JP2015159484A - Recording device, recording method, program and imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording device which facilitates recording of an image file including RAW data, and development and deletion of the RAW data within the image file.SOLUTION: The recording device includes: acquisition means for acquiring RAW data of a moving image; developing means which performs development processing on the RAW data to produce moving image data; encoding means for encoding the moving image data; and recording control means which performs control for recording a predetermined amount of encoded moving image data and RAW data on a recording medium as a unit of one time of writing, the recording control means being configured to store first data including encoded moving image data and second data including RAW data in one image file and to record the image file on the recording medium in accordance with a predetermined filing system for dividing a recording region of the recording medium into a plurality of predetermined recording regions and managing the recording regions. The recording control means starts recording the first data and the second data which are recorded by one time of writing, from a head of a predetermined unit region formed from at least one of predetermined recording regions.

Description

  The present invention relates to a recording apparatus, a recording method, a program, and an imaging apparatus, and more particularly to a recording apparatus and a recording method capable of recording RAW data.

  2. Description of the Related Art Conventionally, in an imaging apparatus, captured still images and moving images are converted into JPEG (Joint Photographic Experts Group) or H.264. H.264 or the like is used for encoding and recording. In recent years, an imaging apparatus that records a photographed image without developing and compressing it or by performing reversible compression has also appeared. Thus, an image in a format that is not developed is called a RAW image format. By recording the image data in accordance with the RAW format, it is possible to suppress deterioration in image quality, and after recording, it is possible to perform development processing on the RAW data using desired development parameters.

  Normally, RAW data development processing is required to view a RAW format image. Depending on the contents of the development process, it may take time, and therefore, the image may not be confirmed immediately after shooting. Therefore, it has been proposed to simultaneously generate JPEG format image data and RAW format image data and record them as separate files during one shooting (see, for example, Patent Document 1).

  In the case of saving a still image in the RAW format, there are a method of setting an extension as a RAW file and saving, and a method of preventing data from being scattered by being stored in a multi-picture format (for example, Patent Document 1).

  On the other hand, in recent years, imaging devices capable of recording moving images have become widespread. In particular, products capable of recording moving images are becoming widespread even in imaging devices such as single-lens reflex cameras specialized for still image shooting. In moving image recording, a frame of a moving image is compressed according to a moving image compression standard (for example, H.264), and is recorded and stored in a recording medium as a moving image file according to a recording standard such as MOV. In the MOV, an index is stored in the moving image file so that a search can quickly be made where the compressed moving image frame is recorded in the moving image file. The index is recorded as part of the chunk structure of the moving image file.

JP 2012-80590 A

  However, conventionally, since the JPEG image data and the RAW image data are recorded as separate files, it is not possible to easily check the corresponding files. Therefore, for example, when a user wants to develop a RAW image corresponding to a JPEG image while reproducing and displaying the JPEG image, the user designates and extracts the RAW image again, and then performs development processing. There was a need to do.

  Therefore, in the present invention, when RAW format image data and developed and compressed image data are recorded, the RAW format image data can be easily specified, and when a RAW image is deleted, it can be easily specified. It is an object of the present invention to provide a recording apparatus that can be deleted.

  According to the present invention, a recording apparatus includes a RAW data acquisition unit that acquires RAW data of a moving image, a development unit that performs development processing on the RAW data to generate moving image data, and an encoding unit that encodes moving image data. And first data including moving image data encoded by the encoding means and second data including RAW data in accordance with a predetermined file system that divides and manages the recording area of the recording medium into a plurality of predetermined recording areas. A means for storing data in a single image file and recording it on the recording medium, and performing control to record a predetermined amount of encoded moving image data and RAW data on the recording medium as a unit of writing once Recording control means, wherein the recording control means is configured to record first data and second data recorded by one writing at least in a predetermined recording area, respectively. Recorded from the beginning of the predetermined unit regions consisting One.

  In the present invention, when RAW format image data and developed and compressed image data are recorded, the RAW format image can be specified and deleted, and the RAW image can be easily deleted. A recording apparatus can be provided.

1 is a schematic configuration diagram of an imaging apparatus to which a recording apparatus according to a first embodiment is applied. It is a figure which shows the structural example of a moving image file. It is a figure for demonstrating the stco atom of the moving image file shown in FIG. It is a figure which shows the example of the arrangement | positioning relationship of the recording area of a recording medium, and recording data in case the recording device which concerns on 1st Embodiment records a moving image file on a recording medium. It is a figure which shows the flowchart of the moving image recording processing operation of the recording device which concerns on 1st Embodiment. FIG. 5 is a diagram illustrating a flowchart of a developing process operation of the recording apparatus according to the first embodiment. It is a figure which shows the example of the arrangement | positioning relationship between the recording area of a recording medium, and recording data in the case of deleting the RAW data recorded by the recording device which concerns on 1st Embodiment. FIG. 6 is a flowchart of a RAW data deletion process operation of the recording apparatus according to the first embodiment. It is a figure which shows the example of the arrangement | positioning relationship of the recording area of a recording medium, and recording data in case the recording device which concerns on the modification of 2nd Embodiment records a moving image file on a recording medium.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic configuration diagram of an imaging apparatus 100 to which the recording apparatus according to the first embodiment of the present invention is applied. As will be described later, this imaging apparatus has a moving image recording mode and a normal mode and is capable of capturing moving images and still images. There may be.

  In the figure, reference numeral 110 denotes a power supply, which supplies power to each circuit in the imaging apparatus 100. Reference numeral 172 denotes a card slot into which a memory card (detachable recording medium) 173 can be inserted. With the memory card 173 inserted into the card slot 172, the memory card 173 is electrically connected to the recording / reproducing unit 171. In this embodiment, the memory card 173 is used as a recording medium. However, other recording media such as a hard disk, an optical disk, a magneto-optical disk, a magnetic disk, and other solid-state memories may be used.

  Reference numeral 101 denotes an image pickup lens that forms an optical image of a subject on the image pickup device 103, and performs zoom control, focus control, aperture control, and the like by a lens driving unit 141. Reference numeral 102 denotes a mechanical shutter which is controlled by a shutter driving unit 142. Reference numeral 170 denotes an audio acquisition unit. The microphone includes an AD converter and the like, acquires audio around the subject, and outputs audio data. The audio data is stored in the memory 132.

  The video signal processing unit 121 converts a moving image signal or a still image signal from the image sensor 103 into a digital signal, performs various processes, and stores the digital signal in the memory 132. For example, as described later, in order to record compressed moving image data, the moving image signal from the image sensor is subjected to development processing and converted into a format suitable for compression. In addition, the video signal processing unit 121 records RAW format moving image data and outputs it without performing development processing.

  During recording, the codec 122 reads the moving image data from the memory 132 and performs compression processing according to the moving image data to be recorded. For example, when recording compressed moving image data, the moving image data subjected to development processing is read from the memory 132, The amount of information is compressed by encoding according to an encoding format such as H.264. Further, when recording a RAW format moving image signal, the codec 122 reads out a moving image signal that has not been subjected to development processing from the memory 132 and performs compression processing using a lossless compression method. Note that RAW format moving image data can also be recorded without being subjected to compression processing.

  Further, at the time of recording, the codec 122 reads audio data from the memory 132 and encodes it according to a known encoding method such as AAC (Advanced Audio Coding) to compress the information amount. At the time of reproduction, the reproduced audio data is decoded and the amount of information is expanded.

  The image sensor 103 is a photoelectric conversion unit configured by a CMOS (Complementary Metal-Oxide Semiconductor) image sensor or the like. The imaging element 103 can photoelectrically convert a subject image formed by an imaging optical system including an imaging lens 101 and a shutter 102 and output an image signal.

  In addition to the output image data of the video signal processing unit 121, the memory 132 temporarily stores audio data output by the audio acquisition unit 170 and data when a CPU (Central Processing Unit) 131 performs various processes. The timing generator 143 provides timing to the image sensor 103 and the video signal processing unit 121. The bus 150 includes a lens driving unit 141, a shutter driving unit 142, an image sensor 103, a timing generator 143, a video signal processing unit 121, a CPU 131, a power supply 110, a memory 132, a display control device 151, an operation unit 161, and a recording / reproducing unit. 171 is connected. The CPU 131 controls the entire imaging apparatus via the bus 150. For example, in order to read and process an image signal from the imaging element 103, the CPU 131 determines the operation timing of each unit such as the imaging element 103, the video signal processing unit 121, and the memory 132. Control.

  The display control device 151 drives and controls a TFT (Thin Film Transistor) 152 formed of a liquid crystal display element and a VIDEO output terminal 153. The display control device 151 also drives and controls an HDMI (registered trademark) (High-Definition Multimedia Interface) terminal 154. Further, the display control device 151 outputs the image data arranged in the display image format in the recording area of the memory 132 to each display device. Here, the display image data area arranged in the memory 132 is referred to as a VRAM (Video Random Access Memory).

  The operation unit 161 includes an operation member such as a touch panel that performs various switches, operation mode switching, display image selection, and the like. For example, as shown in the figure, a main switch (SW), a first release switch (SW1), a second release switch (SW2), a live view start / end button (LV), a moving image recording start / end button (R), up and down It includes a left / right selection button (+) and a setting button (Set).

  When the user turns on the main switch (SW), the CPU 131 executes a predetermined control program stored in a memory (not shown) to start control of the entire imaging apparatus. When the main switch (SW) is turned off, a predetermined program is executed, and the image pickup apparatus is set to the standby mode. The first release switch (SW1) is turned on with a first stroke (half-pressed state) of a release button (not shown), and the second release switch (SW2) is turned on with a second stroke (full-pressed state) of the release button.

  In addition, the CPU 131 controls the imaging device 100 according to pressing of the up / down / left / right selection button (+) and the setting button (Set) and the operation state of the imaging device 100. For example, the moving image recording mode can be switched between the normal mode and the RAW storage mode by performing selection and setting on the graphical user interface using the up / down / left / right selection button (+) and the setting button (Set).

  When the live view start / end button (LV) is pressed, image data is captured from the image sensor 103 on a regular basis (for example, 30 times per second) and placed in the VRAM, so that an image captured from the image sensor 103 in real time can be obtained. Can be displayed. If the live view start / end button (LV) is pressed while the live view is operating, the live view is ended.

  When the moving image recording start / end button (R) is pressed, the moving image recording operation can be started. In the moving image recording operation, the image data captured from the image sensor 103 and the audio data captured from a sound input unit (not shown) are compressed by the codec 122 according to the moving image compression standard, a moving image file is formed by a method described later, and the recording medium 173 is recorded. To record. When moving image recording start / end button (R) is pressed during moving image recording, moving image recording is stopped.

<Video file structure>
Next, the configuration of the moving image file handled in this embodiment will be described. FIG. 2 is a diagram illustrating a configuration example of a moving image file handled in the present embodiment. The moving image file 200 stores various data such as moving image data and audio data. The moving image file 200 includes metadata including position information regarding the position of moving image data and the position of audio data. The moving image data, audio data, and metadata stored in the moving image file 200 increase in size according to the recording time. Further, each piece of information stored in the metadata is information related to moving image data and audio data. Therefore, after the moving image data and audio data are recorded, the contents are determined.

  The MOV file format is known as a file format for recording moving image data and audio data in such a file format. In the present embodiment, a moving image file is recorded according to the MOV file format.

  An MOV file is composed of units called atoms. One atom includes an atom size, an atom type, and an atom data area. The atom size stores information on the data length (size) of the atom. The atom type stores information indicating the data type stored in the atom data. Actual data is stored in the atom data. The atom type is a 32-bit fixed length data area. Atom data is a variable length area. The atom size is usually 32 bits, and the size of one atom is usually 0xFFFFFFFF bytes or less. The atom size can be extended to 64 bits. Therefore, as described later, when the size of the moving image stored in the mdat atom exceeds 4 GB, the atom size of the mdat atom is recorded as 64-bit data.

  The moving image file 200 is composed of three atoms: a file type atom (ftyp), a movie data atom (mdat), and a movie atom (moov). Each atom of ftyp, mdat, and moov is the highest layer.

  “ftyp” is an atom having an atom type of “ftyp” and storing information related to the file type. Based on the atom data described in ftyp, it is possible to determine the encoding method of moving image data and audio data stored in the MOV file.

  mdat is an atom in which the atom type is mdat and each sample of moving image data and audio data is stored. The encoded moving image data and audio data are divided and stored in units of chunks. In the present embodiment, one chunk of moving image data is assigned to H.264. The video data is 1 GOP (Group of Pictures) defined by the H.264 system. Further, one chunk of audio data is set as audio data of the number of frames corresponding to this 1 GOP. Further, one chunk of RAW data is also RAW data of the number of frames corresponding to this 1 GOP.

  The moov is an atom that has an atom type of moov and stores metadata related to moving image data and audio data. In the moov atom data, information such as a chunk offset indicating an offset from the file head of each chunk of moving image data and audio data, the number of samples of each chunk, and a sample size are stored. A moov includes one or more traks. The trak atom is information that defines one or more video tracks and audio tracks.

  In FIG. 2, for the sake of explanation, trak is described as trak1, trak2, and trak3, which are audio, video, and RAW tracks, respectively. trak includes mdia. mdia is information describing the media type of each track. For example, the mdia chunk information includes information for determining whether the trak contains video information, audio information, or RAW information. .

  In the present embodiment, the mdia information is used to determine whether the trak contains the RAW information. mdia includes mdhd and stbl. In stbl, information such as a chunk offset indicating an offset from the beginning of each chunk of moving image data and audio data, the number of samples of each chunk, the display time of the sample, and the sample size are stored. Here, one sample of moving image data corresponds to a frame, and one sample of audio data corresponds to an audio frame.

  stco and co64 are atoms that store information indicating the position (offset position) from the beginning of each chunk of the moving image data and audio data stored in mdat. These pieces of position information are information necessary for reproducing moving image data and audio data stored in the moving image file. Note that co64 is an atom that can store position information that can be expressed in 64 bits.

  FIG. 3 shows data stored in the stco atom and the co64 atom. FIG. 3A shows a stco atom. The atom size indicates the overall size of this atom. The atom type stores stco. The version indicates the version of the atom and normally 0 is stored. Although the flag is used in other atom types, 0 is stored because it is not used here.

  The number of entries indicates the number of the next element “offset”. As the offset, a value indicating the position from the file head of each chunk of moving image data and audio data stored in mdat is stored. One entry indicates the offset of one chunk. By referring to this offset when performing reproduction, it is possible to know where the moving image data to be reproduced exists in the file. The offset stored in the stco atom is 4 bytes (32 bits) of data. Therefore, stco can represent the offset value of each chunk when the size of the moving image file is up to 4 GB.

  On the other hand, FIG. 3B shows a co64 atom. co64 is the same as stco except for the last offset. The offset stored in the co64 atom is 8 bytes (64 bits) of data. Therefore, the co64 atom can represent a larger value than the stco atom as the offset value of each chunk. For this reason, co64 can represent the offset value of each chunk even when the size of the moving image file exceeds 4 GB. The stsz atom stores the size information of the data at the offset for each element of stco or co64.

<Create movie file>
Hereinafter, the moving image file creation processing according to the present embodiment will be described with reference to FIGS.
In the present embodiment, the generated moving image file is recorded on a recording medium (memory card) 173 according to a FAT (File Allocation Tables) file system. In this embodiment, at the time of recording, both compressed moving image data and RAW format moving image data are generated from the captured moving image data. The compressed moving image data and the RAW format moving image data corresponding to the moving image data are recorded together with the audio data by storing them in one moving image file (MOV format file).

  FIG. 4 is a diagram showing an example of the arrangement relationship between clusters and moving image file data when the moving image file generated in the present embodiment is recorded on a recording medium (memory card) 173 according to a FAT (File Allocation Tables) file system. is there. As shown in the figure, the FAT file system manages the recording area of the recording medium by dividing it into clusters (predetermined recording areas). In the present embodiment, the recording area of the audio data of the moving image file, the encoded data of the moving image data, and the RAW data is determined based on a predetermined unit area formed by clusters that are management units of the recording area of the recording medium. Hereinafter, a recording configuration of the present embodiment in which a predetermined unit area is one cluster will be described.

  FIG. 5 is a flowchart illustrating the recording processing operation of the recording apparatus according to the present embodiment. This processing operation is a moving image recording flow executed by the CPU 131 controlling each unit. The CPU 131 functions variously through control of each unit of the imaging apparatus 100. For example, it functions as RAW data acquisition means for acquiring image RAW data and as development means for generating image data from the acquired RAW data. It also functions as an encoding unit that encodes image data to generate encoded data, and a file generation unit that forms an image file from the encoded data and RAW data. The CPU 131 functions as a recording control unit that records an image file on a recording medium according to a predetermined file system, and as a file management unit that generates management information of the file system. A program that causes the CPU 131 to function as each of the above-described means is recorded on a computer-readable recording medium (not shown) in the present embodiment.

  In the flowchart of FIG. 5, first, in step S101, the CPU 131 detects the pressing of the live view start / end button (LV) and starts the live view. In step S102, when the CPU 131 detects that the recording start / end button (R) is pressed, it creates a new moving image file. Then, trak is generated (step S103), and encoding of the moving image is started (step S104). Here, three tracks are generated: an audio data track, a compressed moving image data track, and a RAW format moving image data track. Also, the compressed moving image data and the RAW format moving image data are generated in parallel, encoded by the respective encoding methods, and stored in the memory 132.

  The encoded moving image data and audio data are sequentially stored in the memory 132. In addition, the CPU 131 stores information such as the generated code amount from the signal processing unit 121 in the memory 132 in accordance with the encoding process of the moving image and the sound. In this manner, encoded unrecorded moving image data and audio data are sequentially stored in the memory 132. When the unrecorded moving image data and audio data stored in the memory 132 reach a predetermined amount, the CPU 131 determines that it is a writing timing to the recording medium 173 (step S105). Then, the CPU 131 instructs the recording / playback unit 171 to record the moving image data and audio data stored in the memory 132 (step S106). In response to this instruction, the recording / playback unit 171 sequentially stores the moving image data and the audio data in the mdat atom described with reference to FIG. 2 and records them on the recording medium 173 as a moving image file.

  The mdat atom in FIG. 2 is recorded on a recording medium 173 having recording areas divided into cluster units as shown in FIG. In FIG. 4, audio data and moving image data are recorded on the recording medium from the cluster 4.

  In step S107, data padding is performed. In the padding, when moving image data is recorded partway through the cluster 5 in FIG. 4, the remaining part of the cluster 5 is intentionally consumed with dummy data, and the end of the RAW data recording area coincides with the end of the cluster. Let By doing so, the next time data is recorded on the recording medium, the file system can start recording from the beginning of the divided area managed by dividing the storage area of the storage medium. In step S108, the RAW data is written via the recording / playback unit 171.

  At the stage of writing the RAW data, the CPU 131 determines that a recording area remains in the cluster 7 as shown in FIG. 4, and performs padding again according to the determination result (step S109). Thus, in padding, when valid data is consumed only halfway through a cluster, the rest of the cluster is consumed as dummy data.

  In step S110, the trak information is updated. The audio data and video data written in step S106 and the offset and size of the RAW data written in step S108 are stored as offset information in stco or co64 described in FIG. 3 and as size information in stsz. . In step S111, it is determined whether recording start / end button 165 has been pressed. When the recording start / end button 165 is not pressed, the process returns to step S104 to continue moving image recording.

  In step 112, the CPU 131 determines whether unrecorded encoded data and RAW data stored in the memory 132 are present. If it is determined that it does not exist, the process proceeds to step S118. If it is determined that it exists, the CPU 131 proceeds to step S118 if it determines that it does not exist. If it is determined that the data exists, the CPU 131 instructs the recording / playback unit 171 to record the moving image data and audio data stored in the memory 132 (step S113). Then, padding is performed (step S114), RAW data is written (step S115), padding is performed (step S116), and the trak information is updated (step S117).

  In step S118, the CPU 131 generates metadata defined in the MOV file format. The CPU 131 instructs the recording / playback unit 171 to store the metadata in the moov atom for recording. The CPU 131 controls the video signal processing unit 121 to generate a thumbnail image from one screen of the recorded moving image data and store it in a predetermined area of the moving image file.

<How to use RAW data of video files>
Next, with reference to FIG. 6, the development processing operation using the RAW data of the moving image file according to the present embodiment will be described.
The user operates the touch panel included in the operation unit 161 to instruct switching to the playback mode. When there is an instruction for the playback mode, the CPU 131 instructs the recording / playback unit 171 to read a thumbnail image (representative image) from each moving image file. The recording / playback unit 171 reads the thumbnail image data of each moving image file from the recording medium 173 and sends the thumbnail image data to the video signal processing unit 121. The video signal processing unit 121 decodes the thumbnail image data, and further changes the size to a size suitable for the index screen, thereby generating an index screen and sending it to the display control unit 151. The display control unit 151 displays the index screen from the video signal processing unit 121 on the display unit 152.

  When the user operates the touch panel to select a desired image from the thumbnail images displayed on the index screen and instructs playback, the CPU 131 functions to play back the selected moving image. That is, the recording / reproducing unit 171 is instructed to reproduce the compressed moving image data and audio data from the moving image file corresponding to the designated thumbnail image.

  The recording / playback unit 171 reads the compressed moving image data and audio data from the specified moving image file, and sends them to the video signal processing unit 121. The video signal processing unit 121 decodes the compressed moving image and audio data and sends them to the display control unit 151. The display control unit 151 displays the decoded moving image on the display unit 152. When playback stop is instructed by the user, the CPU 131 controls to stop playback of the moving image and display the index screen again.

  When the index screen is displayed, when the user operates the touch panel included in the operation unit 161 to select a desired thumbnail image and instructs development processing, the CPU 131 performs development via the video signal processing unit 121. Functions as a means. That is, in accordance with the development instruction, RAW data development processing corresponding to the selected thumbnail image is performed. If the development processing of the RAW data corresponding to the thumbnail image selected by the user has already been performed, the CPU 131 displays that fact on the display unit 152 and does not perform the development processing.

The processing in FIG. 6 is a flow for performing development using RAW data of a moving image file, which is executed by the CPU 131 controlling each unit.
First, in step S201, the CPU 131 instructs the recording / playback unit 171 to read the moov atom of the moving image file including the RAW data recorded on the recording medium 173. In step S202, a search for trak containing RAW information is performed from trak. In order to find the trak including the RAW information from among them, the CPU 131 checks the information on the mdia chunks of trak1, trak2, and trak3 in FIG. As a result, it can be seen that trak3 is a trak including RAW data information. Therefore, the CPU 131 reads information about stk or co64 of trak3 and stsz (S203), and reads RAW data included in the moving image file via the recording / playback unit 171 based on the information (step S204) (step S204). Extract). Here, the CPU 131 functions as a RAW data extraction unit that extracts RAW data from a moving image file via the recording / playback unit 171.

  Next, the read out raw data is sequentially developed by the video signal processing unit 121 (step S205). At this time, the user may arbitrarily set processing parameters for development. The video signal processing unit 121 does not compress the developed moving image data. Compressed according to H.264 and stored in the memory 132. The recording / playback unit 171 reads the developed moving image data from the memory 132 and records it on the recording medium 173 as a file different from the original moving image file. In this case, information indicating the relationship with the original moving image file may be added to the developed moving image data file.

  Further, additional information indicating that the development process has been completed may be added to the moving image file including the developed RAW data. Then, when the thumbnail image is displayed next time, based on the additional information, information indicating that the image has been developed may be added to the thumbnail of the moving image file including the developed RAW data. In this way, the user can easily recognize whether or not the RAW format moving image data included in each moving image file has been developed.

<Delete RAW data from video file>
Next, a processing operation for deleting RAW data from a moving image file according to the present embodiment will be described with reference to FIGS. Similar to the development processing operation, this processing operation is also performed by performing an image selection operation and RAW data deletion instruction on the index screen using the touch panel.

  FIG. 7 is a diagram showing the arrangement relationship when the processing operation for deleting RAW data is performed according to the flowchart of FIG. 8 in the arrangement relationship between the recording medium cluster and the recorded moving image file data described in FIG. It is. With this processing operation, it is possible to delete the RAW data simply by reconfiguring the FAT chain (FAT data in FIG. 4) without changing the cluster data in which the actual data of mdat is recorded.

The process of FIG. 8 is a flow for deleting RAW data from a moving image file, which is executed by the CPU 131 controlling each unit.
First, in step S301, the CPU 131 instructs the recording / playback unit 171 to read the moov atom of the moving image file including the RAW data instructed to be deleted, recorded in the recording medium 173. In step S302, a search for a trak containing RAW data information is performed from the trak. At this time, the CPU 131 performs a search by examining the information of mdia as described above. The trak3 including the RAW data information is found, and the CPU 131 reads stco or co64 and stsz information (step S303).

  In step S304, the CPU 131 identifies the FAT chain in which the RAW data is arranged from the RAW data position information indicated by stco or co64 of the RAW data and the RAW data indicated by stsz and the FAT information of the moving image file. Since the offset from the beginning of the moving image file is known from stco or co64, the CPU 131 follows the FAT chain from the beginning of the moving image file to the offset position, and specifies the FAT that is the starting position of the RAW data. Further, since the size of the RAW data can be known from stsz, the CPU 131 follows the FAT chain and identifies the FAT that is the end position of the RAW data. At this time, since the RAW data is aligned with the end of the cluster by using padding, the FAT chain (a series of clusters) from the start position to the end position is directly deleted.

  In step S305, the CPU 131 operates the FAT (management table) to separate the cluster in which the RAW data and the padding are recorded from the file. Specifically, in FIG. 7, in order to separate the RAW data and padding recorded in cluster 6 and cluster 7 from the file, the data of FAT cluster 5 is changed from “0006” to “0008”. Then, the data of the FAT clusters 6 and 7 is changed to “0000”. As a result, on the FAT, the data next to the cluster 5 becomes the cluster 8, and the RAW data and the padding are separated. This operation is performed on all the RAW data, and as shown in FIG. 7, the clusters 10 and 11 and the clusters 14 and 15 are also separated by the FAT reconfiguration.

  In step S306, CPU 131 updates the size information of the moving image file. Specifically, in FIG. 7, the size information of the directory entry of the “MVI — 0001.MOV” moving image file is updated to reflect the size of the FAT chain separated by the FAT operation. In the example of FIG. 7, the size is changed from 12 to 6.

  In step S307, the CPU 131 deletes trak3 containing the management information of the RAW data retrieved from the moov atom in step S302. In step S308, the CPU 131 writes the updated FAT chain, directory entry, and moov atom back to the recording medium 173.

  In the above embodiment, a moving image file including RAW data can be created and developed, and RAW data can be deleted from the moving image file. Furthermore, when deleting RAW data, the RAW data can be deleted without changing the cluster data in which the actual data of mdat is recorded. Therefore, access to the recording medium 173 is reduced, and the deletion process can be performed more quickly. .

  Next, a modification of the first embodiment described above will be described with reference to FIG. In the first embodiment, the encoded data of the moving image file and the recording area of the RAW data are controlled based on a predetermined unit area made up of one cluster. This is different from the first embodiment in that the processing is performed based on a predetermined unit area composed of clusters. Since the configuration of the imaging apparatus and the flowchart of the processing operation in the present modification are the same as those in the first embodiment, the description here is omitted unless particularly necessary.

  As described above, in this modification, the moving image file that controls the recording of the moving image file including the RAW data and the control of the data recording area at the time of deleting the recorded RAW data in units of a predetermined area including a plurality of stars. The recording configuration of is shown. That is, the present invention can be applied to any of predetermined unit areas including at least one unit when the file system divides and manages the recording area of the recording medium. In the present modification, when a moving image file is recorded in the speed class on an SD card, which is the recording medium 173, the recording configuration of the moving image file will be described by taking as an example a case where a predetermined unit area is composed of three clusters.

  Since the memory 132 included in the imaging apparatus has a finite size, in moving image recording, it is necessary to write moving image data to the recording medium 173 within a certain time so that the memory 132 does not become full. As a method for realizing this, when the recording medium is an SD card, there is a method of guaranteeing a writing speed on the SD card by performing speed class writing which is a standard of the SD card.

  In speed class writing, writing is performed in a writing unit called AU. The AU is composed of a plurality of continuous clusters. If the amount to be written at one time is less than AU, if the next writing is started from the middle of AU, the speed class condition is not satisfied and the writing speed to the SD card is not guaranteed. Speed class writing is realized by performing one writing to the AU boundary.

  FIG. 9 shows an example of the arrangement relationship between the cluster and the moving image file data when the generated moving image file is recorded in the recording medium (SD card) 173 according to the FAT file system by performing speed class writing according to the present modification. FIG.

  The flow of creating a moving image will be described with reference to FIG. In the first embodiment, in the first embodiment, the padding amount is up to the cluster boundary at step S109. In this modification, the padding is performed up to the AU boundary (also the cluster boundary).

  In the moving image creation flow of FIG. 5, if it is determined in step S105 that the writing timing to the recording medium 173 is reached, the audio data and moving image data are written and padding is performed up to the cluster boundary. After the RAW data is written in step S108, padding is performed up to the AU boundary in step S109.

  As a result, it is determined that it is time to write to the recording medium 173 in step S105, and when writing audio data and moving image data, writing can be started from the AU boundary, and speed class writing can be realized. I can do it. That is, the writing speed on the SD card can be guaranteed.

  As shown in FIG. 9, a moving image file created by speed class writing has a large amount of padding and a large file size. 4 and 9, the same data is written, but the size of FIG. 9 is larger. However, the moving image file created in this modification has RAW data and padding that match the cluster boundaries, and the processing at the time of development can be performed by the same method as in the first embodiment.

  As in the first embodiment, the RAW data is deleted by separating the RAW data and the padding area from the FAT chain and deleting the RAW data trak from the moov. At this time, the amount of padding to be separated from the FAT chain is calculated not at the cluster boundary but at the AU boundary.

  As described above, according to the present modification, even when a moving image file including RAW data is created by speed class writing in order to guarantee the writing speed to the SD, processing such as development or RAW data is deleted from the moving image file. It becomes easy.

  The example in which the recording apparatus of the present invention is applied to the imaging apparatus 100 has been described above, but the recording apparatus of the present invention can also be applied to an information processing apparatus such as a computer.

  In the first embodiment and its modification, the case where an image file including moving image data and RAW data is recorded on a recording medium has been described as an example. However, the present invention is not limited to this. The present invention may be applied to a case where an image file including still image encoded data and RAW data, or moving image data, an image file including still image data and RAW data captured during moving image shooting, is recorded on a recording medium.

  The object of the present invention can also be achieved by supplying a storage medium storing software program codes for realizing the functions of the above-described embodiments to a system or apparatus. That is, it goes without saying that the object of the present invention can also be achieved when the computer (or CPU or MPU) of the system or apparatus reads and executes the program code stored in the storage medium.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code itself and the storage medium storing the program code constitute the present invention.

  As a storage medium for supplying the program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

  In addition, the functions of the above-described embodiment can also be realized when an OS (basic system or operating system) operating on the computer performs part or all of the actual processing based on the instruction of the program code read by the computer. Realized. Needless to say, this case is also included in the present invention.

  Furthermore, after the program code read from the storage medium is written to the memory provided in the function expansion board inserted in the computer or the function expansion unit connected to the computer, the processing based on the instruction of the program code is also performed. Included in the invention. That is, it goes without saying that the present invention also includes the case where the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing based on the instruction of the program code to realize the functions of the above-described embodiment. Yes.

  The above-described embodiments are merely examples of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed as being limited thereto. That is, the present invention can be implemented in various forms without departing from the technical idea or the main features thereof.

Claims (14)

RAW data acquisition means for acquiring RAW data of moving images;
Developing means for developing moving image data by developing the RAW data;
Encoding means for encoding the moving image data;
In accordance with a predetermined file system for dividing and managing the recording area of the recording medium into a plurality of predetermined recording areas, the first data including the moving image data encoded by the encoding means and the second including the RAW data A means for storing data in a single image file and recording it on the recording medium, wherein a predetermined amount of the encoded moving image data and the RAW data are recorded on the recording medium as a single writing unit. Recording control means for controlling,
With
The recording control means records the first data and the second data recorded by one writing from the beginning of a predetermined unit area composed of at least one of the predetermined recording areas. A recording apparatus.   The predetermined file system includes a management table of the plurality of predetermined recording areas, and the recording control unit is configured to delete the RAW data stored in the image file recorded on the recording medium according to an instruction to delete the RAW data. The RAW data instructed to be deleted by changing the management table so that the predetermined recording area related to the recording area of the second data including the RAW data instructed to be deleted is an unrecorded area. The recording apparatus according to claim 1, wherein the recording device is deleted from an image file including the RAW data instructed to be deleted. Means for generating management information relating to the first data and the second data stored in the image file;
The recording control means stores the management information in the image file and records it on the recording medium, and is instructed to delete the management information stored in the image file in response to the deletion instruction. The recording apparatus according to claim 1, wherein the management information related to the second data including RAW data is deleted from the image file.   The recording apparatus according to claim 3, wherein the management information includes position information related to a position of the first data and a position of the second data in the image file.   The management information includes a first track including information related to the first data and a second track related to the second data, and the recording control means responds to the deletion instruction in response to the second instruction. The recording apparatus according to claim 3, wherein the track is deleted from the image file. Means for generating management information including position information regarding the position of the first data and the position of the second data in the image file;
The recording control means stores the management information in the image file and records it on the recording medium, and responds to the development instruction in response to a development instruction for RAW data included in the image file recorded on the recording medium. 2. The apparatus according to claim 1, wherein RAW data is read from the image file to be processed based on the position information, and the developing means generates developed moving image data by performing development processing on the read RAW data. The recording device described in 1.   The recording control unit records a file including the developed moving image data from the developing unit on the recording medium, and the file including the developed moving image data includes an image file including the developed moving image data; The recording apparatus according to claim 4, further comprising information indicating a relationship between the recording apparatus and the recording apparatus.   The recording apparatus according to claim 1, wherein the predetermined unit area includes one predetermined recording area.   9. The recording apparatus according to claim 1, wherein the predetermined unit area includes a predetermined number of the predetermined recording areas and is equal to a writing unit of the recording medium.   The recording apparatus according to claim 1, wherein the first data includes the encoded moving image data and audio data. RAW data acquisition step for acquiring RAW data of a moving image;
A development step of performing development processing on the raw data to generate moving image data;
An encoding step of encoding the moving image data;
In accordance with a predetermined file system that divides and manages a recording area of the recording medium into a plurality of predetermined recording areas, a first data including the moving image data encoded in the encoding step and a second including the RAW data A step of storing data in one image file and recording it on the recording medium, wherein a predetermined amount of the encoded moving image data and the RAW data are recorded on the recording medium as a unit of writing once. A recording control step for performing control;
With
The recording control step is a step of recording the first data and the second data recorded by one writing from the beginning of a predetermined unit area including at least one of the predetermined recording areas. A recording method characterized by comprising: A program for controlling a recording device,
Computer
RAW data acquisition means for acquiring RAW data of moving images;
Developing means for generating moving image data by developing the raw data;
Encoding means for encoding the moving image data;
In accordance with a predetermined file system for dividing and managing the recording area of the recording medium into a plurality of predetermined recording areas, the first data including the moving image data encoded by the encoding means and the second including the RAW data A means for storing data in a single image file and recording it on the recording medium, wherein a predetermined amount of the encoded moving image data and the RAW data are recorded on the recording medium as a single writing unit. Recording control means for performing control and recording each of the first data and the second data recorded by one writing from a head of a predetermined unit area including at least one of the predetermined recording areas Program to function as.   A computer-readable storage medium storing the program according to claim 12. Imaging means for capturing an optical image of a subject and outputting an image signal;
Generating means for generating RAW data from an image signal output by the imaging means;
Developing means for developing moving image data by developing the RAW data;
Encoding means for encoding the moving image data;
In accordance with a predetermined file system for dividing and managing the recording area of the recording medium into a plurality of predetermined recording areas, the first data including the moving image data encoded by the encoding means and the second including the RAW data A means for storing data in a single image file and recording it on the recording medium, wherein a predetermined amount of the encoded moving image data and the RAW data are recorded on the recording medium as a single writing unit. Recording control means for controlling,
With
The recording control means records the first data and the second data recorded by one writing from the beginning of a predetermined unit area composed of at least one of the predetermined recording areas. An imaging apparatus characterized by the above.

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