JP4181846B2 - Recording / reproducing apparatus and reproducing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a recording / reproducing apparatus.And its regeneration methodIn particular, at least a battery-driven recording / reproducing apparatus for recording a media data file including at least one of a moving image and audio on a recording medium that can be randomly accessed, and reading out and reproducing from the recording mediumAnd its regeneration methodAbout.
[0002]
The recording / reproducing apparatus is, for example, a digital video camera using a randomly accessible medium such as a magneto-optical disk, a hard disk, or a memory card as a recording medium.
[0003]
[Prior art]
Conventionally, products using video tapes as recording media have been common in general-use video decks and video cameras, but recently, products using disk media such as hard disks and DVD-RAMs as digital technology advances. Is coming out. These products add value by incorporating functions that take advantage of random access, which was impossible with tape. For example, by selecting a moving image or still image recorded on a medium (recording medium) from a representative image (thumbnail image), the selected moving image or still image can be immediately played back, and rewinding or fast-forwarding can be performed. Reproduction is possible without waiting time.
[0004]
Among the functions installed in such products, there is a so-called playlist function. With this playlist function, a clip to be reproduced from media clips such as moving images, still images, and audio, and the reproduction order thereof are determined in advance, and stored as a playlist on a disk medium. At the time of reproduction, a series of reproduction can be executed as intended by the user (playlist creator) simply by selecting one of the saved playlists. With such a playlist function, similar reproduction can be easily performed any number of times. Further, troublesome editing work is not required when such a series of reproduced contents is dubbed to a tape.
[0005]
For example, techniques described in the following documents are known as techniques for changing a playback procedure using a playlist when performing manual recording and playback using a disk medium.
[0006]
[Patent Document 1]
JP 2002-175680 A
[0007]
[Problems to be solved by the invention]
This kind of playlist function was originally used in personal computers and stationary disc video decks, but recently, with the increasing functionality of small disc video cameras and digital cameras that operate on batteries, the products that are being installed It is increasing.
[0008]
However, such devices as video cameras and digital cameras differ from stationary devices in that most products are driven by both AC power (home outlets, etc.) and battery. There is a problem specific to the playlist function due to power shortage.
[0009]
In other words, if you try to play a series of content with the playlist function, if the playback stops due to insufficient battery power, the playback content will become difficult to understand intuitively, If you want to increase your emotions by looking at the end, you may have trouble, and the playlist creator's aim may be off.
[0010]
  The present invention,In view of such a problem, when a battery-powered playback is performed, a specific method for determining whether or not all playback content can be played back to the end will be devised and commercialized. Recording and playback deviceAnd its regeneration methodThe purpose is to provide.
[0011]
[Means for Solving the Problems]
  In order to achieve the above object, a recording / reproducing apparatus according to claim 1 comprises:A battery-driven recording / reproducing apparatus, a plurality of media data files each including at least one of a moving image, a still image, and audio, and the specified media data by designating each media data file Recording / reproducing means for recording / reproducing a plurality of playlists for specifying a reproduction procedure of a file with respect to a recording medium; and display means for displaying a list screen showing information of the plurality of playlists recorded on the recording medium; Selecting means for selecting one of a plurality of playlists shown on the list screen, and playback control means for playing back the media data file by the recording / playback means according to a playback procedure according to the selected playlist. And the media according to a playback procedure specified by the plurality of playlists recorded on the recording medium. Reproduction time detection means for detecting the reproduction time required for reproducing the data file for each of the plurality of playlists, calculation means for calculating drivable time based on the remaining power of the battery, and the reproduction time detection Whether the media data file designated by each of the plurality of playlists shown on the list screen can be reproduced to the end based on the reproduction time detected by the means and the drivable time calculated by the calculation means Based on the determination result of the determination means and the determination result of the determination means, among the plurality of playlists shown on the list screen, the warning information of the playlist that cannot play the specified media data file to the end Control means for controlling the display means to display on a screen. To.
In order to achieve the above object, a playback method according to claim 4 is characterized in that a plurality of media data files each including at least one of a moving image, a still image, and sound, Recording / reproducing means for recording / reproducing a plurality of playlists for specifying a reproduction procedure of the designated media data file on a recording medium, and a list screen showing information on the plurality of playlists recorded on the recording medium Display means for displaying; selection means for selecting one of a plurality of playlists shown on the list screen; and the recording / playback means for recording the media data file in a playback procedure according to the selected playlist. A playback control method for a battery-powered recording / playback apparatus comprising playback control means for playback, wherein the recording medium is A reproduction time detecting step for detecting a reproduction time required for reproducing the media data file according to a reproduction procedure specified by the plurality of recorded playlists for each of the plurality of playlists, and a remaining power level of the battery. Based on the calculation step for calculating the drivable time based on the reproduction time detected in the reproduction time detection step and the drivable time calculated in the calculation step, A determination step for determining whether or not the media data file designated by each of the playlists can be reproduced to the end, and a plurality of the playlists displayed on the list screen based on a determination result in the determination step , Playlist that cannot play the specified media data file to the end Warning information; and a control step of controlling the display means to display the list screen.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
[First Embodiment]
2A and 2B are external views showing the configuration of the recording / reproducing apparatus according to the first embodiment of the present invention. FIG. 2A is a perspective view of the recording / reproducing apparatus, and FIG. It is the figure seen from. The recording / reproducing apparatus in the present embodiment is a video camera.
[0014]
In FIG. 2A, reference numeral 201 denotes a video camera body. The video camera body 201 contains a recording medium such as a hard disk or a magneto-optical disk. For example, MPEG data obtained by subjecting a moving image to compression processing such as MPEG (Moving Picture Experts Group) system, JPEG data obtained by subjecting an image to compression processing such as JPEG (Joint Photographic Coding Experts Group) is recorded and reproduced.
[0015]
Reference numeral 202 denotes a lens unit. Reference numeral 203 denotes a microphone, which is provided for recording sound during shooting. Reference numeral 204 denotes an electronic viewfinder (EVF), which is provided for the user to aim at or confirm a subject when photographing with a camera. The EVF 204 can be turned off by the control in the main body 201. Reference numeral 205 denotes a trigger switch. The trigger switch 205 includes a push button, and is a switch operated by a menuer that transmits an intention to start or end shooting to the main body 201. The main body 201 basically records shooting data obtained from the start to the end of shooting as a single file. At the same time, information necessary for reproduction is also recorded. This information is, for example, instructing special reproduction such as fast-forwarding or various display methods.
[0016]
Reference numeral 206 denotes a mode dial, which is composed of a rotary switch. As shown in FIG. 2B, the mode dial 206 has a display of “playback” for setting the playback mode, “camera” for setting the camera mode, and “OFF” for turning the operation off. Has been made. Reference numeral 212 denotes a mark bar provided on the main body 201. The mode dial 206 is rotated by the user's operation, and the main body 201 is activated in the mode at the position of the bar 212. In the playback mode, the camera unit is turned off and the image recorded on the recording medium is played back, and functions such as content editing and deletion are also executed when this mode is set. On the other hand, the camera mode is a mode whose main purpose is shooting.
[0017]
Reference numeral 207 denotes an operation switch group, which includes various keys for the user to operate the main body 201, and in particular, keys for a reproduction operation, a menu operation, and the like are arranged. A liquid crystal panel 208 is attached to the side surface of the main body 201 so as to be freely opened and closed. Like the EVF 204, the liquid crystal panel 208 is used for confirming a subject image when photographing with a camera, and displays a reproduced image during reproduction. Note that the liquid crystal panel 208 can be turned off by the control from the main body 201, similarly to the EVF 204. Further, the liquid crystal panel 208 is further rotatable around the hinge while being opened from the main body 201 by the hinge. Reference numeral 211 denotes a panel open / close detection switch for electrically detecting an open state and a closed state of the liquid crystal panel 208. The panel open / close detection switch 211 is configured to be pressed by the frame of the liquid crystal panel 208 when the liquid crystal panel 208 is closed, and has two states: a pressed state of the panel open / close detection switch 211 and a released state. The control system can be recognized. Reference numeral 209 denotes a speaker which outputs sound during reproduction. A battery 210 is detachable from the main body 201.
[0018]
FIG. 1 is a block diagram showing a configuration of a control system of a video camera having such an appearance.
[0019]
In the figure, reference numeral 107 denotes a microcomputer that controls the entire system. Reference numeral 101 denotes a lens unit (corresponding to the lens unit 202 in FIG. 2), for example, which corrects the imaging position moved by the movement of a fixed lens group for focusing, a variable power lens group, a stop, and a variable power lens group. The correction lens group has both a function and a function of adjusting the focus. An object image is finally formed on the image forming surface of the image sensor by the lens unit 101 including these lens groups. Reference numeral 102 denotes an image sensor (CCD; charge coupled device) that converts light into electric charge and generates an image signal. Reference numeral 103 denotes a camera signal processing unit that performs predetermined processing on the imaging signal and outputs digital image data. Reference numeral 104 denotes a microphone unit (corresponding to the microphone 209 in FIG. 2), which includes a predetermined amplifier, a band limiter, an AD converter, and the like, and converts the sound input at the time of photographing into digital sound data and outputs it.
[0020]
Reference numeral 105 denotes a compression processing unit, which performs compression processing such as MPEG in real time on the digital image data sent from the camera signal processing unit 103 and the digital audio data sent from the microphone unit, and converts the compressed video data into Output. The compression processing unit 105 also has a function of compressing still images by the JPEG method or the like and outputting compressed still image data. Reference numeral 106 denotes a disk control unit. Reference numeral 108 denotes a disk, which is composed of a rewritable recording medium such as a magneto-optical disk. The disk 108 is controlled by the disk control unit 106 to write and read data. At this time, for example, reading and writing are performed in a format that can be handled by a personal computer such as a DOS file system. Each compressed video data file stores additional information such as recording time.
[0021]
Reference numeral 109 denotes an expansion processing unit that converts MPEG data read from the disk 108 via the disk control unit 106 into video data and outputs the video data. The decompression processing unit 109 can also convert JPEG data into still image data and output it. The decompression processing unit 109 further has a function of reducing and enlarging the image to an arbitrary size and outputting it. Reference numeral 111 denotes a mixer that selects and outputs one of the camera image signal from the camera signal processing unit 103 and the reproduction image signal from the expansion processing unit 109 under the control of the microcomputer 107, and the necessary information. Or a bitmap or the like is superimposed on the image signal. The mixer 111 has two output stages, and these can be controlled independently.
[0022]
110 is an EVF (corresponding to the electronic viewfinder 204 in FIG. 2), 112 is a liquid crystal panel (corresponding to the liquid crystal panel 208 in FIG. 2), and receives the image signals output from the mixer 111, respectively. The EVF 110 and the liquid crystal panel 112 have independent power supplies, and can be turned on and off independently of the system under the control of the microcomputer 107. Reference numeral 113 denotes a panel open / close detection switch (corresponding to the panel open / close detection switch 211 in FIG. 2), which informs the microcomputer 107 of the open / closed state of the liquid crystal panel 112. Reference numeral 114 denotes a speaker unit (corresponding to the speaker 209 in FIG. 2), which receives an audio signal sent from the expansion processing unit 109 when reproducing MPEG data and reproduces the audio. The speaker unit 114 also varies the volume under the control of the microcomputer 107.
[0023]
Reference numeral 115 denotes an operation switch group (corresponding to the operation switch group 207 in FIG. 2), which is used when the user operates the device. Reference numeral 115_a denotes a set key, which is pressed when determining or executing selection of an item displayed on a menu or the like. 115_b is a plus key and 115_c is a minus key, which is also used when selecting one of a plurality of items displayed on a menu or the like. 115_e is a reproduction key. 115_f is a play list key, and when the user presses this key, the play mode is switched to. Reference numeral 115_g denotes a menu key, which is pressed by the user when it is desired to change to a menu mode for displaying various setting items, function items with low usage frequency, or the like, or to exit from the menu mode. The operation switch group 115 includes at least these keys.
[0024]
Reference numeral 116 denotes a mode dial (corresponding to the mode dial 206 in FIG. 2), which is a switch for selecting a reproduction mode, a camera mode, and OFF. Reference numeral 117 denotes a trigger switch (corresponding to the trigger switch 205 in FIG. 2), which generates a shooting start point event and a shooting end point event each time the camera mode is set, and instructs to record a moving image. Reference numeral 118 denotes a still image trigger switch, which is a switch for executing still image shooting. The mode dial 116 and the trigger switch 117 are switches for the user to operate similarly to the operation switch group 115, and are independent here, but may be added to the operation switch group 115. In FIG. 2, the illustration of the still image trigger switch 118 is omitted.
[0025]
A battery 130 (corresponding to the battery 210 in FIG. 2) supplies power to each block of the main body. Reference numeral 121 denotes a remaining amount detection unit that measures the remaining amount of the battery 130 and transmits battery remaining amount data to the microcomputer 107. On the other hand, 131 is an AC unit, which is an adapter used when DC power is supplied from a household AC power source to the main body. The AC unit 131 also has a charging function for the battery 130. The microcomputer 107 receives an AC unit detection signal indicating whether the AC unit 131 is attached to the main body.
[0026]
Next, the playback mode set for this video camera will be described.
[0027]
FIG. 3 shows an example of a video clip playback selection screen.
[0028]
In the figure, reference numeral 301 denotes a display screen which is displayed on the EVF 110 and the liquid crystal panel 112. In addition, a video output terminal for displaying on a TV monitor, an IEEE 1394 terminal for connecting to a PC, a digital TV, a VCR, a USB terminal, and the like are mounted, and a TV monitor, a PC, a digital TV, and a VCR are included. If they are connected to each other, the above screen is also displayed on them. Reference numerals 303 to 308 are representative images of the video clip. A representative image is an image obtained by reducing one frame in a moving image of a video clip to a predetermined size. This representative image is stored in the header portion of the video clip file or is generated when necessary.
[0029]
Reference numeral 309 denotes a cursor for selecting a video clip. In FIG. 3, the representative image 305 of the video clip is selected. The cursor 309 is moved by a user key operation. Reference numeral 310 denotes a slider, and 311 denotes a pointer, which graphically represents which part of the thumbnail (representative image) group currently displayed corresponds to.
[0030]
Reference numeral 302 denotes video clip information on which information related to the video clip pointed by the cursor 309 is displayed. In the example of FIG. 3, the upper information of the video clip information 302 indicates that the video clip 305 is the 15th when sorted in the order of a predetermined method among the 30 video clips recorded on the disc. Yes. The lower information of the video clip information 302 is the file name of the video clip pointed by the cursor 309. When the playback key 115_e for executing playback is pressed here, playback of the video clip (video clip 305 in FIG. 3) pointed to by the cursor 309 at that time is started. For example, the video clip 305 is displayed on the entire screen. Is displayed. When the reproduction ends, the screen returns to the display screen 301 for selecting a video clip. Instead, unless the stop key is pressed, the next video clip may be sequentially played back until the last video clip is played back.
[0031]
Reference numeral 312 denotes a battery remaining amount display. It consists of an icon that looks like a battery, and the square inside the frame shows the remaining capacity. In the example shown in FIG. 3, the number of squares changes between 3 and 0 in descending order of the remaining amount, and further five levels can be displayed by blinking the frame. Further, the operating time may be displayed together by increasing the accuracy of the remaining amount detection. The display screen 301 may display various information such as whether or not a disk is mounted. The cursor 309 may be displayed by a display method that surrounds the representative image like a frame.
[0032]
FIG. 4 is a diagram showing a tree structure of video files and management files stored on the disk 108. Here, file names and directory names generated by the microcomputer 117 and stored in the disk 108 are shown.
[0033]
In the figure, reference numerals 702 to 704 denote directories for storing video files, and reference numeral 701 denotes a parent directory thereof. Reference numerals 705 to 707 denote video file (or still image file) groups stored in each directory. A file name is shown in each block frame in the file group 705 to 707. The file name extension (below a period) is MPG, and the JPG file is a still image file. As a rule for generating a video file name, ABCD0001. mpg to ABCD0100. A file name is generated by adding the last four digits of the code excluding the extension one by one, such as mpg. Here, for convenience of explanation, the file name in each block frame is referred to as ABCD0100. After generating up to mpg, the next generation is to create the next directory and provide a file group there. In the present embodiment, the upper four digits of the code excluding the extension of the file name are fixed. However, instead of this, for example, it may be changed for each directory. In the example shown in FIG. 4, the first shooting is performed, and the directory 702 is created when the video file is saved. In the example of FIG. 4, the directory 702 already has ABCD0100. Since the files up to mpg are stored, the process moves to the next directory 703 and similarly to the directory 704.
[0034]
In this embodiment, the directory names of the directories 702 to 704 are a three-digit number + fixed character string. Similarly to the file name, the directory name is created by incrementing the number by one.
[0035]
Reference numeral 708 denotes a directory for storing a file necessary for realizing the additional function, and the directory name is MISC. Reference numerals 709, 710, 711, and 712 denote playlist files (script files) described later, and the file names are PLIST01. PLF to PLIST04. PLF.
[0036]
Now, an apparatus that employs a disk as a recording medium as described herein can randomly access data stored on the disk. In the playback mode described above, when a clip is selected and played back, playback can be started much faster than with tape. In addition, the video camera of the present invention is equipped with a playlist mode taking advantage of random accessibility. Next, this playlist mode will be described.
[0037]
The playlist (script data) is data for controlling the playback procedure of various data recorded on the disc. For example, in the present embodiment, a plurality of contents to be played back are selected in advance and their generation order is selected. In addition to this, it is stored on the disc and the main body. At the time of reproduction, a series of reproduction is executed simply by selecting the list. An example of selection will be described later. The contents that can be selected and specified vary from the selection of the reproduction content and the reproduction order, to the designation of the size and position of the image, and the designation of a plurality of contents at the same time. When this information is recorded on a disc, it is saved as binary data or as text in a description format such as HTML. As an example of the latter, there is a synchronized multimedia integration language (SMIL) created and published by the World Wide Web Consortium (W3C). Many player software that reproduces moving images, still images, sounds, etc. of personal computers are compatible with this. In the present embodiment, the file name PLIST01. PLF, PLIST02. PLF, PLIST03. PLF, PLIST04. Each playlist file 709 to 712 of the PLF is a file in which playlist information edited and stored by the user is described, and four playlists are stored in the video camera of the present embodiment. In the present embodiment, since there is no feature in the playlist editing operation, the description is omitted.
[0038]
Next, a description example will be described in a playlist file (script file).
[0039]
FIG. 5 shows the file name PLIST01. It is a figure which shows an example of the content of the playlist file 709 of PLF.
[0040]
In the figure, reference numeral 801 denotes a list representing the contents of the playlist file 709. Here, the list 801 is handled as HTML text, and is described using HTML tags. Reference numeral 802 denotes a tag representing the start of the list, and reference numeral 818 denotes an end. Reference numeral 803 denotes the start of the header part, 810 denotes the end of the header part, and additional information and the like are described between them. Reference numeral 809 denotes an example of additional information, and reference numeral 804 denotes a keyword meta representing additional information. The meta 804 has an information name and contents. Reference numeral 805 denotes an information name keyword name, and reference numeral 807 denotes a content keyword content. Reference numeral 806 denotes a value of name 805, which is “title” here, and 808 denotes a value of content 807, which is “summer travel” here.
[0041]
Reference numeral 811 denotes a start of the main body, and 817 denotes a tag indicating the end of the main body. A plurality of video clips described between them are reproduced in order from the top. Reference numerals 815 and 816 denote video tags, which designate video clips to be reproduced. Reference numeral 813 denotes an identifier src indicating a file name. Reference numeral 814 denotes a file name of the designated video clip, which is represented by a relative path from the playlist file 709. The video tag 816 is similar to the video tag 815. When playback based on the playlist file 709 illustrated here is executed, the video clips ABCD0101... In the parent directory DCIM701 / directory 101IMAGE702 are displayed. MPG is played, and then the video clip ABCD0102. The MPG is played and ends.
[0042]
When still images are specified as a playlist, there is basically no concept of time for still images, so a playback time is specified for each still image, or each still image is played back at a uniform predetermined time. Specify as follows.
[0043]
Next, a process for selecting one of a plurality of playlist files will be described.
[0044]
FIG. 6 is a diagram showing an example of a screen when the playlist mode is set by setting the mode dial 116 to the playback mode and pressing the playlist key 115_f.
[0045]
In the figure, 401 is a playlist selection screen, which shows the entire screen. Reference numeral 402 denotes a title displayed to notify that the current playlist mode is set. Reference numerals 404 and 406 denote thumbnail images (representative images), which display thumbnail images of video clips described in the currently selected playlist file in the order of playback. Reference numeral 405 denotes an arrow indicating the flow of reproduction from the video clip of the left thumbnail image to the video clip of the right thumbnail image. Reference numeral 420 denotes a playlist table, which is a list of a plurality of playlists currently recorded, and displays a column number (No), a creation date, a total time required for reproduction, the number of scenes, and a title. Reference numeral 421 denotes an instruction band, which indicates the currently selected playlist column. Reference numerals 422 and 423 are warning icons. 2 and no. 4 indicates that a warning exists in the playlist. The playlist is selected by moving the indication band 421 up and down by pressing the plus key 115_b and the minus key 115_c. Here, it is assumed that pressing the plus key 115_b moves downward, and pressing the minus key 115_c moves upward. If there are more playlists that do not fit in the playlist table 420, scrolling is used to display them.
[0046]
In the example shown in FIG. One playlist is selected, and the total time required to reproduce this playlist is 15 minutes 20 seconds, and the number of scenes is two. Therefore, two thumbnail images (404, 406) are displayed in the upper half of the playlist selection screen 401.
[0047]
Next, no. A case where the second playlist is selected will be described.
[0048]
7 shows that the plus key 115_b is pressed once on the playlist selection screen shown in FIG. It is a figure which shows a playlist selection screen when 2 playlists are selected.
[0049]
When the plus key 115_b is pressed once, the indication band 421 is lowered by one step and 2 playlists are selected and instructed. Therefore, in the upper half of the playlist selection screen 401, no. For example, five thumbnail images 504, 506, 508, 510, and 512 described in the two playlists are arranged in order. Reference numerals 507, 509, and 511 denote arrows, and similarly to the arrow 405, indicate the flow of playback of a video clip represented by a thumbnail image.
[0050]
A dialog 503 displays the contents of the warning icon 422. The dialog 503 displays a warning that “The current battery level cannot be played back to the end”. The remaining amount detection unit 121 shown in FIG. 1 calculates the reproducible time by the microcomputer 107 from the battery remaining amount data and the operating state of the device, and compares this with the total time of the playlist. A warning is issued when the total time is longer. The operation state of the device here refers to a block state other than the reproduction operation itself such as whether the liquid crystal panel 112 is ON or OFF. No. This warning is not displayed for a playlist that can be played to the end with the current remaining battery level, such as one playlist. This comparison is performed every predetermined time. When the AC unit 131 is connected, it is assumed that all playback is possible, and this warning display is not performed.
[0051]
Reference numeral 513 denotes a non-reproducible area, and it is predicted that the video clip of the thumbnail image surrounded by this area is predicted to be shut down due to insufficient battery power before being reproduced. In the example shown in FIG. 7, the non-reproducible area 513 overlaps the thumbnail image 510 by about half. In this case, the ratio of the portion of the video clip of the thumbnail image 510 that is predicted to be non-reproducible is the overlapped portion. Is shown.
[0052]
In this embodiment, a warning is issued when the remaining battery level is insufficient during playlist playback for video clips, but playlist playback for moving image or audio files is performed. Sometimes a warning may be generated even when the remaining battery level is insufficient.
[0053]
In the present embodiment, the warning is performed by image display. Instead, the warning may be performed by voice, or both of them may be performed.
[0054]
In this embodiment, each time the playlist mode is set, the total time of each playlist file is calculated. Instead, for example, the additional information described with reference to FIG. 5 is represented. When the keyword meta includes a time required for reproduction, it can be written at the time of generating a playlist using the generated playlist. If the reproduction time is not included in the meta data, the total time may be calculated and added at the time of generating the playlist when the playlist is generated.
[0055]
As described above, according to the first embodiment, before playback, the user is informed whether or not the entire selected playlist can be played back with the current remaining battery level. It is intended to improve. Further, in determining whether or not playback is possible, the microcomputer 107 calculates a playable time from the battery remaining amount data and the operating state of the device, and compares this with the playback required time of the playlist. A warning is issued when the playback time is longer. That is, a specific method for determining whether or not all the playback content can be played back to the end when battery-driven playback is performed enables commercialization.
[0056]
[Second Embodiment]
Next, a second embodiment will be described.
[0057]
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 used and only different components are described.
[0058]
In the second embodiment, the contents of the control process performed in the microcomputer 107 are different from those in the first embodiment.
[0059]
In the first embodiment, a warning is issued when it is determined that the remaining battery level is insufficient in playlist reproduction or the like. For example, all the files described in the playlist file are stationary. In the case of an image or the like, the reproduction time per image may be reduced so that the image can be reproduced to the end with only the remaining battery level.
[0060]
Therefore, in the second embodiment, in the reproduction selection screen shown in FIG. When the selection instruction to reproduce the second playlist is given, the user can select whether to perform the normal playlist reproduction or the shortened playlist reproduction. In the playback selection screen shown in FIG. When the selection instruction to reproduce the play list 2 is given, the screen shown in FIG. 7 may be displayed first, and then the screen shown in FIG. 8 may be displayed.
[0061]
FIG. 8 shows No. 1 on the playback selection screen shown in FIG. It is a figure which shows the screen 901 displayed when selection instruction | indication to reproduce | regenerate 2 play lists is given.
[0062]
In the figure, reference numeral 901 denotes No. in the screen shown in FIG. This is a screen that is displayed when a playlist is selected, that is, when it is determined that the entire playlist cannot be reproduced with the current remaining battery level. 903 is a playlist number. And the title. 904 is a dialog that warns that the selected playlist cannot be played to the end with the current battery level, and allows playback to the end by shortening the playback time, or normal playback The user is asked whether or not to perform. Reference numeral 905 denotes a user option for the inquiry in the dialog 904, which is “Yes”, “No”, and “Return” from the top. If “Yes” is selected here, the abbreviated playlist playback starts, “No” selects the normal playlist playback, and “Return” returns to the previous screen. It is also possible to make the specification to exit the playlist mode by selecting “Return”. A cursor 906 is used by the user to select and instruct which of a plurality of options 905 to select. As an operation, the cursor 906 is moved up and down with the plus key 115_b and the minus key 115_c, the set key 115_a is used for the determination, and a transition to the corresponding next step is made.
[0063]
As a shortening method in the reproduction of the shortened playlist, for example, when all the reproduction files are related to a still image and each reproduction time is designated, they are shortened at the same reduction ratio.
[0064]
As described above, in the second embodiment, it is possible to know in advance whether or not the playlist can be reproduced to the end based on the remaining battery level. If so, it is possible to reproduce the entire content in a digest manner by shortening the reproduction time.
[0065]
[Other embodiments]
An object of the present invention is to supply a storage medium storing software program codes for realizing the functions of the embodiments to the system or apparatus, and the computer of the system or apparatus (or CPU, MPU, etc.) stores it. It is also achieved by reading and executing the program code stored on the medium.
[0066]
In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention.
[0067]
Examples of the storage medium for supplying the program code include a floppy (registered trademark) disk, a hard disk, a magneto-optical disk, a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVD-RAM, and a DVD. -RW, DVD-R, magnetic tape, nonvolatile memory card, ROM, etc. can be used.
[0068]
Further, by executing the program code read by the computer, not only the functions of the above embodiments are realized, but also an OS (operating system) running on the computer based on the instruction of the program code Includes a case where the function of the above-described embodiment is realized by performing part or all of the actual processing.
[0069]
Further, after the program code read from the storage medium is written in 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 includes a 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 functions of the above-described embodiments are realized by the processing.
[0098]
【The invention's effect】
  As detailed above, according to the present invention,Whether information on multiple playlists is displayed on the list screen and whether each playlist displayed on the list screen can be played to the end based on the playback time of each playlist and the drivable time according to the remaining battery level The warning information is displayed on the list screen for those that cannot be reproduced until the end. As a result, before the playlist is selected and played back, it can be easily confirmed on the list screen whether each playlist can be played to the end with the current remaining battery level.
[0099]
As a result, a specific method can be provided for determining whether or not all of the playback content (media data file) can be played back to the end when playback is performed on battery power, and a playlist function associated with power shortage during battery operation. It is possible to realize the commercialization of a recording / reproducing apparatus that solves a specific problem.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a control system of a video camera according to a first embodiment.
FIG. 2 is an external view showing a configuration of a first embodiment of a recording / reproducing apparatus according to the present invention.
FIG. 3 is a diagram showing an example of a video clip playback selection screen.
FIG. 4 is a diagram showing a tree structure of video files and management files stored on a disc.
FIG. 5 shows a file name PLIST01. It is a figure which shows an example of the content of the playlist file of PLF.
FIG. 6 is a diagram showing an example of a screen when the playlist mode is set by setting the mode dial to the playback mode and further pressing the playlist key.
7 shows a playlist selection screen shown in FIG. It is a figure which shows a playlist selection screen when 2 playlists are selected.
FIG. 8 shows the No. 2 on the playback selection screen shown in FIG. It is a figure which shows the screen displayed when selection instruction | indication to reproduce | regenerate 2 play lists is carried out.
[Explanation of symbols]
101 ... Lens unit
102 ... CCD
103 ... Camera signal processing section
104 ... Microphone unit
105: Compression processing unit
106: Disk control unit
107... Microcomputer (reproduction time detection means, drivable time calculation means, determination means, warning means)
108... Disc (recording medium)
109 ... Decompression processing unit
110 ... Electronic viewfinder (EVF)
111 ... Mixer
112 ... Liquid crystal panel
113 ... Panel open / close detection switch
114 ... Speaker unit
115 ... operation keys
116 ... Mode dial
117 ... Trigger switch
121... Battery remaining amount detection unit (power remaining amount detection means)
131 ・ ・ ・ AC unit
201 ... Video camera body
202 ... Lens part
203 ... Microphone
204 ... Electronic viewfinder (EVF)
205 ... Trigger switch
206 ... Mode dial
207 ... Operation switch group
208 ... Liquid crystal panel
209 ... Speaker
210 ... Battery
211 ... Panel open / close detection switch
212 ... Bar
301 ... Display screen
302 ... Video clip information
303-308 ... Representative image of video clip
309 ... Cursor
310 ... Slider
311 Pointer
312 ... Remaining battery capacity

Claims (4)

A recording / reproducing apparatus driven by a battery,
A plurality of media data files each including at least one of a moving image, a still image, and sound; a plurality of playlists each specifying the media data file and specifying a playback procedure of the specified media data file; Recording / reproducing means for recording / reproducing information on a recording medium;
Display means for displaying a list screen showing information of the plurality of playlists recorded on the recording medium;
Selecting means for selecting any one of a plurality of playlists shown on the list screen;
Playback control means for playing back the media data file by a playback procedure according to the selected playlist by the recording and playback means;
Reproduction time detecting means for detecting the reproduction time required for reproducing the media data file according to the reproduction procedure designated by the plurality of playlists recorded on the recording medium for each of the plurality of playlists;
Calculating means for calculating a drivable time based on the remaining power of the battery;
Based on the reproduction time detected by the reproduction time detection means and the drivable time calculated by the calculation means, the media data file designated by each of the plurality of playlists shown on the list screen is lastly displayed. A determination means for determining whether or not playback is possible,
Based on the determination result of the determination unit, the display unit displays warning information of a playlist that cannot play the specified media data file to the end among the plurality of playlists displayed on the list screen. And a control means for controlling the recording / reproducing apparatus. The control unit further controls the display unit to display, on the list screen, information indicating an area that cannot be played back due to a shortage of the remaining battery power, for a playlist that cannot play the specified media data file to the end. The recording / reproducing apparatus according to claim 1. The display means displays thumbnail images of media data files designated in the selected playlist on the list screen in the order of reproduction, and cannot reproduce the media data file designated by the selected playlist to the end. 3. The recording / reproducing apparatus according to claim 2, wherein the thumbnail image of the selected playlist and the information indicating the unreproducible area are displayed in an overlapping manner. A plurality of media data files each including at least one of a moving image, a still image, and sound; a plurality of playlists each specifying the media data file and specifying a playback procedure of the specified media data file; Recording / reproducing means for recording / reproducing information on a recording medium, display means for displaying a list screen showing information on the plurality of playlists recorded on the recording medium, and a plurality of playlists shown on the list screen And a playback control means for playing back the media data file by a playback procedure according to the selected playlist by the recording / playback means, and a battery-driven recording / playback apparatus The playback method of
A reproduction time detecting step of detecting, for each of the plurality of playlists, a reproduction time required to reproduce the media data file according to a reproduction procedure designated by the plurality of playlists recorded on the recording medium;
A calculation step of calculating a drivable time based on the remaining power of the battery;
Based on the reproduction time detected in the reproduction time detection step and the drivable time calculated in the calculation step, the media data file designated by each of the plurality of playlists shown on the list screen A determination step for determining whether or not the video can be played to the end;
Based on the determination result in the determination step, among the plurality of playlists shown on the list screen, a warning for a playlist that cannot reproduce the specified media data file to the end. And a control step for controlling the display means to display notification information on the list screen.

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