JP2004180340A - Video recording apparatus, video reproducing apparatus, video recording method, and video reproducing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve operability in miniaturized equipment by searching, sorting and deleting a large quantity of recorded data easily at high speed. <P>SOLUTION: The digital audio-visual recording and reproducing apparatus includes a motion video signal recording and reproducing means, a still picture signal recording and reproducing means, a digital audio signal recording and reproducing means for recording synchronous with video, a display means capable of displaying a motion video signal and a still picture video signal, and a recording condition recording means for recording recording conditions including the data information of recording data for distinguishing the motion video and the still picture video and recording time information for recording video or audio, wherein on a display screen of the display means for displaying the video signals, the recording conditions composed of the data information and the recording time information of the recording data at least are indicated by graphic display or character display to select the displayed recording data on the display screen. <P>COPYRIGHT: (C)2004,JPO

Description

  The present invention relates to a technique relating to operability of a portable digital video camera.

  As a conventional technique, as disclosed in Japanese Patent Application Laid-Open No. 2-292974, there is an electrophotographic system for recording a still image signal as a video signal in a semiconductor memory, a so-called electronic still camera. In recent years, with the spread of personal computers, recording media such as semiconductor memories and hard disks have been reduced in price, miniaturized, and increased in capacity. On the other hand, advances in signal compression technology represented by JPEG and MPEG have led to the It has become possible to record more still images and moving images, and a hard disk having a card size of about 300 Mbytes has been realized.

  In this case, about 3000 still images can be recorded as still images using JPEG compression, and about 20 minutes can be recorded as moving images using MPEG compression. Therefore, there is a need to improve the operability in order to search, sort, delete, and the like a large amount of recorded data with a small device. However, JP-A-2-292974 described above does not disclose a means for searching a large amount of recorded data at high speed and easily, and there is only a method for searching while checking all reproduction screens.

JP-A-2-292974

  When 3,000 JPEG still images are recorded using a medium that can be realized by the above-described hard disk, and a search is performed while developing a playback screen, it generally takes about one second to develop one image. It takes about 1 hour to develop 3000 sheets, which is practical. Therefore, in order to search a large amount of data, it was necessary to enable high-speed processing of the system.

  It is an object of the present invention to solve the above-mentioned problems and to provide means for improving operability with a small device.

  In order to solve the above problems, the present invention provides a recording unit that simultaneously records shooting time information and shooting mode information for distinguishing a moving image, a still image, and the like when shooting a still image or a moving image, and stores the information in a main body during playback. Improves operability on small devices by providing display means for displaying a list on the built-in liquid crystal screen and also displaying a reduced image, and key input means for searching, sorting, and deleting recorded data. It was possible to do.

  As described above, according to the present invention, even if the number of data that can be recorded on one recording medium increases due to the increase in the capacity of the recording medium and the progress of compression technology, the operation can be performed with very few keys. Thus, it is possible to improve the operability of a small device having a limited space.

  First, marks for each mode, such as moving images, still images, and audio with still images, and data recording date and time information can be displayed in a list, so that the user can efficiently and quickly understand the contents of the data. Then, a search or the like can be performed. Also, at the time of recording, each time the mode is switched, the above mark is also switched and displayed on the shooting screen so that the user can know which mode can be used in shooting. Can record.

  In addition, the display list is composed of the date and time, all of which are automatically created and, at the same time, a reduced display screen can be displayed, so that the user can more easily understand the contents of the data.

  Further, since the photographed data can be classified into a predetermined place, it can be organized by relying on mode information, date and time information, etc., according to the situation and purpose of photographing, and the search is further facilitated.

  In addition, since the display order of the list display and the data reproduction order can be switched by relying on the mode information and the date and time information, an optimum reproduction effect can be always obtained regardless of the recording order.

  The provision of a classification that can be temporarily discarded prevents not only erasure due to an erroneous operation but also enables unnecessary data to be reused when the necessity arises after the erasure operation.

  As described above, even when a large amount of data is recorded by a relatively simple operation on the graphic screen, the search can be performed at a higher speed than when reproducing while expanding all the screens.

  An embodiment of the present invention will be described below with reference to FIGS.

  FIG. 1 shows the flow of software according to an embodiment to which the present invention is applied.

  FIG. 2 is an example of the appearance of a portable digital video camera 200 on which the software of the embodiment shown in FIG. 1 operates. The unit 200 can record and reproduce NTSC or PAL television signals.

  FIG. 3 is an enlarged view of the operation switch portion of the embodiment of FIG. The overall configuration of the portable digital video camera 200 shown in FIG. 2 is such that a digital moving image signal obtained from a camera system is compressed into an MPEG (Moving Picture Expert Group) 1 format and recorded on a memory card. In reproduction, an MPEG1 format signal recorded on a memory card is developed and displayed on the built-in display device 201. The display device may be a display device connected to the outside. The portable digital video camera 200 of FIG. 2 can record an audio format of JPEG which is still image data and MPEG which is audio data in addition to MPEG moving image data.

  FIG. 4 schematically shows a circuit block of the portable digital video camera 200. First, an example of a procedure for recording a moving image using the portable digital video camera 200 will be described. When the recording switch 301 is pressed by the user, the subject image obtained from the lens 401 is converted into an electric signal by the CCD sensor 402. The signal read from the sensor 402 is subjected to electrical processing by a circuit 403 integrating a CDS (Correlated Double Sampling) circuit for suppressing low-frequency noise and an AGC circuit for performing automatic gain control to stabilize the signal level. After that, it is converted into a digital signal by the ADC 404 and input to the camera signal processing circuit 405.

  A camera signal processing circuit (camera DSP) 405 converts a sensor output digital pixel signal into a luminance signal Y and color difference signals U and V by a matrix circuit, adds a synchronization signal, and adjusts the relationship between iris and shutter speed. It is composed of a function, a function for adjusting white balance, a function for digitally zooming in and out, and the like. Although not shown in detail in FIG. 4, the camera DSP 405 outputs a horizontal / vertical drive signal pulse of the CCD sensor 402 and reads out the signal of the CCD sensor 402 while keeping the timing with the synchronization signal. Further, the camera control microcomputer 406 supplies parameters for the operation of the DSP 405 to the camera DSP 405 and controls the entire camera system.

  On the other hand, the digital luminance signal Y and color difference signals U and V obtained from the camera DSP 405 are sent to an encoder 409 of MPEG1, which is a standard compression format of moving picture digital signals, by a digital bus line, where the data is compressed and converted into digital data. Is converted. Reference numeral 410 denotes a work memory for performing MPEG1 encoding. The data converted to MPEG1 is sent to a microcomputer 411 that controls the transmission rate of digital output data, and the entire moving picture compression system is configured together with the MPEG1 encoder 409.

  The microcomputer 411 that controls the transmission rate stores a fixed amount of the data in the MPEG1 format in the buffer memory 412, passes through the interface circuit 413, passes through the PCMCIA standard card connector 414 having 68 pins, and outputs the PCMCIA ( The data is transferred to a memory card type hard disk (hereinafter, HDD) 415 of the PC card standard defined by Personal Computer Memory Card International Association.

  Here, the method of recording a moving image has been described in detail. On the other hand, when the still image recording mode is selected by the user, the MPEG encoder 409 is switched to a JPEG compression circuit, and still image data is generated from 409 and sent to the microcomputer 411. MPEG-compressed data processing and JPEG-compressed data processing have many points in common, and are known as effective methods because the circuit scale can be saved.

  The audio signal is converted from a microphone 418 into an analog electric signal, converted into digital data by an audio ADC 419, fetched into the data bus by an MPEG encoder 409, and compressed by a microcomputer 411 according to the MPEG format. This is executed by software, and is added in time series with the moving image video or still image video data.

  In the present embodiment, the portable digital video camera 200 can record JPEG-formatted data and MPEG1-formatted audio-only data in addition to MPEG1-formatted data.

  At this time, the microcomputer 411 records a code indicating any one of the date and time when the recording switch 301 was pressed, the data in the MPEG1 format, the data in the JPEG format, and the data of only the audio in the MPEG1 format. You. In addition, a code indicating a classification and a code indicating whether to prohibit an operation of deleting recorded data are recorded as means for searching recorded data. At the time of recording, the classification is temporarily recorded as a code indicating that the classification is not performed, and a code indicating that the deletion operation is possible or not, and that the classification is possible.

  Here, the code indicating the shooting mode is determined using a code indicating a data type in a general disk operation system. Further, a code indicating a classification and a code indicating whether data can be deleted are recorded in individual files associated with the data.

  On the other hand, as a monitor signal at the time of recording, a digital signal input to the camera DSP 405 becomes an analog television signal by the NTSC or PAL encoder and DAC built in the circuit 405, and is output to the output terminal 416 and the built-in display device 201. . In this example, the moving image data with audio of MPEG1 has been described. However, the same processing is performed with data of only JPEG and MPEG1 audio.

  When the system is in the reproduction mode, the signal flows in a direction opposite to the recording mode. FIG. 16 is a flowchart showing this. First, text data indicating data information is read from the HDD 415. Next, the user searches for data from a list of data, which is a feature of the present invention, displayed on the built-in display device 201, and specifies data to be reproduced using the operation switch 408. Then, the file system is started, and data is read from the HDD 415 to the microcomputer 411.

  Here, the type of data is determined, and in the case of a moving image, MPEG video decoding and MPEG audio decoding, in the case of a still image, decoding of a JPEG video, and in the case of audio with a still image, decoding of a JPEG video, MPEG audio Are decoded, and the reproduced image is displayed.

  Here, the instruction signal from the operation switch 408 is read by the sub-microcomputer 407 and sent to the microcomputer 411 via the camera control microcomputer 406. Further, the software program of the present embodiment is read out from the ROM 417 (Read Only Memory) for storing the program and executed. In the present embodiment, the program storage location is the ROM 417, but a storage device such as a FlashRAM or an HDD may be used.

  Next, this data is transferred to the buffer memory 412 via the PCMCIA connector 414 and the interface circuit 413. The timing of the data stored in the buffer memory 412 is controlled by the microcomputer 411 and sent to the MPEG1 decoder 409. The circuit 409 is configured to switch between encoding and decoding of MPEG1.

  The data decoded by the MPEG1 decoder 409 is sent to the camera DSP circuit 405 via a digital bus line, and is converted into an analog video signal by the NTSC or PAL encoder and DAC built in the circuit 405, and is output to the output terminal 416 and the built-in display device 201. Is output to the outside of the device. In this example, the moving image data with audio of MPEG1 has been described. However, the same processing is performed with data of only JPEG and MPEG1 audio.

  In the present embodiment, since an HDD having a capacity of 260 MB is used for the HDD 415 serving as a storage device, especially when only a still image in the JPEG format is recorded, about 3000 still image data can be recorded. According to the present invention, a high-speed and easy search can be performed by using the function of classifying 3000 data.

  FIG. 4 shows a circuit configuration for moving image video, but a circuit configuration corresponding to FIG. 4 is required for still image video and audio. That is, in the present invention, the moving picture video, the still picture video converting means, the still picture video digital converting means, the still picture video digital converting means, the sound digital converting means, the moving picture video, the still picture And audio digital signal recording means.

  FIG. 5 shows an embodiment of the present invention in which the screen size of the built-in display device 201 is 1.8 inches (45.7 mm) diagonally, that is, 36.6 mm wide and 27 mm long. 1 shows a screen display configuration when a liquid crystal panel having a pixel configuration of 352 pixels × 240 pixels is used. In order to realize low power consumption and miniaturization of the portable digital video camera 200, a 1.8-inch liquid crystal was used for the built-in display device 201. The built-in display device 201 displays a shooting screen based on a monitor signal during recording, a search screen based on software during search, and a playback screen based on decoded data during playback.

  During recording, a moving image recording mode (compression recording mode by MPEG), a still image recording mode (compression recording mode by JPEG), and the like are switched each time the mode selection button 202 is pressed. The user can select a recording mode by using this button. On the display screen, every time the mode is switched, a mark for each mode at the upper left of the shooting screen is switched as shown in FIGS. It has become.

  FIG. 17 shows a shooting screen when the still image recording mode is selected at the time of recording, and reference numeral 1701 denotes a mark indicating the still image mode. FIG. 18 shows a shooting screen when the moving image recording mode is selected at the time of recording, and reference numeral 1801 denotes a mark indicating the moving image mode. By displaying the mark for each mode, the user can visually recognize in which mode the user switches to a mode that is switched every time one mode selection button is pressed. For this reason, the user can operate the camera without taking his / her eyes off the shooting screen displayed during recording, which is convenient.

  The same mark as the above-mentioned mark for each mode is also displayed on a search screen by software at the time of search from the data holding unit. The search screen including this will be described later in detail. In the portable digital video camera of the present invention, a mark is used as shown in the mark diagram for each mode in FIG. 19, but the present invention is not limited to this. It goes without saying that it does not matter.

  The screen display configuration 500 can display a maximum of 20 characters x 9 characters composed of 16 pixels x 24 pixels. The character size of 16 pixels × 24 pixels is the minimum size that can be easily recognized as a character in the 1.8-inch liquid crystal used in the present embodiment, and efficient encoding when binarizing character data. Is compatible. The margins on the left side of the screen 501, the right side of the screen 502, the upper side of the screen 503, and the lower side of the screen 504 are set because the display device connected to the output terminal 416 and the built-in display device 201 cannot display the entire area of this screen.

  The operation state display area 505 is an area for displaying a state in which the software of the present embodiment is operating. An area 506 is an area for displaying a small screen for displaying information of recording data and a function to be operated when a user presses the function switch 304 to perform detailed setting of data. An operation procedure display area 507 displays an operation procedure that suggests an operation method to the user.

  FIG. 6 is a display screen 600 displayed when the software start switch 303 is pressed by the user to start the software of the present embodiment. The display screen 600 corresponds to the category selection 101 in FIG. 1 showing the state transition of the operation. As described above, data recorded by the user is unconditionally recorded as unclassified at the time of recording. The numbers displayed in the unclassified row 601 represent the number of moving image data with audio 602 of MPEG1, the number of still image data 603 of JPEG, and the number of data 604 of MPEG1 audio only, respectively.

  Similarly, the numerical value displayed on each line of the mark 605 indicating the first classification, the mark 606 indicating the second classification, and the mark 607 indicating the third classification indicates the number of data arbitrarily classified by the user. A mark 608 for collectively displaying all data indicates the total number of the unclassified 601, the first categorized 605, the second categorized 606, and the third categorized 607.

  The mark 609 indicating temporary discard is a classification for temporarily discarding the data so that the user does not accidentally delete the data. The user temporarily moves data that has not been classified and is classified into the first to third categories. It was made possible. The number displayed on the line of the mark 609 indicating the temporary disposal does not include the number displayed on the line of the mark 608 for collectively displaying all data.

  The inversion of the line of the mark 601 indicating the unclassified indicates that the mark 601 indicating the unclassified is selected as an item. However, the expression other than the black and white inverted such as changing the color is also used. No problem. Recorded data whose classification destination has not been changed by the user using this software is included in the classification indicated by the row of the mark 601 indicating unclassification on the display screen.

  When the user presses the up arrow switch 305a in FIG. 3, the selection item moves up one line, and when the down arrow switch 305c is pressed, the selection item moves down one line.

  In the present embodiment, when the user presses the up arrow switch 305a when the selection item is on the item on the first line of the display area 506, that is, the mark 601 indicating unclassification, the selection item is displayed. The processing shifts to the item on the sixth line of the area 506, that is, the mark 609 indicating temporary disposal. When the user presses the down arrow switch 305c when the selection item is on the item on the sixth line of the display area 506, that is, the mark 609 indicating temporary discard, the selection item is displayed on the first line of the display area 506. Item, that is, the mark 601 representing the unclassified state.

  When the right arrow switch 305b is pressed by the user, the screen shifts to a screen displaying the contents of the classification represented by the selected row.

  Also, a guide display 610 of the operation procedure is displayed so that the user can always remember the operation.

  As an example, FIG. 7 shows a display screen 700 for selecting individual data, which is displayed when the right arrow switch 305b is pressed by the user with the mark 605 representing the first classification as a selection item. This function corresponds to the data selection 102 in FIG.

  The display screen 700 is a screen for retrieving and reproducing data from a list of data, which is a feature of the present invention. The user can display data recorded using the portable digital video camera 200 on the date and time when the recording was started. A date 701, a recording start time 702, a mark 703 indicating a type of data content indicating a moving image, a still image, and a sound, a classification mark 704, and a mark 705 for protecting data from being deleted by an erroneous operation can be listed as items.

  The data displayed on the screen 700 is arranged in the order of the recording date 701 and the recording start time 702 from the oldest one to the bottom. For this reason, the latest data recorded most recently is displayed at the top, and data can be searched very effectively. It is also possible to check how many displayed lists are present in the entire recording data and display the pages as 707. In the page display 707, the denominator is the number of the entire list display, and the number of the numerator is displayed.

  Such information automatically records the situation at the time of shooting by the user, such as the recording date and time and the type of data, so that the user's hand is not bothered. In addition, since the user can arbitrarily change the classification destination according to the purpose of use, the task of searching for the target data by the user is extremely simple and efficient.

  Furthermore, since these are all composed of a list list based on character display, time for decompressing the recorded compressed image data is not required, and the screen can be rewritten at high speed when the user selects the operation button. Yes, high-speed search is possible.

  Therefore, comfortable operability can be provided without giving stress to a user who wants to select a recorded image quickly.

  The selection category 706 indicates the category selected on the display screen 600. In this example, a case in which the user selects the first classification 605 on the display screen 600 will be described.

  The display order of the list is displayed in the order recorded in the HDD 415, that is, displayed in the new order according to the recorded date and time. However, the order recorded in the HDD 415 can be changed by a user operation. The display order can also be changed. The data immediately after shooting is recorded at the top of the display area 506 of the unclassified data selection display screen. If the user wants to check the data immediately after shooting, it is only necessary to check the reproduction at the top of the display area 506 of the unsorted data selection display screen.

  As in the case of the display screen 600, when the user presses the up arrow switch 305a, the selection item moves up one line, and when the down arrow switch 305c is pressed, the selection item moves down one line. In the present embodiment, six lines of data are displayed on one screen. However, when the sixth data is selected by the user, when the down arrow switch 305c is pressed, the seventh data is displayed in the display area. The data is displayed on the first line of 506, and the seventh data is selected. The eighth, ninth, and subsequent data are displayed on the second and third rows.

  On the other hand, for example, if the up arrow switch 305a is pressed while the seventh data is selected, the seventh data is displayed on the first line of the display area 506, and the second, third, fourth, The fifth and sixth data are displayed, and the sixth data is selected.

  That is, the n-th data is displayed in the display area 506 in the row of the remaining numerical value when n is divided by 6.

  When the first and last data in the selected row are selected, and when the up arrow switch 305a and the down arrow switch 305c are pressed, the last and last data are respectively set as in the case of the display screen 600. A list including the first data is displayed, and the selected item is the last data and the first data.

  When the user selects the upper arrow switch 305a and the lower arrow switch 305c in FIG. 3 and presses the right arrow switch 305b by the user, the selected data is reproduced on the output terminal 416 and the built-in display device 201.

  While data is being reproduced, the up arrow switch 305a, the down arrow switch 305c, and the left arrow switch 305d of FIG. 3 play the roles of fast forward, rewind, and stop, respectively. When the left arrow switch 305d serving as a stop switch is pressed by the user while the data is being reproduced, the reproduction is stopped and the display screen 700 is displayed again. The state transition in which data is being reproduced is 103 in FIG.

  Next, a display content in which a reduced screen is added to the recording date display so that the content of the data can be easily recognized will be described. When the user presses the reduced image display switch 302 in the state of the display screen 700, a reduced image 801 of the display screen 800 shown in FIG. 8 is displayed. As a result, it is possible to dramatically improve the data searchability. The state transition of the reduced display screen display function corresponds to the state 104 in FIG.

  For example, in the case where the size of the built-in display device 201 of liquid crystal is 1.8 inches and the number of displayable pixels is 379 × 220 dots, the pixel size of the reduced image 801 is set to 64 × 48 dots (the above-described screen size). In the case of a liquid crystal panel having a pixel configuration of 352 × 240 pixels, 240/48 = 5 in the vertical direction and a reduced image of 1/5, and 352/5 = 70.4 in the horizontal direction, and 48 × 4/3 = 64 pixels. A mark indicating the type of the contents of data indicating three reduced images, a recording start date 701, a recording start time 702, a moving image, a still image, and audio at the same time. 703, a classification mark 704, and a mark 705 for protecting data from being deleted by an erroneous operation can be displayed, and the visibility of the reduced image can be secured. As in the case of the display screen 700, data can be reproduced by the operation buttons 305b and the like on the display screen 800.

  When the reduced image display switch 302 is pressed again, the screen display returns to the display screen 600 displaying the data classification. The reduced screen is drawn on the RAM 410 of the circuit block diagram 4 by the control microcomputer 411 and the MPEG encoder 409.

  Next, a function selection display screen 900 that can easily change the display state on the data classification display screen 600 or the data selection display screen 700 will be described. The function selection display screen 900 displays function items on the screen to reduce the number of operation switches and improve the usability of operation while viewing the screen, and operates the operation switches 304, 305a, 305b, 305c, 305d in FIG. Thus, an operation system capable of performing a function selection operation is realized. The state transition of the display screen 900 is 105 in FIG.

  Also, on the reduced screen display screen 800, the screen is displayed in the same procedure, and on the display screen 600, the display having the necessary functions on the display screen 600 shown in FIG. The screen is displayed. In this case, the function items on the display screen 900 may not be the same as the function items on the data classification display screen 600.

  FIG. 10 shows the flow of operations on the display screen 900. The display screen 900 is displayed when the user presses the function switch 304 on the display screen 700. Selection movement of each item is performed by the switch up arrow 305a and the switch down arrow 305c. When the user presses the switch up arrow 305a, the selected item moves to the item displayed one level higher. When the switch down arrow 305c is pressed, the selection item moves to the item displayed one position below. When the user presses the switch right arrow 305b, the function of the selected item is executed. When the function switch left arrow 305d is pressed, the screen returns to the data selection display screen 700.

  As described above, in the present embodiment, the data is deleted by moving the data to the temporary disposal location and then deleting the data included in the temporary disposal location so that the user does not accidentally delete the data. ing. The state transition of this function is 106 in FIG.

  The procedure for deleting data will be described below.

  When deleting data, move the data to a temporary disposal location. In this case, a procedure for selecting and executing “move to trash” will be described with reference to FIG.

  First, on the display screen 700, after the user selects data to be temporarily discarded using the up arrow 305a and the operation switch down arrow 305c, when the function switch 304 is turned down, the display screen 900 is displayed. After the user selects “move to trash” 901 using the operation switch up arrow 305a and the operation switch down arrow 305c, when the switch right arrow 305b is lowered, the selected data is stored in the trash can, which is a temporary disposal place. To move. Similarly, when the switch 306 is pressed by the user, the selected data is moved to a trash can, which is a temporary disposal place.

  When the user selects “empty trash” 902 on the display screen 900, all data in the trash that is a temporary disposal place is deleted. The state transition of this function is 107 in FIG.

  In this operation system, the user performs a two-stage operation for deleting data, so that data is not accidentally lost.

  As described above, at the time of recording, each data is assigned an unclassified state as a classification code. However, during reproduction, the classification can be changed by a user operation. By using this classification function, the data can be classified, so that the user can classify the data according to the purpose of the data, thereby greatly improving the usability of the search function. The state transition of this function is 108 in FIG.

  The procedure for changing the data classification will be described below. When the function switch 304 is pressed on the display screen 700 after the user selects data whose classification is to be changed using the up arrow 305a or the operation switch down arrow 305c, the display screen 900 is displayed. When the user uses the operation switch up arrow 305a and the operation switch down arrow 305c to select "change group" 903, which is a function to change the classification, and presses the switch right arrow 305b, the selection shown in FIG. 11 is made. A display screen 1100 for changing the data classification is displayed.

  When the switch right arrow 305b is pressed on the display screen 1100, the classification is changed in a non-classified manner → 1 → 2 → 3 → unclassified, and the classification is changed. In the present embodiment, the updating of the code for the classification according to the screen display is performed by the user by pressing the switch left arrow 305d to display the display screen 600 in order to speed up the processing and enable the user to perform the operation again. At this time, the control microcomputer 411 performs the operation.

  As described above, unless the user operates the following functions, the order of the list shown on the display screen 700 is the order of the date and time of the recorded data in reverse chronological order. On the other hand, during reproduction, the order can be changed to provide a simple editing function. The state transition of this function is 109 in FIG.

  The procedure for changing the data display order will be described below. First, on the display screen 700, the user selects data whose display order is to be changed using the switch up arrow 305a and the switch down arrow 305c. When the function switch 304 is pressed, a display screen 900 is displayed.

  When the user selects “change data display order” 904, which is a function of changing the display order, using the switch up arrow 305a and the switch down arrow 305c and presses the switch right arrow 305b, the display screen shown in FIG. 1200 is displayed, and the display order of the selected data can be changed. The user specifies the location where the selected data is to be inserted using the switch up arrow 305a and the switch down arrow 305c. Next, when the switch right arrow 305b is pressed, the selected data is inserted at the designated position. At this time, the order of the data located after the designated position before the insertion is changed by one.

  The portable digital video camera 200 of the present embodiment has a built-in clock for displaying the date and time when the data on the display screen 700 was recorded. However, if the image is taken at the time of trouble such as running out of the driving battery, the recorded date and time may not be correctly displayed on the display screen 700. Thus, in the present embodiment, the date and time at which the data was recorded can be arbitrarily changed by a user operation. The state transition of this function is 110 in FIG.

  The procedure for changing the date and time display will be described below. On the display screen 700, the user selects data whose recording date and time is desired to be changed using the switch up arrow 305a and the switch down arrow 305c. Next, when the function switch 304 is pressed, a display screen 900 is displayed. When the user selects “change recording date and time” 905, which is a function of changing the display order, using the switch up arrow 305a and the switch down arrow 305c, and presses the switch right arrow 305b, the selection shown in FIG. 13 is made. A display screen 1300 for changing the data recording date and time is displayed.

  Here, when the switch up arrow 305a is pressed by the user, the year display 1301 is increased by one, and when the switch down arrow 305c is pressed, the year display 1301 is reduced by one and displayed. When the switch right arrow 305b is pressed, the year display 1301 is determined to the numerical value displayed at that time. Next, the user can specify increase or decrease of the numerical value of the month display 1302.

  Similarly, when the switch up arrow 305a is pressed, the month display 1302 is increased by one, and when the switch down arrow 305c is pressed, the month display 1302 is reduced by one and displayed. When the switch right arrow 305b is pressed, the month display 1302 is determined to the numerical value displayed at that time. Next, the user can specify increase or decrease of the numerical value of the date display 1303.

  When the switch left arrow 305d is pressed, the year display 1301 can be set again. By the same operation, the date display 1303, the morning and afternoon display 1304, the hour display 1305, and the minute display 1306 can be set. When the right arrow 305b of the switch is pressed after adjusting the numerical value of the minute display 1306, the change of the recording date and time is finished, and the date and time of the data is changed to the newly set numerical value.

  If a numerical value that is impossible on the calendar, such as February 30, is specified, the date is changed to the date closest to that date.

  In this embodiment, the user can freely delete the data. However, in order to prevent the data from being deleted by mistake, it is possible to give the data a deletion prohibition attribute. The state transition of this function is 111 in FIG.

  A procedure for attaching a deletion protection attribute to data will be described below. When the function switch 304 is pressed after the user selects data whose deletion attribute is to be changed on the display screen 700 using the switch up arrow 305a and the switch down arrow 305c, a display screen 900 is displayed. When the user selects “lock change” 906, which is a function for changing the display order, using the switch up arrow 305a and the switch down arrow 305c and presses the switch right arrow 305b, the selected data shown in FIG. A display screen 1400 for changing the deletion attribute of is displayed.

  When the user presses the switch right arrow 305b, the deletion attribute is cyclically changed in the order of “impossible → possible → impossible”. The protection mark 705 is displayed according to the deletion attribute.

  In the present embodiment, the user can know the remaining capacity of the HDD 415. The state transition of this function is 112 in FIG.

  Hereinafter, a procedure for confirming the remaining amount of the HDD 415 will be described. When the function switch 304 is pressed by the user on the display screen 700, the display screen 900 is displayed. When the user selects the "status display" 907, which is a function for changing the display order, using the switch up arrow 305a and the switch down arrow 305c and presses the switch right arrow 305b, the remaining capacity of the HDD 415 shown in FIG. Is displayed on the display screen 1500.

  The display screen 1500 includes a remaining time display 1501 when only MPEG1 moving image data with audio is recorded on the HDD 415, a remaining number display 1502 when only JPEG still image data is recorded, and a remaining time when only MPEG1 audio data is recorded. A display 1503 and a list of remaining capacity 1504 expressed by the number of bytes can be displayed. By displaying a list of the remaining amounts in units of each recordable data of the HDD, it becomes much easier for the user to grasp the remaining capacity.

  In the present embodiment, the operation at the time of data reproduction can be performed with only the switches 305a, 305d, 305c, and 305d, and the operation with the minimum necessary number of operation switches is possible. It is a target.

  In addition, by using the function selection screen 900, the number of functions can be increased without increasing the number of operation buttons.

  In the present embodiment, the number of data categories is four, including unclassified ones, but this number may be other. In the present embodiment, the data selection display screen 700 displays a list of each data regardless of the type of moving image, still image, or audio. Can be applied.

  Further, the control microcomputer 411 can automatically select and reproduce the data of each of the above-described recording data for each shooting mode such as a moving image and a still image. For example, the user can select a shooting mode for only a still image and extract and reproduce only the image format of the still image.

  As described above, the present invention can have the following configuration.

  (1) Conversion means for converting a video signal into a digital signal, a codec unit for selectively performing an MPEG or JPEG compression process on the digital signal to generate compressed data, and recording the compressed data. An image recording apparatus comprising: a recording unit; and a compression processing mode selection instruction unit for instructing selection of compression processing by the MPEG method or compression processing by the JPEG method.

  The image recording apparatus according to (1), wherein a compression processing method in the codec unit is switched according to an instruction from the selection instruction unit.

  The image recording apparatus according to (1), wherein a code indicating a compression processing method is added to the compressed data and recorded according to an instruction from the selection instruction unit.

  The image recording apparatus according to (1), wherein the codec unit is a circuit that performs processing of the MPEG system and processing of the JPEG system in common.

  The image recording device according to (1), wherein the video signal is a signal obtained from an image sensor.

  The image recording device according to (1), wherein the recording unit is a hard disk.

  (2) A recording unit for inputting and recording compressed data generated by performing a compression process in the MPEG system or the JPEG system, and a designation for designating data to be reproduced among compressed data recorded in the recording unit Means, reading means for retrieving and reading the compressed data designated by the designation means from the recording unit, and a digital signal is generated by selectively subjecting the compressed data to an MPEG or JPEG decompression process. An image reproducing apparatus, comprising: a codec unit; and a conversion unit that converts a digital signal generated by the codec unit into a video signal.

  The image reproducing apparatus according to the above (2), wherein a method of decompression processing in the codec unit is switched according to the compressed data read by the reading means.

  In the image reproducing apparatus of (2), a code indicating a compression processing method is added in advance to the compressed data of the recording unit, and the code of the compression processing added to the compressed data read by the reading unit is added. An image reproducing apparatus that switches a method of decompression processing in the codec unit according to a code indicating the method.

  In the image reproducing apparatus of the above (2), the codec section is a circuit that performs processing of the MPEG system and processing of the JPEG system in common.

  In the image reproducing device according to (2), the video signal is output to a built-in display device.

  In the image reproducing device of (2), the recording unit is a hard disk.

  (3) In an image recording / reproducing apparatus for converting a video signal into a digital signal for recording and converting the digital signal into a video signal and reproducing the same, at the time of recording, the MPEG signal or JPEG compression processing is selected for the digital signal. A codec unit that generates compressed digital data by performing compression processing to generate compressed data by selectively performing MPEG or JPEG decompression processing on the compressed data during reproduction; and a recording unit that records the compressed data. A compression processing mode selection instruction means for instructing whether to perform compression processing by the MPEG method or compression processing by the JPEG method, and to designate data to be reproduced among compressed data recorded in the recording unit. And reading means for retrieving and reading compressed data specified by the specifying means from the recording unit. Image recording and reproducing apparatus.

  In the image recording / reproducing apparatus of the above (3), at the time of recording, the compression processing method of the codec section is switched in accordance with an instruction from the selection instructing means, and at the time of reproduction, the compression read by the reading means is performed. An image recording / reproducing apparatus that switches a method of decompression processing in the codec section according to data.

  In the image recording / reproducing apparatus according to (3), at the time of recording, the recording unit records the compressed data by adding a code indicating a compression processing method to the compressed data in accordance with an instruction from the selection instruction unit. An image recording / reproducing apparatus for switching a decompression method in the codec unit according to a code indicating a compression method added to the compressed data read by the reading means.

  In the image recording / reproducing apparatus according to (3), the codec section is a circuit that performs processing of the MPEG system and processing of the JPEG system in common.

  In the image recording / reproducing apparatus according to the above (3), the video signal to be recorded is a signal obtained from an image sensor, and the video signal to be reproduced is output to a built-in display device.

  The image recording / reproducing apparatus according to (3), wherein the recording unit is a hard disk.

It is a state transition diagram of the software of the present invention. 1 is an external view of a portable digital video camera on which software of the present invention operates. It is an enlarged view of the operation switch part of the portable digital video camera on which the software of the present invention operates. 1 is a circuit block diagram of a portable digital video camera on which software of the present invention operates. FIG. 2 is a diagram illustrating a screen display configuration of a portable digital video camera on which software of the embodiment operates. 9 is a display screen for selecting a classification of recording data. 9 is a display screen for selecting recording data. 6 is a display screen with a reduced image for selecting recording data. 9 is a display screen for selecting a detailed function of recording data. 9 is a flowchart illustrating a method for selecting a detailed function. 9 is a display screen for changing the classification of recording data. 9 is a display screen for changing the display order of recording data. 9 is a display screen for changing a date of recording data. 9 is a display screen for changing a deletion attribute of recording data. 7 is a display screen for displaying a remaining amount state of a recording medium. 5 is a flowchart illustrating a method of reading recorded data from an HDD and reproducing the recorded data. 9 is a photographing screen when a still image recording mode is selected during recording. 5 is a shooting screen when a moving image recording mode is selected during recording. It is a mark figure according to mode.

Explanation of reference numerals

200 Portable Digital Camera Main Body 201 Liquid Crystal Display 202 Mode Selection Buttons 301 to 305 Operation Buttons including Play, Stop, Fast Forward, and Rewind Cross Buttons for Portable Digital Camera Device 411 Draw and Control Recorded Data List Display of the Present Invention Microcomputer 415 PC card type hard disk with a capacity of 260 Mbytes 605-607 Classification display mark 610 Operation guide display 701 Recorded data record date display 702 Recorded data record time display 703 Marker indicating shooting mode 705 Attribute mark indicating whether deletion is possible 801 Reduced image of recorded data 1701 Mark indicating still image mode 1801 Mark indicating moving image mode

Claims (18)

Moving image video signal recording / reproducing means converted into a digital signal, digital audio signal recording / reproducing means recorded in synchronization with the moving image, a still image video signal recording / reproducing means converted into a digital signal, the moving image signal and Display display means capable of displaying a still image video signal; and recording condition recording for recording recording conditions including data information of recording data for distinguishing the moving image and the still image and recording time information for recording video or audio. Means for recording and reproducing digital video and audio, comprising:
On the display screen of the display display means for displaying the video signal, a recording condition comprising at least the data information and the recording time information of the recording data is displayed in a graphic display or a character display,
A digital video / audio recording / reproducing apparatus, wherein the displayed recording data is selected on the display screen. Digital video signal recording / reproducing means, digital audio signal recording / reproducing means synchronously recorded with the video signal, still image video signal recording / reproducing means digitized, and synchronizing with the still image video A digital audio signal recording / reproducing means for recording the moving picture video signal and the still picture video signal, and a display means for displaying the moving picture video signal and the still picture video signal. Recording condition recording means for recording recording conditions including data information of recording data for distinguishing digital audio signals and recording time information for recording video or audio, and a digital video / audio recording / reproducing apparatus,
On the display screen of the display display means for display of the video signal, a recording condition comprising at least the data information and the recording time information of the recording data is displayed in a graphic display or a character display,
A digital video / audio recording / reproducing apparatus, wherein the displayed recording data is selected on the display screen. The digital video / audio recording / reproducing apparatus according to claim 1 or 2,
A digital video / audio recording / reproducing apparatus, characterized in that the recording condition of the recording data displayed on the display screen includes reduced screen information of the recording data. The digital video / audio recording / reproducing apparatus according to claim 1 or 2,
Moving image capturing means, still image capturing means, audio microphone, moving image digital converting means, still image digital converting processing means, audio digital converting means, and recording the moving image, still image and audio digital signal Recording means for recording and reproducing digital video and audio. The digital video / audio recording / reproducing apparatus according to claim 1 or 2,
A digital video / audio recording / reproducing apparatus, wherein the display means for displaying the recording conditions is a liquid crystal display panel having a width of 36.6 mm, a length of 27 mm, and a diagonal of 45.7 mm. The digital video / audio recording / reproducing apparatus according to claim 1 or 2,
A digital video and audio reproducing apparatus, wherein a recording start date and time and a recording start time are displayed as the recording time information on the recording condition display screen. The digital video / audio recording / reproducing apparatus according to claim 1 or 2,
On the display screen of the display means for displaying the video signal, the number of recorded data is displayed for at least two or more search categories, and a data storage area is provided for each of the categories to store the corresponding recorded data. A digital video / audio recording / reproducing apparatus characterized by storing in an area. The digital video / audio recording / reproducing apparatus according to claim 7,
A digital video / audio recording / reproducing apparatus characterized in that by selecting and operating one of the classifications on a display screen of the search classification, the classification is converted into a display screen of recording conditions displayed in graphic display or character display. The digital video / audio recording / reproducing apparatus according to claim 7,
A digital video / audio recording / reproducing apparatus characterized in that, when a recording destination is not specified when reproducing recorded data, the recorded data is displayed as being included in a predetermined classification destination at the top of the display screen. The digital video / audio recording / reproducing apparatus according to claim 1 or 2,
A digital video / audio recording / reproducing apparatus characterized in that information of an erasure prevention function which can be arbitrarily designated by a user is included in a recording condition of the recording data displayed on the display screen. The digital video / audio recording / reproducing apparatus according to claim 1 or 2,
A button for screen conversion from a display screen displaying the quantity of the recording data by search category to a display screen displaying recording conditions comprising the data information and recording time information, and recording on the display screen displaying the recording conditions. A button for selecting individual recording data from a list of data, a button for instructing an operation function of reproducing, stopping, fast-forwarding, and fast-returning the video of the digital video / audio recording / reproducing device; and And a button for returning to the display screen of the recording condition from the state described above. The digital video / audio recording / reproducing apparatus according to claim 1 or 2,
Digital video / audio recording wherein the recording conditions of the recording data are displayed at the top of the display screen in ascending order of recording time on a display screen for displaying graphics or characters, and data with old recording times are displayed at the bottom. Playback device. The digital video / audio recording / reproducing apparatus according to claim 3,
The reduced screen of the recording data displays a reduced image on the same line of the graphic display or character display of the recording condition, in which the number of pixels in each of the vertical and horizontal directions is reduced to 1/5 of the number of pixels obtained at the time of recording. Digital video / audio recording / reproducing apparatus characterized by the following. The digital video / audio recording / reproducing apparatus according to claim 7,
One of the storage areas is a data temporary discard area in which recorded data can be reproduced, and all data in the discard area can be collectively deleted by designating by a user. Video and audio recording and playback device. The digital video / audio recording / reproducing apparatus according to claim 12,
A digital video / audio recording / reproducing apparatus characterized in that the display order of the recording conditions of the recording data can be changed by designating by a user, and a specific recording condition is moved to an arbitrary line and displayed. The digital video / audio recording / reproducing apparatus according to claim 1 or 2,
On a display screen that graphically or character-displays the recording conditions of the recording data,
A function of moving the recording data to the temporary data discarding area, a function of deleting all data from the temporary data discarding area, a function of changing the classification for retrieving recording data, a function of changing the display order of recording conditions of recording data, and a function of recording data. A function including a function of changing the recording date and time, a function of changing the deletion attribute of the recording data, a function of displaying the remaining capacity of the storage capacity of the recording data, and a function including the function of displaying on the display screen,
A digital video / audio recording / reproducing apparatus, wherein any one of the displayed functions can be selected. In a digital video recording device that converts a video signal into a digital signal and records a video displayed on a display screen,
A compression unit that selectively performs a moving image or a still image compression process on the digital signal to generate compressed data;
A recording unit for recording the compressed data,
Recording mode selection instructing means for giving an instruction to select whether to compress and record a moving image or to compress and record a still image,
A moving image and a display indicating the type of a still image are displayed on the display screen in association with the selection by the recording mode selection instructing unit,
An image recording apparatus, wherein the compression unit selectively performs a compression process on a moving image or a still image in response to an instruction from the recording mode selection instruction unit in accordance with a display indicating a type of the moving image or the still image. A holding unit that holds compressed data generated by performing a compression process on a moving image or a still image,
A decompression unit for selectively performing a decompression process of a moving image or a still image on the compressed data to generate a digital signal,
A digital video playback device that converts the digital signal generated by the decompression unit into a video signal and reproduces a video on a display screen,
Designating means for designating data to be reproduced among the compressed data held in the holding unit;
Means for retrieving and reading the compressed data designated by the designation means from the holding unit,
Moving image, data information representing the type of still image is displayed on the display screen in association with the compressed data held by the holding unit,
The designation of the compressed data by the designation unit according to the data information representing the type of the moving image or the still image is performed, and the decompression unit selectively performs the decompression processing of the moving image or the still image according to the compressed data. Digital video playback device.

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