JP3586580B2 - Image display device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a moving image camera conforming to the ASF format, and more particularly to an image display device that displays time when playing a normally shot or interval shot image.
[0002]
[Prior art]
The conventional technique will be described below with reference to FIGS.
[0003]
6 is a block diagram of a video camera conforming to the ASF format, FIG. 7 is a functional block diagram of the control unit 403, and FIG. 8 is a flowchart of processing during normal shooting, interval shooting, and playback. ) Is a processing flowchart at the time of shooting, FIG. 8B is a processing flowchart at the time of reproduction, FIG. 9 is a diagram showing a data format recorded on a recording medium, and FIG. 10 is a diagram showing a conventional display method on a display. is there.
[0004]
Referring to FIG. 6, a moving image camera conforming to the ASF format includes an image input unit 401 including a CCD and an AGC, a signal processing unit 402 for generating a YUV signal, a control device 403 for controlling the entire system, a DMA controller 404, It includes a memory 405, a user interface 406 for handling key inputs and the like, an image compression / expansion unit 407, a recording / reading device 408 for recording and reading compressed data on / from a medium, a recording medium 409, a display interface (IF) 410, and a display 411.
[0005]
FIG. 7 is a functional block diagram of the control unit 403 in FIG.
[0006]
The control unit 403 includes a header creation unit 501 for creating a header, a signal processing control unit 502 for controlling the signal processing unit 402, a display IF control unit 503 for controlling the display unit IF 406, and a DMA controller control for controlling the DMA controller 404. Unit 504, CPU 505 for controlling the entire control unit 403, recording and reading control unit 506 for controlling the recording and reading unit 408, image compression and decompression control unit 507 for controlling the image compression and decompression unit 407, and user interface control for controlling the user interface 406 A unit 508 and a program memory 509 are provided.
[0007]
Next, the operation will be described with reference to FIGS.
[0008]
At the time of shooting, normal shooting and interval shooting are selected by a user (not shown), and the selected data is input to the CPU 505 via the user interface 406 provided in the user interface 406 and the control unit 403. Then, shooting is performed based on the input data.
[0009]
First, an optical signal of a photographed subject (not shown) is input to an image input unit 401, photoelectrically converted into an analog video signal, subjected to processing such as AGC, and output to a signal processing unit 402.
[0010]
The video signal input to the signal processing unit 402 is A / D converted and converted into a digital signal, and is also subjected to processing such as gamma correction, filtering, and edge enhancement processing, so that Y (luminance) and U (red (Color difference) and V (blue color difference) signals are generated.
[0011]
A control unit 403 controls a signal processing control unit 502 and a DMA controller control unit 504 based on a program in a program memory 509 by a CPU 505 provided therein, and transmits the generated Y, U, and V signals via the DMA controller 504. In the memory 405.
[0012]
Next, the stored digital video signal is read out to the image compression / decompression unit 407 via the DMA controller 404 and subjected to compression processing. This is because the CPU 505 controls the DMA controller control unit 504 to control the DMA controller 404, and the CPU 505 issues a compression command to the image compression / expansion unit 407 via the image compression / expansion control unit 507. Is
[0013]
The time stamp is added by the image compression / expansion unit 407. The control unit 403 and the image compression / decompression unit 407 exchange data using control signals such as start of compression / decompression and response signals such as end of compression / decompression.
The compressed data is temporarily stored in the memory 405, added with header information according to a predetermined format by a header generation unit 501 of the control unit 403, sent to the recording / reading unit 408, and recorded on the recording medium 409. Is done.
[0014]
The control at this time is also performed by the control unit 403, and is controlled by the image compression / decompression control unit 507 of the CPU 505, the DMA controller control unit 504, the header generation unit 501, and the recording / reading control unit 506. The recording / reading unit 408 notifies the recording / reading control unit 506 of data such as the end.
[0015]
At this time, as shown in FIG. 9, a photographing start time is recorded in the header information, and a flag indicating the photographing time is recorded for normal photographing.
[0016]
In the case of long moving image recording, compression is performed several times, and is recorded as one file when recording on a recording medium. Therefore, the header is attached only at the first compression when recording is started.
[0017]
At the same time, the display interface (IF) 410 is controlled by the CPU 505 provided inside the control unit 403 controlling the display IF control unit 503, and the image on the memory 405 fetched from the signal processing unit 402 is displayed on the display interface (IF). The information is displayed on the display 411 via the (IF) 410.
[0018]
The display interface (IF) 410 has an OSD (On Screen Display Control) function, and performs OSD display by writing data to be displayed in the OSD display data area on the memory 405.
[0019]
Next, the operation at the time of reproduction will be described.
[0020]
Data recorded on the recording medium 409 is read by the recording / reading unit 408, and is written to the memory 405 via the DMA controller 404. The control at this time is also performed by the control unit 403, and is performed under the control of the DMA controller control unit 504 of the CPU 505 and the recording and reading control unit 507.
[0021]
Next, the header information is read from the memory 405 to the CPU 505 of the control unit 403, and the recorded shooting start time and the value of the normal shooting flag for normal shooting are read.
[0022]
The image data written to the memory 405 is sent from the memory 405 to the compression / decompression unit 407 via the DMA controller 404, subjected to decompression processing, and written again to the memory 405. At this time, the time stamp information of the decompressed image is sent from the image compression / decompression unit 407 to the CPU 505 of the control unit 403. The control at this time is also performed by the control unit 403, and is performed by controlling the DMA controller control unit 504 and the image compression / decompression control unit 507 of the CPU 505.
[0023]
At this time, the time stamp information of the decompressed image is passed from the image compression / decompression unit 407 to the control device 403. The control device 403 writes the time stamp into a memory in a format that can be displayed on the OSD. Next, the decompressed data and the OSD display data from the memory 405 are sent to the display 411 via the DMA controller 404 and the display interface 410 for display.
[0024]
FIG. 8A is a flowchart at the time of photographing. The user selects normal photographing or interval photographing (step S601), and performs recording in accordance with the selection. In normal photographing, the photographing start time is recorded in the header area (step S602), and recorded at the frame rate (number of images / second) as normal photographing (step S603).
[0025]
In the interval shooting, the shooting start time is recorded in the header area (step S604), and is recorded according to a value selected by the user from among several setting modes (step S605). For example, when the user selects the 10 × mode, shooting is performed so that 10 seconds during shooting is 1 second during playback. At this time, the number of frames in the reproduction mode is set to be the same as the number of frames in normal shooting. Therefore, if the number of frames in the normal mode is 10 frames / second, shooting is performed at an interval of one frame per second.
[0026]
FIG. 8B is a flowchart of a process at the time of reproduction. At the time of reproduction, a time stamp is read, and reproduction is performed according to the time (step S606). At the same time, the time stamp is displayed (step S607). Then, this process is repeated until the end of the moving image reproduction (step S608).
[0027]
FIG. 9 shows an outline of an ASF data format recorded on a recording medium.
[0028]
In the ASF format, as shown in the figure, first, there is a header area 701, then a time stamp 702, and then a stream 703 of an image to be displayed at that time.
[0029]
The shooting start time is recorded in the header area 701, and is added to the head of the file at the time of recording. The time stamp 702 is used at the time of reproduction, and the time at the time of reproduction is recorded. According to this time, the moving image recorded after it is reproduced.
[0030]
Therefore, in the case of normal shooting, this time scale is the same as the time scale at the time of shooting, and therefore, by displaying this time stamp, the time display 801 from the start of reproduction as shown in FIG. 10 is possible. . However, the actual time (date, time) is not recorded in the time stamp, and the real time display cannot be performed.
[0031]
Further, in the display of an apparatus conforming to the ASF format, although not used for actual display, even if an attempt is made to display in real time using the shooting start time data in the header area, the shooting start time Can be displayed but not in real time.
[0032]
Also, when playing back interval shooting such as one shot per 10 seconds or one shot per minute, if the time is displayed according to this time scale, even if it takes several hours to shoot, the time scale during playback Is displayed. For this reason, it is not possible to know the time at which the actually photographed event occurred.
[0033]
[Problems to be solved by the invention]
Conventionally, when displaying time during playback with a video camera conforming to the ASF format, the time stamp in the format is used as it is, but in this method, the time scale during playback and the time scale during shooting are different. However, only the playback time from the start of playback is displayed. Therefore, there is a problem in that a person who views the reproduced image does not display the time at which the actually photographed event occurred.
[0034]
In addition, when a time stamp is displayed on an image taken in interval shooting, the playback time scale differs from the time scale at the time of shooting, so that the time at which the actual shooting event occurred is displayed and not displayed. there were.
[0035]
The present invention has been made in view of the above problems, and provides an image display method that solves the problem.
[0037]
[Means for Solving the Problems]
The present inventionA shooting start time is recorded in a header area, a time stamp is recorded after the header area, a flag for normal photography is recorded in the header area during normal photography, and a time coefficient of interval photography is recorded in the header area during interval photography. An image display device of a video camera conforming to the ASF format in which setting information indicatingEquipped with a judgment means for judging whether it is normal shooting or interval shooting,During playback of normal shooting, the shooting start time is added to the time stamp, and during playback of interval shooting, the shooting start time is added to the time stamp multiplied by the setting information,The intervalDisplay the actual time when shootingIt is characterized by the following.
[0038]
The present inventionA shooting start time is recorded in a header area, a time stamp is recorded after the header area, a flag for normal photography is recorded in the header area during normal photography, and a time coefficient of interval photography is recorded in the header area during interval photography. An image display device of a video camera conforming to the ASF format in which setting information indicatingEquipped with a judgment means for judging whether it is normal shooting or interval shooting,During playback of normal shooting, the shooting start time is added to the time stamp, and during playback of interval shooting, the shooting start time is added to the time stamp multiplied by the setting information,The intervalNotify the actual time when shootingIt is characterized by the following.
[0039]
The present inventionA shooting start time is recorded in a header area, a time stamp is recorded after the header area, a flag for normal photography is recorded in the header area during normal photography, and a time coefficient of interval photography is recorded in the header area during interval photography. Is recorded, and setting information indicatingJudge whether it is normal shooting or interval shooting,At the time of playback of normal shooting, the shooting start time is added to the timestamp. At the time of playback of interval shooting, the shooting start time is added to the timestamp multiplied by the setting information. An image display device of a moving image camera conforming to an ASF format for displaying time,intervalIt is possible to display both the real time display at the time of shooting and the time display from the start of reproduction by the time stamp, or two displays, one display.It is characterized by the following.
[0040]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a functional block diagram of a control unit 100 of a video camera conforming to the ASF format of the present invention. FIG. 2 is a flowchart of processing during normal shooting, interval shooting, and playback, and FIG. FIG. 2B is a flowchart of a process at the time of image capturing, FIG. 2B is a flowchart of a process at the time of reproduction, FIG. 3 is a diagram showing a data format recorded on a recording medium, and FIG. FIG. 5 is a block diagram showing a configuration of a video camera conforming to the ASF format of the present invention.
[0041]
The configuration of the moving image camera of the present invention is different from the conventional configuration in that the conventional control unit 403 is replaced with a new control unit 100, and the other configurations are the same.
[0042]
With reference to FIG. 1, a control unit 100 of the present invention includes a header creation unit 101 for creating a header, a signal processing control unit 102 for controlling a signal processing unit 402, a display IF control unit 103 for controlling a display unit IF 410, DMA controller control section 104 for controlling DMA controller 404; CPU 105 for controlling control section 100 as a whole; recording / reading control section 106 for controlling recording / reading section 408; image compression / decompression control section 107 for controlling image compression / decompression length section 407 , A user interface control unit 108 for controlling a user interface 406, a program memory 109, and a real time calculation unit 110 for calculating a real time at the time of reproduction.
[0043]
Here, the signal processing control unit 102, the display IF control unit 103, the DMA controller control unit 104, the recording / reading control unit 106, the image compression / decompression control unit 107, and the user interface control unit 108 have the same functions as in the related art.
[0044]
Next, the operation will be described with reference to FIGS.
[0045]
At the time of shooting, normal shooting and interval shooting are selected by a user (not shown), and the selected data is input to the CPU 105 via the user interface 406 and the user interface control unit 108 provided in the control unit 100. Then, shooting is performed based on the input data.
[0046]
First, an optical signal of a photographed subject (not shown) is input to an image input unit 401, photoelectrically converted into an analog video signal, subjected to AGC or the like, and output to a signal processing unit 402.
[0047]
The video signal input to the signal processing unit 402 is A / D converted and converted into a digital signal, and is also subjected to processing such as gamma correction, filtering, and edge enhancement processing, so that Y (luminance) and U (red (Color difference) and V (blue color difference) signals are generated.
[0048]
The control unit 100 controls the signal processing control unit 102 and the DMA controller control unit 104 based on the program in the program memory 109 by the CPU 105 provided therein, and transmits the generated Y, U, and V signals through the DMA controller 104. It is stored in the memory 405.
[0049]
Next, the stored digital video signal is read out to the image compression / decompression unit 407 via the DMA controller 404 and subjected to compression processing. This is because the CPU 105 controls the DMA controller control unit 104 to control the DMA controller 404, and the CPU 105 issues a compression command to the image compression / decompression unit 407 via the image compression / decompression control unit 107. Is
[0050]
The time stamp is added by the image compression / expansion unit 407. The control device 100 and the image compression / expansion unit 407 exchange control signals such as start of compression / expansion and response signals such as end of compression / expansion.
[0051]
The data subjected to the compression processing is temporarily stored in the memory 405, added with header information generated by the header generation unit 101 of the control unit 100 according to the format, sent to the recording / reading device 408, and recorded on the recording medium 409. .
[0052]
The control at this time is also performed by the control unit 100, and is performed under the control of the image compression / decompression control unit 107 of the CPU 105, the DMA controller control unit 104, the header generation unit 101, and the recording / reading control unit 107. The recording / reading device 408 notifies the recording / reading control unit 107 of data such as an end.
[0053]
At this time, as shown in FIG. 3, the photographing start time is recorded in the header information, and setting information (time coefficient) from the user is recorded in the case of interval photographing, and a flag indicating the setting information is recorded in the case of normal photographing. The setting information (time coefficient) recorded at the time of interval shooting is a value such as 10 times, 40 times, 100 times, etc., which are 10 seconds for 1 second, 40 seconds for 1 second, and 100 seconds for 1 second. This indicates that the mode is a playback mode.
[0054]
In the case of long moving image recording, compression is performed several times, and when recording on a recording medium, it is recorded as one file. Therefore, the header is added only at the first compression when recording is started. At the same time, the display interface (IF) 410 is controlled by the CPU 105 provided inside the control device 100 controlling the display IF control unit 103, and the image on the memory 405 fetched from the signal processing unit 402 is displayed on the display interface (IF). The information is displayed on the display 411 via the (IF) 410.
[0055]
Next, the operation at the time of reproduction will be described.
[0056]
Data recorded on the recording medium 409 is read by the recording / reading unit 408, and is written to the memory 405 via the DMA controller 404. The control at this time is also performed by the control unit 100, and is performed under the control of the DMA controller control unit 104 and the recording / reading control unit 106 of the CPU 105.
[0057]
Next, the header information is read from the data written in the memory 405 into the real time calculation unit 110 via the CPU 105 of the control unit 100, and the recorded shooting start time and 10 times in the case of interval shooting, The setting information such as 40 times and 100 times is read, and the value of the normal shooting flag is read in the case of normal shooting.
[0058]
The image data written to the memory 405 is sent from the memory 405 to the compression / decompression unit 407 via the DMA controller 404, subjected to decompression processing, and written again to the memory 405. At this time, the time stamp information of the decompressed image is sent from the image compression / decompression unit 407 to the real time calculation unit 110 via the CPU 105 of the control unit 100. The control at this time is also performed by the control unit 100, and is performed by controlling the DMA controller control unit 104, the image compression / decompression control unit 107, and the real time operation unit 110 of the CPU 105.
[0059]
In the case of interval shooting, the control device 100 calculates the real time by multiplying the time stamp by the setting information and adding the shooting start time by the real time calculation unit 110. In the case of normal shooting, the actual time is calculated by adding the shooting start time to the time stamp. Then, the actual time and the time stamp information are written in the memory 405 in the form of OSDC display data as it is. By doing so, both the time from the start of reproduction and the actual time can be displayed.
[0060]
Also, if the OSDC data format is written in the memory so that one of them is erased by the user's selection data sent via the user interface 406, the user interface control unit 109, the CPU 105, the DMA controller control unit 104, and the DMA controller 404, , Can be changed so that only one of them is displayed.
[0061]
Thereafter, the decompression result in the memory 405 and the OSD display data are sent to the display interface 410 via the DMA controller 404, so that the display 411 displays the playback moving image, the time from the playback start, and the actual time. This control is also performed by the control unit 100, and is performed by controlling the CPU 105 to control the DMA controller control unit 104 and the display IF control unit 103.
[0062]
FIG. 2A is a processing flow at the time of photographing. When normal photographing is selected (step S201), a normal photographing flag and a photographing start time are recorded in a header area (step S202), and normal photographing is performed. Perform (Step S203). When the interval photographing is selected (step S201), the recording of the time coefficient and the photographing start time are recorded (step S204), and the interval photographing is performed. In the above example, there are 10 ×, 40 ×, and 100 × interval shooting modes. In this case, the data to be recorded are 10, 40, and 100, respectively.
[0063]
FIG. 2B shows a processing flow at the time of reproduction. When the reproduction is started, first, the setting information is checked to determine whether or not it is the interval shooting (step S206). In the case of interval shooting, the setting information includes numerals such as time coefficients 10, 40, and 100 as in the above example.
[0064]
If this is the normal shooting flag, it is determined that the shooting is not interval shooting (step S206), the compressed image is expanded (step S207), and the shooting start time is added to the time stamp (step S208) to calculate the actual time. I do. Then, the time stamp is displayed as the time from the reproduction start, and the calculation result is displayed as the actual time. If it is determined that the interval shooting is performed (step S206), the compressed image is expanded (step S211), and each time the time stamp is read, the time stamp is multiplied by the time coefficient in the setting information, and the shooting start time is added. The calculation is performed (step S212). Then, the time stamp is displayed as it is as the reproduction time, and at the same time, the result of the calculated actual time is displayed (step S213). Each process is repeated until it ends (step S210, step S214).
[0065]
FIG. 3 is a diagram showing a data format recorded on the recording medium 409. Reference numeral 301 denotes a header area, in which a photographing start time and setting information (time coefficient) according to the present invention which are normally recorded are recorded in a part of the header area. Is done. 302 is a time stamp area, and 303 is a frame image data area.
[0066]
FIG. 4 shows a display method according to the present invention, in which a reproduction time display 802 from the start of reproduction and a real time display 803 at the time of shooting can be displayed.
[0067]
In the above description, the actual time is displayed. However, instead of the display, the notification may be made by voice or the like.
[0068]
As described above, the present invention is configured so that the real time can be displayed in the normal shooting and the interval shooting in the reproduction of the moving image in the ASF format.
[0069]
When reproducing a normally shot image, the actual time is obtained by adding the time stamp value to the shooting start time in the header area of the ASF format, and this is displayed.
[0070]
Also, when displaying an image captured by interval shooting, the time stamp is multiplied by the setting information (time coefficient) recorded in the header area in advance during interval shooting, and the shooting start time is added. The actual time is obtained and displayed. As a result, the real time can be displayed on the display, and the viewer of the reproduced image can accurately grasp the time at which the subject has changed.
[0072]
【The invention's effect】
Of the present inventionAccording to the image display device, a person who reproduces an image normally recorded and recorded in the ASF format and an image recorded by interval photography and records can know the actual time at the time of photographing, and the time when the subject changes. It is possible to realize an image display device that can reproduce data capable of accurately grasping and can display the actual time at the time of shooting.
[0073]
Of the present inventionAccording to the image display device, a person who reproduces an image normally recorded and recorded in the ASF format and an image recorded by interval photography and records can know the actual time at the time of photographing, and the time when the subject changes. It is possible to realize an image display device that can reproduce data capable of accurately grasping and can notify the actual time at the time of shooting.
[0074]
Of the present inventionAccording to the image display device, a person who reproduces an image normally recorded and recorded in the ASF format and an image recorded by interval photography and records can know the actual time at the time of photographing, and the time when the subject changes. Thus, it is possible to realize an image display device that reproduces data that can accurately grasp the image, and can display both the actual time at the time of shooting and the time display from the start of reproduction, or two displays.
[Brief description of the drawings]
FIG. 1 is a functional block diagram showing a configuration of a control unit of a moving image camera conforming to the ASF format of the present invention.
FIGS. 2A and 2B are flowcharts of processing during normal shooting, interval shooting, and playback according to the present invention. FIG. 2A is a flowchart of processing during shooting, and FIG. 2B is a flowchart of processing during playback. FIG.
FIG. 3 is a diagram showing a data format recorded on a recording medium of the present invention.
FIG. 4 is a diagram showing a display of the present invention.
FIG. 5 is a block diagram showing a configuration of a moving image camera according to the ASF format of the present invention.
FIG. 6 is a block diagram showing a configuration of a conventional moving image camera conforming to the ASF format.
FIG. 7 is a functional block diagram showing a configuration of a control unit of a moving image camera compliant with the conventional ASF format.
8A and 8B are flow charts of conventional processing at the time of normal shooting, at the time of interval shooting, and at the time of reproduction, FIG. 8A is a processing flowchart at the time of shooting, and FIG. It is.
FIG. 9 is a diagram showing a data format recorded on a conventional recording medium.
FIG. 10 is a diagram showing a conventional display.
[Explanation of symbols]
100 control unit
101 Header generation unit
102 signal processing controller
103 Display IF control unit
104 DMA controller control unit
105 CPU
106 Recording / reading control unit
107 Image compression / decompression controller
108 Program memory
109 User interface control unit
110 Real Time Operation Unit

Claims (3)

A shooting start time is recorded in a header area, a time stamp is recorded after the header area, a flag for normal photography is recorded in the header area during normal photography, and a time coefficient of interval photography is recorded in the header area during interval photography. An image display device of a video camera conforming to the ASF format in which setting information indicating
Equipped with a judgment means for judging whether it is normal shooting or interval shooting,
Reproducing the normal shooting, the adding the imaging start time in the time stamp, the time of reproduction of the interval shooting, adding the shooting start time obtained by multiplying the setting information to the time stamp, when the interval shooting An image display device for displaying the actual time of the image. A shooting start time is recorded in a header area, a time stamp is recorded after the header area, a flag for normal photography is recorded in the header area during normal photography, and a time coefficient of interval photography is recorded in the header area during interval photography. An image display device of a video camera conforming to the ASF format in which setting information indicating
Equipped with a judgment means for judging whether it is normal shooting or interval shooting,
Reproducing the normal shooting, the adding the imaging start time in the time stamp, the time of reproduction of the interval shooting, adding the shooting start time obtained by multiplying the setting information to the time stamp, when the interval shooting An image display device for notifying the actual time of the image. A shooting start time is recorded in a header area, a time stamp is recorded after the header area, a flag for normal photography is recorded in the header area during normal photography, and a time coefficient of interval photography is recorded in the header area during interval photography. The setting information indicating the normal shooting or the interval shooting is recorded.When playing back the normal shooting, the shooting start time is added to the time stamp.When playing back the interval shooting, the time stamp is added to the time stamp. An image display device of a video camera conforming to the ASF format for adding the shooting start time to a value obtained by multiplying setting information and displaying an actual time at the time of shooting,
An image display device, wherein both display of real time display at the time of the interval shooting and time display from the reproduction start by the time stamp or two displays of a single display are possible.

Images