JPS5828665B2 - Eizojiyouhousaiseisouchi - Google Patents

Description

Detailed Description of the Invention The present invention relates to a video signal (which may include an audio signal) recorded over an arbitrary length section in the longitudinal direction of a magnetic tape.
The present invention relates to a video information reproducing apparatus for reproducing a magnetic tape on which one or more programs each consisting of a series of blocks are recorded, with each block as one unit.

The present invention automatically selects a block designated by a command or control command from a human-powered device, and repeatedly plays this block on a VTR (video tape recorder) until the next command is received. or by programming control instructions so that specified blocks are played back in a predetermined order, so that the same magnetic tape can be played back in response to a target or in response to a response from a viewer's input device. Can be played in various orders and therefore VT
A suitable video information reproducing device is provided by applying R to training, learning, etc.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the overall configuration, and in the figure, 1 is a monitor receiver, and 2 is a helical scan type rotary two-head VTR. be.

The reproduction output (video signal and audio signal) of the VTR 2 is supplied to the monitor receiver 1 and reproduced there.

In this case, the television signal received by the monitor receiver 1 may be recorded by the VTR 2.

Further, numeral 3 indicates a control device, and the VTR can be automatically operated in response to electrical signals from the control device 3.

Reference numeral 2a is a driving accessory for this purpose.

Reference numeral 4 indicates a control command storage device consisting of a program card and its reading sensor, and 5 indicates an input device such as a keyboard.

As shown in FIG. 2, the magnetic tape 11 to be reproduced by the VTR 2 includes a block A1 of a video signal recorded over an arbitrary length section in the longitudinal direction, and a similar block A1.
2. A program consisting of A3...An is recorded.

This program is not limited to one, but a common magnetic tape 1
In some cases, a plurality of programs may be recorded in one.

Three types of cue signals are then recorded as markers on the audio signal track or cue signal dedicated track of the magnetic tape 11.

The cue signal P is for associating the first position of a program consisting of a series of blocks, that is, block A1, with the first address of a control command, which will be described later.

Cue signal S indicates the beginning of each of blocks A1 to An, and cue signal E indicates the end of each of blocks A1 to An.

The cue signals P, S and E are distinguished by the number of pulses reproduced.

That is, the cue signal is recorded as a pulse signal, and therefore, when the cue signal is reproduced, a reproduced output having the differential waveform shown in FIG. 3A is obtained.

This reproduced output is passed through the waveform shaping circuit 12 and converted into a pulse signal shown in FIG. 3B.

This pulse signal is counted by a counter 13.

As an example, the cue signal P has 24 pulses, the cue signal S has 8 pulses, and the cue signal E has 2 pulses.

Then, the count value of the counter 13 is supplied to the decoder 14, whereby the cue signal P is generated.

E and S are obtained.

15 is a counter for counting the cue signals S.

FIG. 4 shows the structure of the control commands stored in the control command storage device 4, where one word consists of 8 bits X, to X8.

First and second bits X1. X2 has information on the type of instruction.

In other words, it is determined as shown in the table below.

Further, the third bit X3 to the seventh bit X7 represent the distance traveled to the next predetermined address, and are from (OOol) to (11
11), numbers (1 to 31) are specified.

Further, the eighth bit X8 specifies the direction of movement; when it is "0", it is forward, and when it is "1", it is backward.

One word of the control command corresponds to each block of the video signal recorded on the magnetic tape 11 on a one-to-one basis.

In this example, as shown in FIG.
Correspondence is performed by matching the order of A7.

In this example, the control command storage device 4 is configured as a card reader, and the control commands are written on a punch card 16 as shown in FIG.

In Figure 6, the shaded area is the punched area.
This corresponds to "1" of the control command in FIG.

This punch card 16 is read by a reading sensor consisting of a light source (for example, a lamp) and a light receiving element (for example, a phototransistor). ) to perform a reading operation.

At this time, a pulse is generated when moving one step, that is, moving one address in the Z direction.

The reading operation of the control command storage device 4 and the operation of the VTR 2 are automatically driven (operated) by the control device 3.

FIG. 7 shows the configuration of the control device 3, and 17 indicates the cue signal identification and cue signal S shown in FIG.
The count value of the cue signal and the cue signal S from this counter is supplied to the decoder 18.

This decoder 18 receives control commands read from the control command storage device 4, commands generated by key operations on the input device 5, and commands for one step movement of the reading sensor in the Z direction during punch card reading operation. A pulse generated at a rate of 1 is given.

As a result, a command is generated from the decoder 18 to the read sensor drive control device 19 and the VTR drive signal generation circuit 20.

This reading sensor drive control device 19 drives the reading sensor to move by a short amount in the Z direction and to scan the program card 16 in the Y direction, and also controls which direction to move forward or backward in the Z direction. It is to be specified.

Further, the VTR drive signal generation circuit 20 generates an operation command for the VTR 2, which is given to the drive accessory 2a.

As a result, the VTR 2 automatically performs operations such as forward steady forwarding, stopping, rewinding, and forward fast forwarding in response to operation commands.

The input device 5 also includes three types of operation keys, namely a start key 2131, a skip key 21b, and a repeat key 2.
1c is provided.

The start key 21a is pressed at the beginning or in the middle of a program to execute the program from the beginning.

When the start key 21a is pressed, the VTR 2 automatically enters a rewind state by the control device 3, and automatically enters a replay state when the cue signal P is reproduced.

The reading sensor of the control command storage device 4 is also controlled by the control device 3 to read out the control command at the first address.

The skip key 21b is a key for jumping to the next block based on a control command.

The repeat key 21c is pressed in the middle of a block to reproduce that block from the beginning.

An embodiment of the present invention described above will be explained by taking as an example a case where blocks A1 to A7 are recorded on the magnetic tape 11 as shown in FIG. 5, and control commands are programmed.

FIG. 8 is a flowchart in this case.

First, when the start key 21a is pressed, the control device 3 sends a rewind command to the VTR 2, the cue signal reproduced from the magnetic tape 11 is identified, and when the cue signal P is sensed, the control device 3 sends a rewind command to the VTR 2. Stop→Play] command to VT
R2, VTR2 enters the playback state, and block A1
is regenerated.

On the other hand, the reading sensor of the control command storage device 4 is set to address 1, and the control command at address 1 is called up to the control device 3.

In this example, the control command at address 1 (X1X2X3X4X5X
6X7X8) is (10001000), so block A1 is processed with cue signal E until skip key 21b is pressed
is repeatedly regenerated (recycled).

When the skip key 21b is pressed, the process jumps to block A5, which is four blocks ahead (forward).

This jump is performed by counting the number of cue signals S by four counters 15 for block failures, and by counting the number of cue signals S by four counters 15, and by counting the pulses generated at a rate of one every time the reading sensor advances by one address for the control command storage device 4. Address 5 is designated by counting.

At the time of this jump, the VTR 2 is fast-forwarded (on the contrary, if it is backward, it is rewound), and the cue signal is reproduced at a frequency approximately 100 times that of recording (4 KHz).

Then, when block A5 is designated, the VTR 2 enters a playback state, and while block A5 is played back, the command at address 5 (10110001) is called to the control device 3.

This control command at address 5 is sent to block A by cue signal E.
is repeatedly reproduced, and when the skip key 21b is pressed, the content is to jump three blocks backward, that is, to reproduce block A2.

Hereinafter, blocks A1 to A7 are reproduced in a predetermined order in the same way as described above, by a control command, by a command corresponding to a key operation on the input device 5, or by repeating reproduction as necessary. Blocks A1-A
7. The image will be displayed on the monitor receiver 1.

In this example, block A-4 is programmed not to be reproduced, so any control command may be written at address 4.

It should be noted that if the repeat key 21c is pressed while any block is being reproduced, regardless of the control command, the block will be reproduced from the beginning.

According to the present invention described above, blocks A1 to An of video signals recorded on the magnetic tape 11 are automatically reproduced in a predetermined order according to a preset program and displayed on the monitor receiver 1. be able to.

Therefore, the same magnetic tape can be played back in various orders depending on the object or the response from the viewer's input device, and the VTR 2 can be used for training, learning, etc.

Furthermore, since it is sufficient to record cue signals in addition to video signal blocks on the magnetic tape 11, the video signal source is easy to create and can be created using an ordinary television receiver and VTR.

Note that the control commands corresponding to each block may be recorded in the cue signal track of the magnetic tape 11, and the control commands may be associated with the blocks, and the control command storage device 4 may be omitted.

[Brief explanation of drawings]

Fig. 1 is a system diagram of an embodiment of the present invention, Fig. 2 is a system diagram of a magnetic tape recording pattern and cue signal identification circuit, Fig. 3 is a waveform diagram used for explanation, and Fig. 4 is a control command diagram. Figure 5 is a diagram showing the correspondence between a series of control commands and blocks, Figure 6 is a plan view of an example of a program card, Figure 7 is a system diagram of the control device, and Figure 8 is a diagram showing the configuration. 3 is a flowchart used to explain one embodiment of the present invention. 1 is a monitor receiver, 2 is a VTR, 3 is a control device, 4 is a control command storage device, 5 is an input device, 11 is a magnetic tape,
16 is a punch card, and A1 to An are blocks.

Claims (1)

[Claims] 1 Record a block of video signals on a recording medium, and
A video signal reproducing device that records three types of markers provided only at the beginning and end of each of the blocks and a specific block among the blocks, and reproduces the video signal and a recording medium on which the markers are recorded; A control command storage device that stores a control command set corresponding to each of the video signal blocks and a keyboard input device are provided, and a marker position corresponding only to the above-mentioned specific block is searched for and reproduced by a start signal from the keyboard input device. The operation is started, and the control state of the recording medium is controlled during playback of each video block or when the end marker is detected by the above control command set and commands from the above keyboard input device, and the next playback is started. A video information reproducing device in which a video block to be played is called.