JPH0831224B2 - Program reservation method - Google Patents

Description

The present invention relates to a program reservation method for a video tape recorder (VTR), and more particularly to a video tape capable of timer reservation recording by VPS and reservation recording at different tape speeds. It relates to a program reservation method for a recorder.

(B) Conventional technology In West Germany, a program reservation system called VPS (Video Program System) has been widely adopted for VTRs.

This VPS is a system that uses the control signal (VPS code) that is sent by superimposing it on the TV broadcast wave to accurately make the recording reservation of the VTR. It is a TV broadcasting station in West Germany at the end of August 1985. More services have been started.

In ordinary absence recording, the user stores the recording start time and the end time in the VTR in advance, and the start and end of the recording are automatically controlled according to the built-in clock. Therefore, when the broadcast program is changed, the beginning part of the program cannot be recorded, or a completely different program may be recorded. Different from Japan, the broadcast time of broadcast programs is changed relatively frequently in foreign countries, so there are many shortcomings and it is not practical to record with only the built-in clock. Therefore, if VPS is used, even if the broadcast time of a previously announced program changes, it will be added and sent for each program.
The VPS label (identification information for each program) reliably controls the recording operation by the program itself, so that it is recorded correctly when the broadcast time is changed.

By the way, the VTR currently on the market is backing up the timer reservation contents as a measure against power failure.

That is, for example, suppose that the program 1 is set so that a program on channel 8 is reserved for recording between 19:00 and 21:00 with the tape speed set to the LP mode.

Then, the reserved recording start time (19: 0
At 0), the standard tape speed (SP) changes to the reserved tape speed (LP). Then, the tape speed when the recording was interrupted due to a power failure etc. on the way and the recording was restarted was not the tape speed at the time of reservation,
The tape speed (SP) is stored in the EE state (monitor state before recording).

In the case of FIG. 3 described above, it is conceivable that the tape speed when the power is restored and the recording is restarted should be the reserved tape speed (LP), but in that case, the following problems occur. .

That is, for example, it is assumed that the program 1 is set so that a program on channel 8 is recorded between 19:00 and 21:00 while the tape speed is set to the SP mode and reserved recording is performed.

Then, the reserved recording start time (19: 0
0) At point A, the tape speed (EP) changes to the reserved tape speed (SP), but if the user then intentionally changes the tape speed from SP to LP (this is in the EE state) The tape speed has changed)
[Point B] After that, if the reserved recording is interrupted due to a power failure,
When the reserved recording is resumed thereafter, the tape speed becomes the reserved tape speed (SP) instead of the tape speed (LP) changed by the user.

In other words, if the tape speed when the power is restored and recording is restarted is set to the reserved tape speed, the user can change the tape speed from SP to LP at the time of the first reservation, even if the user intentionally changed the tape speed from SP to LP. Tape speed (SP)
Will return to. In order to avoid such a situation, the current
How the VTR looks like will be explained with reference to FIG. 5 using the same example as in FIG. 4. As shown in FIG. 5, when the reserved recording start time (19:00) [point A] is reached, the tape speed is (E
If the user deliberately changes the tape speed from SP to LP after changing from P) to the reserved tape speed (SP) (this means that the tape speed was changed in the EE state) [B Point], after this, if the reserved recording is interrupted due to a power outage or the like, the tape speed when the reserved recording is resumed afterwards should be the tape speed (LP) changed by the user first, not the reserved tape speed. In this way, the tape is recorded at the tape speed intended by the user.

(C) Problem to be Solved by the Invention However, with this method, when timer reserved recording by VPS is performed, the following drawbacks occur.

Now, program 1 has 8 channels from 14:00 to 15:
It is assumed that VPS timer reservation recording is performed as tape speed SP up to 00, and VPS timer reservation recording is performed as channel 2 as tape speed LP as program 2 from 15:00 to 15:30. If there is only one timer reservation, even if the VPS interruption code is interrupted after the timer reservation is executed once, it can be dealt with by the method described in Fig. 5 above. In some cases, reserved recording cannot be performed at a desired tape speed for the reason described below.

That is, the program 1 is executed at the tape speed SP at 14:00, but the reserved recording of the program 1 is interrupted by the VPS interruption code in the middle of this reserved recording, and while doing so, the program is started from 15:00. Suppose that the scheduled recording of 2 was executed at tape speed LP and ended at 15:30.
Then, after a while, when the reserved recording of the program 1 is restarted by retransmitting the VPS code, the tape speed of the reserved recording of the restarted program 1 is not the SP set as the program 1 but the last executed tape. The speed becomes LP, and there is a drawback that the reserved recording of the program 1 is performed at two tape speeds.

Accordingly, the present invention seeks to overcome such drawbacks.

(D) Means for Solving the Problems The present invention is a video tape recorder capable of timer reserved recording by VPS and reserved recording at different tape speeds. In order to solve the above problems, a first VPS timer is provided. During the scheduled recording execution, the VPS timer scheduled recording is interrupted due to VPS interruption code, power failure, etc. After this interruption, the second VPS timer scheduled recording is executed, and then the first VPS timer scheduled recording is resumed. In this case, the tape speed at the time of the interruption is stored in the storage means, and the restarted first VPS timer reserved recording is executed at the tape speed stored in the storage means. This is a program reservation method.

(E) Operation According to the above configuration, even if the reserved recording is interrupted by the VPS interruption code, the reserved recording can be executed at the predetermined tape speed before the interruption when resuming.

(F) Embodiment One embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 2 shows a program reservation system adopting VPS.

The reservation storage circuit 6 stores the operation information of the reservation button group 4 operated according to the reservation setting and displays it on the display means 9. This reservation code consists of information consisting of recording start time (recording start code), reserved channel, availability of VPS reservation and recording end time (or recording time), and the same information as program reservation at normal time. There is. The reservation storage circuit 6 also stores the output of the VPS switch 5, and distinguishes and stores the VPS reservation mode by the VPS system and the normal reservation mode by the normal time. Therefore, in the VPS reservation mode, the broadcast code of the reserved channel is detected and the corresponding program is recorded without being restricted by the recording start time and recording end time of the reservation code. In the normal reservation mode, the actual time and the reservation code are compared. Recording will be performed from the recording start time set by to the recording end time. In addition, VPS
The code includes a code related to the program start time (program start code), a code indicating that the program has been interrupted (program interrupt code), and a code related to control.

The reservation execution mode will be described below. In the VPS reservation mode, the real time information of the clock circuit 11 is compared with (the recording start time of) the reservation code of the reservation storage circuit 6, and if they match, the power supply circuit 14 is energized.
The tuner 2 of R is operated, and a reserved channel is selected from the broadcast signal obtained from the antenna 1 based on the output of the channel selection circuit 12. The video signal of the reserved channel is input to the VPS decoder 3 and the VPS code is decoded. When the VPS code is present, the VPS code is stored in the data memory 7. Reservation code (start time) and stored VPS
The code (the start time of the program in the middle) is compared in the reservation coincidence determination circuit 8, and when the coincidence output is generated, the timer control circuit 10
Activates the power supply circuit 14 and activates the recording means 16 to start recording. As a general rule, this recording is executed during a period in which a transmission code (the start time of the program inside) that matches (the recording start time of) the reservation code is generated, and the VPS reservation mode for correctly recording the desired program is executed.

On the other hand, if the reserved channel is a channel in which the VPS code is not multiplexed, the VPS code is not stored in the data memory. Therefore, the reservation matching circuit 8 detects that the transmission code is not stored in the data memory 7, compares the reservation code (recording start time thereof) with the actual time of the clock circuit 11, and the actual time matches the start time. When the timer control circuit
The power circuit 14 is activated by activating 10. As a result, recording on the reserved channel is started at the recording start time. After the start of recording, the reservation coincidence determination circuit 8 compares the recording end time in the reservation code with the actual time. When a coincidence output is generated by the comparison, the timer control circuit 10 is deactivated and the power supply circuit 14 is deactivated. Therefore, in the normal reservation mode described above, recording is performed according to the time of the reservation code and the reservation channel. Even if the transmission code is multiplexed on the reserved channel, the VPS switch 5
Is set to PFF to set the normal reservation mode, the normal reservation mode described above is executed regardless of the output of the data memory 7.

Further, 15 is a tape speed switch, and by turning on / off this switch 15, the tape speed at the time of reserved recording can be switched to SP and LP.

A portion 20 surrounded by a broken line in FIG. 2 is composed of a microcomputer.

When the VPS decoder detects an interruption code in the VPS codes during execution of the VPS reservation recording, the interruption code is stored in the data memory 7. When the data discrimination circuit 13 detects the interruption code in the data memory 7 (judging that the reservation is interrupted by the VPS code) ((S ₁ ) in FIG. ₁ ),
The timer control circuit 10 is controlled to stop the timer recording, and the reservation storage circuit 6 is made to store the tape speed at the time of the interruption by the interruption code ((S ₂ ) in FIG. 1). If the timer recording is interrupted due to something other than the VPS code, the tape speed at the time of the interruption is not stored.

If it is determined that the reserved recording has been resumed after the reservation recording is interrupted ((S ₃ ) in FIG. 1), the reservation recording is restarted.
It is judged whether or not the interruption of the reserved recording by the VPS code is restarted ((S ₄ ) in FIG. 1). At this time, whether or not the reserved recording by the VPS code is restarted is performed by the data discrimination circuit 13 detecting the VPS code transmitted again after the interruption. If it is determined in step 4 that the restart is by the VPS code, the tape speed of the restarted reserved recording is changed to the tape speed stored in the reserved storage circuit in step 5 (S ₅ ). Further, when it is determined not to be restarted by the VPS code in step 4, it is caused to change the tape speed of the resumed programmed recording in EE at the stored tape speed (of FIG. 1 (S _6)).

As described above, according to the present invention, a plurality of timer recordings by VPS are reserved, and even if an interruption occurs or a power failure occurs, each reserved recording can be executed at a desired tape speed, Even if the user intentionally changes the tape speed, recording can be performed at the tape speed based on the user's intention. Of course, normal VPS
Even in a timer recording system such as the one described above, it is possible to execute at a desired tape speed.

(G) Effect of the Invention As described above, according to the present invention, even if a plurality of timer recordings by VPS are reserved, each reserved recording can be executed at a desired tape speed.

[Brief description of drawings]

FIG. 1 is a diagram showing a flow chart for explaining the operation of a video tape recorder embodying the present invention, and FIG. 2 is a block diagram of a main part of a video tape recorder embodying the present invention, FIGS. 5 and 6 are diagrams showing examples of program reservation, respectively. 3 ... VPS decoder, 6 ... Reserved recording circuit, 7 ... Data memory, 13 ... Data discrimination circuit.

Claims (1)

[Claims] 1. A video tape recorder capable of timer reserved recording by VPS and reserved recording at a different tape speed, wherein the VPS timer reserved recording is interrupted by a VPS interrupt code during execution of the first VPS timer reserved recording. Occurs, and when the first VPS timer reserved recording is restarted after the second VPS timer reserved recording is executed after this interruption, the tape speed at the time of the interruption is stored in the storage means. A program reservation method for storing and executing the resumed first VPS timer reservation recording at the tape speed stored in the storage means.