JPS63173483A - Still picture reproducing system - Google Patents

Abstract

PURPOSE:To write and display an optional character, symbol or the like on a desired still picture by recording previously a character display command signal and a picture switching signal in a second recording medium, and switching a reproduced picture when the picture switching signal from the second recording medium is regenerated. CONSTITUTION:When in a reproducing mode, the display command signal is read out from a third track of a magnetic tape M, it is converted into a parallel signal by a serial/parallel conversion circuit 41, and is inputted to a character generator 42. The synchronizing signal of a still picture signal is given to the character generator 42 from a synchronizing separator circuit 43. Accordingly, a video signal, which expresses the character, instructed by the display command signal, and besides, synchronizes with the synchronizing signal, is outputted, and is given to a synthesis circuit 44, and both signals are superimposed. Accordingly, the still picture, on which a writing, consisting of one character or of plural number of the characters, is superimposed, appears in the prescribed position of the picture frame of a CRT 40.

Description

DETAILED DESCRIPTION OF THE INVENTION Summary of the Invention A character display command signal and a screen switching signal are recorded on a second recording medium separate from a recording medium for still video signals. When the screen switching signal is reproduced from this second recording medium, the reproduced screen is switched. When a character display command signal is reproduced, a character corresponding to the command is displayed superimposed on the screen being reproduced. With this, arbitrary characters, symbols, etc. can be written and displayed on a desired still image.

BACKGROUND OF THE INVENTION The present invention relates to a magnetic disk having a plurality of recording tracks, on which still image video signals are recorded, and a magnetic head moving in the radial direction of the magnetic disk to reproduce signals from any track. The present invention relates to a still image reproducing system using an image reproducing device.

Still image reproducing devices are becoming widely used not only for consumer use but also for business use. One of the ways to utilize this device is to display the images reproduced from this device on a CRT display device, play the music played from a tape recorder as background music, and if necessary, provide verbal information such as narration. will be inserted and played, and the screen on the CRT display will change in relation to this music, etc., and guidance,
There are things that effectively accomplish the transmission of information, etc. However, this type of information is easily given by voice and is therefore prone to errors. Furthermore, it may not be desirable to output only the musical melody as sound, but to output linguistic information as sound. If linguistic information is to be conveyed in this case as well, it is preferable to display it on the screen.

On the other hand, in order to automatically switch the static screen on the CRT display in conjunction with the above-mentioned music and language information, a cue signal equivalent to pressing a feed key is recorded on the tape of the tape recorder. The applicant has already devised such a system (for example, Japanese Patent Application Nos. Sho B1-110589 and Sho No. 61-110570).

In this system, the above-mentioned music, language, etc. are recorded on one or two tracks of a tape played back by a tape recorder, and cue signals are recorded at appropriate locations on other tracks. As the cassette tape is played back, a cue signal is read out and given to the still image playback device.
If this cue signal means a forward feed command, the magnetic head in the still image reproducing apparatus is sent to the next track.

SUMMARY OF THE INVENTION This invention records a signal representing a command to display linguistic information together with a signal for switching one screen on a recording medium such as the tape of the tape recorder described above, and displays a signal for switching between still screens and displaying information on the still screen. It is an object of the present invention to provide a still image reproduction system that can automatically display linguistic information on a computer.

The still image reproducing system according to the present invention includes still image reproducing means for reproducing and outputting a still video signal recorded on a first recording medium, and a character display command signal and a screen switching signal recorded on a second recording medium. an image control means for reproducing and outputting; a double-sided switching control means for controlling switching of the still video signal to be reproduced from the first recording medium in response to the output screen switching signal; and a double-sided switching control means for controlling the switching of the still video signal to be reproduced from the first recording medium; The present invention is characterized by comprising means for generating a video signal representing the character, and means for synthesizing the still video signal output from the still image reproduction means and the video signal representing the character.

A typical example of the second recording medium is a magnetic tape, but the present invention is not limited to this, and other media such as a perforated tape, a record, an optical disk, and other mediums in which recorded data can be reproduced up to a substantially constant speed can be used. When a magnetic tape is used, the character display command signal and the screen switching signal can be recorded on the same track or on different tracks. For such recording media.

The background music, narration, etc. described above may or may not be recorded.

Screen switching signals include forward feed signals and reverse feed signals.

There will be a return signal etc.

According to this invention, since the screen switching signal is recorded on the second recording medium, when the signal is reproduced, the screen is automatically switched. Further, since a character display command signal is recorded on this second recording medium, when it is reproduced, a video signal representing the commanded character is generated.

This video signal is superimposed on the still video signal.

It becomes possible to display linguistic information such as arbitrary characters and combinations thereof, such as sentences, superimposed on a still image at any time.

Since the screen switching signal and the character display command signal are displayed on the same recording medium, it is possible to switch one screen and display the characters while maintaining a constant temporal relationship. For example, it is possible to display a character when there is no switching between two screens, or to display a character when the screens are switched.

A video signal representing a predetermined still image is recorded in advance on the first recording medium. Although it is possible to record a character superimposed on this still image, there are cases where it is desired to use one still image for various purposes. Once a still image with superimposed characters is created, it can only be used for one purpose, but according to the present invention, a common still image can be created by simply changing the character display command on the second recording medium. It will be possible to display various characters overlapping each other.

This invention can be developed by further recording music, narration, etc. on the second recording medium that records the screen switching signal and the character display command signal, and by this, the character display is performed in synchronization with these background sounds. It becomes possible to display and switch screens. Although it may be possible to synchronize screen switching and character display through computer control, it would be extremely difficult to synchronize with the background sound described above. According to this invention, such applications can be easily developed. For example, it would be possible to easily play a melody, display lyrics that match the melody on the screen, and switch the screen at an appropriate time.

Needless to say, the present invention can also be applied to a still image reproducing device having a still image recording function.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 shows an overall still image reproducing system, which includes a still image reproducing device 1o and a control signal reproducing device 20. As shown in FIG.

In the still image reproducing device 10, a large number (for example, 50) of tracks (for example, a track pitch of 100 μm) are provided concentrically on the magnetic disk 12.
An FM-modulated color video signal (including a luminance signal, two color difference signals, etc.) for one image is magnetically recorded on each track. The 50 tracks provided concentrically on the magnetic recording surface of the magnetic disk 12 have Nα1 tracks arranged in order from the outermost track.
Tracks Nα from to Nα5o are attached. The home Φ position HP is outside the demon 1 track.

The overall operation of the still image reproduction device 10 is supervised by a control device 11. This control device 11 is a central processing unit, preferably a microprocessor (hereinafter referred to as CPU).
, a memory for storing its programs and necessary data, and interfaces with each peripheral element circuit, device, etc.

A magnetic head 13 for reading a still video signal recorded on a predetermined track of the magnetic disk 12,
It is arranged to be movable in the radial direction of the magnetic disk I2. Further, a phase detector 15 detects the magnetic flux of the chucking permanent magnet leaking from the magnetic body provided in the core of the magnetic disk 12 and generates one phase detection pulse PG for each rotation of the magnetic disk 12. Close to the core.

The phase detection pulse PG from the phase detector 15 is input to the servo control circuit 17 and the control device 11 . Servo control circuit 1
7, the disk motor 16 is rotated at a constant speed.

For example, it is rotated at a constant speed of 3.80 Or, p, m. Further, the servo control circuit 17 starts and stops the motor 1B in response to commands from the control device 11.

The modulated video signal read from the magnetic head 13 is as follows.

It is sent to the reproduction processing circuit 18. The reproduction processing circuit 18 is.

The manually modulated luminance signal and color difference signal are each demodulated and combined and outputted to the output terminal as a standard color video signal. When this video signal is given to a television receiver, the recorded still image is transmitted to a cathode ray tube (CRT) 4Q.
displayed above.

The magnetic head 13 is supported movably in the radial direction of the magnetic disk 12 by a transfer device 14, and is controlled to be transferred in the same direction. The control device 11 includes an operation panel (not shown)
In response to inputs from a forward switch, reverse switch, etc. provided in the magnetic head 13 and a detection signal from a cue signal detection circuit 19, instructions regarding the direction and amount of movement of the magnetic head 13 are given to the device 14. The device 14 has a step
It includes a motor, and the magnetic head 13 is moved in proportion to the rotation angle of this step motor. For example, per one driving pulse of a step motor, this motor rotates approximately 15 degrees, which causes the magnetic head 13 to rotate approximately 8.33 μm (
1 pitch) is transferred. Therefore, the magnetic head I3 is transported very accurately.

The control signal reproducing device 20 has a four-track simultaneous recording/reproducing function, and has four magnetic heads 21, 22, 23 .
It is equipped with 24. As shown in Figure 2.

The first and second tracks of the magnetic tape M are used for recording music and narration, the third track is used for recording character display command signals, and the fourth track is used for recording cue signals. It will be done. The magnetic tape may be, for example, a cassette◆tape.2 The control signal reproducing device 20 has the same tape drive mechanism as that provided in a normal tape record. The magnetic heads 21-24 record/reproduce signals on the first to fourth tracks of the magnetic tape, respectively.

The magnetic head 23 for the f43 track has an amplifier circuit 31
, playback via the recording/playback switch 37, and the demodulation circuit 3.
3. It is connected to the recording circuit 34. Similarly, the magnetic head 24 for the fourth track is connected to the reproducing circuit 35 through the amplifying circuit 32 and the changeover switch 38. It is connected to the recording circuit 36.

The character display command recorded on the third track of the magnetic tape M includes, for example, a code representing the position on the CRT screen where the first character is to be displayed, a code representing the size of the character, etc. Codes specifying characters are arranged in the order they should be displayed. Each of the above codes generally consists of 8 or 16 bits. For example, the above command is IK
It is FSK (frequency shift keying) modulated by a Hz carrier and recorded on the magnetic deso M.

In the playback mode where the selector switch 37 is on the playback side,
When the display command signal is read from the third track, it is demodulated by the circuit 33 and converted into a serial binary signal, which is output from the device 20. and,
The serial/parallel (S/P) conversion circuit 41 converts it into a parallel signal of, for example, 8 bits each, and converts it into a character/parallel signal.
input to the generator 42. On the other hand, the still video signal output from the reproduction processing circuit 18 is given to a synchronization separation circuit 43 and a synthesis circuit 44. A synchronization signal for the still video signal is supplied from the synchronization separation circuit 48 to the character generator 42. Therefore, the character generator 42 outputs a video signal representing the character specified by the 2 display command signal and synchronized with the synchronization signal, and is applied to the 1 synthesis circuit 44. In the synthesis circuit 44, the still video signal and the character video signal are superimposed and given to the CRT 40, so that a still image in which a text consisting of one character or a plurality of characters is TfXi appears at a predetermined position on the screen of the CRT 40.

There are various display formats for characters.

The simplest method is to display one character at a time.

It is also possible to arrange a plurality of characters in one or more rows to form a sentence and display them all at once. In this case, the display command should include an output command and an erase command. Then, the video signals of a plurality of characters generated by the character generator 42 are outputted by the output command, and one frame (or one frame) of the still video signal is output until the erase command is read out.
It is preferable to repeatedly output the data in synchronization with the cycle of the field. 2 more displayed characters to its CR
It is also possible to move it on the T screen. C
The appearance point of the character on the RT screen, the erasure point of time, the speed thereof, etc. can also be set arbitrarily. If necessary, S
A memory for storing the code of the 2-display command may be provided before or after the /P conversion circuit 41.

Cue signal (screen switching signal) recorded on the 4th track
There are two types in this embodiment. One of them is a signal that has a frequency of IKHz and lasts for 0.3 seconds, and this signal moves the magnetic head 13 in the still image reproducing device IO in the forward direction once.
Commands to send a track. The other is a signal that lasts for 2 seconds at the same frequency, and this signal moves the magnetic head 13 to N
This is a command to return to the cLl track. These cue signals reproduced by the reproduction circuit 35 when the changeover switch 38 is on the reproduction side are sent to the cue signal detection circuit 19 of the still image reproduction apparatus IO. The cue signal detection circuit 19 detects the input IKHz frequency signal, and the detected signal is manually input to the control device 11, and the control device 11 measures its duration to determine the command. Transfer control of the magnetic helad 13 is performed in accordance with the command given. It is more preferable that the control device 25 of the control signal reproducing device 20 also determines this cue signal, and if the cue signal lasts for 2 seconds, controls the tape drive mechanism to automatically rewind the magnetic tape M. .

The other magnetic heads 21, 22 are connected to a known reproduction/recording circuit 26. Music signals, audio signals, etc. reproduced from the magnetic heads 21 and 22 are converted into sound by the left and right speakers 28 and become background sound. The first magnetic tape M. It is possible to record desired music or the like from the microphone 27 on the second track.

The control device 25 responds to human signals from a key human power device 29 including forward, reverse, two rewind, playback, and record keys to operate the playback/recording circuit 2B, changeover switches 37, 38 . Controls the magnetic tape drive mechanism, etc.

For example, as shown in FIG. 2, on the third track of the magnetic tape M, a display command signal for a certain character is recorded between the two sequential feed cue signals a on the fourth track. do. first cue signal a
When the signal is outputted from the reproduction circuit 35 and applied to the still image reproduction device IO, the magnetic head 13 is sent one track in the forward direction. As a result, the video signal of the next image is output from the reproduction processing circuit 18 and displayed on the CRT 40. After this image switching, 1 display command signal is reproduced and the demodulation circuit 3
3, the character is read out via the S/P conversion circuit 41.
Since the signal is supplied to the generator 42, a video signal of the specified character is generated from the character generator 43 and displayed superimposed on the displayed still image. After this, the displayed character disappears. Then, when the cue signal a for sequential forwarding is read out again, the image on the CRT 40 is switched to the next one by one track forwarding. Of course, during this time, the first sound is heard from the speaker 28. Music etc. are being played from the second track.

To write the cue signal, switch the changeover switch 38 to the recording circuit 3B.
This can be done by manually applying a 1 KHz frequency signal to the recording circuit 36 at the desired time.

For example, a writing device may be used that includes an IKHz oscillation circuit, a gate circuit that controls the output of the oscillation circuit, and a timer that determines the time to open the gate of the gate circuit.

By setting or switching the set time of the timer in response to input of a forward command or a return command, an IKHz signal lasting 0.3 seconds or 2 seconds can be obtained. Such a writing circuit is provided in the still image reproducing device 10, and the device is activated by a forward key or the like provided in the device 10, and the output signal of this device is applied to the input terminal of the recording circuit 36. You may also do so.

Character display command signals are written on the magnetic tape M by manual means of character codes such as keys and various command codes, and by means of storage thereof.

This can be done using a writing device that includes an FSK modulation circuit. A character code with a number of steps manually created in advance,
The command code signal is stored in the memory and read out from the memory in response to the human power from the timing human power means.
By performing X modulation and inputting the data manually from the input terminal of the recording circuit 3B, a plurality of characters can be written in a short time. In the control signal reproducing device 20, the recording circuit 34 may be used as a recording/modulating circuit to provide parallel display command signals.

S/P conversion circuit 41 shown in FIG. Character generator 42. Of course, it is also possible to include the synchronization separation circuit 432 synthesis circuit 44 in the control signal reproduction device 20 or the still image reproduction device IO.

In the above embodiment, the character display command signal and the screen switching signal are recorded on separate tracks, but if these signals have different frequencies and a frequency discrimination circuit is provided, these signals can be recorded on one track. You can also write.

In addition, the binary code is used as a screen switching signal in FSX.
(Frequency shift keying) modulation may also be used. In this case, the reproduction circuit 35 would require a demodulation circuit. An encoder is also provided to decipher the demodulated binary code.

The output of this encoder (for example, a forward signal, a reverse signal, a return signal, etc.) is provided to a still image reproducing device. Using an 8-bit binary code, in addition to screen switching, it is also possible to specify one or more of multiple still image playback devices, and one control signal playback device can handle multiple still image playback devices. Can control playback devices.

The present invention is applicable not only to a system that displays one still image on one CRT, but also to a so-called multi-screen system in which a plurality of CRTs are arranged vertically and horizontally. In this case, even if you switch and display characters on each screen.

The entire screen may be switched at once to display characters.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the invention. FIG. 2 is a diagram showing how signals are recorded on a magnetic tape. 10...Still image reproduction device. 11...Control device. 12...Magnetic disk. 19...Cue signal detection circuit. 20... Control signal reproducing device. 42...Character cost generator. 44...Synthesis circuit. M...Magnetic tape. that's all

Claims (1)

[Claims] Still image reproducing means for reproducing and outputting a still video signal recorded on a first recording medium; An image control means for outputting; a screen switching control means for controlling to switch still video signals to be reproduced from the first recording medium in response to the outputted screen switching signal; a character specified by the outputted character display command signal; means for generating a video signal representing the character, and means for synthesizing the still video signal output from the still image reproduction means and the video signal representing the character. Still image playback system.