KR20110001380A - Recording medium, data recording/reproducing method, and data recording/reproducing apparatus - Google Patents

Abstract

PURPOSE: A recording medium, a data recording/reproducing method and a data recording/reproducing apparatus for reproducing a graphic stream in three dimensional image are provided to reduce the reproducing time of the graphic stream by supplying a decoder. CONSTITUTION: A recording medium, a data recording/reproducing method and a data recording/reproducing apparatus for reproducing a graphic stream in three dimensional image include a video stream, a graphic stream, and a data area. The video stream comprises video data. The graphic stream reproduces the video stream. The data area records 3-dimensional image for displaying the graphic stream in a signal processor(40).

Description

RECORDING MEDIUM, DATA RECORDING / REPRODUCING METHOD, AND DATA RECORDING / REPRODUCING APPARATUS}

The present invention relates to a recording medium, a data recording / reproducing method, and a data recording / reproducing apparatus. The present invention relates to a recording medium capable of recording / reproducing using such a method and apparatus.

Recent rapid development of technology has led to the emergence of high-capacity recording media. Such recording media include Blu-ray Disc, Near Field Recording Medium, and the like.

In the early days of recording media, the main function was to record / reproduce low-capacity two-dimensional images. However, with the emergence of high-capacity recording media, functions for recording / reproducing three-dimensional images requiring high capacity are required. Accordingly, recording media on which 3D image data is recorded and devices for recording / reproducing the same have been developed.

Accordingly, there is a need for an efficient method and apparatus for displaying a graphic stream such as a menu or subtitle reproduced together with a video stream that is three-dimensional image data as a three-dimensional image.

It is an object of the present invention to provide an efficient method and apparatus for displaying a graphic stream as a three-dimensional image when recording / reproducing data of a recording medium.

Accordingly, the present invention provides a video stream including image data; A graphics stream for playing with the video stream; And a data area in which stereoscopic display information for displaying the graphic stream as a 3D image is recorded, wherein the stereoscopic display information includes first stereoscopic display information for displaying the graphic stream as a 3D image in units of screen pages. It provides a recording medium comprising a.

The present invention also includes an embodiment in which the stereoscopic display information further includes second stereoscopic display information for displaying an object constituting the graphic stream as a 3D image in units of the screen page.

The present invention also includes an embodiment in which the stereoscopic display information includes an offset which is information for moving the graphic stream in a horizontal direction.

In addition, the present invention includes an embodiment in which the stereoscopic display information is included in the graphic stream.

In addition, the present invention includes an embodiment in which the graphic stream is a presentation graphic stream or an interactive graphic stream.

The present invention also provides a method of recording a video stream including image data and a graphics stream for reproduction with the video stream in a data area of a recording medium; And recording stereoscopic display information for displaying the graphic stream as a 3D image in the data area, wherein the stereoscopic display information is a first for displaying the graphic stream as a 3D image in units of screen pages. A data recording method including stereoscopic display information is provided.

The present invention also provides a method comprising: reading in a data area of a recording medium a video stream including image data and a graphics stream for reproduction with the video stream; Reading stereoscopic display information in the data area for displaying the graphic stream as a 3D image; And reproducing the graphic stream as a 3D image according to the stereoscopic display information, wherein the stereoscopic display information includes first stereoscopic display information for displaying the graphic stream as a 3D image in units of screen pages. A data reproduction method is provided.

The present invention also provides a pickup for recording data on a recording medium; And a video stream including image data and a graphic stream for reproduction with the video stream in a data area of the recording medium, and stereoscopic display information for displaying the graphic stream as a three-dimensional image in the data area. And a control unit for controlling the pickup so that the stereoscopic display information includes first stereoscopic display information for displaying the graphic stream as a three-dimensional image in units of screen pages.

The present invention also provides a pickup for reading data of a recording medium; A decoder for converting a graphic stream for reproduction with a video stream including image data into image data that can be output to a screen; And controlling the pickup so that the video stream and the graphic stream are read in the data area of the recording medium, and the stereoscopic display information for displaying the graphic stream as a three-dimensional image is read in the data area. And a controller for controlling the decoder to convert the graphic stream into a 3D image and to reproduce the 3D image. The stereoscopic display information includes first stereoscopic display information for displaying the graphic stream as a 3D image on a screen page basis. A data reproducing apparatus is provided.

The present invention also includes an embodiment in which the stereoscopic display information further includes second stereoscopic display information for displaying an object constituting the graphic stream as a 3D image in units of the screen page.

The present invention also includes an embodiment in which the stereoscopic display information includes an offset which is information for moving the graphic stream in a horizontal direction.

In addition, the present invention includes an embodiment in which the stereoscopic display information is included in the graphic stream.

In addition, the present invention includes an embodiment in which the graphic stream is a presentation graphic stream or an interactive graphic stream.

The present invention may further include a graphic decoder that converts the graphic stream into a graphic image that is a two-dimensional image and outputs the graphic stream, wherein the graphic decoder moves the graphic image in a horizontal direction using the stereoscopic display information. It includes an example to make.

The present invention also includes an embodiment in which the decoder further includes an offset decoder for calculating the stereoscopic display information of the graphic stream.

The offset decoder may further include a first offset decoder configured to calculate the stereoscopic display information, which is information for moving the graphic image to the left; And a second offset decoder for calculating the stereoscopic display information, which is information for moving the graphic image to the right.

The graphic decoder may further include: a first graphic decoder configured to output the graphic image input to the first offset decoder; And a second graphic decoder configured to output the graphic image input to the second offset decoder.

The present invention also includes an embodiment in which the decoder further includes a copy unit which copies the graphic image and outputs the copied graphic image to the first offset decoder or the second offset decoder.

According to the recording medium, the data recording / reproducing method, and the data recording / reproducing apparatus according to the present invention, a graphic stream recorded / reproduced on the recording medium can be reproduced as a three-dimensional three-dimensional image. In addition, it is possible to efficiently manage stereoscopic display information for displaying a graphic stream as a 3D image. In addition, by providing a decoder that efficiently decodes a graphics stream, it is possible to shorten the playback time of the graphics stream.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. In the following description, the same components are given the same names and the same reference numerals for the convenience of description.

The terminology used in the present invention was selected as a general term that is widely used at present, but in some cases, the term is arbitrarily selected by the applicant, and in this case, the meaning of the term is described in detail in the description of the present invention. The present invention should be understood as meanings other than terms.

In the present invention, the recording medium means any medium on which data is recorded or can be recorded. For example, a recording medium is meant to encompass all media regardless of a recording method such as a disk or a magnetic tape. Hereinafter, the present invention will be described by using a disc (Disc), particularly a Blu-ray Disc (BD), as a recording medium for convenience of description, but the technical spirit of the present invention is equally applicable to other recording media. It will be self explanatory.

The three-dimensional image of the three-dimensional image means that the three-dimensional image is displayed so as to be positioned at a constant distance from the output device (Displayer) toward the user. Large 3D image is displayed so that the 3D image is located closer to the user, and small 3D image is displayed so that the 3D image is located far from the user.

In the present invention, the general contents of the PCS (Presentation Composition Segment) and the ICS (Interactive Composition Segment) are disclosed in BD Thecnical White Paper published by US Publication No. US 2006/0222334 A1 and Blu-ray Disc Association (BDA). See also.

1 illustrates an integrated use between a recording medium, a data reproducing apparatus and a peripheral device according to an embodiment of the present invention. A recording medium and a data reproducing apparatus according to an embodiment of the present invention have a main function of providing a 3D image to a user.

As a method of providing a 3D image to a user, binocular disparity may be used to obtain a stereoscopic effect by viewing the same object in different directions with left and right eyes. According to this, a two-dimensional image having binocular disparity is separately outputted to the left eye and the right eye. Further, the 3D image is provided to the user in a manner of alternately exposing the left image to the left and right images through the special glasses such as polarization filter glasses.

Accordingly, the recording medium 10 according to the embodiment of the present invention is a recording medium on which three-dimensional image data is recorded, and the image data of the left time and the image data of the right time are recorded therein. In addition, graphic data such as menus and subtitles reproduced together with the image data are recorded.

Then, the data reproducing apparatus Player 11 according to the embodiment of the present invention reads and decodes the 3D image data recorded on the loaded recording medium 10. The video data at the left time and the video data at the right time are sequentially read and decoded into one three-dimensional stereoscopic image data. Also, the graphic data is decoded into a three-dimensional image. Decoded three-dimensional image data and graphic data are provided to an output device (Displayer) 12.

The output device 12 renders the 3D image data and the graphic data decoded by the data reproducing apparatus 11 and outputs the same to the user. In addition, the user wears special glasses 13, such as polarized filter glasses, to view a three-dimensional image. Here, the glasses (Stereoscopic) method that requires special glasses, but the present invention can be applied to the autostereoscopic method.

2 is a schematic structural diagram of a recording medium 10 according to an embodiment of the present invention.

2 shows a single layer recording medium 10 composed of one layer. However, the present invention is not limited thereto, and the present invention is applicable to all recording media having two or more layers. Since each layer may have the same structure, the present invention will be described based on a single layer.

The recording medium 10 of the present invention includes an inner zone 210, an outer zone 230, and a data zone 220.

The inner region 210 is located on the inner circumferential side of the recording medium 10, and the outer region 230 is located on the outer circumferential side of the recording medium 10. In addition, various types of information for controlling the recording medium 10 are stored in the inner region 210 and the outer region 230.

The data area 220 stores data that a user wants to record. The portion surrounded by the inner region 210 and the outer region 230 on the recording medium 10 becomes a region where data is actually recorded.

The data recorded in the data area 220 may be configured as, for example, multiplexed AV streams of a specific movie title. The AV stream includes a video stream, which is video data, and a graphic stream, which is a video played along with the video stream, such as a menu or a subtitle.

The video stream is two-dimensional image data or three-dimensional image data. The video stream, which is three-dimensional image data, may be composed of image data of the left view and image data of the right view. The data reproducing apparatus reads out the image data of the left time and the image data of the right time, decodes them into one 3D image, and reproduces them.

A graphic stream is an image reproduced together with a video stream, and includes a presentation graphic stream and an interactive graphic stream.

The presentation graphic stream is fixed image data. For example, a presentation graphic stream includes subtitles and pictures. The interactive graphic stream is image data in which a certain effect is generated according to a user's selection, for example, a menu.

The graphics stream is composed of two-dimensional image data or three-dimensional image data. Like the video stream, the graphic stream composed of the three-dimensional image data may be composed of the graphic stream of the left view and the graphic stream of the right view. In contrast, in the case of a graphic stream composed of two-dimensional image data, the data reproducing apparatus may generate image data of the left view and image data of the right view using stereoscopic display information for displaying the graphic stream as a three-dimensional image. .

Hereinafter, the display of a graphic stream composed of two-dimensional image data as a three-dimensional image using stereoscopic display information will be described.

3 is a conceptual diagram of decoding an AV stream into a 3D video according to an embodiment of the present invention.

In order to decode the AV stream into a three-dimensional image, the data reproducing apparatus decodes the video stream and the graphic stream into video / image data at the left time and video / image data at the right time, respectively. The data reproducing apparatus simultaneously outputs decoded video / image data of two time points, and displays the AV stream as a three-dimensional video.

Referring to the left eye, the data reproducing apparatus first generates a video plane on which image data of the left eye is displayed and a graphic plane on which image data of the left eye is displayed. In addition, the data reproducing apparatus overlays the graphic plane in front of the video plane. Accordingly, the 3D graphic image is displayed and output in front of the 3D video image. The data reproducing apparatus decodes the superimposed video plane and the graphics plane, that is, decodes the video image and the graphic image into a single image and outputs them to the user.

Then, the data reproducing apparatus generates a graphic plane of the left view by using the graphic stream composed of the two-dimensional image data and the stereoscopic display information for displaying the graphic stream as a three-dimensional image. In the present invention, stereoscopic display information for displaying a graphic stream as a 3D image is called an offset.

4 is a conceptual diagram of an offset 400 according to an embodiment of the present invention.

In order to display a graphic stream composed of two-dimensional image data as a three-dimensional image, image data of the left eye and image data of the right eye should be generated for the graphic stream.

As shown in the figure, the image data L Graphic of the left eye may be generated by moving the graphic stream to the left by a predetermined distance. The image data (R Graphic) at the right time may be generated by moving the graphic stream to the right by a predetermined distance. The data reproducing apparatus reads both image data (L Graphic) at the left time and image data (R Graphic) at the right time, and decodes and reproduces the image into one 3D image.

The value of the distance to be moved may be defined as an offset (Offset, 400), and the offset 400 is stereoscopic display information for displaying a graphic stream as a 3D image.

The size of the offset 400 represents the stereoscopic size of the graphics stream. The three-dimensional effect of the graphic stream is increased by the offset 400, that is, by moving the graphic stream in the horizontal direction. In other words, if the offset 400 is set large, the graphic stream is located close to the user, and if the offset 400 is set small, the graphic stream is located far from the user. Accordingly, the data reproducing apparatus or the user may adjust the stereoscopic degree of the graphic stream by using the offset 400.

In an embodiment of the present invention, the offset 400 is composed of a global offset 500 and a local offset 600. Hereinafter, the global offset 500 and the local offset 600 will be described in detail.

5 is a conceptual diagram of a global offset 500 according to an embodiment of the present invention.

The global offset 500 is information for displaying a three-dimensional effect of the graphic stream in units of screen pages.

The global offset 500 is a value that displays a graphic stream in a constant three-dimensional sense. That is, in order to display the graphic stream as a three-dimensional image, it is a distance value for moving the entire graphic stream in the horizontal direction. The data reproducing apparatus moves the entire graphic stream in the horizontal direction according to the global offset 500 to generate image data of the left view and image data of the right view. In this way, the three-dimensional effect of the graphic stream is displayed.

In the figure, the 3D menu is displayed in three-dimensional sense by the global offset 500 of the 3D menu, and the 3D subtitle is displayed in three-dimensional sense by the global offset 500 of the 3D subtitle.

The global offset 500 may be set for each screen page. The data reproducing apparatus may change the global offset 500 of the graphic stream for each screen page, thereby changing the 3D effect of the graphic stream for each screen page.

Accordingly, the data reproducing apparatus can use the global offset 500 to flexibly and more three-dimensionally display the graphic stream as a three-dimensional image. For example, when the stereoscopic sense of the video stream is larger than the stereoscopic sense of the graphics stream in one screen page, image display interference occurs between the video stream and the graphics stream. In other words, the video stream with a large three-dimensional effect prevents the graphic stream with the small three-dimensional effect from being displayed to the user. In this case, the data reproducing apparatus may adjust the global offset 500 of the graphic stream so that the graphic stream is displayed before the video stream on the screen page.

6 is a conceptual diagram of a local offset 600 according to an embodiment of the present invention.

The local offset 600 is information for displaying a 3D effect in units of screen pages of an object constituting the graphic stream.

Graphic streams consist of objects. For example, the presentation graphic stream displaying the caption is composed of objects of letters, and the interactive graphic stream displaying the menu is composed of objects of respective buttons of the menu. In the figure, the 3D menu, which is an interactive graphic stream, is composed of objects of an 'OK' button, a 'CANCEL' button and a 'NEXT' button.

The local offset 600 is a value indicating stereoscopic effect for each object of the graphic stream. The data reproducing apparatus displays a constant stereoscopic effect of the graphic stream using the global offset 500, and displays a stereoscopic effect of objects constituting the graphic stream using the local offset 600.

In the figure, the 3D menu is displayed with the overall three-dimensional effect by the global offset 500 of the 3D menu. In addition, the three-dimensional effect of each button is displayed differently by the local offset 600 of the 'OK' button, the 'CANCEL' button, and the 'NEXT' button constituting the 3D menu. The 'OK' button is displayed to have a three-dimensional effect larger than the global offset 500, and the 'NEXT' button is displayed to have a three-dimensional effect smaller than the global offset 500. The 'CANCEL' button is displayed to have a three-dimensional effect like the global offset 500.

In addition, the local offset 600 may be set for each screen page similarly to the global offset 500. The data reproducing apparatus may change the local offset 600 for each screen page to change the stereoscopic effect of the objects on the screen page.

Accordingly, the data reproducing apparatus may set a three-dimensional effect differently for each object of the graphic stream using the local offset 600, and may display the graphic stream to have a precise three-dimensional effect.

The method of configuring the global offset 500 and the local offset 600 according to an embodiment of the present invention is as follows.

First, the data reproducing apparatus calculates the global offset 500 and the local offset 600 for the corresponding graphics stream for each screen page. The data reproducing apparatus calculates the global offset 500 and the local offset 600 for the graphic stream so that the graphic stream does not cause video display interference between the video stream or other graphic streams. The data reproducing apparatus displays the graphic stream as a 3D image by using the global offset 500 and the local offset 600 calculated for each screen page. Thus, the data recording apparatus does not need to record the global offset 500 and the local offset 600 for the graphics stream on the recording medium.

Second, configure the graphics stream to include a global offset 500 and a local offset 600. The data reproducing apparatus displays the graphic stream as a 3D image by using the global offset 500 and the local offset 600 included in the graphic stream. Accordingly, the data reproducing apparatus does not calculate the global offset 500 and the local offset 600 for the graphic stream for each screen page, thereby reducing the time for decoding and outputting the graphic stream into a three-dimensional image.

The global offset 500 and the local offset 600 of the graphic stream may be included in a segment of the graphic stream. The segment is display control information of the graphic stream and may be recorded in the graphic stream. According to the information recorded in the segment, the size, color, etc. of the graphic stream are determined and output as an image. Hereinafter, the segments including the global offset 500 and the local offset 600 will be described in detail with reference to FIGS. 7 to 9.

7 is a structural diagram of a Presentation Composition Segment (PCS) according to an embodiment of the present invention.

PCS is the display control information of the presentation graphics stream. The global offset 500 and the local offset 600 of the presentation graphics stream can be recorded in the PCS. PCS includes a default offset field, a use_relocator_flag field, and a local offset field.

The global offset 500 of the presentation graphics stream is recorded in the default offset field.

In the use_relocator_flag field, whether to use offset decoders 920 and 930 to be described later is recorded. If the use_relocator_flag field is set to use offset decoders 920 and 930, the global offset 500 and local offset 600 of the graphics stream are calculated by the offset decoders 920 and 930, so that the offsets 500 and 600 recorded in the PCS are not used. Do not.

In the local offset field of the composition_object () field, the local offset 600 of the object of the presentation graphics stream designated by the composition_object () field is recorded.

8 is a structural diagram of an Interactive Composition Segment (ICS) according to an embodiment of the present invention.

ICS is display control information of an interactive graphics stream. The global offset 500 and the local offset 600 of the interactive graphics stream may be recorded in the ICS.

Like the PCS, the ICS includes a default offset field, a use_relocator_flag field, and a local offset field, and the field information can be configured in the same manner.

Unlike the PCS and ICS described above, a segment including only offset 500 and 600 information of a graphic stream may be defined. 9A and 9B, an Offset Definition Segment (ODS), which is a segment including only offset 500 and 600 information of a graphics stream, will be described. In the recording medium 10 in which the ODS is recorded, information about offsets 500 and 600 of the graphic stream may not be recorded in the PCS and the ICS.

9A is a structural diagram of an offset definition segment (ODS) according to a first embodiment of the present invention.

The ODS according to the first embodiment of the present invention includes a segment_descriptor () field, a number_of_offsests field, and an offset () field.

In the segment_descriptor () field, information about the ODS itself is recorded. The segment_descriptor () field includes a segment_type field and a segment_length field. Information indicating that the corresponding segment is an ODS is recorded in the segment_type field, and a byte size of the ODS is recorded in the segment_length field.

In the number_of_offsets field, information about the number of offsets 500 and 600 included in the ODS is recorded.

 In the offset () field, information about the global offset 500 of the graphic stream or the local offset 600 of the object of the graphic stream is recorded. The offset () field includes an offset_id field, an offset_direction field, and an offset_depth field.

In the offset_id field, identification information of the offset () field is recorded. The data reproducing apparatus uses the offset_id field value to identify a graphic stream or an object of the graphic stream using the offset (500,600) information of the corresponding offset () field.

In the offset_direction field, direction information for moving a graphic stream or an object of the graphic stream, that is, information indicating whether the stereoscopic effect is increased or decreased is recorded. For example, the offset_direction field has a Boolean value, and when it is set to a value of "0", it means that the three-dimensional effect is displayed as small as the offset_depth field value. When it is set to "1", it means that the three-dimensional effect is displayed as large as the offset_depth field value. .

In the offset_depth field, values of the offsets 500 and 600 of the graphic stream or the object of the graphic stream are recorded.

When offset (500,600) information is recorded in the ODS according to the first embodiment of the present invention, the PCS or ICS should identify the corresponding offset () field of the ODS in which the offset information of the graphic stream or the object of the graphic stream is recorded. . Accordingly, the PCS or ICS further includes an offset_id field in which identification information of the offset () field to be used by the graphic stream or the object of the graphic stream is recorded.

The ODS according to the first embodiment of the present invention may be configured differently from FIG. 9A described above. For example, the ODS may be configured to separately record the global offset 500 of the graphic stream and the local offset 600 of the objects constituting the graphic stream. In this case, the global offset 500 information is recorded in the global_offset () field (not shown), and the local offset 600 information is recorded in the local_offset () field (not shown).

As another example, the ODS may be configured to record offset 500 and 600 information by graphic stream. In this case, the ODS includes a stream () field (not shown), and the stream () field includes a stream_id field, a default_offset field, a composition () field, and a local_offset field in the composition () field. In the stream_id field, identification information of a graphic stream is recorded. As in the PCS or ICS described above, the global offset 500 and the local offset 600 are recorded in the default_offset field and the local_offset field.

The structure of the ODS according to the first embodiment of the present invention is not limited thereto, and may be modified in various ways within the range including all the offset (500, 600) information of the graphic stream.

9B is a structural diagram of an offset definition segment (ODS) according to a second embodiment of the present invention.

In the ODS according to the second embodiment of the present invention, offsets 500 and 600 are recorded as pixel information of a screen. That is, information about how many pixels the graphic stream or the object of the graphic stream is moved on the screen is recorded.

Pixel information of the offset 500, 600 is recorded in the depth () field, and the depth () field includes a depth_id field, a depth_version_number field, a depth_direction field, and a depth_entry () field.

In the depth_id field, identification information of the depth () field is recorded.

Version information that changes as information of the depth () field is updated is recorded in the depth_version_number field.

In the depth_direction field, direction information for moving a graphic stream or an object of the graphic stream, that is, information indicating whether the stereoscopic effect is increased or decreased is recorded.

Pixel information is recorded in the depth_entry () field and includes a pixel_count field, a pixel_size_info field, a screen_size_info, and a depth_info field.

The number of pixels is recorded in the pixel_count field. Therefore, the graphic stream or the object of the graphic stream using the depth () field is moved by the pixel_count field value in the direction of the depth_direction field value.

In the pixel_size_info field, size information of a pixel used in the depth () field is recorded.

Screen size information is recorded in the screen_size_info field.

In the depth_info field, distance information of a three-dimensional effect is recorded. That is, information on how far ahead the graphic stream or the object of the graphic stream is displayed on the screen is recorded.

According to the size of the screen, the number of pixels to which the graphic stream or the object of the graphic stream should be moved may be changed to give the same three-dimensional effect. Accordingly, the data recording / reproducing apparatus may correct the number of pixels to be moved, that is, offsets 500 and 600, using the screen_size_info field value and the depth_info field value.

When the pixel information of the offset (500, 600) is recorded in the ODS according to the second embodiment of the present invention, the PCS or the ICS records depth_id in which identification information of the depth () field to be used by the graphic stream or the object of the graphic stream is recorded. It further includes a field.

10 is a block diagram of a data recording / reproducing apparatus according to an embodiment of the present invention.

Looking specifically at the overall configuration of the data recording / reproducing apparatus of the present invention, the recording / reproducing section 70 first records or reads data on the recording medium (10). The recording / reproducing section 70 may be configured as a pickup 70 in one embodiment of the present invention. The pickup 70 includes a laser diode therein to record data on the surface of the recording medium 10 or to read a signal reflected from the recording medium 10.

 The servo 90 controls the tracking and focusing operation of the pickup 70 and the operation of the spindle motor 110.

 The R / F unit 80 generates a focus error signal and a tracking error signal, which are signals that detect out-of-focus and track-out of the laser beam by using the signal output from the pickup 70. .

The spindle motor 110 rotates a disc mounted in the data recording / reproducing apparatus.

The motor driver 100 drives the operation of the pickup 70 and the spindle motor 110 under the control of the servo 90.

The signal processor 40 restores the RF signal received from the R / F unit 80 to a desired reproduction signal value, or modulates and outputs a data signal to be recorded in a format recordable on the recording medium 10. .

The bit encoder 50 converts the write signal output from the signal processor 40 into a bit stream, and the pickup driver 60 transmits the bit stream generated by the bit encoder 50 to the recording medium 10. Convert to an optical signal to be stored.

The memory 150 temporarily stores information related to the recording medium 10 such as defect information of the recording medium 10 or performs a buffer function for temporarily storing data to be recorded or reproduced on the recording medium 10. do.

The microcomputer 120 is configured to control the signal processor 40, the servo 90, and the memory 150, and controls a drive including the components to perform a data recording or reproducing operation.

The 3D controller 130 generates a segment including a global offset 600 and a local offset 600, which are stereoscopic display information for displaying a graphic stream as a 3D image. The segment includes a Presentation Composition Segment (PCS) or an Interactive Composition Segment (ICS) or an Offset Definition Segment (ODS).

The global offset 500 is information for displaying a three-dimensional effect of the graphic stream in units of screen pages. The local offset 600 is information for displaying a three-dimensional effect of the object constituting the graphic stream in units of screen pages. The global offset 500 and the local offset 600 may be calculated by the microcomputer 120 or the 3D controller 130, or may be directly input by the host 140.

The 3D controller 130 transmits the generated segment to the signal processor 40 or the microcomputer 120 so that the segment is recorded on the recording medium 10 together with the graphic stream.

Although the 3D controller 130 is illustrated as one component, the present invention is not limited thereto. Several components may perform the function of the 3D controller 130 in conjunction with each other, and the 3D controller 130 may be implemented in an integrated form with the microcomputer 120 and / or the host 140. In addition, the 3D controller 130 may include a signal processor 40, a bit encoder 50, a pickup driver 60, a pickup 70, a servo 90, a motor driver 100, a spindle motor 110, and a microcomputer ( 120 may be additionally connected to a drive including the memory 150 to enable updating.

The host 140 is in charge of controlling all components of the data recording / reproducing apparatus, and interfaces with a user to control recording or reproducing of the recording medium 10. Specifically, the host 140 transmits a command to the microcomputer 120 to cause the data recording / reproducing apparatus of the present invention to perform a specific function, and the microcomputer 120 interoperates with each other in the data recording / reproducing apparatus according to the command. To control the components configured to.

In this regard, the microcomputer 120 and the host 140 may be provided and operated separately, and the functions of the microcomputer 120, the 3D controller 130, and the host 140 may be integrated into one control unit. It is also possible to work.

The host 140 may be a main controller of a computer, a server, an audio device, or a video device. That is, the recording / reproducing apparatus of the present invention may be an optical drive provided to a personal computer (PC) or the like, or may be a player not mounted on a personal computer or the like.

Accordingly, the data recording / reproducing apparatus according to the present invention can be applied to both an optical drive and a player utilized as a single product mounted and operated inside a PC.

In order to record data on the recording medium 10, the AV encoder 20 converts an input signal into a signal of a specific format recordable on the recording medium 10 and transmits the signal to the signal processor 40. For example, the AV encoder 20 may encode the input signal into an MPEG format signal. The signal processor 40 adds an error correction code (ECC) to the signal encoded by the AV encoder 20, converts the signal into a format recordable on the recording medium 10, and transmits the converted signal to the bit encoder 50.

The AV decoder 30 finally decodes the reproduction signal of the recording medium 10 received from the signal processing unit 40 and provides it to the user as output data such as a video, an audio signal, and a graphic signal. The graphic signal may be composed of a signal of a graphic stream which is two-dimensional image data.

The AV decoder 30 decodes the graphic stream, which is two-dimensional image data, into a three-dimensional image by using an offset 400 that is stereoscopic display information for displaying the graphic stream as a three-dimensional image. The AV decoder 30 generates the image data of the left time and the image data of the right time using the offset 400. The AV decoder 30 decodes the image data of the left time and the image data of the right time together and outputs them as a three-dimensional image.

The AV decoder 30 may calculate the offset 400 which is stereoscopic display information for displaying the graphic stream as a 3D image. The global offset 500 and the local offset 600 of the graphics stream are calculated so that the graphics stream does not experience video display interference between the video stream or other graphics streams.

The configuration of the AV decoder 30 varies depending on whether the offset 400 is calculated and the number of inputs of the graphic stream signal. The following describes an AV decoder 30 for decoding a graphic stream into a three-dimensional image.

11 is a block diagram of an AV decoder 301 according to the first embodiment of the present invention.

The AV decoder 301 according to the first embodiment of the present invention includes a transport buffer 810, a graphics decoder 800, a graphics plane 870, 880, and a color lookup table unit CLUT 890. It consists of. The AV decoder 301 may further include an object copy unit Clone Object 910.

The transport buffer 810 stores the graphic stream to be decoded in a predetermined size.

The graphics decoder 800 decodes the graphics stream to generate a graphics plane composed of image data of the graphics stream. The graphic decoder 800 may include a coded data buffer 820, a stream graphics processor 830, an object buffer 840, a composition buffer 850, and a graphic controller 850. Graphics Controller, 860).

The code data buffer 820 transfers the graphic stream transferred from the transport buffer 810 to the stream graphic processor 830 in accordance with the reproduction time of the graphic stream so that decoding can be started.

The stream graphic processor 830 transfers image data of an object to be output on the screen from the graphic stream to the object buffer 840, and transfers segment, which is information for controlling the image of the object, to the composition buffer 850.

The graphic controller 860 controls the graphic plane units 870 and 880 to generate a graphic plane which is image data of the graphic stream from the object image data stored in the object buffer 840 according to the information of the segment stored in the composition buffer 850. .

The graphic controller 860 generates the graphic plane of the left view and the graphic plane of the right view, which are three-dimensional image data, according to the offset 400 recorded in the PCS or the ICS or the ODS. That is, the image of the object is moved horizontally by the offset 400 to generate image data of the left eye and image data of the right eye.

The graphics planes 870 and 880 generate a graphics plane that is image data of a graphics stream under the control of the graphics controller 860. The graphic plane units 870 and 880 are composed of a left graphic plane unit 870 and a right graphic plane unit 880. The left graphic plane unit 870 generates a left graphic plane which is image data of a left view, and a right graphic plane. The unit 880 generates a right graphic plane that is image data of the right eye.

The color lookup table unit 880 controls the color and transparency of the generated graphic plane under the control of the graphic controller 860.

The object copying unit 910 copies image data of an object to be output on the screen, and transmits the image data to the graphic plane units 870 and 880. The AV decoder 301 may not include the object copy unit 910 according to an implementation method. In this case, the graphics decoder 800 decodes the graphics stream twice, and delivers the image data of the object to be output on the screen to each graphics plane unit 870 and 880.

According to the AV decoder 301 according to the first embodiment of the present invention, the offset 400 of the graphic stream is previously stored in the segment. Therefore, no operation, such as the AV decoder 30 separately calculating the offset, is required and the load on the AV decoder 30 is reduced.

12 is a block diagram of an AV decoder 302 according to the second embodiment of the present invention.

The AV decoder 302 according to the second embodiment of the present invention further includes an offset decoder (Offset Relocators 920 and 930) in the AV decoder 301 according to the first embodiment of the present invention.

Offset decoders 920 and 930 calculate a global offset 500 and a local offset 600 of the graphics stream. The offset decoders 920 and 930 calculate the global offset 500 and the local offset 600 of the graphics stream so that the graphics stream does not experience video display interference between the video stream or other graphics streams.

The offset decoders 920 and 930 include a left offset decoder 920 and a right offset decoder 930. The left offset decoder 920 calculates a global offset 500 and a local offset 600 for the image data of the left eye. The right offset decoder 930 calculates a global offset 500 and a local offset 600 for the graphic data of the image time.

Accordingly, the graphic controller 860 generates a graphic plane of left and right time using the global offset 500 and the local offset 600 calculated by the offset decoders 920 and 930 rather than the segments recorded in the graphic stream. do.

In the drawing, the AV decoder 302 is composed of the offset decoders 920 and 930 as the left offset decoder 920 and the right offset decoder 930, but the AV decoder 302 may be configured to include one offset decoder. In this case, the graphic control unit 860 shifts the graphic stream symmetrically by the offset calculated by one offset decoder to generate a graphic plane of both views.

According to the AV decoder 302 according to the second embodiment of the present invention, since the global offset 500 and the local offset 600 need not be recorded in the segment of the graphic stream, the size of the graphic stream can be reduced.

13 is a block diagram of an AV decoder 303 according to the third embodiment of the present invention.

The AV decoder 303 according to the third embodiment of the present invention, unlike the AV decoder 302 according to the second embodiment of the present invention, includes two graphic decoders 801 and 802. The object copy unit 910 is not included.

When two graphics decoders 801 and 802 are referred to as the first graphics decoder 801 and the second graphics decoder 802, the first graphics decoder 801 decodes the graphics stream to generate a graphics plane of the left view. The second graphics decoder 802 decodes the graphics stream to generate a graphics plane of the right view.

Accordingly, the transport buffer 810 stores the same graphic stream twice, and delivers the same graphic stream to the first graphic decoder 801 and the second graphic decoder 802, respectively.

According to the AV decoder 303 according to the third embodiment of the present invention, time for copying image data of an object does not occur, and parallel processing of the graphic decoders 801 and 802 is possible. Thus, it is possible to reduce the time for decoding the graphic stream into a three-dimensional image.

The components of the data recording / reproducing apparatus according to the present invention described above may be implemented as software or hardware to perform respective functions, or may be implemented by interworking with the software and hardware.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings, and the present invention is also provided. Naturally, it belongs to the range of.

1 illustrates an integrated use between a recording medium, a data reproducing apparatus and a peripheral device according to an embodiment of the present invention.

2 is a schematic structural diagram of a recording medium according to an embodiment of the present invention.

3 is a conceptual diagram of decoding an AV stream into a 3D image according to an embodiment of the present invention.

4 is a conceptual diagram of an offset according to an embodiment of the present invention.

5 is a conceptual diagram of a global offset according to an embodiment of the present invention.

6 is a conceptual diagram of a local offset according to an embodiment of the present invention.

7 is a structural diagram of a Presentation Composition Segment (PCS) according to an embodiment of the present invention.

8 is a structural diagram of an Interactive Composition Segment (ICS) according to an embodiment of the present invention.

9A is a structural diagram of an offset definition segment (ODS) according to a first embodiment of the present invention.

9B is a structural diagram of an offset definition segment (ODS) according to a second embodiment of the present invention.

10 is a block diagram of a data recording / reproducing apparatus according to an embodiment of the present invention.

11 is a block diagram of an AV decoder according to a first embodiment of the present invention.

12 is a block diagram of an AV decoder according to a second embodiment of the present invention.

13 is a block diagram of an AV decoder according to a third embodiment of the present invention.

Claims (30)

A video stream containing image data; A graphics stream for playing with the video stream; And A data area in which stereoscopic display information for displaying the graphic stream as a 3D image is recorded; The stereoscopic display information, And a first stereoscopic display information for displaying the graphic stream as a 3D image in units of screen pages. The method of claim 1, The stereoscopic display information, And second stereoscopic display information for displaying the object constituting the graphic stream as a three-dimensional image in units of screen pages. The method of claim 1, The stereoscopic display information, And an offset, which is information for moving the graphic stream in a horizontal direction. The method of claim 1, The stereoscopic display information, And a recording medium included in the graphic stream. The method of claim 1, The graphics stream is A recording medium which is a presentation graphic stream including fixed image data or an interactive graphic stream including image data in which a particular effect is displayed according to a user's selection. Recording a video stream including image data and a graphics stream for reproduction with the video stream in a data area of a recording medium; And Recording stereoscopic display information for displaying the graphic stream as a three-dimensional image in the data area; The stereoscopic display information, And first stereoscopic display information for displaying the graphic stream as a three-dimensional image in units of screen pages. The method of claim 6, The stereoscopic display information, And second stereoscopic display information for displaying the object constituting the graphic stream as a three-dimensional image in units of screen pages. The method of claim 6, The stereoscopic display information, And an offset, which is information for moving the graphic stream in a horizontal direction. The method of claim 6, The stereoscopic display information, A data recording method included in the graphic stream. The method of claim 6, The graphics stream is A data recording method comprising a presentation graphic stream including fixed image data or an interactive graphic stream including image data in which a particular effect is displayed according to a user's selection. Reading a video stream including image data and a graphic stream for reproduction with the video stream in a data area of a recording medium; Reading stereoscopic display information in the data area for displaying the graphic stream as a 3D image; And Reproducing the graphic stream as a 3D image according to the stereoscopic display information; The stereoscopic display information, And first stereoscopic display information for displaying the graphic stream as a three-dimensional image in units of screen pages. The method of claim 11, The stereoscopic display information, And second stereoscopic display information for displaying the object constituting the graphic stream as a three-dimensional image in units of screen pages. The method of claim 11, The stereoscopic display information, And an offset, which is information for moving the graphic stream in a horizontal direction. The method of claim 11, The stereoscopic display information, Data reproduction method included in the graphic stream. The method of claim 11, The graphics stream is A data reproduction method comprising a presentation graphic stream including fixed image data or an interactive graphic stream including image data in which a particular effect is displayed according to a user's selection. A recording unit for recording data on a recording medium; And Record a video stream including image data and a graphics stream for reproduction with the video stream in a data area of the recording medium; A control unit for controlling the recording unit to record stereoscopic display information for displaying the graphic stream as a 3D image in the data area, The stereoscopic display information, And first stereoscopic display information for displaying the graphic stream as a three-dimensional image in units of screen pages. The method of claim 16, The stereoscopic display information, And second stereoscopic display information for displaying the object constituting the graphic stream as a three-dimensional image in units of screen pages. The method of claim 16, The stereoscopic display information, And an offset, which is information for moving the graphic stream in a horizontal direction. The method of claim 16, The stereoscopic display information, And a data recording device included in the graphic stream. The method of claim 16, The graphics stream is A data recording apparatus, which is a presentation graphic stream including fixed image data or an interactive graphic stream including image data in which a particular effect is displayed according to a user's selection. A reproduction unit for reading data of the recording medium; A decoder for converting a graphic stream for reproduction with a video stream including image data into image data that can be output to a screen; And Control the reproduction unit to read the video stream and the graphic stream in a data area of the recording medium, and read stereoscopic display information for displaying the graphic stream in a three-dimensional image in the data area, And a controller configured to control the decoder to convert and reproduce the graphic stream into a 3D image according to the stereoscopic display information. The stereoscopic display information, And first stereoscopic display information for displaying the graphic stream as a three-dimensional image in units of screen pages. The method of claim 21, The stereoscopic display information, And second stereoscopic display information for displaying the object constituting the graphic stream as a three-dimensional image in units of screen pages. The method of claim 21, The stereoscopic display information, And an offset, which is information for moving the graphic stream in a horizontal direction. The method of claim 21, The stereoscopic display information, A data reproducing apparatus recorded in the graphic stream. The method of claim 21, The graphics stream is A data reproduction apparatus, which is a presentation graphic stream including fixed image data or an interactive graphic stream including image data in which a particular effect is displayed according to a user's selection. The method of claim 21, The decoder, A graphic decoder for converting the graphic stream into a graphic image which is a two-dimensional image and outputting the converted graphic image; The graphic decoder, And a data reproduction device for moving the graphic image in a horizontal direction by using the stereoscopic display information. The method of claim 26, The decoder, An offset decoder for calculating the stereoscopic display information of the graphic stream Data reproducing apparatus further comprising. 28. The method of claim 27, The offset decoder, A first offset decoder for calculating the stereoscopic display information which is information for moving the graphic image to the left; And A second offset decoder for calculating the stereoscopic display information which is information for moving the graphic image to the right Data reproducing apparatus comprising a. 29. The method of claim 28, The graphic decoder, A first graphic decoder configured to output the graphic image input to the first offset decoder; And A second graphic decoder for outputting the graphic image input to the second offset decoder Data reproducing apparatus comprising a. 29. The method of claim 28, The decoder, Copy the graphic image, A copy unit to output the copied graphic image to the first offset decoder or the second offset decoder Data reproducing apparatus further comprising.

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