JP3692150B2 - Video tape recorder device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a video tape recorder which records and reproduces time information indicating recording time of video information and audio information on a video tape in addition to video information and audio information.
[0002]
[Prior art]
There is a remarkable spread of video tape recorders today, and video tape recorders having various functions are widespread.
Among such video tape recorders, there is known a video tape recorder which records video information, audio information, and video marker information, which is information indicating the recording date and time when the video information and audio information are recorded, as recording information. It has been.
[0003]
In a video tape recorder capable of recording the video marker information, date / time information indicating the recording date / time is supplied to a system controller from a preset timer. In the recording mode, the system controller forms video marker information from the date and time information, supplies it to the video marker processing circuit, and controls the running system to run the video tape at a standard speed. The video marker processing circuit supplies the video marker information at a predetermined timing to a recording head to which the video information and audio information are supplied. The recording head is provided side by side with, for example, a reproducing head, and is a so-called rotating head. The recording head obliquely records the video information, audio information, and video marker information at a predetermined angle on a video tape that is controlled to run at the standard speed to form a recording track.
[0004]
Thus, the video information, audio information, and video marker information recorded on the video tape are controlled by the system controller so that the traveling system has a standard speed in the playback mode as in the recording mode. It is reproduced by the reproducing head of the rotating head.
The video information, audio information, and video marker information reproduced by the reproducing head are supplied to the video marker processing circuit. The video marker processing circuit separates and outputs video information, audio information, and video marker information supplied from the playback head when in the playback mode.
[0005]
The audio information output from the video marker processing circuit is output after being subjected to predetermined audio information processing, and is supplied to an external device such as a speaker device and pronounced.
The video information output from the video marker processing circuit is subjected to predetermined video information processing and output, and is supplied to and displayed on an external device such as a monitor device.
[0006]
The video marker information output from the video marker processing circuit is supplied to the system controller. The system controller forms date and time information according to the video marker information and supplies it to, for example, a liquid crystal display (LCD) provided in the video tape recorder device. The LCD displays date / time information from the system controller.
[0007]
As a result, the date and time when the video information and audio information are recorded is displayed on the LCD.
[0008]
Here, when the frame advance mode is designated, the video tape recorder device controls the recording system (video information, audio information, and video marker) while controlling the traveling system to repeat traveling and stopping at predetermined time intervals. Information). Therefore, an image that moves at the predetermined time interval is displayed on the monitor device.
[0009]
Note that the audio information reproduced in the frame advance mode is not output.
[0010]
[Problems to be solved by the invention]
However, when the frame advance mode is designated, the conventional video tape recorder described above reproduces the video marker information on the recording track because the reproducing head accurately traces the recording track during the traveling. The date and time information can be displayed on the LCD. However, when the stop time is reached, the recording information is recorded obliquely on the videotape, so that the reproducing head crawls into a plurality of recording tracks. There is a problem that tracing is performed, and the video marker information is not reproduced and the date and time information is not displayed.
[0011]
In addition, even when the video marker information is reproduced at the time of the stop, the reproduction head crawls into a plurality of recording tracks and performs tracing, so that the video displayed on the monitor device and the LCD are displayed. There was a problem that the date and time information does not match.
[0012]
Further, the conventional video tape recorder apparatus has the same problem as the above problem not only in the frame advance mode but also in the still image mode that can be considered as a single frame advance.
[0013]
The present invention has been made in view of the above-described problems, and is a video tape recorder that can reliably display accurate date and time information that matches video information in the frame advance mode and the still image mode. For the purpose of provision.
[0014]
[Means for Solving the Problems]
According to the present invention, at least video information displayed on a monitor device and video marker information which is information indicating a recording time of the video information are obliquely recorded on a video tape as recording information, and the video marker information is at a predetermined position in the longitudinal direction. A video tape recorder apparatus for forming and reproducing a recording track so as to be recorded at a position different from the video information, and reproducing means for reproducing and outputting the recording information recorded on the video tape; Video marker processing means for detecting and outputting the video marker information out of recorded information from the reproducing means, a running system for controlling the running state of the video tape, and video marker information from the video marker processing means. Time information is formed in response, and the control means for outputting the time information and the video information in accordance with the time information from the control means. Display means for displaying a recording time, and the control means designates a frame advance mode which is a mode for reproducing the recorded information while controlling the traveling system to repeat traveling and stopping at predetermined time intervals. In this case, the video marker information after the control means detects immediately before the stop is not used, and the traveling system is stopped and reproduced in the traveling state from the recording track before the recording track displayed on the monitor device. Using the video marker information, time information corresponding to the video information of the recording track displayed on the monitor device is formed and supplied to the display means.
[0016]
[Action]
In the video tape recorder apparatus according to the present invention, the control means stops when a frame advance mode is designated, which is a mode for reproducing recorded information while controlling the running system to repeat running and stopping at predetermined time intervals. The video marker information after the control means detects immediately before is not used, and the video marker information reproduced in the running state from the recording track before the recording track displayed on the monitor device with the running system stopped is used. The time information corresponding to the video information of the recording track displayed on the monitor device is formed by the control means and supplied to the display means.
[0017]
In other words, when the traveling system in the frame advance mode stops, the time information is not displayed using the video marker information reproduced in an inaccurate tracking state, but the accurate tracking supplied during the traveling is performed. From the video marker information reproduced in the state, time information that will be formed from the video marker information recorded on the recording track at the actual stop position is formed and displayed on the display means.
[0018]
【Example】
Hereinafter, preferred embodiments of a video tape recorder apparatus according to the present invention will be described with reference to the drawings.
The video tape recorder apparatus according to the present embodiment is a video tape recorder apparatus that performs so-called oblique recording and reproduction using video information, audio information, and video marker information indicating the date and time when the video information and audio information are recorded as recording information. 1, a timer 1 that counts recording date and time and outputs date information, and an operation unit 2 provided with operation keys and the like for specifying a recording mode, a reproduction mode, a frame advance mode, and the like, which will be described later, The recording date and time formed according to the video marker information, for example, a display unit (LCD) 3 for displaying liquid crystal, the traveling system 5 for controlling the traveling of the video tape 4 according to each mode, and the recording on the video tape 4 A recording head 6 for recording information, a reproducing head 7 for reproducing the recording information recorded on the video tape 4, and an RF amplifier for amplifying the recording information. 8, an information processing circuit 9 for performing predetermined information processing on the recorded information, a video marker processing circuit 10 as video marker processing means for performing predetermined information processing on the video marker information, and the entire video tape recorder apparatus The system controller 11 is a control means for performing the above control.
[0019]
The reproducing head 7, the RF amplifier 8, and the information processing circuit 9 constitute reproducing means.
[0020]
Next, the operation of the video tape recorder apparatus according to the present embodiment having the configuration as shown in FIG. 1 will be described.
First, a description will be given of a recording mode in which the recording information (video information, audio information, and video marker information) is recorded on the video tape 4.
In order to designate this recording mode, a recording mode designation key (not shown) of the operation unit 2 is turned on. When the recording mode designation key is turned on, recording mode designation information is supplied from the operation unit 2 to the system controller 11.
[0021]
When the recording mode designation information is supplied, the system controller 11 controls the running system 5 so that the video tape 4 is driven to run at a standard speed.
The timer 1 is set in advance to indicate the current date and time, and information indicating the current date and time is supplied to the system controller 11 as date / time information. When in the recording mode, the system controller 11 forms video marker information corresponding to the date and time information supplied from the timer 1 and supplies it to the information processing circuit 9 via the video marker processing circuit 10.
[0022]
In addition to the video marker information, the information processing circuit 9 is supplied with audio information via the audio input terminal 12 and video information via the video input terminal 13. The information processing circuit 9 outputs the audio information, video information, and video marker information at predetermined timings to be described later. The audio information, video information, and video marker information output from the information processing circuit 9 at a predetermined timing are each amplified by the RF amplifier 8 with a predetermined gain, and the recording head 6 provided in a so-called rotary head. To be supplied.
[0023]
The recording head 6 is rotationally controlled by the system controller 11 so as to have a predetermined rotational speed, and the recording information, which is the audio information, video information, and video marker information supplied from the RF amplifier 8, is recorded on the video. Recording is performed obliquely on the tape 4 at a predetermined angle to form a recording track.
[0024]
The recording format of the recording information recorded on the video tape 4 is such that one recording track is as shown in FIG.
That is, as shown in FIG. 2A, the audio information recording area PCM and the video information recording area VD are formed in the longitudinal direction of the recording track 20. The audio information pcm is recorded up to 3.0H (horizontal period) before the boundary G between the audio information recording area PCM and the video information recording area VD, and the video information vd is recorded in the audio information recording area PCM and the video information. The recording starts from 3.8H after the boundary G of the recording area VD. The video marker information ma is recorded from a position where 2.65H time has elapsed since the end of recording of the audio information pcm, and is recorded from this point to a position where 1.5H time has elapsed. Has been.
[0025]
Specifically, the video marker information ma has header information recorded up to a position where a time of 1.26H has elapsed from the beginning as shown in FIG. As the header information, search information for cueing or the like is recorded as necessary.
Further, the remaining 0.24H portion following the header information of the video marker information ma is allocated to 40 bits shown in FIG. 2C, and the date / time information such as the recording date and recording time of the recording information is recorded. It is recorded.
[0026]
Next, a description will be given of a playback mode in which the recorded information recorded obliquely on the video tape 4 is reproduced.
In order to designate this reproduction mode, a reproduction mode designation key (not shown) of the operation unit 2 is turned on. When the reproduction mode designation key is turned on, reproduction mode designation information is supplied from the operation unit 2 to the system controller 11.
[0027]
When the reproduction mode designation information is supplied, the system controller 11 controls the running system 5 so that the video tape 4 is driven to run at a standard speed. Thereby, the recording track on which the recording information is recorded is traced by the reproducing head 7 provided in the rotating head, and the recording information is reproduced. The reproduced recorded information is amplified with a predetermined gain by the RF amplifier 8 and supplied to the information processing circuit 9.
[0028]
In the reproduction mode, the information processing circuit 9 separates the recording information supplied from the RF amplifier 8 into audio information, video information, and video marker information. Then, the audio information is subjected to predetermined audio processing and output via the audio output terminal 14, the video information is subjected to predetermined video processing and output via the video output terminal 15, and the video marker information is This is supplied to the system controller 11 through the video marker information processing circuit 10. The audio information is supplied to a speaker device (not shown) or the like, for example. The video information is supplied and displayed on a monitor device (not shown), for example.
[0029]
When the system controller 11 enters the reproduction mode, the window information ea as shown in FIG. 2D is formed and supplied to the information processing circuit 9 in order to separate the video marker information. The window information ea shown in FIG. 2D is supplied to the information processing circuit 9 at a timing such that the window information ea rises before and after the video marker information ma shown in FIG. The information processing circuit 9 extracts the video marker information ma from the recording information by taking in the recording information when the window information ea supplied from the system controller 11 is at a high level. The data is supplied to the system controller 11 via the processing circuit 10.
[0030]
The system controller 11 forms date / time information indicating the recording date / time of the recording information from the video marker information, and supplies the date / time information to the display unit 3.
As a result, date and time information indicating the recording date and time of the reproduced recorded information is displayed on the display unit 3.
[0031]
Next, a description will be given of the frame advance mode, which is a mode for reproducing the recorded information recorded on the video tape 4 while controlling the traveling system 5 to repeat traveling and stopping at predetermined time intervals. .
The operation of the video tape recorder apparatus in the frame advance mode is as shown in the flowchart of FIG.
[0032]
That is, the video tape recorder apparatus is configured to perform the operation of the frame advance mode when the frame advance mode is designated during the playback mode, for example. For this reason, the flowchart shown in FIG. 3 is started upon entering the reproduction mode, and proceeds to step S1.
The frame advance mode does not need to be specified during the playback mode, and may be specified directly.
[0033]
In order to designate the frame advance mode, a frame advance mode designation key (not shown) of the operation unit 2 is turned on. When the frame advance mode designation key is turned on, the frame advance mode designation information is supplied from the operation unit 2 to the system controller 11.
In step S1, the system controller 11 determines whether or not the frame advance mode is specified by determining the presence or absence of the frame advance mode designation information from the operation unit 2. If YES, the system controller 11 determines whether or not the frame advance mode is designated. The process proceeds to S2, and if NO, the process proceeds to step S6.
[0034]
In step S6, since the frame advance mode is not specified, the system controller 11 controls the video tape recorder so as to perform the operation in the playback mode, and the process returns to step S1. As a result, date and time information corresponding to the video marker information reproduced from the video tape 4 driven to travel at the normal speed is displayed on the display unit 3.
[0035]
When the system controller 11 detects designation of the frame advance mode in step S1, the system controller 11 causes the video tape 4 to repeatedly run and stop at a standard speed at predetermined time intervals in step S2. In addition to controlling the traveling system 5, the reproducing head 7 is controlled so as to reproduce recorded information from the video tape 4 that is repeatedly run and stopped at the standard speed, and the process proceeds to step S 3.
[0036]
The reproducing head 7 traces the recording track on the video tape 4 not only while the video tape 4 is running but also when it is stopped, and reproduces the recorded information.
[0037]
In step S3, the system controller 11 determines whether or not it is the stop of the running and stopping control of the traveling system 5. If YES, the system controller 11 proceeds to step S4, and if NO, step S7. Proceed to
This determination can be easily performed because the system controller 11 counts and controls the time so that the traveling and stopping are repeated at predetermined time intervals.
[0038]
In step S7, the system controller 11 determines whether or not it is immediately before the stop control. If NO, the process proceeds to step S8, and if YES, the process proceeds to step S9.
[0039]
In step S8, since the vehicle is running and the reproducing head 7 can correctly trace the recording track, the system controller 11 obtains the date / time information from the video marker information currently reproduced and supplied. Then, proceed to step S4.
[0040]
Here, since the recording information (video information, audio information and video marker information) is recorded obliquely on the video tape, when the frame advance mode is stopped, the reproducing head 7 is divided into a plurality of recording tracks. Will be traced. For this reason, the video marker information may not be reproduced, and even if it is reproduced, the video displayed on the monitor device and the date / time information displayed on the display unit 3 do not match. .
[0041]
For this reason, in step S9, when the system controller 11 detects that the traveling system 5 is about to stop, the date / time information is not formed from the inaccurate video marker information reproduced at the time of the stop. Like that. Then, from the video marker information reproduced at the time of traveling from the recording track before a predetermined track of the recording track on the video tape 4 traced by the reproducing head 7 when the traveling system 5 is actually stopped, Date and time information corresponding to the video information of the recording track traced when actually stopped is formed by calculation, and the process returns to step S3. And when the stop of the said traveling system 5 is detected by the said step S3, it will progress to the said step S4.
[0042]
In step S4, the system controller 11 actually stops at the date and time information formed from the currently reproduced video marker information in step S8 or reproduced during the running in step S9. The date and time information formed from the video marker information before a predetermined track of the recording track is displayed on the display unit 3, and the process proceeds to step S5.
[0043]
The date and time information displayed on the display unit 3 at the time of the stop is the video marker information that is formed by the calculation using the video marker information that is actually supplied before the stop recording track by the system controller 11 during the running. Although it corresponds, since the running speed of the video tape 4 is known in advance, the playback and stop times are counted, and the time until the running system 5 actually stops is known. That is, as will be described later, if the recording track on which the video marker information is reproduced is the track immediately before the stop, about one track from the recording track to the track on which the video information that is actually stopped and displayed on the monitor device is recorded. Since it can be regarded as instantaneous from stop control to stop)) from the predetermined track before the video marker information is played back It is possible to form an accurate date and time information that matches a simple calculation for adding a row to date and time information for the number of tracks on the video information recording tracks of the stop position. For this reason, accurate date and time information can be reliably displayed on the display unit 3.
[0044]
When the system controller 11 stops, the system controller 11 reproduces the date / time information that matches the video information of the recording track at the actual stop position, and the predetermined track of the recording track at the actual stop position reproduced during the travel. Although it was formed using the previous video marker information and displayed on the display unit 3, the date / time information is formed using video marker information reproduced from the recording track immediately before the recording track to be actually stopped. You may do it.
[0045]
In step S5, the system controller 11 determines whether or not the end of the frame advance mode has been designated. If NO, the system controller 11 returns to step S3 and repeats the routine described above. If YES, The video tape recorder apparatus is controlled to end the frame advance mode.
[0046]
As is apparent from the above description, in the video tape recorder apparatus according to the present invention, when the frame advance mode is designated, the system controller 11 causes the reproducing head 7 to be turned on when the traveling system 5 is actually stopped. The date and time according to the video information of the recording track traced when the recording track is actually stopped, from the video marker information reproduced during the running from the recording track preceding the predetermined track of the recording track on the video tape 4 to be traced Stop by simple calculation by forming the information by calculation, or by forming the date and time information using the video marker information reproduced during the running from the recording track immediately before the recording track that actually stops. Accurate date and time information matching the video information of the recording track at the position is formed and displayed on the display unit 3 reliably. Rukoto can.
[0047]
In the description of the above embodiment, in the frame advance mode, the video marker information recorded before a predetermined track of the recording track that actually stops or the recording track immediately before the recording track that actually stops is recorded. The date and time information of the recording track that is actually stopped is formed using the video marker information that is actually stopped, and is supplied to the display unit 3. However, the video in the frame advance mode has a predetermined time interval. Therefore, it is obvious that the present invention can be applied even in the still image mode for displaying the still image, and “normal before the video tape is stopped”. Accurate time information that matches the video information of the actual stop position is formed by calculation from the video marker information reproduced in the correct tracking state and displayed reliably. "That, as long as it does not depart from the gist of the present invention that various modifications are possible as a matter of course.
[0048]
【The invention's effect】
In the video tape recorder apparatus according to the present invention, when the frame feed mode, which is a mode for reproducing recorded information while controlling the running system to repeat running and stopping at a predetermined time interval, is specified, the control means stops The video marker information after the control means detects immediately before is not used, and the video marker information reproduced in the running state from the recording track before the recording track displayed on the monitor device with the running system stopped is used. The time information corresponding to the video information of the recording track displayed on the monitor device is formed by the control means and supplied to the display means.
[0049]
In other words, when the traveling system in the frame advance mode stops, the time information is not displayed using the video marker information reproduced in an inaccurate tracking state, but the accurate tracking supplied during the traveling is performed. The video recorded on the recording track where the traveling system actually stops based on the video marker information reproduced in the state, the traveling speed of the video tape, and the time required for the traveling system to actually stop Since the time information that will be formed from the marker information can be formed and supplied to the display means, the accurate recording time that matches the video information at the stop position can be reliably displayed on the display means. Can do.
[Brief description of the drawings]
FIG. 1 is a block diagram of an embodiment of a video tape recorder apparatus according to the present invention.
FIG. 2 is a schematic diagram for explaining a recording form of video marker information which is information indicating the recording date and time of video information and audio information recorded and reproduced in the video tape recorder apparatus of the embodiment.
FIG. 3 is a flowchart for explaining an operation in a frame advance mode of video marker information in the embodiment.
[Explanation of symbols]
1 ... Timer
2 ..... Operation part
3. Display unit (LCD)
4 ... Video tape
・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Travel system
6: Recording head
7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Playback head
8 ... RF amplifier
9 ... Information processing circuit
10 .... Video marker processing circuit
11 .... System controller
12 .... Voice input terminal
13 .... Video input terminal
14 .... Audio output terminal
15 ... Video output terminal

Claims (1)

At least video information displayed on the monitor device and video marker information which is information indicating the recording time of the video information is obliquely recorded on the video tape as recording information, and the video marker information is at a predetermined position in the longitudinal direction and the video A video tape recorder apparatus that forms and reproduces a recording track so as to be recorded at a position different from information ,
Reproducing means for reproducing and outputting the recorded information recorded on the video tape,
Video marker processing means for detecting and outputting the video marker information out of the recording information from the reproduction means,
A running system for controlling the running state of the video tape;
Control means for forming time information according to the video marker information from the video marker processing means and outputting the time information;
Display means for displaying the recording time of the video information according to the time information from the control means,
When the frame feed mode, which is a mode for reproducing the recorded information, is specified, the control means detects immediately before the stop when the traveling system is controlled to repeat running and stopping at a predetermined time interval. The video marker information is not used, but is displayed on the monitor device using the video marker information reproduced in the running state from the recording track that is a predetermined track before the recording track displayed on the monitor device after the traveling system stops. A video tape recorder characterized in that time information corresponding to video information of a recording track to be recorded is formed and supplied to the display means.

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