JP2002057993A - Interlace.progressive converter, interlace.progressive conversion method and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interlace.progressive converter that can prevent disturbance of a video image caused by dissidence between a caption superimposed after telecine conversion and a sequence of a telecine signal so as to attain high image quality in the case that the telecine signal is received and IP conversion is applied in matching with the sequence of the telecine signal. SOLUTION: When an interpolation changeover control section 11 receives a detection signal S6 from a telecine detection section 5 and a detection signal S6 from a caption area detection section 7 and detects that the video signal received from the telecine detection section 5 is not a telecine signal, the interpolation changeover control section 11 controls a changeover switch 12 to output a signal that is subjected to IP conversion by a motion adaptive interpolation section 8, when the interpolation changeover control section 11 detects that the video signal received from the telecine detection section 5 is a telecine signal and the caption area detection section 7 detects a caption area, the interpolation changeover control section 11 controls the changeover switch 12 to output the signal subjected to IP conversion by the motion adaptive interpolation section 8, and when the interpolation changeover control section 11 detects that the video signal received from the telecine detection section 5 is a telecine signal and the caption area detection section 7 detects no caption area, the interpolation changeover control section 11 controls the changeover switch 12 to output the signal subjected to IP conversion by a 2-3 pull-down interpolation section 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlace-to-progressive conversion apparatus, an interlace-to-progressive conversion method, and a recording medium. The present invention relates to an interlace-to-progressive conversion device, an interlace-to-progressive conversion method, and a recording medium.

[0002]

2. Description of the Related Art Generally, interlace (interlaced scanning) is used.
By performing interlaced progressive conversion (hereinafter, referred to as IP conversion) for converting a signal into a progressive (sequential scanning) signal, it is only possible to prevent screen flicker in the scanning line direction on a television using a CRT. In addition, since the frequency of the horizontal synchronization signal between the HDTV signal and the IP-converted NTSC signal has a value close to each other, there is an advantage that a television receiver capable of displaying both HDTV and NTSC can be manufactured at relatively high cost. Some flat panel displays such as liquid crystal displays and plasma displays can display only progressive signals. From such a background, in recent years, the IP conversion technology has been regarded as being heavily used and its image quality is required to be improved, and various technologies have been conventionally proposed.

For example, JP-A-8-307837 discloses that a first motion signal is generated from a comparison between a current field and a previous field, and a second motion signal is generated from a comparison between a current field and a subsequent field. , The first motion signal and the second
It is determined whether or not the input signal is a signal converted by 3-2 pull-down according to the motion signal that is the minimum value of the motion signal. If the input signal is a signal converted by 3-2 pull-down, A signal converted to progressive scanning by field interpolation is output. If the input signal is not a signal transformed by 3-2 pull-down, the signal is converted to progressive scanning by another method using a motion signal (such as motion adaptation processing). A progressive scan conversion device that outputs a converted signal has been proposed (hereinafter, this technology is referred to as Conventional Example 1).

Japanese Patent Application Laid-Open No. 2000-78535 discloses that an intra-field interpolation signal is generated from scanning lines spatially located above and below an interpolated scanning line in the current field, and the intra-field interpolation signal and the current interpolation signal are generated. By generating a difference of a low frequency component in a vertical direction from a subsequent field signal which is a scanning line located at the same position as the interpolated scanning line with respect to the field, the current field and the following field are compared. A first matching signal representing matching is generated, and a vertical direction between an intra-field interpolation signal and a previous field signal which is a scanning line located before the current field and located at the same position as the interpolated scanning line is generated. , A second matching signal representing the matching between the current field and the previous field is generated, and the first matching signal is generated. By generating a difference between the signal and the second matching signal, a first mixing coefficient between the subsequent field signal and the previous field signal is generated. A progressive scan conversion device and method for mixing a signal with a signal to generate a field interpolation signal have been proposed. The progressive scan conversion apparatus and method also generates a third matching signal representing a match between the rear field signal and the previous field signal by generating a difference between the rear field signal and the previous field signal, and generates the first matching signal. Generating a second mixing coefficient of the intra-field interpolation signal and the interpolated field signal by selecting a signal having a minimum value from the signal, the second matching signal, and the third matching signal;
The interpolation signal is generated by mixing the intra-field interpolation signal and the field interpolation signal in accordance with the second mixing coefficient.

According to the apparatus and method for progressive scanning conversion,
It is stated that a video signal converted to interlace by 3-2 pull-down or 2-2 pull-down can be converted to progressive scanning without deterioration in image quality without performing field interpolation in an incorrect field. Also, in the case of a video signal containing many horizontal edges having large vertical high-frequency components, such as Japanese subtitles of a movie without performing field interpolation or motion adaptation processing in an incorrect field, or Even in the case of a video signal in which an image converted to interlace by 2 pull-down or 2-2 pull-down and a normal 60-field / sec image are mixed, it is possible to convert the image to progressive scanning without deterioration in image quality. (Hereinafter, this technique is referred to as Conventional Example 2).

[0006]

Generally, in a telecine conversion, a video signal of 24 frames is converted into a video signal of 30 frames, and then converted into an interlaced scan to obtain a television broadcast signal or a signal for recording on a recording medium. . In this telecine conversion, subtitles are superimposed on a television broadcast signal or a recording device in a sequence different from the telecine conversion sequence, and are usually superimposed according to a sequence of fields divided into a first field and a second field.

For this reason, in Conventional Examples 1 and 2,
When subtitles that do not follow the -3 pulldown sequence are switched, unrelated subtitles are synthesized and interpolated,
There is a case where a subtitle and a video are combined and interpolated, and there is a problem that the subtitle is disturbed in a comb shape in the scanning line direction.

The present invention has been made to solve the above-mentioned problem. When a telecine signal is input and IP conversion is performed in accordance with the telecine signal sequence, subtitles superimposed after the telecine conversion are converted into the telecine signal sequence. It is an object of the present invention to provide an interlace-to-progressive conversion device, an interlace-to-progressive conversion method, and a recording medium that can prevent image disturbance caused by mismatching and achieve high image quality.

[0009]

A first interlace-to-progressive conversion device according to the present invention comprises a telecine detecting means for detecting whether or not an input video signal is a telecine signal; A motion detecting means for performing motion detection based on one frame difference, a caption area detecting means for detecting a caption area of the input video signal, and an interface using motion adaptive interpolation according to the motion detecting signal detected by the motion detecting means. Motion adaptive interpolation means for performing race-progressive conversion, telecine conversion interpolation means for performing interlace-progressive conversion by telecine conversion interpolation, and when the telecine detection means detects that the input video signal is not a telecine signal, The interlaced / progressive converted signal is output by the motion adaptive interpolation means. Then, when the input video signal is detected as a telecine signal by the telecine detecting means, and when the subtitle area is detected by the subtitle area detecting means, the motion-adaptive interpolating means performs interlace progressive conversion. If the input video signal is detected as a telecine signal by the telecine detecting means, and no subtitle area is detected by the subtitle area detecting means, Switching means for switching so as to output a signal subjected to progressive conversion.

A second interlace-to-progressive conversion device according to the present invention comprises: a first field memory for receiving a first video signal and outputting a second video signal;
The second field memory is connected to a subsequent stage of the field memory, receives the second video signal, outputs a third video signal, and receives the first video signal and the third video signal. A subtractor that outputs an inter-frame difference signal, and an inter-frame difference signal output from the subtractor,
Telecine detecting means for detecting whether or not the input video signal is a telecine signal;
A motion detecting means for performing motion detection based on an inter-frame difference signal, and an interface based on a motion adaptive interpolation in response to the motion detection signal detected by the second video signal and the third video signal which are inputted by the motion detecting means; Motion adaptive interpolation means for performing a race-progressive conversion, telecine conversion interpolation means for receiving the second video signal and the third video signal and performing interlace-progressive conversion by telecine conversion interpolation, and the telecine detection means By
When it is detected that the input video signal is not a telecine signal, the motion-adaptive interpolation unit outputs an interlaced progressive-converted signal, and the telecine detection unit detects that the input video signal is a telecine signal. When the caption area is detected and the caption area is detected by the caption area detecting means, a signal subjected to interlace progressive conversion by the motion adaptive interpolation means is output, and the input video signal is converted by the telecine detecting means to telecine. Switching means for detecting a signal, and when the caption area detecting means does not detect a caption area, outputting a signal subjected to interlace / progressive conversion by the telecine conversion interpolation means. It is characterized by the following.

According to a third aspect of the invention, there is provided a first interlace-to-progressive conversion device which receives a first video signal and outputs a second video signal.
The second field memory is connected to a subsequent stage of the field memory, receives the second video signal, outputs a third video signal, and receives the first video signal and the third video signal. A subtractor that outputs an inter-frame difference signal, and an inter-frame difference signal output from the subtractor,
Telecine detecting means for detecting whether or not the input video signal is a telecine signal;
Motion detecting means for performing motion detection based on an inter-frame difference signal; motion adaptive interpolating means for performing interlace-progressive conversion by motion adaptive interpolation in accordance with the motion detection signal detected by the motion detecting means; And a telecine conversion interpolating means for performing an interlaced progressive conversion according to the above, and when the telecine detecting means detects that the input video signal is not a telecine signal, the second video signal and the third video signal are subjected to the motion adaptation. The motion-adaptive interpolating means to output a signal subjected to interlace progressive conversion, and the telecine detecting means detects that the input video signal is a telecine signal, and When the subtitle area is detected by the area detecting means, the second video signal And the third video signal are input to the motion adaptive interpolation means, a signal subjected to interlace progressive conversion by the motion adaptive interpolation means is output, and the input video signal is converted into a telecine signal by the telecine detection means. And if the subtitle area is not detected by the subtitle area detection means, the second video signal and the third video signal are input to the telecine conversion interpolation means, and the telecine conversion interpolation means Switching means for switching to output a signal which has been subjected to interlace-progressive conversion.

[0012] The telecine conversion interpolation means interlaces a signal telecine-converted by 2-3 pull-down.
A progressive conversion may be used.

[0013] The interlace-to-progressive conversion method of the present invention comprises the steps of detecting whether an input video signal is a telecine signal, and performing motion detection based on one frame difference of the input video signal. A step of detecting a subtitle area of the input video signal; and, if it is detected that the input video signal is not a telecine signal, performing interlace progressive conversion by motion adaptive interpolation according to the detected motion detection signal. And detecting the input video signal is a telecine signal, and, when detecting a subtitle area, performing interlaced / progressive conversion by motion adaptive interpolation according to the detected motion detection signal. If the input video signal is detected as a telecine signal and no subtitle area is detected, It is characterized in further comprising the step of performing interlace-progressive conversion, and a step of outputting the interlaced-to-progressive conversion signal by.

The recording medium according to the present invention includes a process for detecting whether or not an input video signal is a telecine signal, a process for performing motion detection based on a one-frame difference of the input video signal, and a process for detecting an input video signal. A process of detecting a subtitle area of a signal, a process of performing interlace-progressive conversion by motion adaptive interpolation according to the detected motion detection signal, a process of performing interlace-progressive conversion by telecine conversion interpolation, If it is detected that the video signal is not a telecine signal, performs interlaced progressive conversion by the motion adaptive interpolation, detects that the input video signal is a telecine signal, and, when detecting a subtitle area, Interlaced / progressive conversion by the motion adaptive interpolation is performed, and the input video signal is a telecine signal. Detects that there is, and, if not detected subtitle area is obtained by recording a program for executing a process of performing interlace-progressive conversion by telecine conversion interpolation, to the computer.

According to the present invention, even when the telecine signal is detected by the telecine detecting means and the IP conversion is performed by the telecine converting and interpolating means, the area in which the caption is detected by the caption area detecting means is not moved. It becomes possible to switch and output the video after the adaptive IP conversion. Therefore, when IP conversion is performed by telecine conversion interpolation, it is possible to prevent video disturbance that occurs when subtitles are switched, and to reproduce high-quality video.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an interlace-to-progressive conversion apparatus according to a first embodiment of the present invention, FIG. 2 is a flowchart for explaining an interlace-to-progressive conversion method of the present invention, and FIG. FIG. 3 is an explanatory diagram for describing that a signal subjected to telecine conversion by 2-3 pulldown is subjected to interlace progressive conversion.

As shown in FIG. 1, an interlace-to-progressive conversion apparatus according to a first embodiment of the present invention
An input terminal 1, a first video signal S <b> 1 from the input terminal 1, a first field memory 2 for outputting a second video signal S <b> 2, and a subsequent stage connected to the first field memory 2; A second field memory 3 for receiving a second video signal S2 and outputting a third video signal S3, a first video signal S1 and a third video signal S3,
The subtracter 4 that outputs the inter-frame difference signal S4, and the inter-frame difference signal S4 output from the subtractor 4,
A telecine detection unit 5 for detecting whether or not the input video signal is a telecine signal; a motion detection unit 6 for performing motion detection based on the one-frame difference signal S4 output from the subtracter 4; A subtitle area detection unit 7 for detecting a subtitle area of a signal, a second video signal S2 and a third video signal S3 are input, and motion adaptive interpolation is performed according to a motion detection signal S5 detected by the motion detection unit 6. A motion-adaptive interpolator 8 for performing IP conversion according to a second video signal S2 and a third video signal S3, and a 2-3 pull-down interpolator 9 for performing IP conversion by 2-3 pull-down interpolation;
And an output terminal 10 for outputting an IP-converted signal.

As shown in FIG. 3, the telecine signal detected by the telecine detection unit 5 is output once every five fields.
The signal sequence is such that the signals delayed by one frame match. Therefore, the telecine detecting unit 5
If a sequence in which the one-frame difference signal S4 approaches zero once in a field is statistically detected, it is determined that the signal is a telecine signal.

The motion detector 6 generates a one-frame difference signal S
4, and generates and outputs a motion detection signal S5 of m (m is an integer of 2 or more) bits corresponding to the video signal.

The subtitle area detecting section 7 detects subtitles superimposed on the video signal. As a method of detecting subtitles, for example, as disclosed in Japanese Patent Application Laid-Open No. 7-336519,
This is performed based on the distribution of the luminance level of the input video signal for each horizontal scanning period.

The motion-adaptive interpolation unit 8 performs a motion-adaptive IP conversion for switching between a still image and a moving image in accordance with the motion detection signal S5 detected by the motion detection unit 6. Since the method of the motion adaptive IP conversion is a method adopted in many television receivers today, the details thereof are omitted.

The 2-3 pull-down interpolation section 9 performs 2-3 pull-down IP conversion as shown in FIG.

An interpolation switching control unit 1 is provided between the output terminal 10 and the motion adaptive interpolation unit 8 and 2-3 pull-down interpolation unit 9.
A changeover switch 12 controlled by 1 is provided.

The interpolation switching control unit 11 includes a telecine detection unit 5
And the detection signals S6 and S7 from the subtitle area detection unit 7 are input, and when the telecine detection unit 5 detects that the input video signal is not a telecine signal, the signal that has been IP-converted by the motion adaptive interpolation unit 8 If the input video signal is detected as a telecine signal by the telecine detection unit 5 and a subtitle area is detected by the subtitle area detection unit 7, the signal is subjected to IP conversion by the motion adaptive interpolation unit 8. Is output by the telecine detecting unit 5, and if the subtitle area is not detected by the subtitle area detecting unit 7, if the input video signal is a telecine signal, Switch 12 so as to output the converted signal
Control.

Next, the interlaced progressive conversion method of the present invention will be described. First, in step S1, the first video signal S1 input to the input terminal 1 is supplied to the first field memory 2 and the negative The input is input to the subtitle area detection unit 7. Second video signal S2 output from first field memory 2
Is the second field memory 3, the motion adaptive interpolation unit 8,
The input is input to the 2-3 pull-down interpolation unit 9. The third video signal S3 output from the second field memory 3 is input to the positive input unit of the subtractor 4, the motion adaptive interpolation unit 8, and the 2-3 pull-down interpolation unit 9.

The subtractor 4 calculates the difference between the signal delayed by two fields, that is, the difference between one frame. The one-frame difference signal S4 output from the subtractor 4 is supplied to the telecine detecting unit 5 and the motion detecting unit 6.

The telecine detecting section 5 has one in five fields.
By statistically detecting a sequence in which the one-frame difference signal S4 approaches zero, it is detected whether or not the input video signal is a telecine signal (step S2), and the detected signal S6 is interpolated. Output to the switching control unit 11.

The motion detecting section 6 generates a one-frame difference signal S
4 and outputs a motion detection signal S5 to the motion adaptive interpolation unit 8 (step S3).

The subtitle area detecting section 7 detects a subtitle area superimposed on the video signal (step S4), and outputs the detection signal S7 to the interpolation switching control section 11.

If the input signal is not detected as a telecine signal, the interpolation switching control section 11 switches the changeover switch 12 as shown by the solid line in FIG. Thus, the signal subjected to IP conversion (step S5) by the motion adaptive interpolation unit 8 is output from the output terminal 10 through the changeover switch 12 (step S6).

When the input signal is detected as a telecine signal and a subtitle area is detected, the interpolation switching control section 11 switches the switch 12 as shown by the solid line in FIG. Thus, the signal subjected to IP conversion (step S5) by the motion adaptive interpolation unit 8 is output from the output terminal 10 through the changeover switch 12 (step S6).

Further, when it is detected that the input signal is a telecine signal and no subtitle area is detected, the interpolation switching control section 11 sets the changeover switch 12 to the state shown in FIG.
Switch as shown by the dotted line. As a result, IP conversion is performed by the 2-3 pull-down interpolation unit 9 (step S
7) The signal is output from the output terminal 10 through the changeover switch 12 (step S6).

According to the interlace-to-progressive conversion apparatus and the conversion method according to the first embodiment of the present invention, when a video signal is input such that a subtitle that does not match the sequence of a telecine signal is superimposed. However, since the caption area can output a signal subjected to the motion adaptive IP conversion, it is possible to eliminate the problem that the caption is disturbed in a comb-like manner in the scanning line direction by the 2-3 pull-down interpolation. . As a result, when displaying a telecine signal, a video signal with higher image quality can be reproduced.

FIG. 4 is a block diagram showing a configuration of an interlace-to-progressive conversion apparatus according to a second embodiment of the present invention.

In the first embodiment, the changeover switch 12
Is connected downstream of the motion adaptive interpolation unit 8 and the 2-3 pull-down interpolation unit 9, but in the second embodiment, FIG.
As shown in the figure, the changeover switch 12 is set to the motion adaptive interpolation unit 8.
And 2-3 are connected before the pull-down interpolation unit 9.

The changeover switch 12 switches between inputting the second video signal S2 output from the first field memory 2 to the motion adaptive interpolation section 8 or inputting it to the 2-3 pull-down interpolation section 9. 1 changeover switch 12a
Or input the third video signal S3 output from the second field memory 3 to the motion adaptive interpolation unit 8, or
Second to switch whether to input to the 3 pull-down interpolation unit 9
Switch 12b.

The first changeover switch 12a and the second changeover switch 12b are controlled by the interpolation changeover control section 11 and operate in conjunction with each other.

The interpolation switching control unit 11 includes a telecine detecting unit 5
, When the input video signal is not a telecine signal, the second video signal S2 and the third video signal S3 are input to the motion adaptive interpolation unit 8, and the motion adaptive interpolation unit 8 performs IP conversion. Output the first signal
Switch 12a and the second switch 12b (see the solid line).

The interpolation switching control unit 11 includes a telecine detecting unit 5
When the input video signal is detected as a telecine signal, and the subtitle area is detected by the subtitle area detection unit 7, the second video signal S2 and the third video signal S3 are converted by the motion adaptive interpolation unit. And a second switch 12a and a second switch 12b so as to output a signal that has been IP-converted by the motion-adaptive interpolator 8.
(See solid line).

The interpolation switching control unit 11 includes a telecine detecting unit 5
When the input video signal is detected as a telecine signal and the subtitle area detection unit 7 does not detect a subtitle area, the second video signal S2 and the third video signal S3 are subjected to 2-3. Input to the pull-down interpolation unit 9
The first changeover switch 12a and the second changeover switch 12b are switched so as to output the signal subjected to the IP conversion by the 2-3 pull-down interpolation unit 9 (see the dotted line).

According to the second embodiment, since the changeover switch 12 is connected before the motion adaptive interpolation section 8 and the 2-3 pull-down interpolation section 9, all the video signals are transferred to the motion adaptive interpolation section 8. There is no need to perform IP conversion in both the 8 and 2-3 pull-down interpolation units 9.

FIG. 5 is a block diagram showing a third embodiment of the present invention. The third embodiment has a recording medium 20 on which a program (IP conversion processing program) for causing a computer to execute the processing in the interlace-progressive conversion device according to the above-described first embodiment is recorded. This recording medium 20 includes a magnetic disk,
It may be a CD-ROM, a semiconductor memory, or another recording medium.

The IP conversion processing program is stored in the recording medium 20
From the computer to execute the processing described above.

FIG. 6 is a block diagram showing a fourth embodiment of the present invention. The fourth embodiment has a recording medium 30 on which a program (IP conversion processing program) for causing a computer to execute the processing in the interlace-progressive conversion device according to the above-described second embodiment is recorded. The recording medium 30 includes a magnetic disk,
It may be a CD-ROM, a semiconductor memory, or another recording medium.

The IP conversion program is stored in the recording medium 30
From the computer to execute the processing described above.

The present invention is not limited to the above embodiment, and various changes can be made within the technical scope described in the claims. For example, 2-
In addition to the 3 pull-down interpolation unit 9, a telecine conversion interpolation unit that performs interlace progressive conversion on a signal converted by 2-2 pull-down or the like may be used.

[0047]

According to the present invention, even when a signal in which a subtitle that does not match the sequence of the telecine signal is superimposed is input, the subtitle area remains in the motion adaptive IP format.
Since the converted signal can be output, it is possible to eliminate the problem that the subtitles are disturbed in a comb shape in the scanning line direction by the telecine conversion interpolation. As a result, when displaying a telecine signal, a video signal with higher image quality can be reproduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an interlace-progressive conversion device according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating an interlace-progressive conversion method according to the present invention.

FIG. 3 is an explanatory diagram for explaining interlace progressive conversion of a signal subjected to telecine conversion by 2-3 pull-down.

FIG. 4 is a block diagram illustrating a configuration of an interlace-to-progressive conversion device according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing a third embodiment of the present invention.

FIG. 6 is a block diagram showing a fourth embodiment of the present invention.

[Explanation of symbols]

 1: input terminal 2: first field memory 3: second field memory 4: subtractor 5: telecine detector 6: motion detector 7: caption area detector 8: motion adaptive interpolator 9: 2-3 Pull-down interpolation unit 10: output terminal 11: interpolation switching control unit 12: changeover switch 12a: first changeover switch 12b: second changeover switch 20: recording medium 30: recording medium S1: first video signal S2: second Video signal S3: third video signal S4: difference signal between frames S5: motion detection signal S6: detection signal S7: detection signal

Claims (6)

[Claims] 1. A telecine detecting means for detecting whether or not an input video signal is a telecine signal, a motion detecting means for performing motion detection by one frame difference of the input video signal, and an input video signal Subtitle area detection means for detecting a subtitle area of the above; motion adaptive interpolation means for performing interlace progressive conversion by motion adaptive interpolation in accordance with the motion detection signal detected by the motion detection means; Telecine conversion interpolation means for performing a race-progressive conversion, and when the input video signal is detected as not a telecine signal by the telecine detection means, a signal subjected to interlace / progressive conversion by the motion adaptive interpolation means is output. , The input video signal is converted into a telecine signal by the telecine detecting means. Detects that it is, and,
When the subtitle area is detected by the subtitle area detection means, the motion adaptive interpolation means detects
Outputting a progressive-converted signal; detecting, by the telecine detection means, that the input video signal is a telecine signal; and detecting no subtitle area by the subtitle area detection means, Switching means for switching so as to output a signal which has been subjected to interlace-to-progressive conversion by an interlace-to-progressive conversion apparatus. 2. A first field memory for receiving a first video signal and outputting a second video signal, connected to a stage subsequent to the first field memory, receiving a second video signal, A second field memory that outputs a third video signal; a subtractor that receives the first video signal and the third video signal and outputs a one-frame difference signal; Telecine detecting means for detecting whether or not the input video signal is a telecine signal based on the one-frame difference signal; motion detecting means for performing motion detection based on the one-frame difference signal output from the subtracter; A process of receiving the second video signal and the third video signal and performing interlace-progressive conversion by motion adaptive interpolation in accordance with the motion detection signal detected by the motion detection means; Adaptive interpolating means, telecine transform interpolating means to which the second video signal and the third video signal are inputted and for performing interlace progressive conversion by telecine transform interpolation, and video signals inputted by the telecine detecting means When it is detected that is not a telecine signal, outputs a signal subjected to interlaced progressive conversion by the motion adaptive interpolation means, by the telecine detection means, detects that the input video signal is a telecine signal, and,
When the subtitle area is detected by the subtitle area detection means, the motion adaptive interpolation means detects
Outputting a progressive-converted signal; detecting, by the telecine detection means, that the input video signal is a telecine signal; and detecting no subtitle area by the subtitle area detection means, Switching means for switching so as to output a signal that has been subjected to interlace-to-progressive conversion by an interlace-to-progressive conversion apparatus. 3. A first field memory for receiving a first video signal and outputting a second video signal, connected to a stage subsequent to the first field memory, receiving a second video signal, A second field memory that outputs a third video signal; a subtractor that receives the first video signal and the third video signal and outputs a one-frame difference signal; Telecine detecting means for detecting whether or not the input video signal is a telecine signal based on the one-frame difference signal; motion detecting means for performing motion detection based on the one-frame difference signal output from the subtracter; A motion adaptive interpolation means for performing interlace progressive conversion by motion adaptive interpolation according to the motion detection signal detected by the motion detection means; A telecine conversion interpolating means for performing a source-to-progressive conversion, and when the telecine detecting means detects that the input video signal is not a telecine signal, the second video signal and the third video signal are converted to the motion adaptive type. Input to the interpolation means, and the motion adaptive interpolation means
Outputting a progressive-converted signal; detecting, by the telecine detecting means, that the input video signal is a telecine signal; and detecting the subtitle area by the subtitle area detecting means, the second video signal And a third video signal to the motion adaptive interpolation means,
The interlaced / progressive-converted signal is output by the motion adaptive interpolation means, and the input video signal is detected as a telecine signal by the telecine detection means, and the subtitle area is detected by the subtitle area detection means. If not detected, the second video signal and the third video signal are input to the telecine conversion interpolation means, and the telecine conversion interpolation means outputs
Switching means for switching so as to output a signal subjected to progressive conversion. An interlace-to-progressive conversion device, comprising: 4. The telecine conversion interpolation means interlaces a signal which has been telecine-converted by 2-3 pull-down.
4. The interlace-to-progressive conversion apparatus according to claim 1, wherein the apparatus performs progressive conversion. 5. A step of detecting whether an input video signal is a telecine signal, a step of performing motion detection based on a difference of one frame of the input video signal, and a step of determining a subtitle area of the input video signal. Detecting, and when detecting that the input video signal is not a telecine signal, performing interlace progressive conversion by motion adaptive interpolation according to the detected motion detection signal; and Detecting a telecine signal and detecting a subtitle area, performing interlaced progressive conversion by motion adaptive interpolation according to the detected motion detection signal; and And no subtitle area is detected, interlaced / progressive conversion by telecine conversion interpolation is performed. Process and the interlace-to-progressive conversion method of and a step of outputting the interlace progressive conversion signal, a. 6. A process for detecting whether or not an input video signal is a telecine signal, a process for performing motion detection based on one frame difference of the input video signal, and a process for detecting a subtitle area of the input video signal. A process of detecting, a process of performing interlace-progressive conversion by motion adaptive interpolation according to the detected motion detection signal, a process of performing interlace-progressive conversion by telecine conversion interpolation, If it is detected that it is not a telecine signal, it performs interlace progressive conversion by the motion adaptive interpolation, detects that the input video signal is a telecine signal, and, if it detects a subtitle area, the motion adaptive interpolation Performs interlaced-progressive conversion, detects that the input video signal is a telecine signal, One, if not detect a caption area, a recording medium recording a program for executing a process of performing interlace-progressive conversion by telecine conversion interpolation, to the computer.