JPH06325434A - Device for recording and reproducing video signal - Google Patents

Abstract

PURPOSE:To provide a device for recording and reproducing a video signal starting no reservation video recording operation when a single video signal is divided to be recorded on plural recording areas. CONSTITUTION:The video signal is divided to two channels by a tuner 18 and a video signal processing system 19, and they are recorded on a track 51 and a track 52 respectively by a magnetic head 4 and the magnetic head 52. The video signal is recorded on the track 51 on a magnetic tape 5 by the tuner 1, the video signal processing system 2 and magnetic head 4. The video signal is recorded on the track 52 on a magnetic tape 5 by a recording system consisting of a tuner 6, video signal processing system 7 and magnetic head 9. Reservation information inputted from an external operation panel 13 is inputted to a timer micro computer 11 to be stored in a storage circuit 10. By the timer micro computer 11, the present time is compared with the reservation information in the storage circuit 10, and when the reservation time elapses, the instruction of video recording start/end is issued to a system micro computer 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal recording / reproducing device such as a video tape recorder (hereinafter referred to as VTR) having a recording reservation device incorporated therein.

[0002]

2. Description of the Related Art A high-definition baseband signal is recorded separately on two tracks, and is recorded in NTSC, PAL, or SECA.
The standard signal of M is V that allows simultaneous recording and playback of two programs.
As TR, a VTR standard named W-VHS, which has an upward compatibility with VHS (registered trademark), was announced, newspapers,
It is published in magazines. For example, the magazine "HiVi" 1993 published by Stereo Sound Co., Ltd.
In the March issue of the year, pages 138 to 142, this VTR
Is introduced.

The inventors of the present invention have paid attention to a specification capable of simultaneously recording and reproducing simultaneously two programs of standard signals of NTSC, PAL and SECAM of the systems published in the above-mentioned magazines and paying attention to a plurality of NTs.
In a VTR that records a video signal such as an SC on a plurality of tracks on a magnetic tape, a video signal recording / reproducing apparatus that can reserve a recording even when the recording standby state is not set is filed (Patent application 5-91428
issue). This video signal recording / reproducing apparatus will be described as a conventional technique. Here, the part for recording and reproducing the HDTV baseband signal is not described.

FIG. 6 is a block circuit diagram showing a conventional video signal recording / reproducing apparatus. In the figure, 1 and 6 are first and second tuners, 2 and 7 are first and second video signal processing systems,
3, 8 are first and second output terminals, 4 and 9 are first and second magnetic heads, 5 is a magnetic tape, 51, 52 and 53 are first, second and third magnetic tapes on the magnetic tape. A track, 10 is a storage circuit for storing reservation information, 11 is a timer microcomputer for managing reservation information and the current time, 12 is a system microcomputer for managing the operation of the entire VTR, 13 is an external operation panel operated by the user, and 14 is A switching circuit, 15 is a frame synchronizer.

Next, the operation will be described. First, the operation during recording will be described. The first tuner 1 tunes the signal received from the antenna, tunes to the required channel, extracts the first video signal, supplies it to the switching circuit 14, and at the same time supplies it to the first video signal processing system 2. . The first video signal processing system 2 outputs the first video signal from the first output terminal 3 and, at the same time, performs conversion processing to a signal form for recording on a magnetic tape to obtain a first recording signal. And supplies it to the first magnetic head 4. The signal form for recording on the magnetic tape is, for example, a signal form in which a color difference line-sequential color signal and a luminance signal are frequency-modulated for time-domain compression multiplexing, a low-frequency conversion carrier color signal, and a frequency-modulated luminance signal. There are a signal form in which frequency multiplexing is performed, a signal form in which a composite video signal is frequency-modulated, and the like. The first magnetic head 4 has a first
Recording signal is recorded on the first track 51 on the magnetic tape 5. The first magnetic head 4 is actually not limited to one magnetic head, but the first video signal processing system 2
It is assumed that the pair of heads are arranged facing each other on the cylinder to which the first recording signal output from the head is supplied.

The second tuner 6 tunes the signal received from the antenna, tunes to the required channel, extracts the second video signal, and supplies it to the frame synchronizer 15. The switching circuit 14 selects the first video signal output from the first tuner 1 based on the control signal from the system microcomputer 12 and selects the frame synchronizer 15
Supply to. The frame synchronizer 15 synchronizes the second video signal in units of fields or frames so as to have a constant phase relationship on the same time axis as the first video signal. The second video signal is kept constant with respect to the first video signal in consideration of the difference in the mounting angle of the head so that the signals recorded on the first track 51 and the second track 52 on the magnetic tape can be synchronized. It is time-delayed and supplied to the second video signal processing system 7. The second video signal processing system 7 outputs the second video signal from the second output terminal 8 and, at the same time, performs conversion processing into a signal form for recording on a magnetic tape to obtain a second recording signal. And supplies it to the second magnetic head 9. The signal form for recording on the magnetic tape is, for example, a signal form in which a color difference line-sequential color signal and a luminance signal are time-domain compressed and multiplexed, and a low-frequency conversion carrier color signal and a frequency-modulated luminance signal. Frequency-multiplexed signal form,
There is a signal form in which a composite video signal is frequency-modulated. Second
The magnetic head 9 records the second recording signal on the second track 52 on the magnetic tape 5. The second magnetic head 9 is actually not limited to one magnetic head,
It is assumed that a pair of heads are arranged facing each other on the cylinder to which the second recording signal output from the second video signal processing system 7 is supplied.

Next, the operation during reproduction will be described. The first magnetic head 4 reproduces the signal recorded on the first track 51 on the magnetic tape 5. First video signal processing system 2
Outputs the first video signal from the first output terminal 3 by restoring the baseband video signal before conversion from the signal form for recording on the magnetic tape.

The second magnetic head 9 reproduces the signal recorded on the second track 52 on the magnetic tape 5.
The second video signal processing system 7 restores the baseband video signal before conversion from the signal form for recording on the magnetic tape, and outputs the second video signal from the second output terminal 8. .

Next, the operation of recording on the other track while reproducing from one track will be described. Here, a case of recording on the second track 52 while reproducing from the first track 51 will be described as an example. The first magnetic head 4 reproduces the signal recorded on the first track 51 on the magnetic tape 5. First video signal processing system 2
Supplies the first video signal from the first output terminal 3 to the switching circuit 14 at the same time by performing restoration processing on the baseband video signal before conversion from the signal form for recording on the magnetic tape. At this time, the second tuner 6
The signal received from the antenna is tuned to select a necessary channel to extract a second video signal and supply it to the frame synchronizer 15. The switching circuit 14 selects the first video signal output from the first video signal processing system 2 based on the control signal from the system microcomputer 12 and supplies it to the frame synchronizer 15. The frame synchronizer 15 synchronizes the second video signal in units of fields or frames so as to have a constant phase relationship on the same time axis as the first video signal. First on magnetic tape
In order to synchronize the signals recorded on the second track 52 and the second track 52, the second video signal is delayed with respect to the first video signal by a certain time in consideration of the difference in the mounting angle of the head, 2 to the video signal processing system 7. The second video signal processing system 7 outputs the second video signal to the second output terminal 8
At the same time, the signal is converted into a signal form for recording on a magnetic tape, and a second recording signal is obtained and supplied to the second magnetic head 9. The second magnetic head 9
The second recording signal is transferred to the second track 52 on the magnetic tape 5.
To record. Therefore, the second magnetic head 9 forms the second track 52 between the first track 51 on which the first recording video signal is recorded and the third track 53 on which, for example, the audio signal is recorded. It will be.

The first magnetic head 4 is placed on the first track 51 by an automatic tracking circuit which controls the tracking phase of the magnetic head on the cylinder and the magnetic tape so that the signal amplitude reproduced from the magnetic track by the magnetic head becomes maximum. It is possible to form the second track 52 between the first track 51 and the third track 53 by the second magnetic head 9 as long as it is adjusted so as to track accurately. Further, if the first magnetic head 4 and the second magnetic head 9 are movable heads that are capable of dynamic track following, for example, if they are moving heads using a moving coil, then two tracks on which micron-order tracks have already been recorded. It is easy to form between the tracks.
Needless to say, the same operation can be performed when recording on the first track 51 while reproducing from the second track 52.

The external operation panel 13 accepts input of information such as recording start date / time, recording end date / time, recording channel, etc. necessary for recording reservation by a user's button operation or the like, and supplies the reservation information to the timer microcomputer. Timer microcomputer 1
1 stores the reservation information at a predetermined address of the memory circuit 10 by performing processing such as determining the content of the reservation information and prompting the user to make corrections as necessary. The timer microcomputer 11 compares the current date and time with the recording start date and time and the recording end date and time stored in the storage circuit 10, and supplies a signal to the system microcomputer 12 to prompt a predetermined operation when they match. The system microcomputer 12 manages each block constituting the VTR including the first and second tuners 1 and 6, the first and second video signal processing systems 2 and 7, and the like.

The reserved recording operation will be described by taking as an example a reserved recording method in which reserved recording information is input while being displayed in a list form on the TV screen and the input result is confirmed. The external operation panel 13 includes, for example, a cursor operation key that moves on the TV screen to specify an input item, a key that moves up / down the display data of the item where the cursor is positioned, a key that determines the reservation content, and the like. Enter the scheduled recording information using these keys. At this time, the state of the TV screen in which the inputted reservation recording information is displayed in the form of a list has contents as shown in FIG.

FIG. 7 is a reserved recording information display screen for explaining the operation of the conventional video signal recording / reproducing apparatus.
The reservation program of No. 1 and No. 1 The reservation program for 2 is 7:
Between 30 and 8:00, and No. No. 2 reservation program and No. In the reservation program of No. 3, the reservation time overlaps between 9:00 and 9:30. In the VTR which records a single signal on one track as described in the prior art, it is impossible to record both signals when the reservation times overlap in this way. However, in the case of a VTR that records a plurality of signals on a plurality of tracks, even if the reservation times overlap, if the tracks are distributed as shown in FIG. 8, both programs can be recorded.

After the reservation is set, a switch for switching between the reserved recording standby state and the normal manual operation state arranged on the external operation panel 13 or the like is set to the reserved recording standby side. The main power supply of the VTR is cut off by setting to the reserved recording standby state, and all operations such as normal recording, playback, stop, fast forward, rewind, special playback such as slow, search, and still become impossible. . As a result, if a user forgets that he / she has made a recording reservation, or an operation such as recording / playback is performed by a third party, an important TV program that needs to be reserved can not be recorded. It has been prevented. Also, if the switch for switching between the reserved recording standby state and the normal manual operation state is left on the normal manual operation side, the reservation information is completely ignored, and the reserved recording operation is performed unless it is set to the reserved recording standby side. Absent. In this way, a VTR having a reservation standby switch will be referred to as a first VTR hereinafter.
Write as TR.

In another VTR, after setting the reservation, the power switch is cut off to enter the reserved recording standby state, and the normal recording, reproduction, stop, fast forward, rewind, slow or search operation is performed while the power switch is conductive. In some cases, reserved recording does not work in a state where an operation such as still reproduction is performed. The VTR without the reservation standby switch will be referred to as a second VTR hereinafter.

The operation of the reservation setting shown in FIG. 7 will be described below. No. Since the recording start time of the reservation program of No. 1 is 7:00, the current time is 7:00 (or 7:
Timer microcomputer 11 at the stage when (a predetermined time before 00)
Sends a signal for requesting recording on the first track 51 and a signal for requesting setting of the first tuner 1 to channel 10 to the system microcomputer 12. The system microcomputer 12 includes a first tuner 1 and a first video signal processing system 2
By controlling the circuits and mechanisms necessary for recording, including
The recording is started on the track 51. Timer microcomputer 11
Next enters the standby state until the recording start time or the recording end time matches.

Next, the time corresponding to the current time is No. The recording start time of the reservation program of 2 and the current time is 7:30
At this stage, the timer microcomputer 11 sets the signal requesting the recording on the second track 52 and the second tuner 6 to 6
A signal requesting to set the channel is sent to the system microcomputer 12. The system microcomputer 12 controls the circuits and mechanisms necessary for recording, including the second tuner 6 and the second video signal processing system 7, and starts recording on the second track 52. The timer microcomputer 11 then enters a standby state until the recording start time or the recording end time matches.

Next, the time that matches the current time is No. The recording end time of the reservation program of 1 and the current time is 8:00
At this stage, the timer microcomputer 11 sends to the system microcomputer 12 a signal requesting to stop recording on the first track 51. The system microcomputer 12 controls the circuits and mechanisms necessary for recording including the first tuner 1 and the first video signal processing system 2 to stop the recording on the first track 51. The timer microcomputer 11 then enters a standby state until the recording start time or the recording end time matches.

Next, the time corresponding to the current time is No. The recording start time of the reservation program of 3 and the current time is 9:00
At this stage, the timer microcomputer 11 turns on the signal requesting recording on the first track 51 and the first tuner 1
A signal requesting to set the channel is sent to the system microcomputer 12. The system microcomputer 12 controls the circuits and mechanisms necessary for recording, including the first tuner 1 and the first video signal processing system 2, and starts recording on the first track 51. The timer microcomputer 11 then enters a standby state until the recording start time or the recording end time matches.

Next, the time that matches the current time is No. The recording end time of the reservation program of 2 and the current time is 9:30
At this stage, the timer microcomputer 11 sends to the system microcomputer 12 a signal requesting to stop recording on the second track 52. The system microcomputer 12 controls the circuits and mechanisms necessary for recording including the second tuner 6 and the second video signal processing system 7 to stop the recording on the second track 52. The timer microcomputer 11 then enters a standby state until the recording start time or the recording end time matches.

Next, the time that matches the current time is No. The recording end time of the reservation program of 3 and the current time is 10: 0
When it reaches 0, the timer microcomputer 11 sends to the system microcomputer 12 a signal requesting to stop recording on the first track 51. The system microcomputer 12 controls the circuits and mechanisms necessary for recording including the first tuner 6 and the first video signal processing system 7 to stop the recording on the first track 51. The timer microcomputer 11 then enters a standby state until the recording start time matches.

In the following, No. Recording start time (10:30) of the reservation program of No. 4, No. Recording end time of 4 (1
1:30), the date changed and No. Each process is similarly performed in the order of the reservation program of No. 5.

Scheduled recording-related processing in the first VTR will be described with reference to the flowchart of FIG. First, it is checked whether the switch for switching between the reserved recording standby state and the normal manual operation state is set to the reserved standby state (102).
If it is set to the reservation standby side, the power is shut off (103) and the first reservation recording standby routine is entered. First
In the reserved recording standby routine, the first step is to check whether a reserved program has been input (104). If the reservation is not set, the reservation recording-related processing is stopped (110). If the reservation is set, it is checked whether there is a reservation for today (105). If there is a reservation for today, it is checked whether the current time matches the start time (or a predetermined time before the start time) (106). If the current time matches the start time,
The recording request signal and the channel setting signal are sent to the system microcomputer 12 (107), and the process returns to the beginning of the first reserved recording standby routine in order to process the next reserved program. If the current time does not match the start time, it is checked whether the current time matches the end time (108). If the current time coincides with the end time, a recording stop signal is sent to the system microcomputer 12 (109), and the process returns to the beginning of the reserved recording standby routine to process the next reserved program.
When the current time does not match the end time, the current time is compared with the start time or the end time and the process waits. 1
If it is not set to the reservation standby side in the processing of 02, the second reservation recording standby routine is entered.

In the second reserved recording standby routine, first,
It is checked if the reservation program is input (204).
If the reservation is not set, the reservation recording-related processing is stopped (210). If the reservation is set, it is checked if there is a reservation for today (205). If there is a reservation for today, the current time is the start time (or a predetermined time before the start time)
(206). If the current time matches the start time, the current operating state of one of the plurality of tracks is checked (211). When one of the tracks is in the recording state, the reproducing state, or the stopped state, the system microcomputer 12 sends the recording request signal and the channel setting signal to the other track.
(207) to process the next reserved program, the process returns to the beginning of the second reserved recording standby routine. If one of the tracks is not in the recording state, the reproducing state, or the stopped state, the next reserved program is processed, and the process returns to the beginning of the second reserved recording standby routine. If the current time does not match the start time in the processing of 206, it is checked whether the current time matches the end time (20
8). If the current time matches the end time, a recording stop signal is sent to the system microcomputer 12 (209), and the process returns to the beginning of the second reserved recording standby routine to process the next reserved program. When the current time does not match the end time, the current time is compared with the start time or the end time and the process waits.

Here, when the current time coincides with the start time in the second reserved recording standby routine, the operation state of the current VTR is checked, and one of the plurality of tracks is recorded, reproduced, If it is confirmed that the operation state is one of the stopped states, the recording request signal and the channel setting signal for the other track are sent to the system microcomputer 12. For example, when the VTR is in the fast-forward, rewind, or trick play state, it is impossible to record on the other track without disturbing normal operation. However, if the VTR is in one of the reproduction state, the recording state, and the stopped state with respect to one track, it is possible to record on the other track at the same time without causing any inconvenience.

Scheduled recording-related processing in the second VTR will be described with reference to the flowchart of FIG. First, it is checked whether the power switch is cut off (120). When the power switch is cut off, the first reserved recording standby routine is entered. The processing in the first reserved recording standby routine is similar to the operation of the reserved recording standby routine shown in the flowchart of FIG. If the power is not cut off, the second reserved recording standby routine is entered. The processing in the second reserved recording standby routine is the same as the operation of the second reserved recording standby routine shown in the flowchart of FIG.

[0027]

Since the conventional video signal recording / reproducing apparatus is configured as described above, the first recording mode in which a single video signal is divided and recording is performed in a plurality of recording areas is performed. Assuming that, when recording or reproducing is performed in the first recording mode, a single video signal is directly recorded in one recording area of the plurality of recording areas.
When the reserved recording start time of the reserved program set in the recording mode of 1 is reached, while both sides of the plurality of recording areas are in use in the first recording mode, the plurality of recording modes in the second recording mode are used. Since the overwriting is started only on one side of the, the signal of one side of the single video signal recorded in the first recording mode is erased at the time of reproduction, and the single signal recorded in the first recording mode is recorded at the time of recording. There is a problem that the signal on one side of the video signal is not recorded, and as a result, the video signal recorded in the first recording mode that remains remains meaningless.

The present invention has been made in order to solve the above problems, and when a single video signal is divided and recorded in a plurality of recording areas, or is already recorded in a plurality of recording areas. It is possible to obtain a video signal recording / reproducing apparatus that does not start the reserved recording operation of the mode in which a single video signal is recorded in one recording area when the recording medium in which the video signal of 4 is divided and recorded is reproduced. To aim.

[0029]

According to another aspect of the present invention, there is provided a video signal recording / reproducing apparatus which divides a single video signal into a plurality of recording areas and records the plurality of video signals in a first recording mode. A recording circuit having a second recording mode for simultaneously recording in a plurality of recording areas, recording start date and time of a plurality of signal sources,
A storage circuit that stores reservation information such as the recording end date and time, and a control circuit that controls the operation of the recording circuit by comparing the reservation information in the storage circuit with the current date and time, and make a reservation even when not in the reserved recording standby state It is provided with means for comparing the information with the current date and time, means for determining the current recording mode, and means for performing the reserved recording operation based on the result of this determination.

According to a second aspect of the present invention, there is provided a video signal recording / reproducing apparatus in which a single video signal is divided and recorded in a plurality of recording areas, and a plurality of video signals are recorded in a plurality of recording areas. A recording circuit having a second recording mode for simultaneously recording in a recording circuit, a storage circuit for storing reservation information such as recording start date and time and recording end date and time of a plurality of signal sources, and comparison between the reservation information in the storage circuit and the current date and time. A control circuit for controlling the operation of the recording circuit, means for comparing the reservation information with the current date and time even when not in the reserved recording standby state, a means for determining the current recording mode, and a result based on this determination result. The means to perform the reserved recording operation and the judgment to execute the reserved recording,
It is equipped with a means for displaying the result and giving a warning.

[0031]

According to the present invention, the video signal recording / reproducing apparatus determines the current recording mode and determines a plurality of video signals when the current time reaches the recording start time even when the recording recording standby state is not set. The reserved recording operation is performed in the second recording mode for recording in a plurality of recording areas, and the reserved recording operation is prohibited in the first recording mode in which a single video signal is divided and recorded in a plurality of recording areas. It is a thing.

In the video signal recording / reproducing apparatus according to the second aspect of the present invention, even if the video recording / reproducing apparatus is not in the reserved recording standby state, when the current time reaches the recording start time, the current recording mode is judged to determine a plurality of video images. The reserved recording operation is performed in the second recording mode in which signals are recorded in a plurality of recording areas, and the reserved recording operation is performed in the first recording mode in which a single video signal is divided and recorded in a plurality of recording areas. It is forbidden, and the fact that reserved recording cannot be executed is displayed and a warning is given because the first recording mode is being executed.

[0033]

【Example】

Example 1. 1 is a block circuit diagram showing a video signal recording / reproducing apparatus according to an embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 6 indicate the same parts, and the description thereof will be omitted. 54 is a control track, 1
6 is a control head, 17 is a detection circuit, and 18 is a third
Tuner, 19 is a third video signal processing system, 20, 21
Is a first and second switching circuit, and 22 is a third output terminal.

Next, the operation will be described. The operation of the parts common to FIG. 6 is the same as the operation of the conventional example shown in FIG. 6, so the description of the operation is omitted here. The third tuner 18 tunes the signal received from the antenna, selects a required channel, extracts a video signal, and supplies the video signal to the third video signal processing system 19. The third tuner 18 may, for example, transmit a MUSE-encoded high-definition broadcast to a BS.
It operates so as to output a MUSE-decoded baseband signal received from the antenna. Further, the third video signal processing system 19 is not limited to the signal supplied from the third tuner 18, but is N which is the standard system of the current television.
It is assumed that a television signal having scanning lines about twice the number of scanning lines of the TSC system, PAL system, or SECAM system is supplied. The third video signal processing system 19 outputs the third video signal from the third output terminal 22, and at the same time, divides one system video signal into two system video signals and records the signals on the magnetic tape. The conversion processing is applied to the form to obtain the third and fourth recording signals,
The third recording signal is supplied to the first switching circuit 20, and the fourth recording signal is supplied to the second switching circuit 21. The signal form for recording on the magnetic tape is, for example, a signal form in which a color difference line-sequential color signal and a luminance signal are frequency-modulated for time-domain compression multiplexing, a low-frequency conversion carrier color signal, and a frequency-modulated luminance signal. There are a signal form in which frequency multiplexing is performed, a signal form in which a composite video signal is frequency-modulated, and the like. The first switching circuit 20 outputs the first recording signal output from the first video signal processing system 2 and the third recording signal output from the third video signal processing system 19 from the system microcomputer 12. The switching control is performed based on the control signal instructing the first recording mode or the second recording mode, which is supplied to the first magnetic head 4. When the first recording mode is executed, the third recording signal is selected, and when the second recording mode is executed, the first recording signal is selected. The first magnetic head 4 records the first recording signal or the third recording signal on the first track 51 on the magnetic tape 5.
The second switching circuit 21 includes the second recording signal output from the second video signal processing system 7 and the third video signal processing system 1
The fourth recording signal output from the system microcomputer 1
Switching control is performed on the basis of a control signal instructing the first recording mode or the second recording mode output from the second magnetic head 9 and the second magnetic head 9 is supplied. When the first recording mode is executed, the fourth recording signal is selected, and when the second recording mode is executed, the second recording signal is selected. The second magnetic head 9 records the second recording signal or the fourth recording signal on the second track 52 on the magnetic tape 5. Actually, the first magnetic head 4 and the second magnetic head 9 are not limited to one magnetic head, but a pair of heads arranged facing each other on the cylinder is assumed.

A signal indicating the rotational position of the video head during recording is recorded on the control track 54.
The control head 16 has a control track 54
The control track signal is read out from and supplied to a circuit (not shown) for controlling the traveling system. This running system control circuit detects the position of the tape by the control track signal and adjusts the video head so that it does not deviate from the track. This control track signal is used not only for controlling the running system but also for the automatic cueing function of the tape. When used for automatic cueing, for example, a binary value of "0" or "1" can be expressed by changing the duty ratio of the pulse recorded on the control track at the time of recording. The code information of 1 "is recorded as a pulse signal whose duty ratio changes. The idea that information can be recorded by changing the duty ratio of the control track signal pulse is not limited to automatic cue information recording, but can be used to record the usage status of multiple tracks on a magnetic tape. You can do it. For example, the state of being recorded in the first recording mode,
A code indicating two states of the state recorded in the second recording mode is recorded. The detection circuit 17 observes the duty ratio of the control track signal to detect the code indicating the recording mode of the magnetic tape. The recording mode detected by the detection circuit 17 is supplied to the system microcomputer 12.

In the above-mentioned embodiment, the recording mode is recorded by changing the duty ratio of the control track signal recorded on the control track and is detected at the time of reproduction, but it is recorded on each track. The signal recorded on the first track 51 and the signal recorded on the second recording track 52 are highly correlated in the second recording mode in the first recording mode. If present, the signal recorded on the first track 51 and the second
It is also possible to use a configuration in which the low correlation of the signals recorded on the track 52 of is used. First track 5
The signal reproduced from No. 1 and the signal reproduced from the second track 52 are each subjected to a low-pass filter to remove a minute image change, and the difference between the two is taken. The configuration may be such that when the difference value is small, the first recording mode is set, and when the difference value is large, the second recording mode is set.

Scheduled recording-related processing in the first VTR will be described with reference to the flowchart of FIG. First, it is checked whether the switch for switching between the reserved recording standby state and the normal manual operation state is set to the reserved standby state (102).
If it is set to the reservation standby side, the power switch is shut off (103) and the first reservation recording standby routine is entered. The processing in the first reserved recording standby routine is the same as the operation of the reserved recording standby routine shown in the flowchart of FIG. If it is not set to the reservation standby side, the second reservation recording standby routine is entered. In the second reserved recording standby routine, it is first checked whether a reserved program has been input (204). If the reservation is not set, the reservation recording-related processing is stopped (210). If the reservation is set, it is checked if there is a reservation for today (205). If there is a reservation for today, it is checked whether the current time matches the start time (or a predetermined time before the start time) (206). If the current time matches the start time, it is checked whether the recording mode is the second recording mode (212). If it is in the second recording mode, the current operating state of one of the plurality of tracks is checked (211). When one of the tracks is in a recording state, a reproducing state, or a stopped state, a recording request signal and a channel setting signal for the other track are sent to the system microcomputer 12 (207) to make the next reservation. To process the program, return to the beginning of the second scheduled recording standby routine. In the processing of 211, the recording state for one track,
If it is not in the play state or stop state,
Return to the beginning of the second reserved recording standby routine to process the next reserved program. If the recording mode is the first recording mode in the process of 212, the process returns to the beginning of the second reserved recording standby routine in order to process the next reserved program. If the current time does not match the start time in the processing of 206, it is checked whether the current time matches the end time (20
8). If the current time matches the end time, a recording stop signal is sent to the system microcomputer 12 (209), and the process returns to the beginning of the second reserved recording standby routine to process the next reserved program. When the current time does not match the end time, the current time is compared with the start time or the end time and the process waits.

Here, if the current time matches the start time in the second reserved recording standby routine, the recording mode is checked,
If it can be confirmed that it is in the second recording mode, and further if the operation state of the current VTR is checked and it is confirmed that it is in any one of the recording state, the reproducing state and the stopped state, a recording request signal for the other track. Also, it operates so as to send a channel setting signal to the system microcomputer 12. As a result, even though the recording is performed in the first recording mode, the recording is started in the second recording mode, and the second recording mode is set on one side of the plurality of tracks recorded in the first recording mode. By recording another video signal in step 1, it is possible to prevent the video signal in the first recording mode from becoming meaningless. In addition, recording is started in the second recording mode even when reproduction is performed in the first recording mode, and the second recording mode is set on one side of the plurality of tracks already recorded in the first recording mode. By recording another video signal in step 1, it is possible to prevent the video signal in the first recording mode from becoming meaningless.

Scheduled recording-related processing in the second VTR will be described with reference to the flowchart of FIG. First, it is checked whether the power switch is cut off (120). When the power switch is cut off, the first reserved recording standby routine is entered. The processing in the first reserved recording standby routine is the same as the operation of the reserved recording standby routine shown in the flowchart of FIG. If the power is not cut off, the second reserved recording standby routine is entered. The processing in the second reserved recording standby routine is the same as the operation of the second reserved recording standby routine shown in the flowchart of FIG.

Example 2. The block circuit diagram of the second embodiment of the present invention is FIG. 1 used for explaining the operation of the video signal recording / reproducing apparatus of the first embodiment. 1 is a block circuit diagram showing a video signal recording / reproducing apparatus according to an embodiment of the present invention.

Scheduled recording-related processing in the first VTR will be described with reference to the flowchart of FIG. The same reference numerals as those in FIG. 2 indicate the same parts, and the description thereof will be omitted. If the recording mode is not the second recording mode but the first recording mode in the processing of 212, it is indicated that the reserved recording is not executed because the first recording mode is currently being used, for example, the liquid crystal or fluorescent display of the VTR main body. A display device using a tube or LED, or a VTR output signal is superimposed and displayed on a TV monitor to warn (213). After displaying the warning of non-execution of reserved recording, the process returns to the beginning of the second reserved recording standby routine in order to process the next reserved program.

Scheduled recording-related processing in the second VTR will be described with reference to the flowchart of FIG. The same reference numerals as those in FIG. 3 indicate the same parts, and the description thereof will be omitted. If the recording mode is not the second recording mode but the first recording mode in the processing of 212, it is indicated that the reserved recording is not executed because the first recording mode is currently being used, for example, the liquid crystal or fluorescent display of the VTR main body. A display device using a tube or LED, or a VTR output signal is superimposed and displayed on a TV monitor to warn (213). After displaying the warning of non-execution of reserved recording, the process returns to the beginning of the second reserved recording standby routine in order to process the next reserved program.

Checking the recording mode in the above embodiment 2
In the process of 12, even when the recording mode is not the second recording mode but the first recording mode, the current recording mode is the first recording mode and a warning is displayed to warn that reserved recording will not be executed (213 It is needless to say that the user can continue or change the operation by determining whether to give priority to the reserved recording in the second recording mode or the normal operation in the first recording mode.

In the above embodiment, a VTR capable of recording video signals of two channels is taken as an example of a VTR capable of recording a plurality of video signals, but a VTR capable of recording video signals of two or more channels, for example, depending on the number of channels. The number of tuners, video signal processing systems, magnetic heads, frame synchronizers, etc. is increased to record video signals according to the number of channels on the magnetic tape while forming tracks according to the number of channels and recording mode. Even in such a case, it is possible to obtain the effect of preventing meaningless recording in the first recording mode that operates in the same manner as in the above-described embodiment and similarly requires a plurality of recording areas.

For example, N channels (N = 1, 2, 3, ...
··· In a VTR capable of recording video signals of natural numbers), the video signals of M1 channel (M1 = 0 and natural numbers of 1, 2, 3, ...) Are recorded or reproduced in the first recording mode. , I × M1 tracks are used, where I is the number of tracks required for recording in the first recording mode (I = 1, 2, 3, ...).
I × M1 ≦ N). Further, when the video signal of the M2 channel (where M2 ≦ N, M2 = 1, 2, 3, ...) Is recorded or reproduced in the second recording mode, (I × M1 + M2) ≦ N It holds. When recording reservation is started for this state without interrupting recording or playback of the track currently in use, the remaining A = N- (I × M1 + M2) is recorded after subtracting (I × M1 + M2) from the N channel. It is the number of possible tracks. Here, when N = I × M1 + M2, no recording reservation is made because A = 0 and there are no remaining tracks.

Here, the number of reserved programs in which the times reserved in the first recording mode are overlapped is L1 (L
1≤N, L1 = 0 and natural numbers 1, 2, 3, ..., And the number of reserved programs for which the times reserved in the second recording mode overlap is L2 (L2≤N, L2 = 0 and 1,
2, 3, ... Natural numbers). When the number A of remaining tracks is smaller than the number I of tracks required for the first recording mode (A <I), there is no room to record in the first recording mode, so the time set in the second recording mode is set. Of the overlapping reserved program number L2, only channel A can be recorded. Here, when there are a large number of reserved programs whose time overlaps with the recordable track, recording is started with priority, for example, from a reserved program with an earlier recording start time. Then, until the reserved recording start time of the (A + 1) th reserved program is reached, subsequent reserved recording is not performed unless the channel currently being manually recorded or reproduced is changed to the unused state. Further, when the reserved recording start time is set at exactly the same time, the recording is started by giving priority to, for example, the reserved program whose reservation setting has been made later.

When the number A of remaining tracks is equal to or more than the number I of tracks required for the first recording mode (A ≧ I), the first
Of the reserved program numbers L1 for which the times reserved in the recording mode are overlapped, the number of reserved programs for actual recording reservation is L11 (L11 ≦ L1, L11 = 0 and 1, 2, 3, ...). Natural number), and the number of reserved programs for actually making recording reservations is L among the reserved program numbers L2 in which the time set for reservation in the second recording mode overlaps.
22 (L22 ≦ L2, L22 = 0 and 1, 2, 3, ...
The recording reservation is made in such a relationship that (I × L11 + L22) ≦ A 2 holds. This, L
The criteria for selecting L11 reserved programs from all the one reserved programs in the first recording mode and L22 reserved programs from the L2 all reserved programs in the second recording mode are as follows: For example, recording is preferentially started from the reserved program having the earlier recording start time. After all the tracks that can be recorded are filled and before the reserved recording start time of the reservation program is reached, the subsequent reservations will be made unless the currently recording / playing channel is changed to an unused state. No recording is done.
Further, when the reserved recording start time is set at exactly the same time, the recording is started by giving priority to, for example, the reserved program whose reservation setting has been made later. In addition, when the reserved recording is started according to the priority order and the remaining track number A becomes smaller than the track number I required for the first recording mode (A <
The operation of I) is as described above.

In the above-mentioned embodiment, the tracks which can be used for the reserved recording are limited to the tracks in which nothing is recorded or the part in which nothing is recorded. If you can play the video signal once and see it, you can erase it, or if you saw it elsewhere and no longer need it, or if you decided that it was a saved version but you do not need to keep it, etc. It may be possible to record on a recorded track or on a recorded part of the track. In this case, if it is determined that the track is erasable or that the tracks other than the track are not erasable when it is determined that the track is erasable, the track is also recorded as a non-recordable track. In the same manner, it can be used for reserved recording in the same manner as described above. In the above description, the explanation was given simply as the relevant track, but there are cases where there are recorded and non-recorded portions, and erasable and non-erasable portions among the tracks. Of course, the meaning of the part is also included.

As a method of setting erasable or non-erasable, a method of operating the duty ratio of the control track to record information indicating whether or not each track can be erased, or a method of setting each track on a cassette half of a video tape is used. Record or paste the information that indicates the erasability, and
A method of reading with an optical reading device provided on the TR main body side, a method of providing an area for recording information indicating whether or not each track is erasable at the beginning or end of the video tape, or erasing of each track This video tape management system also has a method of providing an independent track for recording information indicating permission / prohibition, or a system for managing all video tapes possessed by the VTR main body and information indicating whether or not each track of all video tapes can be erased. It is possible to use any method as long as it is possible to individually set whether or not erasing is possible, change it, and read the setting.

Even in the case of the VTR capable of recording the video signals of two or more channels, by displaying the judgment result at the stage of judging the execution or non-execution of the reserved recording at the reserved recording start time or before the predetermined time, a warning is displayed. Of course, the user can manually change the operation of the VTR to perform the desired operation.

In the above embodiment, any of the recording mode in the recorded area, the recording mode in the manual recording, and the recording mode in the reserved recording is used for recording the high-definition image signal as compared with the second recording mode. It is also possible to configure the reserved recording so that the first recording mode is prioritized.

[0052]

As described above, according to the first aspect of the present invention, even when the current recording time reaches the recording start time even in the non-reserved recording standby state, the current recording mode is determined and the second recording mode is set. Since the reserved recording operation is performed in the second recording mode and the reserved recording operation is prohibited in the first recording mode, a single video signal is divided during recording in the first recording mode. Only one side can be recorded, or when reproducing in the first recording mode, one side of a plurality of recording areas into which a single video signal recorded is erased is erased. This has the effect of preventing the recorded single video signal from becoming meaningless.

According to the second aspect of the present invention, even if the current recording time has reached the recording start time even in the non-reserved recording standby state, the current recording mode is judged and the second recording mode is selected. For example, the reserved recording operation is performed, and if the first recording mode is set, the reserved recording operation is prohibited, and a message to that effect is displayed and a warning is issued. Therefore, a single video signal is divided and recorded in a plurality of recording areas. However, or because a single video signal has already been divided and recorded in multiple recording areas, a warning is displayed and a warning is given to the user to indicate that reserved recording will not be performed. There is an effect that a desired operation can be performed by changing the operation.

[Brief description of drawings]

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

FIG. 2 is a flowchart illustrating a reserved recording-related operation of the video signal recording / reproducing apparatus according to the embodiment of the invention of claim 1;

FIG. 3 is a flowchart illustrating a reserved recording-related operation of a video signal recording / reproducing apparatus according to another embodiment of the invention of claim 1.

FIG. 4 is a flowchart illustrating a reserved recording-related operation of the video signal recording / reproducing apparatus according to the embodiment of the invention of claim 2;

FIG. 5 is a flow chart for explaining a reserved recording-related operation of the video signal recording / reproducing apparatus according to another embodiment of the invention of claim 2;

FIG. 6 is a block circuit diagram showing a conventional video signal recording / reproducing apparatus.

FIG. 7 is a reserved recording information display screen for explaining the operation of the conventional video signal recording / reproducing apparatus.

FIG. 8 is a timetable of a reservation program for explaining the operation of the conventional video signal recording / reproducing apparatus.

FIG. 9 is a flowchart illustrating a reserved recording-related operation of a conventional video signal recording / reproducing apparatus.

FIG. 10 is a flowchart illustrating a reserved recording-related operation of a conventional video signal recording / reproducing apparatus.

[Explanation of symbols]

 1 1st tuner 2 1st video signal processing system 3 1st output terminal 4 1st magnetic head 5 magnetic tape 6 2nd tuner 7 2nd video signal processing system 8 2nd output terminal 9 2nd Magnetic head 10 memory circuit 11 timer microcomputer 12 system microcomputer 13 external operation panel 14 switching circuit 15 frame synchronizer 16 control head 17 detection circuit 51 first track 52 second track 53 third track 54 control track

Claims (2)

[Claims] 1. A recording / reproducing circuit having a first recording mode in which a single video signal is divided and recorded in a plurality of recording areas and a second recording mode in which a plurality of video signals are recorded in a plurality of recording areas. A storage circuit that stores reservation information such as recording start date and time and recording end date and time of a plurality of signal sources; and a control circuit that controls the operation of the recording circuit by comparing the reservation information in the storage circuit with the current date and time. And a means for comparing the reservation information with the current date and time even when not in the reserved recording standby state, a means for determining the current recording mode, and a means for performing the reserved recording operation based on the result of the determination. Video signal recording / reproducing device. 2. A recording / reproducing circuit having a first recording mode in which a single video signal is divided and recorded in a plurality of recording areas and a second recording mode in which a plurality of video signals are recorded in a plurality of recording areas. A storage circuit that stores reservation information such as recording start date and time and recording end date and time of a plurality of signal sources; and a control circuit that controls the operation of the recording circuit by comparing the reservation information in the storage circuit with the current date and time. A means for comparing reservation information with the current date and time even when not in the reserved recording standby state, a means for judging the current recording mode, a means for performing a reserved recording operation based on the result of this judgment, and a judgment for executing reserved recording. And then
A video signal recording / reproducing apparatus comprising means for displaying the result and giving a warning.