JP4845569B2 - Signal processing apparatus and signal processing method - Google Patents

Description

  The present invention relates to a signal processing device and a signal processing method, and more particularly, to a technique suitable for detecting whether or not a signal is a telecine-converted signal and performing processing according to the detection result.

  Movie films and the like are shot at 24 frames per second. On the other hand, standard television signals such as NTSC format signals and high-definition signals are video signals of 60 fields (30 frames) per second by interlaced scanning (interlace). Therefore, when converting a signal of a movie film or the like into a standard television signal of 60 fields (30 frames) per second (hereinafter referred to as telecine conversion), in general, 1 frame is 1/12 seconds and 2 frames. Is performed in correspondence with a 5-field interlace signal. A generally used method called 2-3 pull-down method is a method in which odd-numbered frames are telecine-converted corresponding to 2 fields, and even-numbered frames are telecine-converted corresponding to 3 fields.

  On the other hand, in recent years, it has become common to display interlaced signals by progressively scanning interlace signals into progressive signals (hereinafter referred to as IP conversion) as the display devices become more precise.

  In the IP conversion, generally, determination of a moving image / still image is performed for each pixel. In the case of a still image, an interpolation signal is generated (inter-field interpolation) by using pixels of scanning lines corresponding to temporally adjacent fields. In the case of a moving image, an interpolation signal is generated (intra-field interpolation) by pixels in adjacent scanning lines in the same field. Such motion adaptive IP conversion processing is known in recent years.

  However, with a progressive signal generated by intra-field interpolation, the apparent resolution in the vertical direction is reduced, resulting in a video lacking sharpness. Therefore, in the case of a video signal subjected to telecine conversion, the phase of the 2-3 pull-down cycle (information indicating the first field in the cycle consisting of five fields formed by 2-3 pull-down) is detected. For example, Patent Document 1 proposes a television signal processing circuit that generates an interpolation signal by using pixels on the scanning line at the same position in any of the front and rear fields.

  Further, in order to prevent erroneous detection in telecine detection and to stably perform IP conversion of a video signal subjected to telecine conversion, a cycle of a telecine video signal repeated in five fields (hereinafter referred to as a telecine cycle) is detected a plurality of times. A signal detection circuit for performing telecine determination is known (for example, see Patent Documents 2 and 3).

  However, in order to accurately detect the telecine, it is necessary to detect and repeat the telecine video signal cycle repeated in 5 fields a plurality of times. Therefore, in order to accurately determine whether the video signal has been telecine converted. Will take quite a long time. In addition, when IP conversion processing of video signals telecine-converted in an incorrect telecine cycle is performed, field images having no correlation are overlapped to form a progressive signal, resulting in a double image in a moving image, etc. , Significant image quality degradation occurs.

  In order to avoid such image quality deterioration, a technique has been proposed in which scene change detection is performed so that a telecine detection signal is masked in a field where a scene change is detected. For example, Patent Document 4 is known as such a telecine video signal detection apparatus that does not perform IP conversion processing on a telecine-converted video signal. Also, when telecine detection is canceled, multiple telecine cycles are not detected. If a still image field that appears only once in 5 fields is detected in a field different from the original phase, a telecine detection signal is output. A video signal processing device to be canceled is also known (see, for example, Patent Document 5).

Japanese Unexamined Patent Publication No. 3-250881 Japanese Patent No. 3104494 JP 2002-204433 A JP 2001-28735 A JP 2005-223503 A

  However, there are many still picture fields different from the scene change and the original phase in the telecine converted video. For this reason, if the IP conversion processing is not performed on the telecine-converted video signal each time a scene change or a still image field different from the original phase is detected, the high-quality video that is the original purpose is not displayed. There was a problem that it could not be obtained. On the other hand, in order to detect a change in the telecine cycle accurately with a reduced delay, a large-capacity frame memory is required, which is practically impossible.

  In view of the above-described problems, an object of the present invention is to make it possible to suppress image quality degradation even when there are many still image fields different from scene changes or original phases.

  The signal processing device according to the present invention is a signal processing device that converts an input interlaced video signal into a progressive video signal, and the input video signal is a video signal obtained by performing 2-3 pulldown processing. Determination means for determining whether or not the input video signal is converted into a video signal for sequential scanning, and scanning is performed sequentially by selectively outputting successive fields of the input video signal. A first mode for generating a video signal of the first and a second mode for generating an interpolated signal in accordance with the movement of the input video signal and generating a sequentially scanned video signal using the interpolated signal are selected. The first mode is selected when the input video signal is a video signal subjected to 2-3 pulldown processing, and the input video signal is processed as a 2-3 pulldown processing. The conversion means for selecting the second mode when not, and the detection means for detecting the disturbance of the field period according to 2-3 pull-down processing in the input video signal, the conversion means, When the first mode is selected, if a disturbance in the field period corresponding to 2-3 pull-down processing in the input video signal is detected by the detection means, the mode is switched to the second mode, After switching to the mode 2, the second mode is selected and the 2-3 pull-down process is performed until the determination unit determines that the video signal is not the 2-3 pull-down process. The 2-3 pull-down processed video signal input until it is determined that the video signal is not a video signal is converted into a sequentially scanned video signal in the second mode. Characterized in that it.

  The signal processing method of the present invention is a signal processing method for converting an input interlaced scanning video signal into a progressive scanning video signal, wherein the input video signal is a video signal obtained by performing 2-3 pulldown processing. A step of determining whether or not the input video signal is converted into a video signal for sequential scanning, wherein the sequential scanning is performed by selectively outputting consecutive fields of the input video signal. A first mode for generating a video signal of the first and a second mode for generating an interpolated signal in accordance with the movement of the input video signal and generating a sequentially scanned video signal using the interpolated signal are selected. The first mode is selected when the input video signal is a video signal subjected to 2-3 pulldown processing, and the input video signal is processed as a 2-3 pulldown processing. A conversion step of selecting the second mode when not, and a detection step of detecting a disturbance of a field period according to 2-3 pull-down processing in the input video signal. In the conversion step, When a disturbance of a field period corresponding to 2-3 pull-down processing in the input video signal is detected by the detection step when the first mode is selected, the mode is switched to the second mode, After switching to the second mode, until the determination step determines that the video signal is not the 2-3 pull-down process, the second mode is selected and the 2-3 pull-down process is performed. The 2-3 pull-down video signal input until it is determined that the video signal is not a video signal is sequentially scanned in the second mode. And converting the signal.

  According to the present invention, it is possible to suppress image deterioration at a cycle change point even when there are many scene changes and still image fields different from the original phase.

(First embodiment)
The image processing apparatus and the image processing method according to the present embodiment relate to an IP conversion process for converting an input interlace video signal into a progressive video signal by generating interpolation data for thinned lines. At that time, it performs cycle detection peculiar to telecine-converted video from difference information between frames, and if it is determined that the video is telecine-converted, it is suitable for telecine-converted video according to the phase of the telecine cycle Perform interpolation processing. Further, when a telecine cycle having a different period is detected during the interpolation process suitable for the telecine conversion video, the interpolation process suitable for the telecine conversion video is stopped, and the telecine conversion video is input while the telecine conversion video is input thereafter. It is characterized in that the interpolation process suitable for the converted video is not performed.

FIG. 12 is a block diagram illustrating a configuration example of an image processing apparatus that performs IP conversion processing corresponding to interpolation processing suitable for telecine-converted video in the present embodiment.
The image processing apparatus shown in FIG. 12 receives the input interlace video signal and generates interpolation data for the thinned lines. Then, the input interlace video signal and the generated interpolation data are synthesized by the synthesis unit 21 to be converted into a progressive video signal and output.

  Here, as an interpolation process for an interlaced video signal that is not a telecine-converted video, a generally known motion adaptive IP conversion process is performed. However, the interpolation process is not limited to the motion adaptive IP conversion process. Other IP conversion processing may be performed.

  The input interlaced video signal is input to the first field storage unit 11, and the first field storage unit 11 and the second field storage unit 12 obtain a video signal delayed by one field.

  The intra-field interpolation data generation unit 13 receives the video signal delayed by one field from the first field storage unit 11 and generates interpolation data for lines thinned out from the pixel data in the same field. Interpolation data generation processing by the intra-field interpolation data generation unit 13 includes generally known interpolation data generation processing, such as generating an average value of pixel data in the upper and lower lines adjacent to the line to be interpolated, as interpolation data. Is used.

  The difference detector 14 receives the interlaced video signal and the video signal delayed by two fields (one frame) from the second field storage unit 12, calculates the absolute value of the difference value between frames for each pixel, Generate difference data.

  The first motion detector 15 receives the inter-frame difference data output from the difference detector 14 and compares the inter-frame difference data with preset threshold data, thereby moving the motion for each pixel. judge.

  That is, when the inter-frame difference data is larger than the threshold data, it is determined as a moving image, and when it is smaller, it is determined as a still image. Here, the threshold data to be compared with the inter-frame difference data may be a fixed value or may change according to the interlace video signal. The motion data for each pixel obtained by the first motion detector 15 is used in motion adaptive IP conversion processing.

  Further, the inter-frame difference data output from the difference detector 14 is also input to the second motion detector 16. The second motion detector 16 also compares the inter-frame difference data with preset threshold value data, and obtains motion data for each pixel used for telecine detection.

  In the present embodiment, the threshold used by the first motion detector 15 and the threshold used by the second motion detector 16 are set separately. The same threshold value may be used, or the motion detectors may be unified and the same motion data may be used in the motion adaptive IP conversion process and the telecine detection process.

  The integration counter 17 integrates motion data for each pixel output from the second motion detector 16 on a field basis. Here, the motion data integrated by the integration counter 17 may be targeted for pixels in the entire field, or may be targeted for some pixels in the field.

  In the field motion detector 18, the motion in the field is determined by comparing the motion integrated data output from the integration counter 17 with the threshold data. That is, when the motion integration data is larger than the threshold data, the entire field is determined as a moving image, and when it is smaller, the entire field is determined as a still image.

  The telecine determination unit 19 determines whether or not the input interlaced video signal is a video that has been telecine-converted by 2-3 pull-down processing from the motion data in field units output from the field motion detector 18. As a result of this determination, if it is determined that the video is a telecine-converted video, a telecine detection signal is output, and a telecine cycle repeated in a five-field period specific to the telecine-converted video is output. Details of the telecine conversion video detection process will be described later.

  The interpolation data selection unit 20 receives the pixel-by-pixel motion data output from the first motion detector 15 and the telecine detection signal and telecine cycle signal output from the telecine determination unit 19. Based on this, one of the interlaced video signal, the video signal delayed by one frame output from the second field storage unit 12, and the interpolation data generated by the intra-field interpolation data generation unit 13 is selected. Select one. Then, the thinned lines are output as data to be interpolated.

  The synthesizing unit 21 synthesizes the interpolated data output from the interpolation data selecting unit 20 and interpolates the video signal delayed by one field output from the first field storage unit 11, thereby interpolating the progressive video signal. Convert to and output. That is, according to the present embodiment, an IP conversion process is performed on a video signal delayed by one field from the field of the input interlaced video signal, and a progressive video signal is output. In the present embodiment, the synthesis unit 21 constitutes a progressive video generation unit.

FIG. 13 is a flowchart illustrating an example of a procedure for selecting interpolation data in the present embodiment.
First, the telecine determination unit 19 determines whether or not the input video signal is a telecine converted video (step S201). As a result of this determination, if the video is a telecine-converted video, the interpolation data selection unit 20 follows the telecine cycle signal output from the telecine determination unit 19 and the video output from the interlace video signal or the second field storage unit 12. One of the signals is selected and output as interpolation data (step S202).

  On the other hand, if the input video signal is not a telecine-converted video as a result of the determination in step S201, the interpolation data selection unit 20 determines whether the motion data for each pixel output from the first motion detector 15 is a moving image. Whether the image is a still image is determined on a pixel-by-pixel basis (step S203).

  If the result of this determination is a moving image, the data generated by the intra-field interpolation data generation unit 13 is selected and output as interpolation data (step S204). On the other hand, if the result of determination in step S203 is a still image, the video signal output from the second field storage unit 12 is selected and output as interpolation data (step S205).

Next, an IP conversion process when a telecine conversion video is input in the configuration of the image processing apparatus described above will be described.
FIG. 14 is a timing chart showing an example of an interpolation process procedure suitable for a telecine-converted video performed when a telecine-converted video is input.

  In this embodiment, the interlaced video corresponding to the film video “A” is divided into two interlaced field videos “AO” and “AE” and input. Also, the interlaced video corresponding to the next film video “B” is divided into “BO”, “BE”, and “BO” and input into three interlaced field videos. Thereafter, the interlaced video is input from the film video converted in accordance with the 2-3 pull-down cycle period. Here, “O” at the end indicates an image in an odd field, and “E” indicates an image in an even field.

  By the way, when inter-frame difference data is obtained from a telecine-converted interlaced video signal and motion data in field units is obtained, a still image field appears in a cycle of once every 5 fields as shown in FIG. Here, “1” indicates a field determined as a moving image, and “0” indicates a field determined as a still image.

  The telecine determining unit 19 determines whether or not the video is telecine-converted depending on whether or not the period of “11110” is detected. In this embodiment, when the motion data in the field unit output from the field motion detector 18 shows a pattern of “1111011110” (the cycle in which one still image field exists in 5 fields is 2 in the same cycle). It is determined that a telecine-converted video has been input.

  In the motion data for 5 fields, there is a case where one still image field happens to appear in 5 fields even if the video is not telecine-converted. For this reason, in this embodiment, telecine determination is performed by referring to motion data for 10 fields. However, the motion data is not limited to referencing motion data for 10 fields, and motion data in more fields is referred to. You may do it.

  Once a pattern indicating that the video is telecine converted is detected, the telecine determination unit 19 outputs the state of the telecine detection signal as “1”. At the same time, the telecine determining unit 19 initializes the state of the telecine cycle signal having a 5-field period to “0” and outputs it by detecting a pattern indicating that the video has been telecine converted.

  The telecine cycle signal is initialized to a state of “0” every time a pattern indicating a telecine-converted video is detected, and a field indicating a telecine-converted video is not detected. The count-up operation is performed up to “4” in units. The counter is constituted by a free-run counter that automatically returns to “0” and performs a count-up operation up to “4” again in the next field. Here, as long as there is no disturbance in the telecine cycle period, pattern detection is performed at the timing when initialization is performed every time the state of the telecine cycle signal is “0”.

  The interpolation data selection unit 20 performs the processing as shown in steps S204 and S205 of FIG. 13 during the period in which the state of the telecine detection signal output from the telecine determination unit 19 is “0”. That is, in the case of a moving image, according to the motion data for each pixel output from the first motion detector 15, the data generated by the intra-field interpolation data generation unit 13 is selected and output as interpolation data. In the case of a still image, the video signal output from the second field storage unit 12 is selected and output as interpolation data according to the motion data for each pixel output from the first motion detector 15.

  When the state of the telecine detection signal is output as “1” from the telecine determination unit 19, the interpolation data selection unit 20 follows the telecine cycle signal output from the telecine determination unit 19. Then, either the input interlaced video signal or the video signal output from the second field storage unit 12 is selected and output as interpolation data.

  That is, when the telecine cycle signal is an even number, the video signal output from the second field storage unit 12 is selected and output as interpolation data, and when the telecine cycle signal is an odd number, the input interlaced video is output. Select a signal as interpolation data and output it. Note that which of the input interlaced video signal and the video signal output from the field storage unit 12 is selected as the interpolation data is indicated by an arrow in FIG.

  Thus, after detecting the telecine-converted video, an interpolation process suitable for the telecine-converted video is performed, so that the same video signal as the original film video can be reproduced. Before detecting the telecine-converted video, the motion adaptive IP conversion process is performed, and FIG. 14 shows the IP conversion result in the field in lower case notation of the identification symbol of the corresponding field. For example, the IP conversion result corresponding to “AO” of the one-field delayed video is expressed as “ao”, and the IP conversion result corresponding to “AE” is expressed as “ae”.

FIG. 15 is a timing chart illustrating an example of a procedure for performing an interpolation process when switching from a video signal subjected to telecine conversion to a video signal that is not a video subjected to telecine conversion.
In the present embodiment, when the motion data in the field unit output from the field motion detector 18 shows a pattern of “1XXXX1XXXX1”, it is determined that a video signal that is not a telecine-converted video is input. To do.

  Here, the field for detecting “1” is a field when the state of the telecine cycle signal output from the telecine determination unit 19 is “0”. When a telecine-converted video is input, the field is always detected. This field should be “0”. “X” indicates that the motion data in the field is not referred to.

  The field corresponding to the position of “X” is a field in which either “0” or “1” appears even if the video is a telecine converted video or a telecine converted video. The motion data is not referenced.

  If a field whose motion data is “1” when the state of the telecine cycle signal output from the telecine determination unit 19 is “0” is detected three times in succession, the telecine-converted video is displayed. It is determined that a video signal that is not is input. On the other hand, it is not limited to the reference of motion data for three fields, and it may be determined that a video signal that is not a telecine-converted video is input as a result of being continuously detected twice or more.

  When a field pattern indicating that a video signal that is not a telecine-converted video is input is detected, the telecine detection unit 19 sets the state of the telecine detection signal to “0”. Then, the interpolation data selection unit 20 performs a motion adaptive IP conversion process for selecting interpolation data according to the motion data for each pixel output from the first motion detector 15.

  As described above, as shown in FIG. 14 and FIG. 15, in the transition when the telecine-converted video is input or when the video signal is not the telecine-converted video, the information for a plurality of fields is included in the determination. Therefore, it takes a considerable amount of time to switch processing.

  As shown in FIG. 14, the transition to the IP conversion process corresponding to the telecine conversion video when the telecine conversion video is input requires a delay time of 9 fields (from “ao” to “do” of the IP conversion video). ). However, since the interpolation processing in this period is performed by motion adaptive IP conversion processing according to the motion of the pixels, the image quality does not extremely decrease.

  Next, the transition to the motion adaptive IP conversion processing when switching from the telecine-converted video to the video signal that is not the telecine-converted video requires a delay time of 14 fields as shown in FIG. 15 (IP (The field indicated as “EO” in the converted video and shaded). Interpolation processing during this period is performed by using video data in any of the preceding and following fields as interpolation data in accordance with the telecine cycle signal output from the telecine determination unit 19 even though there is no image correlation between fields. IP conversion processing is performed. This results in a double image in which the odd and even lines are shifted in the moving image, resulting in significant image quality degradation.

  On the other hand, in general, in television broadcasting, when moving from a movie scene to a commercial or another program, processing such as fade-out and black-out (black display) is performed in combination, so that significant image quality degradation is not caused. It is likely to be avoided.

  However, in a program such as a movie introduction, different scenes are joined in a relatively short period of time as shown in FIG. In such a video signal, a double image in which odd lines and even lines are shifted frequently occurs, which causes discomfort to the viewer.

  Therefore, in the present embodiment, in a telecine-converted video that has been edited so that telecine-converted video having different telecine cycles is continuously generated, when a different telecine-cycle is detected while detecting the telecine-converted video, the telecine detection signal is Double image generation by canceling and adopting the result of interpolation by normal interpolation processing means such as motion adaptation processing without re-issuing the telecine detection signal while the telecine conversion video continues Suppress.

  FIG. 1 is a block diagram illustrating a configuration example of the telecine determination unit 19 in the configuration of the image processing apparatus illustrated in FIG.

  The telecine determination unit 19 shown in FIG. 1 receives the motion data output from the field motion detector 18 shown in FIG. 12, and sequentially receives the information in units of fields in synchronization with the input vertical synchronization signal (VS). The data is stored from the first latch 1901 to the tenth latch 1910.

  That is, the first latch 1901 outputs motion data in a field delayed by one field from the input field. The tenth latch 1910 outputs motion data in a field delayed by 10 fields from the input field.

  The pattern detection unit 1911 uses the motion data in the input field and the motion data for each field delayed in units of fields output from each latch (first latch 1901 to tenth latch 1910) as 2- A signal (telecine pattern detection signal and telecine release pattern detection signal) indicating whether or not a video-specific field pattern that has been telecine-converted by 3 pull-down processing and a signal indicating whether or not a continuous still image field has been detected (still Image detection signal). The pattern detection unit 1911 corresponds to the telecine pattern detection signal output unit in the present embodiment.

  The eleventh latch 1913 receives the fact that the input of the telecine conversion video is detected by the pattern detection unit 1911 and the state of the telecine pattern detection signal is output as “1”, and outputs the telecine detection signal as “1”. The eleventh latch 1913 constitutes telecine detection signal output means in the present embodiment.

  To cancel the output of the telecine pattern detection signal as “1”, the pattern detection unit 1911 outputs a telecine release pattern detection signal or a still image detection signal, or a telecine release signal generation unit 1915 described later outputs a telecine release signal. This is done by outputting. The reason why the release of the state by the eleventh latch 1913 includes the detection of a continuous still image field will be described later.

  The cycle counter 1914 is a free-run counter, and receives the fact that the state of the telecine pattern detection signal is output from the pattern detection unit 1911 as “1”, and initializes the counter value to “0”. In other states, the count-up operation from “0” to “4” is repeated. The counter value is output as a telecine cycle signal indicating the field phase in the telecine converted video subjected to 2-3 pull down processing. This cycle counter 1914 corresponds to the telecine cycle signal generation means of this embodiment.

  The telecine cancellation signal generation unit 1915 includes a telecine pattern detection signal and a telecine cancellation pattern detection signal output from the pattern detection unit 1911, a telecine detection signal output from the eleventh latch 1913, and a telecine cycle signal output from the cycle counter 1914. In response to the detection of the input of the telecine conversion video of a different telecine cycle during the input detection of the telecine conversion video, the telecine release signal is output while maintaining the state of “1”.

FIG. 2 is a block diagram illustrating a configuration example of the telecine cancellation signal generation unit 1915 according to the present embodiment.
The cycle detector 19151 receives a telecine pattern detection signal output from the pattern detector 1911 and a telecine cycle signal output from the cycle counter 1914, and detects a disturbance in the telecine cycle period. That is, in the present embodiment, the cycle detector 19151 functions as a telecine cycle abnormality detection means.

  That is, when the telecine pattern detection signal is output as “1” when the telecine cycle signal is other than “4”, the telecine pattern detection signal at that time (“1”) is output. If the telecine pattern detection signal is output as “1” when the telecine cycle signal is “4”, the output state is set to “0”. As a result, when a telecine-converted video with a different telecine cycle period is input, a state of “1” is output.

  The 2-input AND element 19152 outputs the detection result of the telecine cycle period output from the cycle detector 19151 to the twelfth latch 19153 when it is determined that the input video signal is a telecine conversion video. . At other times, the detection result of the telecine cycle period output from the cycle detector 19151 is not output to the twelfth latch 19153. That is, the logical product of the signal output from the cycle detector 19151 and the telecine detection signal output from the eleventh latch 1913 is obtained and output.

  That is, when the telecine detection signal is “1”, the state of the signal output from the cycle detector 19151 is output to the twelfth latch 19153. When the telecine detection signal is “0”, it is set to “0” regardless of the state of the signal output from the cycle detector 19151.

  The twelfth latch 19153 outputs the telecine release signal while maintaining the state of “1” when “1” is output from the 2-input AND element 19152. The state is released when the state of the telecine release pattern detection signal is output as “1” from the pattern detection unit 1911.

  As described above, in the telecine cancellation signal generation unit 1915, when the input of the telecine conversion video having a telecine cycle period different from the telecine conversion video being detected is detected, the state of the telecine cancellation signal is output as “1”. To do.

  Returning to the description of FIG. 1, the three-input OR element 1912 calculates and outputs a logical sum of input signals. When any of the input signals is “1”, the three-input OR element 1912 is “1”. The state of is output. That is, when the state of the telecine release signal is output as “1” from the telecine release signal generator 1915, the state of “1” is output from the 3-input OR element 1912.

  In the eleventh latch 1913, while “1” is output from the 3-input OR element 1912, the output state is set to “0” regardless of the state of the telecine pattern detection signal output from the pattern detection unit 1911. Hold. In other words, the telecine detection signal indicating that the telecine-converted video signal is input is not output. This three-input OR element 1912 corresponds to telecine detection invalidating means.

  When the state of the telecine detection signal output from the telecine determination unit 19 is “1”, the interpolation data selection unit 20 illustrated in FIG. 12 follows the field cycle signal output from the telecine cycle detection unit 19 according to the interlace video signal or One of the video signals output from the second field storage unit 12 is selected and output as interpolation data.

  When the state of the telecine detection signal is “0”, it is generated by the intra-field interpolation data generation unit 13 according to the motion data for each pixel output from the first motion detector 15 and in the case of a moving image. Select and output data as interpolation data. In the case of a still image, the video signal output from the second field storage unit 12 is selected and output as interpolation data.

The timing chart of FIG. 3 shows the procedure for performing the interpolation process when the telecine converted video is input by the configuration of the image processing apparatus of the present embodiment described above.
In the present embodiment, the interlaced video corresponding to the film video “K” is input in two fields “KO” and “KE”.

  Then, the interlaced video corresponding to the next film video “L” is divided into three fields, “LO”, “LE”, and “LO”, according to the conventional 2-3 pulldown process. However, an interlaced video corresponding to another film video “P” is input after “LE” is output. Here, the telecine-converted video is edited, and the interlaced video is input at a different telecine cycle period (corresponding to scene 2) than before (corresponding to scene 1).

  Ten fields after the input of the telecine-converted video in scene 2, the pattern detection unit 1911 detects the telecine pattern in scene 2 and outputs the telecine pattern detection signal as “1”.

  Here, when the telecine cycle signal output from the cycle counter 1914 is “3”, the state of the telecine pattern detection signal is output from the pattern detection unit 1911 as “1”. As a result, the telecine cancellation signal generation unit 1915 detects that a telecine conversion image having a different telecine cycle period is input during the interpolation process corresponding to the telecine cycle period in the scene 1, and changes the state of the telecine cancellation signal. Output as “1”.

  The eleventh latch 1913 changes the state of the telecine detection signal to “0” when the state of the telecine release signal is output as “1” from the telecine release signal generation unit 1915. Thereafter, while the state of the telecine cancellation signal is “1”, even if a telecine pattern detection signal indicating that a telecine-converted video is input from the pattern detection unit 1911, the state of the telecine detection signal is changed. Keep “0”.

  The change in the state of the telecine cancellation signal output from the telecine cancellation signal generation unit 1915 detects that a video signal that is not a telecine-converted video signal is input in the pattern detection unit 1911, and the state of the telecine cancellation pattern detection signal Is output as “1”.

  According to the configuration described above, as shown in FIG. 16, in the input of a video signal in which different “scene 1” to “scene 4” are joined in a relatively short period, the telecine determination unit 19 The telecine detection signal is output as “1” only during the “scene 1” period. Then, after the telecine cycle period in “scene 2” is detected, the state of the telecine detection signal is held as “0”.

  While the state of the telecine detection signal is held as “0”, the interpolation data selection unit 20 performs normal interpolation such as motion adaptation processing instead of interpolation processing according to the telecine cycle signal output from the telecine determination unit 19. Select IP conversion processing by processing. As a result, it is possible to suppress the occurrence of a double image in which the odd and even lines are shifted.

  Note that a case where a telecine converted video having a different telecine cycle period is input during the telecine-compatible interpolation processing may occur even if the telecine converted video is not an edited telecine converted video. FIG. 4 shows an example of such a case, and shows a procedure when the viewing video is paused by the viewer.

  When a video signal input in a series of telecine cycles is stopped by the viewer and then started after an indefinite period of time, the video after restarting will have a timing different from the previous telecine cycle period. A telecine cycle period will occur.

  In such a case, according to the process described above, as shown in FIG. 4A, after the temporary suspension is canceled by the viewer, the video signal is reproduced by a telecine cycle different from the previous one. For this reason, the telecine cancel signal generation unit 1915 outputs the telecine cancel signal as “1”, whereby the telecine determination unit 19 holds the telecine detection signal as “0” while the telecine conversion video continues.

  That is, even when telecine-converted video is input in the same scene where no double image is generated, interpolation processing suitable for the telecine-converted video is not executed due to a pause operation or the like by the viewer.

  This is because the condition for determining that a video signal that is not a telecine-converted video is input by the pattern detection unit 1911 does not include a condition due to the input of a still image. That is, even when the viewer performs a pause operation, neither the telecine pattern detection signal nor the telecine release pattern detection signal is issued from the pattern detection unit 1911. As a result, the eleventh latch 1913 continues to output the state of the telecine detection signal as “1” even during the temporary stop period, and continues to perform the interpolation processing according to the telecine cycle.

  When still images are continuously input, the same interpolation result can be obtained by processing by interpolation processing according to the telecine cycle period or by normal interpolation processing such as motion adaptation processing. For this reason, in such a case, the state of the eleventh latch 1913 is released to “0” by detecting that continuous still images are input, and the state of the telecine detection signal is held as “0”. To do. Accordingly, it is possible to execute the interpolation process suitable for the telecine-converted video again after canceling the pause by the viewer. The procedure of such processing is shown in FIG.

  Returning to the description of FIG. 1, the pattern detection unit 1911 inputs the motion data in the input field and the field delayed from each latch (first latch 1901 to tenth latch 1910). When it is detected from each motion data that continuous still images are input, a still image detection signal is output as “1”.

  The 3-input OR element 1912 outputs a state “1” when the state of the still image detection signal is output as “1” from the pattern detector 1911. The eleventh latch 1913 changes the output state of the telecine detection signal to “0” when the state of “1” is output from the three-input OR element 1912.

  Here, continuous still image input detection performed by the pattern detection unit 1911 is output from motion data in the input field or from each latch (first latch 1901 to tenth latch 1910). The telecine cycle output from the cycle counter 1914 may be performed as long as the motion data in two or more fields of the motion data delayed for each field is in a state of “0” continuously. There is no need to follow the signal.

  Further, in the configuration example illustrated in FIG. 1, the continuous still image input detection result by the pattern detection unit 1911 is output as a still image detection signal. On the other hand, the input detection result of continuous still images is included in the telecine release signal output from the pattern detection unit 1911, and the 3-input OR element 1912 is set as a 2-input OR element. When the pattern detection unit 1911 determines that a video signal that is not a telecine-converted video is input, or when it is determined that a continuous still image is input, the telecine cancellation pattern detection signal is set to “1”. "Is output. Even if it does in this way, the effect similar to the operation | movement shown in FIG.4 (b) can be acquired.

(Second Embodiment)
FIG. 5 is a block diagram showing another configuration example of the telecine determination unit 19 in the configuration of the image processing apparatus shown in FIG. Note that the functional configuration of the image processing apparatus of the present embodiment is the same as that of the first embodiment shown in FIG.
The telecine determination unit 19 illustrated in FIG. 5 includes a two-input AND element 1916. From the telecine cancellation signal generation unit 1915, the telecine pattern detection signal and telecine cancellation pattern detection signal output from the pattern detection unit 1911, the telecine detection signal output from the eleventh latch 1913, and the telecine cycle output from the cycle counter 1914 The telecine cancel signal and the telecine pattern mask signal are output by receiving the signal and detecting the input of the telecine conversion video having a different telecine cycle period during the input detection of the telecine conversion video. The other configuration is the same as the configuration example of the telecine determination unit 19 shown in FIG. 1, and the description thereof is omitted.

FIG. 6 is a block diagram illustrating a configuration example of the telecine release signal generation unit 1915 according to the present embodiment.
In the telecine cancel signal generator 1915 shown in FIG. 6, the output of the two-input AND element 19152 is output as a telecine cancel signal, and the output from the twelfth latch 19153 is output as a telecine pattern mask signal with the polarity reversed. . The rest of the configuration is the same as the configuration example of the telecine cancellation signal generation unit 1915 in the telecine determination unit 19 shown in FIG.

  The 2-input AND element 19152 outputs the detection result of the telecine cycle period output from the cycle detector 19151 to the twelfth latch 19153 when it is determined that the input video signal is a telecine conversion video. To do. At other times, the detection result of the telecine cycle period output from the cycle detector 19151 is not output to the twelfth latch 19153. Then, the logical product of the signal output from the cycle detector 19151 and the telecine detection signal output from the eleventh latch 1913 is obtained and output.

  That is, when the state of the telecine detection signal is “1”, it is determined by the cycle detector 19151 that a telecine conversion image with a different telecine cycle period has been input. Is output as “1”.

  The twelfth latch 19153 outputs the state of the telecine pattern mask signal as “0” when the state of “1” is output from the two-input AND element 19152. The state is changed by outputting the state of the telecine release pattern detection signal as “1” from the pattern detection unit 1911.

  Returning to the description of FIG. 5, when the state of the telecine release signal is output as “1” from the telecine release signal generator 1915, the eleventh latch 1913 changes the state of the telecine detection signal to “0”. At the same time, the telecine pattern signal generation unit 1915 outputs the state of the telecine pattern mask signal as “0”.

  Accordingly, even if the state of the telecine pattern detection signal is output as “1” from the pattern detection unit 1911 thereafter, the state of the telecine pattern mask signal is output as “0” by the 2-input AND element 1916. The state is masked. The eleventh latch 1913 holds the state of the telecine detection signal at “0”.

A timing chart of FIG. 7 shows a procedure for performing interpolation processing when a telecine-converted video is input by the configuration of the image processing apparatus described above.
Similar to the timing chart shown in FIG. 3, an interlaced video corresponding to another film video “P” is input after “LE” is output. Here, the telecine-converted video is edited, and the interlaced video is input at a telecine cycle period (corresponding to scene 2) different from that before (corresponding to scene 1).

  Ten fields after the input of the telecine converted video in “scene 2”, the pattern detection unit 1911 detects the telecine pattern in “scene 2” and outputs the state of the telecine pattern detection signal as “1”. Here, when the telecine cycle signal output from the cycle counter 1914 is “3”, the telecine pattern detection signal is output from the pattern detection unit 1911. As a result, the telecine cancellation signal generation unit 1915 detects that a telecine conversion image having a different telecine cycle period is input during execution of the interpolation process corresponding to the telecine cycle period in “scene 1”, and the state of the telecine cancellation signal Is output as “1”.

  The eleventh latch 1913 changes the state of the telecine detection signal to “0” when the state of the telecine release signal is output as “1” from the telecine release signal generation unit 1915. At the same time, the telecine cancellation signal generation unit 1915 detects that a video signal that is not a video that has been telecine-converted by the pattern detection unit 1911 is input, and the state of the telecine cancellation pattern detection signal is output as “1”. Until then, the telecine pattern mask signal state is continuously output as "0".

  Thus, even if a telecine pattern detection signal indicating that a video that has been telecine-converted by the pattern detection unit 1911 is input thereafter, the state is masked by the 2-input AND element 1916. The eleventh latch 1913 continues to output the telecine detection signal with the state of “0”.

  As described above, in the present embodiment, in the edited telecine conversion video in which the telecine conversion video having different telecine cycles is continuously generated, when a different telecine cycle period is detected during the telecine conversion video detection, The telecine detection signal state is changed to “1”, and while the telecine conversion video continues, even if a telecine pattern indicating that the telecine conversion video is input is detected, the detection signal is masked. By doing so, the state of the telecine detection signal is not output again as “1”. Thereby, it is possible to suppress the occurrence of a double image as in the first specific example.

  Here, similarly to the configuration example shown in FIG. 1, the input detection result of continuous still images is included in the telecine cancellation signal output from the pattern detection unit 1911, and the three-input OR element 1912 is a two-input OR element. When the pattern detection unit 1911 determines that a video signal that is not a telecine-converted video is input, or when it is determined that a continuous still image is input, the state of the telecine cancel signal is “1”. The same effect can be obtained even if it is output as "."

(Third embodiment)
FIG. 8 is a block diagram showing another configuration example of the telecine determination unit 19 in the configuration of the image processing apparatus shown in FIG. Note that the functional configuration of the image processing apparatus of the present embodiment is the same as that of the first embodiment shown in FIG.
In the telecine determination unit 19 illustrated in FIG. 8, the still image detection signal output from the pattern detection unit 1911 is input to the telecine release signal generation unit 1915.

  Further, the telecine cancellation signal generation unit 1915 includes a telecine pattern detection signal output from the pattern detection unit 1911, a telecine cancellation pattern detection signal and a still image detection signal, a telecine detection signal output from the eleventh latch 1913, and a cycle counter. In response to the telecine cycle signal output from 1914, the input of the telecine conversion video having a different telecine cycle period is detected during the input detection of the telecine conversion video, and the state of the telecine release signal is output as “1”. Other configurations are the same as those of the first embodiment, and the description thereof is omitted.

FIG. 9 is a block diagram illustrating a configuration example of the telecine release signal generation unit 1915 in the telecine determination unit 19.
The telecine release signal generator 1915 shown in FIG. 9 includes a thirteenth latch 19154 and a three-input AND element 19155 that generate a cycle detection mask signal. The other configuration is the same as the configuration example of the telecine release signal generation unit 1915 in the telecine determination unit 19 shown in FIG.

  The thirteenth latch 19154 determines that a continuous still image has been input by the pattern detection unit 1911 and outputs the state of the cycle detection mask signal as “1” when the state of the still image detection signal is output as “1”. Output as “0”. The state of the cycle detection mask signal is changed to “1” when it is determined that the video signal telecine-converted by the pattern detection unit 1911 is input and the state of the telecine pattern detection signal is output as “1”. Is done.

  The 3-input AND element 19155 performs a logical product of the cycle detection mask signal output from the thirteenth latch 19154, the signal output from the cycle detector 19151, and the telecine detection signal output from the eleventh latch 1913. Find and output. Then, when all the signals are in the “1” state, a “1” state is output to the twelfth latch 19153.

  That is, while the pattern detection unit 1911 determines that continuous still images are input and the state of the cycle detection mask signal is output as “0” from the thirteenth latch 19154, the cycle detector 19151 Even if it is determined that a telecine conversion image having a different telecine cycle period is input during detection of the input of the telecine conversion image and a state of “1” is output, the three-input AND element 19155 is connected to the twelfth latch 19153. Thus, the state of “0” continues to be output, and the telecine release signal state continues to be output from the twelfth latch 19153 with the state of “0”.

A timing chart of FIG. 10 shows a procedure for performing interpolation processing when a telecine-converted video is input with the configuration of the image processing apparatus described above.
In this example, the interlaced video corresponding to the film video “K” is input divided into two fields “KO” and “KE”. The interlaced video corresponding to the subsequent film video “L” is input in three fields, “LO”, “LE”, and “LO”.

  After that, the film image is a still image scene in which the “L” image is continuous, and the interlaced input image is an even field image (“LE”) and an odd field image (“LO”). )) Is repeatedly input. After that, when the film image returns to the moving image scene and is composed of film images different from “M”, “N”, “O”, “P”, “Q”, the input interlaced image is 2-3 pull down. A video signal telecine-converted at a period is input. Here, the still image scene inserted in the middle is included as a series of scenes in the film image, and the film images “K” to “Q” are telecine-converted in the same telecine cycle period.

  For the input of continuous still images, the pattern detection unit 1911 inputs the motion data in the input field and the field delayed by the unit of field output from each latch (first latch 1901 to tenth latch 1910). Assume that the determination is made when each motion data indicates a pattern of “00000”. Here, in the detection of the pattern “00000”, it is not necessary to follow the telecine cycle signal output from the cycle counter 1914.

  In the telecine release signal generation unit 1915, when the state of the still image detection signal is output as “1” from the pattern detection unit 1911, the state of the cycle detection mask signal is output as “0” from the thirteenth latch 19154.

  Thereafter, when the film image changes from a still image scene to a moving image scene, the pattern detection unit 1911 detects a telecine pattern 10 fields after the input of the moving image, and outputs the state of the telecine pattern detection signal as “1”. At this time, when the telecine cycle signal output from the cycle counter 1914 is “4”, the telecine pattern detection signal is output from the pattern detection unit 1911.

  As a result, the telecine cancellation signal generation unit 1915 determines that the telecine conversion video of the telecine cycle period in the scene 1 is continuing. Since the cycle detector 19151 continues to output the state of “0”, the twelfth latch 19153 continues to output the state of the telecine release signal as “0”. The telecine determination unit 19 continues to output the telecine detection signal with the state of “1”.

  FIG. 11 is a timing chart showing another procedure for performing an interpolation process when a telecine converted video is input according to the configuration of the image processing apparatus of the present embodiment. In FIG. 10, a still image scene inserted in the middle is included as a series of scenes in a film image, and film images “K” to “Q” are telecine-converted at the same telecine cycle period. The procedure for performing the interpolation process in some cases is shown. On the other hand, in FIG. 11, in the reproduction of film video from a recording device or the like, the video signal input in a series of telecine cycles is stopped by the viewer and then started after an indefinite time has elapsed. Shows the procedure for performing the interpolation process.

  In such a case, the resting state is released after an indefinite period of time, so even if the same telecine conversion video is continuously input, the telecine cycle period after restart may be different from the previous telecine cycle period. High nature.

  In this example, the telecine pattern is detected by the pattern detection unit 1911 10 fields after the input of the moving image is resumed after the stationary state is released. At this time, the telecine cycle signal output from the cycle counter 1914 is “3”. Is. For this reason, the cycle detector 19151 determines that a telecine conversion image having a different telecine cycle period is input during execution of the interpolation process corresponding to the telecine cycle period in the scene 1, and outputs a state of “1”.

  However, the thirteenth latch 19154 detects the continuous still image input by the pattern detection unit 1911 and outputs the state of the still image detection signal as “1”, thereby changing the state of the cycle detection mask signal to “ "0" is output. Therefore, the 3-input AND element 19155 continues to output a “0” state to the twelfth latch 19153. As a result, the twelfth latch 19153 outputs the telecine release signal state as “0”, and the telecine determination unit 19 continues to output the telecine detection signal state as “1”.

  According to the configuration of the present embodiment described above, telecine-converted video is being detected in the edited telecine-converted video in which telecine-converted video having different telecine cycles as shown in FIG. 16 is continuously generated. When a different telecine cycle period is detected, the telecine detection signal is canceled, and the telecine detection signal is not issued again while the telecine conversion video continues, thereby suppressing the occurrence of double images.

  On the other hand, in the case where continuous still images are inserted during the detection of the telecine conversion video as shown in FIG. 4, the telecine conversion is continuously performed without changing the state of the telecine detection signal to “0”. Interpolation processing suitable for the video is performed.

  As a result, the video signal input as a moving image is resumed at the same telecine cycle period as the previous telecine cycle period. According to the configuration of the first embodiment and the second embodiment, since the interpolation process suitable for the telecine-converted video is once canceled by detecting continuous still images, the video signal input as a moving image is resumed. In this case, it takes time to detect the telecine cycle period until the interpolation process suitable for the telecine conversion video is resumed. During this period, normal interpolation process such as motion adaptation process is performed. According to the embodiment, it is possible to continuously perform the interpolation process suitable for the telecine conversion video.

(Other embodiments according to the present invention)
As described above, the image processing apparatus described in the embodiment of the present invention converts an interlace signal into a progressive signal, and specifically includes a television receiver.

  Each means constituting the image processing apparatus and the television receiver in the above-described embodiment of the present invention and each process of the image processing method can be realized by operating a program stored in a RAM or ROM of a computer. This program and a computer-readable recording medium recording the program are included in the present invention.

  Further, the present invention can be implemented as, for example, a system, apparatus, method, program, or recording medium. Specifically, the present invention may be applied to a system including a plurality of devices. The present invention may be applied to an apparatus composed of a single device.

  In the present invention, a software program (in the embodiment, a program corresponding to the timing charts shown in FIGS. 3, 7, 10, and 11) for realizing the functions of the above-described embodiments is directly or remotely transmitted to the system or apparatus. Supply. This includes the case where the system or apparatus computer also achieves by reading and executing the supplied program code.

  Accordingly, since the functions of the present invention are implemented by computer, the program code installed in the computer also implements the present invention. In other words, the present invention includes a computer program itself for realizing the functional processing of the present invention.

  In that case, as long as it has the function of a program, it may be in the form of object code, a program executed by an interpreter, script data supplied to the OS, and the like.

  Examples of the recording medium for supplying the program include a floppy (registered trademark) disk, a hard disk, an optical disk, and a magneto-optical disk. Further, there are MO, CD-ROM, CD-R, CD-RW, magnetic tape, nonvolatile memory card, ROM, DVD (DVD-ROM, DVD-R) and the like.

  As another program supply method, there is a method of connecting to a homepage on the Internet using a browser of a client computer. The computer program itself of the present invention or a compressed file including an automatic installation function can be downloaded from the homepage by downloading it to a recording medium such as a hard disk.

  It can also be realized by dividing the program code constituting the program of the present invention into a plurality of files and downloading each file from a different homepage. That is, a WWW server that allows a plurality of users to download a program file for realizing the functional processing of the present invention on a computer is also included in the present invention.

  As another method, the program of the present invention is encrypted, stored in a recording medium such as a CD-ROM, distributed to users, and encrypted from a homepage via the Internet to users who have cleared predetermined conditions. Download the key information to be solved. It is also possible to execute the encrypted program by using the key information and install the program on a computer.

  Further, the functions of the above-described embodiments are realized by the computer executing the read program. Furthermore, based on the instructions of the program, an OS or the like running on the computer performs part or all of the actual processing, and the functions of the above-described embodiments can be realized by the processing.

  As another method, the program read from the recording medium is first written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Then, based on the instructions of the program, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are also realized by the processing.

It is a block diagram which shows the structural example of the telecine determination part in the 1st Embodiment of this invention. It is a block diagram which shows the structural example of the telecine cancellation | release signal production | generation part in the 1st Embodiment of this invention. 5 is a timing chart illustrating an example of a procedure for performing an interpolation process when a telecine-converted video is input in the first embodiment of the present invention. 5 is a timing chart illustrating an example of a processing procedure when a still image is input when a telecine-converted video is input according to the configuration of the image processing apparatus according to the first exemplary embodiment of the present invention. It is a block diagram which shows the structural example of the telecine determination part in the 2nd Embodiment of this invention. It is a block diagram which shows the structural example of the telecine cancellation | release signal production | generation part in the 2nd Embodiment of this invention. It is a timing chart which shows an example of the procedure which performs the interpolation process when the telecine conversion image | video is input in the 2nd Embodiment of this invention. It is a block diagram which shows the structural example of the telecine determination part in the 3rd Embodiment of this invention. It is a block diagram which shows the structural example of the telecine cancellation | release signal production | generation part in the 3rd Embodiment of this invention. It is a timing chart which shows an example of the procedure of the interpolation process when the telecine conversion image | video is input in the 3rd Embodiment of this invention. It is a timing chart which shows the other example of the procedure which performs the interpolation process when the telecine conversion image | video is input in the 3rd Embodiment of this invention. It is a block diagram which shows the structural example of the image processing apparatus of the 1st Embodiment of this invention. 5 is a flowchart illustrating an example of a procedure for selecting interpolation data in the first embodiment of the present invention. It is a timing chart which shows an example of the procedure of the interpolation process generally performed when the input image | video switches from the normal image | video to the image | video which carried out telecine conversion. It is a timing chart which shows an example of the procedure which performs the interpolation process when the input image | video switches from the image | video by which telecine conversion was carried out to a general image | video. It is a schematic diagram which shows an example of the edited telecine conversion image | video.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 1st field memory | storage part 12 2nd field memory | storage part 13 Inter-field interpolation data production | generation part 14 Difference detector 15 1st motion detector 16 2nd motion detector 17 Integration counter 18 Field motion detector 19 Telecine determination Unit 20 interpolation data selection unit 21 combining unit 1901 first latch 1902 second latch 1903 third latch 1904 fourth latch 1905 fifth latch 1906 sixth latch 1907 seventh latch 1908 eighth latch 1909 9th latch 1910 10th latch 1913 11th latch 19153 12th latch 19154 13th latch 1911 Pattern detection unit 1912 3 input OR element 1914 cycle counter 1915 telecine release signal generation unit 1916 2 input AND element 1917 2-input OR element 19151 Cycle detector 19152 2-input AND element 19155 3-input AND element

Claims (3)

A signal processing device that converts an interlaced scanning video signal into a progressive scanning video signal,
A discriminating means for discriminating whether or not the input video signal is a video signal subjected to 2-3 pull-down processing;
A first mode for converting the inputted video signal into a progressive scanning video signal, wherein the first video signal is generated by selectively outputting successive fields of the inputted video signal. And a second mode in which an interpolation signal is generated according to the movement of the input video signal, and a progressive scanning video signal is generated using the interpolation signal, and the input video signal can be selected. Selects the first mode when the video signal is a 2-3 pulldown processed video signal, and selects the second mode when the input video signal is not a 2-3 pulldown processed video signal. Conversion means;
Detecting means for detecting disturbance of a field period corresponding to 2-3 pull-down processing in the input video signal;
When the conversion unit detects disturbance of a field period corresponding to 2-3 pull-down processing in the input video signal by the detection unit when the first mode is selected, the conversion unit After switching to the mode and switching to the second mode, the second mode is selected until the determination means determines that the video signal is not the 2-3 pull-down process, The 2-3 pull-down processed video signal input until it is determined that the video signal is not a 2-3 pull-down processed signal is converted into a sequentially scanned video signal in the second mode. A signal processing device. Motion detection means for detecting motion between frames of the input video signal;
When the detection result indicating that there is a motion is continuously obtained for a specific field based on the field period by the motion detection unit for a predetermined number of times, the determination unit determines that the input video signal is The signal processing apparatus according to claim 1, wherein the signal processing apparatus determines that the video signal has not been subjected to 2-3 pull-down processing. A signal processing method for converting an interlaced scanning video signal into a progressive scanning video signal,
A determination step of determining whether or not the input video signal is a video signal that has been subjected to 2-3 pulldown processing;
A step of converting the inputted video signal into a progressive scanning video signal, wherein a first mode of generating a progressive scanning video signal by selectively outputting successive fields of the inputted video signal; And a second mode in which an interpolation signal is generated according to the movement of the input video signal, and a progressive scanning video signal is generated using the interpolation signal, and the input video signal can be selected. Selects the first mode when the video signal is a 2-3 pulldown processed video signal, and selects the second mode when the input video signal is not a 2-3 pulldown processed video signal. Conversion process;
Detecting a disturbance of a field period according to 2-3 pull-down processing in the input video signal,
In the conversion step, when a disturbance in a field period corresponding to 2-3 pull-down processing in the input video signal is detected by the detection step when the first mode is selected, the second mode After switching to the second mode, after switching to the second mode, until the determination step determines that the video signal is not the 2-3 pull-down processing, the second mode is selected, Converting the 2-3 pulldown processed video signal input until it is determined that the video signal is not the 2-3 pulldown processed into a sequentially scanned video signal in the second mode. A characteristic signal processing method.

Images