JPH08237694A - Telecine video signal detector - Google Patents

Abstract

PURPOSE: To distinguish telecine video signals for which video signals expressing pictures from a movie film are converted to television signals from the other normal television signals and to effectively detect them. CONSTITUTION: A pre-filter 10 eliminates the noise of inputted video signals and a motion vector detection circuit 14 detects motion vectors in respective fields from signals delayed for one frame in a delay circuit 12 and direct signals. The detected motion vectors are compared with a reference value (α, β) in a comparison and detection circuit 16, the motion vectors smaller than the reference value are detected and supplied to a majority circuit 18. The majority circuit 18 detects the motion vectors of the same size and supplies them to a five-field delay circuit 20 and a judgement circuit 22. Thus, in the judgement circuit 22 the motion vectors of the same value lower than the reference value are counted, and when the field where the number becomes more than a prescribed value 7 appears in every five fields, the video signals are judged as the telecine video signals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telecine video signal detecting device for detecting a telecine-converted video signal from a television video signal, and more particularly to a television system converting device and an image compressing / expanding device. The present invention relates to a telecine video signal detection device suitable for use in a signal processing device that performs a predetermined conversion on a video signal.

[0002]

2. Description of the Related Art Generally, when reproducing a standard motion picture film such as 16 mm or 35 mm, projection is broadcast at a speed of 24 frames per second. When converting this into a television signal of 60 fields per second using a telecine device, for example, telecine conversion called 2-3 pull-down system is performed. In this signal format, a video signal obtained from a movie film for every two frames is converted into a television signal for every five fields, so that one field is repeated for every four fields. Therefore, the converted telecine video signal has discontinuity of motion in the case of a moving image. Most of the movies currently broadcast on television broadcasts are images containing this discontinuity.

Conventionally, in order to correct the above discontinuity, for example, Japanese Patent Laid-Open Nos. 1-291581 and 2-25179.
Various proposals have been made in JP-A Nos. 4-40788, 4-72966 and 5-183884.

For example, in the video signal processing circuit disclosed in Japanese Patent Laid-Open No. 5-183884, an input signal is input when a high-definition video signal including a telecine-converted video signal is down-converted to an NTSC television signal. Then, the telecine video signal is detected from among the above, and it is processed separately from other normal video signals. In this case, with a normal video signal, a process of down-converting a high-definition signal for each field to obtain each field signal is performed. on the other hand,
In the detected telecine video signal, down-convert what generated the frame signal from the field signal,
The same process as the still image process for re-obtaining the field signal from the frame signal is performed to reduce the resolution and the image shift.

In this case, the circuit for detecting the telecine video signal has two field memories for delaying the input signal by one frame, a subtracter for taking the difference between the input signal and the signal delayed by one frame, and the difference result thereof is absolute. An absolute value circuit that digitizes the value, and an integrating circuit that integrates the differential signal that has been absolute valued,
The integrated output is compared with a predetermined threshold value Vth, and the result is the threshold value.
A comparator that outputs a signal "0" if it is smaller than Vth and a signal "1" if it is greater than or equal to the threshold value Vth, and five registers connected in series that sequentially store the comparison result,
An OR gate that ORs the outputs of these registers, and an inverter circuit that inverts the output of the final stage register,
It has an AND gate that takes the logical sum of its output and the output of the OR gate.

According to such a detection circuit, the input video signal is delayed by one frame for each field in the field memory and supplied to the subtractor. The signal delayed by one frame is subtracted from the current input by the subtractor, and the result is supplied to the absolute value circuit. The difference signal for one frame is supplied to the integrating circuit and integrated after the absolute value is taken by the absolute value circuit. The integrated value in the integrating circuit is reset at the rising edge of the field pulse. That is, the differential and absolute valued signals are integrated for each field. The integrated output from the integrating circuit is supplied to the comparator and compared with the threshold value Vth. The output of the comparator is "0" when the integrated output is smaller than the threshold Vth, and "1" when the integrated output is equal to or larger than the threshold Vth. The comparison output from the comparator is supplied to the series circuit of the register. The field pulse is supplied to the register as a clock. The output signal of each register is supplied to the OR gate. The output signal of the OR gate and the output signal of the final stage register are supplied to the AND gate, and the output signal of this AND gate becomes the detection output.

That is, the telecine video signals formed by the 2-3 pull-down system are equal every 5 fields. Therefore, when the input signal is a telecine video signal, all the AND gate input signals for every five fields are "1", and the detection output is "1", so that the telecine video signal is determined.

[0008]

However, in the above-mentioned conventional technique, unless the video signal is accurately reproduced from each frame of the film, the telecine video signal converted by the 2-3 pull-down system is used. There was a problem that it could not be detected effectively. In other words, the above-mentioned circuit that takes the difference between the fields and compares the values obtained by integrating the absolute values is basically the same as the motion detection circuit for a normal television signal, and it is a normal video signal from the beginning. A still picture and a moving picture can be effectively detected in a television signal. However, in a telecine video signal in which a video signal is formed from a film, blurring occurs in each image due to mechanical factors such as uneven rotation of a motor and gears during frame feeding of the film. For this reason, in the detection circuit based on the above-described normal video signal, even if the telecine video signal is input, if a blur or the like occurs in the repeated portion for every 5 fields, the difference amount is a normal value. There is a problem in that the detection may be erroneous because it is larger than the moving image, and the telecine video signal may not be detected effectively.

The present invention solves the above-mentioned problems, and a telecine video signal converted by the 2-3 pull-down method for a signal in which a normal television signal and a telecine-converted video signal are mixed is not mistaken. It is an object of the present invention to provide a telecine video signal detection device capable of effective detection.

[0010]

In order to solve the above-mentioned problems, a telecine video signal detecting apparatus according to the present invention provides a video signal including a telecine video signal converted into a predetermined television signal by a 2-3 pull-down system. In a telecine video signal detecting device for detecting a telecine video signal from inside, the device includes a motion vector detecting means for detecting a motion vector indicating a magnitude and a direction of an image motion between video signals separated by at least one field. A comparison detection unit that compares the value of the motion vector detected by the motion vector detection unit with a predetermined reference value, and detects a motion vector whose value is less than or equal to the predetermined reference value.
It is determined whether or not the equivalence detection means for detecting motion vectors having the same value among the motion vectors less than the reference value from the comparison detection means and the number of equivalence portions from the equivalence detection means are more than a predetermined number per field. Is a judging means,
When a field having a predetermined number or more of equivalence portions is detected every 5 fields, the video signal is determined as a telecine video signal.

In this case, the determining means directly determines the motion vector of the equivalence portion from the equivalence detection means, and at least 1
It is preferable that the telecine video signal is determined by receiving it via the five 5-field delay means and comparing the numbers thereof.

Further, the judging means includes a plurality of delaying means for delaying the detection result from the equivalence detection means for every five fields, and compares the number of equivalence parts of the motion vector from each delaying means to compare the telecine video signal. May be determined.

On the other hand, in a telecine video signal detecting device for detecting a telecine video signal from a video signal including a telecine video signal converted into a predetermined television signal by the 2-3 pulldown system, at least one field is separated. Motion vector detection means for detecting a motion vector representing the magnitude and direction of motion of an image between video signals,
A comparison detection unit that compares the value of the motion vector detected by the motion vector detection unit with a predetermined reference value, and detects a motion vector whose motion vector value is less than or equal to the predetermined reference value. The average value of the motion vector calculated by the average value calculating means and the average value of the motion vector calculated by the average value calculating means are compared every five fields. Then, it is characterized by including a determining means for detecting whether or not the difference between them is a predetermined value or less, and determining the video signal as a telecine video signal when the difference is a predetermined value or less.

In this case, the judging means takes the difference between the direct calculation result from the average value calculating means and the delayed calculation result from the 5-field delay means, and the difference between the average values is a predetermined value in the horizontal direction component. It is advisable to detect a video signal within μ and within a predetermined value Δ in the vertical direction component (where (μ, Δ) is a real number) as a telecine video signal.

In the above telecine video signal detecting apparatus, the motion vector detecting means may detect each motion vector for each pixel. Further, the motion vector detecting means may detect each motion vector for each block including a predetermined number of pixels.

In these cases, the motion vector detected by the motion vector detecting means includes a horizontal direction component Vx and a vertical direction component Vy, and the comparison detecting means uses the horizontal direction component Vx and the vertical direction component Vy of the motion vector. Are compared with predetermined reference values α and β (where α and β are real numbers), and when a motion vector whose horizontal component Vx is within the reference value α and vertical component Vy is within the reference value β is detected, Good.

[0017]

According to the telecine video signal detecting device of the present invention, the motion vector detecting means detects the magnitude of the motion of the image between the video signals at least one field apart from the input video signal in each pixel or in each block. And a motion vector V representing the direction is detected. The detected motion vector V = (Vx, Vy) is compared with a predetermined reference value α, β for each of the horizontal direction component and the vertical direction component by the comparison detection means, and Vx ≦ α and Vy ≦ The motion vector V that is β is detected. As for those motion vectors, the motion vector having the same value is detected by the same value detecting means, and the judging means judges whether or not the number is equal to or more than a predetermined number. The determining means detects the video signal as a telecine-converted video signal when a field in which the number of the equivalence portions is greater than or equal to a predetermined number is detected every five fields. Further, in another invention, motion vectors having a reference value α or β or less are averaged every one field, and the average value is compared every five fields, and the difference is within a predetermined threshold value (μ, Δ), for example. The video signal is detected as a telecine converted signal.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a telecine video signal detecting apparatus according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of a telecine video signal detecting device according to the present invention. The telecine video signal detection device in this embodiment is composed of standard movie films such as 16 mm and 35 mm.
-3 A device that effectively detects a telecine video signal by distinguishing it from a general television signal from the input signals including the telecine video signal converted to a television signal by the pull-down method. In particular, in this embodiment, a telecine video signal including a mechanical image blur in the 2-3 pull-down telecine conversion is effectively detected from a motion vector including the blur, and a highly practical detection device is provided. It has been realized.

More specifically, the telecine video signal detection apparatus according to this embodiment includes a prefilter 10 as shown in FIG.
1-frame delay circuit 12, motion vector detection circuit 14,
It includes a comparison / detection circuit 16, a majority decision circuit 18, a 5-field delay circuit 20, and a repeated field determination circuit 22.

Each part will be described. The prefilter 10
Is a low-pass filter that removes high-frequency components of the video signal input through the terminal 1 to remove signal noise, and preferably includes a function of promoting a storage effect in the time axis direction.
A dimensional spatial filter is used. The video signal input to the terminal 1 is preferably a luminance signal obtained by separating the color signal from the composite video signal. In addition, when the present apparatus receives a composite video signal, the pre-filter 10 may be configured to include a Y / C separation circuit in the preceding stage. In the case of the present invention, the prefilter 10 is not always necessary, but a means for reducing the motion vector detection error by removing high frequency components is practically advantageous, and in this embodiment, the prefilter 10 is used.
Is effectively applied. The low-pass components of the luminance signal that have passed through the pre-filter 10 are supplied to the 1-frame delay circuit 12 and the motion vector detection circuit 14, respectively.

The 1-frame delay circuit 12 is a buffer circuit that accumulates and delays the video signal supplied for each field for 1 frame, that is, for each 2 fields. For example, 2 sets of field buffers connected in series, or 1 A FIFO memory that executes first-in first-out for each field is applied in a buffer having a capacity for frames.

The motion vector detection circuit 14 is a prefilter.
A vector operation circuit for obtaining a motion vector in the current field from a direct video signal supplied via 10 and a video signal delayed by one frame from the delay circuit 12. In this embodiment, each field is subdivided into each block of 8 pixels × 8 lines, and a motion vector V representing the magnitude and direction of the motion between fields of each block is perpendicular to the horizontal component Vx. It is calculated as a vector V = (Vx, Vy) consisting of the direction component Vy. As the motion vector detecting method, for example, various detecting methods such as a block matching method, a pattern matching method and a gradient calculation method are known. Although these are not particularly specified in this embodiment, any of the above methods may be used because the detection of the telecine video signal does not necessarily require fine detection and highly accurate detection. Further, in this embodiment, 8
Although the motion vector is detected for each block of 8 pixels by 8 lines, the motion vector may be calculated for each pixel if necessary. The motion vector detected by the motion vector detection circuit 14 is sequentially supplied to the comparison detection circuit 16 for each field.

The comparison / detection circuit 16 is a detection circuit for comparing whether or not the value of the detected motion vector V is within a predetermined range with a reference value and detecting only a motion vector having a value within the predetermined range. is there. In this embodiment, the horizontal component Vx of the motion vector V is compared with the reference value α, the vertical component Vy is compared with the reference value β, and the motion vector when each is within the reference value (α, β) is determined. To detect. These reference values (α, β)
Is set to (± 2 pixels, ± 3 lines) in consideration of the allowable range of mechanical image blur during telecine conversion. Most of the motion vectors that exceed these reference values are true motion vectors between frames, and only those vectors that are within the reference value are detected in distinction from these. The motion vector detected by comparison is supplied to the majority circuit 18.

The majority decision circuit 18 is an equivalence detection circuit which compares the magnitudes of motion vectors having a reference value (α, β) or less in each field and detects motion vectors having the same magnitude. This circuit 18 is formed by, for example, a buffer that holds the sequentially supplied motion vector for each value, and a comparison circuit that sequentially compares the held motion vector with the subsequently supplied motion vector. The motion vector for each value from the equivalence detection circuit 18 is supplied to the 5-field delay circuit 20 and the determination circuit 22.

The 5-field delay circuit 20 includes a majority decision circuit 18
Accumulation of detection results from each field, 5 for each
This is a buffer circuit that delays by a field, and similar to the frame delay circuit 12, a plurality of field buffers or
It may be formed by a FIFO memory or the like.

The repeat field determination circuit 22 is a motion vector from the majority circuit 18 and a 5-field delay circuit.
It includes a counting circuit that receives the motion vectors from 20 and counts each number, and a comparison circuit that compares these.
Specifically, it is determined whether or not the number of motion vectors of the same value portion counted by the counting circuit is equal to or more than a predetermined value γ (γ is an integer) in one field. In the case of the present embodiment, the value of γ is within one field when the motion vector is subdivided into (8 × 8) blocks and the motion vector is detected for each block.
Since there are 2700 blocks, in this case
It was 2000 pieces. The decision circuit compares the decision result of the field delayed by 5 fields with the decision result of the direct field from the majority decision circuit 18, and if both signals are the same, the present field is decided to be a repetitive field, that is, the telecine video. Judge as a signal. This judgment result is output terminal
It is output from 30 as a judgment signal.

The operation of the telecine video signal detection circuit in this embodiment having the above-mentioned structure will be described. First, when the video signal input through the input terminal 1 is a telecine video signal, the video signal is As shown in 5, the film image for every 2 frames is converted into a signal of 5 fields,
The respective field signals are supplied to the prefilter 10. For example, the first and second field signals 1-1st, 1-2nd are formed from the film of the first frame, and the third to fourth field signals 2-1st, 2-2nd, 2- from the second frame.
3rd (2-1st) is formed. Similarly, the third to fifth field signals 3-2nd and 3-1st from the fifth frame are formed, and the fourth to seventh field signals 4-2nd and 4-1st from the fourth frame. , 4-3rd (4-2nd) is formed. After that, two field signals are formed from odd-numbered frames, three field signals are sequentially formed from even-numbered frames, and from 24 frames
The video signals of 60 fields are sequentially supplied to the pre-filter 10 in a formed state.

In each field of the telecine video signal converted by the 2-3 pull-down method, the high frequency component is removed by the prefilter 10, and the low frequency component of the luminance signal is delayed by one frame. The signals are sequentially supplied to the circuit 12 and the motion vector detection circuit 14. As a result, the 1-frame delay circuit 12 first sequentially accumulates the first and second field signals 1-1st and 1-2nd, and then the third field 2-
When 1ST is supplied, the accumulated first field 1-1st
Is supplied to the motion vector detection circuit 14, and thereafter, when the next field is supplied, the field signals accumulated one frame before are sequentially supplied to the motion vector detection circuit 16.

Next, in the motion vector detection circuit 14, as shown in FIG.
As shown in FIG. 1, first, the video signal 1-1st of the first field from the delay circuit 12 and the motion signal of the first field from the video signal 2-1st of the third field supplied through the prefilter 10 are input. V1 is detected for each block. Similarly, the second and fourth fields 1-2nd, 2-2nd
From the second field, the motion vector V2 of the second field is detected, and thereafter, the motion vectors V3 to Vn of the field after the second field are respectively detected and output to the comparison detection circuit 16 for each field. In particular, in the case of a telecine video signal, the motion vector V3 from the fifth field 2-3rd in the third field 2-1st is a repeating field, so if there is no blur in the image, the value of the motion vector is originally It should be "0". However, the motion vector value does not become "0" due to blurring of the image due to mechanical irregularities such as rotation irregularity of the frame feed motor during telecine conversion and gears. In this case, the magnitude of blurring is usually not large, and it is possible to limit it to a certain value or less. Therefore, the motion vector in one field has a substantially uniform magnitude or less than a predetermined value. Similarly,
As for the motion vector V8 in the third field 4-2nd of the fourth frame, a motion vector having a substantially uniform value is detected from the fifth field 4-3rd. Thereafter, every five fields, a motion vector representing a uniform blur is sequentially detected in the entire field.

Next, the magnitude of the detected motion vector is compared with the reference value (α, β) for each of the horizontal direction component Vx and the vertical direction component Vy in the comparison detection circuit 16,
Only motion vectors that are less than or equal to these reference values (α, β) are valid and detected. In this case, as described above, in the first and second fields, since the motion vector is detected from the fields of the first frame and the second frame, the motion vector of the moving part of the image is the reference value (α, β) or more. Occurs, the motion vector of the moving part is invalid and cannot be detected. In the third field, since it is the value of the motion vector due to the uniform blurring between the second frames, the motion vector equal to or less than the reference value (α, β) is effectively detected in the entire field. This is because the frame feed of the film is generally up and down feed, and therefore the blurring occurs more frequently in the vertical direction and less than the vertical blurring in the horizontal direction. Therefore, in the reference value (α, β), α <β, and the value can be limited to a certain value or less as described above. In this embodiment, α is ± 2 pixels and β is ± 3 lines, and motion vector values that are substantially less than that are detected in the third field, the eighth field, and every five fields thereafter.

Next, the motion vectors below the reference value (α, β) detected by the comparison detection circuit 16 are sequentially determined by the majority circuit 18.
Is supplied to. The majority circuit 18 sequentially compares the motion vectors, detects a motion vector having the same value, and supplies the motion vector to the 5-field delay circuit 20 and the determination circuit 22. In this case, for example, in the first and second fields, only the static part in those images is detected, and the motion vector having a small motion but a different value is invalid and cannot be detected. In the third field, motion vectors having the same value due to uniform blurring are effectively detected and output on the entire surface. After that, similarly, a motion vector having a uniform value is detected every 5 fields over the entire surface of the field similar to the third field, and only a static part is detected in the other fields.

Next, the decision circuit 22 which has received the motion vector having the same value counts the number of the motion vector for each field and compares it with a predetermined value γ. In this case, each field is divided into blocks of 8x8 pixels, so the number of blocks is 2700, of which γ = 2
When the number of motion vectors exceeding 000 is detected, it is determined that the repeated field is the third field. To be precise, the majority circuit 18 is delayed by 5 fields from the field, for example, the eighth field.
If the count value exceeds the value γ, that is, if the number of motion vectors in every 5 fields exceeds the value γ and this is repeated, it is determined as a telecine video signal, and the determination signal Is output from the output terminal 30.

The determination signal from the output terminal 30 is supplied to, for example, a signal processing device and is subjected to, for example, still image processing or moving image processing in accordance with the determination result of the input signal to generate a telecine video signal and a general television signal. It is applied when signal processing is performed with distinction between.

As described above, in this embodiment, the motion vector for each field is detected between the field separated by one frame, and the value of the motion vector is the predetermined reference value α,
Motion vectors within β are detected, and motion vectors with the same value are counted, and when the number of motion vectors is equal to or larger than a predetermined number γ and repeated every five fields, it is determined as a telecine video signal. For example, it is possible to effectively detect a telecine video signal converted by blurring of an image due to a mechanical factor during telecine conversion by the 2-3 pulldown method.

Although the above state may be erroneously detected as the 2-3 pull-down method when the input signal is a still image, the correction in the telecine conversion is originally a motion correction, and when the input is a still image. Is not affected by the correction, so the actual situation is not a problem.

In the above embodiment, the decision circuit 22 receives the delay signal from one 5-field delay circuit 20 and compares it with the current signal. For example, as shown in FIG.
If a plurality of delay circuits 22 for each field are combined and the determination circuit 24 determines from the signal patterns thereof, more accurate determination becomes possible. For example, among the determination signals from the four fields including the direct signal, when three or more patterns exceed a predetermined value, it may be determined as a telecine video signal.

FIG. 3 shows a second embodiment of the telecine video signal detecting apparatus according to the present invention. In this embodiment, the same parts as those in FIG. 1 are designated by the same reference numerals.
The difference of this embodiment from the first embodiment is that, after the comparison and detection circuit 16, instead of the majority circuit 18, motion vectors within a reference value (α, β) are averaged in that field. Averaging circuit 26 for calculating the average value of motion vectors 26
The determination circuit 28 takes the difference between the average value of the motion vector from the averaging circuit 26 and the average value of the motion vector from the 5-field delay circuit 20 to obtain a reference value smaller than the reference value (α, β). The point is that a circuit is provided which, when compared with (μ, Δ), includes an average value smaller than this, determines a telecine video signal. In this case, (μ, Δ)
Is a real number and a specific value is (± 1 pixel, ± 1 line).

That is, in the telecine video signal, since there is only one type of motion blur in one frame, for example, the motion vector V3 in the third field and the motion vector V8 in the eighth field are one type in one field. Motion vector can be integrated. Therefore, among the detected motion vectors, those within the reference value (α, β) are averaged in one field, and one type of vector is used as the representative vector.
This can be replaced with the case where there are a predetermined number or more of motion vectors of the same size in the field. Thus, by taking the difference between the representative vectors for every 5 fields, it is possible to detect a repeating field for every 5 fields that does not actually move.

As described above, in this embodiment, the comparison detection circuit 16
The average value for each field is calculated by the averaging circuit 26 for the motion vector within the reference value (α, β) from, and the difference between the value and the average value of the fields separated by 5 fields is determined by the judging circuit 28. By calculating, a similar motion vector due to image blur is detected in the repeated field, so
The difference becomes equal to or less than the reference value (μ, Δ), and the telecine video signal can be effectively detected.

[0040]

As described above in detail, according to the telecine video signal detecting apparatus of the present invention, the motion vector for each field is detected between the fields separated by one frame and the value of the motion vector is predetermined. Of the telecine video signal when the motion vectors within the reference values α and β of are detected, and the motion vectors having the same value are counted and the number of motion vectors is equal to or larger than a predetermined number γ and repeated every five fields. Therefore, for example, when telecine conversion by 2-3 pull-down method, the image is blurred due to mechanical factors and the converted telecine video signal is effectively detected by distinguishing it from other general television signals. can do. According to another invention, the detected reference values α, β
The motion vector within is averaged, the difference between the current field and the average value delayed by 5 fields is calculated, and the video signal whose difference is within a predetermined value (μ, Δ) is determined to be a telecine video signal. In addition, it is possible to effectively detect telecine video signals that have been telecine converted by the 2-3 pulldown method.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a telecine video signal detection device according to the present invention.

FIG. 2 is a block diagram showing another example of a determination circuit applied to the embodiment of FIG.

FIG. 3 is a second view of the telecine video signal detection device according to the present invention.
It is a block diagram showing an example of.

FIG. 4 is a schematic diagram showing a motion vector detection example of the telecine video signal detection device according to the present invention.

FIG. 5 is a diagram showing a 2-3 pull-down method applied to the telecine video signal detection apparatus according to the present invention.

[Explanation of symbols]

 10 Pre-filter 12 1 Frame delay circuit 14 Motion vector detection circuit 16 Comparison detection circuit 18 Majority decision circuit (equal value detection circuit) 20 5 Field delay circuit 22, 24, 28 Judgment circuit 26 Averaging circuit

Claims (8)

[Claims] 1. A telecine video signal detecting device for detecting a telecine video signal from an input signal containing a telecine video signal converted into a predetermined television signal by a 2-3 pull-down system, wherein the device is at least 1 Motion vector detecting means for detecting a motion vector indicating the magnitude and direction of the motion of an image between video signals separated by more than a field, and the value of the motion vector detected by the motion vector detecting means as a predetermined reference value. By comparison, a comparison detection unit that detects a motion vector whose motion vector value is less than or equal to a predetermined reference value, and an equivalent value that detects a motion vector of the same value among the motion vectors that are less than or equal to the reference value from the comparison detection unit. The detection means and the determination means for determining whether or not the number of equivalence parts from the equivalence detection means is more than a predetermined number per field. I, if the same value portion is detected for each five fields of fields present a predetermined number or more, the telecine video signal detector which comprises a determination means for determining the video signal as a telecine video signal. 2. The telecine video signal detection device according to claim 1, wherein the determination means directly outputs the motion vector of the equivalence portion from the equivalence detection means, and at least 1.
A telecine video signal detecting device, characterized in that the telecine video signal is judged by receiving it via one of five field delay means and comparing the numbers thereof. 3. The telecine video signal detection device according to claim 1, wherein the determination means includes a plurality of delay means for delaying the detection result from the equivalence detection means every 5 fields, and each of the delay means is provided. A telecine video signal detection device, characterized in that the number of equal parts of motion vectors is compared to determine a telecine video signal. 4. A telecine video signal detecting device for detecting a telecine video signal from an input signal containing a telecine video signal converted into a predetermined television signal by a 2-3 pull-down system, wherein the device is at least 1 Motion vector detecting means for detecting a motion vector indicating the magnitude and direction of the motion of an image between video signals separated by more than a field, and the value of the motion vector detected by the motion vector detecting means as a predetermined reference value. By comparison, a comparison detection unit that detects a motion vector whose motion vector value is less than or equal to a predetermined reference value, and a motion vector that is less than or equal to the reference value detected by the comparison detection unit, and receives the respective fields thereof. And an average value calculation means for calculating the average value of the motion vector and the average value of the motion vectors calculated by the average value calculation means every 5 fields. A comparison means for detecting whether or not the difference between them is less than or equal to a predetermined value and determining the video signal as a telecine video signal when the difference is less than or equal to the predetermined value. Telecine video signal detector. 5. The telecine video signal detection device according to claim 4, wherein the determination means takes a difference between a direct calculation result from the average value calculation means and a delayed calculation result from the 5-field delay means. , A video signal whose average value difference is within a predetermined value μ in the horizontal direction component and within a predetermined value Δ in the vertical direction component (where (μ, Δ) is a real number) as a telecine video signal. A telecine video signal detection device characterized by detecting. 6. The telecine video signal detecting device according to claim 1, wherein the motion vector detecting means detects each motion vector for each pixel. Detection device. 7. The telecine video signal detection device according to claim 1, wherein the motion vector detection means detects each motion vector for each block including a predetermined number of pixels. Characteristic telecine video signal detector. 8. The telecine video signal detecting device according to claim 1, wherein the motion vector detected by the motion vector detecting means has a horizontal component Vx and a vertical component Vy. The comparison and detection means includes a horizontal direction component Vx and a vertical direction component of the motion vector.
Vy is compared with predetermined reference values α and β (where α and β are real numbers), and the motion vector that the horizontal component Vx is within the reference value α and the vertical component Vy is within the reference value β is detected. A telecine video signal detection device characterized by: