KR850001636B1 - Recording system in vtr - Google Patents

Abstract

A video reproducing device which reproduces a signal from a disc by use of a reproducing element. The video disc is recorded with at least a first carrier signal which is modulated by an information signal having a synchronizing signal of a predetermined frenquency. The reproducing device comprises a motor for rotating the disc and a reference signal generating circuit for generating a reference signal having a frequency equal ao 1/N times the horizontal scanning frequency of a standard television system.

Description

Recording and Playback Method of Rotating Recording Media

1 (a) and 1 (b) are partial waveform diagrams of video signals of respective television systems.

2 is a block diagram showing an example of rotational speed control.

3, 4, 6 and 7 are block schematic diagrams illustrating respective embodiments of the present invention scheme, respectively.

5 is a plan view showing the relationship of recording signal positions of a video desk of a VAL method.

The present invention relates to a recording and reproducing method of a rotating recording medium, wherein standard television images of all television systems are controlled by controlling the number of rotations of the rotating recording medium so that the horizontal scanning frequency of the recorded video signal is reproduced at a predetermined frequency determined by the television system. It is an object of the present invention to provide a method of recording and reproducing a rotating recording medium which can reproduce a signal most appropriately.

Conventionally, a rotating recording medium (hereinafter referred to as a video disk) in which a standard video signal is recorded by a change in the geometric shape of a fit on a rotating recording medium is known and reproduced by a video disk reproducing apparatus and supplied to an external television receiver for monitoring. Regeneration is being done. However, it is well known that the current standard video signal TV system is not unified in the world and is more incompatible with each other. However, some standard video signal recording standard video signals that are currently published are reproduced at any time. Since a video disc recorded in a television format suitable for the present invention can be reproduced in a region different from that of the television system, the above-described television receiver could not normally be played back.

In the past, there has been no compatibility to play video discs released in different television systems in different regions as described above. In addition, since a television receiver which is widely used is currently used to display reproduced images, it is impossible to adopt a video disc original signal format.

The present invention has eliminated some of the irrationalities described below in accordance with the current television system by studying the recording method of the video disk, and has compatibility between the video disks of different television systems. Each embodiment will be described with reference to the accompanying drawings. do. Firstly, the difference between the television system and the first main advantages are the scanning player and the field frequency. In television systems such as Japan and the United States, there are 525 scan players per frame, a field frequency of 60 Hz (59.94 Hz in the case of the Cal), and 625 scan players per frame in other major television systems in the European region. The field frequency is 50 Hz.

The second main difference is that when the standard video signal is a color video signal, there are NTSC system, PAL system and SECAM system depending on the transmission form of the color signal. A carrier color signal obtained by modulating the carrier frequency suppression square two phase amplitude as the signals I and Q is transmitted. In addition, one chrominance signal is transmitted as a carrier suppression amplitude modulated wave whose phase is inverted every one horizontal scanning period (hereinafter referred to as 1H). Two types of carrier color signals obtained by frequency modulation of 4.40625 MHz and 4.25 MHz, respectively, are sequentially transmitted every 1H.

In this case, the video disc playback apparatus only plays back the standard video signal recorded on the video disc. Therefore, the modulation format of the color signal recorded on the video disc does not have to be suitable for the NTSC, APL, and SECAM methods. When a color signal is output from the external monitor television receiver as a standard color video signal, the color signal may be converted into a predetermined modulation format suitable for the television system. Therefore, with respect to the difference in the dominant form of the color signals, the video disc playback apparatus can be made compatible with the conversion apparatus for obtaining a predetermined carrier color signal of the NTSC system, the APL system or the SECAM system. Therefore, the present invention is intended to be compatible in consideration of the first major difference and to use a very close frequency that the horizontal scanning frequency f _H of different television systems is only 0.7% difference.

For the sake of clarity, the NTSC type color television method (hereinafter referred to as n method) and horizontal scanning with 525 horizontal frequency lines per frame and a field frequency of 59.94 Hz (approximately 60 Hz) are used. For example, 625 athletes per frame and field frequency of 5Hz PAL color television system and SECAM system color television system (hereinafter, they are called P system and use P-subscript). Also, it distinguishes a disc and a playback device, and a video disc in which an n-type horizontal scan player and a field frequency color video signal are recorded. It is written in Dp (as for the carrier color signal of the color image signal, it is not necessary to record in the n method and the P method as described above). Further, a playback device for reproducing the video disk Dn as an n-color color television system color video signal will be described as Pn and a playback device for reproducing the video disk Dp as a p-color color television system color video signal.

1H of the n-type color video signal indicated by THn in FIG. 1 (a) is 63.5 Hz, and 0.7 as described above compared to 64 Hz, which is 1H of the P-type color video signal represented by THP in FIG. 1 (b). There is only a difference of%. Therefore, when playing the video disc Dp with the playback device Pn, the horizontal scan frequency of the color video signal reproduced from the video disc Dp is not the P method but is rotated by 0.7% faster than the predetermined speed so that the video disk Dp is n-type. The device color video signal of the mere 1 hour of program content is about 25 seconds fast. On the other hand, in the circuit in the reproducing apparatus Pn, if the reproducing horizontal scanning frequency f _H is of the n type, the electric circuit operates without any inconvenience, regardless of the program contents.

Of course, at this time, the per-frame diagonal is 625 of the video disc Dp, and the field frequency is 0.7% higher than 50 Hz. If you use a commercially available n-type color television receiver as a monitor that receives and displays this signal, this TV receiver is 60Hz as standard, but it is generally adjustable at 50Hz by the front panel, and the vertical direction of the image is slightly Although it becomes an extended image and some unreasonableness arises, the synchronized image is obtained both horizontally and vertically. In other words, by controlling the rotation speed of the video disk Dp, the n-type playback device Pn and the color television receiver for the system are not complete, but can be reproduced with practical use.

Likewise, by rotating the video disc Dn 0.7% later than the predetermined speed, the horizontal scan frequency of the color video signal reproduced from the disc Dn is P type, and the program takes about 25 seconds longer for 1 hour. Although it is slightly contracted and regenerated, the regeneration device Pp and the P type color television receiver can be reproduced sufficiently practically. SUMMARY OF THE INVENTION The present invention has been made in view of the above, and it is intended to provide compatibility with each other without causing any change in the current TV system of the present world and the color television receiver already in widespread use. Even if a video disc of either Dn or Dp is played back, the number of rotations of the video disc Dp (or Dn) is set so that the predetermined horizontal scanning frequency f _Hn (or f _Hp ) of the video disk player Pn (or Pp) to be played back is played. To control it.

Furthermore, it is not directly related to the present invention, but if such a recording and reproducing method is popularized, it is necessary to improve the TV receiver in such a way that the above-described adjustment of the field frequency or the extension or contraction of the image in the up-and-down direction is less expensive. It is easily possible with the technique, and in such a case, full compatibility can be obtained by the present invention. Also, for recording and reproducing a rotating recording medium such as a video disc, the isometric speed method (hereinafter referred to as CAV method), which is always performed at a constant rotational speed regardless of the position of the recording device and playback device, and the recording device depending on the position of the recording device and playback device. There is an isotropic speed method (hereinafter referred to as CLV method) in which the relative linear velocity between the playback element and the rotating recording medium is changed to be constant.

Most of the present inventions are common to the CLV method as described below, but some of them relate only to the CAV method, and at that time, the object thereof is added. However, as described above, the present invention is to control the rotation speed of the video disc Dp (or Dn) such that the predetermined horizontal scanning frequency f _Hn (or f _Hp ) of the reproduction device Pn (or Pp) is reproduced, and a method of realizing this. As the reproduction scheme shown in the block system of FIG. That is, in FIG. 2, the color image signal picked up and reproduced by the playback element 2 from the video disk 1 is supplied to the band amplifier 4 via the head amplifier 3, where the required frequency components are filtered and amplified. After that, it is demodulated by the demodulation circuit (5) and output from the output terminal (6), while being supplied to the registration separator (7). The horizontal equalization symbol taken out from the registration separation circuit 7 is supplied to the comparator 8 where the horizontal scanning frequency f _Hn or f _Hp determined from the reference realization generator 9 with respect to the reproducing device P _n (or P _p ). Phase error is compared with the reference signal of the same frequency and the error signal according to the phase difference is subtracted.

The output error symbol of the comparator 8 is applied to the motor 10 for rotating the tin table to control the number of rotations thereof. This controls the rotation speed of the video mask 1 so that the frequency f _H of the reproduction horizontal synchronization symbol matches the frequency f _Hn (or f _Hp ) of the reference room.

However, in the above method, the color image signal recorded on the video disc is a carrier signal which is frequency-modulated, phase-modulated, or amplitude-modulated, so that the carrier can be separated by the video amplifier (1). It is difficult to realize the above-described method of performing a predetermined servo operation in the initial stage when the rotational speed of c) must be close to the normal rotational speed, and the rotational speed of the video mech 1 becomes close to the normal rotational speed.

(N은 정수)의 주파수에 선정된 회전수제어실호를 직접 또는 적당한 반송파에 실어서 n 방식(p방식)의 회전기록 매체를 기록작성하고 그것을 재생하여 회전수제어실호를 검출하여 이것과 기준실호와를 비교하므로써 비데오메스크의 회전수를 제어한다.Thus, in the first embodiment of the present invention, the carrier occupies the out of band, such as a carrier modulated with a color image room, and the horizontal scanning frequency f _Hn (or f _Hp ) or its

(N is an integer) The speed control signal selected by the frequency is loaded directly or on an appropriate carrier to record and create an n type (p type) rotation recording medium, and reproduce it to detect the speed control symbol and to obtain the reference number signal. The rotation speed of the video mask is controlled by comparing with.

배의 주파수로 변조된 반송파(회전수 검출실호)와의 주파수 분할 다충실호가 기록된 n 방식(또는 p방식)의 비데오메스크이며 칼라영상실호의 복조실호계통로와는 별도의 신호계통로에 설치한 회전수 제어신호검출회로(12)에 의해서 상기 회전수 검출신호를 재생신호로부터 검출한다. 여기서 회전수제어신호는 수평주사 주파수 f_Hn(또는 f_Hp)의

배의 주파수로 변조된 반송파로서 톤버스트파형을 하고 있어 그 포락선을 회전수제어신호 검출회로(12)에서 검출되도록 구성할 때에 p방식(또는 n방식)의 비데오메스크(11)의 넓은 회전수범위에 걸쳐서 검출할 수 있게되어 제2도의 방식과 같이 소정의 회전수 부근이 안될지라도 회전수제어신호를 검출할 수 있다.3 shows a block system path of the first embodiment of the present invention above. The same components as those in FIG. 1 of the same insect are denoted by the same reference numerals, and description thereof is omitted. Methoxy disk 11 of the example color image arc chamber the modulated carrier and the horizontal scanning frequency f _Hn (f _Hp, as described above

This is an n-type (or p-type) video mask that records frequency division multiplexing with a carrier wave modulated at twice the frequency, and is installed in a signal path separate from the demodulation room system of color image coding. The rotation speed control signal detection circuit 12 detects the rotation speed detection signal from the reproduction signal. Here, the rotation speed control signal has a horizontal scan frequency f _Hn (or f _Hp ).

Tone-burst waveform as a carrier modulated at double frequency, and when the envelope is configured to be detected by the rotation speed control signal detection circuit 12, the wide rotation speed of the p-type (or n-type) video mask 11 It is possible to detect over a range so that the rotation speed control signal can be detected even if it is not near the predetermined rotation speed as in the method of FIG.

분주기(13)에 의하여

분주된 비교기(8)에 공급되어 여기서 회전수제어신호 검출회로(12)에서 검출된 회전수제어신호와 위상비교되어 그 위상차에 따라서 모터(10)의 회전수를 제어한다. 이로 인하여 비데오디스크(11)는 p방식(또는 n방식) 일지라도 n방식 (또는 p방식)과 똑같은 수평주사주파수로 부터 재생되도록 소성의 회전수로 제어될 수 있다.On the other hand, from the reference signal generator 9

By divider (13)

It is supplied to the divided comparator 8 and compared with the rotation speed control signal detected by the rotation speed control signal detection circuit 12 here, and controls the rotation speed of the motor 10 according to the phase difference. Due to this, the video disc 11 can be controlled by the number of revolutions of firing so that the video disc 11 can be reproduced from the same horizontal scanning frequency as the n type (or p type) even if it is the p type (or n type).

Furthermore, in the above embodiment, N has the same value in any of the p method and the n method. In addition, the reason why the rotational control signal of an integer number of the horizontal scanning frequency f _Hn (or f _Hp ) is obtained is that it is likely to be a case of low frequency due to mechanical response of the rotary servo.

Next, a second embodiment of the present invention will be described. In this embodiment, a video mask recorded by the same means as in the first embodiment is reproduced so that the rotation speed control signal is periodically reproduced five times in five times in one frame period. . In the n method, the number of scanning lines is 525, and in the p method, the number of scanning lines is 625. Therefore, the common factors of the two are taken into consideration so that the division ratio is an integer.

When detecting five revolution control signals in one frame period, one revolution control signal is recorded for every 105 (= 525/5) scan lines in the n method, and 125 (= 625/5) signals in the p method. Per scanline. One rotational speed control signal is recorded. Similarly, when detecting 25 revolution control signals in one frame period, one revolution control signal is recorded for every 21 scan lines in the n method and every 25 scan lines in the p method.

Therefore, in the present embodiment, instead of the third frequency divider 13, the frequency divider 14 and 15 and the switching switch 16 are respectively configured, and five (or 25) pieces are provided in one frame period. In the case of D _P during video mask reproduction in which the rotation speed control signal is periodically recorded, the division ratio of the frequency divider 14 is set to 1/125 (or 1/25), and its output is changed through the switching switch 16. On the other hand, in the case of D _n , the frequency division ratio of the frequency divider 15 is set to 1/105 (or 1/21), and its output is supplied to the comparator 8 through the changeover switch 16. Thus, D _p and D _n can be reproduced with compatibility.

4 shows a block diagram of a third embodiment of the present invention. In Fig. 2, the same components as those in Fig. 2 are denoted by the same reference numerals and description thereof will be omitted. This embodiment is most suitable for a CAV video disk, and a CAV video disk is recorded differently from that of a CLV video, so that the synchronization signal is recorded in the centrifugal direction of the video disc. For example, in a CAV type video mask in which four field color image signals are recorded every revolution, the vertical synchronization signal is recorded in the centrifugal direction at the positions indicated by 23 ₁ to 23 ₄ in FIG. Therefore, the regeneration horizontal frequency can be set to a predetermined value by controlling the rotation frequency of the rotating shaft of the rotating motor of such a video mask.

That is, in Fig. 4, the central gear is penetrated and fixed to the rotary shaft of the motor 10 for rotating the CAV video disk 17, and the disk-shaped gear 18 composed of a magnet which rotates integrally with the rotary shaft of the motor 10. ) And the magnetic detector 19 detect the rotation speed of the motor 10. The gear 18 is periodically formed with an acid at a circumferentially equal position, and one pulse is withdrawn from the magnetic detector 19 whenever the acid passes in front of the magnetic detector 19. Further, as a means for detecting the number of rotations of the motor 10, a small hole is provided on a circle of a disk that is integrally rotated with the motor 10, and detected by the short and long periods of light passing through the small hole. Various known means can be used in place of the gear 18 and the magnetic detector 19, of course.

The rotation speed of the motor 10 is 900 rpm in D _n and 150 rpm in D _P when the video disk 17 has recorded a video signal of four fields per revolution as shown in FIG. On the other hand, the number of scanning lines recorded per revolution is 1050 in D _n and 1250 in D _p , and the number divided by quantum common is 20, 5, 10, 25, 50 (except 1). Therefore, when the number of peaks of the gear 18 is selected from any of the above five types, the number of pulses output from the magnetic detector 19 per one rotation of the rotating shaft of the motor 10 and the scan per pulse The relationship between the player, the playback device, and the video disc being played is as shown in the following table.

As can be seen from the above table, the scanning player per output pulse of the magnetic detector 10 is determined by the application of the video disk to be reproduced D _n or D _p despite the manner of the playback apparatus. Therefore, as shown in FIG. 4, the divider 20 and 21 are provided in parallel on the output side of the reference signal generator 99 so that the divider ratio of the divider 20 is reproduced at the time of playing the n-type video disc D _n. It is set to one value such that the output pulse of (19) is equal to the repetition frequency (for example, when the number of mountains of the gear 18 is 50, the division ratio of the frequency divider 20 is 1/21). The frequency division ratio of one frequency divider 21 is set to a value equal to the repetition frequency of the output pulses of the magnetic detector 19 at the time of reproduction of the p-type video disk D _p . (For example, when the number of mountains of the gear 18 is 50, the division ratio of the divider 21 is 1/25.) Therefore, when the reproduced video disc 17 is D _n , the divider 20 ) the number of revolutions of the motor 10 by switching the change-over switch manually or automatically so that the output is the output of when the addition D _p to be fed to the comparator (8) the dispenser 21 is supplied to the comparator 8 of the video disc The reproduction horizontal scanning frequency from (17) is controlled so that the horizontal scanning frequency predetermined in the reproducing apparatus becomes the horizontal scanning frequency predetermined in the reproducing apparatus. Therefore, even when the playback device is P _n (or P _n ), the video mask D _p (or D _n ) can be played back.

Moreover, in general, the larger the number of mountains of the gear 18 is, the higher the rotational speed control capability becomes, but it is difficult in work. However, 50 in the rightmost column of the table is most suitable in terms of performance and work, and is optimal for the present invention. In the case of recording a two-field color video signal every one revolution in the CAV method, the number of mountains of the gear 18 is 5 and 25. The frequency division ratios of the frequency dividers 20 and 21 are set to 1/105, 1/125, and 1/21 for 25 and 1/21 and 1/25 for 25, respectively. According to this embodiment, it is possible to quickly control the predetermined speed even without picking up and playing the video disc 17 by the playback element by detecting the rotation speed of the video 10 as the rotation speed of the video mask. Furthermore, in the present embodiment, the same circuit as that of the second embodiment, but the reference signal generator 9, the divider 20, and 21, may be constituted by two kinds of oscillators generating a predetermined repetitive frequency.

Next, a fourth embodiment of the present invention method will be described.

·f_Hp로 되어 비데오디스크 D_n의 반송색신호의 색부반송파주파수 f_Cn은

·f_Hn으로 된다(예를 들면

은 162.5로 선정됨).According to the present embodiment, the luminance signal and the carrier color signal are frequency-interleaved in the video disc recording / reproducing method in which a carrier wave is modulated and the signal is recorded and reproduced after multiplexing the luminance signal and the carrier color signal. Therefore, the color carrier frequency f _c of the carrier color signal is selected as an odd multiple of 1/2 of the horizontal scanning frequency, and the odd multiple of 1/2 is equal to the video disk D _p of the p type and the video disk D _n of the n type. Select, record and play back. Therefore, the color carrier frequency f _Cp of the carrier color signal of the video disc D _p is

F _Hp , and the color carrier frequency f _Cn of the carrier color signal of the video disc D _n is

F _Hn (e.g.

Is chosen as 162.5).

·f_Hp가 아니고

·f_Hn가 되어 재생장치 P_n으로 되어 재생할 수 있는 n방식의 반송색신호와 등기가 되어 재생장치 P_n에 의해서 반송색신호는 n방식의 반송색신호와 같은 주파수로 재생될 수 있으므로 재생장치 P_n내의 색신호 처리회로는 하등 손을 가할 필요가 없다. 이상의 것은 비데오디스크 D_n을 재생장치 P_p로 재생했을 때도 똑같으며, 재생장치 p_p에 의해서 반송색신호는 p방식의 반송색신호와 같은 주파수로 재생된다.When the video disc D _p recorded as described above is reproduced by the playback device P _p and when the video disc D _n is reproduced by the playback device P _n , the reproduction horizontal frequency and the color carrier frequency of the carrier color signal are different. The playback devices P _p and P _n each have a standard playback circuit. In this case, when D _p is reproduced by the reproducing apparatus P _n , the rotation speed control can be performed according to the first to third embodiments so that the recording level equalizer signal is reproduced by f _Hn instead of f _Hp . The carrier color signal has a color carrier frequency

Not f _Hp

· F is the _Hn and reproducing apparatus is in P _n become of the n-way conveying color signal and the registration can be played and reproducing apparatus by the P _n conveying color signal because it is subject to play with the same frequency as the conveying color signals of the n method and reproducing apparatus in the P _n The color signal processing circuit does not need to be applied at all. The same applies to the above when the video disc D _n is reproduced by the reproduction device P _p . The reproduction color signal is reproduced at the same frequency as the p-color carrier color signal by the reproduction device p _p .

6 shows a block diagram according to the fourth embodiment of the present invention. In Fig. 2, the same components as those in Fig. 2 are given the same reference numerals, and the description thereof is omitted.

·f_Hp(또는

·f_Hn)로 되어 휘도신호에 다중회되어 그것이 반송파를, 예를 들면 주파수변조하여 얻은 신호가 기록되어 있는 비데오디스크로 단자(35)에서의 회전수제어를 위한 신호가 공급되는 모터(10)에 의해 소정의 회전수로 회전시키게 된다. FM 복조회로(25)에 의하여 복조되어 빼내어진 신호는 휘도신호와 반송색신호가 수평주사 주파수에 관해서 인터리브되도록 배치된 다중화 신호이어서 상기한 바와 같이 수평주사주파수 및 색부반송주파수는 재생장치로 원래 재생하는 TV 방식의 것과 동일주파수로 되어 있어 이 때문에 분리회로(26)를 구성하는 1H 지연선(27)을 통했을 경우에는 D_n, D_p의 어느 것인가의 비데오디스크를 재생한 경우라 할지라도 공용할 수 있다. 1H 지연선은 높은 정도의 것이며 n 방식과 p 방식과로 수평주사주파수가 겨우 0.7% 상이박에 없이도 공용하는 것은 불가능하지만, 본 실시예에 의하면 상기한 이유로 1H 지연선을 공용할 수가 있다.In FIG. 6, the disc 24 has a color carrier frequency of a carrier color signal.

F _Hp (or

· F _Hn) are multiplexed once with the luminance signal for it to the carrier, for the motor (10 a signal is supplied to the rotation number control in a video disc which is recorded a signal obtained by such frequency modulation terminal 35 in) It rotates by a predetermined rotation speed by. The signal demodulated and extracted by the FM demodulation circuit 25 is a multiplexed signal arranged such that the luminance signal and the carrier color signal are interleaved with respect to the horizontal scan frequency. As described above, the horizontal scan frequency and the color part carrier frequency are originally reproduced by the reproducing apparatus. It is the same frequency as that of the TV system. Therefore, when the video signal of any of D _n and D _p is played back when the 1H delay line 27 constituting the separation circuit 26 is used. can do. The 1H delay line is of high degree and it is impossible to share the horizontal scanning frequency without only 0.7% difference between the n and p methods, but according to the present embodiment, the 1H delay line can be shared.

The luminance signal is subtracted by adding the input and output of the delay line 27 to the adder 28, while the carrier color signal is subtracted by subtracting the output from the input of the 1H delay line 27 to the subtractor 29. In this case, the carrier color signal is a signal obtained by modulating the color carrier frequency with two color difference signals rather than being modulated by a predetermined modulation type defined by the NTSC method, the PAL method, or the SECAM method as described above. Accordingly, the carrier color signal extracted from the subtractor 29 is converted into a suitable carrier color signal of a predetermined TV system by the TV system converter 30, and then supplied to the adder 31 where it is multiplexed with the reproduction luminance signal from the adder 28. Then, it becomes a standard color video signal of a predetermined TV system and is output from the output terminal 32 to the monitor TV receiver. Therefore, in the present embodiment, video disc reproducing apparatus for inde two sets of the n method and p way is to present the NTSC method, PAL method, three types of SECAM system would play the video disk D _p to the reproducing apparatus of the SECAM system In this case, a regular standard color image signal satisfying the SECAM standard is output.

If the video disc D _n is played with this SECAM playback device, the horizontal scan frequency is the same as the SECAM method, but the field frequency is only 59.5 Hz, which is about 20% higher than the normal frequency of 50 Hz. The TV receiver can be synchronized with this.

Furthermore, since the carrier color signal is output exactly the same as the SECAM method, it can be received without any problem. The PAL type playback device and the NTSC type playback device can also play back two types of video discs without any problems. However, in the middle of a video disc, an appropriate track estimation control signal is inserted between each track or track so that the playback element is accurately estimated and scanned on the track, and the track is estimated by the playback element. There is a control to scan. For example, in the video disc proposed by the present applicant, the first and second tracking control reference signals (called tracking signals) f _T1 and f _T2 of frequencies different from each other at a lower frequency than the band of the carrier of the video signal are rotated one disc each. A boot rack is formed in the middle part between recording tracks which are switched at intervals and adjacent to each other on a burst, and the switching connection part of f _T1 and f _T2 (four vertical voorings when four fields are recorded per revolution) The third tracking signal f _T3 for switching the tracking polarity of the tracking servo circuit on the video signal recording track adjacent to the video signal recording track) is recorded at a low level below a predetermined level so as not to affect the video signal reproduction. have.

In the method of the present invention, the tracking signal selects each frequency of f _T1 , f _T2 , f _T3 as a real multiple of the horizontal scan frequency f _Hp or f _Hn . In this case, it is not particularly necessary to select an integer multiple of f _Hp and f _Hn or an odd multiple of 1/2. This is because these tracking signals f _T1 , f _T2 , f _T3 and the like can be used with appropriate band filters to separate them from each other.

However, it is desirable to select an odd multiple of f _Hp and f _Hn , if possible, since it is necessary to take into account the video signal of the video disc reproducing apparatus to be mixed with the main video signal and generate bits. By selecting these frequencies, any of D _{n and} D _p is played back at the horizontal scanning frequency determined by the playback devices p _n and p _n , so that the frequency of the tracking signal is also played back at the frequencies specified by the playback devices p _n and p _n . Therefore, it is not necessary to switch the tracking signal discrimination circuit if the types of video discs are different.

In addition, according to the present invention, even if the video disc of any of D _n and D _p is reproduced, the rotation speed of the video disc is reproduced so that a predetermined horizontal scanning frequency f _Hn or f _Hp of the video disc to be reproduced is reproduced. If an information signal other than the video signal is recorded on the video disc, the information signal is recorded at a random frequency of the horizontal scanning frequency f _Hn or f _Hp but with a real multiple of the same value. Therefore, even if the video disc to be played back by the playback device is either D _n or D _p , a circuit for selecting the frequency of the information signal can be shared. That is, as the above information, in addition to the above-mentioned tracking signal, it is standard as a pulse code modulation (PCM) signal such as a track number, a program number, or a time for the purpose of displaying the first tracking number or performing an arbitrary program. There is a PCM signal inserted and recorded in the vertical blanking period of the video signal. Second, there is an audio signal accompanying the standard video signal.

Since the clock frequency of the PCM signal is multiplied by the same real number as the frequency of the horizontal registration signal recorded on the video disc, the PCM signal reproduction circuit can be shared. Furthermore, considering clock reproduction, an integer multiple is more preferable than a real multiple, but in the clock magnetic reproduction type (e.g., bi-phase modulation), any real multiple does not interfere.

Alternatively, the above audio signal is used for monophonic or stereophonic or Barringer audio, and one or two appropriate subcarriers are installed to modulate FM, AM, PM, etc. Video signal) and then modulating a separate carrier with this, and recording it on a video disc.However, the subcarrier frequency for the voice carrier is multiplied by the same real multiple of the frequency f _Hn and f _Hp of the horizontal registration signal recorded on the video disc. Select. In consideration of bit interference and the like, an odd multiple of 1/2 of f _Hn and f _Hp is preferable. Even in this case, since either of D _n and D _p is reproduced at the same frequency, a band filter for voice carrier discrimination can be shared.

Furthermore, the modulation of the carrier wave with a standard video signal can be recorded by multiplexing the audio subcarriers, and the audio subcarriers may be selected at the same real multiple of f _Hn and f _Hp .

In particular, when a carrier with FM as a standard video signal is recorded on a video disc, the frequency corresponding to the bedestal level of the video signal of the carrier and / or the frequency corresponding to the leading signal leading level is the horizontal scanning frequency f _Hn of the standard video signal. Alternatively, by selecting the real multiple of f _Hp and the real multiple of D _n and D _p , the same frequency can be reproduced at the predetermined frequencies of the video disc reproducing apparatuses p _n and p _p as described above. If the frequency is not selected as described above, the Bethesal level and the synchronization signal leading level are changed by the video disk to be played back, resulting in the storage of the DC signal of the video signal. In addition, the frequency of the Bethestal level or the sync signal leading level is better than the real number of f _Hn and f _Hp . However, the Bethesal level or the sync signal leading level is the half of f _Hn and f _Hp because the energy level of the FM signal is relatively high. It is advisable to choose odd numbers.

Although the above embodiment relates only to a video disc, a description will be given of a method in which the following audio signal can be converted into a PCM and reproduced together with a rotating record carrier (hereinafter referred to as an audio disc) recorded by a change in geometry on the record carrier. do.

According to the present invention of the CAV method as described in each of the above embodiments, the playback apparatus is reproduced according to the video disks Dn and Dp so that the horizontal scanning frequency to be reproduced can be reproduced in the same manner as the horizontal scanning frequency determined by the playback apparatus. It should be comprised so that the rotation speed of a predetermined rotation speed range may be obtained. Thus, the present embodiment generates a frequency close to f _Hn and f _Hp by using the frequency of the original oscillator for generating the clock frequency or clock frequency of the PCM of the audio disc, and this is referred to as the reference signal generator 9 of the fourth illustration. By using instead of the output reference signal, the same configuration as in FIG. 4 can be controlled to rotate at the number of revolutions if the required number of revolutions of the audio disc is within the above range. The reproduced PCM signal is output at the set clock frequency. do. Therefore, the video disc player can be used as an audio disc player simply by imposing a simple adapter.

(N, M은 정수)배로 선정해 두고 더욱 상기의 f_Hn, f_Hp또는 그들에 가까운 주파수를 제4도시의 기준신호 대신에 사용하므로써 소기의 데이터율 또는 클럭주파수의 재생신호를 얻을 수가 있어 이와 같은 어댑터와 같은 것을 사용하므로써 재생장치는 Pn, Pp의 어느 것이던 동일의 회전수가 얻어진다.As such, the data frequency or clock frequency of the PCM signal recorded on the audio disc is determined by f _Hp , f _HP or

By selecting (N and M are integers) times, and using the above-mentioned f _Hn , f _Hp or a frequency close to them instead of the reference signal shown in Fig. 4, a reproducing signal of a desired data rate or clock frequency can be obtained. By using the same adapter and the same adapter, the playback apparatus obtains the same rotational speed of either Pn or Pp.

Furthermore, in the present embodiment, the above-described adapters may be combined separately from the main body of the reproducing apparatus or integrated into the reproducing apparatus.

7 shows a block diagram of another embodiment of the decoration of the present invention, which is also used as an audio disc player.

In Fig. 3, the same components as those in Fig. 3 are denoted by the same reference numerals and description thereof is omitted. The disc 34 is an audio disc or a video disc on which rotational speed control signals are recorded. When the audio disc is reproduced, the switching switches 35 and 43 are connected to the adapter 42 shaft, respectively. In audio discs, the time-division multiplexed signal of the PCM signal and the PCM-synchronized synchronization signal is recorded at every period of f _Hp , f _Hn or an integer thereof. Therefore, the data rate of the entire PCM signal is naturally f _Hn , f _Hp. An integer multiple of the integral of). The reproduction signal is supplied to the synchronization signal detector 36, the clock reproduction circuit 36 and the data processor circuit 40 in the adapter 42, respectively.

의 분주기(38)를 통해서 얻은 동기신호와 동등한 주파수의 신호와 비교되어 이것에 의해서 오디오디스크는 소기의 클럭주파수의 PCM 신호가 재생되도록 회전수 제어된다.The synchronous signal detected by the synchronous signal detector 36 is detected and its output is supplied to the comparator 8 through the switching switch 35, where the output signal of the original oscillator 37 is divided.

Compared with a signal having a frequency equal to that of the synchronization signal obtained through the divider 38, the audio disc is rotated so that the PCM signal of the desired clock frequency is reproduced.

As a result, the PCM signal is demodulated by a known method by the clock reproducing circuit 39 and the data processing circuit 40 to which the respective outputs of the synchronization signal detector 36 and the original oscillator 37 are supplied, thereby outputting a regular audio signal. It is output from the terminal 41.

배(단, n은 각 표준텔레비젼방식간에 있어서 동일의정수)의 색부반송파 주파수의 반송색신호와를 다중화한 신호로 반송파를 변조한 실호를 기록하고, 이것을 재생수평주사 주파수가 항상 소정의 주파수로 재생할 수 있는 회전수제어를 행하여 재생했기 때문에 휘도신호 및 반송색신호는 재생장치에 적합한 소정의 주파수로 재생할 수가 있다. 따라서 재생장치내의 색신호처리회로나 휘도신호와 반송색신호의 분리용 1H 지연선을 여하한 수평주사주파수의 칼라영상신호가 기록되어 있는 회전기록매체를 재생할 경우도 공용할 수 있으며, 더욱 상기 표준영상신호에 다중화된 다른 정보신호(예를 들면 트래킹신호, 트랙번호나 프로그램 번호나 시각등의 PCM 신호, 영상신호에 부대하는 음성신호로 변조된 방송파둥)의 주파수를 기록되는 표준영상신호의 수평주사주파수의 m배(단, m은 각 표준텔레비젼 방시간에 있어서 동일의 실수)로 선정하였기 때문에 상기 다른 정보신호를 상이한 텔레비젼방식의 영상신호 재생시에도 항상 소정의 텔레비젼방식의 다른 정보신호의 동일의 주파수로 재생될 수 있다. 따라서 이 다른 정보신호판별회로를 절환함이 없이 공용할 수 있으며, 또 영상신호의 베데스텔레벨의 주파수 및/또는 동기신호선달레벨의 주파수를 상기 수평주사주파수의 m배로 선정했기 때문에 상이한 텔레비젼방식의 영상신호 재생시에도 최적한 모니터화상을 얻을 수가 있고, 또 더욱 음성신호를 PCM화하여 회전기록매체에 기록할때 PCM의 클럭주파수 또는 데이터율을 상기 수평주파수의

배(N, M은 정수)로 선정하던가, 또는 PCM신호의 가운데에 상기 수평주사주파수 혹은 그 정수분의 1의 주기마다에 PCM화된 동기신호를 기록하고, 재생시에 별도로 생성된 기준신호와 회전기록매체의 회전검출펄스 또는 상기 동기신호와 비교해서 얻어진 신호로 회전기록매체의 회전수를 제어토록 하였기 때문에 영상신호가 기록되어 있는 회전기록매체를 재생하는 장치를 간단한 어댑터를 부가하는 것으로 음성신호가 기록되어 있는 회전기록매체를 재생하는 장치로 공용할 수가 있는 등의 여러가지 특징을 가진 것이다.As described above, the recording and reproducing method of the rotating recording medium of the present invention is a horizontal synchronizing signal having a frequency other than the predetermined frequency by an apparatus for reproducing a rotating recording medium on which a video signal having a horizontal synchronizing signal of a predetermined frequency is recorded. In order to reproduce the recorded video signal of the rotating recording medium by controlling the number of rotations of the rotating recording medium so that the reproduction frequency of the horizontal synchronous signal is equal to the predetermined frequency from the rotating recording medium having the video signal recorded thereon. The recording medium reproducing apparatus can reproduce a rotating recording medium on which a standard video signal of a television method is recorded, which is different from the standard video signal of a television system to be reproduced, so that any change can be made to a television receiver suitable for the current television system. Different TV rooms with compatibility that is practically practical and needless Standard video signal can be reproduced from a rotating recording medium, and a signal having a horizontal scanning frequency of the standard video signal recorded on the rotating recording medium or a frequency equal to an integer thereof or one frame period of the recorded standard video signal Reproducing horizontal scanning frequency in order to record a signal having a predetermined coefficient associated with each scanning line of each television system as a rotation speed control signal, detect it from a reproduction signal, compare it with a reference signal, and control the rotation speed of the rotation recording medium with the signal. Rotation speed control is always accurate to reproduce at a predetermined frequency, and the rotation speed is controlled by a signal obtained by detecting the rotation speed of the rotating shaft of the motor rotating the rotation recording medium and comparing it with the reference signal. It is suitable for rotating recording media of CAV type, and it is suitable for brightness signal and horizontal scanning frequency.

(N is the same integer between each standard television system.) A real signal modulated by a carrier is multiplied by a signal multiplexed with a carrier color signal of a color subcarrier frequency, and the reproduction horizontal scanning frequency is always reproduced at a predetermined frequency. Since the reproduction is carried out by controlling the number of rotations, the luminance signal and the carrier color signal can be reproduced at a predetermined frequency suitable for the reproducing apparatus. Therefore, it is also possible to share a color signal processing circuit in a reproducing apparatus or a rotating recording medium on which a color image signal having a horizontal scanning frequency is recorded using a 1H delay line for separating the luminance signal and the carrier color signal. Horizontal scan frequency of standard video signals recorded with the frequency of other information signals (e.g., tracking signals, PCM signals such as track numbers, program numbers or times, and broadcast waves modulated with audio signals accompanying video signals) M, where m is the same real number for each standard television time, so that the other information signal is always set to the same frequency of other information signals of Can be recycled. Therefore, this other information signal discrimination circuit can be shared without switching, and because the frequency of the Bethestel level and / or the sync signal delivery level of the video signal is selected as m times the horizontal scanning frequency, Even when the video signal is reproduced, an optimal monitor image can be obtained, and when the audio signal is converted into a PCM and recorded on a rotating recording medium, the clock frequency or data rate of the PCM

Or (N, M is an integer) or the PCM-synchronized signal is recorded in the center of the PCM signal at the horizontal scanning frequency or every one period of the integer, and the reference signal and the rotation recording separately generated at the time of reproduction are recorded. Since the rotation speed of the rotating recording medium is controlled by the rotation detection pulse of the medium or a signal obtained by comparing with the synchronous signal, an audio signal is recorded by adding a simple adapter to a device for reproducing the rotating recording medium on which video signals are recorded. The present invention has various features such as being used as a device for reproducing a rotating recording medium.

Claims (1)

A first rotation recording medium in which one of the plurality of standard television system information signals each having a horizontal synchronization signal of a predetermined frequency is recorded in an isoline speed method, and an information signal of a method other than the scheduled one method is originally recorded. In the combination of the reproducing apparatus and the rotating recording medium, which reproduces the recording signal recorded on any of the rotating recording mediums of the second rotating recording medium, the first and second rotating recording mediums have a horizontal scanning frequency.

A carrier modulated signal of multiplex carrier color signals and luminance signals of the multiplex carrier (2n-1) (where n is the same integer between TV systems), and a reproduction operation is performed during reproduction. The rotational recording medium is controlled by controlling the number of rotations of the first or second rotating recording medium in the reproducing operation so that the horizontal scanning frequency reproduced on the first or second rotating recording medium is equal to the horizontal scanning frequency of the original method of the reproducing apparatus. And a reproduction recording method of a rotating recording medium.

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