JP4290238B2 - Video composition apparatus and method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a video synthesizing apparatus and method , and more particularly, to a video synthesizing apparatus and method for synthesizing and displaying a video and an image indicating data related to the video.
[0002]
[Prior art]
As an example of the video composition device, there is a device that synthesizes and records on the same screen a video of the external situation of the vehicle photographed by a CCD camera mounted on the vehicle and an image showing vehicle data such as the inter-vehicle distance and vehicle speed. .
FIG. 1 shows the configuration of the conventional video composition apparatus. (A) shows the circuit configuration of the video composition apparatus, and (B) shows the screen.
[0003]
The apparatus shown in FIG. 1 is mounted on a vehicle. The CCD camera 4 captures an external situation when the vehicle travels such as in front of the vehicle. The video signal output from the CCD camera 4 is input to the impose 9. On the other hand, vehicle data such as an inter-vehicle distance and a vehicle speed when the vehicle is traveling is input from the ECU 5 to the personal computer 3 every moment. The personal computer 3 converts sequentially input data into a video signal and outputs it to the impose 9.
[0004]
The imposer 9 synthesizes and outputs a video signal in which vehicle data is superimposed on the video captured by the CCD camera 4. The synthesized video signal is recorded on the video tape by the video deck 2.
When the video recorded on the video tape is reproduced, as shown in FIG. 1B, on the screen 8, data 81 corresponding to the video is superimposed on the video taken by the CCD camera 4 and displayed. Is done. This video is used for analysis in a running test of the vehicle or investigation of the cause of a vehicle accident.
[0005]
[Problems to be solved by the invention]
Since the conventional video composition apparatus requires an imposer, the apparatus becomes large and expensive.
An object of the present invention is to provide a video composition device that facilitates synchronization of an image and a data image with a simple device.
[0006]
[Means for Solving the Problems]
The present invention has been made to achieve the above object.
The video composition apparatus of the present invention records a video signal input at the time of recording on a recording medium, and outputs a video signal recorded on the recording medium at the time of reproduction, and a video signal connected to the video apparatus, The processing unit is configured to store data sequentially input corresponding to the image data and to display an image based on a video signal output from the video device and an image of the stored data on a display unit during reproduction.
[0007]
Then, the processing device outputs a start signal to the video device at the start of recording, and temporally converts the data in the image of the data when the start signal is extracted from the signal output from the video device during playback. The video apparatus includes means for recording the start signal input from the processing apparatus on a recording medium.
[0008]
In the video composition device, at the start of recording, the processing device outputs a start signal to the video device and then stores sequentially input data in the memory. The video apparatus records the sequentially input video signals after recording the start signal on the recording medium. At the time of reproduction, the processing device displays the image based on the video signal output from the video device and the image based on the stored data on the same display unit, and detects the start signal from the video signal output from the video device. Advance the data in the image in time.
[0009]
According to the video composition device of the present invention, the video and the data image can be displayed separately at the time of reproduction, so that it is possible to prevent the video from being covered with the data image and becoming difficult to see. Further, it can be realized only by a simple device of a video device and a processing device without requiring an imposer. At this time, the reproduction of the video and the reproduction of the data image can be started simultaneously by the start signal recorded on the recording medium of the video device, so that the video and the data image can be easily synchronized.
[0010]
Also, when recording for a long time, there may be a difference between the video and the data image just by synchronizing at the start. The video synthesizing apparatus according to the present invention can cope with this by outputting a time code from the processing apparatus during recording and recording the time code on a recording medium of the video apparatus. At the time of reproduction, the processing device creates a data image in accordance with the time code output from the video device, thereby synthesizing the video in complete synchronization with the video even when the video is recorded for a long time.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows a configuration of a video composition device mounted on a vehicle.
The video composition device 1 includes a video deck 2 and a personal computer 3.
A video deck 2 having a function of operating in accordance with control signals such as recording, reproduction, and stop output from the personal computer 3 is used. A video signal from a CCD camera 4 that captures the situation in front of the vehicle is input to the video deck 2 during recording.
[0012]
At the time of recording, when a command is output from the personal computer 3, the video deck 2 records the start signal output from the personal computer 3 on the video tape 21, and subsequently outputs the video signal from the CCD camera 4 and the personal computer 3. The recorded time code is recorded on the video tape 21. At the time of reproduction, the video deck 2 outputs a start signal, a video signal, and a time code recorded on the video tape 21 to the personal computer 3.
[0013]
The personal computer 3 constitutes the processing apparatus of the present invention, and comprises a CPU 31, a display unit 32, a memory 33, and a keyboard 34. Data such as the inter-vehicle distance and the vehicle speed when the vehicle travels is input to the personal computer 3 from the ECU 5.
At the time of recording, the personal computer 3 outputs a recording command and a start signal to the video deck 2, and then continuously outputs a time code. At the same time, the time code and data are sequentially stored in the memory 33.
[0014]
At the time of reproduction, the personal computer 3 displays an image based on the video signal output from the video deck 2 on the display unit 32. In addition, the data stored in the memory 33 is read and displayed on the same display unit 32.
The detailed operation of the video composition device 1 during recording will be described with reference to FIG. This operation is performed under the control of the personal computer 3.
[0015]
By inputting a recording start command from the keyboard 34 of the personal computer 3, the flow of FIG. 3 is started.
In step S11, a start signal to be recorded on the video tape 21 and a signal to start recording on the video deck 2 are output. In this example, a signal for erasing the entire screen is output as a start signal to be recorded on the video tape 21. As this start signal, other signals such as an audio signal can be used. The video deck 2 starts recording upon receipt of a recording start signal, records an image erased on the video tape 21 by the start signal, and then sequentially records the video signal from the CCD camera 4.
[0016]
In step S12, a time code representing the elapsed time is output to the video deck 2. In the video deck 2, the time code is recorded in the audio portion of the video tape 21.
In step S <b> 13, the personal computer 3 stores the data and time code sequentially input from the ECU 5 in the memory 33.
[0017]
In step S14, the elapse of 1/30 seconds is awaited. If it is confirmed in step S15 that the stop button has not been pressed, the process returns to step S12 to record the time code on the video tape 21, data on the memory 33 and the time Memorize code. The 1/30 second is a time corresponding to the frame interval of the video deck 2. The ECU 5 outputs data at an interval of 1/1000 second, but by synchronizing the output of the time code and the storage of the data with the video frame as in this example, it is easy to synchronize the video and the data image, In addition, the capacity of the memory 33 for storing data can be reduced.
[0018]
When a recording stop command is input from the keyboard 34, the process proceeds from step S15 to step S16, the video deck 2 is stopped, and the process is stopped.
Next, operations during data reproduction will be described with reference to the drawings.
FIG. 4 shows a screen 61 of the display unit 32 of the personal computer 3 during reproduction.
The screen 61 includes a video portion 62 of the CCD camera 1 and a data image 63. In the illustrated example, the data image 63 is displayed in a graph. It is also possible to display with letters and numbers without graphing. In this way, by separating the video portion 62 and the data image 63, there is no overlap in the video portion 62, so that the video can be easily viewed.
[0019]
Further, a play button mark 64 and a stop button mark 65 are provided on the screen 61 to form a touch switch. Instead of these, keys on the keyboard 34 can be used. Further, the graph portion of the data image 63 is scrolled in the horizontal direction as time passes. The current data is specified by the axis 66 fixed on the screen.
[0020]
FIG. 5 shows an operation at the time of initial setting of the reproduction, and the operation starts when a data reproduction start command is input from the keyboard 34.
In step S 21, data is fetched from the memory 33, a graph is created and displayed as a data image 63 on the screen 61. At this time, in the graph, the first data is matched with the axis 66 indicating the current time.
[0021]
In step S22, a playback start signal is output to the video deck 2 to start playback of the video tape 21. The personal computer 3 creates a video from the video signal output from the video deck 2 and displays it on the video portion 62 of the screen 61.
When a start signal (screen deletion) is detected from the signal output from the video deck 2 in step S23, a pause signal is output to the video deck 2 in step S24, and the video deck 2 is set to a standby state. At this time, the video of the next frame recorded on the video tape 21 can be displayed on the video portion 62 of the screen 61, and the standby state can be set later.
[0022]
FIG. 6 shows an operation during reproduction. This operation is started by touching the reproduction mark 64 on the screen 61.
In step S31, a playback signal is output to the video deck 2, and the video deck 2 starts playback. Therefore, the reproduced video is sequentially displayed on the video portion 62 of the screen 61.
[0023]
In step S32, the time code is extracted from the audio signal of the video signal. In step S33, the graph of the data display portion 35 is scrolled according to the time code.
With the above operation, the image portion 62 of the screen 61 displays the situation outside the vehicle imaged by the CCD camera 4, and the vehicle data at that time can be read from the axis 66 representing the current time in the data portion 63. The video and data can be completely synchronized by the time code.
[0024]
FIG. 7 shows the operation at the time of suspension. This operation is started by touching the stop button mark 65 on the screen 61.
In step S41, a stop signal is output to the video deck 2. The video deck 2 pauses and outputs a video signal of the image at that time. On the screen 61, the still image at the time of pause is displayed in the video portion 62.
[0025]
In step S42, the scrolling of the data screen 63 is stopped. Therefore, the data image 63 stops in a state where data corresponding to the video of the video portion 34 is applied to the shaft 66.
Thereafter, the reproduction operation shown in FIG. 6 is performed by pressing the reproduction button mark 64.
[0026]
Although not shown, the video deck 2 can be made to fast forward and rewind. In this case, a fast-forward button mark and a rewind button mark are displayed on the screen 61, and by pressing them, the VCR 2 performs each operation. Then, by extracting the time code from the audio signal and scrolling the data graph, the data scroll is also fast-forwarded and reverse-fed. At an appropriate time, it is possible to return to normal reproduction by pressing the reproduction button mark. Alternatively, the video and data can be paused by pressing a stop button mark.
[0027]
FIG. 8 shows a flow of an operation for displaying a video at an arbitrary time point on the data on the video portion 61. This operation is started by clicking the mouse by setting the cursor 67 on the screen 61 to an arbitrary point in the data by operating the mouse (not shown).
In step S51, scrolling of the graph of the data image 63 is stopped, the cursor 67 is deleted, and an axis 68 (FIG. 9) of a different color parallel to the axis 66 representing the current time is displayed at that position. This axis 68 is an axis representing the designated time point.
[0028]
In step S52, the time code T1 at the cursor position and the time code T2 of the video signal are read. In step S53, both are compared, and a command for fast forward or rewind is issued to the video deck 2 so that T2 = T1. Do. When T2 = T1 is detected in step S54, the video deck 2 is temporarily stopped at that time. As a result, the video at the specified time is displayed in the video portion 62, and the time is displayed on the axis 68 in the data portion 63.
[0029]
FIG. 9 shows a screen 61 at this time. Since this screen is almost the same as the screen shown in FIG. 4 described above, only different points will be described here. In the data screen 63, the designated time point is indicated by an axis 68. The video portion 62 displays the video at that time.
In addition, when using a character and a number as a data image, what is necessary is just to provide the scale which shows time on the screen 61. FIG.
[0030]
As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible within the range recorded on the claim.
For example, in the above-described embodiment, the video deck 2 is played and stopped under the control of the personal computer 3, but the video deck 2 can also be manually operated without being controlled by the personal computer 3.
[0031]
In this case, at the time of recording, only the start signal to be recorded on the video tape 21 is output from the personal computer 3, and the time code is not output. During playback, the video deck 2 is manually operated to start playback. When the personal computer 3 displays the data image by the initial playback operation and detects the start signal from the signal output from the video deck 2, the personal computer 3 starts scrolling the data, and the video from the video deck 2 is displayed in the video portion 62. indicate.
[0032]
Thereby, the start time of the video and data displayed on the display portion 61 is aligned by the start signal. In this method, since a commercially available product can be used as the video deck 2, a simpler device configuration can be obtained. In the case of recording and reproduction for a long time, there may be a difference between video and data, but in the case of a short time, the influence is small.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a circuit configuration and a screen configuration of a conventional video composition device.
FIG. 2 is a diagram showing a configuration of a video composition device to which the present invention is applied.
FIG. 3 is a flowchart showing an operation during recording of the apparatus of FIG. 2;
4 is a diagram showing a display screen during reproduction of the apparatus of FIG. 2;
FIG. 5 is a flowchart showing an operation at the time of playback initial setting of the apparatus of FIG. 2;
6 is a flowchart showing an operation during reproduction of the apparatus of FIG.
7 is a flowchart showing an operation at the time of temporary suspension of the apparatus of FIG. 2;
FIG. 8 is a flowchart showing an operation for displaying an image at an arbitrary time point on the data of the apparatus of FIG. 2;
9 is a diagram showing a screen of a display unit when the operation of FIG. 8 is performed.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Video composition apparatus 2 ... Video deck 21 ... Video tape 3 ... Personal computer 31 ... CPU
32 ... Display unit 33 ... Memory 34 ... Keyboard 4 ... CCD camera 5 ... ECU
61 ... Screen 62 ... Video portion 63 ... Data image 64 ... Play button mark 65 ... Stop button mark 66 ... Current axis 67 ... Cursor 68 ... Designated time axis

Claims (8)

A video device that records a video signal input during recording on a recording medium and outputs the video signal recorded on the recording medium during playback;
Connected to the video apparatus, stores data sequentially input corresponding to the video signal at the time of recording, and stores an image of the video signal output from the video apparatus and an image of the stored data at the time of playback. And a processing device for displaying on the display unit,
The processing device includes means for outputting a start signal to the video device at the start of the recording, and when the start signal is extracted from a signal output from the video device at the time of reproduction, in the image of the data A means to advance the data in time,
The video device includes means for recording a start signal input from the processing device on the recording medium.
A video composition apparatus characterized by the above.   The video synthesizing apparatus according to claim 1, wherein the processing device stores sequentially input data corresponding to the video signal for each frame time of the video signal.   The processing device comprises means for outputting a time code to the video device during the recording, and the video device comprises means for recording the input time code on the recording medium, and the data of the processing device The video synthesizing apparatus according to claim 1, wherein the means for temporally advancing data advances the data in accordance with a time code output from the video apparatus.   The video processing apparatus according to claim 3, wherein the processing device synchronizes a video based on a video signal and an image of the data based on the time code. A video signal recording step for recording a video signal input at the time of video recording on a recording medium;
A data storage step of storing data sequentially input corresponding to the video signal at the time of recording;
A start signal output step of outputting a start signal to the video device at the start of the recording;
A start signal recording step of recording the input start signal on the recording medium;
A video signal output step of outputting a video signal recorded on the recording medium during reproduction;
A display step of displaying, on the display unit, a video based on a video signal output from the video device and an image of the stored data during the reproduction;
A data progression step of temporally advancing data in the image of the data when the start signal is extracted from a signal output from the video device during the reproduction;
Video composition method including   6. The video composition method according to claim 5, wherein the data storage step stores data sequentially input corresponding to the video signal for each frame time of the video signal. The video composition method includes a step of outputting a time code to the video device during the recording,
The data storing step records the input time code on the recording medium,
The video composition method according to claim 6, wherein the data advancing step advances data corresponding to a time code output from the video device. The video synthesizing method according to claim 7, further comprising a step of synchronizing a video based on a video signal and an image of the data based on the time code.

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