JP2009232087A - Video information reproducing device and method, video information reproducing system, control method for video information reproducing system, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reproduce video information such as movie content recorded in a large-capacity information recording medium such as a Blu-ray Disc (R) with high image quality and high definition. <P>SOLUTION: A video information reproducing device (100) is provided with a first conversion means (101) for converting first video information into second information of a second format using a field included in a frame as a unit, a correction means (104) for correcting an abnormal part in which a combination of fields constituting the second video information is abnormal, a second conversion means (102) for converting the corrected abnormal part and a normal part in which a combination of the fields included in the second video information is normal, into third video information of a first format, and a reproducing means (105) for reproducing the third video information. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention belongs to the technical field of a video information playback apparatus and method for playing back or displaying video information such as movie content, a video information playback system, a control method for the video information playback system, and a computer program.

  In recent years, in large-capacity information recording media such as Blu-ray Disc and HD DVD, for example, video materials such as movie content, so-called video content, for example, 1080, 720 or 480 effective pixels in the vertical direction, The number is 576 and is recorded in conformity with the progressive method in units of frames.

  In a video decoder mounted on a video information recording / reproducing apparatus such as a DVD player or a BD (Blu-ray Disc) player for reproducing these large-capacity information recording media, a video signal (so-called video signal) and an audio signal are used. A so-called audio signal is decoded and output in response to the designation of a playback time in the stream. The video signal included in the video signal is a compressed signal that complies with MPEG (Moving Picture Expert Group) 2, MPEG-4 AVC, VC-1, etc., so a decoder (decoding is supported). Device). Signals output from decoders that support these methods are generally 60 or 59.94 fields or 50 fields per second (interlace), or 60 or 59.94 frames or 50 frames per second. Alternatively, a 24 or 23.976 frame progressive (progressive) signal.

  Some special video information recording / playback devices further calculate interlaced output signals output from decoders that support these methods, and progressively 60, 59.94 or 50 frames per second. It has a function of performing so-called IP conversion (interlace progressive conversion), which is converted into a signal and output. Specifically, when this special video information recording / reproducing apparatus performs this IP conversion, for example, it detects or extracts signal characteristics (or signal characteristics) of an image such as luminance, and determines various frame structures. Image processing is performed.

  On the other hand, in Patent Document 1 and Non-Patent Document 1, etc., in the video information reproducing apparatus, after the input video content conforming to the progressive method is converted into the video content conforming to the interlace method, it is converted again to the progressive method. A technology related to an IC (Integrated Circuit) having a function of outputting data is also disclosed.

Title: SOURCE-ADAPTIVE VIDEO DEINTERLACER at US PTO (United States Patent Office), US2007052846 SOURCE-ADAPTIVE VIDEO DEINTERLACER at Document No.:20070052846 esp @ cenet (European Patent DB) ABT2010 is a product of semiconductor from Anchor Bay Technology (Internet http://www.anchorbaytech.com/)

  However, in some information recording media, a combination of fields constituting a frame is improperly recorded in a content production stage such as a process of editing and recording video content, a so-called authoring process. For video content recorded on such an information recording medium, for example, when a video information playback device such as a BD player plays back the video content without performing various processing processes such as image processing, Due to the improper combination of the fields that make up the frame, for example, when the video is moving, comb-shaped noise, so-called combing, occurs at the edge of the video, which This causes a technical problem that the combing is visually recognized.

  In addition, the techniques described in Patent Document 1 and Non-Patent Document 1 described above are based on progressive video (such as 60 or 59.94 frames or 50 frames per second) generated from interlaced content by an IP conversion device with poor performance. The video quality is improved and output at 60, 59.94 or 50 frames per second. In addition, this technology is technically capable of determining whether the original authored video is, for example, video authored at 24 frames per second or video authored at 30 frames per second. It becomes difficult. For this reason, there is a technical problem that it is difficult to improve the quality of the original authoring video and output it in the same format as the authoring video (for example, 1080p 24 Hz).

  The present invention relates to a video information reproducing apparatus and method capable of reproducing video information such as movie content recorded in a large capacity information recording medium such as a Blu-ray Disc with high image quality and high quality. It is an object of the present invention to provide a video information reproduction system, a control method for the video information reproduction system, and a computer program.

  In order to solve the above problem, a video information reproducing apparatus according to claim 1 is a video information reproducing apparatus for reproducing first video information recorded in a first format in units of frames on an information recording medium. A combination of the first conversion means for converting the first video information into second video information in a second format in units of fields included in the frame and the field constituting the second video information is abnormal. A correction unit that corrects a certain abnormal part, the corrected abnormal part, and a normal part in which the combination of the fields included in the second video information is normal is converted into third video information of the first format. Second conversion means for playing back, and playback means for playing back the third video information.

  In order to solve the above problem, a video information reproducing system according to claim 7 is a video information reproducing device for reproducing first video information recorded in an information recording medium in a first format in units of frames. A combination of the first conversion means for converting the first video information into second video information in a second format in units of fields included in the frame and the field constituting the second video information is abnormal. A correction unit that corrects a certain abnormal part, the corrected abnormal part, and a normal part in which the combination of the fields included in the second video information is normal is converted into third video information of the first format. Second converting means, reproducing means for reproducing the third video information, and display means for displaying the reproduced third video information.

  In order to solve the above problem, the video information reproducing method according to claim 8 is the video information in the video information reproducing apparatus for reproducing the first video information recorded in the first format in units of frames on the information recording medium. A reproduction method, wherein the first video information is converted into second video information of a second format in units of fields included in the frame, and the fields constituting the second video information A correction step of correcting an abnormal part in which the combination of the first part is abnormal, a normal part in which the combination of the corrected abnormal part and the field included in the second video information is normal A second conversion step for converting into the three video information, and a reproduction step for reproducing the third video information.

  In order to solve the above-mentioned problem, the control method of the video information reproduction system according to claim 9 reproduces and displays the first video information recorded in the first format in units of frames on the information recording medium. A control method in a playback system, comprising: a first conversion step of converting the first video information into second video information of a second format in units of fields included in the frame; and the second video information A correction step of correcting an abnormal portion in which the combination of the fields is abnormal, a normal portion in which the combination of the corrected abnormal portion and the field included in the second video information is normal, A second conversion step for converting the third video information into a format; a reproduction step for reproducing the third video information; and a display step for displaying the reproduced third video information.

  In order to solve the above problem, a computer program according to claim 10 is a computer program for control for controlling a computer provided in the video information reproducing apparatus according to claim 1, wherein the computer is stored in the computer program. It functions as at least a part of the first conversion means, the correction means, the second conversion means, and the reproduction means.

  In order to solve the above problem, a computer program according to claim 11 is a computer program for control for controlling a computer provided in the video information reproduction system according to claim 7, wherein the computer is It functions as at least a part of the first conversion means, the correction means, the second conversion means, the reproduction means, and the display means.

  The operation and other advantages of the present invention will become apparent from the embodiments described below.

  Hereinafter, a video information playback apparatus and method, a video information playback system, and a control method of the video information playback system according to embodiments of the present invention as the best mode for carrying out the invention will be described in order.

(Embodiment of video information reproducing apparatus)
Hereinafter, a video information reproducing apparatus according to an embodiment of the present invention will be described.

  An embodiment of the video information playback apparatus according to the present invention is a video information playback apparatus that plays back first video information recorded in a first format in units of frames on an information recording medium, wherein the first video information is stored in the first video information. First correction means for converting into second video information of the second format in units of fields included in the frame, and correction for correcting an abnormal part in which the combination of the fields constituting the second video information is abnormal A second conversion means for converting the corrected abnormal part and the normal part in which the combination of the fields included in the second video information is normal into the third video information of the first format; Playback means for playing back the third video information.

  According to the embodiment of the video information reproducing apparatus of the present invention, generally, in a large-capacity information recording medium such as Blu-ray Disc and HD DVD, for example, video material such as movie content, so-called video content is stored. For example, the effective pixels in the vertical direction are 1080, 720, 480, and 576, and are recorded in conformity with a first format such as a progressive method in units of frames. Then, the first video information in the first format in units of frames is played back by the video information playback device. This first video information (and second and third video information to be described later) may mean video information to be reproduced as a main purpose such as movie content, for example, picture-in-picture, subtitle, user, etc. It may also mean video information that is reproduced in a secondary manner, such as operation menu information for performing an operation according to.

  According to this embodiment, first, this first video information is converted by the first conversion means into second video information of the second format in units of fields included in the frame.

  Next, an abnormal portion where the combination of fields constituting the second video information is abnormal is corrected by the correcting means. Here, “the combination is abnormal” according to the present invention means that the combination of the frame constituting the first video information and the field constituting the second video information is in the content production stage such as during the authoring process. It means that it is different from the desired combination due to a defect. A specific example of a state in which the combination is abnormal is a state in which one odd field constituting one frame is replaced by another odd field constituting another frame located in the past on the time axis. It's okay. Alternatively, as a specific example of a state where the combination is abnormal, a state in which one even field constituting one frame is replaced with another even field constituting another frame located in the future on the time axis May be mentioned. Further, “corrected” or “correction processing is performed” according to the present invention means that (i) a frame in which a combination of fields is corrected based on the logical continuity of fields, or (ii) a field is a still image Using a frame that has been processed or (iii) IP conversion based on signal characteristics, that is, a frame that has been subjected to IP conversion by video processing, to replace the originally abnormal frame with a frame that has been appropriately subjected to appropriate video processing. May mean. Furthermore, the “signal characteristics” (or “image feature”) according to the present invention is, for example, luminance, color, motion amount, motion vector, complexity, information amount for encoding processing, encoding It means the characteristics of the image constituting the video signal, such as the degree of difficulty, and the signal processing characteristics.

  Next, the second conversion means converts the corrected abnormal part and the normal part in which the combination of fields included in the second video information is normal into the third video information of the first format. Next, the third video information is reproduced by the reproducing means.

  If various processes as described above are not performed, a frame is formed in a content production stage such as a process of editing and recording video content on some information recording media, so-called authoring process. It becomes almost impossible or completely impossible to cope with a state where a combination of fields to be recorded is improperly recorded. In other words, for example, a video information reproducing apparatus such as a Blu-ray Disc player does not perform various processing processes such as image processing on the video content recorded on the information recording medium. When played back, comb-shaped noise (so-called combing) is generated at the edge of the video image when the video is moving, for example, due to an improper combination of the fields that make up the frame. Thus, this combing is visually recognized by the viewer.

  On the other hand, according to the present embodiment, first, the first conversion unit converts the first video information into second video information of the second format in units of fields included in the frame. Next, an abnormal portion where the combination of fields constituting the second video information is abnormal is corrected by the correcting means. Next, the corrected abnormal portion and the normal portion in which the combination of fields included in the second video information is normal are converted into the first format third video information by the second conversion means. Next, the third video information is reproduced by the reproducing means.

  As a result, it is possible to appropriately associate the combination of the frame constituting the first video information in the first format and the field constituting the second video information in the second format. Therefore, for example, when the video is moving, comb-shaped noise, so-called combing, is generated at the edge of the video image due to an inappropriate combination of fields constituting the frame. It is possible to prevent this almost or completely. In addition, it is possible to almost or completely prevent the viewer from seeing this combing.

  As a result of the above, the first video information such as movie content recorded on a large-capacity information recording medium such as a Blu-ray Disc is recorded in conformity with the first format such as a progressive method in units of frames. It is possible to realize reproduction with high image quality and high quality.

  In an aspect of the embodiment of the video information reproducing apparatus of the present invention, the video information reproducing apparatus further includes a detecting unit that detects the abnormal part, and the correcting unit corrects the detected abnormal part.

  According to this aspect, following the conversion by the first conversion unit described above, the detection unit detects an abnormal portion in which the combination of fields constituting the second video information is abnormal. Next, the detected abnormal portion is corrected by the correcting means.

  As a result, the detected abnormal part can be corrected appropriately.

  In another aspect of the embodiment of the video information reproducing apparatus of the present invention, the correcting means (i) in addition to or instead of correcting the abnormal portion based on the logical continuity of the field. (Ii) The abnormal portion is corrected based on the signal characteristics of the still image in which the field is image-processed.

  According to this aspect, it is possible to appropriately and promptly perform the correction process on the abnormal part, appropriately corresponding to the recording format of the video signal in the information recording medium. Specifically, when there is some advantage in signal processing between the recording format of the video signal in the information recording medium and the image processing in the video information reproducing apparatus, the field is based on the signal characteristics of the still image subjected to the image processing. Thus, it is possible to perform correction processing appropriately and quickly for abnormal portions.

  In another aspect of the embodiment of the video information reproducing apparatus of the present invention, the video information reproducing apparatus further includes a specifying unit that specifies a temporal or spatial position where the possibility of occurrence of the abnormal portion is relatively high, and the correcting unit includes The abnormal portion is corrected based on the specified position.

  According to this aspect, a database capable of recording various kinds of position information for specifying a temporal or spatial position where the possibility of occurrence of an abnormal part is relatively high is stored in the above-described memory unit and specified. Means may be configured. As a result, the correction unit can appropriately and quickly perform the correction process on the abnormal portion based on the specified position.

  In another aspect of the embodiment of the video information reproducing apparatus of the present invention, the second conversion means, when the second format is a format in which the two frames are constituted by five fields, The abnormal field and the normal part are converted into the third video information by converting the five fields into the two frames or the five frames.

  According to this aspect, the second conversion means can convert the abnormal part and the normal part into the third video information appropriately corresponding to various aspects of the second format such as a so-called 2-3 sequence. It is.

  In another aspect of the embodiment of the video information reproducing apparatus of the present invention, the second conversion means, when the second format is a format in which the two frames are constituted by four fields, The abnormal field and the normal part are converted into the third video information by converting the four fields into the two frames or the four frames.

  According to this aspect, the second conversion means can convert the abnormal part and the normal part into the third video information appropriately corresponding to various aspects of the second format such as a so-called 2-2 sequence. It is.

(Embodiment of video information reproduction system)
Hereinafter, a video information reproducing system according to an embodiment of the present invention will be described.

  An embodiment of the video information playback system according to the present invention is a video information playback apparatus for playing back first video information recorded in a first format in units of frames on an information recording medium, wherein the first video information is stored in the first video information. First correction means for converting into second video information of the second format in units of fields included in the frame, and correction for correcting an abnormal part in which the combination of the fields constituting the second video information is abnormal A second conversion means for converting the corrected abnormal part and the normal part in which the combination of the fields included in the second video information is normal into the third video information of the first format; Reproducing means for reproducing the third video information and display means for displaying the reproduced third video information.

According to the embodiment of the video information reproduction system of the present invention, in addition to the first conversion means, the correction means, the second conversion means, and the reproduction means included in the video information reproduction apparatus described above, As a result of the above, in a video information playback system having a video information playback device and a display means, a large capacity information recording medium such as a Blu-ray Disc is provided. It is possible to reproduce the first video information, such as movie content, recorded in conformity with the first format such as a progressive method in units of frames, with high image quality and high quality.

(Embodiment of video information reproduction method)
Hereinafter, a video information reproducing method according to an embodiment of the present invention will be described.

  An embodiment of the video information playback method of the present invention is a video information playback method in a video information playback device for playing back first video information recorded in a first format in units of frames on an information recording medium, An abnormality in which a combination of the first conversion step of converting the first video information into second video information of the second format in units of fields included in the frame and the field constituting the second video information is abnormal A correction step of correcting a portion, a corrected abnormal portion, and a normal portion in which the combination of the fields included in the second video information is normal is converted into third video information of the first format. 2 conversion steps and a reproduction step of reproducing the third video information.

  According to the embodiment of the video information reproducing method of the present invention, it is possible to receive various benefits of the above-described embodiment of the video information reproducing apparatus of the present invention.

  Incidentally, in response to the various aspects of the embodiment of the video information reproducing apparatus of the present invention described above, the embodiment of the video information reproducing method of the present invention can also adopt various aspects.

(Embodiment of control method of video information reproduction system)
Hereinafter, a control method of the video information reproducing system according to the embodiment of the present invention will be described.

  An embodiment according to a control method of a video information playback system of the present invention is a control method in a video information playback system that plays back and displays first video information recorded in a first format in units of frames on an information recording medium. The first conversion step of converting the first video information into second video information of the second format in units of fields included in the frame, and the combination of the fields constituting the second video information is abnormal. A normal part in which the combination of the corrected abnormal part and the field included in the second video information is normal is converted into the third video information of the first format. A second conversion step for converting; a reproduction step for reproducing the third video information; and a display step for displaying the reproduced third video information.

  According to the embodiment of the video information playback system control method of the present invention, it is possible to receive various benefits of the above-described embodiment of the video information playback system of the present invention.

  Incidentally, in response to the various aspects of the embodiment of the video information reproduction system of the present invention described above, the embodiment of the video information reproduction system of the present invention can also adopt various aspects.

(Embodiment of computer program)
The computer program according to the embodiment of the present invention will be described below.

  The control computer program of the present invention is a control computer program for controlling a computer provided in the above-described embodiment (including various aspects thereof) of the video information reproducing apparatus of the present invention, A computer is caused to function as at least part of the first conversion unit, the correction unit, the second conversion unit, and the reproduction unit.

  The control computer program of the present invention is a control computer program for controlling a computer provided in the above-described embodiment (including various aspects thereof) of the video information reproduction system of the present invention, A computer is caused to function as at least a part of the first conversion unit, the correction unit, the second conversion unit, the reproduction unit, and the display unit.

  According to the embodiment of the computer program according to the present invention, the computer program is read from a recording medium such as a ROM, a CD-ROM, a DVD-ROM, and a hard disk that stores the computer program, and is executed. If the computer program is downloaded to a computer via communication means and executed, the above-described embodiments of the video information playback apparatus and video information playback system of the present invention can be realized relatively easily.

  Incidentally, in response to the various aspects of the embodiments of the video information reproducing apparatus and the video information reproducing system of the present invention described above, the embodiments of the computer program of the present invention can also adopt various aspects.

  Such an operation and other advantages of the present embodiment will be clarified from examples described below.

  As described above, according to the embodiment of the video information reproducing apparatus and method of the present invention, the first converting means and process, the correcting means and process, the second converting means and process, and the reproducing means and process are provided. . As a result, for example, first video information such as movie content recorded on a large-capacity information recording medium such as a Blu-ray Disc in conformity with a first format such as a progressive method in units of frames, It is possible to reproduce with high image quality and high quality.

  As described above, according to the embodiment of the video information reproduction system and the control method of the system of the present invention, the first conversion means and process, the correction means and process, the second conversion means and process, the reproduction means and process. , And display means and steps. As a result, in a video information playback system having a video information playback device and display means, for example, a large-capacity information recording medium such as a Blu-ray Disc, which conforms to the first format such as a progressive method in units of frames. For example, it is possible to reproduce the first video information such as movie content recorded with high image quality and high quality.

  As described above, according to the embodiment of the computer program of the present invention, the computer functions as the above-described embodiment of the video information playback apparatus and the video information playback system of the present invention. For example, movie content recorded on a large-capacity information recording medium such as a Blu-ray Disc in accordance with a first format such as a progressive method in units of frames using the apparatus and the video information playback system. It is possible to reproduce the first video information such as high quality and high quality.

  Embodiments of the present invention will be described below with reference to the drawings.

(1) Outline of encoding and decoding in video signal holding video information
First, an outline of a video signal holding general video information will be described with reference to FIG. FIG. 1 is a schematic diagram schematically showing an outline of encoding and decoding in the video signal holding the video information according to the present embodiment.

  As shown in FIG. 1, generally, a video signal that holds video information, that is, a so-called digital video signal has a very large amount of information. For this reason, when the digital video signal is to be recorded for a long time on a recording medium with a small amount of storage information (storage capacity), or when the digital video signal is recorded in a communication channel with a limited communication capacity, In order to transmit with the number of channels, it is essential to reduce the amount of information by encoding the digital video signal with high efficiency. In order to meet such a demand, a high-efficiency encoding method using correlation of video signals has been proposed, and one of them is a so-called MPEG (Moving Picture Expert Group) method. This MPEG method first reduces the redundancy in the time axis direction by taking the difference between frames of the video signal, and then reduces the redundancy in the spatial axis direction using an orthogonal transformation method such as discrete cosine transform (DCT). To efficiently encode the video signal.

  In the encoding process based on the MPEG system, as shown in FIG. 1, a sub-video signal that holds sub-video information that is a sub-picture information that is an audio signal, for example, a “human image”, is provided by various encoders. Main video holding main video information composed of three types of images (pictures) such as I picture, P picture or B picture, which are character signals such as subtitles of “Sky”, for example, “images of landscapes of mountains and trees” The signals and scene composing signals constituting the image scene are compressed and encoded. Then, these compressed and encoded audio signals, sub-video signals, character signals such as captions, main video signals, and scene configuration signals are multiplexed and transmitted.

  Next, the transmitted and encoded audio signal, sub-video signal, subtitle signal, main video signal, and scene composition signal are separated, output to various decoders, and decompressed. Decrypted.

  Next, based on the decompressed and decoded scene composition signal, the decompressed and decoded audio signal, sub-video signal, character signal such as subtitle, and main video signal are combined and displayed on a display monitor, for example. Displayed by the device.

(1-1) Period of video signal holding video information
Next, with reference to FIG. 2, the outline of the period of the video signal holding the video information of the present invention will be described. FIG. 2 schematically shows a comparison between a frame period in a movie film that is a reference for determining a period of a video signal holding video information according to the present invention and a frame period in an NTSC video, for example. It is a schematic diagram.

  As shown in FIG. 2, the frame period in motion picture film is “1/24” seconds. On the other hand, the frame period in NTSC video is “1/30” second. Therefore, the time of 4 frames of movie film, that is, “4/24” seconds (1/6 second), and the time of 5 frames of NTSC video, that is, “5/30” seconds (1/6 second). Are equal.

  Specifically, in order to display a motion picture film having a frame period of “1/24” seconds as an NTSC video having a frame period of “1/30” seconds, a 2-3 pull-down process is performed. . That is, the first frame in the movie film is displayed as two fields, and the second frame is displayed as three fields. As a result of the 2-3 pull-down process, a movie film having a frame period of “1/24” seconds is converted into an NTSC video field having a frame period of “1/30” seconds. Specifically, in a movie film, 12 frames, which are half of 24 frames per second, are divided into two NTSC video fields, and the other 12 frames are divided into 3 NTSC video fields. Since it is divided into video fields, it is divided into 60 fields per second from the following equation (1).

(2 × 12) + (3 × 12) = 60 (1)
In detail, an encoder compliant with the MPEG system sets a “repeat_first_field flag” for every five fields in an NTSC video field, and instructs the decoder to repeat the field. Based on this “repeat_first_field flag”, so-called 2-3 pull-down processing can be performed.

(2) Basic configuration
Next, with reference to FIG. 3, description will be given on the basic configuration of the video reproduction apparatus according to the present embodiment. FIG. 3 is a block diagram conceptually showing the basic structure of the video recording / reproducing apparatus in the first example of the video reproducing apparatus of the present invention.

  As shown in FIG. 3, the video recording / reproducing apparatus 100 includes a first conversion unit 101, a second conversion unit 102, a detection unit 103, a correction unit 104, and a reproduction unit 105.

  The first conversion unit 101 converts, for example, the first video information compliant with the progressive method (24p) in units of 24 frames per second into the interlace method (60i) compliant with, for example, 60 fields per second. The first conversion processing is performed to convert the video information into the second video information that conforms to the interlace method (48i) in units of 2 video information or 48 fields per second, for example.

  The 2nd conversion means 102 performs the 2nd conversion process (what is called film IP conversion) mentioned later.

  The detecting means 103 detects an abnormal part in a field to be described later.

  The correction unit 104 performs correction processing described later. The correcting unit 104 constitutes an example of a correcting unit and a specifying unit according to the present invention.

  The reproduction means 105 is, for example, third video information compliant with the progressive method (60p) in units of 60 frames per second, or third video compliant with the progressive method (24p), for example, in units of 24 frames per second. Play information.

(4) Detailed operation principle
Next, the operation principle of the video recording / reproducing apparatus according to the first embodiment of the video reproducing apparatus of the present invention will be described with reference to FIGS. In particular, with reference to FIG. 4 and FIG. 5, a description will be given of a case where there is no abnormal part in the first video information where the combination of fields constituting the second video information obtained by converting the first video information is abnormal. . FIG. 4 is a flowchart showing the flow of the first conversion process, the second conversion process, and the correction process by the video recording / playback apparatus according to the first embodiment of the video playback apparatus of the present invention. FIG. 5 is a diagram showing the correspondence between frames and fields constituting video information when the first and second conversion processes are performed when there is no abnormal part according to the first embodiment of the video reproducing apparatus of the present invention. FIG.

(4-1) When there is no abnormal part
As shown in FIG. 4, for example, the first video information compliant with the progressive method (24p) in units of 24 frames per second is compliant with the interlace method (60i) in units of 60 fields per second, for example. A first conversion process for converting into second video information is performed (step S101).

  Specifically, as shown in the upper part of FIG. 5, for example, a frame (Frame) included in the first video information recorded in accordance with the progressive method is a second image in accordance with the interlace method, for example. It is converted into a field that constitutes information. That is, two frames constituting the first video information of the progressive method are converted into five fields constituting the second video information of the interlace method. More specifically, a frame “A” (Frame A) constituting the first video information in the progressive format is divided into a field “A” top and a field “A” bot constituting the second video information in the interlace format. Converted. “Top” means an odd-numbered line in the frame, and “bot” means an even-numbered line in the frame. Further, the frame “B” (Frame B) constituting the first video information in the progressive format is converted into the field “B” top and the field “B” bot constituting the second video information in the interlace format. Furthermore, the field “B” top is duplicated, in other words, repeated, and only one field “B” top is added.

  In substantially the same manner, the frame “C” (Frame C) constituting the first video information in the progressive format is converted into the field “C” bot and the field “C” top constituting the second video information in the interlace format. Is done. Further, the frame “D” (Frame D) constituting the first video information in the progressive format is converted into the field “D” bot and the field “D” top constituting the second video information in the interlace format. Furthermore, the field “D” bot is duplicated, in other words, repeated, and only one field “D” bot is added.

  Next, it is determined whether or not an abnormal part is detected (step S102). Here, when it is not determined that an abnormal portion is detected (step S102: No), a second conversion process (so-called film IP conversion) is performed (step S103). Specifically, as shown in the lower part from the center portion in FIG. 5, for example, the fields constituting the second video information compliant with the interlace method constitute the third video information compliant with the progressive method, for example. Converted to a frame. That is, the five fields constituting the interlaced second video information are converted into the five frames constituting the progressive third video information. More specifically, the field “A” top and the field “A” bot constituting the second video information of the interlace format are converted into the frame “A” constituting the third video information of the progressive format, respectively. . “Top” means an odd-numbered position on the time axis, and “bot” means an even-numbered position on the time axis. Further, the field “B” top and the field “B” bot constituting the second video information of the interlace format are converted into the frame “B” constituting the third video information of the progressive format, respectively.

  In substantially the same manner, the field “C” bot constituting the second video information of the interlace format and the field “C” top are converted into the frame “C” constituting the third video information of the progressive format, respectively. Further, the field “D” bot and the field “D” top constituting the second video information of the interlace format are converted into the frame “D” constituting the third video information of the progressive format, respectively.

(4-2) When an abnormal part exists
Next, with reference to FIG. 4 and FIG. 6 described above, a case where this abnormal portion exists in the first video information will be described. FIG. 6 shows frames constituting video information when the first and second conversion processes and the correction process are performed in the case where an abnormal part is present according to the first embodiment of the video reproduction apparatus of the present invention. It is a schematic diagram which shows the correspondence with a field diagrammatically.

  As shown in FIG. 4 described above, the first conversion process described above is performed by the first conversion means (step S101). Specifically, as shown in the upper part of FIG. 6, before the first conversion process is performed, the first video information of the progressive system is configured in the first video information in which the abnormal part exists. A frame “A” (Frame A) includes a field “A” top and a field “A” bot. Further, a frame “B” (Frame B) constituting the first video information of the progressive method is configured by a field “A” top and a field “B” bot. In particular, in this field “A” top, the part where field “A” top is inserted instead of field “B” top is an abnormal part.

  In substantially the same manner, a frame “C” (Frame C) constituting the first video information of the progressive method is composed of a field “B” top and a field “C” bot. In particular, in this field “B” top, a portion where field “B” top is inserted instead of field “C” top is an abnormal portion. Further, a frame “D” (Frame D) constituting the first video information of the progressive system is configured by a field “D” bot and a field “D” top.

  Then, this first conversion process is performed, and as shown in the center part from the upper part in FIG. 6, for example, a frame (Frame) constituting the first video information recorded in accordance with the progressive method is For example, it is converted into a field constituting the second video information conforming to the interlace method. Specifically, as shown from the upper part to the center part in FIG. 6, the frame “A” (Frame A) constituting the first video information of the progressive system constitutes the second video information of the interlace system. It is converted into the field “A” top and the field “A” bot. Further, the frame “B” (Frame B) constituting the first video information of the progressive format includes the field “A” top and the field “B” bot which are the abnormal portions constituting the second video information of the interlace format. Is converted to Furthermore, the field “A” top which is an abnormal part is duplicated, in other words, repeated (Repeat), and only one field “A” top which is an abnormal part is added.

  In substantially the same manner, the frame “C” (Frame C) constituting the first video information in the progressive format is the field “C” bot constituting the second video information in the interlace format and the field “B” which is an abnormal part. converted to top. Further, the frame “D” (Frame D) constituting the first video information in the progressive format is converted into the field “D” bot and the field “D” top constituting the second video information in the interlace format. Furthermore, the field “D” bot is duplicated, in other words, repeated, and only one field “D” bot is added.

  Next, as described above, it is determined whether or not an abnormal part is detected (step S102). Here, when it is determined that an abnormal part is detected (step S102: Yes), the second conversion process and the correction process are performed (step S104). Specifically, as shown in the lower part from the center portion in FIG. 6, for example, the fields constituting the second video information compliant with the interlace format constitute the third video information compliant with the progressive format, for example. The frame is converted while being corrected. That is, the five fields constituting the interlaced second video information are converted to the five frames constituting the progressive first video information while being corrected.

  More specifically, the field “A” top and the field “A” bot constituting the second video information of the interlace format are converted into the frame “A” constituting the third video information of the progressive format, respectively. . Further, the correction process is performed on the field that is an abnormal part constituting the second video information of the interlace method, and the frames “B1”, “B2”, and “B3” constituting the third video information of the progressive method are processed. Converted. Further, a database capable of recording various kinds of position information for specifying a temporal or spatial position where the possibility of occurrence of an abnormal part is relatively high may be stored in the memory unit described above. As a result, the correction unit can appropriately and quickly perform the correction process on the abnormal portion based on the specified position.

  In substantially the same manner, the fields “C” bot and “B” top constituting the second video information of the interlace format are corrected, and the frames “C1” and “C2” constituting the third video information of the progressive format are processed. Respectively. Further, the field “D” bot and the field “D” top constituting the second video information of the interlace format are converted into the frame “D” constituting the third video information of the progressive format, respectively.

(4-3) When there is no abnormal part and when there is an abnormal part
Next, it is determined whether or not the second conversion process is completed (step S105). Here, when it is determined that the second conversion process is completed (step S105: Yes), for example, whether or not to reproduce the third video information based on the progressive method (60p) in units of 60 frames per second. Is determined (step S106). If it is determined that the third video information compliant with the progressive method (60p) is to be reproduced (step S106: Yes), the third video compliant with the progressive method (60p) with 60 frames per second as a unit. Information is reproduced (step S107).

  On the other hand, if it is not determined that the third video information conforming to the progressive method (60p) in units of 60 frames per second is reproduced as a result of the determination in step S106 described above (step S106: No), for example, 24 per second The third video information compliant with the progressive method (24p) in units of frames is reproduced (step S108). In particular, in step S108, a process may be performed in which five frames constituting the progressive third video information are converted into two frames constituting the progressive third video information. . In step S108 described above, for example, the third video information that conforms to the progressive method (30p) in units of 30 frames per second may be reproduced.

(5) Examination of operation and effect of this embodiment
Next, with reference to FIG. 7, the operation and effect of the present embodiment will be examined. FIG. 7 is a schematic diagram (FIG. 7A) schematically showing a frame in which the third video information of the progressive method is reproduced when the correction process according to the present embodiment is performed, and a comparison. FIG. 7B is a schematic diagram (FIG. 7B) schematically showing a frame in which progressive type third video information is reproduced according to an example.

  According to the present embodiment, as described above, the corrected abnormal part and the normal part in which the combination of the fields included in the second video information is normal are converted into the progressive third video information. Next, the third video information is reproduced by the reproducing means. Therefore, as shown in FIG. 7A, for example, when a “cat's hand moving his / her hand to the left / right” moves on the screen, a comb-shaped noise, so-called, is added to the edge of the image. , Combing can be prevented almost or completely.

  If the correction process as described above is not performed, in some information recording media, a combination of fields constituting a frame is not included in a process of editing and recording video content, a so-called authoring process. It becomes almost impossible or completely impossible to respond to a properly recorded state. In other words, when a video information playback device such as a BD player plays back the video content recorded on the information recording medium without performing various processing processes such as image processing, for example. For example, when the video is moving, for example, comb-shaped noise (so-called combing) is generated at the edge of the video image due to an inappropriate combination of fields constituting the frame. Therefore, this combing is visually recognized by the viewer. Specifically, as shown in FIG. 7B, for example, when a “cat's hand moving its hand to the left or right” moves on the screen, a comb-like shape is formed at the edge of this image. Noise, so-called combing, occurs.

  On the other hand, according to the present embodiment, the corrected abnormal part and the normal part in which the combination of the fields included in the second video information is normal are converted into the progressive third video information. Next, the third video information is reproduced by the reproducing means.

  As a result, it is possible to appropriately associate a combination of a frame constituting the progressive video information and a field constituting the interlaced second video information. Therefore, for example, when the video is moving, for example, comb-shaped noise, so-called combing, is generated at the edge of the image due to an inappropriate combination of fields constituting the frame. Can be prevented almost or completely. In addition, it is possible to almost or completely prevent the viewer from seeing this combing.

  As a result, the first video information such as movie content recorded on a large-capacity information recording medium such as a Blu-ray Disc in accordance with the progressive method in units of frames, for example, has high image quality and high quality. It is feasible to play with quality.

  In addition, the video information reproducing apparatus according to the present embodiment reproduces the information recording medium and receives the video signal recorded on the information recording medium instead of receiving and reproducing the video signal carried by the carrier wave. You can play it. As a result, the abnormal portion is detected with high accuracy in an appropriate manner corresponding to the recording format of the video signal in the information recording medium, and the abnormal portion is appropriately coped with in the recording format of the video signal in the information recording medium. Thus, the correction process can be performed appropriately and quickly. Specifically, the recording format of the video signal on the information recording medium can appropriately and quickly correct the abnormal part based on the logical continuity of fields such as 2-3 sequences. It is. Alternatively, if the recording format of the video signal in the information recording medium and the image processing in the video information reproducing apparatus have some advantages in signal processing, the abnormal portion is determined based on the signal characteristics of the still image that has been subjected to image processing. It is possible to perform correction processing appropriately and quickly.

  In addition, in the correction process, it is possible to estimate a normal part by combining one field that is a normal part among a plurality of fields included in the abnormal part and another field that is a normal part in a similar manner. In addition, a new frame that can be replaced with an abnormal part may be created. Alternatively, it is possible to estimate a normal part based on one field that is a normal part among a plurality of fields included in the abnormal part and another field that is a normal part in a similar manner. You may create a new frame that can exclude.

  In contrast to the techniques described in Patent Document 1 and Non-Patent Document 1 described above, according to the present embodiment, the information is originally authored by a progressive method of 24 or 23.976 frames and recorded on a medium such as a disk. On the other hand, since it is possible to improve the video quality and output in the same video format as the authoring video, it is very useful in practice.

(6) Second embodiment
Next, the operation principle of the video recording / playback apparatus according to the second embodiment of the video playback apparatus of the present invention will be described with reference to FIG. 4 as appropriate in addition to FIGS. 8 and 9. In particular, referring to FIG. 4 and FIG. 8 described above, in the first video information, there is no abnormal part where the combination of fields constituting the second video information obtained by converting the first video information is abnormal. explain. FIG. 8 is a diagram illustrating the correspondence between frames and fields constituting video information when the first and second conversion processes are performed when there is no abnormal portion according to the second embodiment of the video reproduction apparatus of the present invention. FIG.

(6-1) When there is no abnormal part
As shown in FIG. 4, the first video information compliant with the progressive method (24p) in units of 24 frames per second is converted into the interlace method (48i) in units of 48 fields per second, for example. A first conversion process for converting into compliant second video information is performed (step S101).

  Specifically, as shown in the upper part of FIG. 8, for example, a frame (Frame) included in the first video information recorded in accordance with the progressive method is a second image in accordance with the interlace method, for example. It is converted into a field that constitutes information. That is, two frames constituting the first video information of the progressive method are converted into four fields constituting the second video information of the interlace method. More specifically, a frame “A” (Frame A) constituting the first video information in the progressive format is divided into a field “A” top and a field “A” bot constituting the second video information in the interlace format. Converted. Note that “top” means an odd-numbered line in the Frame as described above, and “bot” means an even-numbered line in the Frame. Further, the frame “B” (Frame B) constituting the first video information in the progressive format is converted into the field “B” top and the field “B” bot constituting the second video information in the interlace format.

  In substantially the same manner, the frame “C” (Frame C) constituting the first video information in the progressive format is converted into the field “C” top and the field “C” bot constituting the second video information in the interlace format. Is done. Further, the frame “D” (Frame D) constituting the first video information in the progressive format is converted into the field “D” top and the field “D” bot constituting the second video information in the interlace format.

  Next, it is determined whether or not an abnormal part is detected (step S102). Here, when it is not determined that an abnormal part is detected (step S102: No), the second conversion process is performed (step S103). Specifically, as shown in the lower part from the center portion in FIG. 8, for example, the fields constituting the second video information compliant with the interlace format constitute the third video information compliant with the progressive format, for example. Converted to a frame. That is, the four fields constituting the interlaced second video information are converted into four frames constituting the progressive third video information. More specifically, the field “A” top and the field “A” bot constituting the second video information of the interlace format are converted into the frame “A” constituting the third video information of the progressive format, respectively. . Note that “top” means an odd-numbered position on the time axis as described above, and “bot” means an even-numbered position on the time axis. Further, the field “B” top and the field “B” bot constituting the second video information of the interlace format are converted into the frame “B” constituting the third video information of the progressive format, respectively.

  In substantially the same manner, the field “C” top and the field “C” bot constituting the interlaced second video information are converted into the frame “C” constituting the progressive third video information, respectively. Further, the field “D” top and the field “D” bot constituting the second video information of the interlace format are converted into the frame “D” constituting the third video information of the progressive format, respectively.

(6-2) When an abnormal part exists
Next, with reference to FIG. 4 and FIG. 9 described above, a case where this abnormal portion exists in the first video information will be described. FIG. 9 shows frames constituting video information when the first and second conversion processes and the correction process are performed when there is an abnormal part according to the second embodiment of the video reproduction apparatus of the present invention. It is a schematic diagram which shows the correspondence with a field diagrammatically.

  As shown in FIG. 4 described above, the first conversion process described above is performed (step S101). Specifically, as shown in the upper part of FIG. 9, before the first conversion process is performed, the first video information of the progressive system is configured in the first video information in which the abnormal part exists. A frame “A” (Frame A) includes a field “A” top and a field “A” bot. Further, a frame “B” (Frame B) constituting the first video information of the progressive method is configured by a field “A” top and a field “B” bot. In particular, in this field “A” top, the part where field “A” top is inserted instead of field “B” top is an abnormal part.

  In substantially the same manner, a frame “C” (Frame C) constituting the first video information of the progressive method is composed of a field “B” top and a field “C” bot. In particular, in this field “B” top, a portion where field “B” top is inserted instead of field “C” top is an abnormal portion. Further, a frame “D” (Frame D) constituting the first video information of the progressive system is configured by a field “D” bot and a field “D” top.

  Then, this first conversion process is performed, and as shown in the center part from the upper part in FIG. 9, for example, a frame (Frame) constituting the first video information recorded in conformity with the progressive method, For example, it is converted into a field constituting the second video information conforming to the interlace method.

  Specifically, as shown from the upper part to the center part in FIG. 9, the frame “A” (Frame A) constituting the first video information of the progressive system constitutes the second video information of the interlace system. It is converted into the field “A” top and the field “A” bot. Further, the frame “B” (Frame B) constituting the first video information of the progressive format includes the field “A” top and the field “B” bot which are the abnormal portions constituting the second video information of the interlace format. Is converted to

  In substantially the same manner, the frame “C” (Frame C) constituting the first video information of the progressive method is the field “B” top and the field “C” which are abnormal portions constituting the second video information of the interlace method. converted to bot. Further, the frame “D” (Frame D) constituting the first video information in the progressive format is converted into the field “D” top and the field “D” bot constituting the second video information in the interlace format.

  Next, as described above, it is determined whether or not an abnormal part is detected (step S102). Here, when it is determined that an abnormal part is detected (step S102: Yes), a second conversion process and a correction process (a so-called moving image correction process) are performed (step S104). Specifically, as shown in the lower part from the center portion in FIG. 9, for example, the fields constituting the second video information compliant with the interlace method constitute the third video information compliant with the progressive method, for example. The frame is converted while being corrected. That is, the four fields constituting the interlaced second video information are converted into four frames constituting the progressive first video information while being corrected.

  More specifically, the field “A” top and the field “A” bot constituting the second video information of the interlace format are converted into the frame “A” constituting the third video information of the progressive format, respectively. . Further, the correction process is performed on the fields “A” top and “B” bot that are the abnormal portions constituting the second video information of the interlace scheme, and the frame “B1” constituting the third video information of the progressive scheme is performed. And frame “B2”.

  In substantially the same manner, the frames constituting the progressive third video information are processed while the correction processing is performed on the fields “B” top and “C” bot that are the abnormal parts constituting the second video information of the interlace method. “C1” and “C2” are respectively converted.

  Further, the field “D” top and the field “D” bot constituting the second video information of the interlace format are converted into the frame “D” constituting the third video information of the progressive format, respectively.

  As described above, according to the second embodiment, in addition to the 2-3 sequence, the abnormal portion and the normal portion are appropriately displayed in the third video information in accordance with various aspects of the second format such as the 2-2 sequence. It is possible to convert while correcting.

  In the above-described embodiment, MPEG2 or H.264 is used as an example of the video information playback apparatus and the video information playback system. The video information playback apparatus and video information playback system for playing back video signals compliant with H.264 / AVC and the like have been described. However, the present invention provides a video information playback apparatus for playing back video signals compliant with other types of standards, and The present invention can also be applied to a video information reproduction system.

  The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification. In addition, a video information playback system, a video information playback system control method, and a computer program are also included in the technical scope of the present invention.

It is the schematic diagram which showed typically the outline | summary of the encoding and decoding in the video signal holding the video information which concerns on a present Example. It is the schematic diagram which showed typically the comparison with the frame period in the movie film used as the reference | standard in determining the period of the video signal holding the video information of this invention, and the frame period in the video of an NTSC system, for example. 1 is a block diagram conceptually showing the basic structure of a video recording / reproducing apparatus in a first example of a video reproducing apparatus of the present invention. FIG. It is the flowchart which showed the flow of the 1st conversion process by the video recording / reproducing apparatus based on 1st Example of the video reproduction apparatus of this invention, a 2nd conversion process, and a correction process. FIG. 4 is a schematic diagram schematically showing the correspondence between frames and fields constituting video information when the first and second conversion processes are performed when there is no abnormal portion according to the first embodiment of the video reproduction apparatus of the present invention. FIG. FIG. 6 is a diagram showing the correspondence between frames and fields constituting video information when the first and second conversion processes and the correction process are performed when an abnormal portion exists according to the first embodiment of the video reproduction apparatus of the present invention; FIG. A schematic diagram (FIG. 7A) schematically showing a video in which the third video information of the progressive method is reproduced when the correction processing according to the present embodiment is performed, and the progressive method according to the comparative example It is a schematic diagram (Drawing 7 (b)) which shows typically the picture by which the 3rd picture information was reproduced. FIG. 6 is a schematic diagram schematically showing the correspondence between frames and fields constituting video information when the first and second conversion processes are performed when there is no abnormal portion according to the second embodiment of the video reproduction apparatus of the present invention. FIG. According to the second embodiment of the video reproduction apparatus of the present invention, when an abnormal part exists, the correspondence between the frame and the field constituting the video information when the first and second conversion processing and the correction processing are performed is schematically shown. FIG.

Explanation of symbols

100 video information recording / reproducing apparatus 101 first converting means 102 second converting means 103 detecting means 104 correcting means 105 reproducing means

Claims (11)

A video information reproducing apparatus for reproducing first video information recorded in a first format in units of frames on an information recording medium,
First conversion means for converting the first video information into second video information in a second format in units of fields included in the frame;
Correction means for correcting an abnormal portion where the combination of the fields constituting the second video information is abnormal;
A second conversion means for converting the corrected abnormal portion and a normal portion in which the combination of the fields included in the second video information is normal into the third video information of the first format;
A video information playback apparatus comprising: playback means for playing back the third video information. It further comprises detection means for detecting the abnormal part,
The video information reproducing apparatus according to claim 1, wherein the correction unit corrects the detected abnormal portion.   In addition to or instead of (i) correcting the abnormal portion based on the logical continuity of the field, (ii) the signal characteristics of the still image on which the field has been processed The video information reproducing apparatus according to claim 1, wherein the abnormal portion is corrected based on the video information. Further comprising a specifying means for specifying a temporal or spatial position where the possibility of occurrence of the abnormal portion is relatively high;
4. The video information reproducing apparatus according to claim 1, wherein the correcting unit corrects the abnormal portion based on the specified position. 5.   When the second format is a format in which the two frames are constituted by the five fields, the second conversion means converts the five fields into the two frames or the five frames. 5. The video information reproducing apparatus according to claim 1, wherein the abnormal portion and the normal portion are converted into the third video information by converting into the third video information.   When the second format is a format in which the two frames are constituted by the four fields, the second conversion means converts the four fields into the two frames or the four frames. 5. The video information reproducing apparatus according to claim 1, wherein the abnormal portion and the normal portion are converted into the third video information by converting into the third video information. A video information reproduction system for reproducing and displaying first video information recorded in a first format in units of frames on an information recording medium,
First conversion means for converting the first video information into second video information in a second format in units of fields included in the frame;
Correction means for correcting an abnormal portion where the combination of the fields constituting the second video information is abnormal;
A second conversion means for converting the corrected abnormal portion and a normal portion in which the combination of the fields included in the second video information is normal into the third video information of the first format;
Playback means for playing back the third video information;
A video information reproduction system comprising: display means for displaying the reproduced third video information. A video information playback method in a video information playback apparatus for playing back first video information recorded in a first format in units of frames on an information recording medium,
A first conversion step of converting the first video information into second video information in a second format in units of fields included in the frame;
A correction step of correcting an abnormal part in which the combination of the fields constituting the second video information is abnormal;
A second conversion step of converting the corrected abnormal part and a normal part in which the combination of the fields included in the second video information is normal into the third video information of the first format;
A video information reproduction method comprising: a reproduction step of reproducing the third video information. A control method in a video information playback system for playing back and displaying first video information recorded in a first format in units of frames on an information recording medium,
A first conversion step of converting the first video information into second video information in a second format in units of fields included in the frame;
A correction step of correcting an abnormal part in which the combination of the fields constituting the second video information is abnormal;
A second conversion step of converting the corrected abnormal part and a normal part in which the combination of the fields included in the second video information is normal into the third video information of the first format;
A reproduction step of reproducing the third video information;
And a display step of displaying the reproduced third video information. A control method of the video information playback system, comprising:   A control computer program for controlling a computer provided in the video information reproducing apparatus according to claim 1, wherein the computer includes the first conversion unit, the correction unit, the second conversion unit, and the computer program. A computer program which functions as at least a part of reproducing means.   A control computer program for controlling a computer provided in the video information reproducing system according to claim 7, wherein the computer includes the first converting means, the correcting means, the second converting means, and the reproducing means. And a computer program which functions as at least a part of the display means.

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