JP4197163B2 - Data processing device - Google Patents

Description

  The present invention relates to a data processing apparatus, and more particularly to a data processing apparatus that performs data processing such as recording, reproduction, and editing for encoded data obtained by encoding content such as still images, moving images, music, and audio. is there.

  2. Description of the Related Art Conventionally, writable / rewritable optical discs such as DVD-RW and DVD-RAM have been developed as media for recording, reproducing, and editing data on a recording medium. In such a disc, there has been a demand for a function that allows a user to easily edit (delete, insert, newly create content, etc.). At present, recording / reproducing apparatuses that are for home use and can be easily handled by users for editing and the like are becoming widespread.

  Up to now, editing by the user can be performed only in units of files, and there has been a problem that an area deleted by editing or the like cannot be effectively used. On the other hand, a technique called a cell division processing method is disclosed in which editing can be easily performed and fine editing can be performed, and management of data after editing is particularly possible.

  For example, the technique disclosed in Patent Document 1 manages a set of reproducible cells on the premise that video stream data (encoded data of video content) is recorded and managed, and plays back VOBs including the cells. Content playback is controlled by specifying a program chain that manages the content.

In the invention described in Patent Document 1, when deleting (erasing) content by editing, an erasure level is set, and data that is given this erasure level is not reproduced at the time of reproduction, so that it appears as if it has been apparently erased. ing. The cells for which the erase level is set are managed by a list. Further, by clearing the erase level of the cells registered in this list, it is possible to return to the state before the editing process such as deletion.
Japanese Patent No. 3356773

  However, in the method as described above, area management (editing method) is performed in units of playback of video streams, and data having different characteristics (for example, video content and audio content, or high-resolution video content and low-resolution). In a situation where different types of content (such as video content) are mixed, it has not been assumed that free space management is performed flexibly. When such flexible area management is performed by an application that reproduces edited content, there is a problem that the configuration of the application becomes complicated and the processing speed of the entire system decreases.

  Also, in general, it is not assumed that deleted data is mutually used between data with different characteristics as described above, and free space is efficiently used when adding content or creating new content. There was a problem that it could not be used.

  The present invention has been made in view of the above circumstances, and by managing the recording area of a recording medium on which content is recorded in a plurality of management units (areas), it is possible to perform partial deletion or deletion cancellation of content. Control the editing process and enable efficient management of recording areas when content of different types (characteristics) exists.

  In addition, the configuration of an application for recording and reproducing data is simplified, and an area to be deleted or an area in use by content is assigned to a new content area based on a predetermined priority order, It was made for the purpose.

In order to solve the above problems, the first technical means includes an editing control unit that controls editing processing of content data recorded on a recording medium, and a recording area of the recording medium is divided into a plurality of management units and managed. When a plurality of content data of different types are recorded on the recording medium, the amount of data that can be allocated to a management unit to be managed by the management unit is the editing unit. The amount of data is smaller than the unit data amount of at least one type of content data that can be edited by the control unit, and when the part of the content data is targeted for deletion by the editing control unit, the management unit enabling the write state corresponding management units, and the location information on the recording medium in accordance with the management unit, a portion of the content data subject to deletion Also it comprises means for retaining after, according to the position information the holding is obtained by and allocates the management unit to add data or new content data of the content data.

According to a second technical means, in the first technical means, the management unit cancels a deletion process of a part of the content data to be deleted by the editing control unit, and corresponds to the data for which the deletion process has been canceled. This is characterized in that the management unit is returned to a writable state.

According to a third technical means, in the first technical means, when the management unit cannot acquire the management unit in the writable state, the management unit assigned to the content data is set in the writable state, and the management unit is assigned to the management unit. The position information on the corresponding recording medium is held.

  Since the recording area of the recording medium on which the content is recorded can be managed by a plurality of management units (areas), the deletion target data itself is moved to another area or copied, etc. Therefore, it is possible to easily control editing processing such as partial deletion and deletion cancellation of content, and it is possible to efficiently manage recording areas when content of different types (characteristics) exists.

  In addition, since the configuration of an application for recording and reproducing data can be simplified, an area to be deleted or an area in use by content can be allocated as a new content area based on a predetermined priority order. The content area can be repeatedly used when adding data to content or generating new content.

  FIG. 1 is a block diagram showing a configuration example of a data processing apparatus according to an embodiment of the present invention. In the figure, 10 is a data processing apparatus, and the data processing apparatus 10 includes an audio input unit 11 and a video input unit 12. , Input switching unit 13, output switching unit 14, video display unit 15, audio output unit 16, encoding unit 17, decoding unit 18, main control unit 19, user input device 20, recording control unit 21, reproduction control unit 22, An editing control unit 23, an area management unit 24, a device control unit 25, and a hard disk (HD) 26 are provided.

  The audio input unit 11 inputs an audio signal including voice and music, and the video input unit 12 inputs a video signal including a still image and a moving image. In the input switching unit 13, the audio signal and the video signal are switched based on the control signal from the main control unit 19, and either signal is input to the output switching unit 14 and the encoding unit 17.

  The output switching unit 14 switches the audio signal or the video signal from the input switching unit 13 or the decoding unit 18 based on the control signal from the main control unit 19. As a result of switching, in the case of a video signal, the respective signals are input to the video display unit 15 such as a cathode ray tube or a liquid crystal display device, and in the case of an audio signal, the respective signals are input to the audio output unit 16 such as a speaker and headphones.

  The encoding unit 17 encodes the input video signal or audio signal by a method suitable for each signal. As a video signal encoding method, for example, a JPEG still image encoding method, MPEG2 video encoding, An international standard system for moving picture encoding such as H.263 is preferably used. As an audio signal encoding system, for example, MPEG1 audio encoding, an international standard system for audio encoding such as G series of ITU-T recommendation, etc. Are preferably used. Alternatively, a moving image may be encoded using Windows® Media Video, Real Video, and audio using Dolby AC3. In the decoding unit 18, the encoded data is decoded by a decoding method corresponding to the encoding method used in the encoding unit 17.

The recording control unit 21 controls the process of inputting the encoded data to the area management unit 24 when recording the encoded data, and the reproduction control unit 22 encodes the encoded data when reproducing the encoded data. A process of reading data from the area management unit 24 is controlled.
The editing control unit 23 controls editing processing requested by the user via the user input device 20 such as a remote controller, including content deletion, content addition, and new content creation.

  The area management unit 24 manages content data recording areas by a method described later. For example, according to a control signal from the recording control unit 21, the input encoded data is set as a new content and a recording area corresponding to the content is allocated. Further, in accordance with the control signal from the reproduction control unit 22, the content corresponding to the encoded data requested to be read and the recording area allocated to the content are specified, the encoded data is read from the hard disk 26, and the reproduction control unit 22 is read out. To enter. At this time, instead of the hard disk 26, another recording medium such as a DVD or a memory card may be applied.

  The device control unit 25 controls writing of data to the hard disk 26 and reading of data from the hard disk 26, respectively. In the data processing apparatus 10 according to the present embodiment, when a part of content recorded on the hard disk 26 is deleted by the area management unit 24, the deletion processing can be easily canceled, the deletion area can be assigned to new content, and the like. It is possible to do.

  FIG. 2 is a diagram for explaining the relationship between the video content and the use area in the hard disk 26 on which the video content is recorded. In FIG. 2, reference numerals 31, 32, and 33 denote the video stream of the content A (in this example, moving image content). This is an editable unit of (encoded data obtained by encoding video content). For example, the encoded data of MPEG2 encodes each frame included in the video content, and is an intraframe encoded frame (I frame) that can be decoded independently, and predictive encoding with prediction from a previously decoded frame. The frame (P frame) is included. However, in order to simplify the description, it is assumed that there is no bi-directional predictive encoded frame (B frame) with prediction from past and future frames.

  An editable unit in a video stream is a unit that starts with an I frame and generally includes a plurality of frames. FIG. 2 schematically shows this. In the MPEG2 standard, such a unit is called a GOP (Group of Pictures). Therefore, the editable unit in FIG. 2 is hereinafter referred to as “GOP31”. In addition, the arrow which shows "time" shown in FIG. 2 shows the order of display time of GOP.

  The use area shown in FIG. 2 indicates a recording area on the hard disk 26, and symbols such as a, b, c,... Are attached to the recording area divided into small units. These units (hereinafter, each unit is referred to as an area) are not necessarily continuous areas on the hard disk 26 but may be skipped.

In FIG. 2, GOP 31 is recorded in areas a, b, c, and d, and GOP 32 is recorded in areas d, e, f, g, and h. At this time, GOP31 data is recorded in the first half of the area d, and GOP32 data is recorded in the second half of the area d.
In the present invention, the use area to which the recording area in which the content is recorded as described above is allocated is managed by the area management unit 24 shown in FIG.

  FIG. 3 is a block diagram showing a configuration example of the area management unit 24 shown in FIG. 1. The area management unit 24 includes an area table 24a, a content area table 24b, a free area management table 24c, and a management processing unit 24d. Yes. The configuration example of each table is shown in FIGS. 4 to 7 below, and will be described in detail.

FIG. 4 is a diagram illustrating a configuration example of the area table 24a illustrated in FIG.
The area table 24a is a table for managing the relationship between the area number assigned to each area (area unit) assigned to the recording area on the hard disk 26 and the status (state) of each unit. In this example, numbers from 0 to N are assigned as area numbers, and area numbers indicated by symbols a to z are attached in the middle of 0 to N. When the status is “free”, it indicates that valid data is not written in the area. Further, when the status is busy, it means that valid data has been written, so that new data cannot be written to the area.

FIG. 5 is a diagram showing a configuration example of the content area table 24b shown in FIG.
The content area table 24b is a table indicating which area on the hard disk 26 is used by encoded data (video stream or audio stream) of recorded content. The area management numbers shown in FIG. 5A are numbers such as 0, 1, 2,... From the top of the content, and in this example, symbols n-4 to n + 6 are added in the middle. is doing. Area numbers a to k indicate the area numbers of the use areas of the video stream described with reference to FIG. In this example, for example, the data corresponding to the area management number n of the content A is assigned to the area number e.

FIG. 6 is a diagram showing another configuration example of the content area table 24b shown in FIG.
The content B corresponding to the content area table 24b ′ shown in FIG. 6A is content having a different type (characteristic) from the content A shown in FIG. 5A, and is encoded data compared to the content A. Assume that the content is small. For example, audio data or video data having a lower resolution than the content A is assumed. In this example, the encoded data of content B is recorded in seven areas from area management numbers 0 to 6, and area numbers from m to s are assigned in reverse order to the area management numbers. As described above, the area number may be assigned by a method that is not in the order of the number from the top of the content.

Next, FIGS. 5B and 6B show a content area table 24b when editing is performed so that a part of the content shown in FIGS. 5A and 6A is deleted. (24b ') shows how it is changed.
FIG. 5B shows an example in which the GOP 32 of the content A shown in FIG. D_AS shown in FIG. 2 indicates the boundary between GOP31 and GOP32 on the video stream, and D_AE indicates the boundary between GOP32 and GOP33 on the video stream. In this video stream, when the section D_AS to D_AE is deleted (that is, GOP 32 is deleted), information about the data of the areas e, f, and g in the use area is registered in the free area management table 24c described later. At this time, in the content area table 24b, as shown in FIG. 5B, the numbers corresponding to the area numbers e, f, and g are rewritten to “−1”, and the portion is deleted from the content A.

  Similarly, in the content area table 24b ′ shown in FIG. 6A, when editing is performed so that the portions corresponding to the area management numbers 2 to 6 of the encoded data of the content B are deleted, the content shown in FIG. As shown, the numbers corresponding to the area numbers m to q are rewritten to “−1”, and information related to the part to be deleted is registered in the free area management table 24c.

FIG. 7 is a diagram showing a configuration example of the free area management table 24c shown in FIG.
The free area management table 24c shown in this example is a table for managing information related to data to be deleted from content. The free area management number in this example is obtained by adding a serial number starting from 0 to information managed by the free area management table 24c.

  In FIG. 7, the content ID is information indicating to which content the data to be deleted originally belonged. In this example, the information related to the data to be deleted from the content B shown in FIG. 6 in the free area management number 0 is the information related to the data to be deleted from the content A shown in FIG. Is recorded. The content ID may be expressed as character data or may be expressed as a serial number for the content.

  The status is information indicating whether or not the data to be deleted can be restored. Immediately after the processing for deleting content, the status becomes “recoverable”, indicating that the data to be deleted can be recovered. On the other hand, as described later, when a part of data to be deleted is used for recording other contents (that is, overwritten), the above status becomes “unrestorable”, and the data to be deleted is Indicates that it cannot be restored. Information indicating this status can be expressed by a flag of 0, 1 or the like.

  The deletion range is information indicating which part of the encoded data of the original content corresponds to the deletion target data. For example, for content A, the start point and end point (D_AS and D_AE) of GOP 32 shown in FIG. 2 are recorded. For content B, similarly, a deletion start point (D_BS) and a deletion end point (D_BE) are recorded. This deletion range can be expressed using, for example, the data length (for example, byte length) from the beginning of the content and the reproduction time.

The number of areas is information indicating how many areas the data to be deleted corresponds to. In this example, five areas for content B and three areas for content A are targeted for deletion. The area list is information indicating a list of areas of data to be deleted. In this example, area numbers m to q are registered in the area list for content B, and area numbers e, f, and g are registered in the area list for content A.
The management processing unit 24d shown in FIG. 3 updates the area table 24a, the content area table 24b (24b ′), and the free area management table 24c when content deletion processing, new content generation processing, and the like are performed. Manage.

  In the first embodiment of the present invention configured as described above, each processing of partial deletion of content, restoration of partially deleted data, addition of data to content, and generation of new content will be described below.

  The content partial deletion processing has been described with reference to FIGS. 2, 5, 6 and 7. That is, in the content area table 24b (24b ′), the area number including only the portion to be deleted is rewritten to “−1”, and the free area management table 24c is updated accordingly. At this time, additional information such as a content ID, a status, a deletion range, the number of areas, and an area list is held in the free area management table 24c. Among these, the area list is data that is to be deleted (this deletion may be referred to as “release” in the following because the corresponding area can be used by other contents by making this deletion target). This is information indicating the corresponding position on the hard disk 26, and can be considered as position information of an open area. The information on the deletion range can also be said to be position information indicating which position on the content has been deleted.

  Next, when restoring data targeted for partial deletion, it is first confirmed that the status of the free area management table 24c is “recoverable”. For example, when the area of the free area management number 1 shown in FIG. 7 is restored, the management processing unit 24d of the area management unit 24 stores the data of the area numbers e, f, and g from the additional information of the free area management table 24c. It is determined that the data is in the range of content A (D_AS to D_AE). Next, the above-described area numbers e, f, and g are respectively written in the area having the area number “−1” in the content area table 24b shown in FIG. 5B, and the free area management shown in FIG. Delete the entry number 1. As a result, the content area table 24b of the content A is restored to the state shown in FIG. 5A, and the portion indicated as “deleted” in FIG. 2 returns to the state before deletion.

  According to the present invention, it is possible to easily delete and restore data without performing data evacuation processing such as moving or copying the data to be deleted to another area. .

Next, the addition of data to content will be described.
Assume that the content B described in FIG. 6B is audio data, and the recording area becomes insufficient when data for two areas is added as audio data by recording or the like (that is, the status of the area table 24a) Are all busy). At this time, the area management unit 24 shown in FIG. 1 refers to the free area management table 24c, and recognizes the area that is to be deleted from the content B and the area that is to be deleted from the content A as usable areas. . There are several methods for using which area to add data for two areas. For example, (1) a method of using free area management numbers in order, (2) a method of giving priority to the number of areas as close as possible to the number of additional areas, and (3) content to be deleted from content to be added (content B in this example). If there is another area, a method of giving priority to it can be considered.

  As areas for adding data for two areas, the area of the free area management number 0 is selected in the cases (1) and (3), and the area of the free area management number 1 is selected in the case of (2). When the area with the free area management number 0 is selected, for example, two areas of p and q in the area list shown in FIG. 7 are used for adding audio data. As described above, when a part of the area list is used for new data, the rest of the area list cannot be used for restoring the data to be deleted, so the status of the free area management number 0 is changed to “unrecoverable”. Is done. In the area list, three areas m, n, and o are left as open areas. At the same time, area management numbers 7 and 8 are added to the content area table 24b ′ shown in FIG. 6B, and p and q are written as the corresponding area numbers.

  As another embodiment of adding data to content, consider a case where video data is added to content A for six areas. Here, it is assumed that only three areas can be used as recording areas, and the remaining three areas use the areas managed by the free area management table 24c. In this case, as the first three areas, the three areas whose status on the area table 24a is “free” are selected. Assume that the selected area numbers are x, y, z. Assume that the remaining three areas are selected by the method (3) from the free area management table 24c shown in FIG. In this case, three areas (e, f, g) registered in the free area management number 1 are selected. That is, since all three registered areas are used as additional areas, the entry itself of the free area management number 1 is deleted from the free area management table 24c. At the same time, six entries are added to the area management number of the content area table 24b shown in FIG. 5B, and x, y, z and e, f, g are written as the corresponding area numbers.

  In this way, the area to be deleted (that is, the released area) can be easily reused when adding data to the content. In the above example, the content area table 24b (24b ′) has an entry whose area number is “−1” as the deletion history. However, when data addition and deletion are repeated, this entry increases. The size of the content area table 24b (24b ′) becomes large. In order to suppress this, the content area table 24b (24b ′) may be refreshed. That is, for areas that have been registered in the free area management table 24c as a deletion target and have been used for addition of contents (for example, the areas e, f, and g described above), the contents area table 24b. The entry itself of (24b ′) may be deleted to reduce the table size. Also, in content data where the offset position from the top of the data is important, insert a special entry to hold the area number information for the deleted entry so that the original offset position can be obtained. Also good.

  Next, as an example of generating new content, consider the case of generating content C (7 areas in this example). Here, it is assumed that the statuses of the area table 24a are all busy. As described above, there are various methods for preferential use of the areas registered in the free area management table 24c shown in FIG. Here, it is assumed that 5 areas (m to q) of free area management number 0 and 2 areas (e, f) of free area management number 1 are selected. In this case, all the five areas registered in the free area management number 0 are used, so this entry is deleted. Further, since two areas of the free area management number 1 are used, the status is changed to “unrecoverable”. As an open area, only the area number g remains in the area list of the free area management number 1. On the other hand, a content area table for content C is newly created, and m to q and e, f are assigned as area numbers.

  According to the present invention, even in an area that is a deletion target from data having different characteristics (types) in the generation of new content, it can be used for allocation without distinction, so that data allocation is efficient. It becomes possible to carry out.

  In the first embodiment described above, when the status of the area table 24a is all busy, it is assumed that there is no recording area that can be used, and the open area registered in the free area management table 24c is searched. If no area is registered, it is necessary to delete a part of the recorded content and use it as a new (empty) area. Various methods can be considered as to which content among the recorded content is to be preferentially deleted. For example, a method of assigning such priorities to the content file itself and making it the deletion target in that order, a method of making the deletion object in order of the recorded time, and a method of making the deletion object in the order of low user access frequency Etc.

  Similarly, there are various prioritization methods for preferentially deleting which part of the content to be deleted. In the present invention, the area management number of the content area table 24b (24b ') is used for such prioritization, and the area is deleted from the largest area management number (that is, from the back of the content). be able to. In addition to this, when the content is viewed halfway and stopped, a reproduction start position called normal resume information is recorded, so such additional information may be used. That is, data before the reproduction start position is preferentially deleted and used for recording new data.

  According to the present invention, an area to which content data has been allocated can be released according to priority order and used for recording new data.

Next, a second embodiment according to the present invention will be described.
In the present embodiment, a description will be given of the reproduction control unit 22 that reads out encoded data of content to be partially deleted and generates data to be input to the decoding unit 18.

  FIG. 8 is a block diagram showing a configuration example of the reproduction control unit 22 shown in FIG. 1, and the reproduction control unit 22 includes a reading unit 22a, a padding data generation unit 22b, and a padding data insertion unit 22c.

  The reading unit 22a reads encoded data for reproduction from the area management unit 24 illustrated in FIG. For example, as shown in FIG. 2, when reproducing the content A that is the target of partial deletion, the reading unit 22a sequentially reads the data of the area numbers a, b, c, d, h, i, j, and k. . This is realized by the area management unit 24 outputting the encoded data while referring to the content area table 24b. For example, referring to the content area table 24b shown in FIG. 5B, the area management numbers n-4 to n-1 of the content A correspond to the area numbers a, b, c, and d. It can be seen that the data for each area may be output. Next, the area management numbers n to n + 2 are not subjected to data output because the area number is “−1” and it can be seen that they are targeted for partial deletion. Further, since the area management numbers n + 3 and later correspond to the area numbers h and later, the data of each area is output. In this way, the data of the area numbers a to k described above are read out.

  The padding data generation unit 22b is a part that generates padding data that can be discarded by the decoding unit 18 shown in FIG. For example, a null packet defined in a TS packet used in the MPEG2 system standard is generated as padding data. As padding data, stuffing data used in the MPEG4 video standard may be used.

  The padding data insertion unit 22c inserts the padding data into the encoded data by replacing the data read by the reading unit 22a with data that may include the data to be deleted. For example, in FIG. 2, since GOP 32 is a deletion target, the encoded data of GOP 32 included in area numbers d and h is replaced with padding data.

  The area management unit 24 shown in FIG. 1 refers to the content area table 24b and notifies the reproduction control unit 22 of the reference result that the area numbers d and h may include data to be deleted. This is possible. That is, in the content area table 24b shown in FIG. 5B, the area numbers d and h can be specified as areas close to the area whose area number is “−1”. The area management unit 24 notifies the reproduction control unit 22 of these area numbers as areas that may include the data to be deleted.

  Similar processing can also be performed in the reading unit 22a. That is, when the encoded data is received from the area management unit 24, since the data transfer is temporarily interrupted in the section targeted for partial deletion, the area number d immediately before the interruption and the area number h immediately after the interruption are deleted. Identified as an area that may contain the targeted data.

  The padding data insertion unit 22c determines the boundary between the data to be deleted and the data to be reproduced for the area that may contain the data to be deleted, and inserts the padding data. For example, with respect to the data of area number d shown in FIG. 2, there is GOP31 encoded data (data to be reproduced) in the first half and GOP32 encoded data (data to be deleted) in the second half. In this case, the boundary between both can be easily determined by identifying the start code of the first I frame of GOP32. Similarly, in the data of area number h shown in FIG. 2, the start code of the first I frame of GOP 33 is identified. However, in order to be able to make such a determination, the amount of data that can be managed in one area is smaller than the encoded data amount of one GOP, and two or more GOP boundaries are not included in one area. It is necessary. In the present invention, this condition is satisfied because the data size manageable by the area is set smaller than the data amount of the GOP.

FIG. 9 is a diagram illustrating an example of input data to the decoding unit 18 generated by the reproduction control unit 22 of the present embodiment.
The input data in the present embodiment indicates portions corresponding to the area numbers c, d, h, i shown in FIG. 2, and padding data is inserted into part of the data of the area numbers d and h. Since the decoding unit 18 skips the padding data and continues the decoding process, compared with the case where the padding data is not used, extra data (that is, data in the latter half of the area number d and data in the first half of the area number h). ), It is not necessary to perform the decoding process, and it can be processed at high speed.

  According to the present invention, when reproducing encoded data including encoded data that is subject to partial deletion, it is possible to easily generate encoded data that can be reproduced without changing the configuration of the decoding unit, and The encoded data can be processed at high speed.

It is a block diagram which shows the structural example of the data processor which concerns on one Embodiment of this invention. It is a figure for demonstrating the relationship between a video content and the use area in the hard disk which recorded it. It is a block diagram which shows the structural example of the area management part shown in FIG. It is a figure which shows the structural example of the area table shown in FIG. It is a figure which shows the structural example of the content area table shown in FIG. It is a figure which shows the other structural example of the content area table shown in FIG. It is a figure which shows the structural example of the free area management table shown in FIG. FIG. 2 is a block diagram illustrating a configuration example of a reproduction control unit illustrated in FIG. 1. It is a figure which shows an example of the input data to the decoding part produced | generated by the reproduction | regeneration control part of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Data processing apparatus, 11 ... Audio | voice input part, 12 ... Image | video input part, 13 ... Input switching part, 14 ... Output switching part, 15 ... Video display part, 16 ... Audio | voice output part, 17 ... Encoding part, 18 ... Decoding unit, 19 ... main control unit, 20 ... user input device, 21 ... recording control unit, 22 ... playback control unit, 22a ... reading unit, 22b ... padding data generation unit, 22c ... padding data insertion unit, 23 ... editing control 24, area management unit, 24 a, area table, 24 b, 24 ′, content area table, 24 c, free area management table, 24 d, management processing unit, 25, device control unit, 26, hard disk, 31, 32, 33 ... GOP.

Claims (3)

A data processing apparatus comprising: an editing control unit that controls editing processing of content data recorded on a recording medium; and a management unit that divides and manages a recording area of the recording medium into a plurality of management units.
When a plurality of content data of different types are recorded on the recording medium, the amount of data that can be allocated to a management unit to be managed by the management unit is at least one type of content that can be edited by the editing control unit Smaller than the unit data amount of data,
The management unit sets a management unit corresponding to the deletion target data in a writable state when a part of the content data is set as a deletion target by the editing control unit, and stores the management unit on the recording medium corresponding to the management unit. Means for holding the position information after the part of the content data is to be deleted,
A data processing apparatus , wherein the management unit is assigned to additional data or new content data of the content data according to the stored position information .   The data processing apparatus according to claim 1, wherein the management unit cancels a deletion process of a part of content data to be deleted by the editing control unit, and selects a management unit corresponding to the data for which the deletion process has been canceled. A data processing device, wherein the data processing device is returned to a writable state. 2. The data processing apparatus according to claim 1, wherein when the management unit cannot acquire the management unit in the writable state, the management unit assigned to the content data is set in a writable state, and the management unit corresponding to the management unit is set. A data processing apparatus that holds position information on a recording medium .

Images