MXPA01002072A - Numbering of video objects and cells - Google Patents

Abstract

A method of recording an encoded bit stream, said encoded bit stream representing a plurality of video objects comprising a sequence of cells together constituting a part of an MPEG2 Program Stream, on a disc like record carrier, such as an optical disc. The method comprises recording video objects comprising a sequence of contiguously recorded cells, each cell comprising a unique cell identification number within a video object, recording of a playback sequence of cells that defines a playable program chain of cells, wherein said sequence comprises references to the cell identification numbers and recording navigation data within said cells comprising said cell identification numbers. The method further comprises dividing at least one previously recorded cell into new cells and/or overwriting at least one previously recorded cell at least partly with a new cell, assigning the at least one new cell with a cell identification number and recording a new playback sequence of cells employing the at least one new cell, the new playback sequence not necessarily employing an incremental numbering of cell identification numbers. Hereby a time consuming renumbering of all cells is being avoided.

Description

Numeration of objects and video cells.

SCOPE OF THE INVENTION The invention is a method for recording encoded information signals, as mentioned in the right preamble 1 on a disk such as a disc tray, such as an optical read disk. The invention is also treated to a recording apparatus for carrying out said method.

BACKGROUND OF THE INVENTION The DVD-Video optical disc format is defined in the DVD Specifications for Read Only Disc, part 3: Video Specifications (version 1.0, August 1996). Some relevant parts of the previous one are attached, for example, in European Patent Application EP 724 264 and US Patent 5 784 528, respectively D1 and D2 in the list of referred documents that follow this description. Both documents are incorporated herein by reference.

The DVD-Video format, as defined in these DVD Specifications for Read Only Disc and developed in D1 and D2, was developed to store movies and other video material on read-only DVD media. Some features of the DVD-Video format make it less suitable for real-time recording applications.

However, it is desirable to create and record video streams and associated data structures in real-time rewriting media, which, preferably, should be almost identical to the structures defined in the DVD-Video format. These rewrite discs should be playback compatible with most of the installed base of DVD-Video cassettes. The method according to the invention describes a novel and inventive format for real-time compatible DVD-Video recording of video streams, hereinafter referred to as Real Time DVD Video Recording or, shortly, DVD-Video Recording (DVD Video Recording). The defined format is intended for home video recordings on an optical medium that is compatible with playback with DVD-Video cassettes. Said DVD-Video format requires the continuous contiguous assignment of data for a VTS. This leads to many problems, as some of the data is overwritten with the new recordings.

When an edition is made, or when a part of a title is overwritten, the numbering of Cells and Video Objects (VOB) no longer follows the rules of the DVD-Video. DVD-Video prescribes ascending numbering of video objects and cells. When recording the disc for the first time, this requirement can usually be met. However, when overwriting (partially) old recordings, or when the user edits, the ascending numbering can not be maintained. Since the numbering of the Cells and the VOB is incorporated into the real-time data in the Navegation Packs (NV-PCK), it takes a long time to correct the current. Also, according to the rules of DVD video, it is not allowed to start inside a cell. A Program Chain that defines a playback sequence of Cells must consist of a Cell start address and a Cell address address. The dividing or partially overwriting a Cell leads, therefore, to new Cells. This has a consequence when adding a new cell identification number. Since Read Only Video DVD rules require ascending numbering of Video Cells and Objects, all Cells and Video Objects must be numbered again. This implies a long process of navigation within the Cells.

OBJECT AND SUMMARY OF THE INVENTION As a consequence, among other things, one of the objects of the invention is to eliminate the aforementioned disadvantages. According to one of its aspects, a method of recording the invention is characterized as mentioned in the characteristic part of law 1. By allowing a non-ascending numbering of the Cells * in a playback sequence, the long process of updating is avoided the navigation data. According to another advantageous aspect of the invention, the method is characterized as mentioned in the characteristic part of right 2. The need to number the Video Objects again is avoided. Other advantageous aspects are also mentioned in other dependent rights.

BRIEF DESCRIPTION OF THE DRAWINGS These and other aspects and advantages of the invention will be apparent and described in more detail below with reference to the disclosure of preferred expressions, in particular with reference to the accompanying figures, wherein: Fig. 1 shows the structure of logical data of a DVD disc corresponding to an expression of the DVD Video Recording, according to the invention; Fig. 2 shows in more detail the structure of the Video Management area (VMG) of fig. 1; Fig. 3 shows in more detail the structure of the Video Titration Equipment Information (VTSI) area of fig. 1; Fig. 4 shows the structure of the Video Management Administration Table (VTSI_MAT) of fig. 2; Fig. 5 shows the structure of the Program Chain Information (PGCI) area Fig. 6 shows an example of the Information of Chain of Program of Titles (PGCI); Fig. 7 shows a recording apparatus according to a first description of the invention, the respective units then are illustrated in the following figures of which Fig. 8 shows an A / V input unit; Fig. 9 shows a CODEC unit; Fig. 10 shows an output unit A? Fig. 11 shows a control unit and Fig. 12 shows a system control unit DESCRIPTION OF THE ADITAMENTS The structure to be revealed later explains the DVD-Video compatibility between the real-time Video Recording Format and specifies how this can be used by recorders to create compatible DVD-Video playback discs. To overcome the limitations of the actual recording time of the DVD-Video format for read-only discs, a number of changes have been made to the data organization and the use of some recording parameters in real-time data stream . The use of Títutos and Menúes is restricted to improve the capacity of change of the discs that can be rewritten between recorders. In addition to this, strict rules are defined for the playlists, which can be created by the user to define playback sequences of parts of the recorded titles. First, a list of definitions is given Access Unit Coded representation of a presentation unit. See ISO / IEC 13818-1 concerning MPEG-2 systems, document D3 in the list of referred documents that can be found at the end of this description, for a more detailed definition of MPEG audio and video access units. »Buffer Cell Last cell of a Video Object (VOB) containing just one Video Object Unit (VOBU). The Buffer Cell is not used by any Program Chain (PCGC). The Cell ID of a Buffer Cell is equivalent to 255.

Cell Sequence of one or more Video Object Units (VOBU). The first VOBU of a cell must contain video data. The Cells are the basic presentation units for the Program Chains (PGC).

Chapter Subdivision of a title. Another word for Part_of_Title (PTT).

Short DVD-VR Format for Video Format Specifications for Real Time DVD Video Tape recorder.

DVD format - Video for read-only discs Format as defined in the DVD specifications for Read Only Disc Part 3: Video Specifications (version 1.0, August 1996, elements that have been rebelled in D1 and D2.

DVD format - Video for discs that can be rewritten Format of structures related to DVD - Video with the modifications specified in this rebellion.

Elemental Current An elementary stream is a generic term for a sequence of encoded video, encoded audio, encoded graphics, or other access units that can be correctly decoded by a hypothetical decoder operating without special control from an external controller.

Free Space Record that is represented by a Free Space Title in the Title Search Chart. If the last Recording is free space it is not represented in this table.

Title of Free Space Full Title or Title of List of Options that can not be executed since the related Program Chain Information contains a command to prevent this. ExecutionTime (), Search_Time (), PTT_Execute () and PTT_Search for a Free Space Title are blocked. Cell information in the Free Space Program Chain may not be reliable. Full Title Title representing a Recording When a Full Title is executed, all the complete Cells (Except the Buffer cells) contained in the Recording are interpreted in the order of distribution in the VTS title VOBS. Complete titles can be accessed through the Title Menu.

Group of Paintings (GOP) Series of coded paintings starting with a GOP- Heading followed by an intra-coded painting. The GOP represents more than 36 fields displayed at a rate of 59.94 Hz or 30 fields at a rate of 50 Hz.

Program Current PEG-2 (MPEG-2 PS) Program current as defined in ISO / IEC 13818-1 related to MPEG-2 systems, document D3 in the list of referred documents that can be found at the end of this description.

Muitiplexada current A multiplexed current is a single part of a current, combining one or more elementary streams that can be executed in synchrony.

List of Options (or Title of List of Options) The title represents a sequence of playback of cells from a Recording. List of Options is a path accessible to the Titles Menu.

Program Chain (PGC) Playback Sequence of cells for the presentation of a Menu or a Title.

Title Real Title Complete or Title of List of Options that is not a Title of Free Space.

Recording Contiguous piece of a VTS Title VOBS, containing an integral number of MPEG-2 PS packages.

The VTS VTS title is sectioned in adjacent Recordings that do not necessarily coincide with the VOBs in the VOBS.

Title User accessible unit listed in the Search Scorer Table of Title.

Title Menu Menu that gives the user access to execution lists and optionally to Full Titles. Title Search Table Table in the Video Manager listing all the Option Lists and Full Titles available on the disk. This is a starting point to find the data that is relevant to running a Video Title Manager (VMG). DVD data structures - Video containing information about the recorded video data and the Titles Menu. The Title Search Pointer Table is one of the elements of the Video Manager.

Video Object (VOB) A video object is (a part of) a sequence of contiguously recorded cells, together they constitute (a part of) an MPEG-2 Program Stream. An integral number of MPEG-2 program stream packets may be missing at the start of the first VOB cell, if this cell is not used by any title. The last Cell of a VOB is a Buffer Cell. A VOB can contain a video elementary stream. Nozzles in the video stream are allowed under the conditions established by the DVD specifications - Video. According to DVD-Video specifications, a VOB can also contain more than eight audio streams (in elementary audio streams and / or in private streams) and up to 32 Sub-film streams. The DVD-VR format only allows one Audio stream and one Sub-movie stream in the same VOB.

Video Object Unit An integral number of MPEG-2 Program Stream packages representing a presentation period between 0.4 and 1.0 seconds. The last VOBU of a cell has a maximum presentation period of 1.2 seconds. When the VOBU contains Video, the video data consists of a whole number of GOPs and starts with a sequence header, a GOP header and an intra-coded movie. A Sub-movie unit is optional in a VOBU and can not cross the VOBU limits. The SPU Video Object Equipment (VOBS) A collection of VOBs that have been recorded.

The VOBs that are used for the menus are stored in the VOBS Video Manager (VMGM_VOBS). The VOBs that are used for the titles are stored in the VTS title VOBS (VTSTT_VOBS). Figure 1 shows the general data structure in accordance with the real time of the Video Recording format. The data structure includes an Input area (Ll), a Volume (VOL) and a File System (FS) area, a Video Management area (VMG), a Video Title (VTS) equipment, a area reserved for other structures (OTHERS) and an Output area (LO) as is known from the data structure DVD-ROM. Not shown specifically in Figure 1 is the Presentation Control Information (PCI) and the Data Search Information (DSI) with the Video Object Team for VTS Titles (VTSTT_VOB), both scattered in the Navigation Packs (NV_PCK). ) of each Video Object Unit (VOBU). The organization of data according to the Real Time of the Video Recording format will be discussed first in a general way. With respect to Video Manager (VMG) it highlights the following: the title structure on a disc contains only a Video Title Equipment (VTS). The Root Menu must contain a fake Program Chain (PGC) with a pre-command by calling the Title Menu. No other Video Title Equipment (VTS) must be present on the disk. Consequently, the Video Equipment does not contain a Video Object Team for a Video Title Equipment Menu (VTSM_VOBS). The Video Object Team for Video Title Equipment Titles (VTSTT_VOBS) of the Video Title Team has the content of the recorded video.

Claims (1)

With respect to the Video Object Equipment (VOBS), the Video Objects (VOBs) and the Cells, it highlights the following. A Video Object (VOB) is (a part of) a sequence of contiguously recorded Cells, together they constitute (a part of) an MPEG-2 Program Stream as defined in D4. An integral number of MEPEG-2 Program Streams may be forgotten from the start of the first Video Object Cell (VOB), if this Cell is not used for any title. The last Cell of a Video Object (VOM) is a Buffer Cell, which is not used for any title. A Video Object Team (VOBS) is a collection of Video Objects (VOBs) recorded contiguously. Video Objects (VOBs) and Cells on a disc that can be rewritten are not completely in accordance with the Video Specifications for a read-only DVD Disc as it is revealed on D2 and D4. The following exceptions are necessary or required. 1) The DVD - Video specifications demand that the Video Object (VOB) starts with a Clock Reference System (SCR) equal to zero. This is not required for DVD-VR discs. 2) The deployment of the Video stream from a Video Object (VOB) does not have to start with a stop field nor does it have to end with a background field. The DVD - Video specification prescribes an ascending numbering of Video Objects (VOBs) and Cells. When the disc is recorded for the first time such a requirement must be carried out. However, when old recordings are (partially) written, or when editing is done by the user, it may not be possible to maintain an ascending numbering. 1) To overcome this problem the DVD - VR format requires that the Video Object Identification Number (VOB ID) of all Video Objects 2) (VOBs) is equal to. In addition to this the Cell Identification numbers (except number 255) are unique but may be non-sequential. 3) Video Objects (VOBs) and Cells contain Navigation Packs (NV_PCK) with advanced references to facilitate advanced search. Some of these advanced references may not be known at the time of recording and must then be encoded with values that make the legacy of the play mechanisms behave acceptably. 4) The navigation packages (NV_PCK) also contain a parameter specifying the presentation of a completion time of the last video frame of the Video Object (VOB). This parameter may not be done correctly in real time in all cases. To solve this problem a high number will be recorded for this parameter. A Buffer Cell at the end of a Video Object (VOB) ensures that the end of a Video Object (VOB) is never reached during a play back. With regard to recordings, highlights the following. The Video Object Team for Titles in a Video Title Team (VTSTT_VOBS) can be divided into a collection of adjacent pieces, called Recordings, that do not necessarily coincide with the Video Objects (VOBs). Recordings include an integral number of MPEG-2 PS packages. The Recordings related to the division of the content as it is presented to the user. With respect to Full Titles, Lists of Options or Free Space, the following stands out. For each Record two Uno_Secuencial_PGC_Titles are created: a Complete Title and a List of Options. The Full Title defines play back of all the complete Cells (except Buffer Cells) of a recording in the order of distribution in the Video Object Team (VOBS). The list of options may be different from the full title. If so, this defines the play back of a subset of Cells that are executed by a full Title. Both Full Titles and Options Lists are represented as Real Titles, unless they are labeled as Free Space. When a Full Title is deleted by the user both the Full Title and the List of Options in the Title Search Pointer Table (TT_SRPT) are labeled as Free Space by setting a unique value of Playback Character (TT_PB_TY). If two consecutive Full Titles are deleted, the entries in the Title Search Chart (TT_SRPT) must be combined into a new Title. Also the Lists of related Options are combined and labeled as Free Space. The Free space that is available on the disk at the end of the VTS Title VOBS or beyond the limits of the VTS, is not reflected in the TT_SPRT- Figure 5 illustrates an example of a finding of a PGCI Title. Within Figure 5 the following data structures are given: Title Play Back Character (TT_PB-TY). Title Part Number (PTT_Ns) VTS Title Number (VTS TTN), PGC_Number (PGCN), Program Number (PGN), VTS Title Number (VTS_TTN), Initial Address of the VTS Program Chain Information Table (VTS_PGCI-SA ). Table of Program Chain Information (PGCIT), Number of Angles (AGL-Ns), Parental_ID_field for Title (TT_PTL_ID-FLD), VTS Number (VTSN) and Parental Field ID (PTL_ID_FLD). Each title (Except for the last Title of the Options List and the last Complete Title) is linked to the next Title by a LigaPGCN instruction in the associated program Program Information (PGCI). The Program Chain information (PGCl) of the last Options List and the last Complete Title contains aSS Call for the Title Menu. If he Title is labeled as Free Space, this instruction is stored as a pre-command in the Program Chain Information (PGCI). Otherwise, the instruction is stored as a post-command. The number of Full Titles on a DVD-VR disc is equivalent to the number of Options List with a maximum of 49. The titles can be sub divided into a maximum of 99 chapters (Part_of_Titles). The maximum number of chapters for Full Titles on a disc is 254. Below the restrictions and modifications compared for the read-only format will be given. As already discussed when referring to Figure 1, exactly the Video Title Equip is recorded on a disc. Figure w illustrates the data structure of the General Video Manager Information (VMGI) in the Video Management area (VMG) as shown in figure 1. As in Figure 1, the Information of Presentation Control ( PCI) and Data Search Information (DSI) are not shown in Figure 2, although this information is scattered in the corresponding Navigation Packs (NV_PCK) in each Video Object Unit (VOBU) of the Video Object Team. for the Video Management Menu (VMGM_VOBS). With respect to the Video Management Information Management Table (VMGI_MAT), the first 8 bytes of the Unique Provider Identifier (PVRJD) contain the string 'DVD-VR01'. The first program chain execution (FP_PGC) contains just one SS Jump to the Title Menu as a pre-command. The Title Search Scoreboard (TT_SRPT) consists of two sections of equivalent length. The first half contains Pointers for Option Lists N and the second half contains Pointers for Full Titles N. The List of Options as well as the Full Titles are classified in ascending order of starting addresses for the first Cell used in the Object Team of Video (VOBS). All titles are Un_Secuencial_PGC_Titles for which ExecutionTime () and SearchTime () are blocked. Part_of_Title_Execution () and Part_of_Title Search () must be blocked for Titles that are associated with Free Space and should not be blocked for other titles. Table 1 lists the Playback Characters allowed as indicated by the Title_Playback_Character (TT_PB_TY) field. Table 1 Allowed Values of TT_PB_TY Value of TT_PB_TY Character of Title 0000 0101b Actual title that is not the last Option List or the last Full Title 0001 0101b Real Title that is the last Option List or the last Complete Title 0000 0111b Title of Space Free The Video Management Menu Program Unit Information Table (VMGM_PGCI_UT) is just linked to the Title Menu. There must be only one Language Unit. The Video Management Menu exists in this Language Unit. Following the Video Title Equipment Attribute Table (VTS_ATRT), the Video Management Menu Cell Address Table (VMGM_C_ADT) is restricted to a maximum of 170 cells and the Video Object Unit Address Map of Video Management Menu (VMGM_VOBU_ADMAP) to a maximum of 511 VOBUs. The remaining part of the Video Management area (VMG) is occupied with the Video Objective Video Management Video Team (VMGM_VOBS) and the Video Management Information backup (VMGI_BUP). With reference to Figure 3, the Video Title Equipment Information (VTSI) will be discussed. Just as the Root Menu contains just a false Program Chain (PGC) and other menus are not allowed, the Video Title Team Menu (VTS) have no associated Video Object data (VOB). Consequently, the Cell Address Table of the Video Title Equipment Menu (VTSM_C_ADT) and the Map of the Video Object Unit Address of the Video Title Equipment (VTSM_VOBU_ADMAO) do not exist. The Video Title Equipment Information Management Table (VTSSI_MAT) includes the following area (not shown in the figure): VTS Video Attributes (VTS_V_ATR) (MPEG-2 compliant video compression mode) Number of Audio Speakers (VTS_AST_Ns) describing the number of different current attributes of audio equipment used in this VTS). The VTS Audio Current Attribute Table listing the different current attribute equipment that are defined in this VTS. The PGCl for each Title defines which of the equipment is used at that moment. The number of Sub-movie Streams (VTSS_SPST_Ns) (equipped for one in this VTS) and The Attribute Table xle Substream VTS Stream (VTS_SPST_ATRT) (all fields in this table are zero). The Video Title Team (VTSI) information also includes a Video Title Team_Title_Picture_Tap Table (VTS_PTT_SRPT) in which the Title Units are recorded in the same order as the Titles in the Scoreboard. of Title Search (TT_SRPT). Below is a Table of Information of Chain of Program of Equipment of Title of Video (VTS_PGCIT). The Search Number of Video Title Equipment Program Information Pointers (VTS_PGCI) is the same as the number of Titles in the Title Search Pointer Table (TT_SRPT). Search pointers are recorded in the same order as the titles. All Program Chains (PGCs) are PGC Entries with all of the zero parts for Blocking Form, Blocking Character and Parental Identifier field (PTLJDFLD). When a list of options is equivalent to the associated Full Time, its Video Title Team Program Chain Information Start Address (VTS_PGCI_SA) values are identical. With respect to the Video Unit Equipment Menu Program Chain Unit Information Table (VTSM_PGCI_TU) the following is highlighted. The number of Language Units in the Video Title Team Menu as specified in VTSM__PGCI_UTI must be 1. There is exactly one Unit Search Language Unit Search Title Unit Video Title Pointer (VTSM_LUSRP). The Video Title Equipment Menu Existence field must contain the value (1000 0000b) to indicate that the Root Menu exists. The Video Title Team Menu Language Unit (VTSM_LU) contains just a Program Chain Information Search Pointer (VTSSM_PGCI_SRP). The Program Chain Category parameter of the Video Title Team Menu (VTSM_PGC_CAT) for the Video Title Team Menu Chain (VTSM_PGC) contains the value (8300 OOOOh) indicating that the associated PGC Program Chain ) is the PGC entry for the Root Menu. There is exactly one Program Chain Information of Video Title Team Menu (VTSM_PGCI). The Video Title Team Time Map table (VTS_TMAPT) contains Video Title Team Time Maps (VTS_TMAPs) that are presented for all Titles on the disk but do not contain any map entries. With respect to the Video Title Equipment Cell Address Table (VTS_C_ADT), the parameter containing the Video Object number in the Video Title Equipment (VTS_VOB_Ns) contains the contents of value '1 *. It is pointed out that the VTS_VOB__Ns does not reflect the current number of VOBs in the Video Object Team on a disk that can be rewritten. This is set to one as well as the Identifier number of all the VOBs is set to '1'. All Video Title Equipment Cell Part Information (VTS_CPi) has the same value ('1') for the Video Title Equipment Video Object Identifier number (VTS_VOB_IDN). Exactly 254 VTS_CPI blocks are recorded with VTS_CJDN starting from '1' and increasing up to '254 * including this last number. The Start Address and the End Address of the Cell Unit Part of the Video Title of Cell pieces that are not referred by any PGC of a Royal Title contain the value (0000 OOOOh). It should be noted that the Cell Pieces that are referred by a PGC of a Free Space Title contain zero start and end addresses. With respect to the Video Title Equipment Video Unit Unit Address Map (VTS_VOBU_ADMAP) it highlights that all the starting addresses of the Video Object Units (VOBU) of the VOBUs that are completely contained in VTSTT_VOBS are listed. here in ascending order. It should be noted that the VOBU start addresses that are part of the Free Space are also included in the VOBU VTS Address Map. Next to the structure of the Program Chain Information Area (PGCI) for the Title Program Chain will be given with reference to figure 5. This structure includes a General Program Chain Information Area (PGC_GI), a table of Program Chain Command (PGC_CMDT), a Cell Playback Information Table (C_PBlT) and a Cell Position Information Table (C_POSIT). With respect to the General Program Chain Information (PGC Gl) it is pointed out that exactly one of the Availability flags in the Program Chain Audio Stream Control table (PGC_AST_CTLT) is set in (1). When the Availability i th flag is set, the audio current parameter equipment i th defined for this Video Title Equipment (VTS) is valid for this Program Chain (PGC). The Audio Current Decoder number is always '0'. The feasibility flag of the first field Sub Stream Film Control Program Chain (PGC_SPST_CTL) in the Sub Movie Program Current Control Table (PGC_SPST_CTLT) is set to (1b). All other parts of the Sub Movie Program Current Control Board (PGC_SPST_CTLT) contain the value (0b). The program playback mode (PG) in the Program Chain Navigation Control (PGC_NV_CTL) is set to the sequential playback. The time value of Permanence is set to no Permanence. The PGC Command table (PGC-CMDT) contains exactly three commands. According to this version of the specification only one command is currently used (for Title League), the other two commands are NOP commands (0000 OOOOh). The command that is used for the Titles league is defined in table 2. Table 2 Commands in PGCl PGC associated with ... Contains ... As ... Real Time which is not the last List of Options nor the last Full Title in TT_SRPT LigaPGCN with PGC of the following title Real Post command Real Time which is the Last List of Options or the last Complete Title in TT_SRPT LlamaSS From the Menu of Title Post command Free Space Title Liga PGCN With PGC of the following Real Title Post command Regarding the Table of Information of Cell Playback (C_PBIT): Cells are not part of an Angle Block and there is no Interlaced Block. With regard to the table of Cell Position Information (C_POSIT): The identification numbers of the Video Objects of all the Cells in the PGC contain the value 'V. It is pointed out that, on DVD-VRs, all VOBs have the same VOBJDN. It is permissible that the Cell Identifier number in which a seamless playback banner equipment in Cell Palyback information is not the same as the previous Cell Identifier number increased by 1. With respect to the Information of Presentation Control (PCI) notes that modifying an Option list may require that a Cell be divided into two new Cells. In this case, all the values of the elapsed time of the cell (C_ELTM in PCI_GI) must be updated in all the PCI fields in the second cell. The additional data fields with respect to the DVD-Video format for read-only disks for Real-time current load attributes are given below. The last 32 bytes reserved for the General Information of the Presentation Control Information (PCI_GI) are redefined in this specification as shown in Table 3 Table 3 Redefinition of reserved fields at the end of PCM3I Contents Number of bytes Reserved Reserved 16 bytes (8) PCIJ3LXI PCI Extension Report 3I 1 byte (9) RT_V_ATR Video Attributes 1 byte (10) RT_AST_ATR Audio Stream Attributes 1 byte Reserved Reserved 13 bytes Total 32 bytes PCI_GI_XI identifies the application and specifies the length of the extension. If all the parts in this byte are zero, also the PCI_GI bytes that follow this field are zero: b7 b6 b5 b4 b3 b2 b1 bO The Application Identifier contains the value (0001b) if the stream attributes as defined in VTSI_MAT for this VTS must be overridden by the real-time stream attributes. Otherwise it contains the value (0000b) The real-time current attributes are valid from PTM Start to End PTM of the VOBU in which this field is contained. The length of the extension defines the number of bytes for this extension following this field. This must contain the value (0010b) if the Application Identifier is (0001b). This contains the value (0000b) if the Application Identifier is (0000b). RT_V_ATR describes the real-time Video stream attributes Aspect Rewind, movie letter box source and film camera have meanings as defined in the DVD specifications for read-only disk. RS_AST_ATR describes the real-time Audio comment attributes b7 b6 b5 b4 b3 b2 b1 bO The rodeo key as defined in the DVD specifications for read-only disk With regard to the Data Search Information (DSI) it should be noted that all VOBs are located in contiguous blocks and there are no angles. In relation to the General Information Information of Data Search (DSl_GI) It is pointed out that the Video Object Identifier number is always 1. In addition, it is not required that the Cell Identifier numbers be incremented monotonically by 1 in the Video Object. The following rules must be applied for the Cell Identifier: The cell identifier is identical in all the VOBUs belonging to the same cell. The Cells that are used by the Real Titles are only identified by their cell identifier. It should be noted that modifying a list of options may require that a cell be divided into two new cells. In this case, all the values of Elapsed Time of Cell (C_ELTM in DSI_GI) must be updated in all the DSI fields in the second Cell. With respect to the Video Objects it is to highlight an integral number of MPEG-2 Program Stream packets can be omitted from the start of the first VOB Cell, if the Cell is not used by any title. The last Cell of a VOB is a Buffer Cell. It should be noted that seamless connections between VOBs are excluded. Only one audio stream is allowed with a VOB. The audio stream decoder number is O '. Only one stream of Sub Movie is allowed with a VOB. The Sub Movie decoding current number is' 0 *. The data for the Sub Movie unit (SPU) is completely contained in a VOBU. The SPU validation period must not start before the VTMB start PTM, nor should it end after the final VTMB PTM. The DVD-Video format for discs that can be rewritten is not completely identical to the format of read-only discs. The differences are (1) in the rules for distribution and (2) in some details of the navigation data in the real-time data streams. The first class of differences usually has no consequences for DVD - Video users. As a consequence of the second kind of differences in some cases a trick-or-treat behavior of DVD-Video playback devices with rewrite discs may not always be exactly the same as the pre-recorded discs. Those who manufacture can improve compatibility between DVD - Video users and rewritable discs by following the guide given below. With respect to VOBS structures: On DVD-Video rewrite discs, some rules for video object equipment data structures are different for read-only disks. DVD-Video users can execute re-write discs again when they are strongly against: Non-sequential numbering of VOBs in VTSTT_VOBS Non-sequential numbering of Cells in a VOB The existence of remnants of Cells over written or other unused data between "active" cells. - Modified rules for Advanced Search Scorers as defined below: DVD-Video Recorders are required to at least fill in FWDI (n) forward pointers for n less than or equal to M. FWDI (n) forward pointers with M less than n less than or equal to N contains the last correct value. For n greater than N Pointers forward pointing towards the end of the Ordinary Cell. The duration of a cell on a rewrite disk is typically 60 seconds. This means that for forward-looking functionality, DVD-Video users can continue to rely on pointers for the lowest speeds (2x, 4x, (x).) For high speeds, the user can continue to use FWDI long-distance pointers. but in this case they point to the end of the ordinary cell If a faster and more accurate search is desired, the speed can be adjusted by picking up intermediate films (eg by applying the FWDI Pointer (6)) or by adapting the deployment period of Fig. 7 shows the recording apparatus according to a first embodiment of the invention The recording apparatus is composed of several units One unit is the AV input unit 1. The A / V input of unit 1 receives signals of image and sound in the antenna input terminal 2 and external nest and image in the input terminal 3. The antenna input terminal 2 is adapted to receive emission signals. Modulated A V transmitted by satellite or by terrestrial or cable source. The external sound / image input terminal 3 is adapted to receive an unmodulated audio signal or unmodulated video signals generated directly by an audio or video source respectively. The figure or illustrates the A / V input unit 1 in more detail. A tuner 5 which is connected to the antenna terminal 2, demodulates the modulated antenna signals A V and outputs the demodulated signals to a demultiplexer unit A V suitable for separating audio signals from the video signals. An A / D audio converter unit 7 outputs a digital audio signal and an NTSC / PAIJSECAM decoding unit 8, including an A / D video converter, outputting a digital video V signal. These signals A and V are output to a coding / decoding unit 9 by compressing and coding the signals A and V respectively by an audio encoder 10 and a video encoder 11., converting them into a multiplexed and compressed stream according to the Video Recording specifications using a multiplexer 12. For these purposes, the audio encoder 10 and the video encoder 11 are adapters to carry out a source compression according to a standard. specific for compression such as MPEG-2 for audio and video. The compressed and multiplexed current is subjected by means of a rail buffer 13 which absorbs fluctuation rates produced by an intermittent recording and a data reproduction of a disk, towards the drive unit 14. The decoding coding unit 9 also expands a current compressed read from a recording medium by the drive unit 14 and separately outputs an audio signal A and a video signal V to the transmission unit AA 15. For this purpose the decoding coding unit 9 includes an AV decoder 16 suitable for decode the compressed audio and video source signals. The emission unit 15 A / V, which is illustrated in more detail in Figure 10, includes an audio D / A converter 17, for emission of sound signals to an external sound output terminal 18. The emission unit TO? 15 further includes a video converter unit -D / A 19 video encoder emitting video signals to an external image output terminal 20. FIG. 11 illustrates the drive unit 14 in more detail. This unit 14 receives the compressed current generated by the coding / decoding unit 9 and adds an error-correction code by an error correction processing unit 21 to the current. Then a channel modulation / demodulation unit 22 converts the current with an error-correction code to channel parts adapted to record in a correction means 23. In case of a DVD-disc the modulation scheme EFM + is being applied. The recording and reading in the case of an optical recording medium 23 are carried out by a laser compressor in an optical head unit 25. A laser power control unit 24 is controlling the laser The reflected signals of a medium of engraving 23 is being converted by an amplifier and an equalizer circuit in the form of wave 26 into two-value signals. The resulting compressed current is further demodulated by the demodulation modulation unit 22, corrected for errors by the error correction processing unit 21 and output to the decoding coding unit 9 by means of a rail buffer 13. A servo circuit 27 , connected to the amplifier and the waveform equalizer circuit 26, controls the positioning of the optical head unit 25 relative to the recording medium 23 and the rotational speed of the recording medium 23 controlled by the rotational conduction means 28. A system control unit 29, as shown in Figure 12, controls each block and performs file control, control information management and rail buffer control. For this purpose a control system unit 30 is provided and has been connected to the memory means 31 loaded with a suitable operating system. The operator input means 32 and the operator output means 33 are connected to the memory means 31. The input means 32 comprises for example key means and the operator output means includes deployment means. However, the invention has been described with reference to the preferred attachments thereof, it is understood that these are not limiting examples. Various modifications of the same may have been evident for those with skill in the matter without leaving the scope of the invention as defined by the rights. The invention can be implemented both by hardware and software means, and various "means" can be represented by the same hardware article. Furthermore, the invention rests on each and every one of the new features or the combination thereof. It also highlights that the word 'including' does not exclude the presence of other elements or steps than those listed in the right. Any reference sign does not limit the scope of rights. LIST OF REFERENCE DOCUMENTS (DI) European Patent Application EP 724264 (D2) US patent 5 784 528 (D3) ISO / IEC 138-18-1: 1995 Information Technology - Generic Coding of moving pictures and associated audio ipformation: Part 1: Systems (MPEG2- systems ) RIGHTS

1. A method of recording a coded bit stream, said bit stream represents a plurality of video objects including a sequence of cells that together constitute a part of an MPEG2 Program Stream, on a disk as a record carrier, such as an optical disk, said method includes: the recording video objects include a sequence of contiguously recorded cells, each cell comprising a unique cell identification number within a video object; the cell recording playback sequence defining an executable program chain of cells, wherein said sequence includes references to the identification numbers of the cell. the engraving navigation data within said cells including the aforementioned cell identification numbers, characterized by, dividing at least one cell previously recorded in new cells and / or overwriting at least one cell previously recorded at least partially with a new cell, assigning at least one new cell with a cell identification number, recording a new cell playback sequence using at least one new cell, the new playback sequence does not necessarily employ an ascending number of identification numbers of cells. A method according to the right 1, characterized by, assigning all the video objects the same video object identification number. A method according to law 2, wherein said assignment of new cells with cell identification numbers includes the updating of navigation data within the new cells. A method according to law 3, wherein said update includes the update of cell elapsed time and the identification number of the cell. A method according to law 4, in which a cell, video object, playback sequence, cell identification number, navigation data correspond respectively to a Cell, Video Object (VOB), a Program Chain ( PGC), a Cell Identifier number and a Navigation Package (NV_PCK) of the DVD Read Only Video Request. A recording apparatus for recording a coded bit stream, representing a plurality of video objects including a sequence of cells together constituting a part of an MPEG2 Program Stream, on a disk as a recording carrier such as an optical disk, the The recording apparatus includes a recording medium adapted to record. A sequence of contiguously recorded cells, each cell includes a unique cell identification number within a video object, a cell playback sequence defining an executable cell program string, wherein said sequence includes references of the numbers of cell identification, navigation data within said cells including the identified cell identification numbers, characterized thereby the recording apparatus induces control system means adapted to control the recording media To divide at least one cell previously recorded in new cells and / or to overwrite at least one cell previously recorded at least partially with a new cell. To assign at least one new cell with a cell identification number To record a new cell playback sequence using at least one new cell, the new playback sequence does not necessarily employ an ascending numeration of cell identification numbers . A recording device according to right 6, characterized by control system means adapted to assign all video objects the same video object identification number. A recording device according to the right 7, characterized by control system means adapted to update the navigational data within the new cells. A recording apparatus according to the right 8, characterized by means of control system adapted to update the elapsed time of the cell and the identification number of the cell. A recorder apparatus according to the right 9, within the cell, video object a playback sequence a cell identification number, navigation data corresponding respectively to a Cell, a Video Object (VOB), a Chain of Program (PGC), a Cell ID number u and a Navigation Package (NV_PCK) of the DVD Read Only Video Specification.