JP2018195946A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily cut out a section of a desired frame rate. Control is performed so that encoded moving images are simultaneously recorded on first and second recording media. When there is an instruction to change the playback speed when the moving picture being recorded is played back to the predetermined playback speed during simultaneous recording of the moving pictures on the first and second recording media, the first and second Control is performed so as to change the frame rate of the moving image encoded by the encoding means to a predetermined frame rate corresponding to a predetermined reproduction speed, and to record a moving image having a predetermined frame rate. The frame rate of the moving image data being recorded simultaneously is changed in units of the number of frames that is the least common multiple of the number of frames of the moving image encoding mode recorded simultaneously on the first and second recording media. [Selection] Figure 1

Description

  The present invention relates to a recording apparatus.

  2. Description of the Related Art Conventionally, there has been known an imaging device that realizes a fast motion effect or a slow motion effect of a captured moving image by switching a frame rate at the time of shooting (see Patent Document 1). Patent Document 1 discloses a device that arbitrarily switches the frame rate during shooting of a moving image.

  As a moving image compression method, a method that selectively uses an intra-frame compression method such as MPEG or an inter-frame compression method is known. By compressing a combination of the intra-frame compression method and the inter-frame compression method, the moving image can be efficiently compressed.

  When editing a moving image compressed in this way, it is necessary to perform necessary processing after decoding it and then compress it again. However, in such a method, since the editing process takes time, when performing simple editing such as deleting a part of a moving image, editing is performed in units of GOP without decoding. In this case, the editable unit is a GOP unit. Since 1 GOP is often composed of 15 frames, the editing unit is also 15 frames.

JP2015-122734

  However, when a moving image shot so that the frame rates of some sections are different as in Patent Document 1, the frame rate switching position may be in the middle of the GOP.

  For this reason, there is a problem that it is not possible to perform editing in which only a desired slow motion effect or fast motion effect section is easily cut out.

  The present invention provides an apparatus that can solve such problems.

  An imaging unit; a unit for encoding moving image data obtained by the imaging unit; a first encoding unit having a plurality of encoding modes having different number of frames as a unit of encoding; and the imaging unit Means for encoding the moving image data obtained by the second encoding means having the plurality of encoding modes, and the moving image data encoded by the first encoding means in the first recording. A first recording means for recording on the medium; a second recording means for recording the moving image data encoded by the second encoding means on the second recording medium; Any one of the encoding modes is set as the encoding mode of the first encoding means, and any one of the plurality of encoding modes is set as the encoding mode of the second encoding means, and the setting Said coding mode The moving image data encoded by the first encoding unit and the second encoding unit is controlled to be recorded simultaneously on the first recording medium and the second recording medium, and the first When there is an instruction to change the reproduction speed when reproducing the moving image data being recorded to a predetermined reproduction speed during the simultaneous recording of the moving image data on the recording medium and the second recording medium, The frame rate of the moving image data encoded by each of the first encoding unit and the second encoding unit is changed to a predetermined frame rate corresponding to the predetermined reproduction double speed, and the moving image data having the predetermined frame rate is changed. Control means for performing control so as to record, wherein the control means has a minimum number of frames in an encoding mode of moving image data simultaneously recorded on the first recording medium and the second recording medium. The number of frames comprising a multiple units, performs control to change the frame rate of the moving image data in the simultaneous recording.

  According to the present invention, a section of a desired frame rate can be easily cut out from an encoded moving image.

It is a block diagram which shows a recording device. It is a figure explaining encoding mode. It is a figure which shows the flame | frame encoded by section slow & fast mode. It is a flowchart which shows a recording process. It is a figure which shows the flame | frame encoded by section slow & fast mode. It is a figure which shows the display screen in area slow & fast mode. It is a block diagram which shows a recording device. It is a flowchart which shows a recording process. It is a figure which shows the flame | frame encoded by section slow & fast mode. It is a figure which shows the display screen in area slow & fast mode.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration example of a recording apparatus 100 according to the present embodiment.

  In FIG. 1, an imaging unit 101 inputs an image from an imaging element. In the present embodiment, the imaging unit 101 outputs moving image data in which one frame is 1920 horizontal pixels × 1080 vertical pixels. The imaging unit 101 outputs moving image data at 30 frames per second (fps) in the normal moving image recording mode. In the section slow & fast mode, which will be described later, 60 fps video data is output.

  The control unit 102 controls the entire operation of the recording apparatus 100 in response to an input from the operation unit 103. The control unit 102 includes a microcomputer, a memory, and the like, and controls the recording device 100 according to a computer program (hereinafter, software) recorded in a non-illustrated nonvolatile memory.

  The control unit 102 has a built-in recording medium interface for communicating data and commands with the recording unit 106. The operation unit 103 includes various switches that can be operated by the user. The operation unit 103 includes a power switch, a switch for instructing start and stop of recording, and a frame rate switching, a switch for switching the mode of the recording apparatus 100, and the like.

  At the time of recording, the first encoding processing unit 104 converts the moving image data obtained by the imaging unit 101 to H.264. It is encoded according to a known encoding format such as H.264 / MPEG4 AVC, and the amount of information is compressed. Further, processing necessary for recording an image is performed. In addition, the first encoding processing unit 104 has a plurality of encoding modes of a first encoding mode and a second encoding mode. In the first encoding mode, the first encoding processing unit 104 encodes all the frames of the moving image data by the intra-frame encoding method. That is, in the first encoding mode, the encoding unit is one frame. The intraframe coding method is a method of performing coding using only data in the same frame without referring to other frames.

  In the second coding mode, the first coding processing unit 104 performs coding using both intraframe coding and interframe coding. In this embodiment, one GOP that is a unit of the encoding process is composed of 15 frames. One GOP includes one frame of I picture. That is, in the second encoding mode, 15 frames are the encoding unit. In this embodiment, a frame of one GOP is encoded as a Closed GOP that does not use a frame of another GOP as a reference frame.

  2A shows each frame of moving image data encoded in the first encoding mode, and FIG. 2B shows each frame of moving image data encoded in the second encoding mode. . In FIG. 2B, the frames are displayed in the display order. In FIG. 2, a frame labeled I is a frame that is encoded by intraframe encoding. A frame indicated by B is a frame encoded by inter-frame encoding of bidirectional prediction, and a frame indicated by P is a frame encoded by inter-frame encoding of forward prediction. The first encoding processing unit 104 decodes and outputs the reproduced moving image data during reproduction.

  The memory 105 holds image data. Each block of the recording apparatus 100 processes the image data by accessing the memory 105. The memory 105 stores file system information and various types of information in addition to image data, and further serves as a work memory for control by the control unit 102.

  The first recording / reproducing unit 106 records the image data stored in the memory 105 or various information on the first recording medium 108. The first recording medium 108 is a random access recording medium such as a flash memory card. The first recording medium 108 can be easily discharged and mounted on the imaging apparatus 100 by a mounting / discharging mechanism (not shown).

  The first recording / playback unit 106 manages the image data and various information recorded on the first recording medium 108 as files according to a file system such as FAT32 or exFAT. The frame rate conversion unit 107 converts the frame rate by thinning out frames of moving image data input from the imaging unit 101. The display unit 109 displays moving images and various types of information on a display device such as a liquid crystal panel. The data bus 110 is used to transmit and receive data and various control commands between the units of the recording apparatus 100.

  The image processing unit 114 performs known processing such as development processing, white balance, and gamma correction on the moving image data obtained by the imaging unit 101 during recording. In addition, a display image to be displayed on the display unit 109 is also generated.

  At the time of recording, the second encoding processing unit 113 converts the moving image data obtained by the imaging unit 101 to H.264. It is encoded according to a known encoding format such as H.264 / MPEG4 AVC, and the amount of information is compressed. Further, processing necessary for recording an image is performed. Similarly to the first encoding processing unit 104, the second encoding processing unit 104 has a first encoding mode and a second encoding mode.

  The second recording / reproducing unit 111 records image data or various information stored in the memory 105 on the second recording medium 112. The second recording medium 112 is a random access recording medium such as a flash memory card. The second recording medium 112 can be easily discharged and mounted on the imaging apparatus 100 by a mounting / discharging mechanism (not shown). The second recording / playback unit 111 manages image data and various information recorded on the second recording medium 112 as a file according to a file system such as FAT32 or exFAT.

  In addition, the first recording / reproducing recording unit 106 and the second recording / reproducing unit 111 have a known interface (IF) such as AT Attachment. When writing a moving image file to the first recording medium 108, the control unit 102 controls the first recording unit 106 to reproduce file system data (management data) from the first recording medium 108. And stored in the memory 105. This file system data is data for displaying the file name, file size, and data recording address of data recorded on the first recording medium 108, and is information for managing the file. In addition, when writing a moving image file to the second recording medium 112, the control unit 102 controls the second recording / reproducing unit 111 so that file system data (management data) is transmitted from the second recording medium 112. Is stored in the memory 105.

  The control unit 102 analyzes the file system data stored in the memory 105 to identify whether the file system is FAT32 or exFAT, and switches control. The control unit 102 controls file writing and reading according to the read file system data. The control unit 102 updates the file system data stored in the memory 105 in accordance with the writing of the file to the first recording medium 108 and the second recording medium 112. The updated file system data is recorded on the recording medium 108 by the first recording / reproducing unit 106 and recorded on the recording medium 112 by the second recording / reproducing unit 111.

  Further, the user can instruct to switch the operation mode of the recording apparatus 100, start or stop recording of moving image data, or switch the frame rate by operating the operation unit 103.

  Next, the recording operation in this embodiment will be described. When receiving an instruction to shift to the normal recording mode of moving image data from the control unit 102, the recording apparatus 100 is shifted to a recording standby state. In the recording standby state, the imaging unit 101 outputs moving image data, and the image processing unit 114 processes the output moving image data and stores it in the memory 105. The display unit 109 reads the moving image data from the memory 105 and displays it. Thus, in the recording standby state, the moving image obtained by the imaging unit 101 is displayed on the display unit 109 as a live view image. The user can set the recording mode of the imaging apparatus 100 in the recording standby state.

  In the present embodiment, the imaging apparatus 100 has a normal recording mode. In the normal recording mode, moving image recording is started in response to a recording start instruction from the user, and moving image recording is stopped in response to a recording stop instruction. In the normal recording mode, the frame rate of the moving image to be recorded is the same from the start of recording to the stop of recording, and cannot be changed by the user. The frame rate of moving image data recorded in the normal recording mode is 60 fps.

  In addition, the user can select either the first recording medium 108 or the second recording medium 112 as a recording destination in the recording standby state. Further, the recording apparatus 100 has a simultaneous recording function of recording a moving image on both the first recording medium 108 and the second recording medium 112. The user can set the simultaneous recording function by operating the operation unit 103 in the recording standby state.

  Also, the user can set either the first encoding mode or the second encoding mode as the encoding mode when recording a moving image in the recording standby state. Further, when the simultaneous recording function is set to be effective, the user can independently set the encoding mode of the moving image to be recorded on the first recording medium 108 and the encoding mode of the moving image to be recorded on the second recording medium 112. Can be set. The control unit 102 stores these setting states set by the user in the memory 105.

  First, normal recording mode processing will be described. In the recording standby state, when the operation unit 112 is operated and there is an instruction to start recording a moving image, the control unit 111 controls each unit to start recording the moving image.

  The imaging unit 101 outputs moving image data of 60 fps. The moving image data from the imaging unit 101 is processed by the image processing unit 114 and temporarily stored in the memory 105. The first encoding processing unit 104 and the second encoding processing unit 113 encode the moving image data stored in the memory 105 according to the encoding mode set as described above, and store the encoded video data in the memory 105. . For example, when the first recording medium 108 is selected as the recording destination, the first encoding processing unit 104 encodes the moving image, but the second encoding processing unit 113 does not perform the encoding process. When the second recording medium 112 is selected as the recording destination, the second encoding processing unit 113 encodes the moving image, but the first encoding processing unit 104 does not perform the encoding process. When simultaneous recording is set, the first encoding processing unit 104 and the second encoding processing unit 113 each encode moving image data according to the set encoding mode.

  When the first recording medium 108 is selected as the recording destination, the recording / playback unit 106 reads the encoded moving image data from the memory 105 and records it on the first recording medium 108. When the second recording medium 112 is selected as the recording destination, the recording / reproducing unit 111 reads the encoded moving image data from the memory 105 and records it on the second recording medium 112. When simultaneous recording is set, the first recording / playback unit 106 and the second recording / playback unit 111 read the encoded moving image data from the memory 105, respectively, To the recording medium 112. When recording is performed in this way and the user instructs to stop recording, the control unit 102 controls each unit to stop recording.

  Further, the imaging apparatus 100 has a predetermined recording mode in which the frame rate of a moving image to be recorded can be changed according to a user instruction between the start of recording and the stop of recording. Hereinafter, this predetermined recording mode is referred to as a section slow & fast mode.

  In the section slow & fast mode, the user can instruct to change the playback double speed during playback of the recorded moving image by operating the operation unit 103 during recording of the moving image. In the present embodiment, when reproducing moving image data recorded in the section slow & fast, the reproduced moving image data is displayed at a predetermined reproduction frame rate. The predetermined playback frame rate is 30 fps. For this reason, a moving image of 30 fps that is the same as the playback frame rate is set to a 1 × speed moving image.

  In the segment slow & fast mode, the user can specify the playback speed of one of ½ speed slow, 1 × speed, and 2 × speed while recording the video, thereby reproducing the playback speed of the recorded video. Can be instructed to change.

  When the frame rate of the recorded moving image is 60 fps, it is displayed on the display unit 109 as a slow playback (low speed) image of 1/2 times speed. In addition, when the frame rate of the recorded moving image is 15 fps, it is displayed on the display unit 109 as a double-speed fast playback (high-speed) image. That is, the frame rate corresponding to 1/2 speed is 60 fps, and the frame rate corresponding to 2 times speed is 15 fps.

  The user can set the section slow & fast mode by operating the operation unit 103 in the recording standby state. When the section slow & fast mode is set, the state transits to the recording standby state and waits for a recording start instruction. When the section slow & fast mode is set, the control unit 102 instructs the imaging unit 101 to output moving image data of 60 fps.

  The frame rate conversion unit 107 outputs 30fps single-speed moving image data by thinning out 60fps moving image data from the imaging unit 101 every other frame. In such a recording standby state, the frame image output from the imaging unit 101 is displayed on the display unit 109.

  When a recording start instruction is input from the operation unit 103, the moving image data from the imaging unit 101 is subjected to frame rate conversion processing by the frame rate conversion unit 107 and stored in the memory 105. At the start of recording, the frame rate conversion unit 107 thins out a frame input at 60 fps once every two times and stores it in the memory 105 as 30 fps. The first encoding processing unit 104 and the second encoding processing unit 113 encode moving image data as described above and store the encoded data in the memory 105. The first recording / playback unit 106 and the second recording / playback unit 111 read the encoded data from the memory 105 and record them as a moving image file on the first recording medium 108 and the second recording medium 112 as a moving image of 30 fps.

  As described above, when the user operates the operation unit 103 to start changing the frame rate after starting the recording of the moving image data, the control unit 102 performs the moving image by the frame rate conversion unit 107 according to the user instruction. Change the data thinning rate. The frame rate conversion unit 107 thins out and outputs the frames of the moving image from the imaging unit 101 according to the thinning rate specified by the control unit 102.

  FIG. 3 is a diagram showing a moving image recorded in the section slow & fast mode. Reference numeral 301 in FIG. 3A indicates moving image data output from the imaging unit 101 in the section slow & fast mode. As described above, in the section slow & fast mode, the imaging unit 101 outputs moving image data of 60 fps. The frame interval is 1/60 second.

  Reference numeral 302 in FIG. 3B indicates 1 × speed moving image data. When recording a 1 × speed moving image, the frame rate conversion unit 107 thins out 60 fps moving image data from the imaging unit 101 every other frame, and outputs 30 fps moving image data. In this case, the frame decimation rate is 1 frame per 2 frames. The frame update interval is 1/30 second.

  Reference numeral 303 in FIG. 3C denotes a moving image that is recorded when a 1 / 2-speed slow instruction is given during 1-speed recording. During the 1 × speed period, the frame rate conversion unit 107 thins out 60 fps moving image data from the image capturing unit 101 every other frame, and outputs 30 fps moving image data. Then, when there is an instruction of a half-speed slow moving image, the frame rate conversion unit 107 outputs a 60 fps moving image by outputting the frame A5 without thinning out the frame. The frame update interval is 1/60 seconds. Thereafter, when there is a change instruction for 1 × speed, the frame rate conversion unit 107 thins out every other frame from the frame A101 and outputs it.

  Reference numeral 304 in FIG. 3D indicates a moving image that is recorded when there is a double-speed fast instruction during single-speed recording. During the 1 × speed period, the frame rate conversion unit 107 thins out 60 fps moving image data from the image capturing unit 101 every other frame, and outputs 30 fps moving image data. Then, when there is an instruction for a double-speed fast moving image, the frame rate conversion unit 107 outputs a moving image of 15 fps by thinning out 3 frames out of 4 frames from the frame A5. The frame update interval is 1/15 seconds. Thereafter, when there is a change instruction for 1 × speed, the frame rate conversion unit 107 thins out every other frame from the frame A101 and outputs it.

  Hereinafter, the processing in the section slow & fast mode will be described using the flowchart of FIG. Note that the processing in FIG. 4 is executed by the control unit 102 controlling each unit.

  The processing of FIG. 4 is started when the recording apparatus 100 is in the activated state, set to the section slow & fast mode, and instructed to start recording by the operation unit 103. The control unit 103 acquires the minimum recording unit at the time of recording a moving image according to the encoding mode (S401). In the first encoding mode, each frame of the encoded moving image can be decoded with only one frame of data. Therefore, when the first encoding mode is set, the minimum recording unit is one frame. In the second encoding mode, the encoding unit of moving image data is 15 frames of 1 GOP. Therefore, when the second encoding mode is set, the minimum recording unit is set to 15 frames. When the simultaneous recording is set, the control unit 102 acquires the minimum recording unit for each recording medium based on the encoding mode set for each recording medium.

  Next, the control unit 102 determines whether or not simultaneous recording is set (S402). If simultaneous recording is set, the least common multiple of the minimum recording unit for each recording medium is set as the recording unit (S403). When the first encoding mode is set as the encoding mode of the first recording medium 108 and the second encoding mode is set as the encoding mode of the second recording medium 112, 1 frame and 15 frames 15 frames which are the least common multiple of are set as recording units. If simultaneous recording is not set, the control unit 102 sets the minimum recording unit acquired in S401 as a recording unit (S404).

  At the start of recording, the control unit 102 sets the thinning rate to ½, which is the thinning rate of 1 × speed (S405). Therefore, the frame rate conversion unit 107 converts 60 fps moving image data to 30 fps. Next, the control unit 102 opens a moving image file for the recording medium selected as the recording destination, and starts encoding and recording of the moving image (S406).

  After starting the recording, the control unit 102 determines whether or not there is an instruction to stop the recording from the operation unit 103 (S407). When recording stop is instructed by the user, the frame rate of the moving image data to be recorded is switched to the frame rate corresponding to the current playback double speed until the number of encoded frames becomes an integral multiple of the recording unit. Recording is continued (S412). When encoding is performed up to a frame that is an integral multiple of the recording unit, the encoding and recording of the moving image are stopped, and the file is closed (S413).

  If there is no instruction to stop recording, the control unit 102 determines whether or not there is an instruction to change the playback double speed of the moving image by the operation unit 103 (S408). If there is no change instruction, recording of the moving image at the current frame rate is continued. Also, if there is a change instruction, the control unit 102 has started encoding a moving image at a frame rate corresponding to the current playback double speed, and then whether the number of encoded frames has become an integral multiple of the recording unit. It is determined whether or not (S409). When the number of frames that is an integral multiple of the recording unit is encoded, the decimation rate of the frame rate conversion unit 107 is changed from the next frame in accordance with the changed reproduction speed (S411). Then, the moving image recording is continued at the changed frame rate. If there is an instruction to stop recording until the number of encoded frames becomes an integral multiple of the recording unit (S410), the current frame rate is maintained until the number of encoded frames reaches an integral multiple of the recording unit. Continue recording the video and stop recording.

  FIG. 5 is a diagram showing a moving image that is recorded when simultaneous recording is performed in the section slow & fast mode. Reference numeral 501 in FIG. 5 denotes a moving image recorded on the first recording medium 106, which is first encoded in the encoding mode. Reference numeral 502 denotes a moving image recorded on the second recording medium 112, which is encoded in the second encoding mode.

  If there is an instruction to change to a half-speed slow movie at the time of 503 while recording a normal-speed movie, the movie is recorded at a single-speed up to frame A33, which is a recording unit, and is half-speed from frame A34. Change to slow video.

  Here, when the simultaneous recording is not set and the moving image encoded in the first encoding mode is recorded on the first recording medium 106, the recording unit is one frame. From the frame A31 immediately after the instruction to change the playback double speed, the slow motion video becomes 1/2 speed. On the other hand, when the simultaneous recording is set as described above, the recording of the moving image at 1 × speed is continued until it becomes an integral multiple of 15 frames as a recording unit, not from the frame A31.

  FIG. 6 is a diagram showing a display screen of the display unit 109 in the section slow & fast mode. FIG. 6A shows a UI display of the recording setting screen. As indicated by reference numeral 6101, it is possible to select a recording mode in normal recording or magnification change recording in which the magnification can be changed during recording. When the operator selects a recording mode, the screen transitions to the display screen of FIG.

  FIG. 6B is a display screen in a recording standby state. The remaining recording time 6201 of the first recording medium 108 (card 1) and the second recording medium 112 (card 2), the operation status 6202 of the recording apparatus 100 (● is recording, and if ● is not displayed, it is not recording. ), The time code 6203 and the like are displayed. Reference numeral 6204 denotes a button for designating each reproduction double speed. The user can instruct to change the playback double speed by operating the operation unit 103 and designating any button.

  FIG. 6C shows a display screen in a state where the same magnification is changed to 1/2 slow during recording. As shown in 6301, the half-throw is selected. Further, as indicated by reference numeral 6302, a display indicating that the recording apparatus 100 is recording is additionally displayed. Further, as indicated by reference numeral 6303, the time code is added in accordance with the recording time.

  FIG. 6D shows a display in a state where recording is stopped (a state where recording is stopped after recording is performed for one minute from FIG. 6C). As indicated by 6401, the remaining time is reduced by 1 minute from FIG. Further, as indicated by reference numeral 6402, a message indicating that the recording apparatus 100 is not recording is displayed. Further, as indicated by reference numeral 6303, the time code is added in accordance with the recording time.

  Next, processing during reproduction will be described. When the user operates the operation unit 103 to instruct a playback mode, the playback mode is set. The control unit 102 controls each unit, and a representative image (thumbnail image) of each moving image file recorded on the recording medium selected by the user among the first recording medium 108 or the second recording medium 112. Is displayed on the display unit 109.

  The user operates the operation unit 103 to select a representative image corresponding to a desired moving image file and instruct reproduction. When there is a reproduction instruction, the control unit 102 instructs the first recording / reproducing unit 106 or the second recording / reproducing unit 111 to reproduce the designated moving image file. The first recording / reproducing unit 106 or the second recording / reproducing unit 111 reads the designated moving image file from the recording medium and stores it in the memory 105.

  The first encoding processing unit 104 reads the encoded moving image data from the memory 105, decodes it, and stores it in the memory 105 again. The display unit 109 reads out each frame of the decoded moving image data from the memory 105 and displays it. At this time, when the moving image data recorded in the section slow & fast mode is reproduced, the display unit 109 displays it at a frame rate of 30 fps. For this reason, moving image data recorded at a frame rate corresponding to a playback speed other than 1 × speed is displayed at each playback speed. The moving image data recorded in the normal recording mode is displayed at 60 fps (1 × speed).

  As described above, the present embodiment has a function of encoding a moving image and simultaneously recording it on two recording media. In addition, if there is an instruction to change the playback speed of a moving image during simultaneous recording, the frame rate of the moving image recorded on each recording medium is changed to a frame rate corresponding to the playback speed. Further, when the encoding modes of moving images recorded on the respective recording media are different, the frame rate is changed with the least common multiple of the number of frames of the encoding unit in each encoding mode as a unit.

  With such a configuration, it is possible to easily cut out a frame rate portion corresponding to each reproduction double speed from moving images simultaneously recorded on each recording medium.

  In the present embodiment, in the section slow & fast mode, the moving image frames output from the imaging unit 101 are thinned out according to the playback double speed. However, other configurations may be used. For example, if the image capturing unit 101 can appropriately change the image reading speed from the image sensor, the frame rate of the moving image data output from the image capturing unit 101 may be changed according to each reproduction speed.

  Furthermore, the image processing unit 102 may not be configured to thin out frames, but may be configured to generate moving image data having a frame rate corresponding to each reproduction speed by combining a plurality of previous and subsequent frames.

  In addition, the predetermined playback frame rate that is the frame rate at the time of playback of the recorded moving image data is set to 60 fps, but other frame rates may be used. Also, the playback double speed may be other than 1 × speed, 2 × speed, or 1/2 speed, and may be changed to four or more playback speeds.

  In addition, the encoding mode in the first encoding processing unit 104 and the second encoding processing unit 113 may be configured to include encoding modes having different numbers of frames serving as encoding units. For example, it may be configured to have a third encoding mode in which 1 GOP is composed of 12 frames. When simultaneous recording is performed in the section slow & fast mode, the first encoding processing unit 104 is set to the second encoding mode, and the second encoding processing unit 113 is set to the third encoding mode. The In this case, the frame rate changing process corresponding to the reproduction double speed is performed in units of 60 frames which is the least common multiple of 15 frames and 12 frames.

  Next, a second embodiment will be described. FIG. 7 is a diagram illustrating a recording apparatus 700 according to the second embodiment. In FIG. 7, the same components as those in FIG. 1 are denoted by the same reference numerals and detailed description thereof is omitted. In the recording apparatus 700, a third encoding processing unit 115, a third recording / reproducing unit 116, and a third recording medium 117 are added. Similar to the first encoding processing unit 104 and the second encoding processing unit 113, the third encoding processing unit 115 encodes moving image data by a predetermined encoding method. The third recording / reproducing unit 116 records moving image data and various data on the third recording medium 117. The recording storage 700 switches the recording destination to the third recording medium 117 when there is no remaining recording capacity (free space) during recording of moving images on the first recording medium 108 and the second recording medium 112. With the ability to continue recording.

  Hereinafter, the recording process in this embodiment will be described with reference to the flowchart of FIG. Note that the processing in FIG. 8 is executed by the control unit 704 controlling each unit. Since the process of S401-S413 is the same as FIG. 4, description is abbreviate | omitted. In step S <b> 801, the recording / reproducing units 108, 112, and 117 acquire the remaining recording capacity of each recording medium according to an instruction from the control unit 104. If there is a recording medium that can continue recording based on the acquired recording remaining amount (S802), and it is necessary to switch the recording medium (S803), the recording medium that has run out of remaining amount (here, the second recording) The file being recorded on the medium 112 is closed (S804). Then, the recording medium of the recording destination is switched from the second recording medium 112 to the third recording medium 117 (S805), the moving image file is opened, and recording is continued (S806). If there is no recording medium that can continue recording (S802), the process proceeds to the same control as the recording stop process.

  In FIG. 9, when recording is performed on the first recording medium 108 and the second recording medium 112, the magnification is switched from the same magnification to ½ times, and further, the second recording medium 112 performs the third recording. 12 is a timing chart when the recording medium is switched to the medium 117. As in FIG. 5, the least common multiple of the minimum recording unit is 15, and the remaining recording capacity of the second recording medium 112 has been exhausted, so the A3 frame is switched to the third recording medium 117. In the case of simple editing without straddling the recording medium, only the slow section and the fast section can be cut out.

  Next, with reference to FIG. 10, UI display when the operator operates the operation unit 103 and the recording medium is switched to the recording apparatus 700 during 1/2 recording will be described. FIG. 10A shows that recording is being performed on the first recording medium 108 indicating the card 1 and the second recording medium 112 indicating the card 2 as indicated by 1001. In FIG. 10B, as shown in 1002, the first recording medium 112 indicating the card 2 has no remaining recording capacity, so the END display is displayed, and the recording is switched to the third recording medium 117 indicating the card 3. Display that it is continuing. Further, the first recording medium 108 indicating the card 1 indicates that recording is continued because the remaining recording capacity remains.

  Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. A part of the above-described embodiments may be appropriately combined. Also, when a software program that realizes the functions of the above-described embodiments is supplied from a recording medium directly to a system or apparatus having a computer that can execute the program using wired / wireless communication, and the program is executed Are also included in the present invention.

Accordingly, the program code itself supplied and installed in the computer in order to implement the functional processing of the present invention by the computer also realizes the present invention. That is, the computer program itself for realizing the functional processing of the present invention is also included in the present invention.
In this case, the program may be in any form as long as it has a program function, such as an object code, a program executed by an interpreter, or script data supplied to the OS.

  As a recording medium for supplying the program, for example, a magnetic recording medium such as a hard disk or a magnetic tape, an optical / magneto-optical storage medium, or a nonvolatile semiconductor memory may be used. As a program supply method, a computer program that forms the present invention is stored in a server on a computer network, and a connected client computer downloads and programs the computer program.

Claims (6)

Imaging means;
Means for encoding moving image data obtained by the imaging means, the first encoding means having a plurality of encoding modes with different number of frames as a unit of encoding;
Means for encoding moving image data obtained by the imaging means, the second encoding means having the plurality of encoding modes;
First recording means for recording the moving image data encoded by the first encoding means on a first recording medium;
Second recording means for recording the moving image data encoded by the second encoding means on a second recording medium;
In response to a user instruction, any one of the plurality of encoding modes is set as an encoding mode of the first encoding unit, and any one of the plurality of encoding modes is set by the second encoding unit. The encoding mode is set, and the moving image data encoded by the first encoding unit and the second encoding unit in the set encoding mode is converted into the first recording medium and the second recording medium. Control is performed so that recording is simultaneously performed on a recording medium, and the reproduction speed when the moving image data being recorded is reproduced during the simultaneous recording of the moving image data on the first recording medium and the second recording medium. When there is an instruction to change to a predetermined reproduction speed, the frame rate of the moving image data encoded by the first encoding means and the second encoding means corresponds to the predetermined reproduction speed. Predetermined frame Change in over preparative, and a control means for controlling so as to record the moving image data of the predetermined frame rate,
The control means includes the moving image being simultaneously recorded in units of a frame number that is the least common multiple of the number of frames in the encoding mode of the moving image data recorded simultaneously on the first recording medium and the second recording medium. A recording apparatus that performs control so as to change a frame rate of data.   The control means, after starting the encoding of the video data of the frame rate when the instruction to change, the number of frames encoded after the frame that is an integral multiple of the least common multiple 2. The recording apparatus according to claim 1, wherein a frame rate of moving image data to be encoded is changed from a frame to a predetermined frame rate corresponding to the predetermined reproduction speed.   The recording apparatus according to claim 1, wherein the predetermined reproduction speed is a reproduction speed other than a normal speed.   When the control unit is instructed to change the moving image data at the frame rate corresponding to 1 × speed, the control means sets the frame rate of the moving image data to be recorded at the frame rate corresponding to the predetermined reproduction speed. The recording apparatus according to claim 1, wherein the recording apparatus is changed to:   2. The recording apparatus according to claim 1, wherein each of the first encoding unit and the second encoding unit performs encoding using intra-frame encoding and inter-frame encoding.   And a means for changing a frame rate of the moving image data encoded by the first encoding unit and the second encoding unit by thinning out the frames of the moving image data output from the imaging unit. The recording apparatus according to claim 1.

Images