JP3069870U - Digital video editing device and digital video playback device edited thereby - Google Patents

Abstract

(57) [Summary] [Problem] To enable display restriction only for a motion component of compressed video data conforming to the MPEG standard. When an object represented by an arrow hits and hits the head of a person represented by a circle, the video scene corresponds to a violence scene recognized as having an educational problem. Therefore, the editing device extracts the arrows and circles from the violence scene as motion components, and adds display control information having a control level corresponding to the content to the extracted motion components. When a violence scene including this motion component is reproduced, a display process based on the display control information is performed on the motion component to which the display control information is added, and the motion component to which the display control information is added is mosaic-processed. Is displayed.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 This invention is designed to restrict the display when authoring compressed video data conforming to MPEG, which is the international standard for video compression and decompression, when the video scene is considered inappropriate for education. The present invention relates to a digital video editing device for adding information and a digital video reproducing device for reproducing a digital video edited by this device.

[0002]

[Prior art]

 Broadcast information that can be displayed by a television (hereinafter abbreviated as TV) and reproduction information of a recording medium such as a video and a laser disk contain scenes that are considered inappropriate for children's education (for example, excessive Violence scenes, sexual scenes, etc.), and in the United States, these inappropriate video scenes (hereinafter, referred to as violence scenes) are automatically watched only during the broadcast period. A bill was enacted that mandates that the enabling functions be incorporated into TV receivers larger than 13 inches.

[0003] As a function of making the violence scene unviewable, for example, as described in Japanese Patent Application Laid-Open No. 10-108149, when TV broadcast information includes regulation information due to display regulation, The violence scene is not displayed on the screen by detecting the regulation information and changing the entire display screen of the TV receiver to a predetermined color such as red or green, or performing blackout processing on the entire screen. It is thought to be.

On the other hand, in recent years, with the rapid rise of multimedia, image compression technology has come to the forefront to simultaneously process video and audio signals, and in particular, MPEG (Moving) has become an international standard for compression and decompression of color moving images. The Picture Experts Group has rapidly spread its applications to computers, communications, broadcasting, entertainment and more.

[0005] Meanwhile, MPEG2 (MPEG Phase2) is used not only for storage media such as DVDs but also for digital broadcasting and communications, so that it is possible for ordinary users to easily view MPEG2 compressed video data playback video. It is getting.

[0006] For example, since the above-described biolens scene may be included in MPEG2 compressed video data stored in a DVD, for example, some display control is performed on such MPEG2 compressed video data. There is a need.

[0007]

[Problems to be solved by the invention]

 However, if the entire display screen is changed to one color as described above, the scene during the change is completely unknown, and during the course of a series of stories like a movie, When such a violence scene changed to a single color appears, there is a problem that the story is interrupted, giving a sense of incongruity to the user who is watching.

[0008] Therefore, an object of the present invention is to make it possible to restrict display only for a motion component of compressed video data conforming to the MPEG standard.

[0009]

[Means for Solving the Problems]

 In order to solve the above-described problems, the digital video editing apparatus according to the present invention uses a video scene when authoring compressed video data compliant with MPEG, which is an international standard for video compression and decompression. In a digital video editing apparatus for adding restriction information to restrict display when it is considered inappropriate for education, an extraction unit for extracting a motion component from a series of compressed video data; In addition, the present invention is characterized in that it further comprises an adding unit for adding display restriction information as the restriction information for restricting the display of the motion component in addition to at least the motion vector.

According to such a configuration, display restriction information is added to the motion component extracted by the extraction unit as restriction information for restricting the display of the motion component. No display regulation information is added. In addition, usually, in a violence scene, most of the educational problems are not the background but the moving parts (for example, weapons and persons holding them).

As a result, when the compressed video data is reproduced, the display control is applied only to the motion component to which the display control information is added, the display control is not applied to the background component having no motion, and the viewer is required to perform a series of operations. It is possible to enjoy the playback video of the compressed video data without interrupting the story.

Further, in the digital video editing apparatus according to the present invention, the display restriction information is set in a plurality of levels from a less restrictive level to a more restrictive level according to the content of the video scene. The unit adds the display control information of the level selected according to the content to the target motion component.

According to such a configuration, if the degree of restriction can be relaxed, judging from the contents of the video scene, display restriction information of a low level is added, and the degree of restriction needs to be strict. In some cases, strict display restriction information is added. Therefore, when compressed video data is played back, display restrictions are imposed according to the content of the video scene, and children can enjoy the playback video of the compressed video data with peace of mind.

In the digital video editing apparatus according to the present invention, the extraction unit may include an inter-frame coded picture, which is video information for performing forward predictive coding in MPEG, and a bidirectional predictive coding. It is characterized in that a moving component is extracted from a frame interpolation coded picture, which is video information to be coded.

According to such a configuration, the motion component is easily extracted from the MPEG inter-frame coded picture and the frame interpolated coded picture, and the display control information is added thereto, so that the intra-frame coded picture can be obtained. The display restriction processing can be performed by estimating from the display restriction information of the inter-frame coded picture or the frame interpolated coded picture before and after that, and the seamless display restriction can be realized.

Further, the digital video playback device according to the present invention includes an extraction unit for extracting the display control information added to the compressed video data, and a display control unit based on the display restriction information extracted by the extraction unit. A processing unit that performs a predetermined display restriction process such as mosaic or blurring on a motion component of the compressed video data to which display restriction information is added.

According to such a configuration, when the compressed video data is reproduced, display control information added only to the motion component is extracted, and a mosaic or a blur or the like is added to the motion component based on the display control information. Since the display control processing is performed in advance, the display control is applied only to the motion component and the display control is not applied to the background component that does not move, and the viewer can view the compressed video data without interrupting a series of stories. You can enjoy the playback video.

[0018] The digital video playback device according to the present invention further includes an extraction unit for extracting the display restriction information added to the compressed video data, and the display restriction information extracted by the extraction unit. And a processing unit for performing a display regulation process such as a mosaic or a blur whose degree of processing is different depending on the level of the display regulation information for the motion component of the compressed video data.

According to such a configuration, when the compressed video data is reproduced, the display restriction processing according to the content of the video scene is performed. It becomes possible to enjoy.

Further, the digital video playback device according to the present invention includes: an extracting unit that extracts the display regulation information added to the inter-frame coded picture and the motion component of the interpolated coded picture; Performing display restriction processing according to the display restriction information on the inter-frame coded picture and the motion component of the frame interpolation coded picture to which the display restriction information extracted by the extraction unit is added; For an intra-frame coded picture, which is video information to be subjected to intra-frame encoding, a process of performing display restriction processing by estimating from the display restriction information of the inter-frame coded picture or the interpolated coded picture before and after it. And a part.

According to such a configuration, the extracting unit extracts the display restriction information added to the inter-frame coded picture of MPEG and the motion component of the interpolated coded picture, and the processing unit The display control processing based on the extracted display control information is performed on the inter-frame coded picture and the frame interpolated coded picture, and for the intra-frame coded picture, the inter-frame coded picture or frame before and after the inter-frame coded picture Since the display restriction processing is performed by estimating from the display restriction information of the interpolated coded picture, it is possible to realize continuous display restriction without interruption.

Further, the digital video playback device according to the present invention includes an operation section for selecting and operating a regulation level by a display regulation process such as a mosaic or a blur, and the processing section is configured so that the processing section extracted by the extraction section It has a comparison function of comparing the level of display regulation information with the level selected by the operation unit. When the level of the display regulation information is more strict, the display according to the level of the display regulation information is provided. It is characterized by performing regulatory processing.

According to such a configuration, by selecting the strictest regulation level or less by operating the operation unit, most of the display regulation information extracted by the extraction unit becomes looser than the selected regulation level, The video scene is displayed with almost no display control processing. Conversely, by selecting the least restrictive control level, most of the display control information extracted by the extraction unit becomes stricter than the selected control level, and display control processing according to the level of the display control information is performed. Done.

Therefore, by selecting a restriction level according to the viewer's preference, when there is no need for display restriction, for example, when there is no need to restrict display, such as when children are not watching together, display restriction processing is performed. While it is possible to enjoy video scenes without images, if display restrictions are required, children can enjoy the playback video of compressed video data with peace of mind even when children are together by performing display restriction processing according to the level of the display restriction information. Can be.

[0025]

[Embodiment of the invention]

 An embodiment in which the present invention is applied to an editing apparatus for authoring a DVD and a DVD reproducing apparatus for reproducing a DVD edited by the editing apparatus (hereinafter, referred to as a DVD player) are shown in FIGS. This will be described with reference to FIG. However, FIG. 1 is a block diagram of the editing apparatus, FIGS. 2 to 4 are operation explanatory diagrams, and FIG. 5 is a block diagram of a DVD player.

Prior to a specific description of the present embodiment, an MPEG data structure will be briefly described with reference to FIGS. 3 and 4.

The data array structure (bit stream) of MPEG has a hierarchical structure as shown in FIG. 3, and a sequence layer representing the entire one video program is composed of several video information blocks of a predetermined number of frames. The GOP layer is composed of several pictures (screens), the picture layer is composed of slices obtained by dividing one picture into several blocks, and the number of slice layers is several. The MB layer is composed of a block of 8 pixels × 8 pixels (or scanning lines).

One block of 8 × 8 pixels is the minimum unit for encoding in MPEG, that is, DCT (Discrete Cosine Transform, discrete cosine transform). Meanwhile, MB consists total of six blocks of four blocks and the chrominance signal C _B of the luminance signal Y, and 2 blocks of C _R, the MB is the minimum unit of motion compensation prediction, motion A motion vector for compensated prediction is performed in MB units.

Further, a GOP includes an intra-coded picture (hereinafter referred to as an I-picture), which is video information to be subjected to intra-frame encoding, and a video to be subjected to forward predictive encoding. Predictive-coded picture (hereinafter referred to as P-picture), which is information, and Bidirectionally Predictive-coded picture, which is video information to be subjected to bidirectional predictive coding. Picture (hereinafter referred to as B picture), and as shown in FIG. 4, one GOP is composed of a predetermined number of frames of I, P, and B pictures.

At this time, a motion component is not included in the I picture, and a motion component is included only in the P and B pictures. On the other hand, the portion corresponding to the motion component in the I picture can be easily derived from the preceding and succeeding P and B pictures.

Based on such an MPEG bit stream, when authoring MPEG compressed video data, if display restriction information is added only to a motion component as restriction information for restricting display of a violence scene, The motion components included in the P-picture and the B-picture may be extracted, and display control information having a control level corresponding to the content may be added to the extracted motion components in addition to a motion vector, position information indicating the position, and the like. . For a screen such as an I-picture that has no distinction between a moving part and a background part, the display restriction processing is performed by estimating from the display restriction information added to the immediately preceding and succeeding P-pictures or B-pictures. Therefore, there is no need to add display control information to the I-picture.

Next, the configuration of an editing device for adding such display restriction information will be described. As shown in FIG. 1, video data from a video source 1 is compressed by an MPEG encoding unit 2 and is then processed by a keyboard or the like. The title and menu are configured by the editor unit 4 composed of a computer by the key operation of the operation unit 3, and information such as a navigation command as a framework for controlling the reproduction is input, and the system is multiplexed and formatted. Necessary information is generated.

Further, the motion components included in all P pictures and B pictures constituting the violence scene are extracted from the compressed video data compressed by the encoding unit 2 by the editor unit 4, and the extracted motion components are extracted. On the other hand, in addition to a motion vector, position information indicating the position of the motion component (for example, a coordinate position on the screen), display control information of a control level corresponding to the content is added. Here, the process of extracting the motion component by the editor unit 4 corresponds to the extracting unit, and the process of adding the display restriction information corresponds to the adding unit.

At this time, the display control information to be added is set in a plurality of levels from a level of a low control level to a strict level according to the content of the violence scene. The restriction level will be set so as to become stricter each time the target age is reduced due to educational considerations, such as "viewing ban below" and "viewing ban under 12".

In FIG. 1, reference numeral 5 denotes an MPEG decoding unit, and reference numeral 6 denotes a monitor comprising a TV receiver. The compressed video data is decoded by the decoding unit 5 and the decoded video is displayed on the screen of the monitor 6. The operator operates the operation unit 3 while looking at the display screen of the monitor 6 to specify a region corresponding to the motion component to be extracted. In addition, the display regulation information described above is added. At this time, in a region derived from the motion component extracted in this way, for example, in a bloody scene, a bleeding part reaching a background portion is also determined to be a motion component. Labeling can be restricted.

Now, for example, if the video scene shown in FIG. 2A has the content that an object represented by an arrow has hit and hit the head of a person represented by a circle, When the scene corresponds to a violence scene recognized as having a problem in education, as shown in FIG. 2B, the editor unit 4 causes the arrow and circle portions from the violence scene to be motion components (including the above-mentioned derived portions). Is extracted. Here, the arrows and circles and their surroundings may be extracted as motion components.

The editor unit 4 adds, to the extracted motion component, a motion vector, position information of the motion component on the entire screen, and display restriction information of a restriction level corresponding to the content. When a violence scene including a motion component is reproduced by a reproducing device, a display process based on the display restriction information is performed on the motion component to which the display restriction information is added, and the motion component to which the display restriction information is added is, for example, The image is displayed after being subjected to the mosaic processing as shown in FIG.

As described above, when the motion components included in all the P pictures and B pictures constituting the violence scene are extracted and the display control information of the control level corresponding to the content is added, it is usually necessary for educational purposes in the violence scene. In most cases, the problem is not the background but the moving part (for example, a weapon or a person holding it). Therefore, when compressed video data is played back, display regulation information is added. Display restriction is applied only to the moved motion component, and display restriction is not applied to the background component without motion. Here, for a screen in which there is no distinction between a moving part such as an I picture and a background part, the display regulation is estimated from display regulation information added to the immediately preceding and succeeding P picture or B picture. Since the processing can be performed, the display is continuously and continuously controlled.

Next, the configuration of a DVD player that plays back a DVD storing MPEG video data to which display control information has been added by the above-described editing device will be described with reference to FIG.

In FIG. 5, reference numeral 11 denotes a DVD as a recording medium which is rotated and driven by a drive system (not shown); 12, a read unit comprising an optical pickup; 13, a compressed video / audio data read from the compressed video / audio data read by the read unit 12; A demultiplexing unit 14 for separating the data packet and the compressed audio data packet is a decompression unit. The decompressing unit 14 decodes the compressed video data packet and the compressed audio data packet separated by the demultiplexing unit 13, respectively, and decodes the original video and audio signal. To elongate. Here, the reading unit 12, the separation unit 13, and the decompression unit 14 are configured by a general decoder IC.

Further, in FIG. 5, a video output unit 15 converts the video data expanded by the expansion unit 14 into a color television signal of the NTSC or PAL system so as to be displayed on a monitor screen M of a television or the like, and outputs it. , 16 is an audio output unit for outputting the audio data expanded by the expansion unit 14 from the speaker S, 17 is a memory such as a RAM for temporarily storing the data expanded by the expansion unit 14, and 18 is a control unit to be described later. A ROM 19 storing a control program and the like is a control unit, which controls the operation of the drive system of the DVD 11, the read unit 12, the separation unit 13, and the decompression unit 14 in response to key operations of the remote controller 20. Reference numeral 21 denotes a RAM for temporarily storing data. The reading unit 12, the separation unit 13, the decompression unit 14, the video output unit 15, the audio output unit 16, the memory 17, the ROM 18, the control unit 19, and the RAM 21 A DVD player is configured.

The remote controller 20 is provided with a selection key 20 a as an operation unit so that the user can select a restriction level of display restriction information for restricting display by actually performing display processing of a mosaic or the like. The data of the regulation level corresponding to the operation of the selection key 20a is stored in a register (not shown) built in the control unit 19. For example, each time the selection key 20a is turned on once, the data indicating the restriction level is sequentially switched in a direction of becoming stricter, and the confirmation key provided separately from the selection key 20a is turned on or the selection key 20a is turned on for a predetermined time or more. By performing a determination operation such as continuing, the data of the selected regulation level is stored in the register of the control unit 19.

When the control unit 19 reads the display regulation information for the violence scene recorded on the DVD 11, the control unit 19 determines the regulation level based on the data stored in the register and the regulation level of the read display regulation information. Compare with

When the display regulation information is at a stricter regulation level, the control unit 19 may operate, for example, the ROM 18 (or a separately provided ROM 18) in order to perform a display regulation process in accordance with the level of the display regulation information. Based on the read display regulation information, a mosaic pattern matching the regulation level is read out from a plurality of types of mosaic patterns stored in advance in a memory (not shown), and the read mosaic pattern is displayed in the corresponding violence scene. It is superimposed on the motion component area to which the regulation information has been added. Note that, for a screen in which there is no distinction between a moving part such as an I picture and a background part, the control unit 19 uses the display regulation information added to the immediately preceding and succeeding P picture or B picture. The same display restriction processing is performed so that the P and B pictures before and after the estimation are continued. The control level comparison and display processing by the control unit 19 corresponds to a processing unit.

Here, the mosaic pattern that matches the restriction level of the display restriction information corresponds to, for example, a fine mosaic pattern in which the mosaic-processed portion is hardly legible when the restriction level is severe. When the pattern is loose, a rough mosaic pattern in which the mosaiced part is slightly unreadable is applicable.

Therefore, according to the above-described embodiment, the display control information is added only to the motion component by the editor 4 of the editing device, so that the display control can be applied only to the motion component. In contrast to the case where the entire screen is displayed in a predetermined color such as red or green or blackout processing, the viewer can enjoy the playback video of the compressed video data without interrupting the series of stories. Become.

In addition, by operating the selection key 20 a of the remote control 20 on the DVD player side, a restriction level according to the preference of the viewer is selected, so that the restriction level to be actually subjected to the display restriction processing is viewed. It can be changed according to the preference of the user.

For example, when there is no need to restrict the display because the child is not watching together, by setting the restriction level to the minimum or no restriction by operating the selection key 20a, the display restriction processing is reduced, or You can enjoy video scenes without any restrictions.

On the other hand, if the child is watching the display together and it is necessary to restrict the display, the display level added to the DVD data is set by operating the selection key 20 a to set the restriction level to a desired level. The display regulation processing according to the regulation level of the regulation information enables the child to enjoy the playback video of the compressed video data with ease, even with the child.

In the above-described embodiment, the case where the regulation level of the display regulation information is set to a plurality of levels is described. However, it is not particularly necessary to set the regulation level to a plurality of levels, and when the display regulation information is added, Of course, a predetermined (one type) mosaic process or a blur process may be uniformly performed on a motion component at the time of reproduction by a DVD player.

At this time, even when the display control process is always performed when the display control information is added, the degree of the mosaic process or the blur process can be appropriately selected and changed by the viewer. You may keep it.

In the above-described embodiment, the case where the mosaic pattern is superimposed and displayed as the display regulation process on the DVD player side is described. However, the process of blurring and displaying the target portion may be performed. Absent.

Further, in the above-described embodiment, the case where the present invention is applied to a DVD player which is a playback apparatus for digital video information has been described. However, the present invention is not particularly limited to a DVD player and conforms to other MPEG standards. Of course, the present invention can be applied to an apparatus for reproducing a recording medium storing compressed video data, and in each case, an effect equivalent to that of the above-described embodiment can be obtained.

The present invention is not limited to the above-described embodiment, and various changes other than those described above can be made without departing from the gist of the present invention.

[0055]

[Effect of the invention]

 As described above, according to the invention of claim 1, display restriction information is added as restriction information for restricting the display only to the motion component extracted by the extraction unit. When video data is played back, display control is applied only to moving components to which display control information is added, and display control is not applied to background components that do not move, so that viewers can continue a series of stories without interruption. It is possible to enjoy a playback video of the compressed video data, and it is possible to provide an editing apparatus for digital video information having an excellent function of performing display processing for a violence scene.

According to the invention of claim 2, if the degree of restriction can be relaxed based on the contents of the video scene, display restriction information of a lower level is added, and the degree of restriction is added. If it is necessary to tighten the display control information, a strict level of display control information is added.When compressed video data is played back, display control is applied according to the content of the video scene, and even if children are together, the compressed video data You can enjoy the playback video with confidence.

According to the invention of claim 3, a motion component is extracted from an MPEG inter-frame coded picture and a frame interpolated coded picture and display control information is added thereto. With regard to, the display restriction processing can be performed by estimating from the display restriction information of the inter-frame coded picture or the frame interpolated coded picture before and after it, and it is possible to realize seamless display restriction.

According to the invention of claim 4, when the compressed video data is reproduced, the display control information added to only the moving component is extracted, and based on the display control information, the display control information is added to the motion component. As a result, a predetermined display restriction process such as mosaic or blur is performed, so that only the moving component is restricted, and the background component that does not move is not restricted, and the viewer stops a series of stories. Thus, it is possible to provide a high-performance digital video information reproducing apparatus capable of enjoying a reproduced video of compressed video data without performing display control processing for a violence scene.

According to the present invention, when the compressed video data is reproduced, the display process is performed according to the content of the video scene, so that the compressed video data can be reproduced even with children. It is possible to enjoy the video with peace of mind.

[0060] According to the invention of claim 6, the processing section performs display restriction processing on the inter-frame coded picture and the frame interpolated coded picture based on the extracted display restriction information. In addition, for intra-coded pictures, display control processing is performed by estimating from the display control information of the preceding and following inter-frame coded pictures or interpolated coded pictures. Regulations can be realized.

According to the present invention, by selecting an appropriate level below the control level by operating the operation unit, the control level to be actually subjected to display control processing is changed according to the viewer's preference. can do.

[Brief description of the drawings]

FIG. 1 is a partial block diagram of an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram of one embodiment of the present invention.

FIG. 3 is an operation explanatory diagram of one embodiment of the present invention.

FIG. 4 is an operation explanatory diagram of one embodiment of the present invention.

FIG. 5 is a block diagram of another part of an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 video source 2 MPEG encoding section 4 editor section 11 DVD (recording medium) 19 control section 20a selection key (operation section)

Claims (7)

[Utility model registration claims] 1. An international standard for video compression and decompression M
When authoring compressed video data conforming to PEG, if the video scene is deemed inappropriate for education, a digital video editing device that adds restriction information to restrict the display of the video scene. An extraction unit that extracts a motion component from among them; and an addition unit that adds display restriction information as the restriction information for restricting the display of the extracted motion component in addition to at least a motion vector. A digital video editing device, comprising: 2. The display restriction information is set in a plurality of steps from a level with a low degree of restriction to a strict level in accordance with the content of the video scene, and the adding unit sets the level of the level selected in accordance with the content. The digital video editing apparatus according to claim 1, wherein the display restriction information is added to a target motion component. 3. The image processing apparatus according to claim 1, wherein the extracting unit is configured to calculate an inter-frame coded picture which is video information for performing forward prediction encoding in MPEG and a frame interpolation coded picture which is video information for performing bidirectional prediction coding. 3. The digital video editing apparatus according to claim 1, wherein a motion component is extracted. 4. A digital video reproducing apparatus for reproducing a digital video edited by the digital video editing apparatus according to claim 1, wherein: an extracting unit for extracting the display regulation information added to the compressed video data. A processing unit that performs a predetermined display restriction process such as mosaic or blur on a motion component of the compressed video data to which the display restriction information is added based on the display restriction information extracted by the extraction unit. A digital video playback device characterized by: 5. A digital video playback device for playing back a digital video edited by the digital video editing device according to claim 2, wherein: an extraction unit for extracting the display regulation information added to the compressed video data. Processing for performing a display restriction process such as a mosaic or a blur having a different processing degree according to the level of the display restriction information on a motion component of the compressed video data to which the display restriction information extracted by the extraction unit is added. And a digital video reproducing device comprising: 6. A digital video reproducing apparatus for reproducing a digital video edited by the digital video editing apparatus according to claim 3, wherein a motion component of the inter-frame coded picture and the frame interpolated coded picture. An extraction unit that extracts the display restriction information added to the inter-frame coded picture and the motion component of the frame interpolation coded picture to which the display restriction information extracted by the extraction unit is added. The display restriction process is performed according to the display restriction information, and the display of the inter-frame coded picture or the interpolated coded picture before and after the intra-frame coded picture which is video information to be subjected to intra-frame coding is performed. A processing unit for performing display regulation processing by estimating from the regulation information. Tal video of the playback device. 7. An operation unit for selecting and operating a restriction level by a display restriction process such as mosaic or blur, wherein the processing unit is selected by the operation unit and a level of the display restriction information extracted by the extraction unit. 6. The display control apparatus according to claim 5, further comprising a comparison function of comparing the display restriction information with a predetermined level, and when the display restriction information is at a more restrictive level, performing a display restriction process according to the level of the display restriction information. 7. The digital video playback device according to item 6.