NL8203715A - Rotatable registration medium. - Google Patents

Rotatable registration medium. Download PDF

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Publication number
NL8203715A
NL8203715A NL8203715A NL8203715A NL8203715A NL 8203715 A NL8203715 A NL 8203715A NL 8203715 A NL8203715 A NL 8203715A NL 8203715 A NL8203715 A NL 8203715A NL 8203715 A NL8203715 A NL 8203715A
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NL
Netherlands
Prior art keywords
signal
playback
track
recorded
interval
Prior art date
Application number
NL8203715A
Other languages
Dutch (nl)
Original Assignee
Victor Company Of Japan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP15160681 priority Critical
Priority to JP56151606A priority patent/JPS6327780B2/ja
Priority to JP15235281 priority
Priority to JP56152352A priority patent/JPH0134431B2/ja
Application filed by Victor Company Of Japan filed Critical Victor Company Of Japan
Publication of NL8203715A publication Critical patent/NL8203715A/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/91Television signal processing therefor
    • H04N5/92Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B5/00Electrically-operated educational appliances
    • G09B5/06Electrically-operated educational appliances with both visual and audible presentation of the material to be studied
    • G09B5/065Combinations of audio and video presentations, e.g. videotapes, videodiscs, television systems
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00Head arrangements not specific to the method of recording or reproducing
    • G11B21/02Driving or moving of heads
    • G11B21/022Programmed access in sequence to indexed parts of operating record carriers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/76Television signal recording
    • H04N5/91Television signal processing therefor
    • H04N5/92Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/9201Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal
    • H04N5/9205Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal the additional signal being at least another television signal

Description

\

Rotatable recording medium.

The invention relates to a rotatable recording medium and in particular to a rotatable recording medium of which a jumping signal recorded thereon is played by a playing element and the playing element is shifted (skips) to an adjacent track for playing a video. and audio signals in a playback device, each jump signal with the audio signal is recorded such that the reproduced sound is not interrupted even when the playback element is skipped.

In US patents 315 * 283 and h.322.836 proposals have been made for a new signal recording and / or playback system. Under this proposed system. The recording system pits in correspondence with an information signal which is recorded along a spiral-shaped track on a flat rotatable recording medium (hereinafter simply referred to as a plate), without forming a groove therein. In the playback system, a playback needle follows this track to display the bet recorded information signal in response to varieties of an electrostatic capacitance.

Since guide grooves for guiding the playback needle are not provided on the record, it becomes necessary to record pilot or reference signals on the record on a track of a program information signal or in the vicinity thereof. During playback, the reference 25 signals are displayed together with the program information signal.

Tracking control is performed such that the playback needle accurately follows the track in response to the displayed reference signals.

By using this previously proposed system, there is no possibility whatsoever that the playback needle or the record will be damaged since the recording track has no groove. The playback needle can follow the same portion of the track repeatedly many times, allowing for a special mode of playback, such as a still picture display, a slow-motion playback or an accelerated return. the captured information signal is a video signal.

In order to accomplish the aforementioned special display, a jump pulse is provided by a special display control circuit and this jump pulse is coupled to a track control coil in a signal pick-up playback device in order to - move the needle to a track next to 10. Because the? track is spiral, for example, when displaying a stationary image, the playback needle is moved to an adjacent track in the direction of the circumference of the record once for each revolution of the record. During slow-motion playback, the playback needle is moved to an adjacent track in the circumference of the record circumference once for a predetermined number of revolutions of the record that is greater than or equal to one. Furthermore, in fast playback, the playback needle is moved to a track toward the inner edge of the record.

Thus, the previously discussed known special mode of playback was performed by displaying a still picture, a slow-motion play and an accelerated play-back with respect to a portion of a program which is subsequently recorded in the tracks formed on the record.

However, there is now a demand for the recording and playback of various information programs on the record. Thus, it is highly desirable to establish a new special display system for obtaining an image 30 by special display such as a displayed image obtained by assembling separately recorded information, and a displayed image obtained by choosing information from a number of recorded information.

The object of the invention is to realize a new plate which answers the question just mentioned.

8203715 - 3 -

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That is, the aim has been to achieve a record on which a jump signal has been recorded at predetermined locations in order to move the playback element to an adjacent track so as to suitably extract from different program video. suitably select information recorded in each track according to the jump signal obtained during playback to obtain a displayed image. However, it was found that if the audio signal is normally recorded in the record, interruptions in the displayed audio information were objectionably interrupted in the selective playback of the program from said program video information. That is, when the playback element is moved within a virtual suppression time of the video signal recorded in the track, in the reproduced image obtained by the played video signal after said movement, no annoying phenomena occur . However, an interrupt is introduced in the audio signal.

Thus, it is generally the object of the invention to provide a new and useful rotatable recording medium in which the above described drawbacks have been overcome.

Another and more specific object of the invention is to provide a rotatable recording medium 25 of which a jump signal recorded thereon is played by a playback element and the playback element is moved (skips) to an adjacent track for video and audio playback signals in a playback device, which jump signal is recorded with the audio signal such that the sound played is not interrupted even when the playback element is moved. According to the rotary recording medium of the invention, adjacent audio tracks record identical audio information (including soundless signal) during a predetermined interval of each of the 35 tracks. The playback element of the playback device is moved to the adjacent track such that a break point of the information content of the audio signal is avoided.

Other objects and further features of the invention will become apparent in the following description in detail which refers to a drawing.

Fig. 1 is a systematise]! block diagram showing an exemplary embodiment of a recording system for a plate according to the invention.

FIG. 2A and FIG. 2B show signal shapes of a spring control signal recorded on the plate, respectively.

Fig. 3 shows a first embodiment of a track pattern on the plate according to the invention.

FIG. k is a systematise]! block diagram showing an exemplary embodiment of a playback device for playing the record shown in Fig. 3.

Fig. 5 shows a second exemplary embodiment of a track pattern on the plate, according to the invention.

FIG. 6 is a systematic !! block diagram showing an exemplary embodiment of a playback device for playing the record shown in Fig. 5.

Fig. T is a systematise !! block diagram showing an embodiment of a concrete construction of a control circuit in the block diagram shown in Fig. 6.

Fig. 8 (A) through FIG. 8 (E) respectively show signal shapes of output signals of those shown in FIG.

7 control chain shown.

First, a description is given of a block system which is an essential. part of an exemplary embodiment of a recording system for recording signals on a plate according to the invention, namely by referring to Fig. 1. An audio signal in a first channel and an audio signal in a second channel are cut.

35 applied to each other at input terminals 11 and 12. The 8203715-5 audio signal in the first channel is supplied to a frequency modulator 16 in which a first channel FM audio signal is obtained by frequency modulating a carrier that has a frequency of, for example, 3 MHz.

On the other hand, the audio signal in the second channel is fed to a frequency modulator 17 in which a second channel FM audio signal is obtained by frequency modulation of a carrier with a frequency of, for example, 3.73 MHz. The first and second channel FM audio signals are applied to a mixing circuit 18, respectively. A video signal applied to an input terminal 135 is gated by means of a gate pulse in a gate 19. This gate pulse is applied to an input terminal 1U simultaneously with a jump control signal applied to an input terminal 15 and will be rewritten hereinafter. Thus, said video signal is removed from the video signal recording interval after a color information signal within a horizontal line period, and supplied to a mixing circuit 20. The mixing circuit 20 mixes the video output signal from the gate 19 and from the input terminal 20. 15, the jump control signal obtained, and inputs the jump control signal into the aforementioned deleted video signal recording interval and supplies the mixed video signal to the mixing circuit 18. The mixed video signal is multiplexed with the aforementioned first and second channel FM audio signals in the mixing circuit 18. Measures are taken such that the band of the video signal applied to the input klsa 13 does not overlap with the bands of the first and second channel FM audio signals. For example, said video signal is a composite color-30 video signal in which a low-band converted carrier color signal is subjected to band-shearing multiplexing with a high-frequency portion of a luminance signal having a band limit to an upper boundary frequency of about 3 MHz.

The said jump control signal is a f 8203715-6 pulse signal with a frequency of, for example, 500 kHz and is multiplexed with the video signal in the mixing circuit 20 as shown in Fig. 2A. The jump control signal B contains five bits. A first bit B1 of the jump control signal B indicates whether the jump operation is to be performed.

If the first bit is "1" (set), the jump operation is performed, and if the first bit is "0" (not set), the jump operation is not performed. A second bit B2 indicates the direction of the skip on, and "1" indicates 10 the direction to the periphery of the record, while "0" indicates the direction to the inner edge of the record. The third and fourth bits B3 and indicate the mode of playback and four modes of playback can be specified by setting these bits to "00", "01", "10", and "11." Here, "00" indicates a first mode of playback, "01" a second mode, and "10" a third way.

A fifth bit B5 indicates the number of jumps. If the first bit B1 is "1", "0" indicates as fifth bit B5 a single jump and "1" two jumps. The jump control signal B has its place between horizontal synchronizing signals HD 20 and HD in an interval in which a color information signal CB does not occur. In the example given in Fig. 2B, the first bit B1 is "1", the second bit B2 "0", the third bit B3 "1", the fourth bit Bit · "0" and the fifth bit B5 "1". This indicates that the jump is performed, that the jump is directed to the inner edge of the plate, that the display mode is the third mode, and that the number of jumps is two.

The multiplexed signal obtained from the mixing circuit 18 is fed to a frequency I modulator 21 in which the signal is converted to a frequency modulated signal form with a carrier deviation bandwidth from 6.1 MHz to 7.9 MHz, to give an example. This frequency-modulated signal is generated from an output terminal 22 as a main information signal is supplied, for example, to a light modulator (not shown) and converted into a modulated light beam by modulating an 8203715-7 laser light source. The modulated light beam is directed to a light-sensitive material covering a master plate which is rotated. A main track with rows of self-contained pits is formed in accordance with the repetition frequency of the main information signal by a known development process. Thus, the video signal and the audio signals in two channels are simultaneously and simultaneously recorded in the same main track. A first and a second reference signal fp1 and fp2 for track-10 tracking are applied to a second light modulator (not shown) and similarly converted to a modulated light beam by modulating a laser light source. This creates auxiliary tracks with rows of self-standing pits between the main tracks. The plate is made from the aforesaid described master plate with the aid of a known manufacturing process.

As shown in Fig. 3, a plate 30 manufactured in the manner described above is described with the main information signal. along a spiral track T through 20 a revolution of the plate. Tracks of the first reference signal fp1 are drawn with dotted lines, while the tracks of the second reference signal fp2 are drawn with dashed lines. The positions of the vertical synchronization signals of the respective fields are indicated by reference characters V1, V2, V3, ..., and the successive sections of the track corresponding to a single revolution of the plate and belong to a single spiral track T, are indicated by track windings t1, t2, t3, .... Furthermore, a third reference signal fp3 is fixed at the start / end positions V1, '30 V5, V9S .... of each of the track windings t1, t2, t3 »♦ ·., that is, at positions where the reference signals fp1 and fp2 alternate.

In an interval between positions V1 and V9, (such an interval will hereinafter be referred to as an interval V1, V9) on the spiral track of the plate, an 8203715-8 program presents a problem and answers X , Y and Z returns what to choose an answer from, captured, for example. A program for delivery and commentary on the answer when the answer X is selected is recorded in intervals V9 - V13 and V21 - V25 in accordance with said program. Similarly, programs for commenting on the answer when the answers Y and Z are selected are recorded in intervals V13 - V17 and V25 - V29, respectively, and intervals V17 - V21 and 10 V29 - V33. presenting a subsequent problem is recorded without interruption towards the inner edge of the plate from position V33 · A jump control signal containing the information "10101" as shown in Fig. 2B for specifying two jumps to the inner edge of the 15 plate in the third display mode, is fixed at position V9.

In addition, a jump control signal containing the information "10010" for specifying a single jump to the inner edge of the plate in the second display mode is fixed at the position p. Similarly, jump control signals 20 for specifying two tracks to the inner edge are of the record in the first display mode, the second display mode, the third display mode and the first display mode, respectively, fixed at positions Υ13 »V1J, V21 and V25 · In addition, a jump signal for specifying a single jump 25 to the inner edge of the record is set to position V29 in the second display mode For each program, the audio signal is uninterrupted, it is essential that the audio signal is uninterrupted during an interval in which the playback needle is moved (skips) to a 30 adjacent track, in particular in a time interval immediately after the position V9 where the jump w is outputted by the jump control signal fixed at position V9. Thus, according to the invention, the same audio signal or a soundless audio signal (i.e., the audio signal 35 is not recorded) is recorded in the intervals V9-a and 8203715 * * - 9 - V17-C. In addition, according to the manner in which the jump is performed by the jump control signal recorded at the position p, there is the same audio signal as recorded in the interval V9-a or the silent audio signal 5 recorded in an interval V13-h so that no deduction is entered between intervals V9-a and V13-b. Furthermore, for such reasons, the intervals V9-a, V13-b, ViT-c, V21-ds V25-e, V29-f, V33-gj ... are all silent, to give a prediction.

A description will now be given of an exemplary embodiment of a display device for playing the record 30 shown in Fig. 3, with reference to Fig. 4. The record 30 is placed on a turntable 31 and rotated by a motor 32 with, for example, a speed of 15 900 rpm, A signal pickup element 33 »used as a playback converter, has a playback needle 3 ^ - and moves without interruption and in a straight direction in a direction from the outer circumference to the inner edge of the record at a speed equal to the track spacing divided by the revolution time of the turntable 31 during normal forward play.

Thus, the playback needle 3 of the signal pickup element 33 extends in a radial direction over the rotating plate 30 and thus scans the spiral track on the plate 30. One of the plate 30 through the playback needle 3 of the signal pickup element 33 in the form of minor variations in the electrostatic capacitance is fed to a preamplifier 35 with a resonant circuit. The resonant frequency of the resonant circuit varies in response to this variation in the electrostatic capacitance and is converted into a signal of a desired level. The output signal obtained from the preamplifier 35 is demodulated to the original main information signal by means of a demodiolator 36 and is obtained as an output signal via an output terminal 37.

The output of the preamplifier 35 35 is applied to a low-pass filter 38 in which the reference signals fp1, fp2 and fp3 are isolated. The output reference signals pass through an automatic amplification control circuit 39 and are applied to amplifiers 1 + 0, in and 1 + 2, respectively. Here, each of the amplifiers 1 + 0, 1 + 1 and h2 5 is a kind of a band-pass amplifier, respectively designed to have steep pass-frequency properties at only the respective frequencies fp1, fp2 and fp3.

As a result, the signals with the frequencies fp1 and fp2 are isolated in and obtained from the amplifiers 10 + 0 and in, respectively. These signals pass through level adjusters 1 + 3 and 1 + 1 +, respectively, in which the levels of the signals are adjusted. The obtained signals are then applied to a gate switching circuit i + 5. The reference signal fp3, which is isolated in and amplified by the band-pass amplifier 1 + 2, is supplied to a switching signal generator 1 + 6.

The gate switching circuit 1 + 5 performs the exchange of the reference signals fp1 and fp2 at each revolution period of the record 30 in normal playback in response to the switching signal generated by the switching signal generator 1 + 6, which switching signal is on the gate switching circuit 1 + 5 is supplied. As a result of the switching signal that changes sign every 1/15 second, the signals fp1 and fp2 are alternately supplied to the detection circuits 1 + T and 1 + 8 from the gate switching circuit 1 + 5 · 25 The detection circuits 1 + T and 1 + 8 detect the envelopes of the respective input reference signals and convert the input reference signals into DC voltages. These DC voltages are then applied to a differential amplifier 1 + 9 · The differential amplifier 1 + 9 compares the output signals of the two detection circuits 1 + T and 1 + 8 which vary in response to the played levels of the reference signals fp1 and fp2, and generates a tracking error output signal indicating the direction of the tracking error and the magnitude of the error. This tracking error signal is amplified to a certain level by a power amplifier 50.

8203715 - 11 -

The output signal from the power amplifier 50 is applied to tracking coils of the signal pickup element 33 as a control signal in order to control these tracking coils. Here, the tracking control is performed with respect to the playback needle so that the tracking error signal becomes zero, which is said to mean that the playback needle 3b accurately traces the track T on the record 30.

The output of the demodulator 36 is applied to a jump control signal detector 51 where the jump control signal demodulated together with the video signal is detected. The detected jump control signal is applied to a selector switch 52.

The selector switch 52 passes a predetermined type of jump control signal and supplies it to a jump pulse generator 15. 5I + selected from control signals obtained from the detector 51, in accordance with the setting of ab selector switch 52 which is established by means of an adjustment signal via a terminal 53. The jump pulse generator 5 ^ generates a jump pulse for the performing a jump in the direction of the inner edge or of the circumference of the plate according to the type of spring control signal obtained via selector switch 52. The generated jump pulse is applied to the tracking control coils of the signal pickup element 33 via the power amplifier 50. Here, the playback needle 3n is suddenly moved towards the inner edge or the periphery of the record and thus to an adjacent track. In addition, the jump pulse from the jump pulse generator is supplied to the switching signal generator b6 so that a switching signal is generated and supplied to the gate switching circuit 1 * 5 · 30 When the record 30 shown in Fig. 3 is played by the playback device shown in Fig. U, the operator releases the problem that occurs when displaying the interval V1 - V9 · If the operator wishes to choose the answer X as an answer to this problem, to give an example, a movable contact of the 8203715 12 - switch 52 connected to a contact 52a to select the first spring mode. The playback needle returns the recorded information (the information content is a problem) which is present in the interval V1-V9, and starts scanning 5 along the track t3 without having to make a jump in the position V9. The replay stylus then scans the interval V9 - V13 and thereby comments on the answer X spring. After sampling the interval V9 - V13, the playback needle is moved three times into the position V13 and the needle then scans the interval V21 - V25 to continue springing the comment on the answer X. The playback needle 3 ^ jumps to the position V25 twice and reaches the position V33 so as to spring up the next problem from there. Hereby, the playback needle is moved three times in positions V13 and V25 and shifted to positions slightly beyond positions V21 and V33. However, because the intervals V13-b and V21-d are respectively described with the same audio signal or with a soundless signal, and the intervals V25-e and V33-g on the same line are described with the same audio-20 signal or the same soundless signal As described above, there is no interruption in the content of the spring-fed audio signal during discussed displacement of the playback needle 3 ^.

When choosing the answer Y, the movable contact of the switch 52 is connected to a contact 52b in order to select the above-mentioned second spring mode. In this case, the playback needle jumps 3 ^ once to the position p after springing the problem in the interval V1-V9 and the needle scans the interval V13-V17 to play the comment on the answer Y. After playback of the interval V13 - V17, the playback needle jumps 3 ^ times to the position V17 and then continues to play the response to the answer Y by sensing the interval V25 - V29. The playback needle 3 ^ jumps once at position V29 to reach position V33 and starts to show 8203715-13 - hence the following problem. The playback needle is moved 3 verplaatst once at positions p and V29 and twice at position V17. Because the intervals V9-a and V13-b are described with the same audio signal or with a 5 silent signal, the intervals V17-c and V25-e with the same audio signal or silent signal and the intervals V29-f and V33-g with the same audio signal or silent signal, no interruption is entered in the content of the played audio signal during the skip of the playback needle 3¾.

When choosing the answer Z, the movable contact of the switch 52 is connected to a contact 52c to choose said third display mode. In this case, the playback needle skips 3 ^ twice at the position V9 after playing the problem in the interval V1 - V9, and the 15 needle scans the interval VI7 - V21 to display the comment on the reply Z. After playback of the interval V17-V2T, the playback needle skips 3¾ twice at the position V21 and then the needle continues the playback of the comment to scan the answer Z through the interval V29 - V33. The playback needle 3 then reaches the position V33 and from there starts to display the following problem. The replay needle is moved 3¼ times at positions V9 and V21. However, since the intervals V9 - a and V17-c are described with the same audio signal or soundless signal and the intervals V21-d and V29-f with the same audio signal or soundless signal, no interrupt is entered in the content of the reproduced audio signal during the movement of the playback needle 3 ^ -.

Next, a description is given of a second embodiment of the plate according to the invention by referring to Fig. 5. In Fig. 5, the parts which are the same as corresponding parts in Fig. 3 are indicated with the same reference signs and no description of these parts will be given. In a plate 60, a video signal of a first program 35 is recorded in an interval V1 - V3, that is, from position V1 to position 8203715-1U - V3 on track t1. A video signal of the second program with a content different from that of the first program is recorded in an interval V3 - V7. Similarly, the first program is recorded in intervals V7 - V11, V15 - V19 »5 V23 - V27,. .., and the second program is stored in intervals V11 - V15, V19 - V23, .... Thus, the video signal of the first program is played in the order of intervals V1 -V3, V7-V11, V15-V19 > ---- and is continuous. Likewise, the video signal of the second program is played in the order of the intervals V3 - V7, V11 - V15, V19 - V23, ... and continues. With regard to the audio signals, these are recorded as followfc. First, the first channel audio signal is recorded in the following manner. The first channel audio signal with a content corresponding to the first program video signal in the intervals V1 - V3 and V7 - k is written in the interval VI - j up to a position j which is 1.5 fields beyond the position V5 is calculated from position V1, via positions i and V3 to V6. The first channel audio signal having a content corresponding to the first program video signal in intervals i-V3 and V7-k, i.e. the same audio signal as that in an interval i-j, is recorded in an interval j-k. Thus, the content of the first channel audio signal is interrupted at the position j. An audio signal corresponding to the content of the video signal at the intervals k-V11 and V15-m and which continues in the interval jk at the position k with the audio signal is recorded in an interval k-1. An audio signal that is the same as that recorded in the interval k-1 is recorded in an interval 1 - m and the content has an interruption in position 1. In addition, an audio signal that continues with the audio signal recorded in the interval 1 - m at the position m is recorded in the interval m - n. An audio signal that is the same as that recorded in the interval m-n is recorded in an interval n - 0.

35 The second channel audio signal is recorded 8203715 <η * - 15 - in the following manner. The second channel audio signal corresponding to the content of the second program video signal is recorded in the interval V3 - V7 · An audio signal that is the same as the audio signal corresponding to the video-5 signal in the interval V11 - 1 , is recorded in an interval V7-k. Likewise, the audio signal recorded in the interval k-1 is the same as the audio signal recorded in the interval j-k. In addition, the audio signals recorded in intervals k-1 and 1-k correspond to the video signals recorded in intervals 1-V15 and V19-U. The second channel audio signal has sub-signatures at positions k and m.

An exemplary embodiment of a display device for playing the record 60 is shown in FIG. In Fig. 6, the parts which are the same as the corresponding parts in Fig. K are indicated by the same reference signs and a description of these parts will be omitted.

The first and second channel audio signals, obtained from the demodulator 36, are applied to contacts 6la and 6lh of a switch 61, respectively. A weighing contact of the switch 61 is converted and connected to one of the contacts correspondingly. a signal specifying a display mode applied to an input terminal 62. That is, if the signal from the input terminal 62 is a signal specifying a first display mode, the weighing contact of the switch 61 is connected to the contact 61a. On the other hand, if the signal from the input terminal 62 is a signal specifying a second display mode, the weighing contact of the switch 61 is connected to the contact 61h. The first or second channel audio signal, which is optionally passed through the switch 61, is obtained from an output terminal 63.

A display-specifying signal identical to that applied to input terminal 62 is applied 8203715-16 to a control circuit 6k from input terminal 65. If the program video signal to be selected is the first program signal, the signal specifying the first display mode applied to the input terminal 65. If, on the other hand, the program video signal to be selected is the second program signal, the signal specifying the second display mode is applied to the input terminal 65.

For example, the control circuit 6k has a structure as shown in Fig. J. An output from an oscillator 70 is applied to a counter 71 as a clock pulse signal.

The counter 71 is further supplied with the third reference signal fp3 from the amplifier k2 as a reset signal via a terminal 72. An output signal from the counter 71 is supplied to a decoder 73. The signals P and Q respectively are shown in Figures 8 (A) and 8 (B) obtained from decoder 73 are applied to a contact q. of a switch 7 ^ The inverted signals P and Q respectively shown in Figures 8 (D) and 8 (E) obtained by inverting the signals P and Q in inverters 75a and 75b, respectively, are applied to a contact r of the shift switch 7 ^ ·· A movable contact of the shift switch 7 ^ is converted and connected to the contact q or r to the first or second display mode, specified by the display-specifying signal from the terminal 25 terminal 65. The signals P and Q are obtained at output terminals 76a and 76b, respectively, during the first reproduction mode, and the signals P and 5 are obtained at the output terminals 76a and 76b, respectively, during the second reproduction mode.

The signals obtained at the output terminals 76a and 76b are applied to the gate switching circuit as gate switching signals, respectively. In addition, a signal R, shown in Fig. 8 (C), is obtained from the decoder 73 and supplied through an output terminal 76c. This signal R is applied to the jump pulse generator 5, which generates a jump pulse for moving the playback needle 3¼ over a track distance.

8203715 ο * 1Τ -

When Bet plays the first program video signal and Bet first channel audio signal Corresponding to this first program video signal, the Bet signal specifying the first spring data is supplied to the input terminals 5 62 and 65 · In this state, the playback needle 3U information recorded in Bet interval V1 - V3 spring and the needle is moved once at position V3. Then the play needle scans 3 ^ Bet interval V7 - V11 and moves once at position V11. Play needle 3¾ then scans Bet interval 10 V15 - V19 and moves once at position V19

The deflection by the playback needle is continued in the same mode thereafter. As a result, the intervals V1 - V3, V7 - V11, V15 - V19, become. - given without interruption. The first program video signal is obtained from the output terminal 37 and the first channel audio signal corresponding to the first program video signal is obtained from the output terminal 63. The playback needle 3 is moved once at the positions V3j. V11, V19 »···· EcBter is, like BierBesBesBreven,

The first channel audio signal recorded in Bet interval i-j, 20 Same as Bet audio signal recorded in Bet interval j-k. In the same mode, the audio signals recorded in intervals k - 1 and 1 - m are equal, and the audio signals recorded in intervals m - nenn - o are equal. In this mode, there is no interruption in the audio signal transmitted inBoud van Bet when the playback needle 3b is moved.

On the other hand, when the Bet TV program video signal and the TV channel audio signal corresponding to the TV program video signal are output, the signal specifying the TV mode 2 is supplied to the input terminals 62 and 65. The playback needle 3 ^ information recorded in the interval V3 - V7 spring * and is moved once at position V7. Then the play needle touches 3 ^ ·

Bet interval V11 - VI5 and move the needle once moved 35 at the position VI5 · The play needle 3¼ then scans the interval V19 - 8203715 - 18 - V23 and moves once at position V23. Scanning through the reproducing needle 31 is then continued in the same mode. As a result, the intervals V3 - V7, V11 - V15, V19 - V23, ... are displayed without interruption.

The second program video signal is obtained from the output terminal 37 and the second channel audio signal corresponding to the second program video signal is obtained from the output terminal 63. The playback needle 3 jumps once at the positions V7, V15j "V239 ____ However, as described above, the second channel audio signal recorded in the interval jk is the same signal as the audio signal recorded in the interval k-1, for example, 00k are the audio signals recorded in the intervals 1 - m and m - n equal to each other, and the same applies to the audio signals recorded in the intervals n - 0 and the continuous interval of a single revolution of the plate 60. Thus, there is no interruption in the content of the displayed audio signal when the playback needle is moved 3 ^ - ·

The invention is not limited to the described embodiments: various variations and modifications can be made without departing from the scope of the invention.

8203715

Claims (4)

1. Rotatable recording medium, playable by means of a playback device having a playback element for displaying recorded signals from the rotating recording medium, the rotatable recording medium carrying different program video signals for each predetermined interval at a spiral track formed thereon, a jump control signal recorded at an end portion of the predetermined interval for moving the playback element to another turn of the track, and an audio signal recorded thereon, characterized, that the audio signal is recorded in such a way that a track interval (V9 - a, V13-b, V17-C, ------ i-V3, j-V7, k-V11, ----) that a track position immediately preceding a certain position where the playback element is moved in response to the jump control signal, and a track interval (V9-a, V13-b, V17 ~ c, ..., i-V3, «j- V7, K-V11 .....) that a certain track po sition immediately following the position where the playback element is moved have the same content.
Recording medium according to claim 1, characterized in that the audio signal with the same content, recorded in the track intervals, is a silent audio signal.
Recording medium according to claim 1, characterized in that the audio signal contains different channels of 25 audio signals corresponding to the video signal programs, and that the jump control signal is fixed at positions (79, 713, 717, ...). .. 73, 77, 711, ...) on each track turn ✓ of the spiral track such that the playback element jumps while avoiding positions (a, b, c, ... i, 30 j, k, .. ..) where the content of the audio signals of each channel will be interrupted if this content was played without interruption. *) ·. Recording medium according to claim 1, characterized in that the jump control signal contains display information (B3, Bk) 35 which determines which program video signal is optionally played by moving the playback element.
Recording medium according to claim k, characterized in that the jump control signal further contains information 5 (B5) indicating the number of times the playback element is to be moved. 8203715
NL8203715A 1981-09-25 1982-09-24 Rotatable registration medium. NL8203715A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP15160681 1981-09-25
JP56151606A JPS6327780B2 (en) 1981-09-25 1981-09-25
JP15235281 1981-09-26
JP56152352A JPH0134431B2 (en) 1981-09-26 1981-09-26

Publications (1)

Publication Number Publication Date
NL8203715A true NL8203715A (en) 1983-04-18

Family

ID=26480802

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8203715A NL8203715A (en) 1981-09-25 1982-09-24 Rotatable registration medium.

Country Status (4)

Country Link
DE (1) DE3235496C2 (en)
FR (1) FR2513789B1 (en)
GB (1) GB2107507B (en)
NL (1) NL8203715A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59221184A (en) * 1983-05-31 1984-12-12 Victor Co Of Japan Ltd Information recording disc and its reproducer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968692A (en) * 1956-10-08 1961-01-17 Ampex Electronic switching system for magnetic recorder and/or reproducer
US3476469A (en) * 1967-02-06 1969-11-04 Panopix Research Inc Motion picture film
DE2344125C2 (en) * 1973-04-11 1984-01-26 Ted Bildplatten Ag Aeg-Telefunken-Teldec, 6301 Zug, Ch
CA1130456A (en) * 1976-04-08 1982-08-24 Hisao Kinjo Information signal recording system
NL7908476A (en) * 1979-11-21 1981-06-16 Philips Nv Device for interactive image view.
JPS5812486A (en) * 1981-07-15 1983-01-24 Victor Co Of Japan Ltd Information signal recording disk

Also Published As

Publication number Publication date
GB2107507A (en) 1983-04-27
DE3235496C2 (en) 1984-09-20
GB2107507B (en) 1985-12-11
DE3235496A1 (en) 1983-04-21
FR2513789A1 (en) 1983-04-01
FR2513789B1 (en) 1986-03-07

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