pull-down method.

The flag superimposing section 24 superimposes a flag indicating that the field is a duplicate field at a predetermined position in a telecine signal representing the duplicate field. For example, the flag superimposing unit 24 may superimpose the flag on the vertical blanking period of the overlapping field. Specifically, during the vertical retrace period, the first
A flag may be inserted into the seventh or eighteenth free scan line or the like.

FIG. 4 shows a telecine signal on which a flag is superimposed by the flag superimposing section 24. In the figure, "2-1"
Is the field name that identifies the field type,
This means that this is the first field when one frame (frame) of a film image is represented by two fields.
"2-2" means the second field, and "3-1" means the first field when one frame of the film image is represented by three fields. "3-2" means the second field, and "3-3" means the third field, so the 3-3 field has the same duplication as the 3-1 field. 4, a flag is superimposed on B1 and D2 of the 3-3 field as shown in Fig. 4. In this embodiment, the telecine signal on which the flag is superimposed is processed by the video signal processing device 50. .

When a new telecine video signal is created, a flag may be superimposed on the telecine material using the telecine device 20 shown in FIG. 3. However, a flag is superimposed on the overlapped field on the existing telecine material. Not. Therefore, in order to process the existing telecine material by the video signal processing device 50 according to the present embodiment, it is preferable to prepare a flag superimposing device (not shown) for superimposing a flag on the telecine material. By preparing the flag superimposing device, the flag can be superimposed on the existing telecine material, and the resources of the existing telecine material can be effectively used.

FIG. 5 shows a video signal processing apparatus 5 according to the present invention.
FIG. 1 is a block diagram showing a first embodiment of the present invention. The video signal processing device 50 can process a telecine signal on which a flag indicating a duplicate field is superimposed.
In this embodiment, the video signal processing device 50 includes a telecine signal processing unit 72 and an MPEG encoder 70. The telecine signal processing unit 72 includes a flag detection unit 62,
Field interval detector 64, unnecessary field determiner 6
6, and an unnecessary field deleting unit 68a. MPE
The G encoder 70 has a duplicate field deletion unit 68b and an MPEG processing unit 74. The unnecessary field deletion unit 68a and the duplicate field deletion unit 68b function as a field deletion unit that deletes a field in the telecine signal.

The flag detector 62 can detect a flag superimposed on the telecine signal. Since the flag is superimposed on the overlapping field in the telecine signal, the video signal processing device 50 can easily specify which field is the overlapping field. In particular, when the 2-3 arrangement of the fields is broken due to editing of a telecine video or the like, in the present embodiment, the flag is superimposed on the overlapping field itself, so that the video signal processing device 50 can easily set the overlapping field. It becomes possible to specify.

The field interval detector 64 detects a field interval between overlapping fields. The field interval detecting unit 64 determines how many fields exist between the overlapping fields, that is, how many overlapping fields are arranged based on the flag detected by the flag detecting unit 62. Can be. Further, the field interval detection unit 64 determines that the two fields are the same, specifies a duplicate field,
A field interval between overlapping fields may be detected.

The unnecessary field determining unit 66 determines an unnecessary field to be deleted based on the detected field interval. The unnecessary field determining unit 66 determines an even number of fields as unnecessary fields. As described above, the telecine signal is later subjected to MPEG compression encoding,
The information is transmitted to the receiver 40, and the receiver 40 needs the information of the odd field and the even field to reproduce the video. For this reason, the telecine signal must be in a state where odd fields and even fields are alternately arranged when MPEG compression encoding is performed. Therefore, by defining the even number of fields as unnecessary fields, it is possible to generate a telecine signal in which odd and even fields are alternately arranged without breaking the alternating arrangement of odd and even fields. Become.

It is desirable that the unnecessary field determining section 66 determines unnecessary fields so that, when unnecessary fields are removed from the telecine signal, duplicate fields are arranged every five fields. That is, it is preferable that the unnecessary field determination unit 66 determines the unnecessary fields so that the fields in the telecine signal are arranged in a 2-3 arrangement.
After deleting unnecessary fields in the telecine signal,
If duplicate fields are placed every 5 fields,
The MPEG processing unit 74 appropriately converts the telecine signal to MP
EG compression encoding is possible. Specifically, when a telecine signal having a 2-3 array of fields is MPEG-compressed and encoded, information on the number of fields (2 or 3) representing one frame is incorporated into the MPEG television signal. Therefore, the receiver 40 can appropriately reproduce the MPEG television signal.

It is desirable that the unnecessary field determining section 66 determines an even number of unnecessary fields that are continuous in time series. By defining continuous fields as unnecessary fields, the processing can be simplified and the omission of image information can be reduced. When some fields in the telecine signal have been deleted by editing such as scene cut, the unnecessary field determination unit 66 determines the time-series continuous unnecessary fields from the location where the partial fields have been deleted. It is desirable.

The unnecessary field deleting section 68a deletes a predetermined unnecessary field. Duplicate field deletion unit 6
8b removes duplicate fields. The MPEG encoder 70 may include a flag detection unit that detects a flag at a stage preceding the duplicated field deletion unit 68b. At this time, the overlap field is specified by the flag detection unit based on the flag superimposed on the telecine signal. MPE
The G processing unit 74 performs MPEG compression encoding on the telecine signal from which the duplicate field and the unnecessary field have been deleted,
Generate an MPEG television signal. Details of the MPEG processing unit 74 will be described later.

FIG. 6 is an explanatory diagram for explaining the relationship between the telecine signal before editing and the telecine signal after editing. In the drawing, A, B, C... Indicate each frame (frame) of the original film image, and the suffix “1” indicates an odd field, and the suffix “2” indicates an even field. For example, “A1” means an odd field of the film image A.

In the telecine signal before editing, a flag is set in the overlap field (3-3 field). As shown, the field interval between the overlapping fields is always 4, and the 2-3 arrangement of the fields is maintained.

The fields are 2-1 2-2 3-1
When divided into five types of 3-2 and 3-3, there are 25 combinations of 5 × 5 edit start fields and edit end fields that are edited by editing such as scene cut. For example, considering a combination of editing and deleting from the 2-1 field, from the editing start field 2-1:
Editing end fields 2-1, 2-2, 3-1 and 3-2,
Since there are five types of editing modes up to 3-3, and there are similarly five types of editing modes for other fields, a total of 25 types of editing modes exist. Editing is performed in frame units, not in field units.

The case where a predetermined field is edited and deleted from the unedited telecine signal will be described below with reference to FIG. The duplicated field (3-3 field) for which a flag has been set will be expressed in parentheses in this specification. For example, a duplicate field of B1 is expressed as (B1). In FIG.
As the edited telecine signal, 25 kinds of editing examples are disclosed.

As an example in which fields 2-1 to 3-2 have been edited and deleted, for example, a case where fields A1 to B2 have been deleted will be described. This editing example is shown at the top of the edited telecine signal in FIG. As described above, since editing is performed in units of frames, there is no editing that deletes from A1 to D1, which is the first field of the frame. However, deletion from A1 to F2 is possible because it is editing in frame units.

The field interval detector 64 detects a field interval between overlapping fields. A duplicate field (Z2) existing before the edited and deleted field "A1 to B2" and a duplicate field (B1) existing after the field "A1 to B2"
As shown in the figure, the 2-3 arrangement of the fields is not maintained. At this time, the field interval between (Z2) and (B1) is 0.

The telecine material corresponds to the field 2-3.
To have an array, a duplicate field (B
It is sufficient to delete six fields from 1) to (D2). When these six fields are deleted, the field arrangement of this telecine material becomes: Z1 (Z2) E
1 E2 F1 F2 (F1)..., And duplicate fields are arranged every five fields. Telecine material that retains a 2-3 arrangement of fields can be appropriately converted to MPEG television signals. As described above, the unnecessary field determination unit 66 sets the field (B
Six fields from 1) to (D2) can be determined as unnecessary fields.

As described above, the unnecessary field determination unit 6
No. 6 desirably defines unnecessary fields so that the telecine signal can have a 2-3 arrangement of fields from the place where the fields are edited and deleted. Therefore, in the present embodiment, the unnecessary field determination unit 66
However, the unnecessary field is defined with the field (B1) as a starting point. Although this method is simple and easy to implement, the start point of the unnecessary field may be determined by another method.

Next, as an example in which fields 2-1 to 3-1 are edited and deleted, for example, A
A case where fields 1 to D2 are deleted will be described. This editing example is shown second from the top of the edited telecine signal in FIG. The field interval detection unit 64 detects a field interval between overlapping fields. Edited and deleted fields "A1 to D2"
As shown in the figure, the 2-3 arrangement of the fields is not maintained between the overlapping field (Z2) existing before and the overlapping field (D2) existing after. At this time, the field interval between (Z2) and (D2) is 1.

The telecine material corresponds to the field 2-3.
In order to have an array, two fields from field D1 to (D2) may be deleted. When these two fields are deleted, the field arrangement of this telecine material becomes: Z1 (Z2) E1 E2
F1 F2 (F1)..., And duplicate fields are arranged every five fields. in this way,
The unnecessary field determination unit 66 determines from the fields D1 to (D
The two fields up to 2) can be determined as unnecessary fields. In the present embodiment, the unnecessary field determination unit 66 determines the unnecessary field as the start point of the field D1, but may determine the start point of the unnecessary field by another method.

As an example in which fields 2-2 to 2-1 are edited and deleted, a case where fields C1 to G2 are deleted will be described.
This editing example is shown at the twelfth position from the top of the edited telecine signal in FIG. Field interval detector 6
4 detects a field interval between overlapping fields. As shown in the figure, the field interval between the duplicated field (B1) existing before the edited and deleted field "C1 to G2" and the duplicated field (H2) existing after the field is maintained at 4.

At this time, the unnecessary field determination unit 66
It is not always necessary to determine an unnecessary field for this telecine signal. This is because the field interval of the duplicated field is kept at 4, so that the MPEG processing unit 74
This is because this telecine signal can be MPEG-compressed and encoded. In order to simplify the processing and increase the processing speed, when the field interval is 4, the unnecessary field determination unit 66 may operate so as not to unnecessarily determine the unnecessary fields. However, fields C2 and G
If it is not preferable to combine 1s, 10 fields from (B1) may be determined as unnecessary fields and the unnecessary fields may be deleted.

Based on the field interval detected by the field interval detecting section 64, the unnecessary field determining section 66
May determine the unnecessary fields according to the following algorithm. Here, a field existing immediately after the edited and deleted field is called a start point field.

When the field interval is 0, the unnecessary field determining unit 66 determines six fields starting from the start point field as unnecessary fields. When the field interval is 1, the unnecessary field determination unit 66 determines two fields starting from the start point field as unnecessary fields. When the field interval is 2, the unnecessary field determination unit 66
Defines eight fields starting from the start point field as unnecessary fields. When the field interval is 3, the unnecessary field determination unit 66 determines that the
Fields are defined as unnecessary fields. When the field interval is 4, the unnecessary field determination unit 66 does not determine an unnecessary field.

When the field interval is 5, the unnecessary field determination unit 66 determines the six fields starting from the start point field as unnecessary fields. When the field interval is 6, the unnecessary field determination unit 66 determines two fields starting from the start point field as unnecessary fields. When the field interval is 7, the unnecessary field determination unit 66
Defines eight fields starting from the start point field as unnecessary fields. When the field interval is 8, the unnecessary field determination unit 66 sets the 4
Fields are defined as unnecessary fields.

As described above, the unnecessary field determination unit 66
Can define unnecessary fields, but it is also possible to determine unnecessary fields by another method. The unnecessary field determination unit 66 may determine an unnecessary field by selecting an algorithm for generating an ideal image signal or an algorithm with a high processing speed according to the situation.

FIG. 7 is a diagram showing, in a stepwise manner, a sequence of image signals generated when the video signal processing device 50 of the present invention performs MPEG compression encoding of a telecine signal. An image signal sequence in a case where fields 2-1 to 3-2 are deleted from a telecine signal by editing such as scene cut will be described based on the example shown in FIG.

Referring to FIG. 6, the sequence is a field image sequence in which fields A1 to B2 are deleted from a telecine signal obtained by telecine converting a film image. In this sequence, the 2-3 arrangement of the fields is distorted, and the duplicated fields on which the flags are superimposed are not arranged every five fields. As described above, the unnecessary field determination unit 66 determines six fields from the duplicate field (B1) to the duplicate field (D2) as unnecessary fields.

The sequence includes the unnecessary field deleting unit 6
This is a field image sequence from which unnecessary fields have been deleted by 8a. By removing unnecessary fields, the sequence will have a 2-3 arrangement of fields.

The sequence includes a duplicate field deletion unit 6
8b, the overlapping field on which the flag is superimposed is deleted, and the MPEG image processing unit 74 converts the field structure into a frame structure.
In the sequence, for example, Y2Y1 indicates that the frame Y needs to be displayed in the order of the even field Y2 to the odd field Y1 when reproduced by the interlaced receiver later. Similarly, for example, E
1E2 indicates that the frame E needs to be reproduced later in the order of the odd field E1 to the even field E2 in the interlaced receiver.

The sequence is an MPEG image sequence encoded by the MPEG processing unit 74. MPE
The G processing unit 74 performs MPEG compression encoding on the sequence based on the frame prediction. In another embodiment, the MPEG processing unit 74 can also perform MPEG compression encoding of the telecine signal based on field prediction.

FIG. 8 shows an example of MPEG encoded data included in an MPEG television signal according to the present embodiment. The MPEG television signal includes a plurality of MPEG encoded data as reproduction information in order to enable STB decoding.

The top field first bit is data indicating whether the first field is upper or lower. If it is 1, it indicates that the first field is upper (odd field). If it is 0, it is higher. , Indicates that the first field is lower (even field). The interlaced STB converts the transmitted frame image based on the value of the top field first bit into
Decode to interlaced image.

The repeat first field bit is data used at the time of 2: 3 pull-down.
Applies to frame pictures. In the present embodiment, a repeat first field bit is used as data for determining how many fields (or frames) one frame of a film image is reproduced. If the value of the repeat first field bit is 1, STB
Reproduces one frame of a film image in three fields (or frames), and if 0, reproduces one frame of a film image in two fields (or frames).
If the decoder of the receiver 40 is a 60 interlaced STB, the 60 interlaced STB converts the MPEG television signal based on the top field first bit and the repeat first field bit.
It can be reproduced in the correct order.

The progressive frame bits are M
This is data indicating whether a PEG image signal can be handled in one progressive frame. If the progressive frame bit is 1, it indicates that two fields of the frame are fields at the same time. On the other hand, if the progressive frame is 0, it indicates that two fields of the frame are temporally different interlaced fields.

Each M in the sequence shown in FIG.
The values of the PEG encoded data are as shown in FIG. An object of the present embodiment is to set encoded data in 525 / 60I (24P) transmission of SDTV.

[0068] The MPEG processing section 74 performs a repeat first
Preferably, the value of the field bit is determined. MPE
The G processing unit 74 sets the value of the repeat first field bit in the frame from which the duplicate field has been deleted to 1. That is, according to the example of FIG. 7, the overlap field exists in the frames Z and F of the film image, and the MPEG processing unit 74 sets the value of the repeat first field bit of the frames Z and F to 1. . M
The PEG processing unit 74 has a memory for storing information related to field deletion, and may determine the value of the repeat first field bit based on the stored data.

On the other hand, top field first
The value of the bit is determined by the order of the odd and even fields shown in the sequence. The frames starting from the odd field are E and F,
The processing unit 74 sets the value of the top field first bit of E and F to 1. On the other hand, the frames starting from the even field are Y and Z, and the MPEG processing unit 74 sets the value of the top field first bit of Y and Z to 0.

The MPEG processing section 74 has a progressive
Set all frame bit values to one. Conventional MP
In the EG processing section, the progressive frame bit is set to 1 when the repeat first field bit is 1, but the repeat first field bit is set to 1.
When the field bit was 0, the progressive frame bit could be set to 0. This is because the encoder cannot determine whether a frame that is not repeated (60I signal) represents the same thing in time in two fields. In this embodiment, in the SDTV broadcast, the STB of the receiver is an MPE.
To be able to accurately reproduce the G TV signal, 52
All progressive frames at 5 / 60I (24P)
The bit value is forcibly set to 1.

As described above, the value of each bit of the MPEG encoded data is set. This MPEG television signal is
60 interlaced STB or 60 progressive S
Both TB can be suitably reproduced.

FIG. 9 shows an example of the M
1 shows an image sequence reproduced by a 60 progressive STB and an image sequence reproduced by a 60 interlaced STB of a PEG television signal. Either STB can reproduce an image based on the values of the repeat first field bit, the top field first bit, and the progressive frame bit.

FIG. 10 is a flowchart showing the operation sequence of each component in the video signal processing device 50 according to the present embodiment. In S10, the telecine signal with the flag superimposed is input to the video signal processing device 50, and the operation sequence starts. At S12, a flag superimposed on the telecine signal is detected. Subsequently, in S14, the field interval of the duplicated field is detected based on the detected flag.

Then, whether the duplicated fields are arranged every 5 fields, that is, the field interval is 4
Is determined. When the field interval is 4, it is determined that the 2-3 arrangement of the fields in the telecine signal is maintained. Conversely, if the field interval is not 4, 2-3 of the field in the telecine signal
It is determined that the array is out of order. At this time, S18
Thus, an unnecessary field is determined for a telecine signal whose 2-3-field arrangement is broken. Unnecessary fields are determined so that the telecine signal can maintain a 2-3 arrangement of fields when the unnecessary fields are removed from the telecine signal.

At S20, duplicate fields and unnecessary fields are deleted. Here, deleting a field means that the field is not treated as a valid data signal. Therefore, the deleted duplicated fields and unnecessary fields are not MPEG-encoded in the subsequent MPEG compression encoding process.
In S22, the telecine signal from which the field has been deleted is M
PEG encoded. The MPEG processing unit 74 converts the field structure in the telecine signal into a frame structure, and performs MPEG compression coding on the image signal having the frame structure based on the frame prediction. In S24, the operation sequence of the video signal processing device 50 ends.

FIG. 11 is a block diagram showing a modification of the video signal processing device 50 according to the first embodiment. FIG.
In FIG. 1, the components denoted by the same reference numerals as those in FIG.
It has the same or similar function as the corresponding configuration. In this modified example, the video signal processing device 50 includes a telecine signal determination unit 86. In this modification, a telecine signal determination unit 86 is provided between the field interval detection unit 64 and the unnecessary field determination unit 66.

The video signal processor 50 can process a mixed signal of a telecine signal and an image signal other than the telecine signal. For example, as an image signal other than the telecine signal, a progressive image signal of 60 frames / second,
There is an interlaced image signal of 60 fields / sec. For example, when inserting a commercial into a movie, the video signal processing device 50 needs to process such mixed signals.

The mixed signal is input to the flag detector 62. The flag detection unit 62 detects a flag in the mixed signal, and the field interval detection unit 64 detects a field interval between overlapping fields on which the flag is superimposed.

The telecine signal determination section 86 determines whether the currently input signal is a telecine signal or an image signal other than a telecine signal. When it is determined that the input signal is a telecine signal, the signal is transmitted to the telecine signal processing unit 7.
The signal is supplied to the unnecessary field determination unit 66 in the second stage. On the other hand, when it is determined that the input signal is a signal other than the telecine signal, the signal is directly supplied to the MPEG processing unit 74 and is not supplied to the unnecessary field determination unit 66 and the field deletion unit 68. This is because an image signal other than a telecine signal does not need to determine an unnecessary field, and further does not need to be de-telecine.

The telecine signal determining section 86 can determine the type of signal based on the field interval detected by the field interval detecting section 64. An example of a signal determination method by the telecine signal determination unit 86 will be described below.

The field interval in an unedited telecine signal is 4. Also, as is clear from FIG. 6, the maximum value of the field interval in the edited telecine signal is 8. Therefore, if the signal input to the field interval detector 64 is a telecine signal, the detected field interval is 8 or less.

On the other hand, since the flag is not superimposed on the image signal other than the telecine signal, when the image signal is input, the field interval is determined based on the flag in the telecine signal existing before and after the image signal. Can be Therefore, the field interval becomes a very large value. For example, if a commercial image signal of 60 fields / second is 1
When inserted for 5 seconds, no flag is detected for at least 900 fields (60 fields × 15 seconds).

Using this fact, the telecine signal determination section 86 determines that the input signal is a telecine signal when the field interval is, for example, 10 or less, and that the input signal is an image signal other than the telecine signal otherwise. be able to. In a conventional video signal processing device, when an image signal other than a telecine signal is input, the detelecine function of the processing device is manually turned off. According to the video signal processing device 50 according to the present embodiment, it is possible to automatically process a telecine signal and other image signals without manually switching the telecine function.

FIG. 12 shows an example of the video signal processing device 50 according to the first embodiment. Video signal processing device 5
0 further includes a memory 90 in addition to the components shown in FIG. In FIG. 12, the components denoted by the same reference numerals as those in FIG. 5 can realize the same or similar functions and operations as the corresponding components.

The telecine signal from which unnecessary fields have been deleted in the telecine signal processing section 72 is temporarily stored in the memory 90. The memory 90 is a large-capacity memory such as a hard disk or a tape having a capacity capable of storing at least an information amount of the entire telecine signal (one piece of movie information). The telecine signal stored in the memory 90 is read out by the MPEG encoder 70 according to the broadcast time, and
EG processing is performed and transmitted.

FIG. 13 shows another example of the video signal processing device 50 according to the first embodiment. The video signal processing device 50 has a memory 94 and a timing control unit 96 in addition to the components shown in FIG. In FIG.
A configuration denoted by the same reference numeral as the configuration can realize the same or similar function and operation as the corresponding configuration. If the unnecessary field is deleted, a blank portion is generated in the data sequence of the telecine signal, so that it is impossible to perform the MPEG processing on the telecine signal in real time.
The video signal processing device 50 according to the present embodiment is characterized in that the operation of the memory 94 and the timing control unit 96 can perform MPEG processing of a telecine signal in real time. Hereinafter, operations of the memory 94 and the timing control unit 96 in the present embodiment will be described.

A few seconds before the start of the MPEG processing, a telecine signal is input to the telecine signal processing section 72. The telecine signal processing section 72 deletes unnecessary fields in the telecine signal. The memory 94 stores a telecine signal output from the unnecessary field deleting unit 68a. The memory 94
It may be a small-capacity memory functioning as a buffer for storing a part of the telecine signal, for example, a FIFO capable of storing image information for several seconds of the telecine signal.

The timing control unit 96 controls the read timing of the memory 94 so that the telecine signal is output from the memory 94 to the duplicated field deletion unit 68b after a predetermined time has elapsed from the input of the telecine signal to the memory 94. Control. The telecine signals are output from the memory 94 to the overlapping field deletion unit 68b in the order in which they are stored. By delaying the timing of reading the memory 94 by the timing control unit 96, it becomes possible to temporally absorb a blank sequence accompanying deletion of an unnecessary field. Therefore, even if the unnecessary field is deleted, the telecine signal is always output from the memory 94, and the telecine signal can be MPEG-processed in real time.

For example, a telecine signal is input to the telecine signal processing section 72 three seconds before the start of the MPEG processing, and the telecine signal information for three seconds is stored in the memory 94. The timing controller 96 causes the memory 94 to continuously output the telecine signal three seconds after the telecine signal is input to the memory 94. When unnecessary fields are not deleted, the memory 94 always stores telecine signal information for three seconds. If the unnecessary fields for one second are deleted, the telecine signal information for two seconds is stored in the memory 94. As long as the telecine signal information is stored in the memory 94, the telecine signal is stored in the memory 9.
4 and can be continuously MPEG-processed in real time.

FIG. 14 is a block diagram showing a second embodiment of the video signal processing device 50 according to the present invention. The video signal processing device 50 includes a telecine signal processing unit 76, an MPEG
An encoder 70 and an image converter 80 are provided. The telecine signal processing unit 76 may have the same configuration as the telecine signal processing unit 72 shown in FIG. 5, for example, the flag detection unit 62, the field interval detection unit 64, the unnecessary field determination unit 66, and the unnecessary field A deletion unit 68a may be included. Further, in the present embodiment, the telecine signal processing unit 76 may have the same configuration as the conventional telecine signal processing unit. In FIG. 14, the telecine signal is input to the telecine signal processing unit 76, and the image signal of 60 frames / second is input to the image conversion unit 80. However, as shown in FIG. 76
May include a telecine signal determination unit 86, and the telecine signal determination unit 86 may sort the telecine signal and the image signal. In this case, a mixed signal of a telecine signal and an image signal may be input to the telecine signal processing unit 76, and the image signal may be output from the telecine signal determination unit 86 to the image conversion unit 80. The MPEG encoder 70 includes an MPEG processing unit 7
Four.

The video signal processing apparatus 50 according to the second embodiment of the present invention processes a telecine signal and a progressive image signal of 60 frames / second, and realizes a progressive service in an STB. The telecine signal processing unit 76 and the MPEG encoder 70
The telecine signal can be MPEG compression encoded.

In this embodiment, 60 progressive image signals of 60 frames / sec are input to the image conversion section 80. For example, an MPEG video signal transmitting apparatus 30 for a system using the MP @ ML profile (see FIG. 2)
Cannot transmit 60 progressive image signal information due to the transmission band. Therefore, first, the image conversion unit 80 converts a 60 progressive image signal of 60 frames / sec into an image signal of 30 frames / sec. For example, the image conversion unit 80 may thin out a frame of an image signal of 60 frames / second every other frame and convert it to an image signal of 30 frames / second. The image signal of 30 frames / sec is MPEG-compressed and encoded in the MPEG processing unit 74. The image conversion unit 80 may further convert the image signal of 30 frames / second into the image signal of 60 fields / second. In this case, the image conversion unit 80 converts one frame into two fields, an odd field and an even field. The MPEG processing unit 74 performs MPEG compression encoding on the image signal of 60 fields / second.

FIG. 15 shows a sequence of image signals processed in the second embodiment. As shown,
In the image conversion section 80, the image signal of 60 frames / second is deleted every other frame, and is converted into an image signal of 30 frames / second. In this example, frames B, D, F, and H are deleted from a 60-frame / second image signal including frames A, B, C, D, E, F, G, and H, and frames A, C, E, and G forms an image signal of 30 frames / second.

FIG. 16 shows that the MPEG processing unit 74 converts the image signal of 30 frames / sec converted by the image
1 shows an example of MPEG encoded data when performing PEG compression encoding. In the present embodiment, the MPEG processing unit 74
The value of the repeat first field bit, which is one of the PEG encoded data, is set to 0, and the progressive
It is characterized in that the value of the frame bit is 1. The MPEG processing unit 74 sets the value of the top field first bit to 1. On the other hand, as described in connection with the first embodiment, when the telecine signal is subjected to the MPEG compression encoding, the MPEG
The encoded data is set as shown in FIG.

The MP @ ML decoder of the receiver 40 of the user can decode the MPEG television signal having the MPEG encoded data shown in FIG. 16 as a progressive image based on the MPEG encoded data. The progressive image to be decoded is A A C E E G G.

The video signal processing device 50 in the present embodiment
Is a system aiming at realizing a progressive service in an STB as described above, and switching from progressive broadcasting to interlaced broadcasting on the way is not good. In the present system, since the 60P material cannot be transmitted as it is, by downgrading to 30P, the amount of information that can be transmitted is reduced, and a uniform 60P service can be realized by STB. Thus, the user's receiver 40
Can decode both the telecine signal and the image signal transmitted in the present embodiment as a progressive image. Therefore, the user can always see a progressive image with excellent image quality without switching the screen scanning method.

FIG. 17 is a block diagram of a video signal processing device 50 according to a third embodiment of the present invention. The video signal processing device 50 includes a telecine signal processing unit 78, a flag superimposing unit 82, and an MPEG encoder 70. The telecine signal processing unit 78 may have the same configuration as the telecine signal processing unit 72 shown in FIG. 5, and includes, for example, a flag detection unit 62, a field interval detection unit 64, an unnecessary field determination unit 66, and an unnecessary field Deleter 6
8a. Also, in FIG. 17, the telecine signal is input to the telecine signal processing unit 78 and the still image signal of 60 fields / second is input to the flag superimposing unit 82. However, as shown in FIG. The unit 78 may include a telecine signal determination unit 86, and the telecine signal determination unit 86 may sort the telecine signal and the image signal. In this case, a mixed signal of a telecine signal and an image signal may be input to the telecine signal processing unit 78, and the image signal may be output from the telecine signal determination unit 86 to the flag superimposing unit 82.

The video signal processor 50 according to the third embodiment of the present invention processes an interlaced image signal of 60 fields / second in the same manner as a telecine signal having a 2-3 array of fields. In this embodiment, the 60-field / second interlaced image signal is an interlaced still image.

The flag superimposing section 82 superimposes a flag on the still image signal field every five fields. In the interlaced still image signal, since the same field exists every other field, the field two fields before the flag superimposed field on which the flag is superimposed is the same as the flag superimposed field. Therefore, 5
A still image signal with a flag superimposed on each field can be treated in the same way as a telecine signal with a flag superimposed on an overlapping field. The still image signal on which the flag is superimposed is supplied to the overlapping field deletion unit 68b of the MPEG encoder 70, and the flag superimposition field is deleted.

[0100] The MPEG processing section 74 processes three fields from the flag superimposition field to the first field that exists two times before the flag superimposition field as one frame. Specifically, the MPEG processing unit 74
Converts the first field and the second field existing between the first field and the flag superimposed field into a frame structure and performs MPEG compression encoding. At this time,
The MPEG processing unit 74 sets the value of the repeat field first bit in the frame structure of the first field and the second field to 1. In this way, MP
The EG processing unit 74 can process the interlaced still image signal like a telecine signal having a 2-3 field arrangement based on the superimposed flag.

FIG. 18 shows that the video signal processing device 50 shown in FIG.
FIG. 3 is a diagram illustrating a sequence of an image signal generated when performing G compression encoding. In the figure, the sequence shows an interlaced still image signal of 60 fields / second in which fields A1 and A2 are alternately repeated. Field A1
And A2 constitute a frame A.

The sequence indicates an image signal in which a flag is superimposed every five fields in the still image signal indicated by the sequence. Referring to FIG. 4, the sequence is an interlaced still image signal, but in the present embodiment, 2-1, 2-2, 3
-1, 3-2, and 3-3 fields are handled in the same manner as a telecine signal. These five types of field names are assigned to each field so that the flag is superimposed on the 3-3 field. In the present embodiment, 3-3
The field is called a flag superimposed field on which the flag is superimposed.

The sequence indicates an image signal obtained by deleting the flag superimposition field from the sequence. Then, the sequence indicates an MPEG television signal in which the sequence is MPEG-compressed and encoded by frame prediction.
As illustrated, the sequence is an image sequence obtained by compressing frame A by frame prediction. For the later description, the image data in the sequence
Indexes (i), (ii), (iii), and (iv) are added to distinguish them.

FIG. 19 shows an example of MPEG encoded data included in an MPEG television signal. The MPEG television signal includes a plurality of MPEG encoded data as reproduction information to be reproduced by the STB.

It is preferable that the MPEG processing section 74 determines the value of the repeat first field bit based on the superimposed flag. The MPEG processing unit 74
The value of the repeat first field bit in the frame from which the flag superimposition field has been deleted is set to 1. That is, according to the example of FIG. 18, the flag superimposition field exists in the frames A (ii) and A (iv) of the still image signal, and the MPEG processing unit 74 determines that the frames A (ii) and A (i
The value of the repeat first field bit in v) is 1. The MPEG processing unit 74 has a memory for storing information related to the deletion of a field. Based on the stored data, the MPEG processing unit 74
The value of the bit may be determined.

The value of the top field first bit is determined by the order of the odd and even fields shown in the sequence. The frames starting from the odd field are A (i) and A (ii) and the MPE
The G processing unit 74 sets the value of the top field first bit of A (i) and A (ii) to 1. On the other hand, the frames starting from the even field are A (iii) and A (iv), and the MPEG processing unit 74 sets the value of the top field first bit of A (iii) and A (iv) to 0. I do. Further, the MPEG processing unit 74 sets all the values of the progressive frame bits to 1.

As described above, the MPEG processing unit 74
The value of each bit of the PEG encoded data is set. By treating the interlaced still image signal as a telecine signal having a 2-3 field arrangement, the video signal processing device 50 can easily perform the MPEG processing on the mixed signal of the telecine signal and the interlaced image signal.

FIG. 20 shows a modified example of the video signal processing device 50 according to the third embodiment of the present invention. In this modification, the video signal processing device 50 shown in FIG.
However, a flag superimposing unit 88 is further provided. In FIG.
The configuration denoted by the same reference numeral as the configuration shown in FIG.
Has the same or similar function.

A mixed signal of a telecine signal on which a flag is superimposed and an interlaced still image signal is input to the telecine signal processing section 72. The telecine signal determination unit 86
It is determined whether the input signal is a telecine signal or an interlaced still image signal. If the input signal is an interlaced still image signal, the interlaced still image signal is supplied to the flag superimposing unit 88. Flag superposition unit 8
8 superimposes a flag on the still image signal every five fields. The still image signal on which the flag is superimposed is supplied to the MPEG encoder 70, and after the flag superimposition field is deleted, the still image signal is subjected to MPEG processing.

In FIGS. 17 and 20, the video signal processing device 50 superimposes a flag on an interlaced still image signal. In another modification, a flag superimposing device (not shown) may superimpose a flag on an interlaced still image signal before being input to the video signal processing device 50. At this time, the interlaced still image signal on which the flag is superimposed can be regarded as a telecine signal on which the flag is superimposed. Therefore, the video signal processing device 50 shown in FIG. 5 processes the mixed signal on which the flag is superimposed. It is possible.

In another modification, the video signal processing device 50 may have a field deletion unit for forcibly deleting the fields of the interlaced still image signal every five fields. For example, the video signal processing device 50
Has a scheduler (not shown) for performing time control of signal processing, and based on a control signal from the scheduler,
The field of the still image signal may be deleted.

As is clear from the above description, according to the present invention, it is possible to provide a video signal processing device capable of handling a film video. As described above, the present invention has been described using the embodiments, but the technical scope of the present invention is not limited to the scope described in the above embodiments. In the above embodiment,
It will be apparent to those skilled in the art that various changes or modifications can be made. It is apparent from the description of the appended claims that embodiments with such modifications or improvements are also included in the technical scope of the present invention.

[0113]

According to the present invention, it is possible to provide a video signal processing device capable of appropriately processing a telecine image signal in which the 2-3 arrangement of fields is not maintained by editing. Further, according to the present invention, a video signal capable of generating an MPEG television signal such that a receiver can progressively display a mixed signal of a telecine video signal and other video signals in a limited transmission band. There is an effect that a processing device can be provided. Further, according to the present invention, there is an effect that it is possible to provide a video signal processing device capable of uniformly handling a mixed signal of a telecine video signal and an interlaced still image signal with a telecine video signal.

[Brief description of the drawings]

FIG. 1 shows an example of an original film image and a telecine image obtained by telecine-converting the film image.

FIG. 2 is a video signal transmission system 10 according to the present invention that can transmit a film video after compressing it by MPEG.
FIG. 2 is a block diagram showing one embodiment of the present invention.

FIG. 3 shows a telecine device 20 according to an embodiment of the present invention.
It is a block diagram of.

FIG. 4 shows a telecine signal on which a flag is superimposed by a flag superimposing unit 24.

FIG. 5 is a block diagram showing an embodiment of a video signal processing device 50 according to the present invention.

FIG. 6 is a diagram for explaining a relationship between a telecine signal before editing and a telecine signal after editing.

FIG. 7 is a diagram showing a sequence of an image signal generated when the MPEG processing unit 74 performs MPEG compression encoding of a telecine signal according to the present invention.

FIG. 8 shows an example of MPEG encoded data included in an MPEG television signal.

FIG. 9 shows an image sequence reproduced by a 60 progressive STB and an image sequence reproduced by a 60 interlaced STB of an MPEG television signal output by the MPEG processing unit 74.

FIG. 10 is a flowchart showing an operation sequence of each component in the video signal processing device 50 according to the present invention.

FIG. 11 is a video signal processing device 5 according to the first embodiment.
It is a block diagram which shows the modification of 0.

FIG. 12 is a video signal processing device 5 according to the first embodiment.
0 shows an example.

FIG. 13 is a video signal processing device 5 according to the first embodiment.
0 shows another embodiment.

FIG. 14 is a block diagram showing a second embodiment of the video signal processing device 50 according to the present invention.

FIG. 15 shows a data sequence of an image signal processed in the second embodiment.

FIG. 16 shows an example of MPEG encoded data when the MPEG processing section 74 performs MPEG compression encoding of the image signal of 30 frames / sec converted by the image converting section 80.

FIG. 17 is a block diagram of a video signal processing device 50 according to a third embodiment of the present invention.

FIG. 18 shows a case where the video signal processing device 50 shown in FIG.
FIG. 4 is a diagram illustrating a sequence of image signals generated when a still image signal of 0 fields / second is subjected to MPEG compression encoding.

FIG. 19 shows an example of MPEG encoded data included in an MPEG television signal.

FIG. 20 is a modified example of the video signal processing device 50 according to the third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Video signal transmission system, 20 ... Telecine apparatus, 22 ... Telecine part, 24 ... Flag superposition part, 30 ... Video signal transmission apparatus, 40 ... Receiver
50 ... video signal processing device, 60 ... transmission unit, 62
... Flag detection unit, 64 ... Field interval detection unit, 66 ... Unnecessary field determination unit, 68a ... Unnecessary field deletion unit, 68b ... Duplicate field deletion unit, 70 ... MPEG encoder, 74 ・ ・ ・ MPE
G processing section, 72, 76, 78 ... telecine signal processing section, 80 ... image conversion section, 82, 88 ... flag superposition section, 86 ... telecine signal determination section, 90, 94 ...
.Memory, 96 ... timing control unit

Claims (18)

[Claims] 1. A telecine apparatus for generating a telecine signal obtained by converting a film image into a television signal by a 2-3 pull-down method, wherein if there is an identical duplicate field as one field, the duplicate field is used. The telecine apparatus according to claim 1, wherein a flag indicating the overlap field is superimposed on a predetermined portion in the telecine signal representing the overlap field. 2. A telecine signal obtained by converting a film image into a television signal having a field structure by a 2-3 pull-down method, wherein a flag indicating that the field is an overlapping field overlapping one field represents the overlapping field. A video signal processing device that processes the telecine signal superimposed on a predetermined position in the telecine signal, a flag detection unit that detects the flag, and an overlap field that deletes the overlap field where the flag is detected. A deletion unit, the telecine signal from which the duplicate field has been deleted is M
M to generate MPEG television signal by PEG compression encoding
A video signal processing device comprising a PEG processing unit. 3. A field interval detector for detecting a field interval between the duplicated fields on which the flag is superimposed, an unnecessary field determiner for determining an unnecessary field to be deleted based on the detected field interval, An unnecessary field deletion unit that deletes the unnecessary field determined by the unnecessary field determination unit, wherein the MPEG processing unit performs MPEG compression encoding on the telecine signal from which the duplicate field and the unnecessary field have been deleted, 3. The video signal processing apparatus according to claim 2, wherein said MPEG television signal is generated. 4. The video signal processing device according to claim 3, wherein the field interval detection unit detects the field interval based on the flag detected by the flag detection unit. 5. A memory for storing the telecine signal from which the unnecessary field has been deleted, wherein the duplicate field deletion unit deletes the duplicate field of the telecine signal stored in the memory. The video signal processing device according to claim 4. 6. The video signal processing apparatus according to claim 5, wherein the memory has a capacity capable of storing the entire telecine signal from which the unnecessary field has been deleted. 7. A memory for storing the telecine signal output from the unnecessary field deleting unit, wherein after a predetermined time has elapsed from the input of the telecine signal to the memory, the overlap field is output from the memory. The video signal processing device according to claim 4, wherein the telecine signal is output to a deletion unit. 8. The MPEG processing unit, when compressing and encoding the telecine signal by frame prediction, calculates a value of a progressive frame bit, which is one of MPEG encoded data, in a frame having no overlapping field. 8. The video signal processing device according to claim 7, wherein 1 is set. 9. An unnecessary number of unnecessary fields to be deleted when the 2-3 arrangement of the fields formed by the 2-3 pull-down scheme in the telecine signal is not maintained. The video signal processing device according to any one of claims 3 to 8, wherein: 10. The unnecessary field determining unit determines the unnecessary fields such that the unnecessary fields are arranged every five fields when the unnecessary fields are removed from the telecine signal. Item 10. The video signal processing device according to item 9. 11. The video signal processing device according to claim 10, wherein the unnecessary field determination unit determines an even number of the unnecessary fields that are continuous in time series. 12. The method according to claim 11, wherein a part of the field in the telecine signal is deleted, and
When the three arrays are collapsed, the unnecessary field determination unit
12. The video signal processing device according to claim 11, wherein the unnecessary fields that are continuous in time series are determined from a position where the partial fields are deleted. 13. A film image of 24 frames / sec.
A video signal processing device that incorporates a first image signal having a frequency different from that of the film image into a telecine signal converted into a television signal by a pull-down method, wherein the first image signal is a progressive image of 30 frames / sec. An image conversion unit for converting the telecine signal and the second image signal into a second image signal;
An MPEG processing unit that performs compression encoding. The MPEG processing unit, when performing MPEG compression encoding of the second image signal, converts a value of a repeat field first bit that is one of the MPEG encoded data. A video signal processing device, wherein 0 is set, and a value of a progressive frame bit, which is one of the MPEG encoded data, is set to 1. 14. The method according to claim 1, wherein the first image signal is 60 frames /
14. The video signal processing device according to claim 13, wherein the video signal is a progressive image of seconds. 15. A film image of 24 frames / sec.
What is claimed is: 1. A video signal processing apparatus which incorporates an interlaced still image signal of 60 fields / second into a telecine signal converted into a television signal by a pull-down method, a field deleting unit for deleting a field of the still image signal every five fields, An MPEG processing unit that performs MPEG compression encoding of the still image signal from which the field has been deleted and the telecine signal, wherein the MPEG processing unit is located two positions before the deleted field in the still image signal. When converting the first field identical to the deleted field existing in the first field and the second field existing between the first field and the deleted field into a frame structure and performing MPEG compression encoding, the MPEG encoded data The value of the repeat field first bit, which is one of A video signal processing device. 16. The apparatus according to claim 15, further comprising a flag superimposing section for superimposing a flag every five fields in the still image signal, wherein the field deleting section deletes the field on which the flag is superimposed. 2. The video signal processing device according to 1. 17. A video signal transmission system for transmitting a film image by MPEG compression encoding, wherein when generating a telecine signal obtained by converting the film image into a television signal by a 2-3 pull-down method, the same as one field. A telecine device for superimposing a flag indicating that the field is a duplicated field at a predetermined position in the telecine signal representing the duplicated field, and a video signal transmission for transmitting an MPEG television signal in which the telecine signal is MPEG-compressed and encoded. A video signal transmitting device, the video signal transmitting device detecting the flag superimposed on the telecine signal, and the overlapping field superimposing the flag. A field interval detector for detecting a field interval between the two, and An unnecessary field determination unit that determines an unnecessary field to be deleted based on a field interval; an unnecessary field deletion unit that deletes the unnecessary field; a duplicate field deletion unit that deletes the duplicate field; the duplicate field and the unnecessary field Is MPEG-encoded on the telecine signal from which
A video signal transmission system, comprising: an MPEG processing unit that generates a PEG television signal; and a transmission unit that transmits the MPEG television signal to the receiver. 18. A telecine signal obtained by converting a film image into a television signal having a field structure by a 2-3 pull-down method, wherein a flag indicating that the field is an overlapping field overlapping one field represents the overlapping field. A video signal processing method for processing the telecine signal superimposed on a predetermined position in the telecine signal, wherein the step of detecting the flag is performed, and a field interval between the overlapped fields superimposed with the flag is detected. Determining an unnecessary field to be deleted based on the detected field interval; deleting the unnecessary field; deleting the duplicate field; and deleting the duplicate field and the unnecessary field. MPEG compression encoding the telecine signal. A video signal processing method.