JPH07153005A - Tape recorder/reproducer and tape recording/ reproducing method - Google Patents

Abstract

PURPOSE:To always accurately image by joining by automatically retrieving a record end position of a previous time in a tape recorder/reproducing for imaging by joining A tape recording medium such as a video tape, etc. CONSTITUTION:Date generating means 10 records date data for representing a date of a time point on a tapelike recording medium 1 at the time of recording. Discontinuous point retrieving means 11 retrieves, when a record standby is designated externally, presence or absence of a discontinuous point of date data near a recording/reproducing position of the medium 1 at that time point, and it becomes record standby at a discontinuous point detected position in the case of the presence or at an original position in the case of the absence.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape recording / reproducing apparatus and a tape recording / reproducing method for performing continuous shooting using a tape-shaped recording medium such as a video tape.

[0002]

2. Description of the Related Art A conventional technique will be described below by taking a case where a tape-shaped recording medium is a video tape as an example.

One of the editing methods of a video tape recorder (hereinafter abbreviated as VTR) is a joint shot in which a pause operation is used to successively edit and record, and in order to prevent the disturbance of the signal at this joint. On the other hand, there was the following joint shooting method as an expression. In this system, when a recording standby instruction is given during recording, the recording end position signal in which the duty ratio of the control signal is changed is recorded on the control track for a certain period of time, and then the video tape is rewound by a certain amount and then the recording standby state is set. Next, when the recording standby release is instructed in this state, the reproducing operation is started. That is, the capstan is activated and speed servo and tracking servo are applied. The recording end position signal is searched from the time when the tracking is completed. Then, when the recording end position signal is detected, the reproduction state is shifted to the recording standby state. In this way, joint shooting is performed without disturbing the image during reproduction.

Another example is Japanese Patent Laid-Open No. 61-26920.
There was Japanese Patent Laid-Open No. 6- “REC END SEARCH DEVICE FOR VIDEO TAPE”. In this device, a boundary point between a recorded portion and an unrecorded portion of the video tape is detected, this boundary point is determined as a recording end position, and from this point, a joint shot is taken from a position where the video tape is rewound by a predetermined amount. .

[0005]

However, in the above-mentioned continuous shooting method, when a stop instruction is given during recording, for example, when the camera / VTR switch is switched from the camera side to the VTR side during recording, the control track The recording end position signal is not recorded in. For this reason, since the joint photographing operation cannot be performed, there is a possibility that an unrecorded portion may occur at the joint or the image may be disturbed. In particular, in a camera-integrated VTR that records a large number of short scenes, the user often feels uncomfortable if the spaces between the scenes are open. Further, when the stop instruction is given during the recording standby, the recording end position signal is not detected at the next recording, so that there is a problem that the end portion of the previously recorded scene is overwritten and erased.

Further, since the REC end search device searches the boundary between the recorded area and the unrecorded area,
In the case of overlapping recording on the recorded area, there is a problem that the boundary between the recorded area and the unrecorded area does not always coincide with the previous recording end position. For example, when the tape is recorded over the entire body, the recording end position cannot be detected because there is no recording end position. Therefore, in order to accurately perform joint shooting from the previous recording end position, the user himself has to search for the previous recording end position while checking the reproduced image, which is very troublesome.

The present invention solves the above-mentioned conventional problems, and automatically searches the previous recording end position even when the tape is once stopped or unloaded, or when the tape is recorded over the recorded tape. The aim is to always be able to take accurate joint shots.

[0008]

In order to achieve this object, a tape recording / reproducing apparatus of the present invention, when recording a video / audio signal, generates a date and time at that time as date and time data and an external recording. When the standby is instructed, within a predetermined section before and after the recording / reproducing position (hereinafter, referred to as a search start position) of the tape-shaped recording medium at the time when the recording standby is instructed,
Discontinuity point searching means for searching for the presence or absence of a discontinuity point in the date and time data, and if detected, puts it in a recording standby state at the detection position, and if not detected, returns to the search start position and puts in a recording standby state. It has a configuration including.

[0009]

According to the present invention, with the above-described structure, the date and time generating means re-records on the recorded portion of the tape-shaped recording medium so as to overlap the recording portion, and the recording is ended in the middle portion up to the unrecorded portion. Also, a discontinuous point of date and time data occurs at the end position. Further, when the recording standby is instructed, the discontinuity point searching means automatically searches for the presence or absence of the discontinuity point of the date / time data within a predetermined section before and after the search start position,
When it is detected, the recording standby state is set at the position where the discontinuity point of the date and time data is detected, so that accurate joint shooting can be performed from the previous recording end position.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the arrangement of a tape recording / reproducing apparatus according to an embodiment of the present invention. In FIG. 1, recording / reproducing means 2 is means for recording / reproducing video / audio signals and date / time data on / from the tape-shaped recording medium 1, a tape driving means 3 for moving or stopping the tape-shaped recording medium 1, and a recording / reproducing head 4. A recording / reproducing switch 5, a recording signal processing circuit 6, a recording amplifier 7, and a reproducing amplifier 8
And a reproduction signal processing circuit 9. The date and time generating means 10 outputs the date and time at that time to the recording and reproducing means 2 at the time of recording the video / audio signal.
The discontinuity point search means 11 includes a date / time data detection means 12 and
Tape movement amount detecting means 13 and discontinuity point detecting means 14
And a recording standby control means 15. The date / time data detecting means 12 detects the date / time data from the reproduction signal reproduced by the recording / reproducing means 2, and the discontinuity point detecting means 14
Output date and time data to. Tape movement amount detecting means 13
Detects the amount of movement of the tape-shaped recording medium 1 during running, and outputs a sampling signal every time the amount of movement reaches a predetermined value. The discontinuity detecting means 14 is the tape moving amount detecting means 1.
The date and time data is sampled every time a sampling signal is input from No. 3, and when the difference between the date and time data sampled last time and the date and time data sampled this time is larger than a predetermined time, that is, when the discontinuity of the date and time data is detected, Outputs continuous point detection signal. Recording standby control means 1
No. 5 is not provided when a discontinuity detection signal is input from the discontinuity detection means 14 within a predetermined section before and after the recording / reproducing position of the tape-shaped recording medium 1 at the time when a recording standby instruction is given from the outside. The recording / reproducing means 2 is controlled so as to be in the recording standby state at the recording / reproducing position of the tape-shaped recording medium when the continuous point detection signal is input, and when the discontinuous point detection signal is not input, the recording is performed. The recording / reproducing means 2 is controlled so as to be in the recording standby state at the recording / reproducing position of the tape-shaped recording medium 1 when the standby is instructed. Further, the date / time data detecting means 12, the tape movement amount detecting means 13, the discontinuity point detecting means 14, and the recording standby control means 15 are realized by a program executed by the microcomputer 16.

FIG. 2 shows a tape-shaped recording medium 1 shown in this embodiment.
Is the format of the recording signal of. In this format, all recording / reproducing signals are digital signals and
The amount of data for one frame is 0 track. Each track has an audio signal area for recording an audio signal,
It consists of a video signal area for recording video signals and a subcode area for recording subcode data. The subcode data is the recording time length from the beginning of the tape, that is, absolute time information indicating the absolute position from the beginning of the tape. , And date and time data indicating the recorded date and time, a signal for cueing, and the like.

FIG. 3 shows the structure of the date and time data shown in this embodiment. In FIG. 3, the date and time data are year, month, day, hour,
A capacity of 1 byte is assigned to each of minutes and seconds, and a total of 6 bytes of data is recorded and reproduced in the subcode area of the tape-shaped recording medium 1.

The operation of the tape recording / reproducing apparatus of this embodiment constructed as described above will be described below.

When a recording standby instruction is given from the outside, the recording standby control means 15 first stores the current recording / reproducing position of the tape-shaped recording medium 1. Next, in order to search the discontinuity of the date and time data in the rewinding direction, the recording standby control means 15 sends a control signal for rewinding reproduction, and the tape drive means 3 moves the tape-shaped recording medium 1 in the rewinding direction. By running and switching the recording / reproducing switch 5 to the reproducing side, the reproduced signal is output to the reproduced signal processing circuit 9 through the reproducing amplifier 8. The reproduction signal processing circuit 9 outputs a subcode read signal to the date / time data detecting means 12 each time the subcode data for one track is input. The date / time data detecting means 12 detects the date / time data from the subcode area of the reproduction signal to detect the discontinuity point detecting means 1 each time the subcode read signal is inputted from the reproduction signal processing circuit 9.
Output to 4. The tape movement amount detecting means 13 outputs a signal from the tape driving means 3 that is proportional to the rotation cycle of the capstan motor that controls the running of the tape-shaped recording medium 1 (hereinafter, F).
(Abbreviated as G signal) is always input to detect the movement amount of the tape-shaped recording medium 1, and a sampling signal is output when the movement amount becomes equal to a predetermined value. Discontinuity point detection means 1
Reference numeral 4 samples the date and time data from the date and time data detector 12 when a sampling signal is input from the tape movement amount detector 13 and compares the value of the date and time data sampled last time with the value of the date and time data sampled this time. If the difference is larger than the predetermined time, it is determined that the date and time data is discontinuous and the discontinuity detection signal is output.

The recording standby control means 15 searches for the discontinuity point of the date / time data in the rewinding direction, and (1) the discontinuity point detection means 14 can detect the discontinuity point of the date / time data.
(2) Tape-shaped recording medium 1 rewound by a predetermined section (3)
Rewind to the beginning of, and end under any of the conditions.
When the discontinuous point can be detected, the recording standby control means 15 stores the detected position. Next, in order to search for the discontinuity point in the fast-forward direction, a control signal is sent from the recording standby control means 15 to the tape drive means 3 so that the tape-shaped recording medium 1 runs in the fast-forward direction.

The recording standby control means 15 searches for a discontinuity point in the fast-forward direction, (1) the discontinuity point can be detected by the discontinuity detection means 14, (2) fast-forwards in a predetermined section,
(3) The fast-forwarding to the end of the tape-shaped recording medium 1 is performed, and the process ends under any of the conditions.

As described above, the recording standby control means 15
Ends the search for discontinuity points in the date / time data within a predetermined section before and after the search start position. The recording standby control means 15 performs the following three types of operations according to the search result. (1) When the discontinuity detection means 14 can detect one discontinuity point in the date and time data, the recording standby control means 15 records so as to shift to the recording standby state at the detection position of this discontinuity point. A recording standby control signal is sent to the reproducing means 2. (2) If there are two discontinuities that can be detected before and after the search start position,
A control signal is sent from the recording standby control means 15 to the recording / reproducing means 2 so as to shift to the recording standby state at the detection position of the discontinuous point closer to the search start position. (3) When the discontinuity of the date and time data is not detected, the recording standby control means 15 sends a control signal to the recording / reproducing means 2 so as to return to the search start position and enter the recording standby state.

Next, a program of the microcomputer 16 for realizing the discontinuity point searching means 11 will be described.

FIG. 4 is a flow chart showing the main routine of the microcomputer 16. In FIG. 4, reference numerals 14 and 15 respectively correspond to the same reference numerals in FIG. That is, the recording standby control means 15 is realized by the discontinuity point search routine 402, and the discontinuity point detection means 14 is realized by the discontinuity point detection routine 403. In addition, each routine is executed once every 1/60 second by adjusting the time by the time adjustment routine 405. Discontinuity point search routine 402 and discontinuity point detection routine 403
Is executed only when the recording is not on standby, so step 40
At 1, it is determined whether or not recording is on standby. In step 404, routines other than the discontinuity point search routine 402 and the time adjustment routine 405 are executed.

FIG. 5 shows a date / time data detection routine implemented by the external interrupt processing routine of the microcomputer 16.
It is executed every time a subcode read signal is supplied from the reproduction signal processing circuit 9 to the external interrupt input terminal of the microcomputer 16. In FIG. 5, reference numeral 12 corresponds to the means denoted by the same reference numeral in FIG. That is, the date / time data detection means 12 is realized by the date / time data detection routine of FIG. The date / time data detection routine of FIG. 5 reads the subcode data from the reproduction signal processing circuit 9 (step 50).
1) The date / time data is detected from the subcode data (step 502) and stored in the memory (step 503). If the date and time data is not recorded,
That is, when the unrecorded portion of the tape-shaped recording medium 1 is reproduced, 0:00:00 of 0 years of year 0 is stored in the memory as date and time data.

FIG. 6 is a flow chart showing the processing contents of the tape movement amount detection routine realized by the FG interrupt processing routine of the microcomputer 16, and 13 corresponds to the means denoted by the same reference numerals in FIG. That is, the tape movement amount detection means 13 is realized by the tape movement amount detection routine of FIG. In FIG. 6, the position counter and the FG
The counter is a 16-bit internal counter set on the memory. The position counter is a counter that represents the absolute amount of movement of the recording / reproducing position from the search start position of the tape-shaped recording medium 1, and is preset to a predetermined value at the start of search, as will be described later. The FG counter is a counter for measuring the relative movement amount of the tape-shaped recording medium 1. The microcomputer 16 executes the tape movement amount detection routine of FIG. 6 every time the FG signal is supplied from the capstan motor controlling the running of the tape-shaped recording medium 1 to the external interrupt input terminal of the microcomputer 16.

In the tape movement amount detection routine of FIG. 6, the tape-shaped recording medium 1 is moved in accordance with the traveling direction (step 60).
1) increment the position counter in the fast-forwarding direction (step 602), decrement the position counter in the rewinding direction (step 603), step 60
Go to 4. In step 604, the FG counter is incremented, and in step 605, it is determined whether or not the FG counter becomes equal to 16-bit data 0100h representing 1 second. If they are equal, the FG counter is reset to 0000h (step 606), and the sampling signal is output. Is generated (step 607) and the process ends. Actually, the sampling signal is generated by setting the sampling request flag secured on the internal memory of the microcomputer 16 to 1.

FIG. 7 is a flow chart showing the processing contents of the discontinuity point detection routine 403. The discontinuity point detection routine 403 is executed by the microcomputer 16 when the sampling request flag is set by the tape movement amount detection means 13.
Executed in the main loop of.

In the discontinuity detection routine 403, if the sampling request flag is set by the tape movement amount detecting means 13, the date and time data detected by the date and time data detecting means 12 is stored as new date and time data (step 701). ). Next, the difference between the new date and time data and the previously detected old date and time data is obtained (step 704), and the difference is compared with a predetermined value (step 705). In this embodiment, the predetermined value is set to 5 seconds, and if the difference between the date and time data obtained in step 702 is larger than 5 seconds, it is determined that the date and time data is discontinuous and the process proceeds to step 706. By setting the predetermined value to 5 seconds, it is possible to consider the same scene even if recording was accidentally stopped while recording a certain scene and recording was restarted immediately. .
In addition, since there is almost no interval between a certain scene and another scene within 5 seconds, even if the predetermined value is set to 5 seconds, the discontinuity detecting operation of the present embodiment does not cause any problem. In step 706, the discontinuity point detection signal is output and the process ends. Here, in practice, the discontinuity point detection signal is output by setting the discontinuity point detection flag secured on the internal memory of the microcomputer 16 to 1. Step 70
In step 5, if the difference between the date and time data obtained in step 704 is smaller than 5 seconds, it is determined that the date and time data is continuous and the old date and time data is updated, that is, the new date and time data is stored as the old date and time data. Then (step 707), the process ends.

8 and 9 are flowcharts showing the processing contents of the discontinuity point search routine 402. In FIG. 8 and FIG. 9, the search processing mode is a parameter set in the memory in order to branch the processing flow of the discontinuity point search routine 402, and when the operation other than the recording standby is instructed, Is set to "wait".

When the discontinuity point search routine 402 is executed, it is first determined in step 801 whether the search processing mode is "wait for instruction". When the search processing mode is “waiting for instruction”, the process proceeds to step 802. Step 802
Then, it is determined whether the key code set in the key memory is the key code for recording standby. If the key code is a recording standby key, the process proceeds to step 803, the search processing mode is set to "search in the rewind direction", and the process proceeds to step 804. In step 804, the value of the position counter indicating the recording / reproducing position of the tape-shaped recording medium 1 is set to 1 indicating the search start position.
6-bit data 8000h (hereinafter abbreviated as initial value)
To clear the discontinuity point detection flag and the detected flag used in the following processing. Next, the tape-shaped recording medium 1 is run in the rewinding direction to start the search for the discontinuity point in the rewinding direction, and the process of step 804 is ended.

Next, when the discontinuity point search routine 402 is executed, the process proceeds to step 806 via step 801 and step 805. In step 806, it is determined whether or not a discontinuity point has been detected, that is, whether or not the discontinuity point detection flag is set in step 706. If the discontinuity detection flag is set, step 8
In step 07, the value of the position counter representing the recording / reproducing position at that time is stored in the position memory A as the detection position A, and the discontinuity point can be detected when the search processing mode is "rewind direction search". After setting the detected flag to notify that, the discontinuity point detection flag is cleared and the process proceeds to step 809. When the discontinuity is not detected in step 806, the process proceeds to step 808, it is determined whether the tape-shaped recording medium 1 is rewound in a predetermined section, that is, whether the value of the position counter becomes smaller than 7800h, and if it is smaller, Go to step 809. Step 8
In 09, the retrieval processing mode is set to "prevent double reading", and then the tape-shaped recording medium 1 is run in the fast-forwarding direction in step 810 in order to start the search for the discontinuous point in the fast-forwarding direction after returning to the detection start position. .

Next, when the discontinuity point search routine 402 is executed, the process proceeds to step 812 via step 801, step 805 and step 811. In step 812, it is determined whether the value of the position counter has returned to the initial value. When it returns to the initial value, the process proceeds to step 813, the search processing mode is set to "fast-forward direction search" to search for the discontinuous point in the fast-forward direction, the discontinuous-point detection flag is reset (step 814), and the next processing is performed. Move on to.

Next, when the discontinuity point search routine 402 is executed, the process proceeds to step 816 via step 801, step 805, step 811, and step 815.
In step 816, whether a discontinuity point was detected,
That is, it is determined in step 706 whether the discontinuity detection flag is set. If the discontinuity point detection flag is set, the process proceeds to step 817, the value of the position counter indicating the recording / reproducing position at that time is stored in the position storage memory B as the detection position B, and then the discontinuity point detection flag is set. Clear and proceed to step 818. In step 818, it is determined whether or not discontinuity points have been detected at two positions before and after the search start position, that is, whether or not the detected flag has been set. If one location is detected, that is, if the detected flag is not set, the process proceeds to step 819. In this embodiment, since the discontinuous points of the date and time data are sampled at a cycle of 1 second, there is a gap between the detection position B and the position 1 second before the detection position B on the tape-shaped recording medium 1. There will be continuous points. In step 819, in order to detect the discontinuity on the tape-shaped recording medium 1 for one second, the discontinuity is searched from the detection position B in the rewinding direction. Whenever the value of the FG counter in the tape movement amount detection routine of FIG. 6 changes by one, the date / time data is sampled, and if a discontinuity can be detected, the recording / reproducing means is set so as to shift to the recording standby state at the detected position. The control signal is sent to No. 2, and the process proceeds to step 820 to set the processing mode to "wait for instruction" and move to the next process. Step 818
In, if two positions are detected, that is, if the detected flag is set, the process proceeds to step 821,
It is determined which of the detection position A and the detection position B is closer to the search start position, that is, which value of (Equation 1) and (Equation 2) is smaller.

[0031]

[Equation 1]

[0032]

[Equation 2]

If the value of (Equation 1) is smaller, that is, if the detection position A is closer, the process proceeds to step 822, and the search processing mode is set to "recording standby A" in order to set the recording standby state at the detection position A. Then, the tape-shaped recording medium 1 is run in the rewinding direction (step 823), and the process proceeds to the next step.
If the value of (Equation 2) is smaller, that is, the detected position B is closer, the process proceeds to step 819 to perform the above-described operation and shift to the recording standby state.

If the discontinuity point is not detected in step 816, that is, if the discontinuity point detection flag is not set in step 706, it is determined whether or not the predetermined section is fast-forwarded, that is, the value of the position counter is 98.
It is determined whether or not it is larger than 00h, and if it is larger, the process proceeds to step 825. In step 825, it is determined whether a discontinuity point has been detected when the search processing mode is "search in the rewinding direction", that is, whether the detected flag has been set. If it is set, the process proceeds to step 822, the search processing mode is set to "recording standby A" to set the recording standby state at the detection position A, and the tape-shaped recording medium 1 is run in the rewinding direction (step 8
23) Move to the next processing. If it is not set, the process proceeds to step 826, the search processing mode is set to “recording standby 0” to set the recording standby state at the search start position, the tape-shaped recording medium 1 is run in the rewinding direction, and the next processing is performed. Move.

Next, if the search processing mode is "recording standby A" when the discontinuity point search routine 402 is executed,
After Step 801, Step 805, Step 811, Step 815, Step 827, Step 828 is proceeded to, where it is judged whether or not it is rewound to the detection position A,
If it rewinds, it proceeds to step 829. In this embodiment, since the discontinuous points of the date and time data are sampled at the cycle of 1 second, the detection position A on the tape recording medium 1 is detected.
And a position one second behind the detection position A exists a discontinuity point. In step 829, in order to detect the discontinuity point on the tape-shaped recording medium 1 for one second, the discontinuity point is searched from the detection position A in the rewinding direction. Whenever the value of the FG counter in the tape movement amount detection routine of FIG. 6 changes by one, the date / time data is sampled, and if a discontinuity can be detected, the recording / reproducing means is set so as to shift to the recording standby state at the detected position. 2, the control signal is sent to step 2, and the process proceeds to step 830 to set the processing mode to "wait for instruction" and end.

Next, if the search processing mode is "recording standby 0" when the discontinuity point search routine 402 is executed,
After step 801, step 805, step 811, step 815, step 827, proceed to 831,
It is determined whether or not it has rewound to the search start position. After rewinding, the process proceeds to step 832, and a control signal is sent to the tape driving means 3 so that the recording start state is set in the first track of the frame which is the search start position, and the recording / reproducing means 2 is shifted to the recording standby state. The process proceeds to step 833, and the processing mode is set to "wait for instruction", and the process ends.

As described above, according to the present embodiment, at the time of recording, the date and time at the time of recording is recorded by the date and time generating means 10 as date and time data, and at the time of shifting to the recording standby state, the discontinuity point searching means 13 presently The presence / absence of a discontinuity point of the date / time data near the recording / reproducing position of the tape-shaped recording medium 1 is searched, and if it is detected, the recording standby state is set at the discontinuity point detection position. If it is not detected, the search is started. By returning to the position and entering the recording standby state, it becomes unnecessary for the user to adjust the recording start position at the next recording, so that the operability is improved.

In the above embodiment, the tape movement amount detecting means 13 detects the recording / reproducing position of the tape-shaped recording medium 1 by means of the FG signal as the means for detecting the recording / reproducing position of the tape-shaped recording medium 1. However, the tape movement amount detecting means 13 may use any means as long as it can detect the recording / reproducing position of the tape-shaped recording medium 1. For example, a timer may be used to measure time. Further, the address is recorded on the tape-shaped recording medium 1,
The address may be read.

Further, although the date and time data is sampled at a cycle of 1 second in the above embodiment, this sampling cycle may be set arbitrarily.

The format of the recording signal of the tape-shaped recording medium 1 and the format of the date and time data are not limited to the formats shown in the above embodiments. For example, although the minimum unit of date and time data is seconds in the above embodiment, the minimum unit of date and time data may be a frame.

Further, in the above embodiment, when the search start position is the unrecorded portion of the tape-shaped recording medium 1, it is judged that there is an unrecorded portion after this search start position, and only the rewinding direction is searched. Then, the search may be ended without performing the search in the fast-forward direction.

[0042]

As described above, according to the present invention, at the time of recording, the date and time at the time of recording output from the date and time generating means is recorded on the tape-shaped recording medium as date and time data. Next, when shifting to the recording standby state, the discontinuity point searching means automatically searches for the previous recording end position, so that the user does not need to adjust the recording start position at the next recording, and the operability is improved. improves. For example, when a stop instruction is given during recording, for example, when the camera / VTR switch is switched from the camera side to the VTR side during recording, when the tape is unloaded by an eject operation, or when a recorded tape is recorded. Since the above operation is performed even in the case of overlapping shooting, it is very effective particularly in a camera-integrated VTR that records a large number of short scenes, because the image at the time of reproduction is not disturbed even at the joints.

Further, even when the stop is instructed during the recording standby, the discontinuity point of the date and time data is not erased, so that the previous recording end position can be searched at the next recording, and the recorded scene at the time of the joint recording. The end part of is not overwritten and erased.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a tape recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a tape format of a tape-shaped recording medium in the embodiment.

FIG. 3 is a schematic diagram showing a format of date and time data in the embodiment.

FIG. 4 is a flowchart showing a main routine of the microcomputer in the embodiment.

FIG. 5 is a flowchart showing the processing contents of the date / time data detecting means in the embodiment.

FIG. 6 is a flowchart showing the processing contents of the tape movement amount detecting means in the embodiment.

FIG. 7 is a flowchart showing the processing contents of the discontinuity point detection means in the embodiment.

FIG. 8 is a flowchart showing the processing contents of recording standby control means in the embodiment.

FIG. 9 is a flowchart showing the processing contents of the recording standby control means in the embodiment.

[Explanation of symbols]

 1 tape-shaped recording medium 2 recording / reproducing means 10 date / time generating means 11 discontinuity point searching means

Claims (5)

[Claims] 1. When recording a video / audio signal, date / time generating means for outputting the date / time at that time as date / time data, and recording / reproducing at least the video / audio signal and the date / time data output by the date / time generating means on a tape-shaped recording medium. When the recording standby is instructed from the outside by the recording / reproducing means, the presence or absence of the discontinuity of the date / time data in a predetermined section before and after the recording / reproducing position of the tape-shaped recording medium at the time when the recording standby is instructed. If it is detected, the recording / reproducing means is put in the recording standby state at the discontinuous point detection position of the date / time data, and if not detected, the recording / reproducing means is set to the recording standby state at the time when the recording standby is instructed. A tape recording / reproducing apparatus comprising: a discontinuity point searching means for returning to a recording / reproducing position of a tape-shaped recording medium to put it in a recording standby state. 2. A discontinuity point search means detects date and time data from a reproduction signal reproduced by the recording and reproduction means and outputs the date and time data, and a moving amount of the tape-shaped recording medium during traveling, A tape movement amount detection means that outputs a sampling signal each time the movement amount reaches a predetermined value, date and time data at the time when the previous sampling signal arrives from the tape movement amount detection means, and the time when this sampling signal arrives Of the tape-shaped recording medium at the time when a recording standby is instructed from the outside, by comparing the date and time data of the above, and outputting a discontinuous point detection signal when the difference is larger than a predetermined value. When the discontinuity point detection signal is input from the discontinuity point detection means within a predetermined section before and after the recording / reproducing position, the test at the time when the discontinuity point detection signal is input. The recording / reproducing means is controlled so as to be in the recording standby state at the recording / reproducing position of the recording medium, and when the discontinuity detection signal is not input, the tape at the time when the recording standby is instructed. 2. A tape recording / reproducing apparatus according to claim 1, further comprising a recording standby control means for controlling the recording / reproducing means so as to be in a recording standby state at a recording / reproducing position of the flat recording medium. 3. When there are a plurality of discontinuity points of date and time data within a predetermined section, at the detection position of the discontinuity point closest to the recording / reproducing position of the tape-shaped recording medium at the time when the recording standby is instructed. 2. The recording standby state is set.
The tape recording and reproducing apparatus described. 4. When recording a video / audio signal, the date and time at that time is recorded as date and time data on a tape recording medium, and when shifting to a recording standby state, the tape state at the time when the recording standby is instructed. Search for the presence or absence of the discontinuity of the date and time data within a predetermined section before and after the recording / reproducing position of the recording medium,
When detected, the recording standby state is set at the detection position of the discontinuous point, and when not detected, the recording standby state is returned by returning to the recording / reproducing position of the tape-shaped recording medium at the time when the recording standby is instructed. Tape recording / playback method. 5. When there are a plurality of discontinuity points of date and time data within a predetermined section, at the detection position of the discontinuity point closest to the recording / reproducing position of the tape-shaped recording medium at the time when the recording standby is instructed. 5. A recording standby state is set.
The tape recording and reproducing method described.