JP2009303205A - Video combination apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein a resolution of a video image created is coarse and image quality is deteriorated since the video image created when enlarging or reducing an interlaced transmission video signal, is created from a line on which interlaced scanning has been performed. <P>SOLUTION: When combining an interlaced transmission video signal on which interlaced scanning has been performed, a progressive video signal interpolated vertically is created. The created progressive video signal is enlarged to create the interlaced transmission video signal for combination. By combining the interlaced transmission video signal, a line becomes precise in enlargement, thereby obtaining a sharp combination video image. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a video synthesizer that outputs video data from a storage medium such as a BD-ROM to a television, and relates to a video synthesizer that synthesizes two types of video data.

  A method related to video signal processing for synthesizing video data has been proposed (see, for example, Patent Document 1). According to the publication, two videos are synthesized using a PinP processor.

  With reference to FIG. 8, a conventional video composition apparatus will be described. FIG. 8 is a conceptual diagram for explaining the composition operation of the video composition apparatus in the conventional example.

  In FIG. 8, video A is enlarged to create video B. Then, the video B and the video C are combined to create and output the video D.

  FIG. 9 is a conceptual diagram for explaining the operation of combining vertical video lines in the conventional example.

In FIG. 9, when synthesizing video A, which is an interlaced video, with video C,
The field of video A is separated into A-1 and A-2, interpolation lines B-1 and B-2 are created, respectively, and are combined into the same fields as C respectively.

JP-A-6-292148

  However, in the conversion of the video signal in the conventional video apparatus, when one of the videos is enlarged and synthesized, the interlaced video is enlarged, and the resolution of the created B video becomes coarse, and the displayed video is displayed. There was a problem that the image quality becomes coarse.

  An object of the present invention is to provide a video synthesizing apparatus and method that can prevent a video from being deteriorated in image quality even when an interlaced video is enlarged and synthesized.

  In the first video composition apparatus according to the present invention, when the first video signal is input and the first video signal is a progressive video signal of 24 frames per second, 3-2 pull-down is performed and 60 fields per second are obtained. A first 3-2 pull-down means for outputting an interlaced video signal at 60 fields per second as it is when the first video signal is an interlaced video signal at 60 fields per second while outputting as an interlaced video signal; When the second video signal is input and the second video signal is a progressive video signal of 24 frames per second, the second video signal is output as an interlaced video signal of 60 fields per second by performing 3-2 pulldown. If the video signal of 2 is an interlaced video signal of 60 fields per second, the interlaced video signal of 60 fields per second The second 3-2 pull-down means for outputting up to 2 and the pixel rate conversion for converting the video signal output from the second 3-2 pull-down means to the same video pixel transmission rate as that of the first video signal and outputting it And a synthesizing unit that synthesizes and outputs the video signal output from the first 3-2 pull-down unit and the video signal output from the pixel rate conversion unit.

This
When synthesizing interlaced images that are interlaced and scanned, it is possible to obtain a beautiful synthesized image by enlarging and synthesizing the interpolated image in the vertical direction.

  According to the present invention, even when a low-resolution video such as an interlaced output is output, the video is interpolated or synthesized based on the video interpolated in the same frame in accordance with the combination of the video to be synthesized. You can get composite video

The block diagram which shows the structure of the video synthesizing | combining apparatus in Embodiment 1 of this invention. Operational diagram showing the operation of the video synthesizing device in the first embodiment of the present invention Explanatory drawing which shows the synthetic | combination operation | movement of the video synthesizing | combining apparatus in the 1st Embodiment of this invention. Configuration diagram of video synthesizing apparatus of second embodiment of the present invention Operation diagram of video synthesizing apparatus of second embodiment of the present invention Operation diagram of video synthesizing apparatus of second embodiment of the present invention Flowchart of video composition method according to second embodiment of the present invention Conceptual diagram for explaining the composition operation of the image composition device in the conventional example Conceptual diagram for explaining the operation of combining vertical video lines in the conventional example

(Embodiment 1)
FIG. 1 is a block diagram showing the configuration of the video composition apparatus according to Embodiment 1 of the present invention. In FIG. 1, the video composition device synthesizes a progressive video Ap with a progressive video Cp and outputs it.

  As shown in FIG. 8, the video generated by combining has a PinP (picture-in-picture) configuration. The progressive video Cp may be called a primary video, and the progressive video Ap may be called a secondary video. Further, the resolution of the progressive video Cp of this embodiment is 1080p, and the resolution of the progressive video Ap is 480p.

  The configuration of the video composition apparatus according to Embodiment 1 of the present invention will be described with reference to FIG. The 3-2 pull-down means 1 converts the progressive video Cp of the primary video into an interlaced video (resolution: 1080i) in the same manner as an interlaced video of 60 fields per second when the progressive video Cp is 24 frames per second. And output as interlaced transmission video Ci. On the other hand, when the input primary video is an interlaced video signal of 60 fields per second, the interlaced video signal of 60 fields per second remains as it is and is output as an interlaced transmission video Ci (resolution: 1080i).

  3-2 pull-down means 2 performs interlaced transmission as interlaced video as in the case of 60 fields per second when the input secondary video progressive video Ap is 24 frames per second progressive video. Output as video Ai (resolution: 480i). On the other hand, when the input secondary video is an interlaced video signal of 60 fields per second, the interlaced video signal of 60 fields per second remains as it is and is output as an interlaced transmission video Ai (resolution: 1080i). In this specification, an image converted into an interlaced image similar to an interlaced image is referred to as an interlaced transmission image.

  The interlace transmission video Ai output from the 3-2 pull-down means 2 is input to the interpolation means 3. The interpolating means 3 calculates pixels (interpolated pixels) corresponding to the frame from the previous field for the interlaced transmission video Ai. The interpolation means 3 converts the interlaced transmission video Ai into a progressive video (resolution: 480p) based on the calculated interpolation pixel, and outputs the progressive video App1.

  The enlargement / reduction means 4 enlarges or reduces the resolution of the input progressive video, and further converts it into an interlaced transmission video. The enlarging / reducing means 4 matches the resolution to be converted with the resolution of the progressive video Cp. Therefore, the enlargement / reduction means 4 detects the resolution of the progressive video Cp, and scales it to the video position of that resolution. In the present embodiment, progressive video App1 (resolution: 480p) is converted to interlaced transmission video Aii1 (resolution: 1080i) and output.

  The synthesizing unit 5 synthesizes the interlaced transmission video Ci that is the output of the 3-2 pull-down unit 1 and the interlaced transmission video Aii1 that is the output of the enlargement / reduction unit 4 and outputs the interlaced transmission video Di1 (resolution: 1080i). To do.

  The inverse 3-2 pull-down means 6 performs inverse 3-2 pull-down on the interlaced transmission video Di1 and outputs a synthesized progressive video Dp1 (resolution: 1080p). Here, the inverse 3-2 pulldown refers to converting an interlace transmission video of 60 fields per second into a progressive video of 24 frames per second.

  The selection unit 7 selects and outputs either the interlaced transmission video Di1 that is the output of the synthesis unit 5 or the progressive video Dp1 that is the output of the inverse 3-2 pull-down unit 6.

  The operation of the video composition apparatus configured as described above will be described with reference to FIG.

  FIG. 2 is an operation diagram showing an operation of the video composition device according to the first exemplary embodiment of the present invention. T represents an even field and B represents an odd field. Also. Time t simply shows the time of each field in the case of 60 fields per second. When expressed in real time, for example, t = 1 is 1/60 [sec], and t = 2 is 2/60 [sec].

  As shown in FIG. 2, the video composition device synthesizes the progressive video Ap and the progressive video Cp to create and output an interlaced transmission video Di1.

  The progressive video Ap is a progressive video of 24 frames per second. The progressive video Ap is converted into interlaced transmission video Ai of 60 fields per second by the 3-2 pull-down means 2. The progressive video Cp is a progressive video with 24 frames per second. In the 3-2 pull-down means 1, it is converted into an interlaced transmission video Ci of 60 fields per second.

  Next, an operation for creating the interlaced transmission video Aii1 from the interlaced transmission video Ai will be described. The interpolating means 3 interpolates and calculates the video based on the previous field of the interlaced transmission video Ai. This will be described in more detail with reference to FIG.

  A case where the interlaced transmission video Aii1 (A1) at time t = 1 is created will be described. The interpolation means 3 interpolates using the interlaced transmission video Ai at time t = 0, which is the previous field. The interlace transmission video Ai at time t = 1 is an even field (T), and the interlace transmission video Ai at time t = 0 is an odd field (B). The interpolating means 3 interpolates the interlaced transmission video Ai at time t = 1 with the interlaced transmission video Ai at time t = 0 and outputs a progressive video App1.

  The enlargement / reduction means 4 converts the progressive video App1 into an interlaced transmission video Aii1 and outputs it.

  FIG. 3 is an explanatory diagram showing the interpolation and composition operations of the video composition apparatus according to Embodiment 1 of the present invention. (A) The odd field indicates a case where the interlaced transmission video Ai is an odd field. (B) The even field indicates the case where the interlaced transmission video Ai is an even field. Each circle in FIG. 3 represents a vertical line of the video. A circle on the broken line of the interlaced transmission video Ai indicates a vertical line in the previous field.

  (A) In the case of the odd field, when the progressive video App1 is created from the interlace transmission video Ai, the vertical lines of the even field of the previous field are interpolated. An interlaced transmission video Aii1 is created based on the created progressive video App1. (B) Similarly, in the case of the even field, when the progressive video App1 is created from the interlace transmission video Ai, the vertical line of the even field of the previous field is interpolated. An interlaced transmission video Aii1 is created based on the created progressive video App1. In the present embodiment, an interlaced transmission video Ai having a resolution of 1080i is created from a progressive video App1 having a resolution of 480p.

  In this way, an interpolation line is created from the immediately preceding field, and a progressive video corresponding to a frame is once created. Thereafter, the resolution is enlarged or reduced using the created progressive video. In this case, when the resolution is enlarged, the vertical line is finer, so that an image with good image quality can be output.

  When the video synthesized in this way is output progressively from the video synthesizer, by selecting the output of the inverse 3: 2 pull-down means 6 by the selection means 7, the progressive video Dp1 which is inversely pulled down 3: 2 is selected. Can also be output.

  When outputting the interlaced transmission video Di1, it is also possible to output the interlaced transmission video Di1 by selecting the output of the synthesizing unit 5 by the selection unit 7.

  In this way, after the primary video input video and the secondary video input video are pulled down 3-2, they are combined, and the synthesized interlaced transmission video or the progressive video converted to progressive video by reverse 3-2 pulldown is selected. And output. Since the selection means 7 can easily select whether to output interlaced transmission video or progressive video, the video can be transmitted with simple processing even when interlaced with the television. be able to.

  As described above, the video synthesizing apparatus according to the first embodiment of the present invention expands or reduces the resolution of an interlaced transmission video and combines it with another interlaced transmission video signal. The transmission video is temporarily interpolated and converted to progressive video. Then, based on the progressive video, an interlaced transmission video with an enlarged or reduced resolution is created and combined. When the resolution is enlarged, the vertical line becomes finer, so that an image with good image quality can be output.

  Further, according to the video composition apparatus of the present embodiment, the input primary video and secondary video are the same regardless of whether they are a progressive video signal of 24 frames per second or an interlaced video signal of 60 fields per second. The video can be synthesized with this circuit. Therefore, since it is not necessary to provide a synthesis circuit for each of the progressive video signal of 24 frames per second and the interlaced video signal of 60 fields per second, the circuit can be reduced in size.

  In the present embodiment, the resolution of the progressive video Cp is 1080p, and the resolution of the progressive video Ap is 480p. However, these are merely examples, and other resolutions may be used.

  The 3-2 pull-down unit 1 and the 3-2 pull-down unit 2 may output the input video as it is when the input video is not a progressive video of 24 frames per second.

  In the present embodiment, the field one field before the interpolation target field is used. However, the present invention is not limited to this. For example, a field one field after the interpolation target field may be used.

  In the present embodiment, the progressive video Cp is input to the enlargement / reduction unit 4. However, the resolution of the progressive video Cp is detected by a separate resolution detection unit, and only resolution information is input to the enlargement / reduction unit 4. May be.

  In the present embodiment, the interpolation unit 3 outputs the progressive video App1, but it may output interlaced transmission video Ai and interpolation pixel data that is data relating to the calculated interpolation pixel. In this case, the enlargement / reduction means 4 creates the interlaced transmission video Aii1 based on the interlaced transmission video Ai and the interpolated pixel data. In this case, the interlaced transmission video Ai input to the enlargement / reduction unit 4 may be input from the 3-2 pull-down unit 2 instead of being input from the interpolation unit 3. In this case, the interpolating means 3 does not have to output the interlaced transmission video Ai.

  As shown in FIG. 2, the 3-2 pull-down interlaced transmission video repeats 3 fields, 2 fields, 3 fields,... (Created from the same frame). Called a period). Therefore, by controlling the timing of generating the interlaced transmission video Aii1 in the enlargement / reduction means 4, or by controlling the timing of the synthesis by the synthesizing means 5, the fields of the interlaced transmission video Ci and the interlaced transmission video Aii1 are controlled. It is also possible to match the repetition period. In this case, the image quality is further improved.

Note that the inverse 3-2 pulldown reassembles the primary video into the original frame combination. In addition, the inverse 3-2 pulldown of the present invention is to recombine the original video original frame combination after the secondary video composition, regardless of the secondary video.
(Embodiment 2)
Next, a video composition apparatus according to the second embodiment will be described with reference to FIG. In addition, about the structure similar to Embodiment 1, the same code | symbol is provided and description is abbreviate | omitted.

  In FIG. 4, the video composition device is a block diagram for synthesizing and outputting the secondary video progressive video Ap to the primary video progressive video Cp.

  The configuration of the video composition apparatus according to Embodiment 2 of the present invention will be described with reference to FIG.

  Since the 3-2 pull-down means 1 and the 3-2 pull-down means 2 are the same as those in the first embodiment, description thereof will be omitted.

  The video synchronization interpolation means 8 detects video synchronization of the interlace transmission video Ai. The video synchronization interpolation means 8 selects a previous field or a subsequent field for the interlaced transmission video Ai based on the detected video synchronization, and calculates a pixel (interpolation pixel) corresponding to the frame. The video synchronous interpolation means 8 converts the interlaced transmission video Ai into a progressive video (resolution: 480p) based on the calculated interpolation pixel, and outputs it as a progressive video App2. Details of the operation of selecting the previous field or the subsequent field based on the detected video synchronization and calculating the pixel (interpolated pixel) corresponding to the frame will be described later.

  The enlargement / reduction means 4 enlarges or reduces the resolution of the input progressive video, and further converts it into an interlaced transmission video. The enlargement / reduction unit 4 matches the resolution to be converted with the resolution of the progressive video Cp. Therefore, the enlargement / reduction means 4 detects the resolution of the progressive video Cp, and scales it to the video position of that resolution. In the present embodiment, progressive video App2 (resolution: 480p) is converted to interlaced transmission video Aii2 (resolution: 1080i) and output.

  The synthesizing unit 5 synthesizes the interlace transmission video Ci that is the output of the 3-2 pull-down unit 1 and the interlace transmission video Aii2 that is the output of the enlargement / reduction unit 4 and outputs the interlace transmission video Di2 (resolution: 1080i). To do.

  The inverse 3-2 pull-down means 6 performs inverse 3-2 pull-down on the interlaced transmission video Di2 and outputs a synthesized progressive video Dp2 (resolution: 1080p). Here, the inverse 3-2 pulldown refers to converting an interlace transmission video of 60 fields per second into a progressive video of 24 frames per second.

  The selecting means 7 selects and outputs either the interlaced transmission video Di2 that is the output of the synthesizing means 5 or the progressive video Dp2 that is the output of the inverse 3-2 pull-down means 6.

  The operation of the video composition apparatus configured as described above will be described with reference to FIG.

  FIG. 5 is an operation diagram showing the operation of the video composition device according to the second exemplary embodiment of the present invention.

  In FIG. 5, T represents an even field and B represents an odd field. Also. Time t simply shows the time of each field in the case of 60 fields per second. When expressed in real time, for example, t = 1 is 1/60 [sec], and t = 2 is 2/60 [sec].

  As shown in FIG. 5, the video composition device synthesizes and outputs the progressive video Ap and the progressive video Cp.

  The progressive video Ap is a progressive video of 24 frames per second. The progressive video Ap is converted into interlaced transmission video Ai of 60 fields per second by the 3-2 pull-down means 2. The progressive video Cp is a progressive video with 24 frames per second. In the 3-2 pull-down means 1, it is converted into an interlaced transmission video Ci of 60 fields per second.

  Next, an operation for creating the interlaced transmission video Aii2 from the interlaced transmission video Ai will be described. As shown in FIG. 2, the interlaced transmission video that has been pulled down 3-2 has three fields, two fields, three fields, etc., created from the same frame. The video synchronous interpolation means 8 detects the repetition period of the above 3 fields, 2 fields, 3 fields,. An example of a specific detection method is as follows. For example, using the fact that there is one set of the same frame for every five fields and taking the difference for each field, if there is the same field, the first field and the third field of the set of three fields can be specified. . From this information, the first field, the second field, and the third field of the group of 3 fields and the first field and the second field of the group of 2 fields can be specified. The above-described method of calculation by the video synchronization interpolation unit 8 is merely an example, and may be detected by other methods.

  Information regarding whether or not the interlaced transmission video Ai is the same frame as the progressive video Ap may be input from the 3-2 pull-down means 2 to the video synchronous interpolation means 8.

  Next, a field selection method for selecting a field based on the detected repetition period when the video synchronous interpolation means 8 calculates an interpolation pixel will be described with reference to FIG.

  A description will be given of selection of a field when the enlarged / reduced interlaced transmission video Aii2 at time t = 1 is created. The interlaced transmission video Ai (A1) at time t = 0 and the interlaced transmission video Ai (A1) at time t = 1 have different frames in the progressive video Ap. On the other hand, the interlaced transmission video Ai (A1) at time t = 1 and the interlaced transmission video Ai (A2) at time t = 2 have the same frame in the progressive video Ap. Therefore, when creating the enlarged / reduced interlaced transmission video Aii2 at time t = 1, the interlaced transmission video Ai (A2) at time t = 2 is selected and the interpolation pixel is calculated.

  A description will be given of the selection of a field when the enlarged / reduced interlaced transmission video Aii2 at time t = 2 is created. The interlace transmission video Ai (A1) at time t = 1 and the interlace transmission video Ai (A2) at time t = 2 have the same frame in the progressive video Ap. On the other hand, the interlaced transmission video Ai (A2) at time t = 2 and the interlaced transmission video Ai (A3) at time t = 3 have the same frame in the progressive video Ap. Therefore, when creating the enlarged / reduced interlaced transmission video Aii2 at time t = 2, either the interlaced transmission video Ai (A1) at time t = 1 or the interlaced transmission video Ai (A3) at time t = 3. May be selected. The interlaced transmission video Ai (A1) at time t = 1 or the interlaced transmission video Ai (A3) at time t = 3 is selected, and interpolation pixels are calculated.

  A description will be given of field selection when the enlarged / reduced interlaced transmission video Aii2 at time t = 3 is created. The interlaced transmission video Ai (A2) at time t = 2 and the interlaced transmission video Ai (A3) at time t = 3 have the same frame in the progressive video Ap. On the other hand, the interlaced transmission video Ai (A4) at time t = 4 and the interlaced transmission video Ai (A3) at time t = 3 have different frames in the progressive video Ap. Therefore, when creating the enlarged / reduced interlaced transmission video Aii2 at time t = 3, the interlaced transmission video Ai (A2) at time t = 2 is selected and the interpolation pixel is calculated.

  A description will be given of selection of a field when the enlarged / reduced interlaced transmission video Aii2 at time t = 4 is created. The interlaced transmission video Ai (A3) at time t = 3 and the interlaced transmission video Ai (A4) at time t = 4 differ in the frame in the progressive video Ap. On the other hand, the interlaced transmission video Ai (A5) at time t = 5 and the interlaced transmission video Ai (A4) at time t = 4 have the same frame in the progressive video Ap. Therefore, when creating the enlarged / reduced interlaced transmission video Aii2 at time t = 4, the interlaced transmission video Ai (A5) at time t = 5 is selected and the interpolation pixel is calculated.

  A description will be given of selection of a field when the enlarged / reduced interlaced transmission video Aii2 at time t = 5 is created. The interlaced transmission video Ai (A4) at time t = 4 and the interlaced transmission video Ai (A5) at time t = 5 have the same frame in the progressive video Ap. On the other hand, the interlaced transmission video Ai (A6) at time t = 6 and the interlaced transmission video Ai (A5) at time t = 5 have different frames in the progressive video Ap. Therefore, when creating the enlarged / reduced interlaced transmission video Aii2 at time t = 5, the interlaced transmission video Ai (A6) at time t = 6 is selected and the interpolation pixel is calculated.

  The enlarging / reducing means 4 converts the progressive video App2 into an interlaced transmission video Aii2 and outputs it.

  FIG. 6 is an explanatory diagram showing the interpolation and composition operations of the video composition apparatus according to Embodiment 1 of the present invention. (A) The odd field indicates a case where the interlaced transmission video Ai is an odd field. (B) The even field indicates the case where the interlaced transmission video Ai is an even field.

  (A) In the case of the odd field, when the progressive video App2 is created from the interlace transmission video Ai, the vertical line of the even field of the previous field is interpolated. An interlaced transmission video Aii2 is created based on the created progressive video App2. (B) Similarly, in the case of the even field, when the progressive video App2 is created from the interlace transmission video Ai, the vertical lines of the even field of the previous field are interpolated. Based on the created progressive video App2, the interlaced transmission video Aii1 is created. In the present embodiment, an interlaced transmission video Ai having a resolution of 1080i is created from a progressive video App1 having a resolution of 480p.

  In the above case, when the progressive video App2 is created from the interlaced transmission video Ai, the progressive video App2 is created based on the field that was the same frame in the progressive video App. Therefore, the progressive video App and the progressive video App2 match.

  As described above, since the resolution is enlarged or reduced using the progressive video App2, the vertical line becomes finer when the resolution is enlarged, and a video with good image quality can be output. Since the progressive video Ap and the progressive video App2 match, the interlaced transmission video Aii2 becomes an image closer to the progressive video Ap. Accordingly, the progressive video Dp2 and the interlaced transmission video Di2 can reproduce the progressive video Ap more faithfully.

  In addition, since enlargement / reduction is performed using fields of the same frame, reproduction can be performed without returning in time, so that a smooth image can be obtained in time.

  As described above, since the composite video is generated from the field in the same frame, the primary video and the secondary video are generated from the same video even in the progressive video after the inverse 3-2 pull-down. Even when a non-progressive video is output, it is possible to output a smooth composite video because only the original video without interpolation is generated.

  Further, in the video composition device according to the present embodiment, the input video signal is once converted into 60 fields per second. Therefore, even a material originally captured at 60 Hz or a material imaged at 24 Hz like a movie can be synthesized with the same hardware configuration. Furthermore, since it can easily cope with progressive output and interlaced output, the hardware configuration on the output receiving side can be simplified. Such an operation will be described with reference to a flowchart.

  FIG. 7 is a flowchart showing the video composition operation.

  In FIG. 7, the 3-2 pull-down means 1 determines whether the input video is a progressive video of 24 frames per second (S1). In the case of progressive video at 24 frames per second, 3-2 pull-down processing is performed and output to the synthesizing means 5 (S2). Similarly, if the input video is a progressive video of 24 frames per second, the 3-2 pull-down means 2 performs 3-2 pull-down processing and outputs it to the video composition interpolation means 8 (S3).

  The 3-2 pull-down means 1 outputs the inputted video as it is to the synthesizing means 5 when the inputted video is an interlaced transmission video of 60 fields per second. Similarly, when the input video is an interlaced transmission video of 60 fields per second, the 3-2 pull-down means 2 outputs the input video as it is.

  When the input video is an interlace of 60 fields per second obtained by 3-2 pull-down of a progressive video of 24 frames per second, the video synchronous interpolation means 8 calculates an interpolation pixel based on the same field as the original frame. (S4). Even if the video input to the 3-2 pull-down means 1 and the 3-2 pull-down means 2 is already a 3-2 pull-down video of 60 fields per second, the video synchronous interpolation means 8 similarly uses the original frame. Interpolated pixels can be calculated based on the same field.

  When the video input to the 3-2 pull-down means 1 and the 3-2 pull-down means 2 is an interlace transmission video of 60 fields per second, which is a material originally captured at 60 Hz, Alternatively, the interpolation pixel is calculated with reference to the subsequent field (S5).

  Thereafter, the enlargement / reduction means 5 enlarges or reduces the input video. The synthesizing unit 5 synthesizes the output of the enlarging / reducing unit 5 and the output of the 3-2 pull-down unit 1 (S6).

  The user selects whether to output progressive video or interlaced transmission video (S7). When progressive video is selected, reverse 3-2 pull-down means 6 performs reverse 3-2 pull-down processing (S8), and the progressive video is output. When the interlace transmission video is selected, the interlace transmission video is output as it is (S9).

  As described above, even a material originally imaged at 60 Hz or a material imaged at 24 Hz like a movie can be synthesized with the same hardware configuration.

  According to this embodiment, when interpolating a 3-2 pull-down video, an interpolation pixel is created using a field that was originally the same frame, and a progressive video is created. When the video is enlarged or reduced at the time of synthesis, this progressive video can be used to output a synthesized video with a good image quality.

  In the present embodiment, the video line for creating the composite field is made using the same frame. However, the determination may be detected from the motion signal, and the information before 3-2 pull-down is recorded. It may be left.

  In the present embodiment, the progressive video Cp is input to the enlargement / reduction unit 4. However, the resolution of the progressive video Cp is detected by a separate resolution detection unit, and only resolution information is input to the enlargement / reduction unit 4. May be.

  In the present embodiment, the progressive video App2 is output to the video synchronous interpolation means 8, but the interlaced transmission video Ai and the interpolated pixel data that is data relating to the calculated interpolation pixel may be output. In this case, the enlargement / reduction means 4 creates the interlaced transmission video Aii2 based on the interlaced transmission video Ai and the interpolated pixel data. In this case, the interlaced transmission video Ai input to the enlargement / reduction means 4 may be input from the 3-2 pull-down means 2 instead of being input from the video synchronous interpolation means 8. In this case, it is not necessary to output the interlaced transmission video Ai from the video synchronous interpolation means 8.

  As shown in FIG. 2, the interlaced transmission video that has been pulled down 3-2 has 3 fields, 2 fields, 3 fields,... Repeated from the same frame. Therefore, by controlling the timing for generating the interlaced transmission video Aii2 in the enlargement / reduction means 4, or by controlling the synthesis timing by the synthesis means 5, the fields of the interlaced transmission video Ci and the interlaced transmission video Aii2 are controlled. It is also possible to match the repetition period. In this case, the image quality is further improved.

  Note that the inverse 3-2 pulldown reassembles the primary video into the original frame combination. In addition, the inverse 3-2 pulldown of the present invention is to recombine the original video original frame combination after the secondary video composition, regardless of the secondary video.

  As described above, the video signal processing apparatus according to the present invention can obtain a beautiful composite video even in interlaced transmission in which the primary video is 3-2 pulled down when creating a PinP video like a BD-ROM. Therefore, the present invention can be applied to a BD-ROM playback player and a video display device.

1 3-2 pull-down means 2 3-2 pull-down means 3 interpolation means 4 enlargement / reduction means 5 composition means 6 inverse 3-2 pull-down means 7 output selection means 8 video synchronous interpolation means

Claims (4)

When the first video signal is input and the first video signal is a progressive video signal of 24 frames per second, the 3-2 pull-down is performed and an interlaced video signal of 60 fields per second is output. When the first video signal is an interlaced video signal of 60 fields per second, a first 3-2 pull-down means for outputting the interlaced video signal of 60 fields per second as it is;
When the second video signal is input and the second video signal is a progressive video signal of 24 frames per second, the 3-2 pull-down is performed to output an interlaced video signal of 60 fields per second, A second 3-2 pull-down means for outputting the interlaced video signal at 60 fields per second as it is when the second video signal is an interlaced video signal at 60 fields per second;
Pixel rate conversion means for converting the video signal output from the second 3-2 pull-down means to the same video pixel transmission speed as the first video signal, and outputting the same.
A video synthesizing apparatus comprising: a synthesizing unit that synthesizes and outputs the video signal output from the first 3-2 pull-down unit and the video signal output from the pixel rate conversion unit. The pixel rate conversion means includes:
When the interlaced video signal of 60 fields per second output from the second 3-2 pull-down means is interpolated, it is interpolated based on the current field and the previous or subsequent field, and converted to a progressive video signal of 60 frames per second. Interpolation means;
Enlarge or reduce the video signal output from the interpolation means,
Enlargement / reduction means for converting and outputting the transmission speed of video pixels into an interlaced video signal of 60 fields per second, the same as the first video signal;
The video composition device according to claim 1, comprising: The pixel rate conversion means includes:
When interlaced video signals of 60 fields per second output from the second 3-2 pull-down means are interpolated, interpolation is performed based on fields that are the same frames as the current field and the current frame, and progressive video of 60 frames per second. Video synchronous interpolation means for converting to a signal;
Enlargement / reduction means for enlarging or reducing the video signal output from the video synchronous interpolation means, converting the output speed of video pixels into an interlaced video signal of 60 fields per second, the same as the first video signal, and
The video composition device according to claim 1, comprising: An inverse 3-2 pull-down means for inversely pulling down the video signal output from the combining means;
Output means for selecting and outputting either the video signal output from the synthesizing means or the video signal output from the inverse 3-2 pull-down means;
The video composition device according to claim 1, comprising:

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