JP2008052791A - Information processing system, recording and reproducing device, overwrite control method, and information processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the processing load on an external apparatus side in overwriting a file held by the external apparatus overall in a file of the same file name recorded on a recording and reproducing device relating to a file, for example, an MXF file, in which partial overwrite is prohibited. <P>SOLUTION: When the file open request from the external apparatus (a personal computer 3) instructs the overwrite of the file (base file) of the same name recorded in an optical disk D, the recording and reproducing device 2 discriminates whether the Truncate Flag included in the file open request is effective or not (namely, the deletion of the ground file is guaranteed or not), and executes the overwrite processing complying with the file open request only in the effective case. As a result, the external apparatus requires only the write instruction, while conventionally requiring instruction for file write after instructing to delete the base file. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an information processing system including a recording / reproducing apparatus and an information processing apparatus configured to be capable of data communication with each other. About the system. The present invention also relates to a recording / reproducing apparatus, an overwrite control method, and an information processing apparatus.

  Conventionally, video data is recorded on an optical disc recording medium such as a DVD (Digital Versatile Disc) or a BD (Blu-ray Disc: registered trademark). An editing system that edits video data recorded on such an optical disk recording medium is also known.

FIG. 1 shows a configuration example of a business editing system 1 that is particularly suitable for production of a television broadcast program or the like as an editing system for video data recorded on such a recording medium.
In the editing system 1, recording / reproduction with respect to an optical disk recording medium (optical disk D) is performed by a recording / reproducing apparatus 2 in the drawing. In the recording / reproducing apparatus 2, for example, video data (material image) photographed by the external camera device 4 is input and can be recorded on the optical disk D loaded therein.

Further, in the recording / reproducing apparatus 2, the video data as the material video recorded on the optical disc D in this way is relatively simple, for example, divided into predetermined scenes and edited into video files called video clips. It is possible to perform simple editing. Note that the recording / reproducing apparatus 2 has an output terminal for the video reproduced from the optical disc D, and the user can perform editing work while confirming the video on an external display device such as the display 5 shown in the figure, for example. Is done.
The recording / reproducing apparatus 2 can also write back the video clip generated by editing to the optical disc D.

  Further, the editing system 1 in this case can edit the video clip recorded on the optical disc D as described above using an information processing apparatus such as the personal computer 3. That is, the personal computer 3 in this case instructs the recording / reproducing apparatus 2 to transfer the video clip recorded on the optical disc D, and in response to this, various editing processes are performed on the video clip transferred from the recording / reproducing apparatus 2 side. Can be applied.

Then, the personal computer 3 can write back the video clip subjected to the editing process in this manner to the optical disc D by giving an instruction to the recording / reproducing apparatus 2.
At this time, if there is a video clip with the same file name on the optical disc D, the edited video clip instructed to be written back in this way is the clip with the same file name on the optical disc D (the base on which editing was performed). Clip) is overwritten.

Here, in the conventional editing system, at the time of writing back the edited clip to the optical disc D, overwriting in units of files as video clips is permitted, but only a part of the edited part is edited. Overwriting the corresponding part of the base clip (that is, overwriting partly) was prohibited.
This is in consideration of the file format adopted for the video clip in this case. That is, in the editing system as shown in FIG. 1, a video clip is recorded in a business-specific file format called an MXF (Material eXchange Format) file. In this MXF file, video data or the like is recorded. Each piece of data is stored in a state of being separated according to a predetermined format, not in chronological order. For this reason, if partial overwriting is permitted, the process for specifying the part to be overwritten becomes complicated, and the process for securing a time-series connection after overwriting becomes complicated. As a result, the processing time and processing load increase, and the usefulness of the system may be impaired. For this reason, partial overwriting of video clips is prohibited.

  In order to allow overwriting of the entire video clip and disable partial overwriting in this way, conventionally, this is realized by imposing the following restrictions on the recording / reproducing apparatus 2 side. I was trying. That is, when a video clip with the same file name already exists on the optical disc D, only “deletion” is permitted.

  According to this, on the personal computer 3 side, first, the base file having the same file name on the optical disc D must be deleted, so that partial overwriting can be made impossible. In other words, this can ensure that partial overwriting is not performed.

  On the other hand, if the base clip with the same file name is deleted as described above, a file open request designating “write” (firstly performed when the target file is read / written). The personal computer 3 makes a file open request designating “write” for the edited clip to the recording / playback apparatus 2 side, and the edited clip is newly set. Can be written on the optical disc D. That is, after the background file is deleted in this way, the edited clip is newly written, and as a result, the entire clip can be overwritten.

  Thus, in the past, if there is a clip with the same file name, only “deletion” is permitted, so partial overwriting becomes impossible, while new writing is possible. Thus, it is possible to overwrite the entire clip.

In addition, about the related prior art, the following patent documents can be mentioned.
JP 2004-5895 A

However, according to the above description, in the conventional editing system, when overwriting the entire clip, the personal computer 3 side has two actions: an instruction for deleting the base clip and a new writing instruction for the edited video clip. Will have to be done.
According to this, since two actions are necessary for what is essentially only one action for overwriting, the processing load on the personal computer 3 side is increased accordingly. In fact, since the personal computer 3 gives these instructions based on user operations, this increases the operation burden on the user accordingly.
Thus, when the operation burden on the user increases, the efficiency of editing work deteriorates.

  For these reasons, in the business editing system as shown in FIG. 1, the partial overwriting cannot be performed due to the circumstances described above, and the entire clip is overwritten in one action. It is requested to be possible.

Therefore, in the present invention, in view of the above problems, the information processing system is configured as follows.
That is, an information processing system including an information processing apparatus and a recording / reproducing apparatus each implemented with POSIX as an API, wherein the information processing apparatus performs information communication with the recording / reproducing apparatus. Processing device side communication means is provided.
Further, the recording / reproducing means provided in the recording / reproducing apparatus includes an open flag that adds a truncation flag with a value indicating validity and stores a value indicating writing in response to a data file writing instruction to a recording medium to be recorded. And an information processing device side control means for controlling the information processing device side communication means so that a file open request designating the file name of the data file instructed to be written is sent to the recording / reproducing device.
The recording / reproducing apparatus includes a recording / reproducing apparatus-side communication unit that performs data communication with the information processing apparatus.
Further, a recording / reproducing means for recording / reproducing data on / from the recording medium is provided.
In addition, when a file open request is received by the recording / reproducing apparatus-side communication means, whether or not the file open request instructs to write a required data file based on the open flag included in the file open request. If it is determined that the file open request is an instruction to write, a data file having the same file name as the file name specified by the file open request is stored in the recording medium. If it is determined whether or not a data file having the same file name is recorded as a result of the determination, it is further determined whether or not the truncation flag in the open flag is a valid value. If the truncation flag is determined to be valid as a result of this determination Only, in which a recording and reproducing apparatus side control unit that executes processing according to the file open request.

In the present invention, the recording / reproducing apparatus is configured as follows.
That is, a recording / reproducing apparatus in which POSIX is implemented as an API, first, includes a communication unit that performs data communication with an external device, and a recording / reproducing unit that performs recording and reproduction of data with respect to a recording medium.
Further, when a file open request from an external device is received by the communication means, whether or not the file open request is an instruction to write a required data file based on the open flag included in the file open request. If it is determined that the file open request is an instruction to write, a data file having the same file name as the file name specified by the file open request is further recorded. If the data file with the same file name is recorded as a result of this determination, the truncation flag in the open flag is a value indicating validity. As a result of the determination, the truncation flag is a value indicating validity. Only when it is, and that a control means for executing processing in accordance with the file open request.

In the present invention, the information processing apparatus is configured as follows.
That is, a recording / reproducing apparatus side communication unit configured to include an information processing apparatus and a recording / reproducing apparatus each implemented with POSIX as an API, and the recording / reproducing apparatus performs data communication with the information processing apparatus; When a file open request is received by the recording / reproducing means for recording / reproducing data with respect to the recording medium and the recording / reproducing apparatus-side communication means, the file open request is determined based on the open flag included in the file open request. It is determined whether or not the data file is instructed to be written. If it is determined that the file open request is to instruct writing, the file name specified by the file open request is determined. It is determined whether a data file with the same file name is recorded on the recording medium. If the data file having the same file name is recorded as a result of the determination, it is further determined whether or not the truncation flag in the open flag is a value indicating validity. Only when the truncation flag is a value indicating validity, a recording / playback apparatus-side control unit that executes processing according to the file open request;
An information processing apparatus in an information processing system comprising:
First, information processing apparatus side communication means for performing data communication with the recording / reproducing apparatus is provided.
In addition, in response to an instruction to write a data file to a recording medium to be recorded by the recording / playback unit included in the recording / playback apparatus, a truncation flag with a value indicating validity is added and an open flag storing a value indicating writing is set. And an information processing apparatus side control means for controlling the information processing apparatus side communication means so that a file open request designating a file name of the data file for which writing has been instructed is made to the recording / reproducing apparatus. I made it.

According to the present invention, when a recording / playback apparatus that performs recording / playback on a recording medium receives a file open request for a required data file from an external apparatus such as the information processing apparatus, the file open request To determine whether or not the file open request is an instruction to overwrite the required data file recorded on the recording medium. Has been.
If it is determined that the file open request is an overwrite instruction, it is determined whether or not the truncation flag is a valid value. That is, by determining whether the truncation flag is valid / invalid in this way, it is possible to determine whether or not deletion of a file to be overwritten (for example, a base clip) recorded on the recording medium is guaranteed. In other words, the recording / reproducing apparatus determines whether the received file open request indicates partial overwriting or overall overwriting by determining the truncation flag. Is something that can be done.
Therefore, the processing according to the file open request is executed only when the truncation flag is valid as described above, so that it is an overall overwrite instruction that the truncation flag is valid. In such a case, the entire overwriting can be permitted by performing processing according to the file open request. Conversely, if the truncation flag is invalid and a partial overwrite instruction is given, processing according to the file open request will not be performed, thereby disallowing partial overwrite. Can do.

In this way, in the present invention, the recording / reproducing apparatus determines whether the deletion of the underlying file is guaranteed by determining whether the truncation flag included in the file open request is valid, and based on the determination result, By determining whether or not to execute processing according to the open request, it is possible to make a file open request designating overwriting and to disallow partial overwriting.
In other words, in the past, by allowing only “delete” and “new write” from the external device side on the recording / reproducing device side, and not accepting file open requests to instruct overwriting, partial data file However, in the present invention, when partial overwriting is not permitted, a file open request designating overwriting as described above can be accepted.
According to this, in order to cause the recording / reproducing apparatus to execute overwriting of the data file, conventionally, two actions of an instruction to delete the data file and an instruction to newly write the data file on the external apparatus side such as an information processing apparatus are performed. Can be executed with a single action of only an overwrite instruction.

  In this way, under the condition that partial overwriting is not permitted, overall overwriting can be realized with only one action, so that the processing load required on the external apparatus side such as an information processing apparatus is correspondingly increased. Can be reduced. Further, the user's operation burden can be reduced by that amount, thereby improving the efficiency of editing work.

Hereinafter, the best mode for carrying out the invention (hereinafter referred to as an embodiment) will be described.
<First Embodiment>
[System Overview]

FIG. 1 shows an overview of an information processing system (editing system 1) according to a first embodiment as an embodiment of the information processing system of the present invention.
In FIG. 1, an editing system 1 is a business editing system particularly suitable for production of AV (Audio Visual) content such as a television broadcast program. The editing system 1 includes at least a recording / reproducing apparatus 2, a personal computer 3, and an optical disc D so as to be surrounded by a broken line in the drawing. In this case, the personal computer 3 corresponds to the information processing apparatus according to the present invention, and the recording / reproducing apparatus 2 corresponds to the recording / reproducing apparatus according to the present invention. The optical disc D corresponds to a recording medium.

  In the editing system 1, the recording / reproducing apparatus 2 performs recording / reproduction with respect to the optical disc D. In the recording / reproducing apparatus 2, for example, video data (material image) photographed by the external camera device 4 is input and can be recorded on the optical disk D loaded therein.

The recording / playback apparatus 2 compares the video data as the material video recorded on the optical disc D in this way, for example, by extracting the predetermined scene and editing it into a video file called a video clip. Simple editing is possible. As will be described later, the recording / reproducing apparatus 2 has an output terminal for a video reproduced from the optical disc D, and the user performs an editing operation while checking the video on an external display device such as the display 5 shown in the figure, for example. It is possible.
The recording / reproducing apparatus 2 can also write back the video clip generated by editing to the optical disc D.

Further, in the editing system 1 in this case, for example, the video clip recorded on the optical disc D as described above can be edited using the personal computer 3 in the drawing.
In this case, the personal computer 3 instructs the recording / playback apparatus 2 to read out / transfer the video clip recorded on the optical disc D, thereby performing various editing processes on the video clip transferred from the recording / playback apparatus 2 side. be able to.
In addition, the personal computer 3 can write back the video clip subjected to the editing process in this manner to the optical disc D by instructing the recording / reproducing apparatus 2.

Here, in recent years, electronic devices called information home appliances such as the recording / reproducing apparatus 2 in such an editing system 1 have an OS (Operating System) so as to ensure high compatibility with external devices. There are those adopting UNIX. When UNIX is used as an OS in this way, POSIX (Portable Operating System Interface for UNIX) is adopted as an API (Application Programming Interface) between each upper application layer. As is well known, POSIX is a UNIX standard API standard established by IEEE (Institude of Electrical and Electronics Engineers).
Hereinafter, description will be continued assuming that the recording / reproducing apparatus 2 and the personal computer 3 adopt POSIX as the API in the editing system 1 of the present embodiment.

[Configuration of recording / reproducing apparatus]

FIG. 2 is a block diagram showing an internal configuration of the recording / reproducing apparatus 2 shown in FIG.
First, also in this figure, the optical disk D shown in FIG. 1 is shown. The optical disc D is an optical disc recording medium such as a DVD (Digital Versatile Disc) or a Blu-ray Disc (Blu-ray: registered trademark), and as understood from the description of FIG. It is assumed that video data or the like based on video captured by the camera device 4 is recorded.

  Here, for reference, the optical disc D to which the recording / reproducing apparatus 2 of the embodiment corresponds is described in detail. For example, recording / reproduction is performed with a laser wavelength λ = 405 nm and NA (numerical aperture) = 0.65. In other words, the recording film has a phase change film so that data can be rewritten. The recording capacity is about several tens GB (gigabytes), which is a relatively large capacity, so that it can cope with high-resolution images for business use.

The recording / reproducing apparatus 2 is provided with a disk drive 9 for performing an actual recording / reproducing operation on such an optical disk D.
The disk drive 9 has a configuration for recording / reproducing data recorded on the optical disk D loaded therein, an optical head, a spindle motor, a servo circuit, a decoder for obtaining reproduction data, and recording data generation. It is configured with an encoder for.
Video data reproduced from the optical disk D by the disk drive 9 is supplied to the signal processing unit 10 shown in the figure. In addition, video data to be recorded on the optical disk D is input from the signal processing unit 10 to the disk drive 9.

The signal processing unit 10 is configured to be able to perform various video signal processing for video data and various audio signal processing for audio data.
The signal processing unit 10 can input video data from a video input terminal TVin shown in the figure. As a result, the recording / reproducing apparatus 2 can directly input video data captured by the external camera apparatus 4.
The signal processing unit 10 can input audio data from an audio input terminal TAin shown in the figure.

Further, the signal processing unit 10 creates a data file called a video clip so as to cut out a part of the video data as the material video recorded on the optical disc D based on an instruction from a CPU (Central Processing Unit) 11 described later. It is possible to perform an editing process such as generating or combining a plurality of video clips into a series of video data. The video clip generated by such editing processing is written back to the optical disc D under the control of the CPU 11.
In this case, the signal processing unit 10 generates a data file as the video clip in a file format called a so-called MXF (Material eXchange Format) file.

  Further, a video output terminal TVout and an audio output terminal TAout are connected to the signal processing unit 10 as shown in the figure. Thus, video data and audio data can be output to an external display 5 as shown in FIG. 1, for example.

The CPU 11 performs overall control and arithmetic processing of the recording / reproducing apparatus 2 based on the activated program. For example, an operation corresponding to an operation input from the operation unit 15 shown in the figure, a recording / reproducing operation, an access operation, and the like for the optical disc D loaded in the disc drive 9 are controlled.
Also, processing for data communication with an external device via a USB (Universal Serial Bus) interface 17 described later is performed. Furthermore, based on an operation input from the operation unit 15, the signal processing unit 10 is controlled to execute an editing process (for example, generation of a video clip) on video data recorded on the optical disc D. it can.
As shown in the figure, the CPU 11 exchanges various control signals and data with the signal processing unit 10 and the USB interface 17 via the bus 16.

The CPU 11 includes a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, and a nonvolatile memory 14 as shown in the figure.
The ROM 12 stores an operation program for the CPU 11, a program loader, and the like. Particularly in the case of the present embodiment, the ROM 11 also stores an overwrite control program 12a for causing the CPU 11 to execute a processing operation (FIG. 5) for realizing an operation as a first embodiment to be described later. Is done.

Further, the RAM 13 temporarily secures a data area and a task area when the CPU 11 executes the program.
The nonvolatile memory 14 is a nonvolatile memory that can rewrite data and retain recorded data even after the power is turned off. The nonvolatile memory 14 stores, for example, various calculation coefficients, parameters used in the program, and the like.

The operation unit 15 includes various operators provided on the housing surface of the recording / reproducing apparatus 2.
The operation unit 15 supplies operation information (operation signal) for each operator to the CPU 11. The CPU 11 executes a processing operation according to the operation information from the operation unit 15, thereby realizing an operation according to a user instruction.

  The USB interface 17 is provided to perform data communication with an external device (in particular, the personal computer 3 shown in FIG. 1 in this case) connected via a USB cable connected to the illustrated USB terminal Tusb. . In particular, via the USB interface 17 in this case, a file open request from the personal computer 3 side and an exchange of a data file as an edited video clip are performed as described later.

  In FIG. 2, the USB interface is adopted as a communication interface for performing data communication between the recording / reproducing apparatus 2 and an external apparatus (particularly the personal computer 3). For example, another interface such as IEEE (the Institute of Electrical and Electronic Engineers) 1394 may be used as a communication interface between the personal computer 3 and the personal computer 3. Alternatively, in addition to wired communication, for example, wireless communication such as Bluetooth (registered trademark) can be performed.

[Configuration of information processing device]

FIG. 3 is a block diagram showing an internal configuration of the personal computer 3 shown in FIG.
In FIG. 3, first, the CPU 21 performs overall control and arithmetic processing of the personal computer 3 based on the activated program. For example, an input / output operation for a user, storage of a data file in an HDD (Hard Disc Drive) 30, creation / update of management information, and the like are performed.
The CPU 21 exchanges control signals and data with each unit via the illustrated bus 31.

The memory unit 22 comprehensively shows ROM, RAM, flash memory, and the like used by the CPU 21 for processing.
The ROM in the memory unit 22 stores an operation program for the CPU 21, a program loader, and the like. The flash memory in the memory unit 22 stores various calculation coefficients, parameters used in the program, and the like.
Further, the RAM in the memory unit 22 temporarily secures a data area and a task area for executing the program.

  The USB interface 23 is provided to perform data communication with an external device (in this case, the recording / reproducing device 2) connected via a USB cable connected to a USB terminal Tusb shown in the figure.

  In the HDD 30, data files are stored and management information is created / updated based on the control of the CPU 21 as described above. For example, a data file as a video clip transferred from the recording / reproducing apparatus 2 via the USB interface 23 can be stored in the HDD 30. In addition, a data file taken from a required medium by a media drive 29 described later can be stored in the HDD 30.

  The HDD 30 can store programs for the personal computer 3 to realize various functions. In particular, in the case of the present embodiment, a PC-side program 30a for causing the CPU 21 to execute a processing operation (FIG. 5) for realizing an operation as an embodiment described later is stored.

  Also, the editing application 30b shown in the figure is stored in the HDD 30. As described above with reference to FIG. 1, in the editing system 1 according to the present embodiment, the personal computer 3 causes the data file as a video clip recorded on the optical disc D to be transferred from the recording / playback apparatus 2 and the transferred video. It is possible to perform an editing process on a clip. The editing application 30b is an application program for realizing various editing processes for video clips in such a personal computer 3.

  The input unit 25 is a keyboard or mouse (not shown) provided in the personal computer 3 or a remote commander or other input device, and the user inputs various operations and data. The information input by the input unit 25 is subjected to predetermined processing by the input processing unit 24 and is transmitted to the CPU 21 as an operation or data input. The CPU 21 performs necessary calculations and controls corresponding to the input information.

  The media drive 29 is, for example, a CD (Compact Disc), an MD (Mini Disc: magneto-optical disc), a CD-R (Recordable), a CD-RW (ReWritable), a DVD, a DVD-R, a DVD-RW, or a Blu-ray Disc. Is a drive function unit corresponding to a recording medium (media) such as an optical disk recording medium or a memory card (semiconductor memory device as a removable medium), and is configured to be able to perform recording and reproduction operations on these media . For example, when the medium corresponds to an optical disk recording medium, the media drive 29 includes, for example, an optical head, a spindle motor, a reproduction signal processing unit, a servo circuit, and the like.

  The drive control unit 28 controls a recording / reproducing operation, an access operation, and the like for the media loaded in the media drive 29. For example, when the user performs a playback operation on the loaded media via the input unit 25, the CPU 21 instructs the drive control unit 28 to play the media. Then, the drive control unit 28 performs control for causing the media drive 29 to execute an access operation and a reproduction operation. The media drive 29 transfers the read reproduction data to the drive control unit 28 and sends it to the bus 31.

The display 27 is a display device such as a liquid crystal display, for example, and displays various information to the user.
For example, when the CPU 21 supplies display information to the display processing unit 26 according to various operation states, input states, and communication states, the display processing unit 26 drives the display 27 based on the supplied display data to execute the display operation. Let
When video data is reproduced from the media loaded in the media drive 29 or from the HDD 30, the display processing unit 26 controls the display 27 based on the reproduction data to display an image. Make it.

  Here, in the personal computer 3 having such a configuration, the CPU 21 instructs the recording / reproducing apparatus 2 via the USB interface 23 to read a video clip recorded on the optical disc D loaded in the recording / reproducing apparatus 2. This can be transferred to the personal computer 3 side. Then, an editing process using the editing application 30b can be performed on the video clip transferred in this way.

[Operation as First Embodiment]

In the editing system 1 as described above, the personal computer 3 can transfer the video clip recorded on the optical disc D loaded on the recording / reproducing apparatus 2 side, and perform the editing process on the video clip. For an edited video clip obtained by such editing processing, a write instruction is given to the recording / reproducing apparatus 2 based on an operation input via the input unit 25, for example, as will be described later, and this is recorded on the optical disc. D can be written back.

  Here, assuming such a series of editing operations, a video clip (video clip before editing) that is the basis of editing processing in the personal computer 3 is recorded on the optical disc D. The recording / reproducing apparatus 2 and the personal computer 3 are in a state in which video clips having the same file name but different data contents are held. In such a state, when the edited video clip is written back to the optical disc D from the personal computer 3 side as described above, the write back processing is performed by using the same file name recorded on the optical disc D. Overwriting processing for the video clip (background clip).

At this time, particularly when the MXF file format is adopted as the video clip as in the present embodiment, the overwriting process for the video clip having the same file name as described above is permitted, Partial overwriting is not allowed.
In other words, as described above, in the MXF file, each data such as video data is stored in a state of being separated according to a predetermined format rather than in chronological order. If the overwriting is permitted, the process of specifying the part to be overwritten becomes complicated, and the process for securing the time-series connection after overwriting becomes complicated, resulting in processing This is because time and processing burden increase, and the usefulness of the system may be impaired.

  For this reason, conventionally, in order to allow overwriting of the entire file as described above but partial overwriting is impossible, when a video clip with the same file name is already on the optical disc D, Only the “deletion” is permitted on the recording / reproducing apparatus 2 side.

In this way, when there is a base clip having the same file name as the edited clip on the optical disc D, the personal computer 3 side must first delete the base clip. If the base clip having the same file name is deleted as described above, the file open request designating “write” is not disallowed. A file open request designating “write” is made to the recording / reproducing apparatus 2 side, and the edited clip can be newly written to the optical disc D.
As a result, the entire clip can be overwritten, and on the other hand, the deletion of the base file is guaranteed as described above, so that the partial overwriting cannot be performed.

However, according to such a conventional method, the entire clip is overwritten, and the personal computer 3 has to perform two actions: an instruction for deleting the base clip and a new writing instruction for the edited video clip. It will be necessary.
According to this, since two actions are necessary for what is essentially only one action for overwriting, the processing load on the personal computer 3 side is increased accordingly. In fact, since the personal computer 3 gives these instructions based on user operations, this increases the operation burden on the user. When the operation burden on the user increases in this way, the efficiency of editing work is deteriorated.

Therefore, the editing system 1 according to the present embodiment makes it possible to perform partial overwriting in one action for overwriting of the entire clip after disabling partial overwriting due to the above circumstances.
The operation performed by the editing system 1 for realizing this will be described with reference to FIG.

FIG. 4 is a diagram schematically showing an operation performed by the editing system 1 as the first embodiment. In FIG. 4, it is assumed that the recording / reproducing apparatus 2 and the personal computer 3 are already connected via a USB cable so that data communication is possible.
First, on the personal computer 3 side, for example, when the editing of the video clip recorded on the optical disk D transferred from the recording / reproducing apparatus 2 side as described above is completed, the video clip is written on the optical disk D. Will return. Such an instruction for writing back is performed based on an operation input via the input unit 25, for example.
For example, when an instruction to write a required video clip to the optical disc D based on such an operation input is given, the personal computer 3 side writes the video clip as shown in <1> in the figure. In response to the insertion instruction, Open Flag = WR, Truncate Flag = valid, and a file open request including the file name of the video clip instructed to be written is made.

  Here, for confirmation, the file open request is a command for requesting execution of a file open process for a required data file. The file open process is a process to be performed first when reading / writing a data file.

  In such a file open request, the data file to be subjected to the file open process is specified by the file name information included therein. In particular, the file open request in POSIX includes the “Open Flag” as described above.

This Open Flag is a flag for specifying the details of the operation at the time of opening the file, and the following definition is made in POSIX.
・ O_RDONLY: Read only (Read instruction)
・ O_WRONLY: Write only (write instruction)
O_RDWR: for reading and writing Further, the “Truncate Flag” as described above can be added to the Open Flag as a selection flag.
This Truncate Flag is a flag for instructing to cut the file size of the designated data file to “0” after the file open permission / non-permission determination. In POSIX, it is defined as O_TRUNC, and is used together when Open Flag = O_WRONLY or O_RDWR.

  In the personal computer 3, as an operation of <1> above, a truncation flag with a value corresponding to O_TRUNC (a value indicating validity) is added in response to an instruction to write a video clip, and it corresponds to O_WRONLY A file open request including the open flag storing the value and including the file name of the video clip instructed to write is designated to the recording / reproducing apparatus 2 side.

On the recording / reproducing apparatus 2 side, when a file open request is received from such a personal computer 3 side, as shown in <2> in the figure, if the file open request indicates writing, Whether or not a clip with the same file name exists is determined.
That is, first, by referring to the Open Flag included in the file open request and determining whether the value is either O_WRONLY or O_RDWR meaning writing, the file open request is written. It is determined whether or not it is an instruction. If the file open request is an instruction to write, it is determined whether or not a video clip having the same file name as the file name specified by the file open request is recorded on the optical disc D. To do.

  If it is determined that a video clip with the same file name has been recorded on the optical disc D, the validity / invalidity of the Truncate Flag is determined as shown in <3> below. That is, if the clip having the same file name is found on the optical disc D in this way and the file open request is found to be an instruction to overwrite the existing base clip, the Truncate Flag is valid. / Invalidity is determined.

Here, if the Truncate Flag is a valid value, the process according to the Truncate Flag is subsequently executed on the recording / reproducing apparatus 2 side, so that the file size of the existing base clip on the optical disc D is “0”. Will be truncated. That is, if the value of the Truncate Flag indicates validity as described above, the deletion of the existing base clip is guaranteed.
As a result, if it is determined that the Truncate Flag is a valid value as a result of the determination in <3> above, the base clip is deleted and a new video clip is created as shown in <4> below. To be included.
Specifically, in accordance with the Truncate Flag value in the file open request, a process for truncating the file size of the video clip having the same file name recorded on the optical disc D to “0” is performed, and the base clip is deleted. To be done. Then, in response to the fact that the Open Flag in the file open request in this case is a value indicating writing, first, the personal computer 3 is instructed to transfer a video clip (edited video clip) that has been instructed to be written. Then, a new writing process is performed on the optical disc D of the video clip transferred accordingly.

  In this way, when the deletion of the background clip is guaranteed based on the determination result based on the value of the Truncate Flag, the deletion of the background clip and the video clip instructed to write are processed as processing corresponding to the file open request. A new writing process is performed. That is, in this way, when deletion of the base clip is guaranteed based on the determination result based on the value of the Truncate Flag, an overwrite file open request by a write instruction specifying the same file name is permitted. As a result, the entire video clip can be overwritten.

On the other hand, if the value of the Truncate Flag is a value indicating invalidity, the file open request is not permitted as an invalid command as shown in <5>. Specifically, error notification is performed from the recording / reproducing apparatus 2 side to the personal computer 3 side, and thereafter, processing according to the file open request is not executed. In other words, the video clip instructed to be written is not written to the optical disc D.
In this way, when the Truncate Flag is invalid and the deletion of the underlying file is not guaranteed, the file open request is not allowed, thereby preventing partial overwriting. .

If it is determined in <3> above that a video clip having the same file name as the file name instructed by the file open request from the personal computer 3 side is not recorded on the optical disc D, the recording / playback apparatus 2 A normal new writing process is executed.
That is, when a video clip having the same file name is not found on the optical disc D in this way, the file open request does not indicate overwriting, so there is no need to impose restrictions on overwriting. For this reason, in response to the file open request, a new writing process to the optical disc D is executed for the video clip having the file name indicated thereby. Specifically, the personal computer 3 is instructed to transfer a video clip having the file name (that is, the video clip instructed to write by <1>), and the video clip transferred in response to the instruction is transferred to the optical disc D. New writing.

As described above, in the editing system 1 of the present embodiment, the Open Flag indicates writing as a file open request transmitted from the personal computer 3 side to the recording / reproducing apparatus 2 side, and the specified file name and When a video clip with the same file name is on the optical disc D, and the file open request is an instruction to overwrite the base clip recorded on the optical disc D, the open flag of the file open request It is configured to determine whether the Truncate Flag included therein is valid or invalid. Then, in accordance with the validity / invalidity of the Truncate Flag, it is determined whether or not the process corresponding to the file open request is to be executed (that is, whether or not the file open request is permitted).
Specifically, if the Truncate Flag indicates that it is valid, the file opening is permitted, the file size is truncated (file deletion), and the new writing process of the video clip instructed to be written I do.
When the Truncate Flag does not indicate validity (indicates invalidity), an error notification is sent to the personal computer 3 side to prohibit file opening.

With this operation, if the file open request indicates overwriting, the Truncate Flag is valid, that is, the deletion of the underlying clip is guaranteed and the file open request indicates overall overwriting. The file open request can be granted only if it is determined to exist. On the other hand, if the Truncate Flag is invalid, that is, if deletion of the underlying clip is not guaranteed and the file open does not indicate an overall overwrite, the file open request is not permitted. It can be.
As a result, partial overwriting is not permitted, but overall overwriting can be permitted.

In this embodiment, the recording / playback apparatus 2 allows the Open Flag, the specified file name, Truncate included in the file open request to permit the entire overwriting but not the partial overwriting. This is realized by performing discrimination based on Flag.
In other words, this enables the personal computer 3 to make a file open request instructing overwriting, which has been prohibited in the past. As a result, when the recording / playback apparatus 2 executes the overall overwriting of the video clip, the personal computer 3 only needs to make a file open request for designating such overwriting. It can be realized only by action.

  In this way, under the condition that partial overwriting is not permitted, overall overwriting can be realized with only one action on the personal computer 3 side, thereby reducing the processing burden on the personal computer 3 side. In addition, the user's operation burden can be reduced accordingly. If the operation burden on the user can be reduced in this way, the efficiency of editing work performed using the personal computer 3 can be improved.

[Processing operation]

FIG. 5 is a flowchart showing the processing operation to be performed in the editing system 1 in order to realize the operation as the first embodiment described above.
In FIG. 5, the processing operation shown on the recording / reproducing apparatus side is executed by the CPU 11 shown in FIG. 2 based on the overwrite control program 12a stored in the ROM 12, and the processing shown on the personal computer side. The operation is executed by the CPU 21 shown in FIG. 3 based on the PC side program 30 a stored in the HDD 30.

  In FIG. 5, the personal computer 3 first waits for a clip writing instruction in step S101 in the figure. That is, it waits for an instruction to write a video clip to the optical disc D, which is loaded into the recording / reproducing apparatus 2 connected so as to be capable of data communication via a USB cable.

  Here, according to the above description, the writing instruction to the optical disc D is assumed to be a case where the video clip that has been subjected to the editing process by the editing application 30b is written back. In such a case, the writing instruction itself from the user is accepted by the editing application 30b. In this case, as the processing in step S101, for example, the editing application 30b sends to the OS side according to the writing instruction. This is a process of waiting for a predetermined notification (command) to be performed.

If it is determined in step S101 that a clip writing instruction has been issued, the process advances to step S102 to make a file open request including Open Flag = WR, Truncate Flag = valid and including the writing instruction file name. .
In step S102, information on the file name of the video clip instructed to be written is first acquired. For example, in this case, an instruction is given to the editing application 30b to acquire information on the file name of the video clip instructed to write.
In addition, a truncation flag with a value corresponding to O_TRUNC (a value indicating validity) is added, an open flag storing a value corresponding to O_WRONLY is stored, and the write instruction file name obtained as described above is stored. And make a file open request specifying the file name. Specifically, control processing is performed so that such a command as a file open request is transmitted to the recording / reproducing apparatus 2 side via the USB interface 23.
When the process of step S102 is executed, the process proceeds to step S103 described later.

  The recording / playback apparatus 2 side waits for reception of such a file open request from the personal computer 3 side in step S201. If a file open request is received, first, in step S202, a determination process is performed as to whether or not the Open Flag indicates writing. That is, referring to the value of the Open Flag included in the received file open request, it is determined whether the value is either O_WRONLY or O_RDWR meaning writing, so that the file open request Is instructed to write.

  If it is determined in step 202 that the Open Flag does not instruct writing, and a negative result is obtained, the process proceeds to step S209 to perform the corresponding process. For example, when the Open Flag is O_RDONLY, a process according to the contents of the Open Flag is executed, such as a process of reading the corresponding file.

On the other hand, if an affirmative result is obtained in step S202 that the Open Flag instructs writing, the process proceeds to step S203 to determine whether there is a clip with the same file name. In other words, based on the result of collating the file name of the video clip recorded on the optical disc D with the file name specified by the received file open request, it is determined whether or not there is a video clip with a matching file name. I do.
In this case, the file name information of the video clip recorded on the optical disc D is stored in the RAM 13 or the non-volatile memory 14 in advance, for example, by the disk drive 9, and the file name and the file open request are received. It is only necessary to check against the specified file name. Or, normally, when the optical disk D is loaded, the management information read from the optical disk D is stored in the RAM 13 or the non-volatile memory 14, so in such a case The file name information of each video clip included in the management information can be used for collation.

If a negative result is obtained in step S203 that there is no clip with the same file name, the process proceeds to step S206 as shown in the drawing, a write instruction clip transfer request (S206), a new write process (S207), A write end notification (S208) is executed.
As a result, processing for new writing is executed in response to a case where the received file open request is not an instruction to overwrite an existing clip but an instruction to perform a new writing. It will be a thing. The processing contents of steps S206 to S208 will be described later.

On the other hand, if a positive result is obtained in step S203 that there is a clip with the same file name, a determination process is performed in step S204 as to whether the Truncate Flag is valid.
If a negative result is obtained in step S204 that the Truncate Flag is not a valid value, the process proceeds to step S210, where an error is notified to the personal computer 3 side, and “RETURN” is displayed. In this way, when the Truncate Flag is invalid and the file open request is not an instruction for overall overwriting, the processing according to the file open request is not performed.
The process on the personal computer 3 side in response to the error notification in step S210 will be described later.

If a positive result is obtained in step S204 that the Truncate Flag is valid, the process proceeds to step S205, and the deletion process of the clip with the same file name is executed. That is, based on the Truncate Flag value in this case, a process for truncating (deleting) the file size of the video clip having the file name designated by the file open request to “0” is executed.
Note that such deletion processing may be processing for instructing the disk drive 9 to actually delete the video clip of the same file name recorded on the optical disk D, or that the video clip has been deleted. Only the management information recorded on the optical disc D may be updated so as to be handled.

  In a succeeding step S206, a transfer request for a write instruction clip is made. That is, control processing is performed so that a transfer request is transmitted to the personal computer 3 side via the USB interface 17 with respect to the video clip instructed to be written on the personal computer 3 side.

Here, on the personal computer 3 side, either of the transfer request from the recording / reproducing apparatus 2 side or the error notification in step S210 described above is received in steps S103 and S104 shown in the figure. It is made to wait by the loop processing by.
If a transfer request from the recording / reproducing apparatus 2 is received and an affirmative result is obtained in step S103, the process proceeds to step S105 as shown in FIG. That is, the control process is executed so that the video clip instructed to be written is transferred to the recording / reproducing apparatus 2 via the USB interface 23.

On the personal computer 3 side, if an error notification is received from the recording / reproducing apparatus 2 side, and if a positive result is obtained in step S104, the process proceeds to step S107 to perform error processing. The As this error process, for example, a process for notifying the user of an error, such as a process for displaying an error message on the display 27, may be executed.
When the process of step S107 is executed, “RETURN” is obtained as illustrated.

On the recording / reproducing apparatus 2 side, in step S207 following the transfer request process in the previous step S206, a new writing process is executed for the video clip transferred from the personal computer 3 side in this way. That is, in step S207, control processing is executed so that the video clip transferred from the personal computer 3 side in step S105 described above and received by the USB interface 17 is recorded on the optical disc D.
In this case, the recording of the video clip may be performed while receiving the video clip transferred from the personal computer 3 side, or may be performed after the reception of the video clip is completed.

  In a succeeding step S208, a writing end notification to the personal computer 3 is made. That is, the personal computer 3 is notified that the writing of the video clip transferred as described above has been completed. When the process of step S208 is executed, “RETURN” is obtained as shown in the figure.

On the personal computer 3 side, it waits in step S106 following the previous step S105 to receive such a writing end notification from the recording / reproducing apparatus 2 side. When a write end notification is received, “RETURN” is displayed as shown.

<Second Embodiment>
[System Overview]

Next, the editing system 40 according to the second embodiment will be described.
FIG. 6 shows an overview of the editing system 40.
In the editing system 40 of the second embodiment, as a recording / reproducing apparatus for recording / reproducing an optical disc D, a recording / reproducing apparatus in which a network communication function is added to the recording / reproducing apparatus 2 in the first embodiment. 8 is used. In this case, the recording / reproducing apparatus 8 can perform data communication with the editing apparatus 7 having the network communication function via the network 6 such as Ethernet.

  The editing device 7 is an editing device capable of relatively advanced editing processing, such as a non-linear editor, for example. Like the personal computer 3, the editing device 7 is an optical disc D loaded in a recording / reproducing device 8 connected so as to be capable of data communication. The recorded video clip can be transferred to itself, the transferred video clip can be edited, and the edited video clip can be written back to the optical disc D.

In this case, the editing device 7 instructs the recording / playback device 8 to transfer the video clip recorded on the optical disc D, and writes the edited clip to the optical disc D, such as writing back the edited clip. Is written using an FTP (File Transfer Protocol) command.
Specifically, when instructing transfer of a predetermined video clip recorded on the optical disc D, a GET command specifying the file name of the video clip is transmitted to the recording / reproducing apparatus 8. Further, when instructing writing of a predetermined video clip to the optical disk D, a PUT command designating the file name is transmitted to the recording / reproducing apparatus 8.

  In the second embodiment, on the recording / reproducing apparatus 8 side, the clip writing instruction by the FTP command performed from the external apparatus via the network 6 can be appropriately handled in this way.

[Configuration of editing device]

FIG. 7 is a block diagram showing an internal configuration of the editing device 7 shown in FIG.
In FIG. 7, first, the CPU 41 performs overall control and arithmetic processing of the editing apparatus 7 based on the activated program. For example, input / output operations for the user, storage of data files in the HDD 48, creation / update of management information, and the like are performed.
The CPU 41 exchanges control signals and data with each unit via a bus 50 shown in the figure.

The memory unit 42 comprehensively shows ROM, RAM, flash memory, and the like used by the CPU 41 for processing.
The ROM in the memory unit 42 stores an operation program for the CPU 41, a program loader, and the like. The flash memory in the memory unit 42 stores various calculation coefficients, parameters used in the program, and the like.
Furthermore, a data area and a task area for executing a program are temporarily secured in the RAM in the memory unit 42.

The network interface 43 is connected to the network 6 shown in FIG. 6 via a network terminal Tnt shown in the figure, and performs data communication with an external device connected via the network 6.
The network interface 43 performs transmission data encoding processing and reception data decoding processing based on the control of the CPU 41. The encoded transmission data is transmitted to a predetermined external device (in particular, the recording / reproducing device 8 in this case) via the network 6. In addition, data transmitted from an external device such as the recording / reproducing device 8 via the network 6 is received and transferred to the CPU 41.

  In the HDD 48, data files are stored and management information is created and updated under the control of the CPU 41 as described above. For example, a data file as a video clip transferred from the recording / reproducing apparatus 8 via the network interface 43 can be stored in the HDD 48.

  The input unit 45 is a keyboard, a mouse, a remote commander, or other input devices (not shown) provided in the editing apparatus 7, and the user performs various operation inputs and data inputs. The information input by the input unit 45 is subjected to predetermined processing by the input processing unit 44 and is transmitted to the CPU 41 as an operation or data input. The CPU 41 performs necessary calculations and controls corresponding to the input information.

The display 47 is a display device such as a liquid crystal display, and displays various information to the user.
For example, when the CPU 41 supplies display information to the display processing unit 46 according to various operation states, input states, and communication states, the display processing unit 46 drives the display 47 based on the supplied display data to execute the display operation. Let
For example, when video data is reproduced from the HDD 48, the display processing unit 46 drives and controls the display 47 based on the reproduced data to display a video.

  Further, the editing device 7 is provided with an editing processing unit 49 shown in the figure. The editing processing unit 49 performs various signal processing on the video clip based on the control of the CPU 41, thereby performing editing processing on the video clip.

As described above, in the editing device 7 shown in this figure, for example, when the editing processing by the editing processing unit 49 is performed, a video clip recorded on the optical disk D loaded in the recording / reproducing device 8 is transferred. In the case of instructing the writing of the video clip to the optical disc D such as when the video clip after the editing process is written back to the optical disc D, an instruction using the FTP command is performed.
That is, if the recording / playback apparatus 8 is instructed to transfer a predetermined video clip recorded on the optical disc D based on a user operation or the like via the input unit 45, the CPU 41 stores the file name of the video clip. A process for transmitting a GET command designating “” to the recording / reproducing apparatus 8 is executed. Thereby, the GET command is transmitted to the recording / reproducing apparatus 8 connected via the network 6.
In addition, when an instruction is given to write a predetermined video clip held by the editing device 7 on the optical disc D based on a user operation or the like via the input unit 45, a PUT command specifying the file name Is transmitted to the recording / reproducing apparatus 8, whereby the PUT command is transmitted to the recording / reproducing apparatus 8 connected via the network 6.

[Configuration of recording / reproducing apparatus]

FIG. 8 is a block diagram showing an internal configuration of the recording / reproducing apparatus 8 as the second embodiment shown in FIG.
In this figure, parts that are the same as those already described in FIG.
As shown in the figure, the recording / reproducing apparatus 8 of the second embodiment has a network interface 18, a network terminal Tnt, and a command conversion unit 19 as compared with the recording / reproducing apparatus 2 of the first embodiment. It has been added.

The network interface 18 is connected to the network 6 via a network terminal Tnt, and performs data communication with an external device connected via the network 6.
The network interface 18 performs transmission data encoding processing and reception data decoding processing based on the control of the CPU 11. The encoded transmission data is transmitted to a predetermined external device (in particular, the editing device 7 in this case) via the network 6. In addition, data transmitted from an external device such as the editing device 7 via the network 6 is received and transferred to the CPU 11.
The network interface 18 is connected to the CPU 11 via the bus 16 as shown.

The command conversion unit 19 is connected to the network interface 18 as shown in the figure, and monitors commands received by the network interface 18. As a result, when an FTP command is received from an external device, the FTP command is converted into a file open request corresponding to POSIX.
Specifically, when the PUT command specifying a predetermined file name is received by the network interface 18 as an FTP command from an external device, the command conversion unit 19 opens the PUT command as follows. Performs conversion to request.
In other words, a truncation flag with a value corresponding to O_TRUNC (a value indicating validity) is added, an open flag storing a value corresponding to O_WRONLY, and a file open including a file name specified by the received PUT command That translates to a request.

By such an operation of the command conversion unit 19, the network interface 18 in this case can supply a file open request corresponding to the command content to the CPU 11 instead of the FTP “PUT” command from the external device. it can.
As a result, according to the recording / reproducing apparatus 8 of the second embodiment, in the case of the previous first embodiment in response to an instruction by the FTP command from the editing apparatus 7 connected via the network 6. The overwriting control operation can be performed in the same manner as described above. That is, under the condition that partial overwriting is not permitted, an instruction to be performed on the external device (in this case, the editing device 7) side in realizing the entire overwriting is one action with only a writing (overwriting) instruction. Can only be.

Here, for confirmation, the operation performed by the command conversion unit 19 in this case will be described with reference to the flowchart of FIG.
First, in step S301, the network interface 18 waits for reception of an FTP “PUT” command from an external device. That is, it waits for reception of a PUT command specifying a required file name as an FTP command.

If such an FTP “PUT” command is received, in step S302, the received PUT command is set to Open Flag = WR, Truncate Flag = valid, and includes a “PUT” instruction file name. Convert to file open request.
That is, as described above, a truncation flag with a value indicating validity is added and an open flag storing a value corresponding to O_WRONLY is stored, and the file name specified by the received PUT command is stored and Converts to a file open request with a specified file name.

  For confirmation, the recording / reproducing apparatus 8 of the second embodiment also executes the overwrite control processing itself according to the overwrite control program 12a in the first embodiment. As in the case of the embodiment, it is possible to appropriately perform the overwriting control process in correspondence with an external device such as the personal computer 3 that directly makes a file open request corresponding to POSIX.

Here, in the second embodiment, since the configuration corresponding to the FTP command is exemplified as a command other than the file open request corresponding to POSIX, the command conversion unit 19 monitors the command received by the network interface 18. However, the present invention is not limited to this, for example, when it corresponds to other types of commands other than FTP commands.
For example, if the personal computer 3 is not POSIX compliant and issues an instruction such as writing with another predetermined type of command, the command conversion unit 19 monitors the command received by the USB interface 17. It can also be configured to. Specifically, when the predetermined type of command received from the external device received by the USB interface 17 is monitored and a command based on a write instruction specifying a required file name is received as the command, The command is converted into a file open request as described above.

In any case, the command conversion unit 19 that converts the predetermined command received by the communication means for performing data communication with the external device to the file open request is provided, so that the external device Even when a write instruction (overwrite instruction) is issued using a predetermined type of command other than a file open request that is not POSIX compliant, the recording / reproducing apparatus performs an appropriate overwrite control process in response to such a command. be able to.

<Modification>

Although the embodiments of the present invention have been described above, the present invention should not be limited to the embodiments described so far.
For example, in each embodiment, the case where the OS installed in the recording / reproducing apparatus (2, 8) is UNIX is exemplified, but other OS can be adopted as long as it is a POSIX-compliant OS.

Also, in the embodiment, the case where the recording / reproducing apparatus prohibits partial overwriting on all files instructed to be written from the external apparatus is exemplified. However, for example, partial overwriting such as an MXF file is performed. There is no need to restrict partial overwriting for files in other formats where there is no reason to disallow them.
For example, in the case where both a file that should not be allowed to be partially overwritten and a file that does not need to be prohibited are mixed, the recording / playback apparatus side sets the format of the file instructed to overwrite. Only when the file format is determined to be a format that should not allow partial overwriting in advance, the determination based on the Truncate Flag is performed to limit partial overwriting. It only has to be done.
Specifically, in the example shown in FIG. 5 above, for example, a determination process for such a file format is provided between steps S203 and S204, and the file needs to be partially overwritten. If it is determined, the process from step S204 is executed, and if it is determined that the file does not require partial overwriting restriction, the process according to the file open request may be executed. .

  In the embodiment, the case where the recording medium to be recorded by the recording / reproducing apparatus is an optical disk recording medium. However, the present invention is also applicable to the case where the recording medium is another recording medium such as an HDD or a semiconductor memory. It can be suitably applied.

  In the embodiment, the case where the data file to be overwritten is a video data file (or video / audio file) as a video clip is exemplified. However, the type of data file to be overwritten is controlled. Is not particularly limited.

  In the embodiment, the case where the information processing apparatus of the present invention is configured by a personal computer is exemplified, but an information processing apparatus other than the personal computer may be used.

It is a figure shown about the outline | summary of the information processing system of 1st Embodiment. It is a block diagram which shows the internal structure of the recording / reproducing apparatus of 1st Embodiment. It is a block diagram which shows the internal structure of the information processing apparatus of embodiment. It is a schematic diagram for demonstrating the operation | movement which the information processing system of 1st Embodiment performs. It is the flowchart shown about the processing operation which should be performed with the information processing system of 1st Embodiment. It is a figure shown about the outline | summary of the information processing system of 2nd Embodiment. It is a block diagram shown about the internal structure of the editing apparatus shown by FIG. It is a block diagram which shows the internal structure of the recording / reproducing apparatus of 2nd Embodiment. It is a flowchart for demonstrating the command conversion operation | movement performed by a command conversion part.

Explanation of symbols

  1,40 editing system, 2,8 recording / reproducing device, 3 personal computer, 4 camera device, 5 display, 7 editing device, 9 disk drive, 10 signal processing device, 11, 21,41 CPU, 12 ROM, 12a overwrite control Program, 13 RAM, 14 Non-volatile memory, 15 Operation unit, 16, 31, 50 Bus, 17, 23 USB interface, 18 Network interface, 19 Command conversion unit, 22, 42 Memory unit, 24, 44 Input processing unit, 25 , 45 input unit, 26, 46 display processing unit, 27, 47 display, 28 drive control unit, 29 media drive, 30, 48 HDD, 30a PC side program, 30b editing application, 49 editing processing unit, D optical disk

Claims (7)

An information processing system configured to include an information processing apparatus and a recording / reproducing apparatus each implemented with POSIX as an API,
The information processing apparatus
Information processing apparatus side communication means for performing data communication with the recording / reproducing apparatus,
The recording means included in the recording / reproducing apparatus includes an open flag that adds a truncation flag with a value indicating validity and stores a value indicating writing according to an instruction to write a data file to a recording medium to be recorded, and Information processing apparatus side control means for controlling the information processing apparatus side communication means so that a file open request specifying the file name of the data file instructed to be written is made to the recording / reproducing apparatus,
The recording / reproducing apparatus comprises:
A recording / reproducing apparatus side communication means for performing data communication with the information processing apparatus;
Recording / reproducing means for recording / reproducing data to / from the recording medium;
When a file open request is received by the recording / reproducing apparatus side communication means, based on the open flag included in the file open request, whether or not the file open request is an instruction to write a required data file If it is determined that the file open request is an instruction to write, a data file having the same file name as that specified by the file open request is recorded on the recording medium. If the data file with the same file name is recorded as a result of this determination, it is further determined whether or not the truncation flag in the above open flag is a valid value. As a result of this determination, if the truncation flag is a valid value, Comprises a recording and reproducing apparatus side control unit that executes processing according to the file open request, a
An information processing system characterized by this. A recording / reproducing apparatus in which POSIX is implemented as an API,
A communication means for performing data communication with an external device;
Recording / reproducing means for recording / reproducing data to / from the recording medium;
When a file open request from an external device is received by the communication means, whether or not the file open request is an instruction to write a required data file based on the open flag included in the file open request. If it is determined that the file open request is an instruction to write, a data file having the same file name as the file name specified by the file open request is recorded on the recording medium. If it is determined that a data file with the same file name is recorded, it is further determined whether the truncation flag in the open flag is a valid value. As a result of the determination, the truncation flag is determined to be valid. Only if, and control means for executing processing in accordance with the file open request,
A recording / reproducing apparatus comprising: The control means includes
If the truncation flag is not a value indicating validity, the processing according to the file open request is not performed by controlling the communication means so that an error notification to the external device is performed.
The recording / reproducing apparatus according to claim 2. The control means includes
As processing according to the above file open request,
The recording / playback means is controlled so that the data file with the same file name is deleted from the recording medium according to the truncation flag, and the data file with the file name specified by the file open request is transferred from the external device. Controlling the communication means so as to control the recording / reproducing means so that a data file transferred from the external device is recorded on the recording medium.
The recording / reproducing apparatus according to claim 3. When a predetermined type command other than the file open request is received as a command for designating the writing of a required data file by specifying a file name by the communication means, the command is determined by a value indicating validity. A command conversion means for adding a truncation flag and including an open flag storing a value indicating writing and converting a file name specified by the command into a specified file open request;
The recording / reproducing apparatus according to claim 2. An overwriting control method in a recording / reproducing apparatus including a communication unit that performs data communication with an external device and a recording / reproducing unit that performs recording / reproducing of data with respect to a recording medium as a recording / reproducing device in which POSIX is implemented as an API There,
When a file open request from an external device is received by the communication means, whether or not the file open request is an instruction to write a required data file based on the open flag included in the file open request. If it is determined that the file open request is an instruction to write, a data file having the same file name as the file name specified by the file open request is recorded on the recording medium. If it is determined that a data file with the same file name is recorded, it is further determined whether the truncation flag in the open flag is a valid value. As a result of the determination, the truncation flag is determined to be valid. Only in case, to execute the processing in accordance with the file open request,
An overwriting control method characterized by that. Each includes an information processing apparatus and a recording / reproducing apparatus in which POSIX is implemented as an API.
A recording / reproducing apparatus side communication means for performing data communication with the information processing apparatus;
Recording / reproducing means for recording / reproducing data to / from the recording medium;
When a file open request is received by the recording / reproducing apparatus side communication means, based on the open flag included in the file open request, whether or not the file open request is an instruction to write a required data file If it is determined that the file open request is an instruction to write, a data file having the same file name as that specified by the file open request is recorded on the recording medium. If the data file with the same file name is recorded as a result of this determination, it is further determined whether or not the truncation flag in the above open flag is a valid value. As a result of this determination, if the truncation flag is a valid value, A recording and reproducing apparatus side control unit that executes processing according to the file open request,
An information processing apparatus in an information processing system comprising:
Information processing apparatus side communication means for performing data communication with the recording / reproducing apparatus,
The recording / reproducing means provided in the recording / reproducing apparatus includes an open flag that adds a truncation flag with a value indicating validity and stores a value indicating writing according to an instruction to write a data file to a recording medium to be recorded, And an information processing apparatus side control means for controlling the information processing apparatus side communication means so that a file open request designating a file name of the data file instructed to be written is made to the recording / reproducing apparatus,
An information processing apparatus comprising:

Images