KR20040034945A - Method for managing a graphic data of high density optical disc - Google Patents

Abstract

PURPOSE: A method for managing graphic data of a high density optical disc is provided to record graphic images matched with a main stream of the high density optical disc as a graphic image file and record navigation information for reading the graphic image in a source packet multiplexed to the main stream. CONSTITUTION: In the main stream of audio/video data recorded in a data area of a BD-ROM(Blu-ray Disc ROM), the navigation information such as the source packet is recorded in a front of a predetermined record section. A main video/audio stream is moving image data, still image data, or audio data played with the graphic images linked by the graphic information. An ODD(Optical Disc Drive) searches/reads the graphic images recorded in the graphic image file by referring to the graphic information recorded in the source packet, and sequentially plays the main video/audio stream together with the graphic images.

Description

Method for managing a graphic data of high density optical disc

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of managing graphic data of a high density optical disc such as a reproduction-only Blu-ray disc ROM (BD-ROM).

Generally, optical discs capable of recording and storing high-quality video data and high-quality audio data for a long time, such as a DVD (Digital Versatile Disc), have been developed and commercialized. The DVD-Video includes DVD-Video. , DVD-VR, DVD-Audio, and DVD-AR.

On the other hand, in the DVD-Video, graphic data reproduced in synchronization with video and audio data streams is defined in a 'DVD-private' format, which is sub-pictured and named.

In addition, the graphic data is a data format of a 2 bit depth with color pallet that can support up to 16 colors in one graphic image, and has a '720 X 480' image size, and a video and It is multiplexed with the audio stream and recorded on the DVD.

In addition, a run length coding scheme, which is defined separately in the DVD-Video format, is applied to the graphic data, and display control information of sub-picture data is included and recorded. The display control information includes display timing, color change, blending ratio change, display position, size selection information, and the like.

In addition, scroll-up / down, fade / wipe-in / out, and color change operations for various graphic effects are based on time. The navigation information for the palette information may be defined for each title and program chain, includes 16 color information, and includes subpicture count information and attribute information. Included is recorded.

In addition to the coding mode information and language information, the attribute information of the subpicture may include caption information, director comments, and aspect ratio information in consideration of various applications. Etc. may be included.

Accordingly, in an optical disc device such as a DVD-Player, as shown in FIG. 1, the main video image and the sub-picture unit (SPU) are described with reference to the navigation information. All or a part of the graphic image of the b) is properly blended to display the overlapped image based on the playback time.

For example, as shown in FIG. 2, the DVD-Video includes sub picture packs SP_PCK between the audio pack Audio_PCK and the video pack Video_PCK which are continuously recorded with a recording size of 2048 bytes. Intermittently recorded.

On the other hand, the subpicture pack is read out to perform a data reproduction operation to configure one subpicture unit (SPU). The subpicture unit (SPU) includes a subpicture unit header and a pixel. Data (Pixel Data) and Display Control Information (Display Control Information) are included.

Data size (SPU Size) of the subpicture unit is recorded in the subpicture unit header, and bitmap data of about 2 bits is recorded in the run length coding method in the pixel data. The pallet information for the pixel data is recorded and managed as separate navigation information.

Therefore, in an optical disc device such as a DVD player, the pixel data is reproduced and output in synchronization with the video and audio data. As described above with reference to FIG. 1, the main video is referred to with reference to the display control information. After all or part of the image of the (Main Video) and the graphic image of the sub-picture unit (SPU) are properly blended, various overlapping displays are displayed based on the reproduction time.

Recently, high-density optical discs with higher recording density than DVDs, for example, rewritable Blu-ray Discs (BD-RW), are expected to be developed and released. ), There are no graphic data management methods suitable for high-density optical discs such as BD-ROM, and moreover, graphic data of high resolution and main stream such as video, video or audio At the same time, there is an urgent need to prepare a concrete solution for more various displays.

The present invention was created in view of the above-described circumstances, and has a high density to enable recording and managing of high resolution graphic images and navigation information optimally for high-density optical discs such as a reproduction-only Blu-ray disc (BD-ROM). It is an object of the present invention to provide a graphic data management method of an optical disc.

1 illustrates a state in which a main video and a graphic image of a DVD-Video are superimposed,

2 is a diagram illustrating a process of reading and reproducing graphic data of a DVD video,

3 illustrates graphic images of various sizes and bit colors that are recorded and managed by the graphic data management method of the high density optical disc according to the present invention;

4 illustrates graphic images of various sizes and bit colors displayed and superimposed by a graphic data management method of a high density optical disc according to the present invention.

5 is a flowchart illustrating an embodiment of a method for managing graphic data of a high density optical disc according to the present invention;

6 to 8 illustrate embodiments of graphic information recorded and managed variously by the graphic data management method of the high density optical disc according to the present invention;

9 to 13 illustrate embodiments of graphic images displayed by the graphic data management method of the high density optical disc according to the present invention;

14 shows another embodiment of a method for managing graphic data of a high density optical disc according to the present invention;

Fig. 15 shows a graphic image read out and reproduced by the graphic data management method of the high density optical disc according to the present invention.

※ Explanation of code for main part of drawing

10: main video 20: the first graphic image

21: second graphic image 22: third graphic image

Graphic data management method for a high-density optical disk according to the present invention for achieving the above object, recording one or more graphic images corresponding to the main stream of the high-density optical disk, as a separate graphic image file, and linked the graphic image Navigation information for delivery is recorded in a source packet multiplexed on the main stream.

Hereinafter, various embodiments of a graphic data management method of a high density optical disc according to the present invention will be described in detail with reference to the accompanying drawings.

3 illustrates an embodiment of a graphic data management method of a high density optical disc according to the present invention, in which a plurality of graphic images corresponding to one main picture image are recorded. The size and color depth of each graphic image are changed differently.

For example, as illustrated in FIG. 3, a graphic image corresponding to a main picture image having a size of '1920 X 1080' may be divided into a graphic image of a '1920 X 1080' size and a '1280 X 1080'. It will record and manage each size graphic image and '640 X 1080' size graphic image.

In addition, a color degree of 8 bits or less is applied to the graphic image of '1920 X 1080' size, and a color degree of 8 bits or 16 bit or less is applied to the graphic image of the '1280 X 1080' size. For the '640 X 1080' size graphic image, a color degree of 8 bits, 16 bits or 24 bits or less is variably applied.

Meanwhile, a plurality of graphic images, for example, three different graphic images (Graphic Image 1,2,3) may be overlapped and displayed at the same time in one main picture image, for example, each graphic. The images may have different sizes and bit colors,

The graphic image superimposed and the navigation information thereof may be multiplexed with the main video and audio streams to be recorded and managed as described above.

5 to 8 illustrate a state in which a graphic image and navigation information are multi-recorded in a main stream by a graphic data management method of a high density optical disc according to the present invention. For example, a reproduction-only Blu-ray disc (BD- In the main stream of audio and video data recorded in the data area of the ROM, as illustrated in FIG. 5, a plurality of graphic images #Graphic Image # 1-#n have predetermined recording sections A, B, and C. FIG. In the multiplexing state.

Meanwhile, graphic images recorded in the predetermined recording section, for example, 'A' section, are graphic images to be displayed superimposed with the main stream recorded after the 'A' recording section. Extra Header) and 192 bytes of Source Packets composed of 188 bytes of MPEG2 Transport Packets (TP Packets), in which the graphic images are recorded alone or in the main stream. And can be recorded in a multiplexing state.

The 4-byte transport extra header includes two bits of copy protection information and navigation information for a 30-bit graphic image, for example, a graphic image start end flag (Image_start_end_flag). Graphic information such as the like may be recorded and managed, or time information indicating an arrival time of a packet may be included and recorded.

That is, when the source packet corresponds to a graphic image, graphic information such as copy protection information and a graphic image start end flag Image_start_end_flag are recorded in the transport extra header. When the source packet does not correspond to the graphic image, the transport extra header includes copy protection information (Copy Info) and time information (Arrival Time Stamp) indicating the packet arrival time.

In the header information of the MPEG2 transport packet, a unique packet ID (PID) not used in a rewritable Blu-ray Disc (BD-RW) or the like, for example, 'PID = 0 x 1023' value is used. Can be recorded.

On the other hand, as described above, by packetizing and recording a plurality of graphic images recorded within a predetermined recording section into an MPEG2 transport stream, compatibility with a moving image of a rewritable Blu-ray Disc (BD-RW) can be maintained. In a predetermined recording section, when a plurality of graphic images and a main stream are multiplexed and recorded, the main stream may be either MPEG2 moving picture, audio or still image.

As shown in Fig. 6, at the beginning of the predetermined recording section, a source packet of graphic information for reading out and reproducing the graphic images recorded in the recording section is recorded. With reference to the information, the number and data size of the graphic images recorded thereafter are checked, and the corresponding graphic data reproduction operation is performed.

On the other hand, the graphic images recorded in the predetermined recording section as described above can be identified by the graphic information packet. In this case, as shown in Fig. 7, the graphic information recorded in the payload of the source packet is graphic. Start end flag (graphic_start_end_flag), graphic image number information (number_of_images), image information (image_info) indicating the properties and characteristics of each graphic image, data size (image_data_size) or start position information of each graphic image. Can be recorded.

For example, when the graphic start end flag (graphic_start_end_flag) is '0', it indicates the start of graphic data, and when '1' indicates the end of graphic data, a part of the field of graphic information defined as described above. Can be recorded and managed as information for one graphic image or a whole graphic image.

In addition, graphic images recorded within a predetermined recording period may be identified by a transport extra header as described above. In this case, as illustrated in FIG. 8, the transit of the source packet recorded at the beginning of the graphic image may be used. In the port extra header, two bits of copy protection information and 30 bits of graphic information are recorded.

In the transport extra header of the other source packet, 2 bits of copy protection information and 30 bits of other information, for example, an Arrival Time Stamp indicating the packet arrival time, are recorded. The 30-bit graphic information may be defined in the same manner as the data field of the graphic information recorded in the payload of the source packet described above with reference to FIG. 7.

On the other hand, when the reproduction-only Blu-ray disc in which the graphic image and the graphic information are recorded and managed as described above is inserted and seated in the apparatus, the optical disk apparatus collectively collects the graphic data recorded in the predetermined recording section as shown in FIG. The pre-loading operation of pre-loading the data into the graphic image buffer (unsigned) provided in the apparatus is performed.

Then, a plurality of graphic images pre-stored in the graphic image buffer while sequentially playing the main stream, for example, moving image video, audio or still images recorded after the predetermined recording section, are described with reference to FIGS. 7 to 8. With reference to the graphic information described above, the video is reproduced and output together with the video, audio or still image.

Meanwhile, as illustrated in FIG. 10, when the graphic image is reproduced and output together with a video, the graphic image is overlaid and displayed at a specific position on the video screen. On the video screen, a plurality of graphic images are displayed or overlapped at the same time. Or may be sequentially displayed in a superimposed manner, and the graphic image may be displayed at different positions, respectively.

In addition, as illustrated in FIG. 11, a graphic image may be reproduced and outputted without an video along with an audio reproducing operation. In this case, one or a plurality of graphic images may be displayed alone at a specific position on the screen. A plurality of graphic images may be displayed at the same time, or may be sequentially displayed alone, such as an animation movie. The graphic images may be displayed at different positions, respectively.

As shown in FIG. 12, when the graphic image is reproduced and output together with the still image, the graphic image is overlaid and displayed at a specific position on the still screen. On the still screen, a plurality of graphic images are displayed at the same time. Alternatively, the images may be sequentially overlaid and the graphic images may be displayed at different positions.

In addition, as shown in FIG. 13, a graphic image may be reproduced and output together with an audio and still image reproducing operation. In this case, the graphic image is superimposed and displayed at a specific position on the still screen. The graphic images of may be displayed at the same time or overlapped sequentially, and the graphic images may be displayed at different positions, respectively.

Meanwhile, the graphic image displayed as described above is recorded and managed as a separate graphic image file, and navigation information thereof may be recorded and included in a source packet multiplexed into the main video and audio stream, which will be described in detail. Is as follows,

Fig. 14 shows another embodiment of the method for managing graphic data of a high density optical disc according to the present invention. For example, audio and video data recorded in a data area of a reproduction-only Blu-ray disc (BD-ROM) can be obtained. In the main stream, as shown in Fig. 14, a source packet on which navigation information for a graphic image, for example, graphic information (Graphic_Information) is recorded, is recorded at the head within a predetermined recording section.

On the other hand, the main video and audio stream recorded in the predetermined recording section is moving picture video, still image or audio data that is reproduced and displayed together with at least one or more graphic images linked by the graphic information, wherein the source packet is 4 It consists of a TP Extra Header of Byte and MPEG2 Transport Packet of 188 Bytes.

And. In the header of the MPEG2 transport packet, a unique packet ID (PID) not used in a rewritable Blu-ray Disc (BD-RW) or the like, for example, 'PID = 0 x 1023' may be recorded.

In addition, the payload of the MPEG2 transport packet includes, as illustrated in FIG. 14, a file name of a separate graphic image file including a plurality of graphic images, and a graphic image file name. An index number for referencing each graphic image recorded and included in the graphic image file is recorded.

And. The paid load of the MPEG2 transport packet includes a presentation start & end time for graphic images linked by the index number, and a presentation position of a graphic image to be superimposed on the main video. And attribute information of a graphic image and the like. The attribute information may include and record various information such as a coding method of the graphic image and size information of the graphic image.

Meanwhile, in the optical disk device, at least one or more graphic images recorded in the graphic image file are searched and read with reference to the graphic information recorded in the source packet, and together with the main video and audio stream recorded in the predetermined recording section. A series of data reproduction operations for cooperative reproduction are performed.

For example, when the source packet recorded with the graphic information is read out while playing the main video and audio stream recorded in the data area of the reproduction-only Blu-ray disc, as shown in FIG. 15, the source packet is read. After searching the graphic image file with reference to the graphic information recorded in the file, one or more graphic images corresponding to the index number included in the graphic information are read and stored in a graphic image buffer (not shown) included in the device. Done.

Then, one or more graphic images stored in the graphic image buffer while sequentially playing a main stream, for example, moving picture video, audio or still images, recorded in a predetermined recording section after the source packet, are described above with reference to FIG. 14. With reference to the graphic information, the video is reproduced and output together with the video, audio or still image.

The above-described preferred embodiment of the present invention has been disclosed for the purpose of illustration, and is applicable to a reproduction-only Blu-ray Disc (BD-ROM) as well as a rewritable Blu-ray Disc (BD-RW). Those skilled in the art will be able to improve, change, substitute, or add other various embodiments within the spirit and scope of the present invention disclosed in the appended claims.

According to the method for managing graphic data of a high density optical disc according to the present invention as described above, at least one graphic image is recorded as a separate graphic image file on a high density optical disc such as a reproduction-only Blu-ray disc (BD-ROM), and the graphic image By recording and managing the navigation information for linking and reading and reproducing the data into a source packet multiplexed with the main stream of the high density optical disc, one or a plurality of graphic images are referred to as the navigation information when the main stream of the high density optical disc is reproduced. Or it is a very useful invention that can be displayed on the screen of the still image or displayed alone with audio.

Claims (6)

Recording one or more graphic images corresponding to the main stream of a high density optical disc into a separate graphic image file, And navigation information for linking and reading the graphic image into a source packet multiplexed in the main stream. The method of claim 1, The source packet includes at least one of a graphic image file name, a graphic image index number, a graphic image start end time, a graphic image display position, and a graphic image attribute to read and reproduce one or more graphic images recorded in the graphic image file. Graphic data management method for a high density optical disc, characterized in that the recording. The method of claim 1, And the source packet is recorded at a head of a predetermined recording section of a main stream corresponding to the graphic image. The method of claim 3, And at least one graphic image linked and read by the navigation information recorded in the source packet is reproduced and displayed together with the main stream recorded in the predetermined recording section. The method of claim 1, The source packet includes a transport extra header and an MPEG2 transport packet, and in the header of the MPEG2 transport packet, a unique source for indicating that the source packet is a source packet in which navigation information for a graphic image is recorded. Graphic data management method for a high density optical disc characterized in that the packet ID information is recorded. The method of claim 1, A high density optical disc characterized by reading at least one graphic image included in the graphic image file by referring to the navigation information recorded in the source packet, and then displaying and reproducing the main stream recorded in the predetermined recording section. Graphic data management method.