JP2001197449A - Image reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recognize rough contents of an entire moving image file with the same amount of labor, independently of the total number of frames in the file. SOLUTION: When a shuttle key 54 is depressed in the middle of reproducing of an arbitrary still image included in a moving image file, a shuttle mode is set. In the shuttle mode, a dial key 58 is validated, and a reproduced still image is updated in response to operator's operation of the dial key 58. In this case, the number of moved frames, which is obtained by rotating the dial key 58 by one step, corresponds to a value obtained by dividing the total number of frames of still images included in the moving image file by a prescribed number '28'. Therefore, the number of moved frames for one step is 300, if the total number of frames is 8,400. For each 300-th still image of still images included in the moving, image file are reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reproducing apparatus and, more particularly, to an image reproducing apparatus for reproducing a still image having an arbitrary frame number from a recording medium on which a moving image composed of a plurality of frames of still images is recorded.

2. Description of the Related Art As a conventional image reproducing apparatus of this type,
Some still images were reproduced by a shuttle function or a jog function. In the shuttle function, the still image is updated every predetermined number of frames (for example, every 100 frames) by turning the dial key. In the jog function,
Similarly, turning the dial key updates the still image frame by frame.

However, the recording time of a moving image varies depending on a recording medium or a moving image file. Therefore, when trying to grasp the rough contents of a moving image using the shuttle function, it is necessary to rotate the dial key more as the recording time is longer. In the jog function, the longer the recording time, the longer it takes to find a desired still image. Therefore, the main object of the present invention is, regardless of the recording time of a moving image,
An object of the present invention is to provide an image reproducing apparatus capable of grasping a rough content of a moving image with the same effort. Another object of the present invention is to provide an image reproducing apparatus capable of quickly searching for a desired still image.

According to a first aspect of the present invention, there is provided an image reproducing apparatus for reproducing a still image of an arbitrary frame forming a moving image, a detecting means for detecting a total number of frames of the still image, and a detecting means for detecting the total number of frames. Division means for dividing by a predetermined number,
First input means for inputting a first update instruction for a reproduced still image,
And a first updating means for updating the reproduced still image for each frame number corresponding to the division value of the dividing means when a first updating instruction is input. It is. According to a second aspect of the present invention, in an image reproducing apparatus for reproducing a still image of an arbitrary frame forming a moving image, input means for inputting an update instruction of a reproduced still image, and input of a previous update instruction when the update instruction is input An image reproducing apparatus comprising: a measuring unit that measures a time difference between a timing and an input timing of a current update instruction; and an updating unit that updates a reproduced still image for each number of frames related to the time difference.

According to the first aspect of the invention, when reproducing a still image of an arbitrary frame forming a moving image, first, the detecting means detects the total number of frames of the still image, and the detected total number of frames is divided by the dividing means. Is divided by a predetermined number. When a first update instruction for a reproduced still image is input by the first input unit, the first updating unit updates the reproduced still image for each frame number corresponding to the division value of the dividing unit.
The first updating means preferably includes a first adding means and a first adding means.
Including playback means. The first adding means adds the divided value to the current frame number every time the first update instruction is input, and the first reproducing means adds a still image of a frame number corresponding to the added value by the first adding means. Reproduce. Thus, the reproduced still image is updated for each frame corresponding to the divided value. In one embodiment of the present invention, when a second update instruction for a reproduced still image is input by the second input means, a time difference between the input timing of the previous second update instruction and the input timing of the current second update instruction is measured. Measured by means.
The second updating means updates the reproduced still image for each frame number related to the measured time difference. The second updating means preferably includes a second adding means and a second reproducing means. The second adding means adds a numerical value related to the time difference to the current frame number, and the second reproducing means reproduces a still image of a frame number corresponding to the added value by the second adding means. Thus, the reproduced still image is updated for each frame number related to the time difference. It is preferable that the numerical value added by the second adding means increases as the time difference becomes shorter. In another embodiment of the present invention, a character associated with the current frame number is displayed by the character display means. The displayed characters are preferably band-shaped characters whose length is related to the size of the current frame number. In another embodiment of the present invention, still images of a plurality of frames are stored in one moving image file, and the moving image file has total frame number information of the still images of the plurality of frames. According to the second invention, when an instruction to update a reproduced still image is input by the input unit, the time difference between the input timing of the previous update instruction and the input timing of the current update instruction is measured by the measurement unit. The updating means updates the reproduced still image for each frame number related to the measured time difference. As a result, a still image of an arbitrary frame is reproduced.

According to the first aspect, the total number of still images forming a moving image is divided by a predetermined number, and the reproduced still image is updated for each number of frames corresponding to the divided value. Even when the recording time of the moving image is long, the rough contents of the moving image can be grasped with the same effort as when the recording time is short. According to the second aspect, the time difference between the input timing of the previous update instruction and the input timing of the current update instruction is measured, and the reproduced still image is updated for each frame number related to the measured time difference. The feed amount of the still image varies according to the operator's intention. Therefore, a desired still image can be quickly searched for in response to the operation of the operator. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

Referring to FIG. 1, a digital camera 10 of this embodiment includes a CCD imager (image sensor) 12 having a color filter (not shown) mounted on a front surface thereof. The light is irradiated on the light receiving surface of the CCD imager 12 through the color filter. When the operator sets the shooting / playback switch 60 to the “shooting” side, the system controller 62 gives a corresponding status signal to the CPU 34. Then, the CPU 34 instructs the timing generator (TG) 14 to perform thinning-out reading, and the TG 14 drives the CCD imager 12 in a thinning-out reading mode based on the vertical synchronization signal and the horizontal synchronization signal output from the signal generator (SG) 15. . by this,
Low-resolution camera signal (pixel signal) corresponding to the subject image
Is output from the CCD imager 12. The output camera signal is subjected to well-known noise removal and level adjustment by the CDS / AGC circuit 16, and then the A / D converter 1
8 is converted into a digital signal. CPU34
Gives a predetermined processing instruction to the signal processing circuit 20 and the video encoder 26 as well. The signal processing circuit 20
The camera data supplied through the / D converter 18 is subjected to processing such as color separation, white balance adjustment, and YUV conversion, to generate YUV data corresponding to the subject image. Then, the generated YUV data is output to the memory control circuit 22 together with the write request. The YUV data output from the signal processing circuit 20 is sent to the memory control circuit 22 by the SUV.
The data is written to the DRAM 24. On the other hand, the video encoder 26 requests the memory control circuit 22 to read the YUV data in response to the processing command from the CPU 34,
The YUV data read by the memory control circuit 22 is converted into an NTSC composite image signal. The converted composite image signal is provided to the monitor 28 through the switch SW1, and as a result, a real-time moving image (through image) of the subject is displayed on the monitor 28. The switch SW1 is connected to the character generator 38 at a predetermined timing when a character signal is output from the character generator 38. The character signal is mixed with the composite video signal by the switch SW1, and as a result, the corresponding character is displayed on the monitor 28 by OSD. When the operator presses the shutter button 48 once, the system controller 62
A recording process is instructed to the PU. Then, the CPU 34 gives a compression processing instruction to the JPEG codec 36 and the JPE codec 36
The G codec 36 requests the memory control circuit 22 to read the YUV data in response to the compression command. The memory control circuit 22 reads YUV data of a continuous frame, that is, moving image data of a subject, from the SDRAM 24 in response to a read request from the JPEG codec 36, and supplies the read YUV data to the JPEG codec 36.
The moving image data is in JPEG format (QuickTime Photo-JPE
Each frame is compressed according to G). When the compressed image data is generated, the JPEG codec 36 supplies the compressed image data to the memory control circuit 22 together with a write request. Therefore, compressed image data forming a moving image is also stored in the SDRAM 24. The CPU 34 also gives a recording command to the disk controller 40.
The disk controller 40 requests the memory control circuit 22 to read compressed image data in response to the recording command, and takes in the compressed image data read by the memory control circuit 22. Then, the optical pickup 42
And the recording head 44 to drive the compressed image data to AS
Recording on a removable magneto-optical disk 46 such as an MO (Advanced Storage Magneto Optical). As described above, after the shutter button 48 is pressed, the processing of writing the compressed image data to the SDRAM 24 and the processing of the SDRA
Magneto-optical disk 4 of compressed image data stored in M24
6 is performed in parallel. When the operator operates the shutter button 48 again, the system controller 62 instructs the CPU 34 to stop the recording process. Then, the CPU 34 stops outputting the compression processing command to the JPEG codec 36, and stops outputting the recording command to the disk controller 40 when all the compressed image data of the SDRAM 24 is recorded on the magneto-optical disk 46. . As a result of the recording processing as described above, a moving image file as shown in FIG. 2 is formed on the magneto-optical disk 46. The moving image file includes a header and compressed image data for a plurality of frames. The header includes a file name, the total number of still images forming a moving image, the start address of the compressed image data of each frame, and the moving image. Image management information such as a frame rate is stored. With this image management information, compressed image data of an arbitrary frame can be easily accessed. It should be noted that a through image is displayed on the monitor 28 even while the recording process is being performed, and this through image display is continuously performed even after the recording is completed. When the operator switches the shooting / playback switch 60 to the “playback” side, the system controller 62 gives a corresponding status signal to the CPU 34. Then, the CPU 34 reproduces a desired moving image file according to the flowcharts shown in FIGS. First, in step S1, the CPU 34 displays the file names of a plurality of moving image files recorded on the magneto-optical disk 46 by OSD on the monitor 28, and selects a desired moving image file according to the operation of the cursor key 52 and the set key 50. Next, in step S3, the count value i of the counter 34a is set to "1". The counter 34a is a counter for designating the frame number of the still image to be reproduced, and the first frame is first designated by the processing of step S3. In the following step S5, i (=
1) The still image of the frame is reproduced. Specifically, reading of the compressed image data of frame number i, decompression processing of the read compressed image data, and encoding processing of the decompressed image data are performed by the disk controller 40 and the JPEG.
It instructs the codec 36 and the video encoder 26, respectively. When a read command is given, the disk controller 40 reads the compressed image data of the first frame based on the image management information stored in the desired moving image file, and writes the read compressed image data together with the write request to the memory control circuit 22. Output to The compressed image data is temporarily stored in the SDR by the memory control circuit 22.
Stored in AM24. The JPEG codec 36 requests the memory control circuit 22 to read compressed image data in response to the decompression command, and performs JPEG decompression on the compressed image data read from the SDRAM 24. When the decompressed image data is generated, the JPEG codec 36 requests the memory control circuit 22 to write the decompressed image data. For this reason, the decompressed image data is
Stored in AM24. The video encoder 26 requests the memory control circuit 22 to read out the decompressed image data, and performs an encoding process on the read out decompressed image data. As a result, for example, a still image of the first frame as shown in FIG. Next, the CPU 34 determines whether or not the set key 50 has been pressed in step S.
Judge at 7. Then, when a determination result of YES is obtained, the counter 34a is incremented in step S9, and the still image of the i-th frame is reproduced in step S11 in the same manner as described above. Thereafter, the CPU 34 determines whether or not the set key 50 is pressed again in step S13, determines in step S15 whether or not the count value i exceeds the total number m of frames of the desired moving image file. It is determined in step S17 whether a signal has been output. If the set key 50 has been pressed, the CPU 34 determines YES in step S13 and returns to step S7. Therefore, as long as no key operation is performed, the still image of the current frame number (the frame number corresponding to the current count value i) is continuously displayed on the monitor 28. If the count value i exceeds the total number of frames m, the CP
U34 determines YES in step S15, and proceeds to step S15.
Return to 3. Therefore, after the last frame is reproduced, the still image of the first frame is displayed on the monitor 28. If the vertical synchronization signal has been output, the CPU 34 determines YES in step S17, and returns to step S9. Therefore, as long as the set key 50 is not pressed and the count value i does not exceed the total number m of frames, still images of a series of frames are reproduced at a predetermined timing. That is, a moving image moving at a normal speed is displayed on the monitor 28. Note that SG15
, A vertical synchronizing signal is output every 1/30 second. In step S17, the timing for determining YES is switched according to the frame rate information stored in the header of the moving image file. That is, if the frame rate information is 1/30 seconds, YES is determined each time the vertical synchronization signal is output once, and if the frame rate information is 1/15 seconds, every time the vertical synchronization signal is output once. Is determined as YES. If NO is determined in the step S7, the CPU 34 determines whether or not the shuttle key 54 is pressed in a step S19. If the shuttle key 54 is pressed, the CPU 34 determines that the shuttle mode is selected and proceeds to the step S21. In this step, the total number m of still images included in a desired moving image file is divided by a predetermined number “28” to obtain the number n of moving frames in one step. For example, when the total number of frames m is “8400”, the number of moving frames n is “30”.
0 ". The frame rate of the moving image file is 1/3
In the case of 0 second, the recording time of the moving image is 280 seconds,
The movement width of one step is 10 seconds. When the frame rate of the moving image file is 1/15 second, the recording time of the moving image is 560 seconds, and the moving width of one step is 20 seconds. The total number of frames m is detected based on the image management information stored in the header of the moving image file. In a succeeding step S23, the character generator 38 and the switch SW1 are controlled, and a character of a bar extending in the horizontal direction as shown in FIG. Here, the length of the shaded portion of the bar is related to the magnitude of the current count value i. That is, if the current count value i is large, the shaded portion of the bar becomes long, and if the current count value is small, the shaded portion of the bar becomes short. However, the length of the shaded portion is 28 types corresponding to the above-mentioned predetermined number, and the length approximating the size of the current count value i is selected from the 28 types.
For example, if the current count value i is “1300” when the total frame m is “8400”, the length of the hatched portion is 4 /
28. Subsequently, the CPU 34 determines whether or not the dial key 58 shown in FIG. 3 has been operated in step S25. The dial key 66 is a key which makes one round in eight steps, for example. In step S25, it is determined whether or not this key has been rotated counterclockwise. When the dial key 66 is rotated one step in the counterclockwise direction, the process proceeds to step S27, and the count value i is updated. That is, the number n of moving frames is added to the current count value i. C
After that, the PU 34 reproduces the still image of the frame corresponding to the updated count value i in step S29, and upon completion of the reproduction, returns to step S23. In step S23, a bar having a length related to the updated count value i is displayed on the monitor 28 by OSD. Therefore, dial key 6
When the length of the hatched portion of the bar before the operation of the button 6 is 4/28, the length of the hatched portion extends to 5/28 in response to the operation of the dial key 66. If the set key 50 is pressed during the shuttle mode operation, the CPU 34 determines YES in step S31 and returns to step S9. If the jog key 56 is pressed during the same shuttle mode operation, the CPU 34 determines YES in step S33, and proceeds to step S37. As described above, in the shuttle mode, the still image is updated every n frames in response to the operation of the dial key 66. That is, each time the dial key 66 is moved one step in the counterclockwise direction,
The i-th frame still image displayed on the monitor 28 is updated with the (i + n) -th frame still image.
Here, the number n of moving frames in one step is a value obtained by dividing the total number m of frames by a predetermined number “28”. For this reason,
Even when the total number of frames m differs for each moving image file, 28 still images distributed from the beginning to the end of the moving image file are reproduced by the dial operation in 28 steps. For this reason, regardless of the recording time of the moving image file, it is possible to grasp the overall rough contents with the same effort. Further, since the band-shaped character related to the current frame number i is displayed by OSD, it is possible to easily recognize where the reproduced still image is located in the whole. If NO is determined in steps S7 and S19, the CPU 34 determines in step S35 that the jog key 5
It is determined whether or not 6 has been pressed. If YES, jog mode processing is performed in step S37 and subsequent steps. First, the timer 34b is started in step S37, and the previous timer value held in the register 34c is initialized in step S39.
Subsequently, in step S41, the same processing as in step S23 described above is performed, and a band-shaped character having a length related to the current count value i is displayed on the monitor 28 by OSD. Step S
At 43, it is determined whether or not the dial key 58 has been operated. When the determination result of YES is obtained, that is, when the dial key 58 is rotated one step in the counterclockwise direction, the process proceeds to step S45. Subsequently, the CPU 34 obtains the current timer value in step S45, and obtains the difference between the obtained current timer value and the previous timer value held in the register 34c in step S47. In step S49, the number k of moving frames is calculated based on the difference between the timer values obtained in step S47. The calculated number k of moving frames is
The smaller the difference between the timer values, the larger the value. CPU3
4 then calculates the calculated number k of moving frames in step S
At 51, the still image of the frame corresponding to the updated count value i is added to the current count value i, the still image of the frame corresponding to the updated count value i is reproduced at step S53, and the current timer value acquired at step S45 is stored in the register 34c at step S55. Step S
Upon completion of the process in S55, the CPU 34 proceeds to step S39.
And the above processing is repeated. If the set key 50 is pressed during the jog mode operation, the CPU 34 determines YES in step S57 and returns to step S9. If the shuttle key 54 is pressed during the same jog mode operation, the CPU 34 determines in step S59 that YE
S is determined, and the process proceeds to step S21. In the jog mode, the increment of the frame number updated by the operation of the dial key 58 after the second time is determined based on the difference (time difference) between the previous dial operation timing and the current dial operation timing. In other words, the shorter the difference is, the larger the number k of moving frames is calculated, and the interval between the frame number of the current still image and the frame number of the still image displayed after the operation of the dial key 58 is increased. As described above, since the feed amount of the reproduced image fluctuates freely depending on the rotation speed of the dial key 58 by the operator, a desired still image can be quickly searched. OS
D The length of the displayed band character is frame number i
, It is possible to easily recognize where the reproduced still image is located. In this embodiment, the frame number is increased in response to the rotation of the dial key in the counterclockwise direction. However, the frame number is decreased when the dial key is rotated in the clockwise direction. Then, the reproduction of the still image in the reverse direction becomes possible. In this embodiment, a magneto-optical disk is used as a recording medium for recording a plurality of moving image files, but the recording medium may be a semiconductor memory.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is an illustrative view showing a configuration of a moving image file;

FIG. 3 is an illustrative view showing a dial key;

FIG. 4 is a flowchart showing a part of the operation of the embodiment in FIG. 1;

FIG. 5 is a flowchart showing another portion of the operation of the embodiment in FIG. 1;

FIG. 6 is a flowchart showing another portion of the operation of the embodiment in FIG. 1;

FIG. 7 is an illustrative view showing one example of a still image of a first frame;

FIG. 8 is an illustrative view showing one example of an image displayed on a monitor when a shuttle mode or a jog mode is selected;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Digital camera 12 ... CCD imager 22 ... Memory control circuit 24 ... SDRAM 26 ... Video encoder 28 ... Monitor 34 ... CPU 54 ... Shuttle key 56 ... Jog key

Continued on the front page F term (reference) 5C022 AB00 AB20 AB64 AC03 AC13 AC32 AC42 AC69 AC80 5C052 AA03 AA17 AB03 AC03 AC04 AC08 CC11 CC20 DD08 EE02 EE03 EE05 5C053 FA06 FA23 FA27 GB06 GB08 GB21 GB36 HA22 HA24 HA25 HA29 HA33 JA40 JA16 KA08 KA20 KA22 KA24 LA01 LA04 LA06 LA07

Claims (9)

[Claims] An image reproducing apparatus for reproducing a still image of an arbitrary frame forming a moving image, detecting means for detecting a total number of frames of the still image, dividing means for dividing the total number of frames by a predetermined number, First input means for inputting a first update instruction for a reproduced still image,
And a first updating unit that updates the reproduced still image for each frame number corresponding to the division value of the dividing unit when the first updating instruction is input,
Image playback device. 2. The apparatus according to claim 1, wherein said first updating means includes a first adding means for adding said divided value to a current frame number each time said first updating instruction is input once, 1st playback of the still image of the corresponding frame number
The image reproducing device according to claim 1, further comprising a reproducing unit. 3. A second input means for inputting a second update instruction of a reproduced still image, wherein when the second update instruction is input, a previous input timing of the second update instruction and a current input timing of the second update instruction. The image reproducing apparatus according to claim 1, further comprising: a measuring unit configured to measure a time difference between input timings; and a second updating unit configured to update the reproduced still image for each number of frames related to the time difference. 4. The second updating means for adding a numerical value relating to the time difference to a current frame number, and reproducing a still image of a frame number corresponding to the added value by the second adding means. The image reproducing device according to claim 3, further comprising a second reproducing unit. 5. The image reproducing apparatus according to claim 4, wherein said second adding means increases said numerical value to be added to said current frame number as said time difference becomes shorter. 6. The image reproducing apparatus according to claim 1, further comprising character display means for displaying a character associated with the current frame number. 7. The image reproducing apparatus according to claim 6, wherein said character is a band-shaped character whose length is related to the size of said current frame number. 8. A still image according to claim 1, wherein said plurality of frames of still images are stored in one moving image file, and said moving image file has information on a total number of frames of said plurality of frames of still images. Image playback device. 9. An image reproducing apparatus for reproducing a still image of an arbitrary frame forming a moving image, an input means for inputting an update instruction for a reproduced still image, and An image reproducing apparatus, comprising: a measuring unit that measures a time difference between an input timing and a current input timing of the update instruction; and an updating unit that updates the reproduced still image for each frame number related to the time difference.