JPS61187142A - Remote controlling device of double cassette vtr - Google Patents

Abstract

PURPOSE:To reduce cost and to improve operability by selection one VTR by changing a monitor selector switch in the first decoding circuit and at the same time, inverting operation of two gate function circuits, and making functional control such as reproducing, rewinding etc. of selected VTR by the output of the second decoding circuit. CONSTITUTION:Encoding signals passed through a phototransistor Tr1 and an amplifier 3 are decoded through the first and second decoders 31, 32 and a channel decoder 27. The decoder 31 decodes a monitor selecting signal and controls a selector switch 8 through an FF circuit 7, and selects output of the first and second VTR21, 22 and outputs as a monitor signal. When a VTR11 is selected, Q output of the circuit 7 goes to high and opens the gate of the first gate circuit. When a rewinding signal is decoded by the circuit 32, the signal changes the VTR21 to rewinding mode through the circuit 11. When the circuit 7 is inverted by depressing a selector key, the switch 8 is changed by an inversion Q output and selects VTR22, and opens the second gate function circuit 12 to control VTR22.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a remote control device for a double cassette vTFl (video tape recorder) having at least common operating functions such as playback and rewinding.

(1) Conventional technology (For example, a double power set (VTR) for playing video signals of Beta and VH8 systems at any time, dubbing each other, or recording television signals on a cassette of a desired system) is proposed.

This double power set) VTR is basically a VTR of each type.
The deck is housed in a common case, and other commonly used televisions, tuners, and arbitrarily selected V
It is equipped with a monitor switch that supplies the playback output of the TR to a monitor television.

The simplest remote control device for such a double cassette VTR is one in which each device is equipped with a dedicated remote control device (combination of transmitter and receiver), and two transmitters are housed in one case. . The key arrangement of the transmitter of this device is 1
For example, as shown in FIG. 6, two sets of function control keys (keys for rewind, play, fast forward, stop, record, etc.) are essential for operating the VTRs 1 and 2'Ik, respectively.

In addition, in order to prevent malfunctions of mutual remote control devices, the encoded signals sent by each key operation must be different even if they are the same function control signal (for example, a signal for controlling 1 rewind). Therefore, twice the circuit and key space is essential.

Not only are costs high, but there are also disadvantages such as poor operability.

Taking this into consideration, one example of an attempt was made to reduce the key space by reducing the two sets of function control keys to one set and using it in common for two VTR operations. -144724. etc. have been proposed.

This proposal is based on two controlled VTs, as shown in Figure 7.
Operation keys for the transmitter of R's remote control device.

(rewind, play, fast forward, stop, record, etc.) are common.

A switch for selecting VTR 1 and 2 (it changes the encoder conditions in conjunction with switching sl, so that even if the same key is pressed, the remote control signal is encoded with a different code and transmitted. .

Although this method reduces the key space, the number of encoder circuits and the number of decoder circuits does not change, and the cost remains high.

(c) Problems to be Solved by the Invention The present invention has been made in view of the drawbacks of the conventional examples mentioned above.
In addition to reducing the key space of the transmitter and reducing the number of encoder and decoder circuits in the transmitter and receiver to reduce costs, the system is configured so that only the VTR with monitor output selected is linked and remotely controlled. , which aims to significantly improve operability.

2) Means for solving the problem The remote control transmitter side includes at least a monitor selection signal for sequentially switching the monitor switches, and a set of functional systems #JO! for controlling the operating functions of the two VTR decks.
An encoder circuit is provided for encoding No. i and transmitting it as a remote control signal, and the VTR includes a first decoding circuit for decoding a monitor selection signal from the remote control signal and a second decoding circuit for decoding a single function control signal; A circuit that receives the output of the first decoding circuit as an input or determines the presence or absence of the output and generates at least a two-state signal.

The first and second circuits are selectively controlled by the output of the circuit.
A gate function circuit is provided, and the output of the first decoding circuit causes the first decoding circuit to operate in conjunction with switching of the monitor switch.
The operation of the second gate function circuit is reversed, and the VTR whose video output is selected by the monitor switcher is configured to control functions such as rewinding by one playback by the output of the second decoding circuit.

(e) Operation The monitor selection signal decoded by the first decoding circuit switches the monitor selection switch to select one of the video and audio outputs of V'rB. At the same time, the first . The second gate circuit is inverted to remotely control the functions of the VTR in which video and audio outputs are selected by the output of the second decoding circuit.

(f) Example Details of the present invention are shown in Fig. 1 showing a functional block diagram, Fig. 2 showing a key arrangement of the transmitter, and Fig. 3 showing a main part functional circuit diagram.
This will be explained with reference to FIG. 4, which shows the main parts of the flowchart.

In Fig. 1, (1) is a phototransistor that photoelectrically converts the received infrared light, (2) is the output of the amplification circuit (3) that has been electrically converted (the IR multiplied signal is manually decoded to produce a tuning signal, Decoder that converts monitor selection signal and each function control signal, (4) is TV tuner, (5) is channel selection, VI
A television receiving circuit including P, SIF, video detection and audio detection circuits (111 receives the function control signal output from the decoder (2));

a first gate function circuit that controls the first VTR 1211't''; (13 is a second gate function circuit that receives the function control signal supplied from the decoder (2) and controls the second VTR 221; (6) is a second gate function circuit that controls the second VTR 221; ) Common power supply circuit for VTRs other than the remote control receiver controlled by the output of (7)
) is a two-state signal generation circuit that enables a flip-flop circuit triggered by a monitor selection signal that is one of the outputs of the decoder (2); (8) Fi the circuit (
Monitor selection switch that can be switched by the output of (7), (9)
Similarly, indicates a controlled display circuit. Said first,
The second VTR + 211 is a mechanism system or c! 41 and circuit threads are divided into blocks.

The decoder is a 1M-capacity known circuit constructed using a microcomputer, and is a channel decoder that decodes and outputs a channel selection signal indicating the direction (up or down) of the channel set.

A power decoder (2) that decodes and outputs a signal for controlling on/off of the VTR common power source (6), a first decoder (2) that decodes a monitor selection signal that controls the monitor selection switch (8), and recording, playback, and fast forwarding. A second decoder (to) is provided for decoding function control signals such as one rewind and stop.

The above flip-flop (2-state signal generation) circuit (7
) and 1st. The relationship between the second gate function circuit (ill(12) is expressed as shown in FIG. 3 in the form of a discrete circuit.

1st. Second gate function circuit (111 (12 is the fifth gate circuit GH to G1 corresponding to the number of each function control signal marked #)
5 or GH~()! 011. The reproduction control signal is input to the ()H gate circuit, ()1! , G! ! The gate circuit has a fast-forward control signal * G'ss G'' The gate circuit has a rewind control signal, ()14.Q44 The gate circuit has a stop control signal, ()t5.()2! The gate circuit has a stop control signal. The recording control signal is sent to the second decoder circuit.■
is applied as an input from On the other hand, the Q output of the flip-flop circuit (7) constituting the 2-state circuit is connected to the gate terminal of each gate circuit of Gll to G5.
The 100 output of the flip-flop circuit (7) is applied to the gate terminal of each of the 25 gate circuits. In the M2 gate function circuit α plate 2, the monitor selection signal is set to the flip 70.
Each time the tube circuit (7) is triggered, the operation is alternately reversed, and the output of the second decoder circuit (2) is alternately applied to the first VTR or the second VTFI as a control input.

The remote control transmitter has a well-known configuration called an infrared remote control, and is equipped with a circuit and a key for newly encoding and transmitting a monitor selection signal.

Figure 2 shows the arrangement of the keys of the transmitter used in the fef of the present invention. i- is shown. As shown in the figure, only one set of common P & No Yagi for rewind + aL playback (BL, fast forward (C1), stop (DL), record (EL) is provided for this transmission, and a separate independent key is used for up (U) for the TV channel. ) S down (DI keys and power (nl key) are provided, but for this part, the configuration of a normal stand-alone VTR transmitter can be followed as is.

Therefore, as far as the transmitter is concerned, it is only necessary to add the monitor selection key h1 and a circuit for encoding the monitor selection signal.

Next, the operation of the device of the present invention will be explained together with the detailed configuration. For m transmitters, keys are pressed in the order of power (nl, monitor selection), and function control, for example, playback (b).

A series of enriched signals (IR) amplified to an appropriate level after being photoelectrically converted by the phototransistor (1) and the amplification circuit (3) are supplied to the power supply (2), the first (2), and the channel input to each decoder.

decoded. It is well known that this type of decoder, including the second decoder (to), is implemented by a microcomputer, such as VTO-M3 manufactured and sold by Honshujin Co., Ltd.

You can practice that technique. The power supply decoder ■ controls the above-mentioned common power supply circuit (6) with its output.

V'l' Rf: Power supply state.

Next, the first decoder (2) decodes the monitor selection signal.

A single pulse triggers the flip-flop circuit (71) to change its state. The flip-flop circuit (7) is functionally incorporated into the microcontroller as a two-state signal generation circuit, but its output is used to select the monitor selection switch (8).
), each time the first monitor selection signal arrives. Second
Selects the video/audio output of the VTR and outputs it as a monitor signal. Assuming that the output of the first VTR is now selected, the Q output of the flip-flop circuit (7) becomes high, thus forming the first gate function circuit 0 ().
Each gate of the gate circuits 11 to G15 is held open.

In this state, for example, the rewind (or review) control signal is decoded by the second decoding circuit (to).

This signal is passed through the ()13 gate circuit to the first VTRG1.
11 and its mechanism system c! 31 to rewind (or review) mode. In the review mode, etc., the constants of the circuit system @ are changed by the decoded signal. The Q output of the flip-flop circuit (7) simultaneously turns on the transistor (transistor), lights up the LED &l, and turns on the first VT.
Displays that R1211 is in a controlled state.

Next, when the monitor selection key - is pressed on the transmitter side, the first decoder C11l decodes the received encoded signal and triggers the flip-flop circuit (7) to invert it. Accordingly, the Q output becomes low and the Q output becomes high, so the monitor selection switch (8) controlled by the 0 output is switched to select the output of the second VTR (221) and supply it to the monitor TV. The gate fi function circuit α2 becomes an open gate state by the Q output, and thereafter passes the function control signal sent from the second decoding circuit (to) to the second VTR (to).
23.

At the same time, transistor (6) is turned on by the Q output.

The transistor becomes non-conductive due to the Q output and becomes LE.
D14 lights up to indicate that the second vTR (u) is in the controlled state.The circuit shown in FIG. 3 above can also be processed by a microcomputer in the same way as the decoder (2).

FIG. 44 shows a simple flowchart for processing the circuit functions of FIG. 3 by a microcomputer.

This flowchart will be explained below. When the power supply (6) is turned on (100) by the output of the power supply data (■), an initial routine operation (110) is performed, and a 1 high signal is automatically sent to the monitor regardless of the presence or absence of the monitor selection signal. Selection switch (8) K is applied and the monitor signal source is switched to the 1st VT'R side.
B) is simultaneously added to the base of the transistor (transistor) mentioned above, and the main routine (12
(11) to operate the remote control signal (IR
Waits to receive a damage signal.

In the missing step (130), the presence or absence of an IR (infrared remote control) signal is periodically detected, and if it is not detected, the process jumps to the state where there is no IR flaw signal. Step (1
30), when the presence of the IR scratch signal is confirmed (2).

The process moves to a decoding routine (140), in which the IR flaw signal (encoded signal) is decoded into various function control signals. The processing of each decoding routine.

Following the functional block diagram in Figure 1, the first. Second decoder C
The block is displayed as 1m1■. When the output of the decoding routine (140) outputs a monitor selection signal at a predetermined timing, it is determined whether or not there is a monitor selection signal (150). When it is determined that the monitor selection signal "presence" bacteria, the flag output is latched and transmitted as a control output to the monitor selection switch (8) and the controlled display circuit (9), and the monitor selection switch (8) and switching the display circuit (9) (1
90).

The monitor selection signal is “absent” in the discrimination program (150).
When it is determined that it is a circle, the next monitor display determination program (16
0) and determines the input of the controlled display circuit (9).

When the @ input of the display circuit (9) is 1 bit.

For example, if a configuration is adopted in which a transistor is driven by a transistor in 11〃 and a transistor in 60' is used, the presence or absence of the output from the 1 display output port is detected and determined, and the Q and Q outputs of the flip-flop circuit (7) in the TFC diagram 1 are When adopting a configuration in which 2 bits are used in parallel to drive each transistor 1),
It is determined whether there is an output equivalent to Q and if the controlled display is the first VTR, the output equivalent to the second decoder is set to the 1st v↑R1ll1.
- output to the output boat 170), the controlled display is the second
If V'I'R, the output equivalent to the second decoder is sent to the second VT.
Output to the output boat for R control. (180).

The decoder circuit, gate gloss circuit, and two-state output circuit are all replaced by microcomputer program processing, but the output of the second decoder circuit (toward) is adjusted and divided into four output ports. When performing program processing using the output of the first decoder circuit c3Il, the control state of the VTFI that is not the controlled object must be maintained at the state before switching, or it must be unconditionally stopped (the tape is Possible methods include setting the capstan to a mode in which the rolling contact between the capstan and the pinch roller is released.

Further, the flip-flop circuit (7) is replaced with a functional circuit equivalent to a 3-state or ring counter.

1st. VTR (2n-2nd VTR (221-'rvchi,
- It is also possible to configure the remote side @ similar to the above to be performed only when the reproduction signal of the 1.42nd VTFL is selected by switching the monitor signal in three stages (4) and (5). I can do it. Furthermore, as shown in FIG.
The output of JII is input to the 6-bit quaternary counter, and the output is processed by the decoding circuit to obtain an output that is sequentially shifted from 1 to ni, which sequentially activates the gate circuit function circuit of n@. It is also possible to configure the system so that the VTRs are sequentially switched and controlled.

(Effect 1) According to the present invention as described above, what are the encoders and decoders on the transmitter side and receiver side for remote control?

Since the same components as a conventional single VTR can be used except for the selection signal, circuits, keys, etc. can be saved and costs can be reduced.

This can contribute to securing space. Also, since there is more room in the encoder and decoder, double cassette V
Remote control g14a with TR-specific operation functions (dubbing, etc.)!
ability can be added.

[Brief explanation of drawings]

1 to 5 relate to the device of the present invention, in which FIG. 1 is a functional diagram and FIG. 2 is a key arrangement diagram of a transmitter. FIG. 5 is a circuit diagram of the main part, FIG. 4 is a flowchart showing the processing procedure of the main function, and FIG. 5 is a circuit diagram of the main part of another embodiment. Figures 6 and 7 respectively show different key arrangement diagrams of conventional transmitters. (8) Monitor selection switch (tDJ1
Gate function circuit (1, 3 2nd gate function circuit developer Sanyo “Kameki Co., Ltd. Daisanto Patent attorney Shizuo Sano Figure 4 Figure 6

Claims (1)

[Claims] (1) A first device with common operating functions such as playback and rewinding;
In a remote control device for a double cassette VTR that includes a second VTR and a monitor switch that switches the playback video output of either VTR and supplies it to a monitor receiver, the remote control transmitter side includes at least one of the monitor switches in sequence. An encoder circuit is provided for encoding a monitor selection signal for switching and a set of function control signals for controlling the common operation functions, and transmitting the encoded signals as a remote control signal, and the VTR receives the monitor selection signal from the received remote control signal. A first decoding circuit decodes the function control signal, a second decoding circuit decoding the function control signal, a circuit generating a two-state signal depending on the presence or absence of the output of the first decoding circuit, and selection is made based on the output of the circuit. selectively controlled first and second gate function circuits are provided, and the operation of the first and second gate function circuits is reversed in conjunction with switching of the monitor switch by the output of the first decode circuit; A remote control device for a double cassette VTR configured to control functions such as playback and rewinding of the VTR selected by the monitor switch using the output of the second decoding circuit.