JP4421129B2 - Data acquisition device, data storage device and method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique for recording data associated with data stored in a recording medium, and more particularly to a technique for reducing the amount of data in the recording medium.
[0002]
[Prior art]
Conventionally, when editing video and audio recorded by a VTR camera or the like, the recorded video data and audio data is temporarily stored from a video tape or the like in a recording medium such as a hard disk or a DVD that is randomly accessible in a computer. A method of editing these data by various applications is common.
[0003]
Hereinafter, a conventional editing method for video data and audio data will be described using a personal computer as an example.
A personal computer that edits data roughly grasps from the viewpoint of data editing, an interface unit that receives video data and audio data from the outside, a recording unit that includes a hard disk or the like for storing video data and audio data, Acquired by a data storage unit for storing video data and audio data captured from the interface in a recording unit, a data acquisition unit for acquiring data to be reproduced such as video data and audio data from the recording unit, and a data acquisition unit A CRT that displays in accordance with the video data that has been output, and a speaker that outputs in accordance with the audio data acquired by the data acquisition unit.
[0004]
First, the operation of each unit when recording video data and audio data will be described.
The interface unit receives video data and audio data from the outside and outputs them to the data storage unit.
When the data storage unit receives the video data and the audio data, the data storage unit performs A / D conversion on the data, and a 4-digit number common to both data indicating that the data is the same group, for example, “0002”, Characters indicating whether the data attribute is video or audio, that is, “MOV” for video, and “PATH”, which is a unique path name including a file name consisting of characters “AUD” for audio. ”And“ AUD0002 ”are assigned to video data and audio data, stored in the recording unit, and associated with the management file“ LIST_MGR ”placed in the directory“ MGR_INFO ”in the recording unit. And register.
[0005]
In the management file “LIST_MGR”, index data of data stored in the recording unit is stored, and the index data indicates correspondence information to each data generated by data editing.
Next, the operation of each part in normal playback will be described.
The data acquisition unit acquires a path name of data to be reproduced from the management file “LIST_MGR”, for example, a path name including “MOV0002” and “AUD0002”, and video data associated with these path names and Audio data is acquired, D / A conversion is performed, video data is output to a CRT, and audio data is output to a speaker in parallel.
[0006]
The CRT and the speaker respectively receive video data and audio data from the data acquisition unit, display video according to these data, and output audio.
Next, the operation of each unit in data editing will be described.
Here, as a specific example of data editing, a description will be given of so-called post-recording editing in which audio that has been captured together with video and stored in a recording unit is replaced with audio recorded later, such as narration or BGM.
[0007]
The data storage unit receives voice data such as narration or BGM used for post-recording editing from the interface unit, A / D converts the voice data, and a 4-digit number, for example, “0006”, and the data attribute is voice. Is stored in the recording unit in association with a unique path name including the file name “AUD0006” consisting of the characters “AUD” indicating that the The post-record path name registered in the management file “LIST_MGR” is registered in association with the path name indicating the video data and audio data on the side on which post-record editing is performed.
[0008]
The data acquisition unit refers to the index data in the management file “LIST_MGR”, and when the post-record path name is associated with the path name of the data to be reproduced, the data to be reproduced is post-record editing Among the path names of data to be reproduced, data to which a path name including “MOV” is assigned, that is, data to which an after-record path name associated with video data is assigned. That is, audio data is acquired, D / A conversion is performed, and video data is output to a CRT and audio data is output to a speaker in parallel.
[0009]
The CRT and the speaker respectively receive video data and audio data from the data acquisition unit, display video according to these data, and output audio.
FIG. 12 is a diagram logically showing the data structure in the recording unit when conventional post-record editing is performed.
A data file in which video data and audio data are stored is placed under a directory having a name obtained by adding a 4-digit number to “PRG”.
[0010]
By the way, in recent years, as a recording unit used in a portable device such as a VTR camera, a mobile phone, and a portable music player, a next generation memory card that is lightweight and compact and typified by an SD (Secure Digital) card or the like is used. became.
This next-generation memory card follows the storage format of data used by the OS of the personal computer so that data can be easily exchanged with the personal computer. Although it has a hierarchical structure consisting of directories and files and has a storage capacity of about 64 MB, which is lower than that of hard disks, it has attracted attention as a recording medium for exchanging data between the above-mentioned portable devices and between portable devices and personal computers. I'm bathing.
[0011]
It goes without saying that data editing can be easily performed if such a next-generation memory card is connected to the interface section of the above-mentioned personal computer. A functional unit similar to a personal computer, that is, a recording unit, a data storage unit for storing data in the recording unit, and a data acquisition unit for acquiring data to be output from the recording unit. There is something that is possible.
[0012]
[Problems to be solved by the invention]
However, the above prior art has the following problems.
That is, in the above-described portable device, if the above-described dubbing, that is, data editing is frequently performed, the association information increases in the management file in the next-generation memory card, which may press the limited storage capacity. There is.
[0013]
Therefore, the present invention has been made in view of the above problems, and the amount of data in a recording medium can be obtained even when data editing is frequently performed in a device having a recording medium with a small storage capacity. Acquisition device and data storage device, data storage device capable of storing data of the same content as conventional, a data acquisition method for acquiring data from this recording medium, and storing data in this recording medium It is an object to provide a data storage method.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, a recording medium according to the present invention is a recording medium storing one or more data files and address information indicating a path of the data file, and the address information includes the path information. A numerical value obtained based on a predetermined partial notation in the name notation is stored in a data format having a data size smaller than that in the case where the path name is stored as a character string.
[0015]
The data acquisition device according to the present invention is a data acquisition device for acquiring a target data file from the recording medium, and corresponds to the data file to be acquired from the numerical values stored in the recording medium. The name of the path is obtained by executing a predetermined operation for synthesizing a numerical value determined by the numerical value determining means for determining the numerical value to be processed and a character string converted from the numerical value determined by the numerical value determining means into the predetermined character string. A path name generating means for generating a path name, and an acquiring means for acquiring, if there is a data file stored in the recording medium associated with a path name generated by the path name generating means. The data acquisition method according to the present invention is a data acquisition method for acquiring a target data file from the recording medium described above, and is stored in the recording medium. A numerical value determination step that determines the numerical value corresponding to the data file to be acquired from the numerical values that are to be acquired, and a predetermined character string are generated, and the numerical value determined by the numerical value determination step is converted into a character string In the data file stored in the recording medium, the path name generated by the path name generation step is associated with the path name generation step of generating a path name by combining And an acquisition step of acquiring if there is something.
[0016]
The data storage device according to the present invention is a data storage device for storing a data file on a recording medium, and a data acquisition means for acquiring the data file, and a path name is generated and assigned to the acquired data file A numerical value having a data size smaller than the name of the path as address information corresponding to the name of the path based on a predetermined partial notation in the notation of the name of the path by path allocation means and a predetermined calculation And a storage unit for storing the numerical value in the recording medium and the data file associated with the path name for specifying the location of the data file in the recording medium. The data storage method according to the present invention is a data storage method for storing a data file on a recording medium, An address corresponding to the path name based on a predetermined partial notation in the data acquisition step to be obtained, a path allocation step to generate a path name and assign to the acquired data file, and the path name notation As the information, the numerical value generation step for generating a numerical value of a data size smaller than the name of the path, the data file in which the path name for specifying the location of the data file on the recording medium and the numerical value are associated with each other. A storage step of storing in the recording medium.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings.
<First Embodiment>
FIG. 1 is an external view of a VTR camera provided with a recording medium, a data acquisition device, and a data storage device according to the first embodiment of the present invention.
[0018]
This VTR camera is an SD card compatible digital VTR camera, has an SD card interface, and can store recorded audio data and video data on a video tape and an SD card.
Since recording and recording on a video tape are irrelevant to the present invention, the video tape is not inserted and only the SD card is inserted, and the captured video data and audio data are all stored in the SD card. Shall be.
[0019]
FIG. 2 is a functional block diagram showing an internal configuration of the VTR camera. The VTR camera includes a video / audio processing device 100 for inputting / outputting video / audio data to / from a recording medium, a CCD (Charge Coupled Device), and the like. , A microphone (hereinafter referred to as “microphone”), an operation switch for receiving an instruction from the operator, a liquid crystal display, and a speaker.
[0020]
The video / audio processing apparatus 100 includes a data storage unit 110, a recording unit 120, and a data acquisition unit 130 corresponding to the data storage device, the recording medium, and the data acquisition device of the present invention, respectively.
The data storage unit 110 and the data acquisition unit 130 include recording media such as a CPU, a RAM, and a ROM. Among these, the data storage unit 110 includes a video / audio recording unit 111, a character string identifier generation unit 112, and a character string integer identifier. The data acquisition unit 130 includes a video / audio reproduction unit 131 and an integer character string identification conversion unit 132.
[0021]
Hereinafter, the video / audio processing apparatus 100 will be described.
First, each functional unit in the data storage unit 110 will be described.
When receiving the video data and the audio data from the CCD and the microphone, the video / audio recording unit 111 requests the character string identifier generation unit 112 for a path name to be given to each of the video data and the audio data. The identifier generation unit 112 receives a path name to be given to the video data and a path name to be given to the audio data, and the character string integer identifier conversion unit 113 receives one path name corresponding to each of the video data and audio data. The numerical value is received, and the video data path name is assigned to the video data and stored in the recording unit 120. The audio data is associated with the path name of the audio data and stored in the recording unit 120. A management file provided for data management existing in the recording unit 120 with a flag added and the value of this flag set to “0”, for example , The path name "D: ¥ MGR_INFO ¥ PROG_MGR" is stored in the management file that is indicated by.
[0022]
In the path name, “D:” is a drive name indicating an SD card, “MGR_INFO” is a directory name for management, and “PROG_MGR” is a management file name for data management. It is.
When the audio / video recording unit 111 receives only audio data from the microphone for post-record editing, the video / audio recording unit 111 recognizes that the received audio data is for post-record editing by the signal output from the operation switch. The designation of the target video / audio is received, the path name corresponding to this video / audio is output to the character string identifier generation unit 112, and the path name to be given to the audio data received for post-record editing is requested. The path name of the audio data for post-record editing is received from the character string identifier generation unit 112, and the path name is associated with the audio data for post-record editing and stored in the recording unit 120.
[0023]
Note that when recording audio for post-recording editing, that is, after-recording (hereinafter referred to as “after-recording”), the video / audio recording unit 111 performs audio data for post-recording editing (hereinafter referred to as “post-recording data”). The video / audio reproduction unit 131 receives a synchronization signal for synchronizing the video data to be post-record edited. When the character string identifier generation unit 112 receives a request for the above path name from the video / audio recording unit 111 in the normal recording and recording other than after-recording, the character string identifier generation unit 112 refers to the recording unit 120 to check the path name of the video data and the audio data. As path names, path names that are not yet used, for example, “D: ¥ PRG0001 ¥ MOV001F.MOD” and “D: ¥ PRG0001 ¥ AUD001F.MOD” are generated.
[0024]
In this path name, “.MOD” added after the file name “AUD001F” is an extension indicating that the data specified by the path name is used by the video / audio processing apparatus 100. is there.
This path name is a data storage location in a data structure having a hierarchical structure, that is, a drive name indicating a path, a directory name, and a file name concatenated. In the above example, the portion corresponding to the drive name is “D:”, the part corresponding to the directory name is “PRG0001”, and the part corresponding to the file name is “MOV001F” and “AUD001F”.
[0025]
The symbol “¥” in the path name is inserted to indicate a delimiter between the drive name, directory name, and file name.
More specifically, the directory name and file name are composed of a predetermined character part and a variable hexadecimal number part. In the above example, “PRG” in the directory name “PRG0001” is , Means the above-described character part, which is one unit recorded continuously, that is, a program, and “0001” in the directory name “PRG0001” is the above-mentioned number part, and video in units of the program. And a number assigned to identify the audio data.
[0026]
“MOV” in the file name “MOV001F” is the above-described character portion and is a character string for indicating video data, and “AUD” in the file name “AUD001F” is audio data. In addition, “001F” in the file names “MOV001F” and “AUD001F” is the above-described numeric part, and the video data and audio data recorded and recorded in parallel, that is, the same The same numerical value is given to the group data.
[0027]
On the other hand, when the video / audio recording unit 111 specifies a path name of video data to be post-record edited and a path name to be assigned to the post-record data is requested, the character string identifier generation unit 112 The path name is generated by changing the “MOV” part included in the file name in the path name to “AU”.
For example, when the specified path name is “D: ¥ PRG0001 ¥ MOV001F.MOD”, the path name is generated as “D: ¥ PRG0001 ¥ AU001F.MOD”.
[0028]
The character string integer identifier conversion unit 113 receives a path name from the character string identifier generation unit 112 and generates a numerical value based on the received path name.
FIG. 3 is a diagram showing a relationship between a path name received from the character string identifier generation unit 112 and a numerical value generated by the character string integer identifier conversion unit 113 based on the path name.
For example, when the received path name is “D: ¥ PRG0001 ¥ AUD001F.MOD”, the numeric part 1 of the directory name and the numeric part 2 of the file name, that is, “0001” and “001F” are extracted. These are connected to generate a numerical value “000001F”.
[0029]
More specifically, the notation shown in the numeric part 1 and the numeric part 2 of the path name “D: ¥ PRG0001 ¥ AUD001F.MOD”, that is, “0001” and “001F” is strictly a file. The character string integer identifier conversion unit 113 converts the character “0001001F” into an 8-digit hexadecimal number for file management when it is a part recognized as a character for management and is concatenated to generate “0001001F”. And a numerical value “0001001F” is generated as a 4-byte integer value.
[0030]
By executing such an operation, the character string integer identifier conversion unit 113 generates a numerical value from the path name, and outputs the generated numerical value to the video / audio recording unit 111.
Further, as shown in FIG. 3, one numerical value is a source for generating a plurality of path names, and a plurality of related path names are a source for generating a single numerical value.
The recording unit 120 is an SD card having a storage capacity of 64 MB and stores video data, audio data, and information for managing these data, and the storage form of these data is the same as the storage form of the file in the personal computer. The data structure has a hierarchical structure including directories and files.
[0031]
Next, the data acquisition unit 130 will be described.
When a playback instruction is given from the operation switch, the video / audio playback unit 131, for example, “D: ¥ PRG0001 ¥ MOV001F.MOD” and “D: ¥ PRG0001 ¥ AUD001F.MOD”, for which the playback instruction is given. Is output to the integer character string identification conversion unit 132, and as a result, a numerical value corresponding to the path name of the instructed data, for example “0001001F”, is received from the integer character string identification conversion unit 132.
[0032]
Then, the video / audio reproduction unit 131 refers to the same numerical value as the numerical value “000001F” existing in the management file in the recording unit, and refers to the value of the flag assigned to this numerical value.
If the value of this flag is “0”, the video / audio reproduction unit 131 recognizes that no post-record editing has been performed, and the path name of the data for which the reproduction instruction is given, that is, “D: ¥ PRG0001 ¥ MOV001F. Data associated with “MOD” and “D: ¥ PRG0001 ¥ AUD001F.MOD” is acquired from the recording unit 120, and video data is output to a liquid crystal display and audio data is output to a speaker in parallel.
[0033]
On the other hand, if the value of this flag is “1”, the video / audio reproduction unit 131 recognizes that the post-record editing has been performed, and the integer character string identification conversion unit 132 sends the numerical value “0001001F” generated above. The post-record data path name “D: ¥ PRG0001 ¥ AU001F.MOD” is acquired from the integer character string identification conversion unit 132 as a result. Data, that is, video data having a path name “D: ¥ PRG0001 ¥ MOV001F.MOD” of video data for which post-recording data and playback instructions have been issued is acquired from the recording unit 120, and the video data is recorded on the liquid crystal display and the post-recording data is recorded on the speaker. Output in parallel.
[0034]
When the signal output from the operation switch indicates an instruction for recording audio for post-record editing, the video / audio reproduction unit 131 displays a path name of video data to be post-record edited, for example, “D: ¥ PRG0001 ¥ MOV001F”. .MOD "is acquired from the recording unit 120, the video data is output to the liquid crystal display, and a synchronization signal for synchronizing the post-recording data and the video data to be post-recording edited is recorded by the video / audio recording unit. To 111.
[0035]
The integer character string identification conversion unit 132 receives the path name from the video / audio reproduction unit 131, and generates a numerical value from the received path name using an operation in which the relationship between the path name and the numerical value shown in FIG. 3 is defined.
In addition, when a numerical value is given from the video / audio reproduction unit 131, the integer character string identification conversion unit 132 generates a post-record data path name from the numerical value using the above-described calculation.
[0036]
More specifically, the integer character string identification conversion unit 132 converts the 8-byte numerical value “0001001F” into the character “0001001F”, and the upper four digits, that is, “0001”, and the lower four digits, that is, “ It is divided into “001F”, “D: PRG” is inserted at the beginning, characters “AU” are inserted between the first 4 digits and the last 4 digits, and symbols are used to separate drive names, directory names, and file names. Insert "\" to generate the post-record data path name "D: \ PRG0001 \ AU001F.MOD"
The description of each unit in the video / audio processing apparatus 100 configured as described above is finished, and then the data configuration in the recording unit 120 will be described.
[0037]
FIG. 4 is a diagram logically showing the data structure in the recording unit 120.
In the management file indicated by the path name “D: ¥ MGR_INFO ¥ PROG_MGR”, the ID for specifying the path of the data stored in the SD card, that is, the above numerical value is stored in the recording unit 120. These numerical values are provided with a flag indicating whether or not post-record editing has been performed.
[0038]
The contents of the video data and audio data are placed under a directory starting with “PRG”, the video data includes “MOV” in the file name, and the audio data includes “AUD” in the file name. Is followed immediately by “AU”.
Such data structure and regularity of file names are brought about by the processing in the data storage unit 110, and the processing for storing data in the recording unit 120 will be described below.
[0039]
FIG. 5 is a flowchart showing a process for storing data in the recording unit 120, that is, a process for recording and recording in the video / audio processing apparatus 100.
The video / audio recording unit 111 determines whether or not a recording instruction has been given based on a signal output from the operation switch (step S101), and when the recording instruction is accepted, the video and audio input from the CCD and the microphone. Data and voice data are received (step S102), and a path name to be given to these data is requested to the character string identifier generation unit 112.
[0040]
In accordance with this request, the character string identifier generation unit 112 refers to the inside of the recording unit 120 and uses an unused directory number, for example, A ₁ A ₂ A _Three A _Four And an unused group number, eg, a ₁ a ₂ a _Three a _Four (Steps S103 to S104), and the path name 1 “D: ¥ PRGA for video data” ₁ A ₂ A _Three A _Four ¥ MOVa ₁ a ₂ a _Three a _Four ”, Path name 2 for voice data“ D: ¥ PRGA ₁ A ₂ A _Three A _Four ¥ AUDa ₁ a ₂ a _Three a _Four , And the string integer identifier conversion unit 113 generates a numerical value “A” based on these path names. ₁ A ₂ A _Three A _Four a ₁ a ₂ a _Three a _Four "Is generated (step S105).
[0041]
The video / audio recording unit 111 stores the path name 1 in the video data and the path name 2 in the audio data in the recording unit 120 and stores the value “0” in the above numerical value. A step of determining whether or not a recording instruction is given by the video / audio recording unit 111 by storing the flag added in a management file in the recording unit 120, that is, “D: ¥ MGR_INFO ¥ PROG_MGR” (step S106). Return to S101.
[0042]
FIG. 6 is a flowchart showing a process for performing post-record editing on the video and audio recorded in this way.
When the video / audio reproduction unit 131 recognizes that the after-recording editing has been accepted by the signal output from the operation switch, it starts the following processing (step S107).
[0043]
That is, when the post-record editing is accepted, the video / audio reproduction unit 131 passes the path name 3 “D: ¥ PRGA” of the video data targeted for the post-record editing. ₁ A ₂ A _Three A _Four ¥ MOVa ₁ a ₂ a _Three a _Four ”And voice data path name 4“ D: ¥ PRGA ₁ A ₂ A _Three A _Four ¥ AUDa ₁ a ₂ a _Three a _Four "Is acquired (step S108).
Then, the integer character string identification conversion unit 132 passes the path name indicating the storage location of the data subjected to post-record editing, that is, the numerical value “A” corresponding to the path name 3 and the path name 4. ₁ A ₂ A _Three A _Four a ₁ a ₂ a _Three a _Four "Is generated by calculation and acquired. (Step S109).
[0044]
The video / audio reproduction unit 131 reproduces the video data of the path name 3 that is the target of post-recording editing (step S110), and the video / audio recording unit 111 records the post-recording audio that is blown during the reproduction of the video data. Is recorded (step S111).
Then, the integer character string identification conversion unit 132 passes the path name to be added to the post-recording voice data, that is, the path name 5 “D: ¥ PRGA”. ₁ A ₂ A _Three A _Four ¥ AUa ₁ a ₂ a _Three a _Four "Is generated based on the numerical value (step S112), and the video / audio recording unit 111 is notified of this path name 5.
[0045]
Upon receiving the notification, the video / audio recording unit 111 stores the recorded post-recording audio in association with the path name 5 and stores the numerical value “A” in the management file in the recording unit 120. ₁ A ₂ A _Three A _Four a ₁ a ₂ a _Three a _Four "1" is set to "1" (step S113), and the video / audio recording unit 111 returns to the first step S107 for determining whether post-recording editing has been accepted.
[0046]
Next, a process for acquiring data from the recording unit 120 will be described.
FIG. 7 is a flowchart showing a process for acquiring data from the recording unit 120 in the data acquisition unit 130, that is, an operation for reproduction, in the video / audio processing apparatus 100.
The video / audio reproduction unit 131 determines whether or not a reproduction instruction has been given based on a signal output from the operation switch (step S115). When the reproduction instruction is accepted, the path name to be reproduced is determined from the operation switch. For example, path name 1 of video data “D: ¥ PRGA ₁ A ₂ A _Three A _Four ¥ MOVa ₁ a ₂ a _Three a _Four ”And voice data path name 2“ D: ¥ PRGA ₁ A ₂ A _Three A _Four ¥ AUDa ₁ a ₂ a _Three a _Four "Is received (step S116), and these path name 1 and path name 2 are output to the integer character string identification conversion unit 132.
[0047]
The integer character string identification conversion unit 132 receives the numerical values corresponding to the received path name 1 and path name 2, that is, “A ₁ A ₂ A _Three A _Four a ₁ a ₂ a _Three a _Four Is generated and output to the video / audio reproduction unit 131 (step S117).
Then, the video / audio reproduction unit 131 refers to the management file in the recording unit 120 (step S118), refers to the value of the flag added to the numerical value in this, and the value of this flag is “1”. It is determined whether or not (step S119).
[0048]
When the value of the flag is not “1”, that is, when post-record editing is not performed, the video / audio reproduction unit 131 acquires the video data and audio data of the path name 1 and the path name 2 from the recording unit 120 (Step S1). S120) Each acquired data, that is, audio data or after-recording data and video data is output in parallel to the speaker and the liquid crystal display (step S123), and the reproduction is instructed by the signal output from the operation switch. The process returns to the first step S115 for determining whether or not.
[0049]
On the other hand, when the value of the flag is “1”, that is, when the post-record editing is performed, the video / audio reproduction unit 131 sends the post-record data path name to the integer character string identification conversion unit 132 based on the numerical value. 3, that is, “D: ¥ PRGA ₁ A ₂ A _Three A _Four ¥ AUa ₁ a ₂ a _Three a _Four ”And the path name 3 is acquired (step S121), and the video data of the path name 1 and the post-recording data of the path name 3 are acquired (step S122).
[0050]
The video / audio reproduction unit 131 outputs the acquired data, that is, audio data or post-recording data and video data, in parallel to the speaker and the liquid crystal display, respectively (step S123). The process returns to the first step S115 for determining whether or not a reproduction instruction has been given.
With the configuration and function as described above, information indicating whether video data and audio data have been post-record edited is indicated by a 1-bit flag, and the path name indicating the location of the post-record data is post-record editing. Necessary for post-recording because it is generated by the operation of converting the numerical value into a character based on one 4-byte numerical value generated from the video data and audio data on the side where the data is made, and inserting the determined character into this. The amount of information that becomes can be reduced.
<Second Embodiment>
Next, the data transmission apparatus in the second embodiment will be described.
[0051]
In the second embodiment, the configuration of the recording medium, the data acquisition device, and the data storage device, that is, the recording unit 120, the data acquisition unit 130, and the data storage unit 110 is the same as the configuration of the first embodiment. Contents of data stored in the management file of the recording unit 120, generation of data stored in the management file, determination of whether post-record editing has been performed using the data stored in the management file, and post-recording The only difference is the generation of a path name indicating the location of the data.
[0052]
Therefore, description of the above-described parts that are not different will be omitted, and operations of the recording unit 120, the data acquisition unit 130, and the data storage unit 110 in the second embodiment will be described.
First, processing in the data storage unit 110 will be described.
When receiving the video data and the audio data from the CCD and the microphone, the video / audio recording unit 111 requests the character string identifier generation unit 112 for a path name to be given to each of the video data and the audio data. The identifier generation unit 112 receives the path name to be assigned to the video data and the path name to be assigned to the audio data, and the character string integer identifier conversion unit 113 corresponds to the path names of these video data and audio data. One numerical value is received, the video data path name is assigned to the video data, the audio data path name is associated with the audio data, stored in the recording unit 120, and the numerical value exists in the recording unit 120. Store in a management file provided for data management.
[0053]
That is, in the second embodiment, no flag is assigned to the numerical value.
When the audio / video recording unit 111 receives only audio data for post-record editing from the microphone, the video / audio recording unit 111 recognizes that the audio data received by the operation switch is for post-record editing, and is subject to post-record editing. A video / audio designation is received, a path name corresponding to the video / audio is received from the video / audio reproduction unit 131, and the path name is output to the character string identifier generation unit 112 to be added to the received audio data for post-record editing. The path name of the power and a numerical value corresponding to the voice data are requested. As a result, the path name of the after-recording data is received from the character string identifier generation unit 112, and the path name corresponding to the path name is received from the character string integer identifier conversion unit 113 The numerical value is received, the recording unit 120 stores the path name in association with the post-record data in the recording unit 120, and the path name. A corresponding numerical value is present in the management file of the recording unit 120, and a numerical value corresponding to the path name of the after-recording data is associated with one numerical value corresponding to the video data and audio data to be edited. Store.
[0054]
When the video / audio recording unit 111 requests a path name to be given to the audio after-recording data, the character string identifier generation unit 112 refers to the recording unit 120 and is not yet used as the path name of the after-recording data. A path name, for example, “D: ¥ PRG0002 ¥ AUD0006.MOD” is generated.
That is, the post-record data path name is generated regardless of the numerical values corresponding to the video data and audio data path names on the post-record editing side.
[0055]
This path name is a concatenation of a drive name, a directory name, and a file name indicating the data storage location in the hierarchical data structure. In the above example, the portion corresponding to the drive name is “ D: ”, the portion corresponding to the directory name is“ PRG0002 ”, and the portion corresponding to the file name is“ AUD0006 ”.
[0056]
Then, the character string identifier generating unit 112 outputs the generated path name to the video / audio recording unit 111 and the character string integer identifier converting unit 113.
By performing the above-described processing, the data configuration in the management file of the recording unit 120 in the second embodiment is different from that in the first embodiment.
FIG. 8 is a diagram logically showing the data configuration of the recording unit 120 in the second embodiment.
[0057]
When post-record editing is performed in the management file of the recording unit 120, that is, “D: ¥ MGR_INFO ¥ PROG_MGR”, the numerical value corresponding to the path name of the data on the side on which post-record editing is performed, that is, the ID, Instead of the flag assigned in the first embodiment, a numerical value corresponding to the path name of the audio data recorded for post-record editing, that is, an after-record ID is assigned. Unlike the form, the path name of the after-recording data is different from the first embodiment in that the path name of the after-recording data includes the characters “AUD” in the same way as the path name of the voice data other than for after-recording editing.
[0058]
Next, the difference between the data acquisition unit 130 and the first embodiment will be described.
When a playback instruction is given by the operation switch, the video / audio playback unit 131, for example, “D: ¥ PRG0001 ¥ MOV0002.MOD” and “D: ¥ PRG0001 ¥ AUD0002.MOD” is the path name of the data for which the playback instruction has been issued. Is output to the integer character string identification conversion unit 132, and as a result, a numerical value corresponding to the path name of the instructed data, for example, “00010002” is received from the integer character string identification conversion unit 132.
[0059]
The above is the same in the first embodiment.
Then, the video / audio reproduction unit 131 refers to the same numerical value as the numerical value “00010002” existing in the management file in the recording unit, and determines whether another numerical value, that is, an after-recording ID is assigned to the numerical value. judge.
If the after-recording ID is not assigned, the video / audio reproduction unit 131 recognizes that the after-recording editing has not been performed, and the path name of the data for which the reproduction instruction has been given, that is, “D: ¥ PRG0001 ¥ MOV0002.MOD” and Data associated with “D: ¥ PRG0001 ¥ AUD0002.MOD” is acquired from the recording unit 120, video data is output to a liquid crystal display, and audio data is output to a speaker.
[0060]
On the other hand, when the after-recording ID is assigned, the video / audio reproduction unit 131 recognizes that the after-recording editing has been performed, and the integer character string identification conversion unit 132 receives a numerical value, for example, “00020006”. , The post-record data path name “D: ¥ PRG0002 ¥ AUD0006.MOD” is acquired from the integer character string identification conversion unit 132, and this path name is obtained. Name, that is, data of the post-record data and the path name “D: ¥ PRG0001 ¥ MOV0002.MOD” of the video data for which reproduction is instructed is obtained from the recording unit 120, the video data is output to the liquid crystal display, and the post-record data is transmitted to the speaker. Output to.
[0061]
The integer character string identification conversion unit 132 receives the path name from the video / audio reproduction unit 131 and follows the relationship between the path name and the numerical value shown in FIG. 3, and the numerical value based on the path name received by the calculation using this relationship. Furthermore, when the post-record data path name is generated by the video / audio reproduction unit 131, the post-record data path name is generated from the given numerical value.
[0062]
However, since the path name of the after-recording data is irrelevant to the numerical values corresponding to the path names of the video data and audio data on the side where the after-recording editing is performed, the integer character string identification conversion unit 132 uses the normal audio data from the numerical values. The path name of the voice data is generated from the after-recording ID using the same regularity as that for generating the path name.
Therefore, the path name of the generated post-record data is, for example, “D: ¥ PRGB ₁ B ₂ B _Three B _Four ¥ AUDb ₁ b ₂ b _Three b _Four "
[0063]
Next, a process for storing data in the recording unit 120 will be described.
FIG. 9 is a flowchart showing a process for storing data in the recording unit 120 in the video / audio processing apparatus 100, that is, a process for recording and recording in the second embodiment.
The video / audio recording unit 111 determines whether or not a recording instruction has been given based on a signal output from the operation switch (step S201). If the recording instruction is accepted, the video and audio recording unit 111 receives video input from the CCD and the microphone. The data and voice data are received (step S202), and the character string identifier generation unit 112 is requested for a path name to be given to these data.
[0064]
In accordance with this request, the character string identifier generation unit 112 refers to the recording unit 120 to generate an unused directory number, for example, A1A2A3A4 and an unused group number, for example, a1a2a3a4 (steps S203 to S204). Path name 1 for video data “D: ¥ PRGA ₁ A ₂ A _Three A _Four ¥ MOVa ₁ a ₂ a _Three a _Four ”, Path name 2 for voice data“ D: ¥ PRGA ₁ A ₂ A _Three A _Four ¥ AUDa ₁ a ₂ a _Three a _Four ”And a numerical value“ A ”indicating these two path names. ₁ A ₂ A _Three A _Four a ₁ a ₂ a _Three a _Four "Is generated (step S205).
[0065]
The above steps are processes common to the first embodiment.
The video / audio recording unit 111 associates the path name 1 with the video data and associates the path name 2 with the audio data and stores the video data in the recording unit 120, and stores the numerical value in the management file in the recording unit 120, The data is stored in “D: ¥ MGR_INFO ¥ PROG_MGR” (step S206), and the process returns to the first step S201 for determining whether or not the video / audio recording unit 111 has instructed the recording.
[0066]
That is, in the second embodiment, no flag is assigned to the numerical value.
FIG. 10 is a flowchart showing a process for performing post-record editing on the video and audio recorded in this way.
When the video / audio reproduction unit 131 recognizes that the post-recording editing has been accepted based on the signal output from the operation switch, the video / audio reproduction unit 131 starts the following processing (step S207).
[0067]
That is, when the post-record editing is accepted, the video / audio reproduction unit 131 passes the path name 3 “D: ¥ PRGA” of the video data targeted for the post-record editing. ₁ A ₂ A _Three A _Four ¥ MOVa ₁ a ₂ a _Three a _Four ”And voice data path name 4“ D: ¥ PRGA ₁ A ₂ A _Three A _Four ¥ AUDa ₁ a ₂ a _Three a _Four "Is acquired (step S208).
Then, the integer character string identification conversion unit 132 passes the path name indicating the storage location of the data subjected to post-record editing, that is, the numerical value “A” corresponding to the path name 3 and the path name 4. ₁ A ₂ A _Three A _Four a ₁ a ₂ a _Three a _Four "Is generated by calculation and acquired. (Step S209).
[0068]
Then, the video / audio reproduction unit 131 reproduces the video data of the path name 3 subjected to the post-recording editing (step S210), and records the post-recording audio that is blown during the reproduction of the video data (step S211).
The above is the same in the first embodiment.
Then, the video / audio recording unit 111 requests the character string identifier generation unit 112 for a path name to be given to the after-recording data.
[0069]
In accordance with this request, the character string identifier generation unit 112 refers to the recording unit 120 to generate an unused directory number, for example, B1B2B3B4 and an unused group number, for example, b1b2b3b4 (steps S212 to S213). Data path name 5 “D: ¥ PRGB ₁ B ₂ B _Three B _Four ¥ AUDb ₁ b ₂ b _Three b _Four ”And a numerical value corresponding to this path name, that is,“ B ₁ B ₂ B _Three B _Four b ₁ b ₂ b _Three b _Four "Is generated (step S214).
[0070]
The video / audio recording unit 111 associates the post-record data with the path name 5 and stores it in the recording unit 120, and further exists in the management file in the recording unit 120, that is, “D: ¥ MGR_INFO ¥ PROG_MGR”. The numerical value “A” corresponding to the path name of the video data and audio data on the side where the post-record editing is performed ₁ A ₂ A _Three A _Four a ₁ a ₂ a _Three a _Four ”And the numerical value“ B ”corresponding to the post-record data path name. ₁ B ₂ B _Three B _Four b ₁ b ₂ b _Three b _Four Are stored in association with each other (step S215), and the video / audio recording unit 111 returns to the first step S207 for determining whether post-recording editing has been accepted.
[0071]
Next, a process for acquiring data from the recording unit 120 will be described.
FIG. 11 is a flowchart illustrating processing for acquiring data from the recording unit 120 in the data acquisition unit 130, that is, an operation for reproduction, in the video / audio processing apparatus 100 according to the second embodiment.
The video / audio reproduction unit 131 determines whether or not a reproduction instruction has been given based on a signal output from the operation switch (step S216). When the reproduction instruction is accepted, the following process is started.
[0072]
That is, the video / audio reproduction unit 131 receives a path name to be reproduced from the operation switch, for example, a path name 1 “D: ¥ PRGA” of the video data. ₁ A ₂ A _Three A _Four ¥ MOVa ₁ a ₂ a _Three a _Four ”And voice data path name 2“ D: ¥ PRGA ₁ A ₂ A _Three A _Four ¥ AUDa ₁ a ₂ a _Three a _Four "Is received (step S217), and the path name 1 and path name 2 are output to the integer character string identification conversion unit 132.
[0073]
The integer character string identification conversion unit 132 receives the numerical values corresponding to the received path name 1 and path name 2, that is, “A ₁ A ₂ A _Three A _Four a ₁ a ₂ a _Three a _Four Is generated and output to the video / audio reproduction unit 131 (step S218).
Then, the video / audio reproduction unit 131 refers to the management file in the recording unit 120 (step S219), and assigns another numerical value to the ID in the management file corresponding to the numerical value received from the integer character string identification conversion unit 132, that is, Then, it is determined whether or not an after-recording ID is associated (step S220).
[0074]
When the after-recording ID is not associated, the video / audio reproduction unit 131 acquires the video data of the path name 1 and the audio data of the path name 2 from the recording unit 120 (step S221), and each acquired data, that is, the audio Data or after-recording data and video data are output in parallel to the speaker and the liquid crystal display, respectively (step S225), and the process returns to the first step S216 for determining whether or not a reproduction instruction is given by the signal output from the operation switch.
[0075]
On the other hand, for the after-recording ID, for example, another after-recording ID “B” ₁ B ₂ B _Three B _Four b ₁ b ₂ b _Three b _Four ”Is acquired, the video / audio reproduction unit 131 acquires this other ID (step S221), and based on this other post-recording ID, the integer character string identification conversion unit 132 sends the post-recording data. Path name 3, that is, “D: ¥ PRGB ₁ B ₂ B _Three B _Four ¥ AUDb ₁ b ₂ b _Three b _Four ”Is generated to obtain path name 3 (step S223), and video data of path name 1 and post-record data of path name 3 are obtained (step S224).
[0076]
The video / audio reproduction unit 131 outputs the acquired data, that is, audio data or post-recording data and video data, in parallel to the speaker and the liquid crystal display, respectively (step S225). By the signal output from the operation switch, The process returns to the first step S216 for determining whether or not a reproduction instruction has been given.
With the above configuration and function, whether or not video data and audio data have been post-record edited is indicated by giving another numerical value to the numerical value stored in the management file. Since it becomes a source for generating a path name indicating the location of post-record data by calculation, the amount of information necessary for post-record editing can be reduced.
[0077]
In the first embodiment and the second embodiment, the character string integer identifier conversion unit 113 and the integer character string identification conversion unit 132 follow the relationship between the path name and the numerical value shown in FIG. Similarly, the integer character string identification conversion unit 132 generates the path name of the voice data from the numerical value according to the relationship between the path name and the numerical value shown in FIG. However, due to the regularity other than the relationship shown in FIG. 3 having traceability between the path name and the numerical value, the path name may be generated from the numerical value, and the numerical value may be generated from the path name. 3 may be generated by adding 1 to the numerical value generated from the path name according to the relationship of FIG.
[0078]
In this case, when generating a path name from a numerical value, after subtracting 1 from the numerical value, the path name is generated from the numerical value according to the regularity shown in FIG.
In the first embodiment and the second embodiment, the character string integer identifier conversion unit 113 generates the post-record data path name based on the given numerical value. If so, a path name of video data and a path name of audio data corresponding to this numerical value or another path name not described may be generated.
[0079]
In this case, the video / audio reproduction unit 131 acquires the corresponding data in the recording unit 120 using the path name of the video data and the path name of the audio data as keys.
Further, in the second embodiment, the character string identifier generation unit 112 uses “as a path name of a file for storing audio data without distinguishing between normal audio data and post-recording data recorded in parallel with video. A path name including a common fixed character portion of “AUD” is generated. As a path name of a file storing audio data of normal audio recorded in parallel with a video, for example, “D: ¥ PRG0001 ¥ SEP0001” .MOD "is also generated as a path name of a file storing post-record data, for example," D: \ PRG0001 \ AUD0001.MOD "is generated, that is, a path name of normal audio data and a path of post-record data Different fixed character parts for distinguishing names may be generated.
[0080]
In the first embodiment, when the character string identifier generation unit 112 receives a request for the above path name from the audio / video recording unit 111 other than after-recording, that is, in normal recording and recording, the recording unit 120 , As path names of video data and audio data, path names that are not yet used, for example, “D: ¥ PRG0001 ¥ MOV001F.MOD” and “D: ¥ PRG0001 ¥ AUD001F.MOD” are generated. The video / audio recording unit 111 stores the video data and the audio data in the corresponding files, respectively. However, when the post-record editing is not performed, the character string identifier generation unit 112, for example, “D : \ PRG0001 \ MOV0001.MOD ", the video / audio recording unit 111 generates video data and audio. Interleaving and over motor, the path name "D: ¥ PRG0001 ¥ MOV0001.MOD" may store video data and audio data to a file specified by.
[0081]
In this case, when the post-record editing is performed, the character string identifier generation unit 112 generates a path name “D: ¥ PRG0001 ¥ AUD0001.MOD”, for example, and the video / audio recording unit 111 After-recording data is stored in a file corresponding to the path name.
That is, when only the path name “D: ¥ PRG0001 ¥ MOV0001.MOD” exists, post-recording editing is not performed, and the path name “D: ¥ PRG0001 ¥ MOV0001.MOD” and the path name “D: ¥ PRG0001”. If both “AUD0001.MOD” exist, post-record editing has been performed.
[0082]
In the first embodiment and the second embodiment, the numeric part 1 and the numeric part 2 included in the data path name are each 4 digits, and the numerical value generated from them is 8 digits. However, the total number of digits of the numeric part 1 and the numeric part 2 may be, for example, the numeric part 1 and the numeric part 2 may be three digits, respectively. Any number of digits may be used as long as the total number of digits does not exceed the number of digits generated by the character string integer identifier conversion unit 113.
[0083]
In that case, the total number of digits of number part 1 and number part 2 may be less than the number of digits generated from them, but a fixed value is stored in some digits of the generated number. By not using this digit value for path name generation, conversion between a path name and a numerical value can be performed without any trouble.
In such a case, for example, the number of digits obtained by converting the numeric part 1 and the numeric part 2 into 32-bit hexadecimal numbers by the character string integer identifier conversion unit 113 is 8 digits, and the numeric part When there are only 3 digits in each of 1 and 2, an unused portion of 8 bits is generated in each of 1 and 2, so this is a bit for distinguishing from other types of files. For example, information indicating the presence or absence of encryption may be inserted.
[0084]
In the first embodiment, when the video / audio recording unit 111 specifies a path name of video data to be post-record edited and a path name to be assigned to the post-record data is requested, the character string identifier The generation unit 112 generates the path name by changing the “MOV” part included in the file name in the specified path name to “AU”, but specifies the path name of the audio data to be post-record edited. The post-record data path name may be generated based on the voice data path name.
[0085]
In this case, the path name is generated by changing the “AUD” part included in the file name in the specified path name to “AU”.
[0086]
【The invention's effect】
As is clear from the above description, the recording medium according to the present invention is a recording medium that stores one or more data files and address information indicating the path of the data file, and the address information includes the path information. A numerical value obtained based on a predetermined partial notation in the name notation is stored in a data format having a data size smaller than that in the case where the path name is stored as a character string.
[0087]
As a result, since the path name is stored in the recording medium as a numerical value having a small data size, the data size is smaller than when the path name is stored in the recording medium as it is, and the data size of the recording medium is reduced. Reduced.
The recording medium stores a plurality of data files, the data files belong to any of a plurality of groups, and the name of the path is in the same group as the first type notation for identifying the group. And the partial notation includes the first type notation, and the path name has a relationship obtained from the numerical value by a reversible predetermined operation. It is good.
[0088]
Thereby, since the predetermined operation is reversible, the numerical value can be converted into the path name, and the path name can be converted into the numerical value.
The group may include a plurality of data files storing data of different types, and the second type notation may indicate the type of the data.
As a result, even if the data types are different, the same numerical value is used when the same first type notation is included in the path name, that is, when the data path names belong to the same group. Can be converted to
[0089]
The type may be video and audio.
Thereby, even the names of video data and audio data paths can be converted to the same numerical value if they are names of data paths belonging to the same group.
When the third data file storing the second audio data is associated with the group having the first data file storing the first audio data and the second data file storing the video data, The recording medium has a flag for indicating that the association is made in the first numerical value obtained by the predetermined calculation based on the path names of the first data file and the second data file. The added name is stored, and the path name of the third data file may be obtained by adding a predetermined notation to the first numerical value.
[0090]
Thus, from the numerical values, the address information indicating the first data file storing the audio data belonging to the same group and the second data file storing the video data, and the first data file storing the audio data associated with these data files are stored. Address information indicating three data files is generated.
When the third data file storing the second audio data is associated with the group having the first data file storing the first audio data and the second data file storing the video data, Based on the path names of the first data file and the second data file, the recording medium is based on the path name of the third data file based on the first numerical value obtained by the predetermined calculation. The second numerical value obtained by a predetermined calculation may be stored in association with each other.
[0091]
As a result, address information indicating the first data file storing the audio data belonging to the same group and the second data file storing the video data are generated from the first numerical value, and are associated with these data files. Since the address information indicating the third data file storing the audio data is generated from the second numerical value, the data size can be reduced as compared with storing the path name as it is.
[0092]
The first audio data and the video data of the group are data recorded in parallel during the same period, and the second audio data stored in the third data file is the first audio data. It may be after-recording data to be replaced with data.
Thereby, the data size of information for associating after-recording data with video data is reduced.
[0093]
The name of the path is a character string, and the predetermined partial notation in the character string indicates a character representing an n-ary number (n is a natural number). The character may be converted into the n-digit number.
Thus, the predetermined calculation can be performed by a simple mathematical calculation, and the processing apparatus can be easily configured.
[0094]
The data file is stored in a logically hierarchical storage location, and the path name includes a plurality of data files of the group, and a directory name for specifying a directory indicating the hierarchy. , Including the group name indicating the group, and the predetermined partial notation is a character part corresponding to a notation representing the number of the directory name and the n-ary number (n is a natural number) of the group name, The calculation may be made by concatenating two numerical values obtained by performing the conversion for each of the locations of the directory name and the group name.
[0095]
Thereby, address information indicating a directory name and a group name is generated based on the numerical values.
The n-ary number may be a hexadecimal number.
Thereby, the space in the data prepared for storing the numerical value can be set small, and the storage capacity of the recording medium can be further reduced.
[0096]
The data acquisition device according to the present invention is a data acquisition device for acquiring a target data file from the recording medium, and corresponds to the data file to be acquired from the numerical values stored in the recording medium. The name of the path is obtained by executing a predetermined operation for synthesizing a numerical value determined by the numerical value determining means for determining the numerical value to be processed and a character string converted from the numerical value determined by the numerical value determining means into the predetermined character string. A path name generating means for generating a path name, and an acquiring means for acquiring, if there is a data file stored in the recording medium associated with a path name generated by the path name generating means. The data acquisition method according to the present invention is a data acquisition method for acquiring a target data file from the recording medium described above, and is stored in the recording medium. A numerical value determination step that determines the numerical value corresponding to the data file to be acquired from the numerical values that are to be acquired, and a predetermined character string are generated, and the numerical value determined by the numerical value determination step is converted into a character string In the data file stored in the recording medium, the path name generated by the path name generation step is associated with the path name generation step of generating a path name by combining And an acquisition step of acquiring if there is something.
[0097]
As a result, the path name of the data file to be acquired can be generated based on a numerical value having a data size smaller than the path name stored in the recording medium, and if the data file exists, it can be acquired.
Further, the path name generation means may generate the path name for each of a plurality of different predetermined character strings.
[0098]
As a result, a plurality of path names can be generated from a single numerical value stored in the recording medium, and a plurality of data files can be acquired. Rather than storing a plurality of path names to be acquired as they are, they are stored in the recording medium. The stored data size is further reduced.
The numerical value determined by the numerical value determining means is an n-ary number (n is a natural number), and the predetermined calculation is performed by generating a character corresponding to the numerical value and generating the predetermined character string. Respectively The above composition may be performed by inserting it at a predetermined position.
[0099]
As a result, since the generated path name includes a numerical value stored in the recording medium as characters, there is no relationship between the path name and the numerical value. Respectively It can be easily guessed from the notation.
Further, the numerical value determining means has a plurality of numerical values stored in the recording medium, and the first numerical value which is one of these numerical values and the second numerical value different from the first numerical value, When the second numerical value is associated with the first numerical value, the first numerical value and the second numerical value are determined as numerical values corresponding to the data file to be acquired, and the acquisition means includes the second numerical value A data file including a predetermined first character string in a path name generated based on a numerical value, and a data file including a predetermined first character string in a path name generated based on the first numerical value It may be obtained instead of the file.
[0100]
As a result, since the association information is associated with numerical values having a smaller data size than when the association information is associated with the path names, the data capacity in the recording medium is reduced.
The numerical value stored in the recording medium is given a flag indicating either the first value or a second value different from the first value, and the path name generating means The plurality of character strings generated by (1) includes a first character string, and the path name generation means, when the second value is indicated in the numerical flag determined by the numerical value determination means, A second character string different from the first character string is generated, and the acquisition unit includes a data file including the predetermined second character string in the path name and the first character string in the path name. It may be obtained instead of the data file.
[0101]
As a result, since the association information is associated with a flag assigned to a numerical value having a smaller data size than in the case of associating the association information with path names, the data size in the recording medium is reduced.
In addition, the second character string may be obtained by deleting a predetermined character in the first character string, and the second character string is a predetermined character in the first character string. May be changed.
[0102]
As a result, the relationship between the path name and the numerical value Respectively It can be easily guessed from the notation.
The data storage device according to the present invention is a data storage device for storing a data file on a recording medium, and a data acquisition means for acquiring the data file, and a path name is generated and assigned to the acquired data file A numerical value having a data size smaller than the name of the path as address information corresponding to the name of the path based on a predetermined partial notation in the notation of the name of the path by path allocation means and a predetermined calculation And a storage unit for storing the numerical value in the recording medium and the data file associated with the path name for specifying the location of the data file in the recording medium. The data storage method according to the present invention is a data storage method for storing a data file on a recording medium, An address corresponding to the path name based on a predetermined partial notation in the data acquisition step to be obtained, a path allocation step to generate a path name and assign to the acquired data file, and the path name notation As the information, the numerical value generation step for generating a numerical value of a data size smaller than the name of the path, the data file in which the path name for specifying the location of the data file on the recording medium and the numerical value are associated with each other. A storage step of storing in the recording medium.
[0103]
As a result, the address information corresponding to the path name is stored in the recording medium as a numerical value having a small data size, so that the data size can be reduced compared to storing the information by storing the path name as it is in the recording medium. The data size of the recording medium is reduced.
The path allocating unit generates a path name by concatenating a path name of the acquired data file with a character string indicating a directory name in data management and a character string indicating a file name. Is composed of a unique character string and a first numeric string of n-ary numbers (n is a natural number), and a character string indicating a file name is a predetermined character string indicating the file type and an N-ary number (N Is a natural number), and the numerical value generating means obtains the predetermined partial notation at two locations where the first numeric string and the second numeric string are indicated. The numerical values may be generated by concatenating the numerical values obtained.
[0104]
As a result, the numerical value can be generated as address information closer to the path name.
[Brief description of the drawings]
FIG. 1 is an external view of a VTR camera including a recording medium, a data acquisition device, and a data storage device according to a first embodiment of the present invention.
FIG. 2 is a functional block diagram showing an internal configuration of a VTR camera.
FIG. 3 is a diagram illustrating a relationship between a path name received from a character string identifier generation unit and a numerical value generated by a character string integer identifier conversion unit based on the path name.
FIG. 4 is a diagram logically representing a data configuration in a recording unit in the first embodiment.
FIG. 5 is a flowchart showing processing for storing data in a recording unit, that is, processing for recording and recording, in the video / audio processing apparatus according to the first embodiment.
FIG. 6 is a flowchart showing processing for performing post-record editing on recorded video and audio in the first embodiment.
FIG. 7 is a flowchart showing processing for acquiring data from a recording unit in a data acquisition unit, that is, an operation for reproduction, in the video / audio processing apparatus according to the first embodiment.
FIG. 8 is a diagram logically representing a data configuration in a recording unit in the second embodiment.
FIG. 9 is a flowchart showing a process for storing data in a recording unit in the video / audio processing apparatus, that is, a process for recording and recording in the second embodiment.
FIG. 10 is a flowchart showing a process for performing post-record editing on recorded video and audio in the second embodiment.
FIG. 11 is a flowchart showing a process for acquiring data from a recording unit in a data acquisition unit, that is, an operation for reproduction, in the video / audio processing apparatus according to the second embodiment.
FIG. 12 is a diagram logically showing the structure of data in a recording section when conventional post-record editing is performed.
[Explanation of symbols]
100 Video / audio processor
110 Data storage
111 Video / audio recording unit
112 Character string identifier generator
113 String integer identifier converter
120 Recording unit
120 The recording section
130 Data acquisition unit
131 Video / audio playback unit
132 Integer string identification conversion unit

Claims (11)

A recording medium for storing one or more data files and address information indicating a path of the data file, wherein the address information is a numerical value obtained based on a predetermined partial notation in the notation of the name of the path. A data acquisition device for acquiring a target data file from a recording medium stored in a data format having a data size smaller than that when storing the path name as a character string ,
Numerical value determining means for determining a numerical value corresponding to a data file to be acquired from numerical values stored in the recording medium;
A path name generating means for generating a path name by executing a predetermined operation for synthesizing a predetermined character string into a character string obtained by converting a numerical value determined by the numerical value determining means into the character string;
A data acquisition apparatus comprising: an acquisition unit configured to acquire any data file stored in the recording medium that is associated with a path name generated by the path name generation unit. The path name generating means, with respect to each of a plurality of different predetermined character string, the data acquisition apparatus according to claim 1, wherein a for generating the name of the path. The numerical value determined by the numerical value determining means is an n-ary number (n is a natural number),
3. The data acquisition apparatus according to claim 2 , wherein the predetermined calculation performs the synthesis by inserting a character corresponding to the numerical value into a predetermined position of each of the generated predetermined character strings. . The numerical value determining means has a plurality of numerical values stored in the recording medium, and the first numerical value and the second numerical value different from the first numerical value, which are one of these numerical values. When the second numerical value is associated with the numerical value, the first numerical value and the second numerical value are determined as numerical values corresponding to the data file to be acquired,
The acquisition means stores a data file including a predetermined first character string in a path name generated based on a second numerical value, and a predetermined name in a path name generated based on the first numerical value. 4. The data acquisition device according to claim 3 , wherein the data acquisition device acquires the data file instead of the data file including the first character string. The numerical value stored in the recording medium is given a flag indicating either the first value or a second value different from the first value,
The plurality of character strings generated by the path name generation unit includes a first character string,
The path name generation means generates a second character string different from the first character string when the second value is indicated in the numerical flag determined by the numerical value determination means;
The acquisition unit is a data file that contains the predetermined second character string in the name of the path, according to claim 3, wherein the acquiring instead the first character string data file that contains the name of the path Data acquisition device. 6. The data acquisition apparatus according to claim 5, wherein the second character string is obtained by deleting a predetermined character in the first character string. 6. The data acquisition apparatus according to claim 5, wherein the second character string is obtained by changing a predetermined character in the first character string. A data storage device for storing a data file on a recording medium,
Data acquisition means for acquiring a data file;
A path assignment means for generating a path name and assigning it to the obtained data file;
Numeric value generation that generates a numerical value with a data size smaller than the name of the path as address information corresponding to the name of the path based on a predetermined partial notation in the notation of the path name by a predetermined operation Means,
A data storage device comprising: the data file associated with the path name for specifying the location of the data file on the recording medium; and storage means for storing the numerical value in the recording medium. The path allocating unit generates a path name by concatenating a character string indicating a directory name on a data management and a character string indicating a file name with the path name of the acquired data file.
The character string indicating the directory name is composed of a unique character string and a first number string in n-ary (n is a natural number),
The character string indicating the file name includes a predetermined character string indicating the type of the file and a second number string in N-ary (N is a natural number),
The numerical value generation means generates the numerical value by concatenating numerical values obtained by using the predetermined partial notation at two places where the first numerical string and the second numerical string are indicated. 9. The data storage device according to claim 8, wherein A recording medium for storing one or more data files and address information indicating a path of the data file, wherein the address information is a numerical value obtained based on a predetermined partial notation in the notation of the name of the path. A data acquisition method for acquiring a target data file from a recording medium stored in a data format having a data size smaller than that in the case of storing the path name as a character string ,
A numerical value determining step for determining a numerical value corresponding to the data file to be acquired from the numerical values stored in the recording medium;
A path name generation step for generating a path name by generating a predetermined character string and combining the character string converted from the numerical value determined by the numerical value determination step into a character string;
A data acquisition method comprising: an acquisition step of acquiring any data file stored in the recording medium that is associated with a path name generated by the path name generation step. A data storage method for storing a data file on a recording medium,
A data acquisition step for acquiring a data file;
A path assignment step for generating a path name and assigning it to a data file obtained;
Based on a predetermined partial notation in the notation of the name of the path, a numerical value generating step for generating a numerical value of a data size smaller than the name of the path as address information corresponding to the name of the path;
A data storage method comprising: storing the data file associated with the path name for specifying the location of the data file on the recording medium; and storing the numerical value in the recording medium.

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