JPH11225304A - Video synthesizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the video synthesizer that generates an easy to see synthesized video image regardless of a simple configuration. SOLUTION: After recording a start signal from a processing unit 3 by a video deck 2 at the start of video recoding, the video deck 2 records a video signal from a CCD camera 4. The processing unit stores sequentially data outputted from an ECU 5 to a memory 33. In the case of reproduction, the video deck outputs the signal recorded in a recoding medium 21 to the processing unit. The processing unit displays a video image sent from the video deck and an image of the stored data on a display section 32. When a start signal is detected from the signal outputted from the video deck, data in the data image are advanced in terms of time. Since the video image and the data are displayed on the display section separately, the video image is uneasily seen. Moreover, the video synthesizer can be configured simply only with a conventional video deck and the processing unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video synthesizing apparatus, and more particularly to a video synthesizing apparatus for synthesizing a video and an image indicating data related to the video and displaying the synthesized video.

[0002]

2. Description of the Related Art As an example of the image synthesizing apparatus, an image of an external situation of a vehicle photographed by a CCD camera mounted on the vehicle and an image indicating vehicle data such as an inter-vehicle distance and a vehicle speed are synthesized on the same screen. There is a device to record. FIG. 1 shows a configuration of the above-mentioned conventional video synthesizing apparatus. (A) shows the circuit configuration of the video synthesizing device, and (B) shows its screen.

The device shown in FIG. 1 is mounted on a vehicle. CC
The D camera 4 captures an external situation when the vehicle is running, such as in front of the vehicle. The video signal output from the CCD camera 4 is input to the imposer 9. On the other hand, vehicle data such as the inter-vehicle distance and the vehicle speed when the vehicle is running are input from the ECU 5 to the personal computer 3 every moment. The personal computer 3 converts the sequentially input data into a video signal and outputs the video signal to the imposer 9.

[0004] The imposer 9 combines 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 a video tape by the video deck 2. When the video recorded on the video tape is played back, as shown in FIG.
At the top, data 81 corresponding to the video is displayed on the video captured by the CCD camera 4. This image is used for analysis in a vehicle running test or for investigating the cause of a vehicle accident.

[0005]

In the above-mentioned conventional video synthesizing apparatus, since the data is superimposed on the video, it is difficult to view the video. In addition, since an imposer is required, the size and cost of the apparatus are increased. SUMMARY OF THE INVENTION It is an object of the present invention to provide a video synthesizing apparatus that creates an easy-to-view synthesized video with a simple apparatus.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object. The video synthesizing device of the present invention records a video signal input at the time of video recording on a recording medium,
A video device for outputting a video signal recorded on a recording medium at the time of reproduction; and a video device connected to the video device for storing data that is sequentially input corresponding to the video signal at the time of recording, and output from the video device at the time of reproduction. A processing device for displaying an image based on the video signal and an image of the stored data on the display unit.

[0007] The processing device outputs a start signal to the video device at the start of recording, and
Means for temporally advancing data in the image of the data when a start signal is extracted from a signal output from the video device, wherein the video device records the start signal input from the processing device on a recording medium Means.

In the video synthesizing apparatus, 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. After recording the start signal on the recording medium, the video device records the sequentially input video signals. At the time of reproduction, the processing device displays an image based on the stored data and a video based on the video signal output from the video device on the same display unit,
When the start signal is detected from the video signal output from the video device, the data in the data image is advanced in time.

According to the video synthesizing apparatus of the present invention, since the video and the data image can be displayed separately during reproduction, it is possible to prevent the video from being covered by the data image and becoming difficult to see. Further, the present invention does not require an importer, and can be realized only with simple devices such as a video device and a processing device. At this time, the reproduction of the video and the reproduction of the data image can be simultaneously started 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] In addition, when recording for a long time, simply synchronizing at the start may cause a difference between a video and a data image. To cope with this, the video synthesizing device of the present invention can output a time code from the processing device at the time of recording, and can record this time code on the recording medium of the video device. At the time of reproduction, the processing device creates a video image according to the time code output from the video device, and performs video synthesis completely synchronized with the video even when recording is performed for a long time.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows a configuration of a video synthesizing device mounted on a vehicle. The video synthesizing apparatus 1 includes a video deck 2 and a personal computer 3. VCR 2
A device having a function of operating according to control signals such as recording, reproduction, and stoppage output from the personal computer 3 is used. A video signal from a CCD camera 4 that captures a situation in front of the vehicle during video recording is input to the video deck 2.

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.
The video signal from the CCD camera 4 and the time code output from the personal computer 3 are recorded on a video tape 21. At the time of reproduction, the VCR 2 sends a start signal, a video signal,
Output time code.

The personal computer 3 constitutes the processing device of the present invention, and comprises a CPU 31, a display unit 32, a memory 33, and a keyboard 34. This PC 3 has EC
From U5, data such as an inter-vehicle distance and a vehicle speed when the vehicle is running are input. At the time of recording, the personal computer 3
Output a recording command and a start signal to
Output time code continuously. At the same time, the memory 33
The time code and the data are sequentially stored.

At the time of reproduction, the personal computer 3 displays an image based on the image signal output from the video deck 2 on the display unit 32. Further, the data stored in the memory 33 is read out and displayed on the same display unit 32. The detailed operation of the video compositing apparatus 1 during video recording will be described with reference to FIG. This operation is performed under the control of the personal computer 3.

The flow shown in FIG. 3 is started by inputting a recording start command from the keyboard 34 of the personal computer 3. In step S11, a start signal to be recorded on the video tape 21 and a signal to cause the VCR 2 to start recording 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. Note that other signals such as an audio signal can be used as the start signal. The VCR 2 starts recording upon receiving the recording start signal, records the erased image on the video tape 21 by the start signal, and
Video signals from the CD camera 4 are sequentially recorded.

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 S13, the personal computer 3 sets the EC
The data and the time code sequentially input from U5 are stored in the memory 33.

In step S14, the process waits for the elapse of 1/30 second. If it is confirmed in step S15 that the stop button has not been pressed, the process returns to step S12, where the video tape 2
1 and the storage of the data and the time code in the memory 33. Note that this 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 with the data image. In addition, the capacity of the memory 33 for storing data can be reduced.

When an instruction to stop recording is input from the keyboard 34, the flow advances from step S15 to step S16 to stop the video deck 2 and stop the processing. Next, the operation during data reproduction will be described with reference to the drawings. FIG.
Shows a screen 61 of the display unit 32 of the personal computer 3 during reproduction. The screen 61 includes an image portion 62 of the CCD camera 1 and a data image 63. In the illustrated example, the data image 63 is displayed as a graph. In addition, it is also possible to display characters and numbers without making a graph.
By separating the video portion 62 and the data image 63 in this manner, the video portion 62 has no overlapping portion, so that the video can be easily viewed.

Further, on the screen 61, a reproduction button mark 64 and a stop button mark 65 are provided to serve as a touch switch. Instead of these, keyboard 3
4 can also be used. Further, the graph portion of the data image 63 is scrolled in the horizontal direction with the passage of time. The current data is specified by the axis 66 fixed on the screen.

FIG. 5 shows the operation at the time of the reproduction initial setting. When a data reproduction start command is input from the keyboard 34, the operation starts. In step S21, data is fetched from the memory 33, a graph is created and displayed on the screen 61 as a data image 63. At this time, in the graph, the first data is made to coincide with the axis 66 indicating the present time.

In step S22, a reproduction start signal is output to the video deck 2 to start reproduction of the video tape 21. The personal computer 3 creates an image from the image signal output from the video deck 2 and displays the image on the image portion 62 of the screen 61. In step S23, when a start signal (screen erase) is detected from the signal output from the video deck 2,
In step S24, a pause signal is output to the video deck 2, and the video deck 2 is set to the standby state. In addition,
At this time, the video tape 21 is displayed on the video portion 62 of the screen 61.
, The video of the next frame recorded in the standby mode can be displayed, and the standby state can be set later.

FIG. 6 shows the operation at the time of reproduction. This operation is started by touching the reproduction mark 64 on the screen 61. In step S31, a reproduction signal is output to the video deck 2, and the video deck 2 starts reproduction. Therefore, the reproduced video is sequentially displayed on the video portion 62 of the screen 61.

In step S32, the time code is extracted from the audio signal of the video signal, and in step S33, the graph in the data display portion 35 is scrolled according to the time code. By the above operation, the image portion 6 of the screen 61
2 displays the situation outside the vehicle captured 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. Further, the video and the data can be completely synchronized by the time code.

FIG. 7 shows the operation during a temporary stop. 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, a still image at the time of the pause is displayed in the image portion 62.

In step S42, scrolling of the data screen 63 is stopped. Therefore, in the data image 63,
When the data corresponding to the image of the image portion 34 is applied to the axis 66, the operation is stopped. After this, the play button mark 64
By pressing, the reproduction operation of FIG. 6 described above is performed.

Although not shown, the VCR 2
In addition, fast forward and rewind can be performed. In this case, the fast forward button mark and the rewind button mark are displayed on the screen 61, and by pressing them, the VCR 2 is caused to perform the respective operations. Then, by extracting the time code from the audio signal and scrolling the data graph, the data scroll is also fast-forwarded and backward-forwarded. Then, by pressing the play button mark at an appropriate time, it is possible to return to the normal play. Or,
By pressing the stop button mark, video and data can be paused.

FIG. 8 shows a flow of an operation for displaying an image at an arbitrary point on the data in the image portion 61. This operation is started by operating the mouse (not shown) to move the cursor 67 on the screen 61 to an arbitrary point in the data and clicking the mouse. In step S51,
The 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.

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, the two are compared, and T2 = T1
A fast forward or rewind command is issued to the video deck 2 so that When T2 = T1 is detected in step S54, the video deck 2 is temporarily stopped at that time. Thereby, the video at the designated time is displayed in the video portion 62,
In the data portion 63, the time point is indicated by an axis 68.

FIG. 9 shows the 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. Data screen 63
The axis 68 indicates the designated time. The video portion 62 displays the video at that time. When characters and numerals are used as the data image, a scale indicating time may be provided on the screen 61.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope recorded in the claims. . For example, in the above-described embodiment, the video deck 2 performs playback and stop under the control of the personal computer 3, but the video deck 2 can be manually operated without performing the control of the personal computer 3.

In this case, at the time of recording, the personal computer 3 outputs only a start signal to be recorded on the video tape 21 and does not output a time code. During playback, the video deck 2 is manually operated to start playback. The personal computer 3 displays the data image by the reproduction initial operation, and when detecting a start signal from the signal output from the VCR 2, starts scrolling the data and displays the video from the VCR 2 in the video portion 62. indicate.

Thus, the starting points of the video and data displayed on the display portion 61 are aligned by the start signal. In this system, a commercially available video deck 2 can be used, so that a simpler device configuration can be achieved. Note that in the case of long-time recording and reproduction, a difference may occur between the video and the data, but in the case of a short time, the effect is small.

[Brief description of the drawings]

FIG. 1 is a diagram showing a circuit configuration and a screen configuration of a conventional video synthesizing apparatus.

FIG. 2 is a diagram showing a configuration of a video compositing apparatus to which the present invention is applied.

FIG. 3 is a flowchart showing the operation of the apparatus shown in FIG. 2 during recording.

FIG. 4 is a view showing a display screen at the time of reproduction of the apparatus of FIG. 2;

FIG. 5 is a flowchart showing the operation of the apparatus shown in FIG. 2 at the time of initial setting of reproduction.

FIG. 6 is a flowchart showing an operation at the time of reproduction of the apparatus of FIG. 2;

FIG. 7 is a flowchart showing an operation of the apparatus shown in FIG. 2 at the time of a temporary stop.

FIG. 8 is a flowchart showing an operation of displaying an image at an arbitrary point on the data of the apparatus of FIG. 2;

FIG. 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 synthesizer 2 ... Video deck 21 ... Video tape 3 ... Personal computer 31 ... CPU 32 ... Display part 33 ... Memory 34 ... Keyboard 4 ... CCD camera 5 ... ECU 61 ... Screen 62 ... Video part 63 ... Data image 64 ... Reproduction Button mark 65 ... Stop button mark 66 ... Current axis 67 ... Cursor 68 ... Specified time axis

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI G11B 27/031 H04N 5/781 510L H04N 5/781 G11B 27/02 B

Claims (3)

[Claims] 1. A video device for recording a video signal input at the time of recording on a recording medium and outputting the video signal recorded on the recording medium at the time of reproduction, the video device being connected to the video device, and A processing device that stores data sequentially input in correspondence with, and displays, on the display unit, an image based on a video signal output from the video device and an image of the stored data during the reproduction. A processing device for outputting a start signal to the video device at the start of the recording; and a data in an image of the data when the start signal is extracted from a signal output from the video device during the reproduction. The video device further comprises means for recording a start signal input from the processing device on the recording medium. Video synthesis device. 2. The video synthesizing device according to claim 1, wherein the processing device stores data sequentially input corresponding to the video signal for each frame time of the video signal. 3. The processing device includes means for outputting a time code to the video device at the time of the recording, and the video device includes means for recording the input time code on the recording medium, 3. The video synthesizing device according to claim 1, wherein the means for temporally advancing the data in the processing device advances the data in accordance with a time code output from the video device.