JP4942164B2 - Moving image format file generation method, moving image format file generation apparatus, and storage medium - Google Patents

Description

The present invention is a method of generating a moving image format file generated according to moving image format compatibility with lower standards, generator of a moving image format file, relates 及 beauty storage medium.

  In recent years, moving image data shot by a digital still camera (DSC) or a digital video camera (DVC) is recorded on a recording medium such as an SD card in an AVI (Audio Visual Interleaving) format or the like. And many people enjoy playing and editing on the spot. Further, the capacity of the recording medium is increasing year by year, and moving image data can be recorded for a long time. For example, recording in the extended AVI format corresponding to moving image data exceeding 1 GB is increasing.

  In the AVI format, only one piece of index information relating to stream data in the moving image file is arranged immediately after the stream data. On the other hand, in the extended AVI format that is a higher standard of the AVI format, a plurality of index information relating to stream data in the moving image file exists in the middle of the moving image stream.

  The content of the index information in the extended AVI format is different from the index information in the AVI format that is a lower standard. Therefore, there is a problem that an application that does not support the extended AVI format cannot recognize the extended AVI file as a moving image file. For example, some Windows (registered trademark) OSs among various Windows (registered trademark) OSs do not support the extended AVI format. For this reason, when operating on an unsupported Windows (registered trademark) OS, moving image file information such as the frame size and the number of frames is not displayed even if the properties of the extended AVI file are displayed.

Regarding this problem, in a moving image file created by DirectShow, an application program of Microsoft Corporation, index information in AVI format is further added immediately after index information in the beginning of extended AVI format. Thereby, even an application that does not support the extended AVI format can recognize a moving image file created by DirectShow as a moving image file.
JP 2005-318194 A

However, the AVI format index information added by DirectShow includes all the contents corresponding to the extended AVI format index information, and thus there is a problem that the data size becomes large. Since the AVI format index information is not used when the extended AVI file is played back, it is desirable that this area be small .

Accordingly, the present invention also maintains compatibility in the application to not support the higher standard, and an object thereof is to provide a method of generating or One full Airusaizu moving image format file that suppresses an increase in.

In order to achieve the above object of the present invention, a method for generating a moving image format file according to an embodiment of the present invention includes:
A first index information section generating step for generating a first index information section compliant with the first standard, including management information of moving image data;
A moving image data index portion generating step for generating a moving image data index portion composed of the moving image data and the first index information portion;
A moving image format file generating step for generating a moving image format file composed of one or a plurality of moving image data index units,
Including the management information before the Symbol moving image data, and the second index information unit generating step of generating second index information section conforming to the second standard is a lower standard of the first standard,
A second index information section arranging step of arranging the second index information section generated in the second index information section generating step immediately after the leading moving picture data index section in the moving picture format file; Prepared ,
Management information included in the second index information part, and the part of the management information contained in the first index information section, the second feature information der Rukoto converted to a format complying with standards .

In order to achieve the above object of the present invention, an apparatus for generating a moving image format file in yet another embodiment of the present invention provides:
First index information section generating means for generating a first index information section conforming to the first standard, including management information of moving image data;
A moving image data index section generating means for generating a moving image data index section composed of the moving image data and the first index information section;
In a moving image format file generating apparatus, comprising: a moving image format file generating unit that generates a moving image format file composed of one or a plurality of the moving image data index units,
Including the management information before the Symbol moving image data, and the second index information unit generating means for generating a second index information section conforming to the second standard is a lower standard of the first standard,
A second index information section arranging means for arranging the second index information section generated by the second index information section generating means immediately after the leading moving picture data index section in the moving picture format file; Prepared ,
Management information included in the second index information part, and the part of the management information contained in the first index information section, the second feature information der Rukoto converted to a format complying with standards .

According to the present invention, even maintaining the compatibility in to not support the higher standard application, or One method of generating the moving image format file that suppresses an increase in the full Airusaizu can be provided.

  Hereinafter, a digital video camera to which an embodiment of the present invention is applied will be described with reference to the drawings. FIG. 1 is a diagram showing an example of a configuration of a digital video camera (hereinafter referred to as DVC) in which an embodiment of the present invention can be incorporated. Although the embodiment of the present invention can be applied not only to DVC but also to a digital still camera (hereinafter referred to as DSC), a personal computer (hereinafter referred to as PC), and the like, this embodiment will be described as an example applied to DVC. The DSC has a function of capturing not only a still image but also a moving image. In the embodiment of the present invention, the DSC is applied in association with the function of capturing a moving image of the DSC.

  In FIG. 1, 100 is a DVC (ie, a digital video camera). Reference numeral 10 denotes a photographing lens, 12 denotes a shutter having a diaphragm function, 14 denotes an image sensor that converts an optical image into an electric signal, and 16 denotes an A / D conversion circuit that converts an analog signal output from the image sensor 14 into a digital signal. The image sensor 14 is configured by a CMOS sensor, a CCD sensor, or the like.

  A timing generation circuit 18 supplies a clock signal and a control signal to the image sensor 14, the A / D conversion circuit 16, the D / A conversion circuit 26, and the like, and is controlled by the memory control circuit 22 and the system control circuit 50.

  An image processing circuit 20 performs predetermined pixel interpolation processing and color conversion processing on the image data from the A / D conversion circuit 16 or the image data from the memory control circuit 22. The image processing circuit 20 performs predetermined calculation processing using the captured image data, and the system control circuit 50 controls the exposure control circuit 40 and the distance measurement control circuit 42 based on the obtained calculation result. I do. These processes include a TTL (through the lens) AF (autofocus) process, an AE (automatic exposure) process, an EF (flash pre-emission) process, and the like. Further, the image processing circuit 20 performs predetermined arithmetic processing using the captured image data, and also executes TTL AWB (auto white balance) processing based on the obtained arithmetic result.

  A memory control circuit 22 controls the A / D conversion circuit 16, timing generation circuit 18, image processing circuit 20, image display memory circuit 24, D / A conversion circuit 26, memory circuit 30, compression / decompression circuit 32, and the like. To do.

  Image data from the A / D conversion circuit 16 passes through the image processing circuit 20 and the memory control circuit 22, or image data from the A / D conversion circuit 16 passes directly through the memory control circuit 22 and the image display memory circuit 24. Alternatively, it is written in the memory circuit 30.

  Reference numeral 24 denotes an image display memory circuit, and 26 denotes a D / A conversion circuit. Reference numeral 28 denotes an image display device composed of a TFT LCD or the like. Display image data written in the image display memory circuit 24 is displayed by the image display device 28 via the D / A conversion circuit 26. If the image data captured using the image display device 28 is sequentially displayed, the electronic viewfinder function can be realized.

  Further, the image display device 28 can arbitrarily turn on / off the display under the control of the system control circuit 50. When the display is turned off, the power consumption of the DVC 100 can be greatly reduced.

  Further, the image display device 28 can be structured to be coupled to the side surface of the DVC 100 main body by a rotatable hinge portion, and can set an arbitrary direction and angle to provide an electronic finder function, a reproduction display function, and various display functions. It is possible to use.

  Further, it is possible to store the display portion of the image display device 28 toward the side surface of the DVC 100. In this case, by separately providing an image display unit open / close detection means, the storage state is detected to detect the storage state. 28 display operations can be stopped.

  Reference numeral 30 denotes a memory circuit for storing captured still image data and moving image data, and has a sufficient storage capacity for storing a predetermined number of still image data and moving image data for a predetermined time.

  The memory circuit 30 can also be used as a work area for the system control circuit 50. The memory circuit 30 is also used as a write buffer for the recording media 120 and 130. Reference numeral 32 denotes a compression / decompression circuit that compresses and decompresses image data by adaptive discrete cosine transform (ADCT) or the like. The image data stored in the memory circuit 30 is read and subjected to compression processing or decompression processing. Write to the memory circuit 30.

  Reference numeral 40 denotes an exposure control circuit that controls the shutter 12 having a diaphragm function, and has a flash light control function in cooperation with the flash 48.

  Reference numeral 42 denotes a distance measuring control circuit that controls the focusing of the photographing lens 10, reference numeral 44 denotes a zoom control circuit that controls zooming of the photographing lens 10, and reference numeral 46 denotes a barrier control circuit that controls the operation of the protection means 102 serving as a barrier.

  A flash 48 has an AF auxiliary light projecting function, a flash light control function, and the like.

  The exposure control circuit 40 and the distance measurement control circuit 42 are controlled using the TTL method. That is, the system control circuit 50 controls the exposure control circuit 40 and the distance measurement control circuit 42 based on the calculation result obtained by calculating the captured image data by the image processing circuit 20.

  Reference numeral 50 denotes a system control circuit that controls the entire DVC 100, and reference numeral 52 denotes a memory circuit that stores constants, variables, programs, and the like for operation of the system control circuit 50.

  Reference numeral 54 denotes a display unit including a display device including a liquid crystal that displays an operation state, a message, and the like using characters, images, sounds, and the like according to execution of a program in the system control circuit 50, a speaker, and the like. The display unit 50 is installed at a single or a plurality of locations near the operation unit of the DVC 100 so as to be easily visible, and is configured by a combination of, for example, an LCD, an LED, and a sounding element.

  The display unit 54 has a part of its function installed in the optical viewfinder 104. Among the display contents of the display unit 54, what is displayed on the LCD or the like includes single shot / continuous shooting display, self-timer display, compression rate display, recording pixel number display, recording number display, and the like. In addition, the remaining number of images that can be shot, shutter speed display, aperture value display, exposure compensation display, flash display, red-eye reduction display, macro shooting display, buzzer setting display, clock battery level display, battery level display, error display, etc. There is. Furthermore, there are information display with a number of digits, display of the attachment / detachment status of the recording media 120 and 130, communication I / F operation display, date / time display, and the like.

  Among the display contents of the display unit 54, what is displayed in the optical viewfinder 104 includes in-focus display, camera shake warning display, flash charge display, shutter speed display, aperture value display, exposure correction display, and the like.

  Reference numeral 56 denotes an electrically erasable / recordable nonvolatile memory such as an EEPROM. A timer 58 is used to measure the data recording speed of the recording medium 120 or 130 and the data rate of the acquired data.

  Reference numerals 60, 62, 64, 66, 68 and 70 are operation means for inputting various operation instructions of the system control circuit 50, and may be a single unit such as a switch, a dial, a touch panel, pointing by line-of-sight detection, a voice recognition device, or the like. Consists of multiple combinations.

  Here, a specific description of these operating means will be given.

  Reference numeral 60 denotes a mode dial switch for switching and setting each function mode such as power-off, automatic shooting mode, shooting mode (including panorama shooting mode and moving image shooting mode), playback mode, multi-screen playback / erase mode, PC connection mode, and the like. I can do it.

  Reference numeral 62 denotes a shutter switch SW1, which is turned ON during operation of a shutter button (not shown), and performs AF (auto focus) processing, AE (automatic exposure) processing, AWB (auto white balance) processing, EF (flash pre-flash) processing, and the like. Instruct to start operation.

  Reference numeral 64 denotes a shutter switch SW2, which is turned on when an operation of a shutter button (not shown) is completed, and exposure in which a signal read from the image sensor 12 is written into the memory circuit 30 via the A / D converter 16 and the memory control circuit 22. Processing begins. Further, a development process using an operation in the image processing circuit 20 or the memory control circuit 22, a recording process in which the image data is read out from the memory circuit 30, compressed in the compression / decompression circuit 32, and the image data is written in the recording medium 120 or 130 The operation start of a series of processes is instructed. In the case of moving image shooting, the start / stop of moving image shooting is instructed.

  Reference numeral 66 denotes an image display ON / OFF switch which can set ON / OFF of the image display device 28. With this function, when taking an image using the optical viewfinder 104, it is possible to save power by cutting off the current supply to the image display unit including a TFT type LCD or the like.

  Reference numeral 68 denotes a quick review ON / OFF switch, which sets a quick review function for automatically reproducing image data taken immediately after photographing. In the present embodiment, it is assumed that a function for setting a quick review function when the image display device 28 is turned off is provided.

  An operation unit 70 includes various buttons and a touch panel. This includes a menu button, a set button, a macro button, a multi-screen playback page break button, a flash setting button, a single shooting / continuous shooting / self-timer switching button, and the like. Further, a menu movement + (plus) button, menu movement-(minus) button, reproduction image movement + (plus) button, reproduction image-(minus) button, and the like are also included. Furthermore, a shooting image quality selection button, an exposure correction button, a date / time setting button, and the like are also included.

  Reference numeral 80 denotes a power control circuit, which includes a battery detection circuit, a DC-DC converter, a switch circuit for switching a block to be energized, and the like. Then, the presence / absence of a battery, the type of battery, and the remaining battery level are detected, the DC-DC converter is controlled based on the detection result and the instruction of the system control circuit 50, and the necessary voltage is stored for a necessary period. Supply to each part including.

  Reference numeral 82 denotes a connector, 84 denotes a connector, and 86 denotes a primary battery such as an alkaline battery or a lithium battery, a secondary battery such as a NiCd battery, NiMH battery, or Li battery, an AC adapter, or the like.

  Reference numerals 90 and 94 denote interfaces with recording media such as memory cards and hard disks, and reference numerals 92 and 96 denote connectors for connecting to recording media such as memory cards and hard disks. Reference numeral 98 denotes a recording medium attachment / detachment detection circuit that detects whether the recording medium 120 or 130 is attached to the connectors 92 and 96.

  In the present embodiment, it is assumed that there are two systems of interfaces and connectors for attaching a recording medium. Of course, the interface and the connector for attaching the recording medium may have a single or a plurality of systems and any number of systems. Moreover, it is good also as a structure provided with combining the interface and connector of a different standard.

  The interface and the connector may be configured using a PCMCIA card, a compact flash (registered trademark) card, or the like that conforms to a standard.

  Further, the interfaces 90 and 94, and the connectors 92 and 96 can be configured by using ones conforming to a standard such as a PCMCIA card or a Compact Flash (registered trademark) card. In this case, various communication cards such as a LAN card, a modem card, a USB card, an IEEE 1394 card, a P1284 card, a SCSI card, and a communication card such as a PHS are connected. Thereby, image data and management information attached to the image data can be transferred to and from other computers and peripheral devices such as a printer.

  Reference numeral 102 denotes protection means that is a barrier that prevents the imaging unit from being soiled or damaged by covering the imaging unit including the lens 10 of the DVC 100.

  Reference numeral 104 denotes an optical viewfinder, which can take an image using only the optical viewfinder without using the electronic viewfinder function of the image display device 28. In the optical viewfinder 104, some functions of the display unit 54, for example, a focus display, a camera shake warning display, a flash charge display, a shutter speed display, an aperture value display, an exposure correction display, and the like are installed.

  A communication circuit 110 has various communication functions such as RS232C, USB, IEEE1394, P1284, SCSI, modem, LAN, and wireless communication.

  Reference numeral 112 denotes a connector for connecting the DVC 100 to other devices by the communication circuit 110 or an antenna in the case of wireless communication.

  Reference numeral 114 denotes a microphone, which is an audio data acquisition unit. Reference numeral 116 denotes an A / D conversion circuit that performs A / D conversion so that the audio data obtained by the microphone 114 can be acquired by the system control 50. Reference numeral 118 denotes a speaker, which is a sound data reproducing means. Reference numeral 120 denotes a D / A converter that D / A converts digital audio data output from the system control 50 to be reproduced by the speaker 118.

  Reference numeral 120 denotes a recording medium such as a memory card or a hard disk. The recording medium 120 includes a recording unit 122 composed of a semiconductor memory, a magnetic disk, and the like, an interface 124 with the DVC 100, and a connector 126 for connecting to the DVC 100. In addition, when the recording medium 120 is a PCMCIA standard PC-Card, CF-Card, or the like, an information storage circuit in which performance is described may be incorporated.

  Reference numeral 130 denotes a recording medium such as a memory card or a hard disk. The recording medium 130 includes a recording unit 132 composed of a semiconductor memory, a magnetic disk, and the like, an interface 134 with the DVC 100, and a connector 136 that connects to the DVC 100.

  When the recording medium 130 is a PCMCIA standard PC-Card, CF-Card, or the like, an information storage circuit describing performance may be built in.

  Next, the operation of the embodiment of the present invention will be described with reference to FIGS.

  The AVI file is configured in a RIFF (Resource Interchange File Format) format. The RIFF format is a file format of moving image file data for making various resources into one file. Even if a new format is added, the overall structure does not change and the basic structure can be maintained. Have. The file format of the RIFF format is composed of blocks called chunks as one unit. All chunks are classified as RIFF chunks, LIST chunks or sub-chunks. The RIFF chunk and the LIST chunk can recursively have a LIST chunk or a sub chunk in the data area.

  FIG. 2 shows a file format of the RIFF format. 201 is an image diagram of the RIFF chunk. 202 is a chunk ID for identifying the type of chunk. In the case of a RIFF chunk, a character string “RIFF” is set in the first 4 bytes. Also, the first chunk of the AVI file needs to be a RIFF chunk. 205 is chunk data which is a data part of the RIFF chunk. 203 is a chunk size indicating the byte length of the chunk data 205. A form type 204 is described in the first 4 bytes of the chunk data 205. In the case of an AVI file, a character string “AVI” is described.

  211 is an image diagram of the LIST chunk. 212 is a chunk ID for identifying the type of chunk. In the case of a LIST chunk, a character string “LIST” is set in the first 4 bytes. Reference numeral 215 denotes chunk data which is a data portion of the LIST chunk. Reference numeral 213 denotes a chunk size indicating the byte length of the chunk data 215. 214 is a form type described in the first 4 bytes of the chunk data 215, and the meaning of the LIST chunk is defined by the described character string.

  221 is an image diagram of a sub chunk. A sub chunk ID 222 identifies the type of sub chunk. Reference numeral 224 denotes sub chunk data which is a data portion of the sub chunk. Reference numeral 223 denotes a sub chunk size indicating the byte length of the sub chunk data 224.

  FIG. 3 shows an image diagram of an AVI file in the RIFF format. Reference numeral 301 denotes a RIFF chunk whose form type is “AVI”. The chunk data area of the RIFF chunk includes a LIST chunk 302, a LIST chunk 310, a LIST chunk 312 and a sub chunk 315. In this case, the LIST chunk 302 has a form type “hdrl”, the LIST chunk 312 has a form type “movi”, and the sub chunk 315 has a sub chunk ID “idx1”.

  The LIST chunk 302 includes a sub chunk 303, a LIST chunk 304, and a LIST chunk 307. In this case, the sub chunk 303 has a sub chunk ID “avih” and a main AVI header structure in the sub chunk data area, and the LIST chunk 304 has a form type “strl”. The LIST chunk 307 has a form type “strl”.

  The LIST chunk 310 includes a sub chunk 311 having a sub chunk ID “ISFT” and having an AVI stream header structure in the sub chunk data area. The LIST chunk 312 includes a sub chunk 313 having a sub chunk ID “01wb” and having audio data in the sub chunk data area, and a sub chunk 314 having a sub chunk ID “00dc” and having video data in the sub chunk data area. The Further, the sub-chunk having audio data and the sub-chunk having video data exist repeatedly according to the number of recorded frames.

  The LIST chunk 304 includes a sub chunk 305 and a sub chunk 306. In this case, the sub chunk 305 has a sub chunk ID “strh” and a AVI stream header structure in the sub chunk data area, and the sub chunk 306 has a sub chunk ID “strf” and a BITMAPINFO structure in the sub chunk data area. Is provided.

  The LIST chunk 307 includes a sub chunk 308 and a sub chunk 309. In this case, the sub chunk 308 has a sub chunk ID “strh” and a AVI stream header structure in the sub chunk data area, and the sub chunk 309 has a sub chunk ID “strf” and a WAVE FORMAT structure in the sub chunk data area. Is provided.

  The moving image data can be reproduced by sequentially reading and reproducing the audio data and video data of the sub chunks included in the chunk data of the LIST chunk 312 of FIG. In FIG. 3, a sub chunk 313 including audio data is audio data that is read first when an AVI file is reproduced. In FIG. 3, a sub chunk 314 including video data is video data that is read first when an AVI file is played back.

  The sub-chunk 315 in FIG. 3 is an index unit that stores the offset value on the AVI file of audio data and video data recorded in the chunk data of the LIST chunk 312 and the byte size of the audio data and video data. is there. Reference numeral 316 denotes the first entry, and 317 denotes the second entry. Each of the sub chunks 313 of the LIST chunk 312 corresponds to the entry 316, and the sub chunk 314 corresponds to the entry 317 on a one-to-one basis.

  Each entry holds various information of the sub chunks 313 and 314, and includes an ID, a flag, an offset from the top of the chunk data of the LIST chunk 312 and the size of the sub chunk data. By using entries such as the entries 316 and 317 for the reproduction of the AVI file, smooth access to the audio data and video data in the LIST chunk 312 is provided. Since there is a restriction in the standard that the size of the “AVI” RIFF chunk is less than 1 GB, a moving image file of 1 GB or more cannot be created in the AVI format.

  FIG. 4 shows an image diagram of the extended AVI file.

  The extended AVI file realizes creation of a moving image file of 1 GB or more by storing a plurality of RIFF chunks in one file. The basic structure of the extended AVI file is the same as that of the AVI file, but the following chunks are different from the AVI file.

  The leading RIFF chunk 400 is “AVI” whose form type is AVI compatible. The second and subsequent RIFF chunks 411 are “AVIX” whose form type is extended AVI.

  The first “AVI” RIFF chunk 400 includes an “odml” LIST chunk 405. The LIST chunk 405 includes a “dmlh” sub-chunk 406 having an ODML extended AVI header structure. Sub-chunk 406 has the number of frames of the entire file.

  The “movi” LIST chunk includes an “ix00” sub-chunk 407 having an AVISTANDARDINDEX structure. The sub chunk 407 has index information 408 of each video data.

  The “movi” LIST chunk includes an “ix01” sub-chunk 409 having an AVISTANDARDINDEX structure. The sub chunk 409 has index information 410 of each audio data.

  The first “AVI” RIFF chunk 400 includes an “indx” sub-chunk 401 having an AVISSUPERINDEX structure. The sub chunk 401 has a super index 402 of video data.

  The first “AVI” RIFF chunk 400 includes an “indx” sub-chunk 403 having an AVISSUPERINDEX structure. The sub chunk 403 has a super index 404 of audio data.

  Reproduction of moving image data is realized by sequentially reading and reproducing the audio data and video data of the sub chunks included in the “movi” LIST chunk of FIG.

  In FIG. 4, a sub chunk 313 including audio data is audio data that is read first when an AVI file is reproduced. In FIG. 4, the sub chunk 314 including video data is video data that is read first when the AVI file is reproduced.

  The “ix00” sub-chunk 407 and the “ix01” sub-chunk 409 in FIG. 4 store the offset value and byte size of the audio data and the video data recorded in the “movi” LIST chunk from the beginning of the chunk data. It is an index part to keep. Reference numeral 408 denotes an entry of the first video data, and 410 denotes an entry of the first audio data. The entries correspond to the sub chunk 314 and the sub chunk 313 of the “movi” LIST chunk on a one-to-one basis.

  The “indx” sub-chunk 401 and the “indx” sub-chunk 403 store the offset value and byte size on the file of the “ix00” sub-chunk 407 and the “ix01” sub-chunk 409. This is an index part for an index called a super index. Reference numeral 402 denotes an index information entry of the first video data, and 404 denotes an index information entry of the first audio data.

  When playing back an extended AVI file, first, the index section of the audio data and video data is accessed by using the “indx” sub-chunk 401 and the “indx” sub-chunk 403. Thereafter, by using the “ix00” sub-chunk 407 and the “ix01” sub-chunk 409, the audio data and the video data are accessed. For this reason, the extended AVI format does not require the “idx1” LIST chunk in the AVI format.

  FIG. 5 shows an image diagram of a moving image format file according to the embodiment of the present invention.

  The first “AVI” RIFF chunk 500 includes a “movi” LIST chunk. In the moving image format according to the embodiment of the present invention, the “ix00” sub-chunk 407 and the “ix01” sub-chunk 409 in the “movi” LIST chunk are arranged immediately after the audio data and the video data.

  Immediately after the “movi” LIST chunk, an “idx1” sub-chunk 501 is arranged in a format compliant with the AVI format standard. The “idx1” sub-chunk 501 is an index part for storing the offset value on the AVI file of the audio data and video data recorded in the “movi” LIST chunk, and the byte size of the audio data and video data. .

  Reference numeral 502 denotes the first entry, and reference numeral 503 denotes the second entry. The entry “502” is assigned to the “01wb” sub-chunk in the “movi” LIST chunk, and the entry 503 is assigned to the “00dc” sub-chunk. It corresponds with.

  However, the “idx1” sub-chunk 501 includes only the index information of the head audio data and video data, and does not include the subsequent index information. Therefore, the information that the “idx1” sub chunk 501 has is a part of the information that the “ix00” sub chunk 407 and the “ix01” sub chunk 409 have. In the subsequent “AVIX” RIFF chunk, similarly, the “ix00” sub-chunk 407 and the “ix01” sub-chunk 409 are arranged immediately after the audio data and the video data.

  Further, immediately after the “movi” LIST chunk in the “AVIX” RIFF chunk, the “idx1” sub-chunk is not arranged, but the “JUNK” sub-chunk 504 is arranged. The “JUNK” sub-chunk 504 is padding data having the same size as the “idx1” sub-chunk 501 and is an area that is not used when a moving image is reproduced.

  The moving image format according to the present invention includes the index information 501 in a format compliant with the AVI format standard. Therefore, even an application that does not support the extended AVI format can be recognized as an AVI format moving image file if it supports the AVI format. The index information 501 includes only information for one entry each of audio data and video data. Since it is not the information of all entries but the minimum information that can be recognized as a moving image file in AVI format, an increase in the moving image file size can be suppressed.

  Also, padding data is arranged in the second and subsequent “AVIX” RIFF chunks. Therefore, even if the index information 501 is deleted during moving image editing, the padding data area can be used as new index information, and the load during moving image editing can be reduced. Details of the processing during moving image editing will be described later.

  In the moving image format according to the embodiment of the present invention, index information related to audio data and video data is arranged immediately after the audio data and video data. When performing moving image shooting, the acquired audio data and video data are sequentially recorded according to a predetermined moving image format. When the moving image shooting is completed, index information relating to the recorded audio data and video data is created and recorded. Therefore, the contents and size of the index information are not determined until the moving image shooting is completed.

  When the index information is arranged in front of the audio data and the video data, it is necessary to reserve and record the index information area in advance at the start of moving image shooting, which causes an increase in unnecessary areas in the moving image file. Therefore, by arranging the index information immediately after the audio data and the video data, it is not necessary to secure a useless index information area at the time of moving image shooting, and an increase in the moving image file size can be suppressed.

  FIG. 6 is a flowchart for explaining processing for generating moving image file format data according to the embodiment of the present application shown in FIG.

  In FIG. 6, after the processing is started, in step S <b> 61, a first index information unit that conforms to the first standard is generated based on the moving image data. Next, in step S62, a second index information part based on the second standard compatible with the first standard is generated. Further, in step S63, a moving image data index part composed of moving image data and a first index information part is generated. Next, in step S64, the second index information part is arranged immediately after the top moving picture data index part of the moving picture format file. In step S65, the second index information part is arranged immediately after the leading moving image data index part. A padding data area having the same size as that of the second index information part is arranged immediately after the second and subsequent moving image data index parts. In step S67, moving image format data is created by generating a moving image format file including one or a plurality of moving image data index sections, and the process ends. These processes do not necessarily have to be the order of the steps shown in FIG. These processing steps are executed by the system control circuit 50 in accordance with, for example, a program describing the processing procedure shown in FIG. This program may be stored in the memory circuit 52, for example. The generated moving image format data is recorded on the recording medium 120 or 130, for example.

  Next, the processing at the time of moving image reproduction according to the present invention will be described with reference to FIGS. FIG. 7 is a flowchart of processing during reproduction of a moving image according to the present invention.

  In the DVC 100, when the playback mode is set by operating the mode dial switch 60, the image playback unit in the system control unit 50 displays an image on the image display device 28 (step S101). After the image display, an input from the operation unit 70 is accepted (step S102). When the image is fed, an image to be displayed next is read according to the input (step S103), and the process returns to step S101. When a moving image is displayed as a result of image forwarding, it is possible to shift to a moving image mode in which an operation on the moving image can be instructed. It is determined whether or not an instruction to shift to the moving image mode is instructed by the user's operation (step S104).

  When the transition to the moving image mode is instructed, the moving image information is read (step S105), and the display indicating the moving image mode is performed (step S106). Here, when the moving image information is read in S105, areas for a header buffer, a video index and an audio index, a video data buffer, and an audio data buffer are secured in the internal memory 30 as shown in FIG.

  In the moving image playback process according to the embodiment of the present invention, each “ix00” sub-chunk in the extended AVI format is stored in the video index area, and each “ix01” sub-chunk is stored in the audio index area. As described above, the video index and the audio index are stored together in advance, so that subsequent access to the video data and audio data can be performed smoothly. In the moving image mode display, the moving image panel is displayed, and the moving image panel is operated by receiving an input from the operation unit 70 (step S107).

  The moving image panel is a GUI that executes operations such as moving image playback, editing, frame advance, and frame return. When frame advance, frame return, or the like is selected here, the instructed video data is read with reference to a previously stored index, displayed on the image display device 28 (step S108), and the process returns to step S106. When the moving image panel is operated and the moving image mode end is selected, the moving image mode is ended and the process returns to step S101. When reproduction start is selected in step S107, the moving image is reproduced (step S109). In step S109, the video data and the audio data are sequentially read into the video data buffer and the audio data buffer with reference to the index stored in advance, and are reproduced by the image display unit and the audio reproduction unit.

  Whether moving image stop is selected by operating the moving image panel during moving image reproduction (step S110), or when moving image reproduction ends (step S111), moving image reproduction is stopped (step S112), and step S106. Return to. If the moving image reproduction is not stopped, the process returns to step S109 to continue the moving image reproduction. When the start of moving image editing is selected in step S107, the process proceeds to a mode for editing a moving image (step S113).

  Next, processing during editing of moving image data according to the present invention will be described with reference to FIG. FIG. 9 is a flowchart of processing when editing moving image data according to the embodiment of the present invention.

  In the DVC 100, when the moving image editing mode is set, the editing mode is displayed (step S201). After the edit mode is displayed, the edit panel is displayed, and an input from the operation unit 70 is accepted to operate the edit panel (step S202). The editing panel is a GUI that executes editing processing such as first half cut and second half cut of a moving image, saving processing of a moving image file after the editing processing, and the like.

  When the moving image editing process is selected in step S202, it is confirmed whether or not the moving image editing is to be executed (step S203). If the moving image editing process is executed, a storage portion after the moving image editing process is set and the process proceeds to step S201. Return. When the moving image saving process is selected in step S202, the edited moving image is saved. It is determined whether the editing is to cut the first half of the moving image (step S205). If the first half cut is not instructed, the process proceeds to step S211. If the first half cut is instructed, it is determined whether or not the first “AVI” RIFF chunk is deleted (step S206). If the “AVI” RIFF chunk is not deleted, the process proceeds to step S209.

  When the “AVI” RIFF chunk is deleted, the first “AVIX” RIFF chunk after editing is changed to a new “AVI” RIFF chunk (step S207). Next, the “JUNK” sub-chunk in the RIFF chunk changed to “AVI” in step S207 is changed to a new “idx1” sub-chunk (step S208). When the first half of the moving image is cut, the sizes and offsets of the audio data and video data are changed. Therefore, it is necessary to edit the extended AVI format index portion and the AVI format index portion. First, in the extended AVI format index portions “ix00” and “ix01”, editing such as entry deletion and offset position change is performed (step S209).

  Next, in the AVI format index part “idx1”, the first one entry is extracted from “ix00” and “ix01” in the same “movi” list, and converted into the AVI format (step S210). When the first half cut processing is completed, it is then determined whether the editing is to cut the second half of the moving image (step S211). If the second half cut is not instructed, the process proceeds to step S213.

  When the latter half of the moving image is cut, the size and offset of the audio data and video data are changed, so that it is necessary to edit the extended AVI format index portion. Here, in the extended AVI format index parts “ix00” and “ix01”, editing such as entry deletion is performed (step S212). When the second half cut processing is completed, the edited moving image file is stored (step S213), and the process returns to step S201. When the edit mode end is selected in step S202, the edit mode is ended and the reproduction mode is entered.

  As described above, in the moving image format according to the present invention, padding data is arranged in the second and subsequent “AVIX” RIFF chunks. Therefore, even if the index information is deleted during moving image editing, the padding data area can be used as new index information, and the load during moving image editing can be reduced.

  The embodiment of the present invention has been described above with reference to FIGS. As described above, according to the moving image format of the present embodiment, compatibility can be maintained even in an application that does not support the higher standard, and efficient file size and moving image editing processing can be realized.

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

  As a storage medium for supplying the program code, for example, a flexible disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD-R, magnetic tape, nonvolatile semiconductor memory card, ROM, or the like can be used. . Further, the functions of the above-described embodiments may be realized by executing the program code read by the computer.

  However, when the OS (operating system) operating on the computer performs part or all of the actual processing based on the instruction of the program code, and the functions of the above-described embodiments are realized by the processing. Needless to say, is also included.

  Furthermore, the program code read from the storage medium may be written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. After that, based on the instruction of the program code, the CPU of the function expansion board or function expansion unit performs part or all of the actual processing, and the processing of the above-described embodiment is realized by the processing. Needless to say.

It is a block diagram which shows an example of a structure of DVC which can apply the moving image format file which concerns on one Embodiment of this invention. It is a figure for demonstrating the file format of a RIFF format. It is an image figure of the AVI file of a RIFF format. It is an image figure of the extended AVI file of a RIFF format. It is an image figure of the moving image format file which concerns on embodiment of this invention. It is a figure explaining the process which produces | generates the moving image format file which concerns on embodiment of this invention. It is a flowchart figure of the process at the time of the moving image reproduction in the moving image reproduction which concerns on embodiment of this invention. FIG. 6 is an image diagram when moving image information is read into an internal memory during moving image reproduction according to an embodiment of the present invention. It is a flowchart figure of the process at the time of the moving image edit in the moving image reproduction which concerns on embodiment of this invention.

Claims (17)

A first index information section generating step for generating a first index information section compliant with the first standard, including management information of moving image data;
A moving image data index portion generating step for generating a moving image data index portion composed of the moving image data and the first index information portion;
A moving image format file generating step for generating a moving image format file composed of one or a plurality of moving image data index units,
Including the management information before the Symbol moving image data, and the second index information unit generating step of generating second index information section conforming to the second standard is a lower standard of the first standard,
A second index information section arranging step of arranging the second index information section generated in the second index information section generating step immediately after the leading moving picture data index section in the moving picture format file; Prepared ,
Management information included in the second index information part, and the part of the management information contained in the first index information section, the second feature information der Rukoto converted to a format complying with standards Generation method of moving image format file. 2. The moving image according to claim 1, wherein the second index information section includes minimum information for recognizing the moving image format file as a moving image format file compliant with the second standard. Format file generation method. The moving image according to claim 1, wherein the moving image data includes a plurality of pieces of video data, and the second index information unit includes management information related to one piece of video data among the plurality of pieces of video data. Format file generation method. The method of generating a moving image format file according to claim 3, wherein the second index information section includes management information related to the first video data among the plurality of video data. A padding data area having a size corresponding to the size of the second index information part arranged in the second index information part arranging step is arranged immediately after the second and subsequent moving picture data index parts in the moving picture format file. further comprising, a method of generating a moving image format file according to any one of claims 1 to 4, characterized in that the padding data area allocation process, the of. A determination step of determining whether or not the second index information part is deleted by the editing instruction when editing to delete a part of the moving image format file is instructed;
  When it is determined in the determination step that the second index information part is deleted by the editing instruction, a part of the moving image format file is deleted, and the padding data area is replaced with new second index information. 6. The method of generating a moving image format file according to claim 5, further comprising an editing step of executing an editing process to include management information of the moving image data. In the moving image data index generation step,
The moving image format file according to any one of claims 1 to 6, wherein the moving image data index portion is generated by arranging the first index information portion immediately after the moving image data. Generation method. The moving image format according to any one of claims 1 to 7 , wherein the first index information section conforms to an extended AVI standard, and the second index information section conforms to an AVI standard. How to generate the file. Storage medium the moving image format file generated by the generation method of the moving image format file according to any one of claims 1 to 8, characterized in that stored. First index information section generating means for generating a first index information section conforming to the first standard, including management information of moving image data;
A moving image data index section generating means for generating a moving image data index section composed of the moving image data and the first index information section;
In a moving image format file generating apparatus, comprising: a moving image format file generating unit that generates a moving image format file composed of one or a plurality of the moving image data index units,
Including the management information before the Symbol moving image data, and the second index information unit generating means for generating a second index information section conforming to the second standard is a lower standard of the first standard,
A second index information section arranging means for arranging the second index information section generated by the second index information section generating means immediately after the leading moving picture data index section in the moving picture format file; Prepared ,
Management information included in the second index information part, and the part of the management information contained in the first index information section, the second feature information der Rukoto converted to a format complying with standards A video format file generation device. 11. The moving image according to claim 10, wherein the second index information section includes minimum information for recognizing the moving image format file as a moving image format file compliant with the second standard. Format file generator. The moving image according to claim 10, wherein the moving image data includes a plurality of pieces of video data, and the second index information unit includes management information related to one piece of video data among the plurality of pieces of video data. Format file generator. 13. The moving image format file generation apparatus according to claim 12, wherein the second index information section includes management information related to the first video data among the plurality of video data. Immediately after the second and subsequent moving image data index portions in the moving image format file, a padding data area having a size corresponding to the size of the second index information portion disposed by the second index information portion disposing means is disposed. The moving image format file generation device according to claim 10 , further comprising: a padding data area arrangement unit that performs the operation. A determination unit that determines whether or not the second index information part is deleted by the editing instruction when editing to delete a part of the moving image format file is instructed;
  When it is determined by the determination means that the second index information part is deleted by the editing instruction, a part of the moving image format file is deleted and the padding data area is replaced with new second index information. 15. The moving image format file generation device according to claim 10, further comprising an editing unit configured to execute an editing process including management information of the moving image data. . The moving image data index part generating means includes:
The moving image format file according to any one of claims 10 to 15, wherein the moving image data index portion is generated by arranging the first index information portion immediately after the moving image data. Generator. The moving image format according to any one of claims 10 to 16 , wherein the first index information part conforms to an extended AVI standard and the second index information part conforms to an AVI standard. File generator.

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