JP2004173202A - Image recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To record prescribed similar parts as a moving image file by automatically extracting only the prescribed similar parts in many similar images when the many similar images of the same pattern temporally and repeatedly exist, such as images obtained by photographing a practicing person for the purpose of sport form practice. <P>SOLUTION: An image recorder is provided with a generating means (101 to 106) for generating a series of consecutive moving image signals, a recording means (110) for recording the series of moving image signals generated by the generating means on a recording medium (112), an extracting means (113) for extracting moving image signals over a prescribed period of time before and after a frame image corresponding to a given instruction signal among the series of moving image signals recorded on the recording medium, and a file creation means (113 and 110) for creating one moving image file on the basis of the moving image signals extracted by the extracting means. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a video recording device, and in particular, captures an image in which a number of similar images having the same pattern are repeatedly present in time, such as an image of a trainee for practicing a sports form, and efficiently performs the same. The present invention relates to a video recording device that enables reproduction.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a video camera in which a camera portion for capturing video and a VTR (Video Tape Recorder) for recording video data are integrated has been widely used. In addition, a VTR unit for recording video is not only a tape, but also a semiconductor memory, a hard disk drive (HDD), an optical disk (MO: Magneto Optical disk), a DVD (Digital Versatile Disk), etc. Is being commercialized.
[0003]
By the way, as a general usage method of a video camera, it is conceivable that the video camera is used for recording the growth of a child, recording at a holiday or a trip, practicing a sports form, and the like. In particular, in sports form practice, have a third person accompanying you take a picture, or in a form check without moving the shooting place, such as a golf driving range, put a video camera somewhere, Or, I often fixed my camera on a tripod and pressed the shooting start button to pan.
[0004]
A conventional technique for photographing and recording a golf swing in this way is described in, for example, Patent Document 1.
[0005]
[Patent Document 1]
JP-A-6-39070
[0006]
[Problems to be solved by the invention]
However, in the case where a video camera is used for a swing check at a golf driving range, conventionally, the video of the practice form is simply shot with the video camera, and therefore, it is not related to the swing when actually hitting the ball. In addition to the video to be performed, extra and redundant video such as swing or club exchange is also included. Furthermore, when performing a swing form check by playing back a recorded video, if the video includes extra and redundant video, operations such as cueing the video of the swing portion have to be complicated. .
[0007]
In addition, when using a video camera for pole training and competitions in ski competitions, it may not be possible to know when to start skidding, or the competitors in the upper part may not be seen due to changes in slopes. If you just shot the footage in, you will not only include the skiers skiing for the trainees and athletes in the range you actually want to shoot, but also include extra and redundant video, and the recorded slips for each trainee and the athletes. Also, when performing a form check or the like, operations such as cueing had to be complicated.
[0008]
The present invention has been made in view of such a problem, and in the case where a plurality of similar images having the same pattern in time are repeatedly present, such as an image of a trainee for sports form practice. Another object of the present invention is to provide a video recording apparatus capable of automatically extracting only a predetermined similar part from the same and recording it as a moving image file.
[0009]
[Means for Solving the Problems]
To achieve the above object, according to the first aspect of the present invention, a generating means for generating a continuous series of moving image signals, and a series of moving image signals generated by the generating means are recorded on a recording medium. Recording means, extracting means for extracting a moving image signal over a predetermined period before and after a frame image corresponding to a given instruction signal from a series of moving image signals recorded on the recording medium, and extracting by the extracting means And a file creating means for creating one moving image file based on the obtained moving image signal.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
[First Embodiment]
FIG. 1 is a block diagram showing a configuration of a video recording device according to a first embodiment of the present invention. This video recording device is a digital HDD camera (hereinafter, referred to as "HDC" (Hard Disk Camera)) using a hard disk drive (hereinafter, referred to as "HDD") as a video recording medium.
[0012]
In FIG. 1, reference numeral 101 denotes an HDC lens unit, which includes a lens with a zoom function for imaging a subject.
[0013]
Reference numeral 102 denotes an image sensor, which is configured by a CCD (Charge Coupled Device), and converts an optical image input through the lens unit 101 into an electric signal. The image sensor 102 is composed of, for example, a CCD having 680,000 total pixels and 360,000 effective pixels. The area outside the effective pixel area is used for a camera shake correction function realized by electrical image processing. You.
[0014]
An image sensor driving unit 103 drives the image sensor 102 according to a timing signal sent from a camera signal processing unit 106 described later.
[0015]
Reference numeral 104 denotes a CDS (Correlated Double Sampling) / AGC (Auto Gain Controller) unit, which samples an analog signal from the image sensor 102 and performs gain control of a signal level by a control signal from a system control unit 113 described later. .
[0016]
Reference numeral 105 denotes an A / D (Analog to Digital) converter, which converts an analog signal sent from the CDS / AGC unit 104 into a digital signal.
[0017]
Reference numeral 106 denotes a camera signal processing unit, which controls a camera imaging system in cooperation with a system control unit 113 described later, such as timing generation, AE (Auto Exposure) control, and AF (Auto Focus) control.
[0018]
Reference numeral 107 denotes a microphone, which records surrounding sounds together with a video input via an imaging system, and collects sounds for performing control using the sounds.
[0019]
Reference numeral 108 denotes a memory control unit which controls a general-purpose storage unit 109 to be described later and encodes or decodes an image signal from the camera signal processing unit 106 into MPEG2 in cooperation with a video control unit 110 and a system control unit 113 to be described later. Decoding is performed, and recording to or reading from the HDD 112 described later is performed.
[0020]
A general-purpose storage unit 109 includes a ROM for storing programs and data for implementing various control units according to the present invention, and a RAM for providing a work area for image processing and program execution.
[0021]
A video control unit 110 includes an MPEG2 encoder and decoder, performs encoding / decoding to MPEG2, and controls writing to and reading from the HDD 112. In general, an encoder performs motion prediction on an input image, performs a discrete cosine transform (DCT) on a residual signal of the input image, performs quantization, zigzag scan or alternate scan, and variable length coding (VLD; Variable Length Decoding). ) Process and encode. The decoder performs processing in the reverse order of the encoder and performs decoding to obtain a decoded image. Also, the digital video signal input from the imaging system, a text title generated by a character generator unit 111 described later, and image information recorded on an external recording medium 115 for recording external video information described later are transmitted to the system. Control such as synthesis in cooperation with the control unit 113 is also performed.
[0022]
Reference numeral 111 denotes a character generator, which reads characters of characters and symbols from a built-in read-only memory (ROM) in which pixel (bit) patterns of characters and symbols to be displayed are recorded. This reading is performed based on the date and time read from a timer 117 described later via the system control unit 113. Then, in the video control section 110, the read characters and symbol characters are combined with the video signal in accordance with the horizontal and vertical synchronization signals of the video (screen) to be combined, and are recorded by the HDD 112.
[0023]
A hard disk drive (HDD) 112 stores a video signal encoded in the MPEG2 format by the video control unit 110. On the other hand, the recorded video data is read during the reproducing operation. Here, an HDD is used as the recording medium for the video signal, but a large-capacity memory card, a write-once DVD medium, or the like may be used instead. Of course, the recording format is not limited to MPEG2, and other recording formats can be applied.
[0024]
Reference numeral 113 denotes a system control unit for executing each control process according to the present invention. Each of these control processes will be described later with reference to FIGS.
[0025]
Reference numeral 114 denotes an external recording medium connection interface, which here comprises a memory card slot.
[0026]
Reference numeral 115 denotes an external recording medium, which here comprises a memory card.
[0027]
An input operation unit 116 includes a selection button, a determination button, various mode buttons, and the like (not shown).
[0028]
Reference numeral 117 denotes a timekeeping unit which includes a real-time clock (RTC) and a backup battery, counts the date and time, and returns date and time information in response to a request from the system control unit 113.
[0029]
Reference numeral 118 denotes a D / A (Digital to Analog) converter, which converts a digital signal obtained by decoding video information recorded in the HDD 112 by the video control unit 110 into an analog signal, and supplies the analog signal to the display unit 119. send.
[0030]
A display unit 119 includes an EVF (Electrical View Finder) and an LCD display panel. The display unit 119 displays an input image from an imaging system when recording is performed on the HDD 112, and displays the input image on the HDD 112 when playback is performed. Display the recorded video. In addition, it displays input operation information by the user from the operation unit 116, arbitrary image information in the external recording medium 115, and the like.
[0031]
A gyro sensor 120 detects shake and vibration of the video camera body and transmits the information to the system control unit 113. The system control unit 113, which has received the detection information such as the angular displacement, angular velocity, and angular acceleration of the shake from the gyro sensor 120, performs an operation to cancel the shake, and controls the effective pixel area to be read from the image sensor 102 using the result. .
[0032]
In the HDC having such a configuration, for example, in the case of shooting a hammering practice at a golf driving range, recording in which a redundant portion between each golf swing in a shot video is eliminated is realized. Here, a control method of recording only a predetermined video section before and after the impact on the ball as one moving image file is realized.
[0033]
In detecting the timing of the standard impact, it is possible to detect the sound of the impact, the detection of the ball being hit in the shot video, the detection of a combination of these sounds and the video, etc. In consideration of the above situation, detection using only sound affected by the impact sound of other trainees and detection using only video affected by lighting and the surface condition of the practice ball are avoided, and detection combining sound and video I will do it. Of course, under conditions other than the driving range, for example, detection using only sound or only video may be appropriately selected.
[0034]
Also, in consideration of the convenience in reproducing a plurality of recorded moving image files by the above-described control method, during shooting, a playlist (playback) that specifies a moving image file to be reproduced at the time of reproduction and a reproduction order thereof. List) at the same time. By performing playback in accordance with the playlist, a plurality of moving image files created at different dates and times and recorded on the HDD 112 can be continuously played back in a desired order.
[0035]
Conventionally, there have been recording / reproducing systems that simply detect the start and end of shooting with a separate sensor or the like, or that record video in a ring buffer and prohibit overwriting only the required video portion. And a file generation unit for generating a moving image file different from the above.
[0036]
FIG. 2 and FIG. 3 are flowcharts showing the procedure of the control process executed by the system control unit 113.
[0037]
At the start of step S201, the power of the camera is turned on so that the image input through the lens 101 is displayed on the display unit 119. Then, as preparations before the start of shooting, first, the photographer (in this case, the person practicing golf) positions the camera and zooms in such a way that the figure of the player practicing the golf shot and the hit ball are reflected. Adjust the amount and determine the angle.
[0038]
In step S202, the rectangular area 202 is designated so as to surround the golf ball 201 at the angle determined in step S201, as shown in the screen "A" shown in the shooting scene "3-1" in FIG. The rectangular area 202 is used to specify an area in which a change in image is to be detected. In specifying the position of the rectangular area 202, a cross key included in the operation unit 116 is used. FIG. 4 will be described later in detail.
[0039]
When the user completes the designation of the rectangular area 202, the user presses the enter button included in the operation unit 116. In step S203, it is detected whether or not the enter button has been pressed. When it is detected that the determination button has been pressed, preparation for the start of photographing is completed, and the process proceeds to step S204.
[0040]
In step S204, it is detected whether or not a shooting start button included in the operation unit 116 is pressed. When the shooting start button is pressed, the process proceeds to step S205, and recording of a moving image signal on the HDD 112 as a recording medium is started. . Here, the HDD 112 that can be randomly accessed is targeted as a recording destination of the moving image signal. Of course, a semiconductor memory or a DVD medium may be used as a recording destination of the moving image signal.
[0041]
The processing content of step S205 will be described in more detail. A series of image processing is performed on the video signal input through the lens 101, and then the data obtained by the video control unit 110 encoding the data into MPEG2 is stored in the HDD 112. Is written in the arbitrarily determined moving image buffer recording area. At the same time, the captured video is displayed on the display unit 119 via the D / A 118.
[0042]
Here, FIGS. 4 to 6 will be described. FIGS. 4 to 6 show a shooting scene “3-1”, a shooting flow “3-2”, shooting data “3-3”, a format form “3-4”, and a file configuration “3-5”. It is an image figure.
[0043]
The screens “A”, “A”, “B”, “C”, and “D” of the shooting scene “3-1” represent images of a golf ball and a golf swing. The screen "A" is a screen for designating the rectangular area 202 for the golf ball 201 in step S202 as described above, and the screen "A" shows a state where the trainee has addressed the golf ball 201 before the start of the swing. The screen "B" is a screen showing a state in which the trainee takes back, the screen "C" is a screen showing the moment when the trainer impacts the ball, and the screen "D" is a screen It is a screen which shows a state where it finished by following through.
[0044]
The photographing flow “3-2” represents the flow of the operation of each golf shot of the trainee from the start of photographing in step S204. In the photographing flow “3-2”, the hatched portions “a”, “b”, and “c” represent the operation parts “Swing 1”, “Swing 2”, and “Swing 3” to be photographed. Indicates a different redundant part.
[0045]
The shooting data “3-3” indicates a series of moving image data recorded in the moving image buffer recording area on the HDD 112, and when a predetermined storage capacity is reached, a ring buffer overwritten from the first part of the area. It has a form.
[0046]
The format form “3-4” indicates a format form of a series of moving image data, and shows a continuous state of MPEG2 SH (Sequence Header) and GOP (Group of Pictures). At the beginning of the video data (MPEG streaming data), a sequence header (sequence header code) for specifying various screen formats such as a horizontal / vertical size, an aspect ratio, and a field / frame rate of the screen is added. Are recorded together with a GOP having a group configuration in which the pictures are arranged. A GOP includes at least one I-picture (Intra-coded picture), and in addition, may include a P-picture (Predictive-coded picture), a B-picture (Bidirectionally predictive-coded picture), and usually includes 5 to 5. It has a relatively short GOP structure of about 30 pictures.
[0047]
An I picture is an intra-frame coded image that is coded only with its own picture information without using other picture information, and a P picture is a past I picture or a P picture described later as a reference picture. Is a forward-predicted coded image that has been forward-motion-predicted and coded on the time axis, and the B-picture includes forward and backward I- or P-pictures as reference pictures in the forward and backward directions on the time axis. It is a bidirectionally coded image that has been motion prediction coded.
[0048]
Since an I picture can be decoded independently of other pictures, it can be used as an access point during random access. Also, decoding of P pictures requires information of past I pictures, and decoding of B pictures requires information of past and future I or P pictures. In the case of fast-moving video, in order to sharpen a moving image, a control is often performed in which a B-picture is not inserted at the expense of a certain compression rate.
[0049]
The configuration of these three picture types in MPEG2 is configured according to the specifications of the encoder, that is, according to the compression ratio, the random access function, and the priority of the delay time.
[0050]
In addition, since it is assumed that only specific data is extracted as a file from a series of moving image data, a closed GOP that can be decoded regardless of previous and subsequent GOPs is used at the time of encoding.
[0051]
Although not specifically shown, sound (audio) is appropriately positioned between a plurality of video data in accordance with the MPEG2 format.
[0052]
The file configuration “3-5” indicates specific data recorded in another area on the HDD 112 from a series of moving image data when transfer (copy) is started in step S212 described later.
[0053]
Returning to FIG. 2, in step S217, it is detected whether or not the user has pressed the shooting end button of the operation unit 116. If the button has been pressed, the process proceeds to step S218. If not, the process proceeds to step S206. move on.
[0054]
In step S206, a shot sound (impact sound) of the ball in golf practice is detected. The detection method may be any method. For example, after an input signal from the microphone 107 is converted into a digital signal by an AD converter built in the camera signal processing unit 106, the intensity of the sound exceeds a certain threshold. The above detection is performed based on a criterion such as that the time length exceeding the threshold value is the same as the appropriate length as the shot sound of the ball.
[0055]
During this time, the captured video (moving image signal) continues to be recorded in the moving image buffer recording area of the HDD 112.
[0056]
In step S207, in response to the detection of the shot sound of the golf ball, a video change in the rectangular area 202 specified in step S202 is detected. There are various methods for recognizing a change in image for detecting that the golf ball 201 has been hit. Here, it is assumed that the change in luminance and color difference of the image data in the specified rectangular area 202 is monitored. The data of the captured image input to the camera signal processing unit 106 differs depending on whether the image sensor (CCD) 102 uses a primary color filter or a complementary color filter. In the signal processing unit 106, luminance, color difference components of Y, Cr, and Cb, not RGB, are generally handled as processing targets. Here, by utilizing the fact that the golf ball is white, for example, the average luminance (Y) in the rectangular area 202 specified in step S202 is smaller than a certain threshold, or the threshold is an average color difference (Cr, Cb) component. (When ideal white 100% is considered digitally with 256 gradations, each of Cr and Cb is 128), it is recognized that the golf ball has been hit. Shall be.
[0057]
Although various exact detection methods are conceivable, the detection method does not affect the essence of the present invention.
[0058]
In step S208, in response to the detection that the golf ball 201 has been hit, in order to create a moving image file, of the series of moving image signals that have been started to be recorded in step S205 and are continuously recorded in the HDD 112, Acquire and hold the time code of the frame (image) to be recorded. In obtaining the time code, the GOP header (group of pictures header) at the head of the GOP is detected, and the time code (time code) of the video data included in the GOP header is referred to.
[0059]
In step S209, a trigger flag to be used as a search flag at the time of reproduction is recorded in the HDD 112 together with header information and the like in correspondence with a frame (image) to be recorded at present in a series of moving image signals recorded continuously. Record.
[0060]
In step S210, based on the time code (time information indicating the trigger position) held in step S208, of the series of moving image signals that have been started to be recorded in step S205 and are continuously recorded in the HDD 112, the first predetermined Search (random access) for frames (images) that have gone back in time. In this example, since the golf swing practice is targeted, the first predetermined time at least corresponds to a period from the timing of starting the swing to the timing of hitting the golf ball, and is set to, for example, 5 seconds. . Note that a second predetermined time (for example, 3 seconds) corresponding to at least a period from the trigger position (the timing at which the golf ball is hit) to the end timing of the swing is set. The first and second predetermined times may be configured to be arbitrarily set by the user. The sum of the first and second predetermined times is defined as a third predetermined time.
[0061]
In step S211, the HDD 112 writes the moving image data for the third predetermined time starting from the frame (image) at the trigger position, which has been searched in step S210, the frame (image) preceding by the first predetermined time. FAT (File Allocation Table) information that manages files in the HDD 112 is managed so as not to overwrite a series of moving image data therein.
[0062]
In step S212, the moving image data for the third predetermined time is set as one file in an area different from the moving image buffer recording area of the HDD 112 which records the series of moving image signals started to be recorded in step S205. , Transfer (copy) starts. As a result, a moving image file is created.
[0063]
In step S213, it is determined whether or not all the frames (images) for the third predetermined time have been transferred. If the transfer has been completed, the process proceeds to step S214. It is assumed that the recording of a series of moving image data started in step S205 does not overtake the transfer (copy) for creating a moving image file started in step S212 on the video.
[0064]
In step S214, the transfer (copy) of the moving image started in step S212 ends, and the creation of one moving image file ends. In this case, a moving image for a total of 8 seconds, that is, a first predetermined time (5 seconds) before the frame at the trigger position and a second predetermined time (3 seconds) after, is created as one file.
[0065]
In step S215, the FAT information that prevents the series of moving image data being written to the HDD 112 from being overwritten on the copy source of the moving image file to be created in step S211 is changed (opened) so that it can be overwritten. .
[0066]
In step S216, the file name of the file created as the moving image file is registered in a separate area of the HDD 112 as a playlist file for reproduction. The file name of the playlist is set to an arbitrary file name, and the date and time of photographing may be added to the file name.
[0067]
In step S217 described above, it is detected whether or not the user has pressed the shooting end button of the operation unit 116. If the button has been pressed, the process advances to step S218 to end recording a series of moving image data in the HDD 112. (S219). Until the shooting end button is pressed, a series of controls in steps S206 to S216 are repeated.
[0068]
In step S218, the recording of the moving image data (MPEG2 streaming data) on the HDD 112 started in step S205 is ended in response to the user's instruction to end the shooting. In step S219, the present process is terminated, and the process is restarted in step S201 as necessary.
[0069]
Incidentally, step S2 * indicated by a dotted line in FIG. 3 is assumed as a step to be executed instead of steps S212 to S215. That is, as in steps S212 to S215, when the moving image data of the frame before and after the frame at the trigger position is created as one moving image file, a moving image buffer that records a series of moving image data In step S2 *, the file is created by changing the FAT information of the HDD 112 in the moving image buffer recording area instead of transferring (copying) the file from the recording area to another area. In the method according to step S2 *, it is possible to create a file without moving data.
[0070]
As described above, in the related art, simply shooting a video with a video camera for a swing check at a golf driving range or the like simply includes extra video in addition to the video related to the actual swing, which is wasteful. You will be recording. Further, when performing a form check of the recorded swing, operations such as cueing have to be complicated. On the other hand, according to the present invention, only the part necessary for the swing form check is automatically extracted and a file is created, so that the above-described inconvenience can be solved.
[0071]
[Second embodiment]
Next, a second embodiment will be described.
[0072]
The configuration of the second embodiment is basically the same as the configuration of the first embodiment. Therefore, in the description of the second embodiment, the configuration of the first embodiment is diverted, and the description is omitted.
[0073]
In the second embodiment, the procedure of the control process executed by the system control unit 113 is different from the procedure of the control process in the first embodiment. That is, the method of determining the trigger position as a reference for creating a moving image file and the method of determining the video range before and after the trigger position are different from the first embodiment.
[0074]
In the first embodiment, the trigger position is automatically detected based on sound (voice) and video. In addition, a moving image file is created by extracting moving image signals before and after a frame (image) corresponding to the trigger position over first and second predetermined times set in advance.
[0075]
On the other hand, in the second embodiment, the photographer appropriately designates the trigger position and the periods corresponding to the first and second predetermined times according to the photographing target.
[0076]
FIG. 7 and FIG. 8 are flowcharts illustrating a procedure of control processing executed by the system control unit 113 according to the second embodiment.
[0077]
At the start of step S401, the power of the HDC is turned on, and the image input through the lens 101 is displayed on the display unit 119. In the second embodiment, it is assumed that another person who is not a person practicing skiing or competing is taking a picture.
[0078]
In step S402, it is detected that the shooting start button included in the operation unit 116 has been pressed, and after the detection, the process proceeds to step S403, and recording in the HDD 112 as a recording medium is started. Here, a randomly accessible HDD is targeted as a moving image recording destination, but a semiconductor memory, a DVD medium, or the like may be used as a moving image recording medium.
[0079]
In step S403, a series of video processing is performed on the video signal input from the image sensor 102, and data obtained by encoding the video signal into MPEG2 by the video control unit 110 is written to a predetermined moving image buffer recording area of the HDD 112. . At the same time, the captured video is displayed on the display unit 119 such as an LCD via the D / A 118.
[0080]
Here, FIGS. 9 to 11 will be described. 9 to 11 show a shooting scene “5-1”, a shooting flow “5-2”, shooting data “5-3”, a format form “5-4”, and a file configuration “5-5”. It is an image figure.
[0081]
The screens “E”, “F”, and “G” of the photographing scene “5-1” show an image in which a player (slider) slides down from above a slope in a ski pole competition, and “E” → The player is sliding from "F" to "G" from above and is approaching the photographer.
[0082]
The photographing flow “5-2” represents the flow of each downhill motion of the player after starting the photographing in step S402. "E", "f", and "g", which are indicated by diagonal lines in the flow of shooting "5-2", are movement parts "player 1", "player 2", and "player 3" to be shot. Indicates a different redundant part.
[0083]
The photographing data “5-3” indicates a series of moving image data recorded in the moving image buffer recording area on the HDD 112, and when a predetermined storage capacity is reached, a ring buffer overwritten from the first part of the area. It has a form.
[0084]
The format form “5-4” indicates a format form of a series of moving image data, and shows a continuous state of an MPEG2 SH (Sequence Header) and a GOP (Group of Pictures). The details of the format are the same as those described in the first embodiment with reference to FIGS.
[0085]
The file configuration “5-5” indicates specific data recorded in another area on the HDD 112 from a series of moving image data when transfer (copy) is started in step S415 described later.
[0086]
Returning to FIG. 7, in step S423, it is detected whether or not the shooting end button of the operation unit 116 has been pressed by the user. If the button has been pressed, the process proceeds to step S424. If not, the process proceeds to step S404. move on.
[0087]
In step S404, it is determined whether it is the first moving image file creation. If it is the first moving image file creation, the process proceeds to step S405. If it is the second or subsequent movie file creation, the process proceeds to step S420.
[0088]
When the photographer presses a trigger button included in the operation unit 116, the first position of a series of videos to be stored in the moving image file (corresponding to the screen “E” of the photographed scene “5-1” in FIG. 9) Is specified. In step S405, it is determined whether an initial position designation signal generated by pressing the trigger button has been input. If the first position designation signal has been input, the process proceeds to step S406, and if not, the process returns to step S423.
[0089]
In step S406, the time code (time code holding value 1) of the frame (image) to be recorded when the first position designation signal is input from the series of moving image signals whose recording has been started in step S403 is determined. Get and retain. The time code is obtained by detecting the GOP header (group of pictures header) at the head of the GOP and referring to the time code (time code) of the video data included in the GOP header.
[0090]
The photographer inputs an instruction signal (trigger) at a desired timing using a trigger button included in the operation unit 116. In step S407, it is determined whether or not the instruction signal has been input. The reference timing is, for example, a timing (trigger position) corresponding to the image shown on the screen “F” of the shooting scene “5-1” in FIG. This is the timing at which a competitor passes by an arbitrarily determined pole in ski pole competitions, etc.By pressing the trigger button at this timing, the image passing by that pole becomes the reference, It is possible to easily watch the slip before and after this reference at the time of reproduction.
[0091]
In step S408, in response to the input of the instruction signal, the time code of the frame (image) to be recorded when the instruction signal is input is included in the series of moving image signals that have been started to be recorded in step S403. (Time code holding value 2) is acquired and held.
[0092]
In step S409, for the frame (image) to be recorded when the instruction signal is input, a trigger flag to be used as a search flag at the time of reproduction is recorded in the HDD 112 together with header information and the like.
[0093]
When the photographer presses a trigger button included in the operation unit 116, the last position of a series of videos to be stored in the moving image file (corresponding to the screen "G" of the photographed scene "5-1" in FIG. 9) Is specified. In step S410, it is determined whether or not a last position designation signal generated by pressing the trigger button has been input. If the last position designation signal is input, the process proceeds to step S411.
[0094]
In step S411, the time code (time code holding value 3) of the frame (image) to be recorded when the last position designation signal is input from the series of moving image signals whose recording has been started in step S403. Get and retain.
[0095]
In step S412, a first period and a second period, which are periods (time) before and after the instruction signal (trigger), are calculated based on the following formula.
[0096]
1st period = time code hold value 2−time code hold value 1
Second period = time code hold value 3—time code hold value 2
In step S413, from the series of moving image signals recorded in step S403, the time code value calculated in step S412 based on the time code held value 2 held in step S408 or the time code held value held in step S421 described later. Search (random access) for a frame (image) position that has been traced back by one period.
[0097]
In step S414, a series of moving image data being written to the HDD 112 is not overwritten on the moving image data corresponding to the sum of the first and second periods from the frame (image) searched in step S413. , And FAT (File Allocation Table) information that manages files in the HDD 112.
[0098]
In step S415, a series of moving image signals is recorded using the frame (image) searched in step S413 as a head, and moving image data for a time obtained by adding the first and second periods as one moving image file. The data is transferred and stored in an area different from the moving image buffer recording area of the HDD 112.
[0099]
In step S416, it is determined whether moving image data corresponding to the sum of the first and second periods has been stored in an area of the HDD 112 that is different from the moving image buffer recording area. If stored, the process proceeds to step S417. It is assumed that the recording of a series of moving image data started in step S403 does not overtake the transfer (copy) for creating a moving image file started in step S415 on the video.
[0100]
In step S417, the transfer (copy) of the moving image started in step S415 ends, and the creation of one moving image file ends. As a result, the moving image data for the total time of the "first period" before the frame at the trigger position where the instruction signal is input and the "second period" after the frame as one file. You have created it.
[0101]
In step S418, the FAT information that prevents the series of moving image data being written to the HDD 112 from being overwritten on the copy source of the moving image file to be created in step S414 is changed (opened) so that it can be overwritten. .
[0102]
In step S419, the file name of the file created as the moving image file is registered in a separate area of the HDD 112 as a playlist file for reproduction. Although the file name of the playlist is set arbitrarily, the date and time of photographing may be added after sorting and organizing.
[0103]
If it is determined in step S404 that the moving image file is to be created for the second time or later, the process proceeds to step S420, and similarly to the processing in step S407, an instruction signal (trigger) input at a timing desired to be a reference. ) Is determined.
[0104]
In step S421, in response to the input of the instruction signal, the time code of the frame (image) to be recorded when the instruction signal is input is included in the series of moving image signals that have been started recording in step S403. (Time code hold value) is acquired and held.
[0105]
In step S422, for the frame (image) to be recorded when the instruction signal is input, a trigger flag to be used as a search flag during reproduction is recorded in the HDD 112 together with header information and the like.
[0106]
Then, the process proceeds to step S413 and subsequent steps.
[0107]
In the case of the ski competition given here as an example, since the skiing speed of the skier is not constant, it is necessary to always create the second and subsequent moving image files in step S413 and thereafter based on the first and second periods. On the reproduction screen, the player is not always at a position such as the screen “E” or the screen “G” of the shooting scene “5-1” in FIG. However, when the photographer presses the trigger button and inputs an instruction signal when the player slides to a position like the screen “F” of the photographing scene “5-1” in FIG. 9, the photographer focuses on the reference position. The video of the main part is surely secured.
[0108]
If it is determined in step S423 that the user has pressed the shooting end button of the operation unit 116, the process proceeds to step S424, and the recording of the moving image data (MPEG2 streaming data) on the HDD 112 started in step S403 ends. I do.
[0109]
This processing ends in step S425, and restarts from step S401 as necessary.
[0110]
Meanwhile, step S4 * indicated by a dotted line in FIG. 8 is assumed as a step to be executed instead of steps S415 to S418. That is, as in steps S415 to S418, when the moving image data of the frame before and after the frame at the trigger position is created as one moving image file, a moving image buffer that records a series of moving image data In step S4 *, the file is created by changing the FAT information of the HDD 112 in the moving image buffer recording area, instead of transferring (copying) the file from the recording area to another area. In the method according to step S4 *, it is possible to create a file without moving data.
[0111]
As described above, in the second embodiment, the photographer can arbitrarily input an instruction signal indicating the trigger position, and the video before and after the instruction signal can be combined into one moving image file for how long. The photographer can determine whether to store the image.
[0112]
This makes it possible not only to create a video file in which motion is repeated with a certain rhythm to some extent, such as when practicing a golf shot, etc. It is possible to cope with a case where it is difficult to predict the preceding and succeeding video periods from the reference trigger position depending on the slope to be set and the way of pole setting. Also, instead of simply designating the preceding and following video periods by inputting numbers, for example, the video of the next and subsequent sliders is easily generated as a moving image file based on the descent of the first slider. be able to. As a result, when a ski pole spin event is shot multiple times, redundant portions of the video are eliminated, and only predetermined sections before and after the timing based on the timing intended by the photographer are recorded. Becomes possible.
[0113]
[Other embodiments]
It is to be noted that an object of the present invention is to supply a storage medium storing a program code of software for realizing the function of each embodiment to a system or an apparatus, and to store the storage medium in a computer (or a CPU or an MPU) of the system or the apparatus It is also achieved by reading and executing the program code stored in the medium.
[0114]
In this case, the program code itself read from the storage medium implements the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention.
[0115]
Examples of a storage medium for supplying the program code include a floppy (registered trademark) disk, hard disk, magneto-optical disk, CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, and DVD. -RW, DVD-R, magnetic tape, nonvolatile memory card, ROM, and the like can be used.
[0116]
When the computer executes the readout program code, not only the functions of the above embodiments are realized, but also an OS (Operating System) or the like running on the computer based on the instructions of the program code. Performs some or all of the actual processing, and the processing realizes the functions of the above-described embodiments.
[0117]
Further, after the program code read from the storage medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion is performed based on the instruction of the program code. This also includes the case where the CPU or the like provided in the board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.
[0118]
As described above, various embodiments of the present invention have been shown and described. Examples of the embodiments of the present invention are listed below.
[0119]
[Embodiment 1] Generation means for generating a continuous series of moving image signals,
Recording means for recording a series of moving image signals generated by the generating means on a recording medium,
From a series of moving image signals recorded on the recording medium, extracting means for extracting a moving image signal over a predetermined period before and after a frame image corresponding to a given instruction signal,
File creating means for creating one moving image file based on the moving image signal extracted by the extracting means;
A video recording device comprising:
[0120]
[Embodiment 2] The extraction means includes a moving image signal for a first predetermined period immediately before a frame image corresponding to the instruction signal and a second predetermined period immediately after a frame image corresponding to the instruction signal. 3. The video recording apparatus according to claim 1, wherein a moving image signal extending over the video signal is extracted from the series of moving image signals.
[0121]
[Embodiment 3] The video recording apparatus according to Embodiment 2, wherein the first predetermined period and the second predetermined period are arbitrarily set.
[0122]
[Embodiment 4] The video recording apparatus according to Embodiment 2, wherein the start point of the first predetermined period, the end point of the second predetermined period, and the instruction signal are arbitrarily set from outside.
[0123]
[Embodiment 5] The video recording apparatus according to Embodiment 1, further comprising an instruction signal generating means for generating the instruction signal based on the series of moving image signals.
[0124]
[Sixth Embodiment] The fifth embodiment according to the fifth embodiment, characterized in that the instruction signal generating means generates the instruction signal based on an image signal of a predetermined area in each frame image constituting the series of moving image signals. Video recording device.
[0125]
[Seventh Embodiment] The video recording apparatus according to the first embodiment, wherein the instruction signal generating means generates the instruction signal based on an audio signal generated together with the series of moving image signals.
[0126]
[Eighth Embodiment] The video recording apparatus according to the seventh embodiment, wherein the instruction signal generating means generates the instruction signal based on the audio signal and the series of moving image signals.
[0127]
[Embodiment 9] An embodiment 1 further comprising an adding means for adding information indicating the time when the instruction signal is generated or the fact of the occurrence to frame image data corresponding to the instruction signal. The video recording device according to the above.
[0128]
[Embodiment 10] The playback device according to Embodiment 1, further comprising a playlist generation unit that generates a playlist specifying a playback method when a plurality of moving image files created by the file creation unit are played back. Video recording device.
[0129]
[Embodiment 11] The video recording apparatus according to embodiment 10, wherein the playlist generation unit generates the playlist every time a moving image file is created by the file creation unit.
[0130]
[Embodiment 12] The recording medium is a randomly accessible recording medium, and the recording means cyclically records the series of moving image signals in a predetermined area of the recording medium. The video recording device according to the first embodiment.
[0131]
[Thirteenth Embodiment] The file creating unit may create a single moving image file by recording the moving image signal extracted by the extracting unit in an area other than the predetermined area of the recording medium. 13. The video recording device according to claim 12, characterized by:
[0132]
[Embodiment 14] A generation step of generating a continuous series of moving image signals,
A recording step of recording a series of moving image signals generated by the generation step on a recording medium,
An extraction step of extracting, from a series of moving image signals recorded on the recording medium, a moving image signal over a predetermined period before and after a frame image corresponding to a given instruction signal,
A file creating step of creating one moving image file based on the moving image signal extracted by the extracting step;
A video recording method comprising:
[0133]
[Embodiment 15] A generation step of generating a continuous series of moving image signals,
A recording step of recording a series of moving image signals generated by the generation step on a recording medium,
An extraction step of extracting, from a series of moving image signals recorded on the recording medium, a moving image signal over a predetermined period before and after a frame image corresponding to a given instruction signal,
A file creating step of creating one moving image file based on the moving image signal extracted by the extracting step;
A computer-executable program, comprising:
[0134]
[Embodiment 16] A generation step of generating a continuous series of moving image signals,
A recording step of recording a series of moving image signals generated by the generation step on a recording medium,
An extraction step of extracting, from a series of moving image signals recorded on the recording medium, a moving image signal over a predetermined period before and after a frame image corresponding to a given instruction signal,
A file creating step of creating one moving image file based on the moving image signal extracted by the extracting step;
A computer-readable storage medium storing a program as a program.
[0135]
【The invention's effect】
As described above in detail, according to the present invention, for example, when shooting a hitting practice at a golf driving range, recording in which a redundant portion between golf swings in a shot video is eliminated can be realized. Here, a control method for repeating recording of only the video section before and after the impact of the golf swing on the ball as one moving image file is realized.
[0136]
Also, not only when making a video file with a certain rhythm to a certain extent as a moving image file, such as when practicing a golf shot, but also when performing a pole set in a ski competition or shooting at a tournament, Flexible handling in cases where it is difficult to predict the video period before and after the reference trigger position in advance, or in situations where the timing of the reference instruction signal cannot be made from sound or video Becomes possible.
[0137]
Further, for convenience in playing back a plurality of moving image files generated by the present invention, a play list (play list) for determining a playing moving image file to be played back during shooting is simultaneously created, and a recording medium is created. It is also possible to easily reproduce a plurality of moving image files created at different times and places in the video.
[0138]
Further, according to each of the above embodiments, in the video recording device according to the second embodiment, a moving image file including video portions before and after the instruction signal is generated by using the instruction signal as a trigger. By setting the second predetermined period, it is possible to generate a plurality of moving image files in which redundant portions of the captured video are practically excluded.
[0139]
Subsequently, in the video recording apparatus according to the fifth embodiment, for example, in photographing a golf form, the instruction signal can be generated by visually detecting a swing, a jump of a ball, and the like.
[0140]
In order to easily detect a change in the image, the image recording apparatus according to the sixth embodiment specifies, for example, a rectangular area surrounding the ball in the case of shooting a golf swing practice, and specifies the rectangular area. Detects the amount of change in luminance and chroma within. Thereby, the configuration of the detection circuit and the detection method can be simplified. Of course, the area surrounding the ball is not limited to a rectangle, but may be a circle or the like.
[0141]
The video recording apparatus according to the seventh embodiment uses sound to generate an instruction signal instead of the moving image signal according to the fifth embodiment. In golf swing practice, a shot sound of a ball or the like is detected.
[0142]
Since the video recording apparatus according to the eighth embodiment generates the instruction signal using the audio signal and the moving image signal, the timing detection accuracy of the instruction signal can be improved.
[0143]
The video recording apparatus according to the ninth embodiment can easily search for a frame image corresponding to an instruction signal by searching for the information at the time of reproduction or the like.
[0144]
The video recording apparatus according to the tenth embodiment can generate a reproduction list that facilitates reproduction of a desired series of videos from a plurality of moving image files during reproduction.
[0145]
In the video recording device according to the eleventh embodiment, since a playlist for each shooting unit is generated, by selecting a playlist according to the shooting date and time, playback, copying, editing, and the like of a moving image file group included in the list are performed. Can be easily performed.
[0146]
The video recording apparatus according to the twelfth embodiment enables a practical system configuration by having immediate access to recording data that is difficult to realize with a tape recording medium such as a memory, an HDD, and a DVD.
[0147]
The video recording apparatus according to the thirteenth embodiment generates a moving image file in a region other than a predetermined region on a recording medium where a series of moving image signals are recorded when generating one moving image file. I do. This makes it possible to protect the moving image file from being overwritten by different data.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a video recording apparatus according to a first embodiment of the present invention.
FIG. 2 is a flowchart (1/2) illustrating a procedure of a control process executed in a system control unit.
FIG. 3 is a flowchart (2/2) showing a procedure of a control process executed in the system control unit.
FIG. 4 is an image diagram showing a shooting scene, a shooting flow, shooting data, a format, and a file configuration.
FIG. 5 is an image diagram showing a shooting scene, a shooting flow, shooting data, a format, and a file configuration.
FIG. 6 is an image diagram showing a shooting scene, a shooting flow, shooting data, a format, and a file configuration.
FIG. 7 is a flowchart (1/2) illustrating a procedure of a control process executed by a system control unit according to the second embodiment.
FIG. 8 is a flowchart (2/2) illustrating a procedure of a control process executed by the system control unit according to the second embodiment.
FIG. 9 is an image diagram showing a shooting scene, a shooting flow, shooting data, a format form, and a file configuration in the second embodiment.
FIG. 10 is an image diagram showing a shooting scene, a shooting flow, shooting data, a format, and a file configuration in the second embodiment.
FIG. 11 is an image diagram showing a shooting scene, a shooting flow, shooting data, a format form, and a file configuration in the second embodiment.
[Explanation of symbols]
101 Lens unit
102 Image sensor (CCD)
103 Image sensor driver
104 CDS / AGC part
105 A / D converter
106 camera signal processing unit
107 microphone
108 Memory control unit
109 General-purpose storage unit
110 Video control unit
111 Character Generator
112 HDD
113 System control unit
114 External recording medium connection interface
115 External storage medium (memory card)
116 Operation unit
117 Clock section
118 D / A converter
119 Display
120 gyro sensor

Claims (1)

Generating means for generating a continuous series of moving image signals,
Recording means for recording a series of moving image signals generated by the generating means on a recording medium,
From a series of moving image signals recorded on the recording medium, extracting means for extracting a moving image signal over a predetermined period before and after a frame image corresponding to a given instruction signal,
A video recording apparatus comprising: a file creating unit that creates one moving image file based on the moving image signal extracted by the extracting unit.

Images