JPH01208752A - Picture recorder capable of simultaneous recording for plural channels with reservation device - Google Patents

Abstract

PURPOSE:To simultaneously record plural video signals in accordance with reservation by providing the 2nd recording mode in which plural kinds of video signals are simultaneously recorded and making the 2nd recording mode executable when reserved picture recording times are piled on one after another. CONSTITUTION:The 1st recording mode in which video signals of one of tuners 67 and 68 are recorded and the 2nd recording mode in which the outputs of the tuners 67 and 68 are simultaneously recorded are provided and a timer microcomputer 60 controls reserved recording. A recording/reproducing block 66 can simultaneously record two kinds of video signals and a system microcomputer 65 controls the operation of the recording circuit 66 by comparing reservation information and the current time with each other and, when one kind of video signals are recorded in a reserved state, selects the 1st recording mode. When plural kinds of video signals are to be recorded in a reserved state, the microcomputer 65 selects the 2nd recording mode. Therefore, even when reserved picture recording times are piled up one after another, video signals of plural channels can be recorded.

Description

[Detailed description of the invention] H) Industrial application field The present invention is directed to a multi-channel simultaneous recording V' with a company motto reservation device.
l'R1=Related.

(b) Conventional technology Japanese Patent Application Laid-open No. 1594 (HD4N7/16)
shows a method of transmitting two video signals using one transmission line. The applicant applies this technology to a VTR (video tape recorder) that can record/play back video signals of multiple channels.
Previously filed application (%Application No. 175557/1982) 0 Also, it has become common for recent VTRs to have a recording reservation function.

A normal home VTR cannot record multiple video signals at the same time. Therefore, it is necessary to take some measures to prevent the time slots of recording reservations from overlapping.

For example, Special Publication No. 58-58869 (HO4N5/44)
shows a configuration that issues a warning if the time zones overlap.

(c) Problems to be Solved by the Invention The present invention aims to provide a recording reservation device that can effectively utilize a VTR capable of recording video signals of a plurality of channels.

B.) Means for Solving the Problems In order to achieve the above object, the present invention provides a recording circuit having a first recording mode for recording a single video signal and a second recording mode for simultaneously recording a plurality of video signals. a memory means for storing start times and end times corresponding to a plurality of video signal sources; and a control means for controlling the operation of the recording circuit by comparing the reservation information in the storage memory means with the current time. In the video tape recorder, the first recording mode is selected when a single video signal is scheduled to be recorded, and the second recording mode is selected when a plurality of video signals are scheduled to be recorded.

Furthermore, in the present invention, when the recording mode of WJ1 is changed to the second recording mode during scheduled recording, the video signal recorded in the first recording mode (; A recording position setting means for recording at a predetermined position is provided.

The present invention also provides a means for determining a portion recorded in the second recording mode during reproduction, and a means for determining the portion recorded in the second recording mode when the portion recorded in the first recording mode changes to a portion recorded in the second recording mode. It includes means for giving priority to reproducing video signals at predetermined positions.

Furthermore, the VTR of the present invention is provided with means for displaying that the second recording mode will be executed if recording time periods overlap when setting reservation information in the storage memory means.

(E) Effect Therefore, according to the present invention 1, when the time slots for scheduled recording overlap, the second recording mode is executed, and multiple video signals can be reserved (: therefore, simultaneously recorded). 0 Furthermore, when setting a reservation, in such a case 1: Since the second recording mode is selected, the user can take actions such as changing the reservation, if necessary.

Then, when the first recording mode is changed to the second recording mode, the continuously recorded video signal is recorded at a predetermined position; therefore, during playback, it is recorded in the first recording mode. The video signal that has been previously stored can be continuously played back without interruption. (F) Embodiment Hereinafter, in Drawing C; an embodiment will be described. FIG. 1 is a block diagram of the embodiment, FIG. 2 is an explanatory diagram for explaining the state of recording, and FIGS. 3 to 5 are flowcharts showing the operation. Moreover, FIG. 6 is a block diagram showing the recording/reproducing block,
7 and 8 are waveform diagrams for explaining the operation, and FIG. 9 is a diagram showing various playback screens.

In FIG. 1, (61) is a timer microcomputer;
) is a setting means, (62) is an indication means, (63) (64)
(65) is a system microcomputer for controlling the VTR, (66) is a recording/playback block, (67) and (68) are first and second china, respectively.

The recording/reproducing block (66) is capable of simultaneously recording 122 types of video signals, as will be described later.
This control is performed by the system microcomputer (65). A first recording mode in which one of the tuners (67) and (68) records a video signal, and both tuners (67)
It has a second recording mode that simultaneously records the output of and a second playback mode for playback.

A timer microcomputer (60) controls scheduled recording.

That is, it controls the setting of scheduled recording, and the start and end of scheduled recording.

Reservation setting is performed as shown in FIG. 1. The timer microcomputer (60) is set to reservation setting mode. and,
A reservation is set by the user using the setting means. The information set includes the recording channel, month and day, start time, and end time. When the input of one piece of reservation information is completed (70), it is checked whether there is any overlapping portion (double portion) in the reservations (71). If not, it is necessary to judge whether the setting mode is to be terminated 72), and if it is to be terminated, it is to be terminated (73), and if it is not to be terminated, the next reservation information input 7 is entered.

If a plurality of child contracts are set and they overlap in time, the second mode recording will be executed and the display means (74) will display them from the second time.

The specific ζ2 side will be explained. As shown in Figure 2, A
I made a reservation for the program from 9:00 to ii:6°,
If the program B is reserved from Y1):Do to 13:00, both programs A and B will be recorded simultaneously from 1):00 to 1):30. At this time, as will be explained later, each program is compressed on the time axis and recorded on the same screen (; two video signals are recorded, and an ordinary VTR cannot reproduce only one program. Therefore, the user is notified that the second recording mode will be selected.

The user (reservation setter) can change the reservation settings based on this display. For example, this display (- even if you do not notice it, there will be no problem since two programs are recorded. Possible light display methods include LED, LCD, etc. display, buzzer, voice synthesis, or on-screen display. When the display shows simultaneous recording of two video signals, if the user wants to change it, he/she can operate the C input button (69) within a predetermined time after the display appears.By doing this, For example, when making a reservation, information set later will be prioritized, and simultaneous recording will be canceled.
The display also disappears. When the switch (69) is operated again, settings are made for simultaneous recording. These controls are performed by checking the state of the switch (69) by the timer microcomputer (60).

C:, which actually executes the reservation recording, is the timer microcontroller (
60) (VTR) is placed in standby mode. In standby mode, the timer microcontroller (60) uses memory (63)
Compare the time data written in (64) (assuming that the month and day data match) and the current time to check whether they match (80).Next (2) Matched data 81), and for the start time, select the channel reserved for the Nayuna you are listening to.
Already C; Please check if recording is running.8
2) If it has not been done, the system microcomputer (65)
For example, the recording/4'5 raw block is set to the first recording mode 1 unit to record video signals of 9 channels.
; Instruct (83).

If recording has already been executed, the second recording mode is set (84) and simultaneous recording of two video signals is executed.

Then, compare with the current time (80) (: Return.

Next, if the matching data is the end time, determine the recording mode at that time (85), if it is the first recording mode, end it (86), and if it is the second recording mode, start the first recording. mode (87) o At this time, it is natural that the recording operation for the channel whose end time has come is ended. By the above operations, recording as shown in FIG. 2 is performed.

Finally, as shown in FIG. 2, when some of the child records overlap, switching between the first recording mode and the second recording mode is performed. Now, considering the convenience when playing back a tape on which such recording has been performed, when the first recording mode → the second recording mode is changed, the video signal recorded in the first mode is transferred to the second recording mode. It records at a predetermined position in recording mode.

In other words, A in Figure 2 (a) or B in (b)
As shown in the left side of the compressed screen (: the video signal that is continuously recorded is placed.
When playing back a tape that has undergone such mode switching, priority can be given to the continuously recorded video signal.

Furthermore, in the portion where simultaneous recording is being performed, the duty of the control signal is different from normal. Therefore, by checking the duty of the control signal during reproduction, it is possible to determine whether or not it is a double recorded portion. Other methods can be used to identify duplicate recordings. For example, it is conceivable to record a low frequency signal using a full-width erasing head at the beginning and end of the double recording section 1.

Then, actual reproduction is performed as shown in FIG.

Control during playback is mainly executed by the system microcomputer (65). In the playback mode, it is checked whether there is a double recording part using the method described above (90
), otherwise the first playback mode is executed (9
2). If it is a double recorded portion, the second reproduction mode is executed (91).

By the way, this second playback mode basically expands the time axis of the video signal that has been compressed to half as described below, but unless there is an external instruction, the compressed video signal will be selected on the left side of the screen. It has become. As mentioned above, this screen on the left is the location where the video signal that is continuously recorded from the first recording mode is located when switching from the first recording mode to the second recording mode. Even with tapes, it is possible to automatically reproduce the recorded content while maintaining its continuity.

Next 1: About the recording/playback block (66) Figure 6~
This will be explained according to FIG.

FIG. 6 shows an example of a VTR that uses a two-channel video recording system.

In order to simultaneously record the video signals of two channels (=, one frame of one channel's video 'N v A (7th
A frame memory (1) that can write and simultaneously read the image (Fig. (a)) in one frame cycle and the video signal VB (Fig. 97 (d) for one horizontal scanning line of the other channel) is used.
)) is equipped with a line memory capable of writing and simultaneously reading data at the cycle of one horizontal scanning period, and the writing and reading operations of both memories are controlled by a memory controller (3).

A demodulation processing circuit (4) for processing the first video signal VA is connected to the input side of the frame memory (1) via a memory controller (3), and a demodulation processing circuit (4) for processing the first video signal VA is connected to the input side of the line memory (2). 2. A memory controller (3) is connected to a demodulation processing circuit (5) that processes the video signal VB.
A modulation processing circuit (6) for processing the composite compressed signal is connected to the output side of the line memory (2+) via a first changeover switch c!A.

The first video signal VA is connected to the demodulation processing circuit (4) through the contact a of the second changeover switch (4η), and the second video signal VB is connected to the demodulation processing circuit (4) through the contact a of the third changeover switch (decoy). 51.

The signals connected to each demodulation processing circuit (41 (51) pass through L P F (8191) to be converted into a luminance signal Y (1m), and pass through B P FQGQII to separate a chroma signal.

Both chroma signals are respectively supplied to the chroma demodulator [13 (131). Furthermore, each demodulation output is supplied to L P F (14 (161
is converted into a color difference signal (R-Y), and the L
The signal passes through the PFG and is converted into a color difference signal (B-Y).

A luminance signal Y and a pair of color difference signals (R-Y) and (B-
Y) is clamped by the clamp circuit θ stage G in accordance with the dynamic range of the A/D converter (221G! Signals AA and AB are created.

The serial video signals AA and AB are converted to digital video signals DA and DB via an A/D converter (221 (23).
ζ = After being converted, tE- is supplied to the memory controller (3) and line memory (2), respectively.

Further, the first and second video signals VA and VB pass through a synchronization separation circuit C, t+4, and a synchronization signal is separated, and the synchronization signal is
FO circuit +2? ) is converted into a horizontal drive pulse HD and a vertical drive pulse VD. Both drive pulses HD,,V
D is further connected to the field discriminating circuit to create a discriminating signal ○E indicating whether the n fields constituted by the video signals VA and VB are odd or even fields. The discrimination signal OE and both drive pulses HD and VD are supplied to C: memory controller (3).

In addition, both demodulation processing circuits (41 (51) horizontal synchronous drive pulse HD1 vertical synchronous drive pulse VD and field discrimination signal ○E are used to synchronize video signals read from frame memory (1) and line memory (2) as described later). This is for the purpose of achieving this.

The memory controller (3) is a frame memo') (1
) and commit/read control signal O to line memory (2)
A.

Reading and writing operations 7 of both memories are controlled by sending OBi.

The second digital video signal DB is a line memo January 2
) is written at a cycle of one horizontal scanning period, it is simultaneously read out at twice the speed of writing to C5, and is connected as a compressed signal DB to one large output end of the first changeover switch group.

Further, the first digital video signal DA is a memory controller)
While being written to o-9 (31) at a cycle of one frame period, it is read out at twice the writing speed under the read timing adjustment by the memory controller +31 (to be described later), and is then read out as a compressed signal DA'. The connection to the other input terminal of the first changeover switch ω is incorrect. As a result, frame memory (1
The video signal read from the line memory (2) and the video signal read from the line memory (2) are synchronized with each other, and the odd/even number of fields to be formed by each video signal and the line number match.

The first changeover switch (7) is a memory controller (3).
) is sequentially switched to the input terminal of the compressed signal D A', the input terminal of the compressed signal D B', and the ground terminal in one horizontal scanning period, and as described later, each horizontal scanning The first half of the line has two compressed signals DA', the second half C: the compressed signal DB', and a predetermined position I: horizontal and vertical blanking periods are formed to generate two channels of video signals. The composite compressed signal DX is outputted from a D/A converter ctnoa.
After passing through (c) and replacing with 5 series analog signals, it passes through the first LPFC 34) to create the luminance signal Y. 1
), a pair of color difference signals (RY) and (B-Y
) are generated and are supplied to the chroma modulator (2) and replaced with the chroma signal C, and then sent to the first addition circuit Gl.
0 to be mixed with the luminance signal Y. Furthermore, to the chroma modulator (to), connect the output end of the pulse creation circuit 01 that creates the frang pulse and burst gate pulse for clamping both color difference signals. are doing. First addition circuit (4
The output signal of 1 is further connected to a second adder circuit 2, which inserts a composite synchronization pulse S obtained from the memory controller (3) at a predetermined position. As a result, a composite video signal VX having the same format as a normal double video signal is obtained.

The composite video signal VX, the fourth changeover switch (44 input switch a, the AGO circuit (14), the recorded video processing circuit (
The information is recorded on a magnetic tape after passing through the four tapes and a magnetic head (7).

It is also possible to reverse the processing for the image signals VA and VB by switching the second changeover switch (47) to the b contact and the sixth changeover switch (c) to the a contact.

The composite video signal vx', which is reproduced from the magnetic tape on which the composite video signal VX is recorded, via the magnetic head (7) and the reproduced video processing circuit (46), is generated by, for example, 9 points of the fifth changeover switch (1 of 43). It is possible to output to a monitor device via .

In addition, the horizontal time axis of the input signal h is doubled by switching the processing/reading control of the memory controller (3) for the demodulation processing circuit (5), line memory (2), and modulation processing circuit (6). By configuring a time axis expansion circuit that enlarges and outputs the composite video signal vxH, and connecting it to the demodulation processing circuit (5) via the C contact of the composite video signal vxH (481), the original video signals VA and VB It is possible to select and restore only one of the video signals, and then switch the original signal to the fourth changeover switch (47J a,
It is possible to display only the desired image by outputting it to the monitor device via the m point and the 5th switching switch (43 a contact). A method of recording stereo audio tracks separately can be adopted.

Below, the operation of the memory controller (31) will be described in detail based on FIG. 7 and FIG. It is expressed in terms of

Created by synchronously separating the video signal VA -fc Fig. 7 (b
When T1 is the period from the rise of the horizontal drive pulse of 1 to the start point of the video signal, and TW is the video signal period, the memory controller starts the signal after a T1 period delay from the rise of the horizontal drive pulse as shown in Figure fJ7 (C1).・Create a write pulse with a width TW that is irregular, and use this pulse to
Write the signal VA to the frame memory (:).

In addition, Fig. 7 (I) created by synchronously separating the video signal VB
Based on the period T1 from the rising edge of the water-drying motion pulse to the start point of the video signal in B), the video signal period T W l: Based on this, the memory controller creates the write pulse shown in FIG. 7(f), and uses the pulse to When reading the 0 signal that writes the video signal VB to the line memory, the memory controller writes the video signal VB to the line memory as shown in FIG.
), the horizontal drive pulse (
w'r r ('1' r = T W / 2) becomes high level after T2 period delay from the rising edge of FIG. 7(e))
A read pulse is created, and the video signal VA is read out from the frame memory at twice the speed.

As a result, the compressed signal shown in FIG. 7(h) is obtained. At the same time, the memory controller detects the rising edge of the horizontal drive pulse (FIG. 7(θ)) based on the video signal VB as shown in FIG. 7(1). After a delay of T2 period, with No Ireperu;
A read pulse of 18 Tr is created, and the pulse is used to read the video signal from the line memory at a speed 72 times faster than the video signal VB.

As a result, the compressed signal shown in FIG. 7 (j3 is obtained. In this case, the period T2, which is the read timing of the video signal VA from the frame memory, is the end of the compressed signal of the video male signal VA (FIG. 7 A)). and the compressed signal of the video signal VB (Fig. 7 (j
)) is set to be at the same point in time.

Both of the compressed signals mentioned above are converted into the composite compressed signal shown in FIG. 7(k) through the first selector switch, and the composite synchronizing pulse shown in FIG. 7(1) is further inserted in the adder circuit (41J). By doing so, the composite video signal shown in FIG. 2(m) is created.

FIG. 8 shows a series of signal waveforms when the original video signal VA or VB is restored from the magnetic tape on which the composite video signal is recorded.

When restoring the video signal VA, the period F from the rise of the horizontal drive pulse to the start point of the composite video signal in FIG. 8(n) created based on the composite video signal in FIG. 8(III)
<T'4, and when the video signal period is TW (TW-TW/2), the memory controller becomes high level with a delay of T4 period from the rise of the horizontal drive pulse as shown in FIG. 8 (0). A write pulse with a width Tw is created, and the first half of the composite video signal is written into the line memory using the write pulse.

At the time of signal reading, the memory controller
) As shown in C, a read pulse having a width Tr delayed by T5 period from the rise of the horizontal drive pulse is created, and the first half of the composite video signal is read out from the line memory at a speed of 172. As a result, the enlarged signal shown in FIG. 8(q) is obtained.

The enlarged signal is passed through the adder circuit (4I) as shown in FIG.
By inserting the composite synchronization pulse r), the restored video signal shown in FIG. 6(8) is created.

In addition, when restoring the video signal VB, the period from the rise of the horizontal drive pulse to the center point of the composite video signal is 'r'.
d (T6-T4+Tw), the memory controller creates a write pulse with a width TW that becomes high level after a T6 period delay from the rise of the horizontal drive pulse as shown in FIG. 8(1), and pulse 1: Therefore, the latter half of the composite video signal is written into the line memory.

When reading the signal (=, the memory controller
u) As shown in C, create a sinking pulse with a width Tr' delayed by T7 period from the rising edge of the horizontal drive pulse, and
- Therefore, the second half of the composite video signal is extracted from the line memory by 1
Read at a speed of /2. As a result, the enlarged signal shown in FIG. 8(V) is obtained.

The enlarged signal passes through the adder circuit circle as shown in FIG. 5 (tI+
) by inserting the composite synchronization pulse shown in Fig. 3 (
A restored video signal of X) will be created.

According to the circuit shown in Fig. 1, the two-channel images shown in Fig. 9 (a) and (b) are distributed to the left and right sides of the screen, respectively, as shown in Fig. After being synchronized with each other, they are combined into a single image and recorded as shown in (θ) in the same figure.Therefore, when reproducing the signal, the combined screen of (e) and l in the same figure is displayed on the side. Not only is it possible to
As shown in FIGS. 4(f) and 4(g) (=), various types of bat collections and displays are possible.Furthermore, the screen of FIG. 4(a) or C'b) can be selectively displayed.

Now, in this recording/playback block (66) l2, the first
The video signal VA is the output of the tuner (67), and the second video signal VB is the output of the tuner (68). In the first recording mode, under the control of the system microcomputer, the tuner output (for example, the first video signal) of the tuner that is selecting a predetermined channel is selected and recorded by the fourth changeover switch. In the first playback mode that corresponds to C:, the fifth changeover switch (,1:
3(: twist terminal (D) is selected, and the playback output is supplied as is to the monitor TV.

In the second recording mode, C: compression and synthesis of video signals are performed as described above. Selection of the position in this case is performed by controlling the second changeover switch (47) and the third changeover switch f481. In the case of FIG. 6, the first video signal is arranged in the first half of the horizontal period, and is a video signal that is continuously recorded from the first recording mode.

In the second playback mode relative to the second recording mode, the playback output can be selected by the sixth changeover switch (481), and normally the first half of the horizontal period is enlarged and output. Continuity of recorded content is maintained during playback.

FIG. 2C: When recording is performed as shown, according to the embodiment, program A is first reproduced to the end. After this, the user who wants to play program B must rewind the tape. This control can be performed automatically using the identification of double recorded portions. In other words, when a double recorded part exists, after the double recorded part is finished, the tape is rewound to the beginning of the double recorded part automatically or based on the user's instructions, and the one that was not played is The signal is expanded and output.

Although the above embodiment is a two-channel case, it is possible to realize a simultaneous broadcast recording apparatus having six or more channels.

(G) Effects of the Invention As described above, according to the present invention, multiple video signals can be recorded at the same time even when the reservation time slots overlap, so that the user's reservation intention (7a1) is not impaired. .

Furthermore, in the present invention, when the first recording mode is changed to the second recording mode, the image signal that was not recorded in the first recording mode is recorded at a predetermined position in the second recording mode. By giving priority to this during playback, continuity of the recorded content can be maintained.

Furthermore, in the present invention, when there are many reservations, this is displayed to the user, so that he can take measures such as changes if necessary, which is effective.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the embodiment, FIG. 2 is an explanatory diagram showing the state of recording, and FIGS. 6, 4, and 5 are flowcharts showing operations. FIG. 6 is a block diagram showing a recording/reproducing block, FIGS. 7 and 8 are waveform diagrams for explaining the operation, and FIG. 9 is a diagram showing a glazed reproduction screen. (60)...Timer microcomputer, (61)...Setting means, (62)...Display means, (63) (64)
...Memory, (65) ...System micro y, (6
6)... Recording/playback book, (67) (68)...
・Tuner.

Claims (4)

[Claims] (1) a first recording mode in which a single video signal is recorded;
A recording circuit having a second recording mode for simultaneously recording a plurality of video signals, a memory means for storing start times and end times corresponding to a plurality of video signal sources, and reservation information and current time of the memory means. and a control means for controlling the operation of the recording circuit by comparing the two video signals, the first recording mode is selected when a single video signal is reserved for recording, and the second recording mode is selected when a plurality of video signals are reserved for recording. A multi-channel simultaneous recording device with a reservation device that allows you to select recording modes. (2) When the first recording mode is changed to the second recording mode during scheduled recording, the video signal recorded in the first recording mode is transferred to a predetermined position in the second recording mode. 2. A multi-channel simultaneous recording device with a reservation device according to claim 1, further comprising recording position setting means for recording. (3) means for determining a portion recorded in the second recording mode during playback, and when the portion changed from the portion recorded in the first recording mode to the portion recorded in the second recording mode; 3. A multi-channel simultaneous recording device with a reservation device according to claim 2, further comprising means for preferentially reproducing the video signal at the predetermined position. (4) When setting reservations and information in the memory means, if the reservation time slots overlap, a display means is provided for displaying that the second recording mode will be executed. A multi-channel simultaneous recording device with a reservation device as described in Section 3.