JP3481162B2 - Digital camera and video 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 a digital camera, and more particularly, to a digital camera for photographing a subject image in response to a photographing instruction and recording a moving image signal composed of a plurality of still image signals on a recording medium.

The present invention also relates to a moving image reproducing apparatus,
In particular, it relates to a moving image reproducing apparatus which is applied to a digital camera and reproduces a moving image signal from a recording medium in response to a reproduction instruction.

[0003]

2. Description of the Related Art In a conventional digital camera of this type,
When the normal playback mode is set, the compressed still image signal of each frame is expanded in response to the vertical sync signal, and when the high speed playback mode is set, after the expansion processing of the compressed still image signal of the previous frame is completed. The compressed still image signal of the current frame was promptly expanded. As a result, in both normal reproduction and high-speed reproduction, compressed still image signals of all frames are expanded, and moving images composed of expanded still images of all frames are reproduced on a monitor at a desired speed.

[0004]

However, the expansion speed of the still image signal depends on the processing capacity of the expansion circuit. For this reason, in the conventional technique for reproducing the still image signals of all frames, the reproduction speed is limited. On the other hand, if the so-called frame skipping is performed during high-speed reproduction, the reproduction speed can be improved, but then the desired still image cannot be accessed.

Therefore, a main object of the present invention is to provide a digital camera or a moving image reproducing apparatus capable of reproducing still image signals of all frames at a higher speed.

[0006]

DISCLOSURE OF THE INVENTION A digit according to the first invention
Tarukamera is, of the subject when receiving a video shooting instruction
First signal generating means for generating a plurality of main still image signals forming a moving image, second signal generating means for generating a plurality of reduced still image signals respectively corresponding to the plurality of main still image signals, A main image file containing multiple main still image signals
Bei <br/> Ru give a second creating means for creating a reduced image file including first creating means to create, and a plurality of reduced still image signal.

The moving image reproducing apparatus according to the second invention is mainly
Multiple images stored in an image file and forming a moving image
The first reproducing means for reproducing the main still image signal, the reduced image frame
It is stored in a file and contains multiple primary still image signals.
A second replay for reproducing a plurality of reduced still image signals corresponding to each
Live means, the first reproducing means when a reproduction instruction is received, and
Activating means for activating one of the second reproducing means, and
The playback means activated by the activating means responds to the switching instruction.
A switching means for responding and switching is provided.

[0008]

According to the first aspect of the invention, when the moving image shooting instruction is received , the plurality of main still image signals forming the moving image of the subject are generated by the first signal generating means. Also, a plurality of reduced still image signals respectively corresponding to the plurality of main still image signals are generated by the second signal generating means. First generating means, the main comprising a plurality of main still image signals
The required image file is created , and the second creating means creates a reduced image file including a plurality of reduced still image signals.

Preferably, the first creating means has a plurality of main parts.
Main image for main management information to manage still image signals individually
Write to file, second create means multiple reduced stills
Reduced management information for individually managing image signals is displayed in the reduced image file.
Write on the file.

Preferably, the first creating means is a main image file.
File in the recording medium, and the second creating means creates a reduced image file.
Create a file in the recording medium. Here, the main management information is the recording of each main still image signal on the recording medium.
It includes primary address information indicating the position, reduction management information serial
Recording position of each reduced still image signal on recording medium
Is included in the reduced address information.

[0011]

[0012]

Preferably, the first reproducing means reproduces a plurality of main still image signals from the main image file on the basis of the main management information, and the second reproducing means compresses on the basis of the reduction management information.
Reproduce a plurality of reduced still image signals from a small image file . Capacity if means activated one of the first reproducing means and the second reproducing means when receiving a reproduction instruction. However,
The regeneration means activated by the activation means is a switching instruction.
Is switched by the switching means in response to.

A first reproducing means, the main still image signals of their respective play in response to a timing signal. Meanwhile, the second
Reproducing means, again continuously respective reduced still image signal
To live . The reproduced reduced still image signal is subjected to zoom enlargement processing by the zoom enlargement means.

[0015]

According to the second invention, the first reproducing means is the main element.
The plurality of main still image signals stored in the image file and forming the moving image are reproduced, and the second reproduction means reproduces the reduced image file.
It is stored in a file and contains multiple primary still image signals.
A plurality of corresponding reduced still image signals are reproduced . Capacity if means activated one of the first reproducing means and the second reproducing means when receiving a reproduction instruction. However, the activation hand
The regeneration means activated by the stage responds to the switching instruction.
Are switched by the switching means.

[0017]

Effect of the Invention According to the first invention, can play a reduced still image signals of all the hands at a high speed.

According to the second invention, since a plurality of main still image signals and the plurality of reduced still picture signal is reproduced in the selection択的based on playback instruction Oyo fine switching <br/> conversion instruction, All still images can be played at any playback speed.

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

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1, a digital camera 10 of this embodiment includes a CCD imager 12. A color filter (not shown) is mounted on the entire surface of the CCD imager 12, and the light image of the subject is applied to the CCD imager 12 through this color filter.

When the mode selector switch 54 is switched to the "camera" side, the system controller 46 sets the camera mode. Timing generator (TG) 14
Generates a timing signal based on the vertical synchronizing signal and the horizontal synchronizing signal output from the signal generator (SG) 16, and drives the CCD imager 12 by the progressive scan method. As a result, the camera signal of the subject is output from the CCD imager 12. The output camera signal is subjected to well-known noise removal and level adjustment in the CDS / AGC circuit 18, and then converted into camera data which is a digital signal by the A / D converter 20. The signal processing circuit 22 performs YUV conversion on the camera data output from the A / D converter 20 to generate YUV data (primary YUV data).

The primary YUV data generated by the signal processing circuit 22 is given to the memory control circuit 30 via the switch SW1 and the buffer 26. The memory control circuit 30 writes the given primary YUV data in the memory area 32a of the SDRAM 32. The memory area 32a has two banks and a thumbnail area as shown in FIG. 2A, and the primary YUV data of each frame is written in the banks A and B alternately.

The primary YUV data generated by the signal processing circuit 22 is also supplied to the thinning circuit 24. The thinning circuit 24 thins the input primary YUV data to generate thumbnail YUV data for 80 pixels × 60 lines. Switch SW1
Is the primary YUV output from the signal processing circuit 22.
It is connected to the thinning circuit 24 side during the horizontal blanking period of data. The thinning circuit 24 outputs the thumbnail YUV data for one line during this horizontal blanking period and supplies it to the memory control circuit 30 via the switch SW1 and the buffer 26. The memory control circuit 30 writes such thumbnail YUV data in the thumbnail area shown in FIG.

When a request is given from the video encoder 42 to the memory control circuit 30, the memory control circuit 30 reads the primary YUV data from the bank A or B. In other words, when writing is being performed on bank A, bank B is used. When writing is being performed on bank B, bank A is used to set the primary Y
Read UV data. The video encoder 42 generates an NTSC format composite video signal based on the primary YUV data read in this way, and inputs the generated composite video signal to the monitor 44. As a result, a real-time moving image (through image) of the subject is displayed on the monitor 44.

When the through image is displayed, the thumbnail area is not read out, and the thumbnail YUV data stored in the thumbnail area is updated every frame.

When the operator operates the shutter button 52, a moving image of the subject is recorded in the memory card 40. Specifically, the operator presses the shutter button 52
When pressed twice, the CPU 36 gives a compression instruction to the JPEG codec 34. Accordingly, the JPEG codec 34
Outputs a read request of the primary YUV data to the memory control circuit 30, and J to the primary YUV data read by the memory control circuit 30.
Apply PEG compression. The memory control circuit 30 reads the primary YUV data of the current frame in response to the read request and supplies it to the JPEG codec 34. The primary YUV data of the current frame is compressed by the JPEG codec 34, whereby primary compressed data for one frame is generated. The JPEG codec 34 gives the primary compressed data thus generated to the memory control circuit 30 together with the write request. The primary compressed data is stored in the memory area 32b shown in FIG. 2B by the memory control circuit 30.

The JPEG codec 34 then requests the memory control circuit 30 to read the thumbnail YUV data. The memory control circuit 30 reads the thumbnail YUV data of the current frame in response to the request, and
It is given to the PEG codec 30. The thumbnail YUV data of the current frame is compressed by the JPEG CODEC 30, and thumbnail compressed data for one frame is thereby generated. When the compression is completed, the JPEG codec 34 gives the generated thumbnail compressed data to the memory control circuit 30 together with the write request. The thumbnail compressed data is also stored in the memory area 32b shown in FIG. 2B by the memory control circuit 30.

Unless the shutter button 52 is pressed again by the operator, the CPU 36 repeatedly gives a compression command to the JPEG codec 34. Therefore, the primary compressed data and thumbnail compressed data of each frame are written alternately in the memory area 32b.

When the shutter button 52 is pressed, the CPU
36 stops outputting the compression instruction. The CPU 36 also
The memory control circuit 30 is requested to read the primary compressed data stored in the memory area 32b. The memory control circuit 30 sequentially reads the primary compressed data from the memory area 32b in response to this request,
It is given to the CPU 36. The read primary compressed data is sequentially recorded in the memory card 40 via the interface (I / F) circuit 38. When the recording of the primary compressed data of the last frame is completed, the CPU 36 records the primary index data for managing the primary compressed data of each frame. As a result, a primary file containing the primary compressed data and the primary index data is formed on the memory card 40.

The CPU 36 subsequently requests the memory control circuit 30 to read the thumbnail compressed data, and records the thumbnail compressed data sequentially read by the memory control circuit 30 in the memory card 40. Also at this time, after the thumbnail compressed data of the last frame is recorded, the thumbnail index data for managing the thumbnail compressed data of each frame is recorded. As a result, a thumbnail file containing the thumbnail compressed data and the thumbnail index data is formed in the memory card 40.

Both the primary file and the thumbnail file have a data structure as shown in FIG. That is, the identifier "data" indicating the compressed data and the data length of the compressed data are written at the head, and then the compressed data of each frame is written. Subsequently, the identifier “index” indicating the index data, the data length of the index data, and the index data are sequentially written. The index data has start address information and size information of the compressed data of each frame in the memory card 40. As a result, the compressed data is managed frame by frame.

The CPU 36 operates as shown in FIG.
And process the flow diagram shown in FIG. When the camera mode is set by the mode selector switch 54, first, in step S11, the frame number n and the write address mov_adr of compressed data are initialized. That is, the frame number n is 0
And mov_adr is set to the start address start_adr shown in FIG. 2 (B). In the following step S13,
It is determined whether or not the shutter button 52 has been pressed. If “NO” in the step S13, the shutter button 52
It is determined that is not pressed, and the process returns to step S13.
If "YES", it is determined that the shutter button 52 has been pressed, and it is determined in step S15 whether the vertical synchronizing signal has been input. When the vertical synchronizing signal is input, the process proceeds from step S15 to step S17.

In step S17, the JPEG codec 34 is instructed to compress the primary YUV data and write the primary compressed data to the write address mov_adr. The primary YUV data of the current frame written in the bank A or B is compressed by the JPEG codec 34, and the generated primary compressed data is written in the memory area 32b after the write address mov_adr. The JPEG codec 34 also outputs the size information of the compressed data and the end signal to the CPU 36 when the compression processing is completed.

In step S19, it is determined whether or not the compression processing of the current frame is completed by the completion signal from the JPEG codec 34. If the end signal is not output, it is determined to be "NO" in step S19, and step S19
The process of is repeated. When the end signal is output, step S
It is determined to be "YES" at 19 and the process proceeds to step S21. In step S21, the current write address mov_adr is set to the start address p_adr of the primary compressed data of the nth frame.
Let [n] be the size information given from the JPEG codec 34 and the size of the primary compressed data of the nth frame.
Let p_sz [n]. Furthermore, the current write address mov_ad
The value obtained by adding this size information to r is the next write address mov_
Let it be adr.

In the following step S23, the thumbnail YU
V data compression processing and updated write address mov
JPEG writing of compressed thumbnail data to _adr
Instruct the codec 34. The thumbnail YUV data written in the thumbnail area of the SDRAM 32 is JP
The thumbnail compressed data is compressed by the EG codec 34 and is written at the write address mov_adr and thereafter. At this time as well, the JPEG CODEC 34 outputs the size information of the compressed data and the end signal to the CPU 36.

When the end signal is input, the CPU 36 determines YES in step S25, and proceeds to step S27. In this step, the current write address mov_adr is set to the start address s_ of the thumbnail compressed data of the frame.
Let adr [n] be the size information given from the JPEG codec 34 be the size p_sz [n] of the thumbnail compressed data of the nth frame, and add this size information to the current write address mov_adr to write address mov_adr. To update. When these processes are completed, step S29
The frame number n is incremented by.

In step S31, the shutter button 5 is pressed again.
It is determined whether or not 2 is pressed, and if "NO", the process proceeds to step S33. In this step, the value obtained by adding the compressed data write address and the target size of the compressed data (primary compressed data and thumbnail compressed data) to be generated next time is the end address end of the memory area 32b.
Determine if it exceeds _adr. If "NO" in the step S33, it is determined that the free space in the memory area 32b is sufficient, and the process returns to the step S15. As a result, the above-described processing is repeated, and the primary compressed data and the thumbnail compressed data are stored in the memory area 3
It is written in 2b alternately.

On the other hand, if it is determined "NO" in step S31 or "YES" in step S33, the CPU 36 proceeds to step S35 and sets the current frame number n to the total frame number N. Continuing step S3
In 7, the primary file having the data structure shown in FIG. 3 is formed in the memory card 40. At this time, the primary compressed data of a plurality of frames has the above-mentioned address p_adr.
Based on [n], it is sequentially read from the memory area 32b, and the read primary compressed data is recorded in the memory card 40 together with the primary index data. In step S39, a thumbnail file is formed in the memory card 40. Also at this time, the thumbnail compressed data of a plurality of frames are sequentially read from the memory area 32b based on the address s_adr [n], and the read thumbnail compressed data is recorded in the memory card 40 together with the thumbnail index data. In addition,
The total number N of frames is also written in the primary file and the thumbnail file.

When the mode selector switch 54 is switched to the "reproduction" side, the system controller 46 sets the reproduction mode. The CPU 36 is the memory card 4
The index data is read from the desired primary file and thumbnail file recorded in 0, and the read index data is given to the memory control circuit 30 together with the write request. The index data is written in the memory area 32a of the SDRAM 32, and as a result, an index table as shown in FIG. 6 is obtained in the memory area 32a. The normal reproduction address shown in FIG. 6 is the address information included in the index data of the primary file, and the search address is the address information included in the index data of the thumbnail file.

Subsequently, the CPU 36 refers to this index table to read the primary compressed data of the first frame from the memory card 40, and the memory control circuit 3
0 is requested to write this primary compressed data. The read primary compressed data is temporarily stored in the memory area 32a by the memory control circuit 30. The CPU 36 then instructs the JPEG codec 34 to expand the primary compressed data stored in the memory area 32a. In response to such a decompression instruction, the JPEG codec 34 requests the memory control circuit 30 to read the primary compressed data, and performs JPEG decompression on the read primary compressed data. The decompressed primary YUV data is written again in the memory area 32a of the SDRAM 32 by the memory control circuit 30.

The memory control circuit 30 also reads the expanded primary YUV data from the memory area 32a in response to the read request from the video encoder 42. The video encoder 42 converts the read primary YUV data into an NTSC format composite image signal, and outputs the converted composite image signal to the monitor 44. As a result, the first primary still image is displayed on the monitor 40.

An end signal generation circuit 34a is provided in the JPEG CODEC 34, and an end signal is output from the end signal generation circuit 34a every time the expansion processing of the compressed data for one screen is completed.

When the operator presses the set button 50,
The CPU 36 sequentially reproduces the primary compressed data on and after the next frame. The primary compressed data of each frame recorded in the memory card 40 is read according to the normal reproduction address of the index table, as described above. The read primary compressed data is SDRA
Given to the JPEG codec 34 via M32,
Primary Y expanded by PEG codec 34
The UV data is given to the video encoder 42 via the SDRAM 32. Then, a still image corresponding to this primary YUV data is displayed on the monitor 44. The primary compressed data of each frame is reproduced in response to the vertical synchronization signal output from SG16, and as a result, a moving image including a plurality of primary still images is output from monitor 44.

The operation of the set button 50 while the leading primary still image is displayed means an instruction for normal reproduction of the moving image, and in response thereto, the moving image following the leading primary image is at normal speed. Will be played.

When the leftward cursor button 48b is pressed during the normal reproduction of the moving image, the CPU 36
In response to the end signal output from the JPEG codec 34, the thumbnail still image of the next frame and subsequent frames is reproduced.
That is, the thumbnail compressed data, not the primary compressed data, is read from the memory card 40, and the corresponding thumbnail still image is displayed on the monitor 44. Specifically, the thumbnail compressed data of the next frame is read according to the search address of the index table,
JPEG via the memory area 32a of the SDRAM 32
It is given to the codec 34. The thumbnail compressed data is subjected to JPEG decompression, and the decompressed thumbnail YUV data is output to the video encoder 42 via the same memory area 32a. When playing back thumbnail compressed data,
The CPU 36 activates the zoom magnification circuit 42a, and the thumbnail YUV data given to the video encoder 42 is subjected to zoom magnification processing in addition to the encoding processing. As a result, the thumbnail still image is enlarged and displayed on the monitor 44.

When the end signal is output from the JPEG codec 34, the CPU 36 reads the thumbnail compressed data of the next frame from the memory card 40. That is, the primary compressed data is read in response to the vertical sync signal, while the thumbnail compressed data is read in response to the end signal. Also, since the end signal is output each time the expansion processing for one frame is completed, the JPEG codec 34
Sequentially expands the thumbnail compressed data of each frame. That is, the thumbnail compressed data of the current frame is
The thumbnail compressed data of the previous frame is decompressed immediately after the decompression process is completed. As a result, cursor button 4
After the operation of 8b, the thumbnail still image of each frame is updated at an earlier timing than during normal reproduction. That is,
The moving image is played back at high speed.

Since the size of the thumbnail compressed data is smaller than the size of the primary compressed data, the reproduction speed during high-speed reproduction is faster than when the primary compressed data is continuously expanded.

When the cursor button 48b is pressed again,
The CPU 36 invalidates the end signal and revalidates the vertical synchronization signal. That is, the CPU 36
The decompression command is output in response to the vertical synchronizing signal instead of the signal. In addition, the primary compressed data of the next frame at the time when the cursor button 48b is pressed again is the memory card 4
It is read from 0 and decompressed by the JPEG codec 34. As a result, the moving image composed of the primary still image is reproduced at the normal speed. Thus, once the reproduction of the moving image is started, the reproduction speed is switched between the normal speed and the high speed in response to the operation of the cursor button 48b. Therefore, the operation of the cursor button 48b while the moving image is being reproduced means changing the reproduction speed of the moving image.

If the rightward cursor button 48a is pressed while the moving image is being reproduced in the forward direction, the moving image is reproduced in the reverse direction. Whether the playback speed in the forward direction is normal speed or high speed, the cursor button 48a
When is pressed, the moving image is played in the reverse direction at normal speed. After the reproduction in the reverse direction is started, the reproduction speed is switched between the normal speed and the high speed each time the cursor button 48a is pressed. The operation of the cursor button 48a during the reproduction of the moving image also means the change of the reproduction speed.

When the leftward cursor button 48b is pressed while the moving image is being reproduced in the reverse direction,
Similarly to the above, the reproduction direction is reversed and the reproduction is performed at the normal speed.

When the reproduction mode is set, the CPU 36
Processes the flow diagrams shown in FIGS. When the desired primary file and thumbnail file are selected in step S51, the CPU 36 proceeds to step S5.
In step 3, the index information is read from this desired primary file and an index table is created. Similarly, in step S55, the index information is read from the desired thumbnail file and added to the index table. In a succeeding step S57, the frame number is initialized. That is, the frame number n is set to 0.

In step S59, the index table is referred to read the primary compressed data of the first frame (n = 0), and the memory control circuit 30 is requested to write the primary compressed data. The primary compressed data is stored in the memory area 32a of the SDRAM 32.
Written in. The CPU 36 continues to step S61.
Then, the JPEG codec 34 is instructed to perform decompression processing. JP
In response to this command, the EG codec 34 requests the memory control circuit 30 to read the primary compressed data, and decompresses the read primary compressed data.
When the expansion is completed, the memory control circuit 30 is requested to write the expanded primary YUV data, and the end signal is output to the CPU 36. Primary Y
The UV data is stored in the memory area 32a by the memory control circuit 30.

In step S63, it is determined whether the expansion processing for one frame has been completed. If the end signal is given, it is determined to be "YES", and subsequently, in step S65, it is determined whether or not the set button 50 is pressed. Unless the set button 50 is pressed, the process of step S65 is repeated, and as a result, the primary still image of the first frame continues to be displayed on the monitor 44.

If the set button 50 is pressed, the CPU 3
In step S67, the W flag 36a and the D flag 36b are reset. The reset state and the set state of the W flag 36a mean the normal speed and the high speed, respectively, and the reset state and the set state of the D flag 36b mean the forward direction and the reverse direction, respectively. In a succeeding step S69, it is determined whether or not the W flag 36a is set. If “YES” in the step S69, it is determined that the W flag 36a is set and the process directly proceeds to the step S73, but if “NO”, it is determined that the reset state is set, and the step S73 is performed through the step S73. Proceed to.

In step S71, it is determined whether or not the vertical synchronizing signal is input. When it is determined that the vertical synchronizing signal is input, the process proceeds to step S73. Set button 5
Since the double flag 36a is reset in response to the operation of 0, immediately after the set button 50 is pressed, the input of the vertical synchronizing signal is waited for and the process proceeds to step S73. Step S7
At 3, the state of the D flag 36b is determined. If it is in the reset state, the process proceeds to step S75, but if it is in the set state, the process proceeds to step S77.

When the D flag 36b is in the reset state, C
The PU 36 increments the frame number n in step S75, and determines in step S79 whether the W flag 36a is set. In step S79, "N
If it is "O", then in step S81 the zoom magnification circuit 42a
Is disabled, the primary compressed data of the nth frame is read from the primary file in step S85, and the process proceeds to step S89. On the other hand, in step S79, "Y
If "ES", the zoom magnification circuit 42 is operated in step S83.
a is activated, the thumbnail compressed data of the nth frame is read from the thumbnail file in step S87, and the process proceeds to step S89.

In step S89, the CPU 36 causes the JPE
Instruct the G codec 34 to perform decompression processing. Therefore, the expansion process is performed in the same manner as described above, and the corresponding still image is displayed on the monitor 44. When the primary compressed data is expanded, the primary still image is displayed as it is,
When the thumbnail compressed data is expanded, the thumbnail still image is enlarged and displayed.

When the decompression processing is completed, the end signal becomes JPE.
When output from the G codec 34, the CPU 36 determines “YES” in step S91, and continues to step S93.
Determines whether the frame number n is N-1.
That is, it is determined whether the frame number of the decompressed compressed data is the end number. In step S93, "YE
If “S”, the process returns to step S57 shown in FIG.
If “NO”, the process proceeds to step S95.

In step S95, the cursor button 48
Determine if b is pressed. If "YES" here, the CPU 36 proceeds to a step S97 and determines whether or not the W flag 36a is set. "N
If "O", the W flag 36a is reset in step S99, but if "YES", the W flag 36a is reset in step S101. That is, the states of the W flag 36a are inverted in steps S99 and S101.
When the process in step S99 or S101 ends, the process returns to step S69.

If "NO" in the step S95, it is determined whether or not the cursor button 48a is pressed. If "YES" in step S103, step S105
Then, the W flag 36a and the D flag 36b are reset and the process returns to step S69 shown in FIG. 10. If "NO", the process directly returns to step S69. If “NO” in the step S97, it is determined that the double flag 36a is not set, and the double flag 36a is determined in a step S99.
Set.

Returning to FIG. 8, in step S73, "YE
If it is determined to be "S", the CPU 36 decrements the frame number n in step S77 and processes steps S107 to S133 shown in Fig. 10. However, in these processes, the frame number n is "0" in step S121. Except that the cursor key 48a is operated in step S123 and the cursor key 48b is operated in step S131.
Same as 5. Therefore, duplicated description will be omitted.

According to this embodiment, when the high speed reproduction is set, the thumbnail compressed data of the next frame is expanded in response to the end signal of the expansion process. That is, the thumbnail compressed data of each frame is continuously reproduced. The size of the thumbnail compressed data is smaller than that of the primary compressed data. Therefore, the moving image can be reproduced at a higher speed than in the conventional technique using the primary compressed data for both normal reproduction and high-speed reproduction. The point of reproducing still images of all frames is the same as the conventional technique.

In this embodiment, the primary file having the data structure as shown in FIG. 3 is created, but the primary compressed data is A together with the audio data.
It may be stored in a VI file. The AVI file is formed by alternately recording one second of audio data and one second of primary compressed data.

[Brief description of drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention.

2A is an illustrative view showing a memory area 32a of the SDRAM 32 shown in FIG. 1 embodiment, and FIG. 2B is an illustrative view showing a memory area 32b.

FIG. 3 is an illustrative view showing a data structure of a primary file and a thumbnail file.

FIG. 4 is a flowchart showing a part of processing of a CPU shown in FIG. 1 embodiment.

5 is a flowchart showing another portion of the processing by the CPU shown in FIG. 1 embodiment. FIG.

FIG. 6 is an illustrative view showing a table used when reproducing a moving image.

FIG. 7 is a flowchart showing another portion of the processing by the CPU shown in FIG. 1 embodiment.

FIG. 8 is a flowchart showing yet another portion of the processing by the CPU shown in FIG. 1 embodiment.

FIG. 9 is a flowchart showing another portion of the processing by the CPU shown in FIG. 1 embodiment.

FIG. 10 is a flowchart showing another portion of the processing by the CPU shown in FIG. 1 embodiment.

[Explanation of symbols]

10 ... Digital camera 30 ... Memory control circuit 32 ... SDRAM 34 ... JPEG codec 36 ... CPU 40… Memory card 42 ... Video encoder 44 ... Monitor 46 ... System controller 48a, 48b ... Cursor buttons 52 ... Shutter button 54 ... Mode selector switch

Claims (11)

(57) [Claims] 1. A movement of a subject when a moving image shooting instruction is received.
First to generate a plurality of main still image signals forming an image
Signal generating means, second signal generating means for generating a plurality of reduced still image signals respectively corresponding to the plurality of main still image signals , a main image file including the plurality of main still image signals
First creating means for creating, and a reduced image file including the plurality of reduced still image signal
A digital camera comprising a second creating means for creating . 2. The first creating means includes the plurality of main still images.
The main management information for individually managing the image signal is set in the main image frame.
File, and the second creating means individually outputs the plurality of reduced still image signals.
Write the reduced management information to be managed in the reduced image file.
Writing, according to claim 1 digital camera according. 3. The first creating means is the main image file.
Is created in the recording medium, and the second creating means creates the reduced image file in the recording medium.
Created in the body, the main management information includes main address information indicating the recording position of each main still image signal on the recording medium , and the reduction management information indicates the recording position of each reduced still image signal on the recording medium. 3. The digital camera according to claim 2 , including reduced address information indicating . Wherein said main image based on the previous SL key management information
First reproducing means for reproducing a plurality of main still image signal from the file, from the reduced image file on the basis of the reduced management information
Second reproduction means for reproducing the plurality of reduced still image signals, activation means for activating one of the first reproduction means and the second reproduction means when a reproduction instruction is accepted , and activation by the activation means Switching the playback means
Further comprising switching means for switching in response to the indication ,
The digital camera according to claim 2 or 3 . 5. A generating means for generating a timing signal every predetermined period, wherein the first reproducing means reproduces each of the plurality of main still image signals in response to the timing signal . The digital camera according to claim 4 , wherein the second reproducing means continuously reproduces each of the plurality of reduced still image signals. Wherein said second reproducing means to facilities the zoom magnification processing to each of the plurality of reduced still picture signal, according to claim 4 or
5. The digital camera described in 5 . 7. A moving image stored in a main image file
Reproduction for reproducing a plurality of main still image signals forming a
Means, second reproducing means for reproducing a plurality of reduced still image signals stored in a reduced image file and respectively corresponding to the plurality of main still image signals, the first reproducing means when the reproduction instruction is accepted , and the second reproducing means
Switching the reproducing means is activated by the activation means, and the activation circuit for activating one of the second reproducing means 換指
A moving image having switching means for switching in response to
Playback device. 8. The main image file includes the plurality of main image files.
Stores main management information for individually managing still image signals, and the reduced image file stores the plurality of reduced still image signals.
Reduced management information that is individually managed is stored, and the first reproduction means stores the composite management information based on the main management information.
A number of main still image signals are reproduced, and the second reproducing means reproduces the plurality of main still image signals based on the reduction management information.
The moving image according to claim 7, wherein a number of reduced still image signals are reproduced.
Image reproduction device . 9. The main image file and the reduced image
The file is recorded on a recording medium, and the main management information is stored in each main recording medium.
Includes main address information that indicates the recording position of the still image signal required.
However, the reduction management information is the respective reduction information on the recording medium.
Includes reduced address information indicating the recording position of the small still image signal.
The moving image reproducing apparatus according to claim 8. 10. A timing signal is generated every predetermined period.
Generating means, wherein the first reproducing means includes a plurality of main still image signals.
Is reproduced in response to the timing signal, and the second reproducing means reproduces each of the plurality of reduced still image signals.
Is continuously reproduced, according to any one of claims 7 to 9.
The moving image playback device installed. 11. The second reproducing means comprises the plurality of reduced still images.
8. The zoom enlargement process is applied to each of the image signals.
Item 10. The moving image reproducing apparatus according to any one of 10.