JP2003037810A - Video recording and playback device - Google Patents

Abstract

(57) [Summary] [Problem] To provide a moving image recording / reproducing apparatus that does not require an operation such as setting a dividing point and dividing the moving image file by a user when editing and erasing an unnecessary portion having a small motion change amount. . SOLUTION: At the time of moving image division reproduction, a reference change amount which is set and stored in a reference change amount setting storage unit 22 and serves as a reference for a motion change amount determination, image data being currently processed and image data immediately before And the amount of movement change with the trigger determination unit 23
The file is automatically divided and recorded for each scene having a motion change amount larger than the reference change amount, and a portion having a smaller motion change amount than the reference change amount is automatically recorded. to erase. The setting changeover switch 25 can switch and set an initial reference change amount of the default value stored in the default setting storage unit 24 as the reference change amount and an arbitrary reference change amount arbitrarily set by the user by the change amount setting unit 21. is there. The image processing apparatus further includes an erasure setting unit 26 that allows a user to designate erasure of a moving image file before division.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving image recording / reproducing apparatus.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to the block diagram shown in FIG. FIG. 4 is a block diagram showing the structure of a conventional moving image recording / reproducing apparatus. As shown in FIG. 4, the conventional moving image recording / reproducing apparatus is
An image input unit 41 including a CCD / AGC, a signal processing unit 42 for generating a YUV signal, a control unit 43 for controlling the entire apparatus, a DMA controller 44 for direct memory access control, a memory 45 for storing various data, and a moving image. An image compression / expansion unit 46 that compresses / expands data, records compressed image data on a recording medium,
A recording / reading unit 47 for reading and writing, a recording medium 48 as a recording medium for recording compressed image data, a display interface 49 for controlling display display, and a display 50 for image display are provided.

The operation of the conventional moving image recording / reproducing apparatus shown in FIG. 4 will be described below. First, the operation during image recording will be described. The optical signal of the photographed subject is input to the image input unit 41, subjected to photoelectric conversion, converted into an analog video signal, processed by AGC or the like, and output to the signal processing unit 42.

The analog video signal input to the signal processing unit 42 is A / D converted and converted into a digital video signal, and at the same time, gamma correction, filtering, contour enhancement processing and the like are performed to obtain Y (luminance). ), U (color difference of red), V
A (blue color difference) signal is generated. The control unit 43 generates the Y, U, V generated based on the operation of the image processing program.
The signal is stored in the memory 45 under the control of the DMA controller 44.

Next, the stored digital video signal is D
It is read out to the image compression / expansion unit 46 via the MA controller 44 and subjected to compression processing. The compressed image data is temporarily stored in the memory 45, and under the control of the control unit 43, header information including a shooting start time is added according to a predetermined format, and then, via the recording / reading unit 47. It is recorded on the recording medium 48.

In the case of recording a moving image for a long time, the image compression / decompression unit 46 performs compression processing several times, and when recording on the recording medium 48, it is recorded as one moving image file. It Therefore, the header information in which the shooting start time is recorded is attached only to the first compressed image data when the recording is started.

Next, the operation during normal image reproduction will be described. One moving image file recorded on the recording medium 48 is read by the recording / reading unit 47, and D
It is temporarily stored in the memory 45 via the MA controller 44. Next, the control unit 43 reads the header information of the moving image file from the memory 45, and reads the shooting start time recorded in the header information.

The compressed image data written in the memory 45 is transferred from the memory 45 to the DMA controller 4
4 is sent to the image compression / decompression unit 46 and subjected to decompression processing, and again as decompressed image data, the memory 45
Memorized in. Next, the decompressed image data from the memory 45 is used as the DMA controller 44 and the display interface 4.
It is sent to the display 50 via 9 and displayed on the display.

[0009]

However, in the conventional moving picture recording / reproducing apparatus, there is no change in the moving picture data recorded as one moving picture file, or the amount of movement change is extremely small. When the user has instructed to perform divided reproduction of a moving image file that does not need to be edited and erased, the movement does not change at all in the moving image file, or the amount of movement change is extremely small. It is said that the user himself / herself has to select an unnecessary portion, set division points for the unnecessary portion, divide the moving image file, and then delete only the unnecessary portion. There was a problem that it took time and effort.

The moving image recording / reproducing apparatus according to the present invention has been made in view of the above circumstances, and in the case of instructing the divided reproduction of a moving image file in which an unnecessary portion having a small amount of motion change is to be edited and erased. In, the user does not have to select and set the division point to perform the operation such as dividing the moving image file, and the movement change amount is set to an arbitrary reference change amount set by the user to an arbitrary reference change amount or an initial value in advance. A portion smaller than the initial reference change amount set as is automatically extracted, and a divided moving image file is created by automatically erasing the portion having a small movement change amount.

[0011]

A moving image recording / reproducing apparatus according to the present invention is constituted by the following specific technical means.

The first technical means includes a reference change amount setting storage means for setting a reference change amount as a reference for determining a motion change amount, image data currently being processed, and image data immediately before. And a motion change amount determination means for determining whether or not the motion change amount between the two is larger than the reference change amount, and during moving image division reproduction, based on the output of the motion change amount determination means, A moving image recording in which a file is automatically divided and recorded for each scene in which there is a larger amount of movement change than the reference change amount, and a portion having a smaller amount of movement change than the reference change amount is automatically deleted. It is characterized by being a reproducing apparatus.

The second technical means is such that, in the moving picture recording / reproducing apparatus according to the first technical means, the user can previously decide whether or not to delete the original moving picture file before the division after the end of the moving picture division reproduction. The moving image recording / reproducing apparatus is provided with an erasing setting means that can be selectively designated.

A third technical means is the moving picture recording / reproducing apparatus according to the first or second technical means, wherein the reference change amount set by the reference change amount setting storage means is:
A moving image recording / reproducing apparatus having a default setting storage means capable of storing and setting the initial reference change amount so as to use an initial reference change amount which is a predetermined initial value. Is.

A fourth technical means is the moving picture recording / reproducing apparatus according to the first or second technical means, wherein the reference change amount set by the reference change amount setting storage means is:
In order to use an arbitrary reference change amount designated and set by the user to an arbitrary set value, a moving image recording provided with a user setting means by which the user can specify and set the arbitrary reference change amount to an arbitrary set value. It is characterized by being a reproducing apparatus.

A fifth technical means is the moving image recording / reproducing apparatus according to the third or fourth technical means, wherein the motion change amount determining means determines the reference change amount for determining the motion change amount. , The default reference change amount stored and set by the default setting storage means or the arbitrary reference change amount specified and set by the user setting means is switched and set in the reference change amount setting storage means. The moving image recording / reproducing apparatus is provided with a setting switching means capable of performing the above.

A sixth technical means is the moving image recording / reproducing apparatus according to any one of the first to fifth technical means, wherein the motion change amount determining means determines that the motion change amount is larger than the reference change amount. When the image data determined to be small is continuously generated for a predetermined number of image frames or more, the image frames including the image data determined to have the small amount of motion change are automatically automatically displayed for the first time. It is characterized in that it is a moving image recording / reproducing apparatus that can be erased.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a moving image recording / reproducing apparatus according to the present invention will be described below with reference to the drawings. The operation during image recording and the operation during normal image reproduction of the moving image recording / reproducing apparatus according to the present invention are exactly the same as those of the conventional moving image recording / reproducing apparatus shown in FIG. The description of the operation of the moving image recording / reproducing apparatus according to the present invention during image recording and normal image reproduction will be omitted. FIG. 1 is a block diagram showing the configuration of the moving image recording / reproducing apparatus according to the present invention.

As shown in FIG. 1, a moving image recording / reproducing apparatus according to the present invention includes an image input section 1 including a CCD / AGC and the like.
1, a signal processing unit 12 that generates a YUV signal, a control unit 13 that controls the entire apparatus, a DMA controller 14 that performs direct memory access control, a memory 15 that stores various data, and a compression / decompression process for moving image data. An image compression / expansion unit 16 to be applied, a recording / readout unit 17 for recording / reading compressed image data to / from a recording medium,
The recording medium 18 is a recording medium for recording compressed image data, a display interface 19 for controlling display display, and a display 20 for displaying an image.

Further, the moving picture recording / reproducing apparatus according to the present invention functions effectively when the division reproduction of the moving picture file in which the unnecessary portion having a small amount of motion change is to be edited and deleted is instructed. It also has each circuit block. That is, the moving image recording / reproducing apparatus according to the present invention has an arbitrary value set by the user as a reference change amount that is a reference for determining the magnitude of the motion change amount regarding the image data currently being processed. In order to use the reference change amount, a change amount setting unit 21 that provides a user setting means by which the user can specify and set the arbitrary reference change amount to an arbitrary set value, and a motion change amount related to image data currently being processed. As the reference change amount that is the reference for determining the size of
In order to use an initial reference change amount which is a predetermined initial value, a default setting storage unit 24 capable of storing and setting the initial reference change amount is provided.

Further, in the moving image recording / reproducing apparatus according to the present invention, the arbitrary reference change amount designated and set by the change amount setting unit 21 which is a user setting means and the initial reference stored in the default setting storage unit 24 are set. Change the amount of change,
One of them is selected and is output to the reference change amount setting storage unit 22 as the reference change amount for the determination of the motion change amount, and the reference for the change amount of movement selected by the setting change switch 25. A reference change amount setting storage unit 22 that sets and stores a change amount, and a motion change amount between the image data currently being processed and the previous image data is set and stored in the reference change amount setting storage unit 22. The trigger change unit 23 for providing a motion change amount determination means for determining whether or not there is a large amount of change compared to the reference change amount, whether or not to delete the original moving image file before the division after the moving image division reproduction is completed. The deletion setting unit 2 in which the user can select and specify in advance
6 is provided.

First, the operation during divided reproduction of a moving image file will be described with reference to FIG. The reference change amount (that is, the size of the reference motion vector / luminance and the number of macroblocks having a size equal to or greater than the magnitude of the motion vector / luminance) at the time of moving image division reproduction using the setting switch 25 in advance. Is used as an arbitrary reference change amount specified by the user by the change amount setting unit 21 or
Alternatively, the user selects whether to use the initial reference change amount stored in the default setting storage unit 24.

When using the arbitrary reference change amount set by the user by the change amount setting section 21, the setting changeover switch 25 is used.
The arbitrary reference change amount set by the user on the basis of the selection instruction from is set in the reference change amount setting storage unit 22 as a reference change amount at the time of moving image division reproduction before starting the moving image division reproduction operation. To be done.

On the other hand, when using the initial reference change amount which is the initial value stored in the default setting storage unit 24, based on the selection instruction from the setting changeover switch 25,
The initial reference change amount stored as the default value is used as the reference change amount during the moving image division reproduction, before the start of the moving image division reproduction operation, and the reference change amount setting storage unit 22.
Is set to.

Further, through the erasure setting section 26, the user selects whether or not to delete the original moving image file before division after the moving image division reproduction is completed, and prior to the start of the moving image division reproduction operation. Are set in the reference change amount setting storage unit 22.

When the moving image division reproduction is started, one specified moving image file is read out from the moving image files recorded on the recording medium 18 by the recording / reading unit 17, and the DMA controller 14 is operated. Is temporarily stored in the memory 15 via. Next, the control unit 13 reads the header information of the moving image file from the memory 15 and reads the shooting start time recorded in the header information.

The compressed image data written in the memory 15 is sent from the memory 15 to the image compression / decompression unit 16 via the DMA controller 14, and the original digital video signal is subjected to decompression processing to obtain a decompressed image. The data is again stored in the memory 15.

Next, the decompressed image data read from the memory 15 is sent to the display 20 via the DMA controller 14 and the display interface 19 and displayed on the display. At the same time, the decompressed image data recorded in the memory 15 is read out to the image compression / decompression unit 16 via the DMA controller 14 and subjected to a compression process, as in the case of recording and recording a normal moving image. The compressed image data is temporarily stored in the memory 15, and the control unit 1
Under the control of No. 3, the header information including the shooting start time is added according to a predetermined format, and then recorded on the recording medium 18 via the recording / reading unit 17.

Next, there is little change in the motion of the reproduced moving image,
The operation when the amount of change in motion between the image data currently being processed and the image data immediately before is smaller than the reference amount of change will be described based on the flowchart shown in FIG. FIG. 2 is a flowchart for explaining the operation of the moving image recording / reproducing apparatus according to the present invention when the change in reproduced image data is small. The operation of reading out from the recording medium 18, performing the image expansion processing, and temporarily storing the expanded image data in the memory 15 is the same as the operation of the conventional moving image recording / reproducing apparatus. is there.

First, as described above, either the arbitrary reference change amount preset by the user to an arbitrary set value or the initial reference change amount which is an initial value as a default value is set by the setting changeover switch 25. By the switching setting, the reference change amount setting storage unit 22 is set and stored as the reference change amount serving as a reference for determining the motion change amount (step S1). Here, after setting the state of "recording" indicating that the reproduced image data is divided and recorded on the recording medium 18 (step S2), the moving image division reproduction of the compressed image data accumulated in the recording medium 18 is performed. Then, as described above, the compressed image data is transmitted to the image compression / decompression unit 16, subjected to decompression processing, and once read and stored in the memory 15 as decompressed image data. The decompressed image data stored in the memory 15 is again DMA
It is read out to the image compression / decompression unit 16 via the controller 14 and subjected to compression processing.

At this time, the amount of movement change A between the immediately preceding image data and the image data currently subjected to compression processing (that is, the magnitude of the motion vector / luminance and the magnitude greater than the magnitude of the motion vector / luminance). And the reference change amount B preset in the reference change amount setting storage unit 22 (that is, the reference motion vector / luminance magnitude and a magnitude equal to or greater than the motion vector / luminance magnitude). (The number of macroblocks having a size) is sent to the trigger determination unit 23 which is a motion change amount determination means (step S3). Here, when the movement change amount A is smaller than the reference change amount B (YES in S4), the trigger determination unit 23 moves the control unit 13 to the control unit 13.
In response to this, an end signal indicating that the divided recording on the recording medium 18 is completed is sent (step S5).

When the control section 13 detects the end signal, the control section 13 controls the DMA controller 14 to temporarily stop the recording operation without storing the currently compressed image data in the memory 15 ( In step S6), the moving image data recorded on the recording medium 18 as a scene having a large amount of movement change larger than the reference amount of change B is created as one moving image file (step S7), and is then compressed. The compressed image data is transferred to the "non-recording state" in which the recording medium 18 is not recorded (step S).
8). Thus, the moving image file is automatically divided and recorded for each scene in which the movement change amount A is larger than the reference change amount B. On the other hand, when the movement change amount A is smaller than the reference change amount B, the reproduced image data is not recorded on the recording medium 18 and is automatically erased as unnecessary image data.

On the other hand, if it is determined in step S4 that the amount of movement change A is larger than the reference amount of change B (NO in step S4), the compression process is currently performed as in the case of normal photographing and recording. The image data is temporarily stored in the memory 15
After being attached with header information including a shooting start time in accordance with a predetermined format, it is recorded on the recording medium 18 via the DMA controller 14 and the recording / reading unit 17 (step S9), and the process returns to step S3. The state of "recording" is maintained. That is,
When the amount of change in movement A is larger than the amount of change in reference B, the reproduced image data is written as compressed image data in the recording medium 18. Thus, as described above, the moving image file is automatically divided and recorded for each scene in which the motion variation amount A is larger than the reference variation amount B.

Here, the determination of the amount of movement change will be described in more detail. Usually, the motion vector / luminance is obtained for each macroblock of a 16 dot × 16 dot image. Further, for example, in the case of QVGA (320 dots × 240 dots) image data, it is composed of 300 macroblocks. Thus, for example, as a reference change amount B at the time of moving image division reproduction, a reference motion vector
When the luminance magnitude is 10 and the number of macroblocks is set to 5, the condition that the motion variation amount A has five or more macroblocks with a motion vector / luminance magnitude of 10 or more is satisfied. If it is, it is determined that the amount of movement change is large. That is, the reproduction image data is recorded on the recording medium 18 only when the condition is satisfied, and the reproduction image data that does not satisfy the condition and has a small amount of motion change is not recorded on the recording medium 18.

Note that such a condition can be set and changed by the user using the change amount setting section 21 to set the reference change amount B to an arbitrary set value. Further, in the present embodiment, the reproduced image data that does not satisfy the above condition is automatically erased without being recorded in the recording medium 18, but the present invention is not limited to such operation. Reproduction image data that does not satisfy the above condition (that is, the trigger determination unit 23 that is the motion change amount determination unit).
When the reproduction image data which is determined that the motion variation amount A is smaller than the reference variation amount B) continuously occurs for a predetermined number of image frames, the motion variation amount continuously applied is small for the first time. Instead of recording the image frame including the image data determined to be in the recording medium 18, the image frame may be automatically erased.

Next, when the state is changed to the "non-recording state" in which the recording medium 18 is not recorded, the reproduced image data is changed again and the movement change amount increases. Will be described based on the flowchart shown in FIG. FIG. 3 is a flow chart for explaining the operation in the moving image recording / reproducing apparatus according to the present invention when the reproduced image data changes a lot. The operation of reading out from the recording medium 18, performing image expansion processing, and temporarily storing the expanded image data in the memory 15 is similar to the operation of the conventional moving image recording / reproducing apparatus. is there.

First, as described above, either the arbitrary reference change amount preset by the user by setting an arbitrary set value or the initial reference change amount which is an initial value as a default value is set by the setting changeover switch 25. By the switching setting, the reference change amount setting storage unit 22 is set and stored as the reference change amount serving as a reference for determining the motion change amount (step S11). Here, in the state where the “non-recording state” indicating that the reproduced image data is not separately recorded on the recording medium 18 is set (step S1
2) When the moving image division reproduction of the compressed image data accumulated in the recording medium 18 is performed, as described above, the compressed image data is transmitted to the image compression / expansion unit 16 and subjected to the expansion process to obtain the expanded image. The data is once read and stored in the memory 15 as data. The decompressed image data stored in the memory 15 is read again to the image compression / decompression unit 16 via the DMA controller 14 and subjected to compression processing.

At this time, the motion change amount A between the previous image and the currently compressed image (that is, the magnitude of the motion vector / luminance and the magnitude greater than the magnitude of the motion vector / luminance). The number of macroblocks, and the reference change amount B preset in the reference change amount setting storage unit 22 (that is, the reference motion vector / brightness magnitude and the magnitude larger than the motion vector / brightness magnitude) (The number of macroblocks it has) is sent to the trigger determination unit 23, which is a motion change amount determination means (step S13). Here, when the movement change amount A is larger than the reference change amount B (YE in S14).
S), the trigger determination unit 23 sends to the control unit 13 a start signal indicating that division recording on the recording medium 18 is started (step S15).

When the control unit 13 detects the start signal,
The controller 13 controls the DMA controller 14 to temporarily store the currently compressed image data in the memory 15 and start the recording operation (step S16). Then, the control unit 13 attaches the header information including the shooting start time in accordance with a predetermined format, and then, via the DMA controller 14 and the recording / reading unit 17, the recording medium 1
8 is started to record as a new moving image file (step S17). After that, the reproduction image data is transferred to the "recording" state indicating that the reproduction image data is divided and recorded on the recording medium 18 (step S18). Therefore, the movement change amount A is
When the amount of change exceeds the reference change amount B, again,
Until the control unit 13 detects the end signal, as in the case of normal photographing and recording, the compression process is performed several times as needed, and the compression process is performed and the data is sequentially recorded in the recording medium 18. Become.

On the other hand, when it is determined in step S14 that the motion variation amount A is smaller than the reference variation amount B (NO in step S14), the memory 15 is not stored with the currently compressed image data. The "non-recording state" is maintained (step S1).
9). That is, when the movement change amount A is smaller than the reference change amount B, the reproduced image data is automatically recorded as unnecessary image data without being recorded in the recording medium 18.

Finally, in advance, after the end of the moving image division reproducing operation, the user sets the original moving image file before division through the deletion setting section 26 by the user.
In the case where it is designated and set in the reference change amount setting storage unit 22, the moving image file newly recorded on the recording medium 18 after the divided reproduction is left, and the original moving image file before the divided reproduction of the moving image is It will be erased from the recording medium 18.

[0042]

As can be easily understood from the above description, according to the moving image recording / reproducing apparatus of the present invention, image data having a small amount of motion change less than the reference amount of change in moving image division reproduction is It is an unnecessary part for the user,
Image data with a small amount of motion change is automatically extracted and automatically deleted, and only image data with a large amount of motion change greater than the reference amount of change is divided and automatically recorded as a moving image file. Therefore, it is possible to completely eliminate the trouble of the user to specify the division and delete the unnecessary portion as in the conventional technique.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing a configuration of a moving image recording / reproducing apparatus according to the present invention.

FIG. 2 is a flow chart for explaining the operation in the moving image recording / reproducing apparatus according to the present invention when there is little change in reproduced image data.

FIG. 3 is a flow chart for explaining the operation in the moving image recording / reproducing apparatus according to the present invention when the change in reproduced image data is large.

FIG. 4 is a block configuration diagram showing a configuration of a conventional moving image recording / reproducing apparatus.

[Explanation of symbols]

11, 41 ... Image input section, 12, 42 ... Signal processing section, 1
3, 43 ... Control unit, 14, 44 ... DMA controller,
15, 45 ... Memory, 16, 46 ... Image compression / decompression unit, 1
7, 47 ... Recording and reading section, 18, 48 ... Recording medium, 1
Reference numeral 9, 49 ... Display interface, 20, 50 ... Display, 21 ... Change amount setting section (user setting means), 22 ...
Reference change amount setting storage unit, 23 ... Trigger determination unit (movement change amount determination means), 24 ... Default setting storage unit, 25 ... Setting change switch, 26 ... Erase setting unit.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5C053 FA14 FA30 GB19 GB21 KA04                       KA24 LA06                 5C059 KK36 NN23 SS12 TA00 TC13                       TD12 UA02 UA30                 5D044 AB05 AB07 EF03 FG10 GK08                       GK12                 5D110 AA27 AA29 BB20 CA05 CA21                       CA50 CB06 CK02

Claims (6)

[Claims] 1. A reference change amount setting storage unit for setting a reference change amount serving as a reference for determining a motion change amount, and a motion change amount between the image data currently being processed and the previous image data. Is larger than the reference change amount, and a motion change amount determining means for determining whether or not the reference change amount is greater than or equal to the reference change amount at the time of moving image division reproduction. For each scene with a large amount of movement change,
A moving image recording / reproducing apparatus characterized in that a file is automatically divided and recorded, and a portion having a smaller amount of movement change than the reference amount of change is automatically erased. 2. The moving image recording / reproducing apparatus according to claim 1, wherein the user can select and specify in advance whether or not to delete the original moving image file before the division after the moving image division reproduction is completed. A moving image recording / reproducing apparatus comprising means. 3. The moving image recording / reproducing apparatus according to claim 1, wherein an initial reference change amount that is a predetermined initial value is used as the reference change amount set by the reference change amount setting storage means. Therefore, the moving image recording / reproducing apparatus is provided with a default setting storage unit capable of storing and setting the initial reference change amount. 4. The moving image recording / reproducing apparatus according to claim 1, wherein the reference change amount set by the reference change amount setting storage means is set by the user as an arbitrary reference change amount. In order to use the moving picture recording / reproducing apparatus, the user is provided with a user setting means by which the user can specify and set the arbitrary reference change amount to an arbitrary setting value. 5. The moving image recording / reproducing apparatus according to claim 3, wherein the default setting storage means stores and sets the reference change amount for the motion change amount determination means to determine the motion change amount. The amount of change in the initial reference,
Alternatively, it is provided with a setting switching unit that can switch which of the arbitrary reference change amounts designated and set by the user setting unit to be used and set in the reference change amount setting storage unit. A moving image recording / reproducing device. 6. The moving image recording / reproducing apparatus according to claim 1, wherein the image data determined by the motion change amount determining means to be smaller than the reference change amount in advance is image data. A moving image characterized by automatically erasing image frames including image data for which the amount of motion change is determined to be small for the first time when the number of consecutive image frames exceeds a predetermined number. Image recording / reproducing device.