JPS6350277A - Circuit for switching picture recording mode - Google Patents

Abstract

PURPOSE:To use a video program system VPS by storing a program code among VPS codes by interlocking with the setting operation of the video program system VPS, comparing said code with program codes inputted consecutively among the VPS codes and controlling a picture recording state. CONSTITUTION:With a VPS setting switch SW1 closed, a VPS mode setting circuit 10 puts out the output of setting the VPS recording when the output of detecting the VPS code and the output of setting a picture recording are put out. A write pulse generator circuit 12 inputting the output of setting the VPS picture recording generates a write pulse, and stores the program code included in the VPS code of a video signal in a code memory 14. By setting the VPS picture recording mode, a code latch circuit 13 repeats the action of latching the VPS code included in the video signal. A VPS control circuit 15 compares the latch code with a memory code, and controls the action of a VTR.

Description

DETAILED DESCRIPTION OF THE INVENTION B) Field of Industrial Application The present invention relates to an improvement of a recording mode switching circuit for a video tape recorder that enables VPS recording in normal recording mode.

(b) Conventional technology In West Germany, VPS (Video Program System)
A program reservation system called ``Program Reservation System'' is becoming commonly used in video tape recorders. Regarding this vPS system, please refer to West German Patent Publication No. 3828001 and West German Patent Publication No. 32436.
Publication No. 10 contains the complete disclosure. This vPS system is
To reliably record a desired program while at home, regardless of a shift in the broadcasting time of the program or interruption of broadcasting.

Fig. 2 shows a circuit block diagram of the vPS answering machine reservation system conventionally used in VTRs. First, when making a reservation, by operating the reservation setting button group (9), a reservation code is set in the reservation setting circuit (20). do. This reservation code can be set in the following order: recording start time (-+- code), reservation channel (code), VPS reservation availability (code), and recording end time (code). After the setting operation is completed, the reservation code is transferred and stored in the reservation memory. After that, when the program shifts to the reservation execution mode, the reservation codes in the reservation memory can be read out one after another.

The execution mode setting circuit (22) controls the timer control circuit (24) or the 3H pre-detection circuit (
26) and the VPS control circuit (15) are selectively driven. In other words, when VPS reservation settings are made, VPS
PS reservation mode is entered and the 3H previous detection times g(26) and V
The P S IIJ control circuit (15) is activated, and the V P S
When the reservation setting is canceled, the normal reservation mode is entered and the timer control circuit (14) is activated. However, although not shown, the execution mode setting circuit (222) detects that the selected channel does not contain many vPS-1 codes and
When PS reservation settings have been made, the normal reservation mode may be set.

First, in VPS reservation mode, the recording start time (code) and clock circuit (25
) to the 3H pre-comparison circuit (26), and 3 hours before the recording start time, the channel selection command output is input to the channel selection control circuit (26).
3), and the puff-on command output is also input to the sysphun circuit (19). Therefore, the tuning control circuit〈23
) immediately supplies the corresponding reserved channel code to the channel selection circuit (4) upon inputting the detection output, and at the same time, the system control circuit (19) turns on the VTR. The tuning circuit (4) supplies a tuning voltage corresponding to the reserved channel to the tuner (2>), selects the reserved channel from the output of the antenna (1), and derives a video signal.

Therefore, the vPS decoder (6) continues to dehood the VPS hood multiplexed on the video signal from three hours ago. This VP
The S code consists of an i1 set code corresponding to the original program start time and various control codes. The VPS code is latched by the food latch circuit (13) and compared with the recording start code in the reservation code by the VPS control circuit (15).

The VPS control circuit (15) inputs a recording command output to the mode setting circuit (18) when both ports -l' match. As a result, the system controller circuit (19) activates the recording means (5) to start recording.

Further, the VPS control circuit <15) supplies a stop command output to the mode setting circuit (18) when a special program interruption hood is input in the VPS code. As a result, when the 0 program interruption that stops the recording means (5) is released, the system code (19) generates a program code in the vPS code again, and the vPS control circuit (15)
again issues the record l1IJi command output. As a result, recording is restarted.

When the program ends, the program hood in the VPS code is changed and the VPS control circuit (15) supplies a recording end command output to the sysfun circuit (19). As a result, a power-off output is generated from the sysphun circuit (19), and VT
Power off R. However, even in this power-off state, the microphone portion (8) surrounded by a broken line remains in operation.

Next, the normal reservation mode will be explained. First, in the normal reservation mode, the timer control circuit (24) compares the recording start time code and the actual time, and when they match, inputs the recording command output to the mode setting circuit (18) and simultaneously selects the channel selection command output. It is input to the station command circuit (23), and a power-on command output is also input to the sysphun circuit (19).

Therefore, the video signal of the reserved channel can be recorded from the recording start time. Thereafter, the timer control circuit compares the recording end time code and the actual time, and when the times match, outputs a recording end command output. As a result, the VTR enters a puff-off state.

The above-mentioned operation is a recording reservation operation for executing recording while the user is away, but VTRs also naturally allow manual recording. That is, by manually turning on the power of the VTR and operating the channel selection button group (3), the desired broadcast signal can be transmitted and the video signal can be supplied to the recording means. Therefore,
Operate the mode setting button group (S) to set the mode setting circuit (18).
), the recording means records the video signal of the selected channel.

<C) Problems to be solved by the invention However, in the case of the conventional example described above, the VPS system cannot be used in the normal recording mode set by operating the record button, and the user cannot It was not possible to record the program reliably unless the program was continuously monitored.

(d) Means for deciding the problem Therefore, in order to make the VPS system function even in the normal recording mode, the present invention provides
VPS memorizes the program code in the food and inputs it later
It is characterized by comparing the program code in the food and controlling the recording state based on the comparison result.

(e) According to the present invention, by performing the VPS setting operation 1 without setting a reservation code, the normal recording mode is changed to VPS.
The setting will be changed to a VPS recording mode similar to the PS reservation mode.

(f) Example Hereinafter, the present invention will be explained according to an example shown in FIG.

FIG. 1 mainly specifically shows the components added to the second section, and it is assumed that the components of the main part (8) surrounded by a broken line are constructed by software as in the conventional circuit.

First, in this embodiment, when the VTR is set to the power-on state, the tuning button group (3) is operated and the tuning circuit (4) supplies the tuning tFE to the tuner (2). Therefore, the tuner (2) operates the record button in the 0-order mode setting button group that derives the video signal corresponding to the selected channel, and closes the corresponding record switch (S3).The record command output generated by this closure is set and stored in the mode setting circuit (18) via the lock gate (17).As a result, the system circuit (19) inputs the recording setting output to the recording means (5) to realize the normal recording mode. is a conventionally well-known configuration, and the structural features of this embodiment are as follows.

In this embodiment, the video signal to be recorded is input to the vPS decoder, and the dehooded VPS code is
It can be input to the hood detection circuit (11). Therefore, when a channel in which a VPS code is not multiplexed on the video signal is selected, no VPS code detection output is generated from the VPS code detection circuit <11).

In this embodiment, a normally open VPS setting switch (SWI
) is closed, the closed circuit output becomes vPS mode setting circuit <1
0). The PS mode setting circuit (10) is used when the VPS code detection output and recording setting output are occurring, that is, when the VTR is in the recording state and the vPS code is multiplexed on the video signal. , identifies that the VPS recording mode can be set and outputs the vPS recording setting output.
The control circuit (16) issues a lock control output, locks the lock gate, and prevents each command output from passing thereafter, making manual mode setting impossible. Also, V.P.
Write pulse generation circuit (12) that inputs the S recording setting output
generates a write pulse that causes the program food included in the VPS food in the video signal to be stored in the code memory (14). Therefore, the code memory stores the program code at the time of the VPS setting operation.

Further, the VPS recording setting output is input to the display means (7) to display that the vPS recording mode has been set.

Therefore, depending on the setting of the VPS recording mode, the food lunch circuit (13) thereafter repeats the operation of latching the vPS code in the video signal. The VPS control circuit (15) compares this latch code with the memory code and controls the operation of the VTR. First, when the program interruption code is input into the VPS code and latched, ¥ P S #J control circuit <15
>, the stop command output is input to the mode setting circuit (18), and the recording means (5) enters the stopped state. This program interruption state must be canceled by the occurrence of the original program code in the VPS code. Therefore, when the original program code is re-lamed, the VPS control circuit (15)
A recording command output is issued to drive the recording means (5) again to restart recording. Also, the end of 0-picture must be done by changing the program code. Therefore, when a different program code is latched, the vPS system O11 circuit (15) inputs a recording end command output to the system controller circuit (19>) and generates a power-off output.

The above-mentioned VPS recording mode can be canceled by closing the VPS fQ constant switch (SWI) again, and the normal recording mode is set.

In addition, in the vPS recording mode described above, the lock gate (
17> is in a locked state, making it difficult to manually set the mode. However, even if you are in VPS recording mode, you may want to cut commercials during broadcasting.
Therefore, in this embodiment, a lock changeover switch (SW2) is provided to control the operation lock control circuit (16). That is, when the normally open lock changeover switch (SW2) is closed, the lock control output of the operation lock $II control circuit (16) is deenergized, and the lock gate (17) is unlocked. Therefore, after unlocking, manual mode setting becomes possible.

In addition, this unlocked state can be changed using the lock changeover switch (SW2).
) can be changed to the original closed state, and the locked state and unlocked state are reversed each time the lock changeover switch (S'J2) is pressed. Further, the locked state and the unlocked state can be distinguished and displayed on the display means (7).

In this embodiment, the operation lock control circuit (16) is configured to issue a lock control output in the initial state immediately after the VPS recording setting output is generated, but in other embodiments, It is conceivable to configure the lock control output to be deenergized. It is clear that with this configuration, manual mode setting becomes possible unless the lock changeover switch 7/1 (SW2) is closed 2δ. Furthermore, if there is no need to lock the manual mode setting at all during the VPSQ image mode setting, as another embodiment, the lock switching switch (SW2) operation lock control circuit (16), lock gate (17) ) may be omitted.

Furthermore, by limiting the command output for unlocking to only the pause command output, or only the pause command output and stop output, unnecessary command outputs other than commercial cuts can be always locked.

(G) Effects of the Invention According to the present invention, recording using a VPS system becomes possible, and there is no need to continue monitoring the program during the recording period, and the effects are excellent.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram showing one embodiment of the present invention, and FIG.
The figures each reveal a conventional circuit diagram. (3)・VPS decoder, (15)・VPS control circuit, (SWI)...VPS setting switch, (SW2
)...Lock changeover switch, (10)...VPS mode setting circuit.

Claims (1)

[Claims] (1) With the video signal selected by the recording operation being recorded, the program code in the VPS code multiplexed into the video signal by the VPS setting operation is stored, and the stored program code and the VPS that will be input thereafter are stored. A recording mode switching circuit characterized in that the program code in the code is compared and the recording state is controlled based on the comparison result.