JP3524833B2 - Image playback device - Google Patents

Description

Detailed Description of the Invention

[0001]

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 of an arbitrary frame number from a recording medium on which a moving image composed of a plurality of still images is recorded.

[0002]

2. Description of the Related Art As a conventional image reproducing apparatus of this type,
Some still images were played back using the shuttle function or 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, and in the jog function,
Similarly, the still image was updated frame by frame by turning the dial key.

[0003]

However, the recording time of a moving image varies depending on the recording medium or the moving image file. Therefore, in order to grasp the rough contents of the moving image by using the shuttle function, it is necessary to turn the dial keys a lot as the recording time becomes longer. Further, in the jog function, the longer the recording time, the longer it took to find a desired still image.

Therefore, a main object of the present invention is to provide an image reproducing apparatus capable of grasping the rough contents of a moving image with the same labor regardless of the recording time of the moving image .

[0005]

Means for Solving the Problems] image reproduction according to this invention
The device is an image reproducing device for reproducing a still image of an arbitrary frame forming a moving image, a detecting means for detecting the total number of frames of the still image, a dividing means for dividing the total number of frames by a predetermined number, and a reproducing still image. A first updating means for inputting a first updating instruction, 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 the first updating instruction is inputted. You
It

[0006]

In accordance with the this invention, when reproducing a still image of an arbitrary frame forming the moving image, is detected total number of frames of still images by first detecting means, the total number of frames detected by the division means It is divided by a predetermined number.
When the first update instruction for the reproduced still image is input by the first input unit, the first update unit updates the reproduced still image for each frame number corresponding to the division value of the division unit.

The first updating means preferably includes a first adding means and a first reproducing means. The first adding means adds the division value to the current frame number each time the first update instruction is input once, and the first reproducing means adds the still image of the frame number corresponding to the added value by the first adding means. Reproduce. As a result, the reproduced still image is updated for each frame corresponding to the division value.

According to an embodiment of the present invention, when a second update instruction for a reproduced still image is input by the second input means, the input timing of the second update instruction of the previous time and the second update instruction of the present time are input.
The time difference of the input timing of the update instruction is measured by the measuring 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 the still image of the frame number corresponding to the added value by the second adding means. As a result, the reproduced still image is updated for each frame number related to the time difference. The second
The smaller the time difference, the larger the value added by the adding means should be.

In another embodiment of the present invention, the character associated with the current frame number is displayed by the character display means. The displayed characters are preferably strip-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 a plurality of frames .

[0012]

According to this invention, according to the present invention, since by dividing the total number of frames of still images forming a moving image by a predetermined number, and to update the reproduced still image for each frame number corresponding to the quotient, Even when the moving image recording time is long, it is possible to grasp the rough contents of the moving image with the same effort as when the recording time is short .

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 the front surface thereof. The light is received on the light receiving surface of the CCD imager 12 through the color filters.

The operator selects the shooting / playback changeover switch 60.
Is set to the “shooting” side, the system controller 62
Gives a corresponding status signal to the CPU 34. Then,
The CPU 34 commands the timing generator (TG) 14 to perform thinning-out reading, and the TG 14 drives the CCD imager 12 by the thinning-out reading method based on the vertical synchronizing signal and the horizontal synchronizing signal output from the signal generator (SG) 15. As a result, a low resolution camera signal (pixel signal) corresponding to the subject image is output from the CCD imager 12. The output camera signal is a CD
Well-known noise removal and level adjustment are performed in the S / AGC circuit 16, and then converted into a digital signal by the A / D converter 18.

The CPU 34 also gives a predetermined processing command to the signal processing circuit 20 and the video encoder 26. The signal processing circuit 20 performs processing such as color separation, white balance adjustment, and YUV conversion on the camera data provided through the A / D converter 18, and generates 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 written in the SDRAM 24 by the memory control circuit 22. 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, and converts the YUV data read by the memory control circuit 22 into an NTSC composite image signal. . The converted composite image signal is applied 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.

When the character signal is output from the character generator 38, the switch SW1 is connected to the character generator 38 at a predetermined timing. The character signal is mixed with the composite video signal by the switch SW1, and as a result, the corresponding character is OSD-displayed on the monitor 28.

When the operator presses the shutter button 48 once, the system controller 62 commands the CPU 34 to perform a recording process. Then, the CPU 34 gives a compression processing instruction to the JPEG codec 36, and the JPEG codec 3
6 responds to this compression instruction to the memory control circuit 22 by Y.
Request to read UV data. In response to the read request from the JPEG codec 36, the memory control circuit 22 reads the YUV data of consecutive frames, that is, the moving image data of the subject from the SDRAM 24, and gives it to the JPEG codec 36. The moving image data is 1 according to the JPEG method (QuickTime Photo-JPEG).
It is compressed frame by frame. When the compressed image data is generated, the JPEG codec 36 gives the compressed image data to the memory control circuit 22 together with the write request.
Therefore, the compressed image data forming the moving image is also SD
It is stored in the RAM 24.

The CPU 34 also gives a recording command to the disk controller 40. Disk controller 40
Responds to the recording command, requests the memory control circuit 22 to read the compressed image data, and captures the compressed image data read by the memory control circuit 22.
Then, the optical pickup 42 and the recording head 44 are driven to transfer the compressed image data to the AS-MO (Advanced Storage
The data is recorded on a removable magneto-optical disk 46 such as a Magneto Optical. As described above, after the shutter button 48 is pressed, the writing process of the compressed image data to the SDRAM 24 and the recording process of the compressed image data stored in the SDRAM 24 to the magneto-optical disk 46 are 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 makes the JPE
The output of the compression processing command to the G codec 36 is stopped, and the output of the recording command to the disk controller 40 is stopped when all the compressed image data of the SDRAM 24 are recorded on the magneto-optical disk 46.

As a result of the above recording process, a moving image file as shown in FIG. 2 is formed on the magneto-optical disk 46. This moving image file consists of a header and compressed image data for a plurality of frames. The header contains a file name, the total number of frames of still images forming the moving image,
Image management information such as the start address of the compressed image data of each frame and the frame rate of the moving image is stored. With this image management information, it is possible to easily access the compressed image data of an arbitrary frame.

A through image is displayed on the monitor 28 while the recording process is being performed, and this through image display is continuously performed even after the recording is completed.

The operator operates the photographing / reproduction changeover switch 60.
To the "playback" side, the system controller 6
2 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 OSD-displays the file names of a plurality of moving image files recorded on the magneto-optical disk 46 on the monitor 28, and the cursor key 52
A desired moving image file is selected according to the operation of the and set keys 50. Next, in step S3, the counter 34a
The count value i of is set to "1". Counter 34a
Is a counter for designating a frame number of a still image to be reproduced, and the first frame is designated first by the processing of step S3.

In a succeeding step S5, the i (= 1) th frame still image included in the desired moving image file is reproduced. Specifically, the disk controller 40, the JPEG codec 36, and the video encoder 26 are instructed to read the compressed image data of the frame number i, decompress the read compressed image data, and encode the decompressed image data, respectively. .

When the 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 stores the read compressed image data together with the write request in the memory. Output to the control circuit 22. The compressed image data is temporarily transferred to the SDR by the memory control circuit 22.
It is stored in the AM 24. The JPEG codec 36 requests the memory control circuit 22 to read the compressed image data in response to the decompression command, and applies the JPEG expansion to 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. Therefore, decompressed image data is also SDR
It is stored in the AM 24. The video encoder 26 requests the memory control circuit 22 to read decompressed image data, and performs an encoding process on the read decompressed image data. As a result, a still image of the first frame as shown in FIG. 7 is displayed on the monitor 28.

The CPU 34 subsequently determines in step S7 whether the set key 50 has been pressed. And YE
When the determination result of S is obtained, the counter 34a is incremented in step S9, and the still image of the i-th frame is reproduced in the same manner as described above in step S11. CP
The U34 then determines in step S13 whether the set key 50 has been pressed again, determines in step S15 whether the count value i has exceeded the total number of frames m of the desired moving image file, and the vertical synchronization from SG15 is performed. It is determined in step S17 whether a signal has been output.

When the set key 50 is pressed, the CPU 3
4 determines YES in step S13, and returns to step S7. Therefore, the still image of the current frame number (frame number corresponding to the current count value i) continues to be displayed on the monitor 28 unless any key operation is performed. If the count value i exceeds the total number of frames m, the CPU 34 determines YES in step S15, and returns to step S3.
Therefore, after the end frame is reproduced, the still image of the start frame is displayed on the monitor 28. If the vertical synchronizing signal is output, the CPU 34 returns Y in step S17.
It is determined to be ES, and the process 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 of frames m, still images of a series of frames are reproduced at a predetermined timing. That is, the moving image that moves at the normal speed is displayed on the monitor 28.

A vertical synchronizing signal is output from the SG 15 every 1/30 second, and the timing of determining YES in step S17 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 second, the vertical sync signal is 1
It is determined to be YES each time it is output, and if the frame rate information is 1/15 seconds, it is determined to be YES each time the vertical synchronization signal is output.

If NO is determined in step S7, C
The PU 34 determines whether or not the shuttle key 54 is pressed in step S19, and if the shuttle key 54 is pressed, it is considered that the shuttle mode is selected and the step S
Proceed to 21. In this step, the total number of frames m of the still images included in the desired moving image file is set to the predetermined number "28".
Then, the number n of moving frames in one step is obtained.
For example, when the total number of frames m is “8400”, the number of moving frames n is “300”. When the frame rate of the moving image file is 1/30 second, the recording time of the moving image is 280 seconds, and the moving width of one step is 10 seconds. When the frame rate of the moving image file is 1/15 second, the moving image recording time is 560 seconds, and the moving width of one step is 20 seconds. The total number of frames m is
It 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 to monitor the character 28 of the bar extending in the horizontal direction as shown in FIG.
OSD display. Here, the length of the shaded portion of the bar is related to the size 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 approximate to the size of the current count value i is selected from these 28 types. For example, the total frame m is "8400".
At this time, if the current count value i is "1300", the length of the shaded portion is 4/28.

Subsequently, the CPU 34 determines in step S25 whether or not the dial key 58 shown in FIG. 3 has been operated. The dial key 66 is, for example, a key that makes one turn in eight steps. In step S25, it is determined whether or not this key has been rotated counterclockwise. When the dial key 66 is rotated counterclockwise by one step, the process proceeds to step S27 to update the count value i. That is, the number of moving frames n 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 when the reproduction is completed, returns to step S23. In step S23, a bar having a length associated with the updated count value i is OSD-displayed on the monitor 28. Therefore, dial key 6
When the length of the shaded portion of the bar before 6 is operated is 4/28, the length of the shaded 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, every time the dial key 66 is moved in the counterclockwise direction by one step, the still image of the i-th frame displayed on the monitor 28 is updated by the still image of the (i + n) th frame. 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". Therefore, even when the total number of frames m is different 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 of 28 steps.
Therefore, regardless of the recording time of the moving image file, it is possible to grasp the general contents with the same effort. Also, the strip-shaped character associated with the current frame number i is O.
Since the SD display is performed, it is possible to easily recognize which part of the entire still image being reproduced is located.

If NO in steps S7 and S19, the CPU 34 determines in step S35 whether or not the jog key 56 is pressed. If YES, the CPU 34 executes the jog mode processing in steps S37 and thereafter. First, the timer 34b is started in step S37, and then step S39
The initial timer value held in the register 34c is initialized by. Subsequently, in step S41, the same processing as in step S23 described above is performed, and a strip-shaped character having a length related to the current count value i is OSD-displayed on the monitor 28.

In step S43, it is determined whether or not the dial key 58 has been operated, and when a YES result is obtained, that is, the dial key 58 is turned counterclockwise by 1
When rotated in steps, the process proceeds to step S45. CP
The U34 subsequently acquires the current timer value in step S45, and obtains the difference between the acquired current timer value and the previous timer value held in the register 34c in step S47. In step S49, the number of moving frames k is calculated based on the difference between the timer values obtained in step S47. The calculated moving frame number k has a larger value as the difference between the timer values is smaller.

Thereafter, the CPU 34 adds the calculated moving frame number k to the current count value i in step S51,
The still image of the frame corresponding to the updated count value i is reproduced in step S53, and the current timer value acquired in step S45 is stored in the register 34c in step S55. When the process of step S55 is completed, the CPU
34 returns to step S39 and repeats the above processing.

If the set key 50 is pressed during the jog mode operation, the CPU 34 returns Y in step S57.
It is determined to be ES, and the process returns to step S9. If the shuttle key 54 is pressed during the same jog mode operation, C
The PU 34 determines YES in step S59, and proceeds to step S21.

In the jog mode, the increment of the frame number updated by the second or subsequent operation of the dial key 58 is determined based on the difference (time difference) between the previous dial operation timing and the current dial operation timing.
That is, the shorter the difference, the larger the number of moving frames k.
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 dial key 58 is operated becomes large. In this way, the feed amount of the reproduced image fluctuates freely according to the rotation speed of the dial key 58 by the operator, so that a desired still image can be quickly searched for. Further, since the length of the strip-shaped character displayed in the OSD changes as the frame number i is updated, it is possible to easily recognize which part of the whole still image being reproduced is located.

Although the frame number is increased in response to the counterclockwise rotation of the dial key in this embodiment, the frame number is decreased when the dial key is rotated clockwise. If you make it
It is also possible to reproduce a still image in the reverse direction.

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 drawings]

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

FIG. 2 is an illustrative view showing a structure 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 FIG. 1 embodiment.

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

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 leading frame.

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

[Explanation 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

Claims (8)

(57) [Claims] 1. An image reproducing apparatus for reproducing a still image of an arbitrary frame forming a moving image, detecting means for detecting the 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 of the 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 division unit when the first updating instruction is input.
Image playback device. 2. The first updating means adds the divided value to the current frame number each time the first updating instruction is input once, and the addition value by the first adding means is added to the current frame number. First to play back still image with corresponding frame number
The image reproducing apparatus according to claim 1, further comprising reproducing means. 3. A second input means for inputting a second update instruction of a reproduced still image, the input timing of the second update instruction of the previous time when the second update instruction is input, and the second update instruction of the current time. The image reproducing apparatus according to claim 1, further comprising: a measuring unit that measures a time difference of input timing; and a second updating unit that updates the reproduced still image for each number of frames related to the time difference. 4. The second updating means reproduces a still image having a frame number corresponding to the value added by the second adding means for adding a numerical value relating to the time difference to the current frame number, and the second adding means. The image reproducing apparatus according to claim 3, further comprising a second reproducing unit. 5. The image reproducing apparatus according to claim 4, wherein the second adding means increases the numerical value to be added to the current frame number as the time difference is 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 the character is a band-shaped character whose length is related to the size of the current frame number. 8. The still image of the plurality of frames is 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. Image playback device.