• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PURPOSE: A method for managing subtitle data of a high-density optical disk is provided to effectively share a CLUT(Color Loop Up Table) for object graphic images of the same pixels, thereby efficiently recording subtitle data of the graphic images on a BD(Blu-ray Disc)-ROM and minimizing palette and transparency information. CONSTITUTION: A DVB(Digital Video Broadcasting) encapsulator(20) converts graphic images in a similar format to DVB. A TS packet encoder(21) encodes the converted graphic images into TS packets proper for a BD-ROM. The encoded TS packets are recorded with video data and audio data in a data area of the BD-ROM. Plural objects included in one region are converted in PNG(Portable Network Graphic) format. A PTS(Presentation Time Stamp) and a DTS(Decoding Time Stamp) are included in a PES(Packetized Elementary Stream) packet corresponding to the one region.
    公开号:KR20040066655A
    申请号:KR1020030003783
    申请日:2003-01-20
    公开日:2004-07-27
    发明作者:김창범；서강수；김병진
    申请人:엘지전자 주식회사；
    IPC主号:
    专利说明:

    Method for managing subtitle data of high density optical discs
    [11] The present invention relates to a method of managing subtitle data of a high density optical disc such as a reproduction-only Blu-ray Disc ROM (BD-ROM).
    [12] In general, optical discs capable of recording and storing high-definition video data and high-quality audio data for a long time, for example, a digital versatile disc (DVD), have been developed and released and are commercially available. ROM, and rewritable DVD-RW (DVD-Rewritable).
    [13] In the DVD-ROM, video and audio streams are recorded and stored in a program stream (PS) packet defined by the MPEG method. As shown in FIG. 1, the DVD-ROM has a recording size of 2048 bytes. One physical sector is recorded and managed in one pack.
    [14] The pack includes a pack header (Pack_header) including a pack start code (Pack_start_code), an SCR, a program_mux_rate, a stuffing length, and a video, audio, and subpicture. Such packets are recorded including.
    [15] In the DVD-ROM in which one physical sector is recorded and managed in one pack as described above, subtitle data such as a subtitle image superimposed and displayed on the main video image includes a part of the data area of the DVD-ROM. In the interval, multiple recordings can be made with the main video and audio streams.
    [16] Meanwhile, as shown in FIG. 2, the optical disc device such as a DVD-Player may include an optical pickup 11, a VDP system 12, a D / A converter 13, and the like. The VDP system 12 may include a PS demux 120 and a decoding block 121.
    [17] The VDP system 12 reads and reproduces the video and audio streams recorded as program stream packets in the DVD-ROM 10. In the PS demux 120, the data of the DVD-ROM is read. In some sections of the region, the subtitle data recorded together with the main video and audio streams are demuxed into a packetized elementary stream (PES) and output to the decoding block 121.
    [18] In the decoding block 121, the subtitle data of the packetized element stream (PES) output through the PS demux 120 is decoded so that the subtitle data can be superimposed with the main video image as a subtitle image. It performs a series of decoding operations.
    [19] Accordingly, the user can simultaneously view the caption video of the subtitle data recorded in some sections of the data area of the DVD-ROM together with the main video video.
    [20] Recently, standardization of high-density optical discs, such as a playback-only Blu-ray disc (BD-ROM), which has a higher recording density than a DVD, has been discussed among related companies. There is no efficient management method for recording and reproducing and managing subtitle data of a graphic image based on a bitmap in a data area of a ray disk.
    [21] The present invention was created in view of the above circumstances, and after subtitle data of various graphic images are configured in a DVB (Digital Video Broadcasting) format, a high-definition optical disc such as a dedicated Blu-ray disc (BD-ROM) can be used. How to manage subtitle data of a high density optical disc to encode and record in a suitable transport packet, but to efficiently share a color look up table (CLUT) for object graphic images of the same pixel To provide a, that is the purpose.
    [1] FIG. 1 shows a configuration of a data pack of a DVD-ROM.
    [2] FIG. 2 shows a configuration of a DVD player for reading out and playing back data recorded in the DVD ROM. FIG.
    [3] 3 is a block diagram of an optical disc recorder to which the subtitle data management method of the high density optical disc according to the present invention is applied.
    [4] 4 illustrates a PS packet structure according to the first embodiment of the present invention.
    [5] 5 illustrates a PS packet structure according to a second embodiment of the present invention.
    [6] 6 illustrates an object image outputted by cut-in and cut-out time according to the present invention.
    [7] ※ Explanation of code for main part of drawing
    [8] 10: optical disc 11: optical pickup
    [9] 12: VDP system 13: D / A converter
    [10] 20: DVB Encapsulator 21: TS Packet Encoder
    [22] In the subtitle data management method of the high density optical disc according to the present invention for achieving the above object, after converting the graphic image to be recorded as the subtitle data on the high density optical disc into a DVB format and configured, (DVB) format data is encoded and transported into a transport packet, and the color lookup table for object graphic images of the same pixel is recorded and managed in common.
    [23] Hereinafter, a preferred embodiment of a subtitle 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.
    [24] First, the subtitle data management method of the high density optical disc according to the present invention can be applied to an optical disc recorder for authoring a high density optical disc such as a BD-ROM, for example, a graphic image based on a bitmap. 3, a DVB Encapsulator 20 is used to convert the format into a DVB-like format, and then a TS Packet Encoder 21 is used to make a BD. It is encoded into a transport packet suitable for ROM.
    [25] The encoded transport packet is multi-recorded with main video and audio data in a data area of a BD-ROM. The frame graphic image of the subtitle is a page defined in a DVB format. In the present invention, one page is managed in one region.
    [26] In addition, a plurality of objects included in the one region are converted and configured into a Portable Network Graphic (PNG) format, and a presentation time stamp (PTS) and decoding are included in a PES packet corresponding to the one region. Each time stamp DTS is recorded and included.
    [27] On the other hand, as a first embodiment according to the present invention. The PES packet structure includes a decoding time stamp (DTS) for designating a decoding time of subtitle data and a presentation time for designating a presentation type of subtitle data, as shown in FIG. 4. A stamp PTS is recorded and included, and a plurality of color lookup tables (Multi-CLUTs) corresponding to one region are recorded and recorded. The color lookup table includes a global palette and a universal transparency array. It is written in (Global transparency array).
    [28] In the PS packet structure, a region composition segment (Region_composition_segment), an object definition segment (Object_define_segment), a segment segment (PNG_segment), and a display control sequence segment (Display_control_ sequence_segment) are recorded. The number information of the object, the ID of each object, and the horizontal / vertical position information on which the object is displayed are recorded.
    [29] In addition, the object definition segment includes an ID of the object, a color lookup table ID, and a PIEN ID, and the PI segment includes the ID of the PI and chunks corresponding to the object image. The display control sequence segment includes a display sequence.
    [30] The display sequence may include information such as an object ID, a cut-in time and a cut-out time, and an MNG chunk for the display control sequence.
    [31] As a second embodiment according to the present invention, the PS packet structure includes a decoding time stamp (DTS) for designating a decoding time of subtitle data and a presentation of subtitle data, as shown in FIG. Each presentation time stamp (PTS) for designating a type may be included and recorded, and one universal color lookup table (One Global CLUT) corresponding to one region may be recorded.
    [32] In addition, the one color lookup table is recorded in a global palette and a global transparency array, and the PS packet structure includes a region configuration segment, an object definition segment, and an engine segment. , And display control sequence segments are recorded.
    [33] On the other hand, the region configuration segment includes information on the number of objects, ID of each object, and horizontal / vertical position information on which the object is to be displayed. The object definition segment includes the ID of the object and the PG ID. However, the color lookup table ID is not separately recorded.
    [34] The PG segment includes and records a PNG chunk corresponding to the PG ID and the object image, and the display control sequence segment includes a display sequence, wherein the display sequence includes an object ID and Information such as cut-in time and cut-out time for display control sequences, and Partial Palette (PPLT) chunks are recorded.
    [35] Therefore, in the present invention, a plurality of button menu images corresponding to a plurality of objects appearing in one region, for example, a normal state, a selection state, and an action state may be identical. In the case of having image pixels, but having different palette and transparency colors and transparency, the objects are classified and managed by different object IDs (Object_id), and the same PG IDs (PNG_id) are shared.
    [36] Then, any one color lookup table is shared and used among a plurality of color lookup tables, and the cut-in time and the cut-out time defined for the display effect are presented as shown in FIG. 6. It is expressed in time relative to the stamp.
    [37] That is, the cut-in time is time information for actually displaying a subtitle or graphic, and the cut-out time is time information for actually subtitle or graphic disappearing, and the cut-in and cut-out time are based on a presentation time stamp. This is expressed in relative time, and uses the same fields as ticks_per_second used in the MNG format to synchronize with the main video.
    [38] For example, the ticks second may be used as a unit for calculating a frame rate. If Ticks_per_second = 2997 is assumed and one frame is defined as 100 ticks, the frame rate is 2997 (ticks / sec). / 100 (ticks / frame) = 29.97 Hz, and when the cut-in and cut-out times are defined as the number of ticks as described above, synchronization with the main video becomes more accurate.
    [39] As mentioned above, preferred embodiments of the present invention are disclosed for the purpose of illustration, and the DVB format, the PNG format, and the MNG format are well-known techniques currently used, and those skilled in the art will appreciate the following appended claims. Within the technical spirit of the disclosed invention and its technical scope, other various embodiments may be improved, changed, replaced or added.
    [40] The subtitle data management method of the high density optical disc according to the present invention and the high density optical disc according to the present invention comprise the subtitle data of a graphic image recorded on a high density optical disc such as a reproduction-only Blu-ray disc (BD-ROM) in DVB format. After encoding the encoded data into MPEG 2 TS packets suitable for playback-only Blu-ray discs, it is possible to efficiently share the color lookup table (CLUT) for object graphic images of the same pixel. It is a very useful invention that the subtitle data of an image can be efficiently recorded on a reproduction-only Blu-ray disc, and the color palette and transparency information for a plurality of object graphic images can be minimized.
    权利要求:
    Claims (6)
    [1" claim-type="Currently amended] After converting a graphic image to be recorded as subtitle data onto a high density optical disc into a DVB format, the DVB format data is encoded into a transport packet for recording.
    A method of managing subtitle data of a high density optical disc, characterized in that the common recording and management of a color lookup table for object graphic images of the same pixel.
    [2" claim-type="Currently amended] The method of claim 1,
    The high density optical disc is a reproduction-only Blu-ray Disc ROM. The subtitle data management method of the high density optical disc.
    [3" claim-type="Currently amended] The method of claim 1,
    And the graphic image corresponds to a plurality of color lookup tables.
    [4" claim-type="Currently amended] The method of claim 1,
    And the graphic image corresponds to one general-purpose color lookup table.
    [5" claim-type="Currently amended] The method of claim 1,
    And a decoding time stamp (DTS) and a presentation time stamp (PTS) are respectively recorded in the PS packet structure configured to be converted to the DVB format.
    [6" claim-type="Currently amended] The method of claim 1,
    In the PS packet structure configured to convert to the DV format, the cut-in time and the cut-out time information for the object graphic image are included and recorded.
    And the cut-in time and the cut-out time are recorded and managed in a ticks_per_second manner defined in an MNG format.
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    同族专利:
    公开号 | 公开日
    KR100930349B1|2009-12-08|
    US20040146283A1|2004-07-29|
    US7609943B2|2009-10-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2003-01-20|Application filed by 엘지전자 주식회사
    2003-01-20|Priority to KR1020030003783A
    2004-07-27|Publication of KR20040066655A
    2009-12-08|Application granted
    2009-12-08|Publication of KR100930349B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020030003783A|KR100930349B1|2003-01-20|2003-01-20|Subtitle data management method of high density optical disc|
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