JPS601649A - Recording disk of information signal - Google Patents

Abstract

PURPOSE:To secure the interchangeability between analog and digital disks by performing recording with mixture of analog and digital recording tracks and at the same time recording the frequency of the digital signal with no synchronism secured with a video signal. CONSTITUTION:The synchronizing signals are supplied to VTR1 and 2 from PCM recording/reproducing devices 3 and 4, and these VTR1 and 2 supply the reproduction signals to reproducers 3 and 4. The digital signals having the sampling frequency 44 having 100kHz and 16 quantization bits and extracted from reproducers 3 and 4 are supplied to a digital signal processing circuit 6 which is controlled by a controller 7. While the FM-modulated signal is delivered to a terminal 8a of a switch circuit 8 from the circuite 6. At the same time, a VTR9 supplies the reproduction signal given from a magnetic tape to an analog signal processing circuit 10 which is controlled by the controller 7. Then the FM-modulated signal is delivered to a terminal 8b from the circuit 10. As a result, both digital an analog recording tracks are mixed on the same side of a disk 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an information signal recording disc, and in particular to a track on which digital signals mainly containing audio information are recorded at a transmission frequency of 44.100 kHz, and a track on which a digital signal mainly containing audio information is recorded, and a composite video signal. I[Related to information signal recording disk].

PRIOR ART Conventionally, analog information signals such as composite video signals and audio signals have been subjected to frequency modulation (FM) and recorded on concentric solid or spiral racks, for example, with changes in geometrical shape. It is also known as an information signal recording disk (hereinafter referred to as "disk"). This disc is called a video disc because the recorded information is a composite video signal in the form of:lE, and the rack for recording is an analog information signal.
Composite video signals and the like are recorded in the form of modulated wave signals obtained by performing analog modulation that modulates the a-transmitted waves.

Note that on a video disk, for example, an address signal for random access is recorded during a specific period within the vertical line erasing period of a composite video signal, and the address signal is either a coded digital signal or a recorded signal. Since the main body of information is an analog-modulated composite video signal, etc., a track such as the recording rack 1 of this video disc will be hereinafter referred to as an "analog recording track" for convenience.

Conventionally, there are discs in which an audio signal or an audio signal and a video signal are respectively digitally modulated and then synthesized in a time-series manner and recorded on concentric or spiral tracks as, for example, changes in geometric shape. more widely known. The recorded information on this disc is mainly audio signals, and the video signals are mainly still images, which serve as auxiliary information to help the imagination of the listener of the audio signals. It is called a disk. In recordings 1 to 5 of this digital audio disc, information signals such as audio signals are digitally modulated, converted into digital signal format, frequency modulated, etc., and recorded (in this specification I, this digital audio For convenience, a track such as a recording track on a disk will be referred to as a "digital recording track" hereinafter.

).

By the way, as proposed by the present applicant, in the above-mentioned video disc, previously recorded signals are reproduced by detecting changes in capacitance formed between the electrode on the scanning side and the disc, and information signals are also recorded. Tracking control reference signals of different frequencies are recorded on both sides of the track (analog recorder, rack)43, and tracking control is performed by comparing the reference signal levels during playback (43). On the other hand, some of the above-mentioned digital audio disks are equipped with tracking control in the same way as the above-mentioned capacitance change reading type video disks, as proposed by the applicant. It is known that there is a capacitance change readable digital audio disc without internal grooves in which reference signals for use are recorded on both sides of an information signal recording track (digital recording mill rack). It is rotated at the same rotation speed as a capacitance change reading type video disk during playback, the frequency of the reference signal for tracking control and the method of playback are the same, and changes in capacitance are detected. Point b, which is the configuration where the CC recorded low signal is read, is the same.

Therefore, even when this digital audio disc is played back using a video disc playback device, the scanning side is allowed to perform the normal tracking operation in the same way as the video disk playback port L, and the previously recorded signal is read from the scanning side. The pickup can be played back, and the original audio signal etc. can be demodulated by supplying the playback signal to the adapter. - Therefore, C1 The capacitance change reading type video disc and the capacitance change reading type digital audio disc proposed by the applicant mentioned above both share the same capacitance change reading type video disc playback device. -C playback is possible, and the above-mentioned digital audio disc and video disc have a feature that they can be played back in a so-called compatible manner.

Problems to be Solved by the Invention However, the digital audio disc and video disc described above are separate and independent discs, and the compatibility described above cannot be said to be compatibility in the strict sense. . On the other hand, compared to video discs, the pre-recorded signals on digital audio discs are digital signals, and the special features of digital signal transmission are that audio signals, which have a wide dynamic range, can be reproduced with extremely high fidelity, and still images can also be reproduced with extremely high fidelity. It is extremely bright, and of course has the advantage that the audio signal is reproduced in ultra-high fidelity together with the still image reproduction image. On the other hand, when playing still images, video discs generally mute the audio signal in order to repeatedly play the same track, and unlike digital audio discs, still images and sound cannot be played at the same time. Since it is an analog signal transmission, it is necessary to transmit information signals in a band of about several Mf-1z in real time, and in order to increase the separation of information, it is necessary to transmit information signals in a band of about 1-1 in tens of times. It has the advantage of being able to play moving images together with audio signals, compared to the idicle audio discs, which transmit signals. Therefore, in order to optimally reproduce recorded information,
It is desirable to select and record either a digital signal or an analog signal depending on the information content.

Therefore, the present invention uses a simple C+F4 recording system to connect analog recording 1 to rack and digital recording 1 according to the recorded information content.
- The above video discs and digital A-diodes will be recorded by mixing racks, etc., and the digital signal transmission frequency will always be /14.100kHz without synchronization with the video signal. The object of the present invention is to provide an information signal recording disk (disc) that can maximize the advantages of each disk and thereby allow compatible reproduction in a complete sense.

Means for Solving the Problems The present invention provides analog modulation of a composite video signal with an information signal containing at least b, so that one modulated wave signal is recorded at a rate of N fields per revolution (N is a natural number). At least an open signal, an error correction code, and an error check code are added to the digital data of multiple V channels obtained by digitally modulating the analog recording MIRAC with the information signal and forming one block, and each block is 44.100 kHz
The digital signal synthesized in time series at the transmission frequency is further modulated and recorded without synchronization with the composite video signal. By referring to the structure, the above problems are solved, and one embodiment thereof will be explained below with reference to the drawings.

Embodiment FIG. 1 shows a block system diagram of a recording system of an embodiment of a disk according to the present invention. In the same figure, 1 and 2 are 2㎜A7, respectively.
In a channel VTR, a synchronizing signal is supplied from the F) CM recording and reproducing machine 3, 71, while two channels of audio signals are pre-recorded on the magnetic tape, or one channel is an audio signal and the other channel is an audio signal. An audio signal or a still image signal, or a still image signal for both the two V channels, are respectively reproduced and supplied to PCM recording/reproduction channels 3 and 4, where they are recorded. Note that the above still image signal has 62 scanning lines as an example.
j) Encoded data is sequentially inserted into the video period of the composite synchronization signal conforming to the NTSC system. It is said that the signal format is

1) The CM recording and reproducing machines 3 and 4 convert the input signals into PCM
(pulse code modulation), generates an error check code and an error correction code, and records the PCM signal consisting of these codes along with horizontal and vertical synchronization signals on a magnetic tape, and reproduces the same. - As an example, these PCM recording/reproducing machines 3 and 4 record 6 information words (3 words each for both left and right channels) during one horizontal scanning period (1)-1), and record 3 information words in 1 frame.
Since there is a data pause 1111 between 51-1 and -C, the sampling frequency [S is 3xf HX (525-35
)/525. Here, f)1 is the horizontal scanning frequency, and the PCM recording/reproducing devices 3 and 4 are oscillators 5
Since it is operated in synchronization with 15.75 kHz, by substituting 15.75'k)Iz into f+ in the above equation, the sampling frequency [S becomes 44.1001 (Hz).

In this way, the digital signals of the 1i14-channel with a sampling frequency of 44.100 kl-IZ and a quantization bit count of 16 bits extracted from the PCM recording/reproducing devices 3 and 4 are respectively supplied to the digital signal processing circuit 6. be done. Under the control of the output of the controller 7, this digital signal processing circuit 6 generates one block of signals in the signal format shown in FIG.
Synthesized in time series at a transmission frequency of 100 kl-1z,
Furthermore, a frequency modulated wave signal obtained by frequency modulating (FM) a carrier wave of, for example, about 7 MHz using this synthesized digital signal is outputted to a terminal 8a of the switch circuit 8. FIG. 3 shows an example of the frequency spectrum of the frequency modulated wave signal (first FM signal) supplied from the digital signal processing circuit 6 to the terminal 8a of the switch circuit 8. 7.6M1-12, the data does not show 5.8M1-1z at rOJ. In addition, in the same figure, it is indicated by a broken line. lfρ+, fp2 and fP3 are recording device 11 which will be described later.
Each frequency spectrum I~ of the reference signal stations fp+, fP2 and [P3 recorded together with the first F IVI signal within
Show me the ram.

Here, as shown in Figure 2? In the I-1 block signal C,
S does not indicate the start of a block, and is 8-pixel (accepts the placement position of the synchronization signal with a fixed pattern of -. cl) -1°Ch-2,
Ch-3 and Ch-4 each indicate the arrangement position of one word of a 16-bit digital signal.

This digital number 18 is audio number 18 (A-DJ
The digital audio sub signal or video signal is sent to the pulse code control modulation (PCM) L-C19 (PCtvl).
There is a digital video signal that is L/'(('',). For example, if one word of the digital audio signal of each of the four A7 channels is placed in C11-1 to C11-4, and -1'-CI+ -3 places one word of the digital audio signal of each of the 3 channels and 7 channels of the digital audio signal, and C11-4 stores the digital video signal, for example, the quantization number 8 bits 1 to 1. When arranging two pixel data, ■ch-1 and C1+
17 channels of the first two-channel stereo digital audio signal are placed in C11-3 and C11-4, and each channel of the second two-channel stereo digital audio signal is placed in C11-3 and C11-4. When placing data, ■ 2 channels 1 to C11-1 and Ch-2
There are cases in which each channel data of a 7-channel digital audio signal is arranged, and 8-bit quantized pixel data of the same or different digital video signals is arranged in C11-3 and Ch-4.

P and Q shown in Figure 2 are each 5 bits of 16 bits]
For example, p=w+■W2■W3■WI (1) Q=74 ・W1■1-3 ・W2■−``2 ・W3■
.

T-Wlt (2) This is a signal generated by the formula. However, (1).

(2) In the formula, W+, 'vV21 W3, W4 are Ch-
Each of the 16-bit digital signals from 1 to CI+-4 (usually digital signals that go to very different blocks), Go is an auxiliary matrix of a predetermined polynomial, and ■ is the modulus of each corresponding pitch 1 to 2. Indicates addition.

Furthermore, in Figure 2, CRC is a 23-bit error detection code,
C11-1 to CI+ -4 arranged in the same block,
For example, each word of P and Q is expressed as X23+X50X'-1-
It is the 23-bit remainder obtained when divided by the generator polynomial X+1, and during playback, the signal from the 9th bit 1 to the 127th bit of the same block is divided by the generator polynomial "C".
When a bullet is removed and the resulting remainder is zero, it is used to detect errors.
In the figure, Δ(11·) indicates the multiplexing position of various control signals used for rank 11 address, etc.

This control signal distributes the data from each pin 1 and transmits one hit in one block. For example, the control signal is transmitted to each pin 1 by 196 blocks (CJ and the control signal is 196 bits 1). ).

Furthermore, U is 2 pits 1 for a reserve called a user's hit. One block of signals is composed of 130 hits i;=l from S to U (not shown in Figure 2), and the digital signal is transmitted in this block unit at the same frequency as the digital audio signal sampling frequency of 44.100 kHz. The images are combined and transmitted in chronological order.

The above 196-bit control signal consists of 49 bits 1-4.
It is a structure in which the address codes of seeds are synthesized in chronological order.
All of these four types of address codes have a signal format as shown in FIG. Figure 4 shows a5
Of the total 49 address codes, the first 24 bits are indicated by S, YNC (this is the same signal, and its value is 4).
Different depending on the species address code. The next 4 after the sync signal
Pitch 1-0, indicates the source mode indicating whether the unrecorded fa number is in any of the silk combinations listed above (■ to ■), and also includes a normal/stop mode discrimination signal indicating whether or not to stop playback. , 71 to the next 20 pits 1
-res data is arranged, and the last pit is a parity pit 1-.

If the above address data is a time address code, it indicates how far the position from 1 to rack on the disc where the ]-code is recorded is in the playback history when normal playback is performed from the recording start position of the disc. In the case of Chirebuta address code 1~, it indicates the number of music tracks recorded from the recording start position on the disc at the track position where the "-t" was recorded. This is data.

As will be described later, the NT'SC system color video No. 15 is recorded on the disc 12 at a rate of 4 fields per revolution, so the disc 12 has an f'E-minute of 899. i
(-1:59.94/'1.)
2942.94 per revolution (=44,100x 103
Blocks X (4159,94)) will be recorded and reproduced. Therefore, the 196 hit control signals mentioned above are recorded and reproduced about 15 times during one rotation of the disk.

d5, transmitting digital video signals related to still images
For example, when pixel data of a luminance signal has a sampling frequency of 9 MHz, quantization per pixel, and 8 pips, the pixel data of the luminance signal is changed to a sampling frequency of 88.2 kHz using a memory, and two types of color difference signals (R The pixel data of -Y) and (B-Y) are respectively sampled at a sampling frequency of 2.25MH2, and the number of quantization is 8 pixel per pixel.
2kl-IZ and one frame is transmitted in a signal format as shown in FIG.

In FIG. 5, one word consists of 16 bits 1~, and each pixel data for m quantization bits 1~8 bits 1 is placed in the upper 8 bits and lower 8 bits 1~ of 1 word, respectively.
Two pieces of pixel data are transmitted in one word.

In addition, Yl indicates a group of gi 572 luminance pixel data in the first vertical column at the far left of the screen, and each pixel data arranged in order from the top to the bottom of the screen is the upper 8 bits of the first word, In this order, the F-order 8 bits of 1 word, the upper 8 bits of the 2nd word, the lower 8 bits of the 2nd word, the upper 8 bits of the 3rd word 1-2, and the lower 8 bits 1 of the 286th word. Placed. Y2 indicates a group of 572 luminance pixel data in the second vertical column from the left end of the screen, Y3 indicates a total of 572 luminance pixel data groups in the third vertical column third from the left end of the screen, Similarly Yi (i is 1 to 456)
indicates a total of 572 luminance pixel data groups in the first vertical column from the left end of the screen, and each pixel data is the same as the pixel data 7.
! They are arranged in the same manner as lY + , and pixel data for one vertical column of 286 words is transmitted.

In addition, (RY)j is the 51572 pixel data group of the first digital color difference signal arranged vertically, third from the left end of the screen, and (B-Y)j is the pixel data group from 0 &, t to the left of the screen. 3
ii 572 pixel data groups of the second digital color difference signal arranged in the vertical direction, each of the 572 pixel data groups in the same column
The 72 pixel data are arranged in order from the top of the screen in the Fh direction.
Upper 8 bits of the word, lower 8 bits of the first word, 8 bits of the second word, 8 bits of the F position of the second word 1-, . The upper 8 bits of the 3rd word, ..., the lower 8 bits of the 286th word are arranged in this order, and one vertical column of pixel data is transmitted in 28G words (however, J
is 1 to 114).

In this J, the pixel data is transmitted in the vertical direction of the screen during the scanning t! This is to facilitate the 1lvl change 1β.

Further, as shown in FIG. 4, the component encoded signal is a digital luminance signal starting with YJ j-3.
pixel data groups (YJ j 3 , YJ j-2,
YJ j-1, YJ j) and two types of digital color difference signals @(R-Y)j and (B-Y)j, a total of six pixel data groups, are processed in one unit. The six pixel data groups constituting the same unit are separately transmitted to six columns of memory element groups constituting the memory circuit in the still image encoder, which will be described later.
And written to the same address.

The header signal is shown in FIG.
The word ``Iy5'' is placed at the initial position of each of the 684 pixel data groups, and is transmitted as a signal for causing the reproducing device to identify various information of the pixel data group immediately after it. The header signal Z of the header signal 1''1~l-l 684 consists of 6 words, which are in a common signal format 1~.

Returning to FIG. 1 again, the V-engine R9 reproduces a magnetic tape on which an NTSC color video signal related to a moving image is recorded together with an audio signal, and supplies the reproduced signal to the analog signal processing circuit 10. . The analog signal processing circuit 10 generates a frequency modulated wave signal having the same signal form as the video disc of the applicant's 12 proposals described above, and multiplexes various address signals within the vertical blanking period and outputs the multiplexed signal. do. The specific structure was disclosed by the applicant in a patent application filed in 1973.
Quad analog signal processing circuit 10 is well known as disclosed in No. 2-25262, etc., so detailed description thereof will be omitted.
is a band-limited luminance signal and low frequency change +9! A band-sharing multiplexed signal with the IIfJ color sending signal is generated, and furthermore, an A7 address signal Ac, a time address signal ΔT, and a 1st address signal AN are generated separately, and these are used in the vertical blanking period of the multiplexed signal. Each specific 1F-1 within
A predetermined carrier wave is frequency modulated (FM
)t, to come out. Here, address No. 15 Ac is an address signal that indicates the signal recording position on the disc in the order of the recording program, time address signal ΔT is an address signal that indicates the total normal playback time from the lead-in position, and an address signal that indicates the signal recording position. The number address signal AN is a reference signal fp3 for the disk-rotating source formed l~rack.
These address signals indicate the number of tracks from the lead-in position, starting from the recording position, and each of these address signals consists of 29 bits.

The frequency spectrum of the output signal of the analog signal processing circuit 10 is as shown in FIG. In the figure, ■ indicates the 2.3 MHz carrier shift frequency band of the frequency-modulated luminance signal, and fa corresponds to the sink depth.
, 4MHz frequency, [b corresponds to pedestal 6,
The frequency of 6Ml-IZ, fC indicates the frequency of 7,'1M1-12 corresponding to the white peak. Also II
L, IIU indicate the lower sideband and upper sideband of the frequency-modulated luminance signal, II[L, nlu are the lower sideband of the frequency-modulated audio signal FAI, a signal obtained by further frequency modulating f△2, Upper sideband is shown. IV is a two-channel frequency modulated audio signal f8l.

Carrier wave of f△2 3.43 Ml-1z, 3,73 Ml
-1z is shown.

Furthermore, in FIG. 6, ■ indicates the frequency band of a low-frequency converted carrier color signal obtained by low-frequency converting the carrier color signal in the reproduced signal of the VTR 9. In addition, the first sideband LtVIc, V generated by frequency modulating this low-pass conversion carrier color signal
lu te, mata second sideband ha VIL.

'MuT is shown respectively. In FIG. 6, the frequency spectrum indicated by a solid line indicates the frequency spectrum of the signal taken out from the analog signal processing circuit 10.

Note that the reference signal f p 3. will be described later. f P 2 and [(] 3 are located in the lower vacant frequency band of band VIL. Reference No. 13 fP, ~ fp 3, etc. The occupied bands of the information signals can be moved forward by the same scanning needle. This is because of the need to reproduce.

The switch circuit 8 (acceptance signal in FIG. 2 that enters the terminal 8a) is obtained by frequency modulating the carrier wave with a Δ-mat digital signal, and the first frequency spectrum as shown by the solid line in FIG. 3 is obtained. FM signal and the 6th signal coming into terminal 8 t+.
In the figure, the second F of the frequency spectrum as shown by the solid line
M (for selecting only one of the F and M signals under the control of the output signal of the controller 7 among the i signals) and outputs it to the recording device 11.

The recording device 11 is a known cutting device using a laser beam, and the output signal of the switch R8 is supplied as the first input signal, and the output signal of the switch R8 is supplied from the input terminal 13 to the cutting device 4, which is equal to one rotation period of the disc-shaped recording master. A burst-like first reference signal fp+ and a burst-like second reference signal fP2 are alternately supplied in time series during each field bright interval, and fpl.

A signal obtained by inserting the reference signal [P3] at the switching position of fp2 is supplied as the second input signal, and a signal obtained by multiplexing the first input signal and the reference signal N)3 among these two human input signals is the first input signal. The reference signal I)+ is converted into a modulated laser beam of
, fp2 is converted into a second modulated laser beam, and is focused on the photosensitive material on the disc-shaped recording master in the same manner with a gap of about 1/2 h rack pitch from each other. This recording master is subjected to a known development process, followed by a known bean-making process.
A disk 12 according to the present invention is manufactured which has a track pattern as shown in FIG. 7, which has an electrode function and has no guide groove formed therein.

In FIG. 7, the disk 12 is placed under a spiral track by a switch circuit 8J: an information signal consisting of a video signal, an audio signal, and an address signal is output as a frequency modulated wave signal (first FM signal, The second FM signal is sent back, and bits are intermittently formed and recorded according to the information content. In FIG. 7, 11 continuous spiral tracks are shown as solid lines. Among them, the tracks corresponding to each rotary valve of the disk 12 are shown as t'+, j2, t3, etc. Each track is a flat part. The information signal pins 1~ are formed, and 11
Guidance is not formed. - For each horizontal scanning period (11-1>), for each analog recording track, a first reference signal [1] is applied at a position corresponding to the recording horizontal blanking period on both sides in the longitudinal direction. 1 pip 1~
, forming the bits of the second reference signal fP2.

Then, at the intermediate position between the center lines of adjacent tracks, only one of the reference signals fp+ and fp2 from pitch 1 to a3 is formed, and for the track a3, the reference signal rPI, The side on which rP2 is recorded changes for each track. That is, in FIG. 7, the tracks 1 to 1 of the reference signal [Pl] are shown by broken lines, and the tracks of the reference signal [P2] are shown by dashed lines. vl.

V2+'V'3+... indicates the position of the vertical synchronization signal of each field. Also, rack j+, t2. [3°..., i.e., the positions vl, v5 . . . where the reference signals fp+ and fp2 switch, etc. y9. . . , the third reference signal fP3 is recorded for approximately 3H period, for example.

Further, one rotation period of the disk 12 is equal to, for example, four field periods of the video signal, and the vertical blanking period of the analog recording track is shown in FIG. 7a and 'b.

1 to rack L+, L2°t3. within the range shown in C and d.
... is recorded.

Further, the address signals AC, AT and AN are recorded in time series in the vertical blanking period recording portions a to d of four analog recordings 1 to rack on the disk 12, respectively.

Furthermore, the digital recording tracks of the disk 12 are also formed on the spiral tracks 1 to T, as shown in FIG. It is recorded as the first FM signal,
Vertical blanking period distribution portions a-d do not exist. However, the above reference signal [P3
is the analog recording track reference signal “P3 and disk 1”.
2 are aligned in the radial direction, and on both sides 4; i see 1. ji f p + , f p 2
Kami-sama ni 11-(It is recorded in cycles. Gonawara,
The reference signals fp+ to [ρ3 are always recorded on the disk 12 at a constant period, regardless of whether it is an analog recording track or a digital recording track.

The i-rack pattern itself is the same as the video disc and digital audio disc previously proposed by the applicant, and the signal format of the digital signal of the digital recording mill rack (FIGS. 2 and 4) and FIG. The signal format of the digital video signal shown in FIG. 3 (especially related to still images as mentioned above, but can also transmit partial moving images) and the frequency spectrum shown in FIG. 3 are also the same as those of the digital audio disc mentioned above. Further, the signal frequency spectrum of the analog recordings 1 to 6 shown in FIG. 6 is also the same as that of the video disc A.

On the other hand, the disc according to the present invention has the digital signal processing circuit 10 in which the first FM signal from the digital signal processing circuit 6 is recorded, and the analog signal processing circuit 10.
Analog record 1 in which the FM signal of output box 2 is recorded
. . . racks are mixed on the same surface according to the recorded information contents, and digital signals are transmitted and recorded at a frequency of 44.100 kHz. However, information about our store where audio signals such as music signals are to be played back in ultra-high fidelity, and image information where still images such as encyclopedias need to be played back, are recorded in digital records 1 to 3, while video image information is recorded in analog records. recorded on the track.

Furthermore, the number of rotations of the digital audio disc proposed earlier by the present applicant is 900 rρn1, the number of blocks per revolution is 2940, and the transmission frequency of one block is 44,100 kl-IZ. On the other hand, the transmission frequency L of one block of the digital recording track for one rotation of the disk according to this embodiment (j 44,100 kHz)
z is the same as the digital audio disc above, but its rotation speed is 899.1 rpm, the same as the video disc.
, and the number of blocks per rotation is as described above.
2942. The difference is that it was selected in '14.

4. Since the number of blocks per revolution is not a natural number and there are fractions, the disk 12 is divided into analog recording areas 1 to easy recording areas 1 indicated by diagonal lines C, as shown in FIG.
3.15, if the rack recording area 17'I is interposed in the digital recording 1, the reference signal fT) 3 of the adjacent track in the digital recording 1 to rack recording area 12C starts recording. Digital signals at positions (indicated by dashed lines fq in FIG. 8) are recorded such that the same signal positions in one block are not adjacent to each other but are shifted from each other.

Since the digital signal is recorded on the disc according to the present invention without synchronization with the composite video signal, the transmission frequency of the digital signal is extremely accurate at 44.100 kt71.
It has the advantage of being recorded in z.

As a result, by making some changes to the existing playback device for the disc of the present invention, it can be played back interchangeably and without distinction from the existing digital audio discs and video discs proposed by the applicant. be able to.

In addition, in the disc according to the present invention, between the digital recording track and the analog recording tracks 1 to 1, there is a first F f which replaces a silent signal with no data with a modulation signal, for example.
The 1-rack where the vl signal is recorded has 4 tracks,
The video period signal in the NTSC composite video signal is 1-
A total of 8 tracks, 4 tracks in which a second FM signal in which a composite video signal representing all black image information is recorded as a modulation signal, are interposed.

Next, an apparatus for reproducing a disc according to the present invention will be explained. FIG. 9 shows a block system diagram of an example of a disc reproducing apparatus for reproducing discs according to the present invention. In the figure, the disc playback device consists of a player 1' 81i 16 and an attacher section 17. Pre=l (The turntable 18 in 16 is rotated by the motor 19. Play A1
When the load switch of the key manual device 20 of the unit 16 is operated, the switch output is input to the command processor 21 and further supplied to the microprocessor 22. Roman 1-j Loretsuli 21 determines the key human power signal of the key human power device 20 and the external personal computer, etc. (signals etc. are supplied to the command 1 from the device with functions, and the display is determined according to the display mode. (not shown in the figure), and its input is transferred to the microb 1J22.

The microcontroller 1/22 generates a clock and status as described later and supplies them to the command processor 21, while controlling the operation of various mechanisms and circuits in the play 17 section 16 to operate the load switch manually ( Therefore, the disc 23 is placed in a state in which the disc can be inserted from the outside.As the disc 23 is outside the player section 16, it is contained in a storage case as previously proposed by the applicant, and the disc 23 is in the state in which the disc can be inserted from the outside. When the storage case is inserted into the player section 16 and then pulled out, the lid plate of the storage case and the disc 23 are moved to the player section 16 by a predetermined mechanism (detailed explanation will be omitted). The disc 23 remains inside and is placed on the turntable 18.

On the other hand, at the same time, the play 17 part 1
A plurality of microswitches (not shown) provided in the inner part of the 6 are turned on or off, thereby causing various You can identify the recorded contents of a disc and the surface to be played. Each output signal of the above-mentioned microswitch (for example, a disc discrimination signal indicating whether the disc 23 is a digital audio disc or a video disc (the disc according to the present invention is also identified as a video disc)) is input. Microwave from terminal 24 ν
22. This allows microprocessor 2
2, for example, serially DIN the status of 25 pits.
output to the pin terminal 253 of the 8-bin connector.

The above 8-bin connector has eight pin terminals 251 to 258 arranged as shown in FIG.
The address data from the adapter 81+17 is input to the pin terminal 252, and the playback signal (RF signal) is outputted from the pin terminal 252 as required. 11Jit
A cloak signal from a device with X3 capability is input. Further, a tarlock signal from the microprocessor 22 is outputted from the pin terminal 255, and an external synchronization signal is inputted from the adapter section 17 to the pin terminal 257. Furthermore, pin terminal 258 is grounded and pin terminal 256 is not used.

d3. When connecting the player unit 16 to a personal computer or the like, address data is output from the pin terminal 251, a playback audio signal is output from the pin terminal 256, and the pin terminal 257 is not used. ~', which is different from the case of connecting to the adapter section 17.

The status taken out from the microprocessor unit 22 is information data indicating the surface of the disc 23 to be reproduced, the type of the disc 23, the recorded contents, the reproduction mode, the key area position, etc., and is synchronized with the clock signal. is output,
The pin terminal 253 is supplied to the status decoding circuit 27 via the pin terminal 263 of a DIN type 8-pin connector having pin terminals 261 to 268 as shown in FIG. The value for pin 1 is detected, indicating whether or not it is a digital auto-sub disk. d3,” The clock signal of “2” is connected to pin terminal 25.
The signals are outputted to the status decoding circuit 27 and the like via 5.26s. The output signal of the status decoding circuit 27 is applied as a switching signal to switch circuits 28 and 29, respectively.1. When playing a digital A-video disc, the switch circuit 28 is connected to the terminal A side, and the switch circuit 29 is not opened.On the other hand, when playing the disc or video disc of the present invention, the switch circuit 28 is connected to the terminal V side. , and the switch circuit 29 is opened. Therefore, assuming that the disc 23 to be reproduced is the optical disk 12 according to the present invention, the switch circuit 28 is switched and connected to the terminal V side, and the switch circuit 2 (, )
will be opened.

In the adapter section 17, there is a transmission frequency of 14, which is the transmission frequency of the digital signal (block) of the digital audio disk.
An oscillator 3012'i that outputs an oscillation frequency of 6,174M l-1z, which is 0 times the frequency, is built-in. The output of the oscillator 30 is 0.174M t-1z (No. 8 is fed to the terminal A of the switch circuit 28 by 1, while the frequency is divided by 1, -'392 by the frequency divider 31 to become 15.75 kl-IZ. The output terminals of the two switch circuits are connected to the switching circuit 32 via pin terminals 2'67 and 257, respectively.

When the output horn signal of the frequency divider 31 is input from the pin terminal 257, the switching circuit 32 selects and outputs it, and when the output signal of the frequency divider 31 is not input, the oscillator 33 outputs the horizontal scanning frequency fH. The circuit is configured to selectively output the following signals. FIG. 11 shows a circuit diagram of an example of this switching circuit 32. In the figure, a pin terminal 257 is connected to a capacitor 72, diodes 73, 74 . Condens'+J75.

It is connected to a rectifying and smoothing circuit made up of a resistor 76, and to one input terminal of a two-man power ANDI path 80. Also, the output (J) end of the rectifying and smoothing circuit is connected to the inverter 77.
It is connected together with the input terminal 70 to the two-man power AND circuit 78 through the inverters 77 and 79, respectively, and to the other input terminal of the -UA N Im1 circuit 80 through the inverters 77 and 79, respectively. ΔN l) Each output terminal of the circuits 78 and 80 is connected to an output terminal 82 via a two-person IOR circuit 81.

In the switching circuit 32 having the above configuration, the input terminal 70 is connected to the horizontal scanning frequency 1 from the oscillator 33 inside the brake unit 16
A signal with a frequency equal to 5,734 kl-IZ is always incoming and supplied to the AND circuit 78.

In this state, when playing a disc other than the digital audio sub-disk, the switch circuit 29 is opened, so no signal enters the pin terminal 257, and therefore the voltage generated across the resistor 76 becomes low level. . Therefore, a high level signal is applied to one input terminal of the AND circuit 78, and a low level signal is applied to one input terminal of the AND circuit 80. This results in
The output signal of the AND circuit 80 is always at a low level,
On the other hand, the output signal of the AND circuit 78 is the output signal of the oscillator 33 from the input terminal 70, and this output signal is outputted through the OR circuit 81 as a motor rotation synchronization signal to the output width terminal 82. That is, when playing back the disc or video disc according to the present invention, the turntable 18 is rotated in synchronization with the output of the oscillator 33 inside the seventh section 16 (internally synchronized).

On the other hand, when playing back a digital audio disc, the switch circuit 29 is opened, so the output signal of the frequency divider 31 enters the bin terminal 257.

As a result, the external input signal from this bin terminal 257 is transferred to the inverter 71. After passing through each of the above rectifier circuits and converting into a -C positive DC voltage, the polarity is inverted by an inverter 77 and supplied as a low level signal to an AND circuit 78, and further passed through an inverter 79 as a high level signal to an AND circuit. 80. As a result, the output signal of the AND circuit 78 is always at a low level, and on the other hand, a signal of the opposite phase to the input terminal of the bin terminal 257 taken out from the inverter 71 is taken out from the AND circuit 80.
It is output as a motor rotation synchronization signal from an output terminal 82 through an R circuit 81.

Returning to FIG. 9 again, assuming that the disk 23 is the disk according to the present invention, the motor rotation synchronization signal of 15.734 kl-lz taken out from the switching circuit 32 is After being frequency-divided by 1/21, it is supplied to comparators 3 and 5. On the other hand, the rotating shaft 3 of the motor 19
6, a central portion of a gear 37 is fixed therethrough.

Teeth are formed at equal angular intervals on the outer circumferential surface of the gear gear 37, and a magnetic detector 38 is installed at a position facing the teeth at a slight distance apart. When it rotates, the turntable 18. The disk 23 placed on the turntable 18 and the gear A7 gear 37 rotate together with the rotation, and each time the teeth of the gear gear 37 pass in front of the magnetic detector 38, One pulse is extracted by the magnetic detector 38J and supplied to the comparator 35.

Here, since the analog recording track of the disk 23 is signaled with an NTSC color image signal of 4 fields per revolution, the number of recording scanning lines is 1 per revolution.
050 pulses, so the magnetic detector 38 outputs 1 pulse.
21 scanning lines will be reproduced every time 21 scanning lines are output. Therefore, the frequency divider 34 has a horizontal scanning frequency of 15.73
4 kl-lz is divided into 1/21, and the divided output signal is supplied to the comparator 35 together with the output pulse of the magnetic detector 28, where it is converted into an error voltage according to the phase difference, and then the motor It is supplied to the motor 19 via a drive amplifier 39. As a result, the rotation of the motor 19 is controlled so that the reproduction horizontal synchronization signal of the disk 23 is reproduced at the same frequency as the morph rotation direction lIl] signal of 15.734 kHz supplied to the frequency divider 34. and motor 19 is 8
9' It is rotated at 1.1 rpm.

Motor 19. The rotation of the turntable 18 and the disk 23 starts as described above. When the user presses the start switch in the key manual device 20, the command processor 21 and the microprocessor 22 are activated to move the feed mechanism 40 to the disk 23. A signal for moving the disk 23 toward the inner circumference is output, and then a scan 1141 is performed on the disk 23 by one movement. Since the disk 23 has an electrode function and electrodes are formed on the scanning pin 41, capacitance is formed between the disk 23 and the electrode of the scanning nail 41.
It changes in response to changes in the geometry of the recording track, and this change is converted into an electrical signal by the pickup circuit 42 in a known manner.

The reproduction signal (RF
The doubled signal is supplied to a known tracking servo circuit 43, where the reference signal [Pl] described above is supplied.

After fP2 is discriminated and separated, envelope detection is performed, and the detection outputs are differentially amplified and converted into tracking error signals. This tracking error signal is applied to the dragging coil 44, and the scanning! 141 always scans on the information signal recording track without any deviation from the I~rack.
The 11th end of 1 is momentarily and minutely displaced in the track width direction.

Further, the reproduction signal taken out from the pickup circuit 42 is supplied to an information signal reproduction circuit 45, where the second FM signal reproduced from the analog recording track is
After being demodulated, the composite video signal and audio signal based on the NTSC system are reproduced.
is output to the output terminal 46, and the reproduced audio signal is output to the output terminal 4.
7.

Furthermore, the reproduced signal taken out from the pickup circuit 42 is
The attacher portion 17 is connected to the attacher portion 17 via the pin terminals 252 and 262, respectively.
After being supplied to the FM demodulation circuit 48 in the FM demodulation circuit 48 and subjected to FM demodulation there, the signal is sent to the vertical synchronization signal detection circuit 49, the address data acquisition circuit 50. The signal is supplied to a synchronization signal detection circuit 51 and a digital signal demodulation circuit 52, respectively. Synchronous signal detection circuit 51
is the synchronization signal (indicated by S in FIG. 2) in the digital signal of the signal formats 1 to 1 shown in FIG. The detection circuit generates and outputs a synchronization signal detection signal of 44.1003 Hz, which is equal to the transmission frequency of the digital signal, and supplies it to the phase comparator 53. The phase comparator 53 is 4 from the 1/140 frequency divider 54.
4. Compare the phases of the 100 kl-1z signal and the synchronization signal detection signal, apply the phase error signal corresponding to the phase difference to the voltage controlled oscillator (VCO) 55 as a control voltage, and set its output oscillation frequency to Variable control. The signal taken out from the VCO 55 is divided into 1. After being frequency-divided by /140, it is supplied to the phase comparator 53.

That is, phase comparator 53. VCO 55 and frequency divider 54
constitutes a well-known phase-locked loop (PLL), and a signal of e, 174M l-1z, which is 140 times the frequency of 44,100 kHz and is phase-locked to the synchronization signal detection signal, is extracted from the VCO 55. This signal is supplied to the digital signal demodulation circuit 52 as a master clock signal through the switch circuit 28.

This digital signal demodulation circuit 52 detects the presence or absence of an error using the error detection code CRC in the demodulated digital signal reproduced from the digital recording track and has the signal format shown in FIG. The correction codes P and Q are used to restore the original correct code, and the digital audio signals transmitted at the positions shown by Ch-1 to C11-4 in FIG. While the output to the switching device 56 is reversed, Ch, -3 and Ch-4
When the digital video signal No. 6 is placed at the position shown on the other hand and the digital video signal No. 6 is transmitted, the digital video signal is supplied to the 6γ1 still image decoder 57. [] The Δ conversion and switching device 56 performs digital-to-analog conversion of the digital audio signal and is then controlled by a switching circuit based on the output of the address data acquisition circuit 58.

Still picture decoder 57 generates a desired standard television format analog video signal of the original still picture from the input digital video signal and outputs it to output terminal 59 . On the other hand, the address data acquisition circuit 58 has one block per block.
After accumulating incoming signals bit by bit to obtain a control signal in the signal format shown in FIG. 4, data is taken in.

The data fetched by this address data fetch circuit 58 is supplied to the terminal of the switch circuit 60, while the data fetched by the DA
A switching signal supplied to the conversion and switching device 5G and generated based on the data allows only the A-dio signal transmission channel to pass through and selects a predetermined two of the output terminals 61 to 64 of each of the four A7 channels. Connect it to the above output terminal.

In other words, the 4-channel audio signal is recorded on disk 1.
When the audio signal is played from the disc 23, the audio signal is taken out from all the output terminals 61 to 64, and when the audio signal of the 3 channel A channel is played back from the disc 23, the audio signal is taken out from the output terminals 61 to 63, Furthermore, when two types of two-channel audio signals are reproduced, the selected one of the two-channel audio signals is taken out from the output terminals 61 and 62 (or 63 and 64).

The address data acquisition circuit 50 divides the address signals in the reproduced signal reproduced from the analog recording track into blocks 7 and 1.
11 t, the reproduced address data is taken in, and the read address data is transferred to the terminal ΔN of the switch circuit 60.
supply cover. Further, the discrimination circuit 65 receives the vertical synchronization signal detection signal from the vertical synchronization fR signal detection circuit 49, the digital 13
Error check for bow demodulation circuit 52 ↑U; 4 CRC j
:6 signals indicating the test results are supplied respectively, and the above detection 1
1.1. The period during which the test results do not arrive and a polysignal indicating that the above test results are correct is received.1.1. , it is determined that the digital records 1 to 1 are being played back and the switch circuit 60 is connected to the terminal side, and on the other hand, the detection signal is received and the test result is erroneous. During the period when the η signal is received, it is determined that the rack is being reproduced from the analog recording 1, and the -C switch circuit (50) is switched and connected to the terminal AN side.

As a result, from the switch circuit 60, the analog recording 1
During playback, the output of the address data acquisition circuit 50)j
Address data is taken out, and on the other hand, when a digital recording track is reproduced, the output address data of the address data acquisition circuit 58 is taken out. This playback address data is transmitted to the player unit 1 via the bin terminals 261 and 251, respectively.
The command processor 21 and the microb 1 processor 22 in the microb 6 are respectively supplied. The command processor 21 sequentially displays the playback position of the scanner 141 using specified address data, while the microprocessor 122 generates various signals based on the desired signal from the key input device 20 and the input address data. Output to the foot feed mechanism 40, for example, in the case of random access, the key manual device 20
The scanning stylus 41 is quickly moved to the track position of the specified address.

In this way, the digital recording 1 is recorded on the disk 23''2.
If the recording is formed by mixing racks and analog recording racks, the recorded green signal of the recording track is reproduced suitably.

Note that when the disc 23 is a conventional digital audio disc, the switch circuit 28 is switched to the terminal A side by the output fL of the status decoding circuit 27, the switch circuit 29 is closed, and the oscillator is output from the switch circuit 28. Outputs 115 and 75 of the frequency divider 31 are output from the switch circuit 29 and output from the switch circuit 29. The IZ signal is taken out and sent to the bin terminal 267.257, switching circuit 3
Frequency division 1a34 as a motor rotation synchronization signal via 2
U1 is applied to.

Further, the switch circuit 60 is always connected to one side of the terminal.

Further, in the conventional video disk playback port y, a switch circuit 28 is connected to the terminal Vff1ll, similar to the disk playback (H) according to the present invention, and a switch circuit 60 is normally closed to the terminal AN side.

41. When playing analog recording 1-rack, in order to correct jitter during playback, as is well known, the scanning needle /11 is set to 1.
- While minute displacements are instantaneously covered in the rack scanning direction, the jitter of the reproduced digital signal of the digital recording track can be corrected by the digital signal demodulation circuit 52, so the displacement driving operation on the scanning side 41 is This is unnecessary, and therefore, such an operation is turned on or off depending on the track to be reproduced. A displacement drive mechanism (jitter correction coil) in the track scanning direction on the scanning side 41.

The output signal of the circuit 49 for detecting the presence or absence of a vertical synchronization signal can be used as the signal for turning on and off the vertical synchronization signal. However, the above jitter correction operation can be performed from analog recording 1 to
This may be done irrespective of whether it is a rack or a digital recording rack.
No. 190, "As proposed by C, in view of the fact that the reference signals fp+ and fp2 are recorded in 11-1 cycles, such reference signals [Pl.

scanning side 41 so that rp2 is regenerated in 11-1 cycles.
A possible method is to displace the track in the track scanning direction.

Application Example Note that the present invention has N T at a rate of 4 fields per revolution.
As described above, the disc has a composite video signal converted from an SC color video signal into a predetermined signal format recorded on an analog recording track. It can also be applied to color video signals such as signals and PAL systems with 625 scanning lines, SECAM systems, etc.
However, the composite video signal may be recorded at a ratio of (N is a natural number).

Composite video signals of N fields per revolution are recorded, 7 no-log recording tracks and digital signals are FM.
Naturally, the period of one revolution of the disc according to the present invention, in which digital recording tracks and the like are recorded in a mixed manner, is equal to the value obtained by multiplying the vertical scanning circle i1 by N.

Furthermore, although the present invention has been described as being compatible with the digital audio disc and video disc previously proposed by the applicant, the present invention is not limited to this, and may include a configuration in which the green signal can be read with a light beam. It goes without saying that the present invention can be applied to discs of this type, and also to discs of a type in which reference signals rp+ to [P3 are not recorded.

Furthermore, as the information signal to be recorded, as previously proposed by the present applicant in Japanese Patent Application No. 13944/1980, the digital Igi of an external personal computer, etc. can be transmitted between a device with the capability of recording and a disk reproducing device. It also includes programs for performing interactive control.

Furthermore, as the information signals recorded on the digital recording track, all four channels can be used as information signals other than audio signals (for example, video signals), for example, for encyclopedias, telephone directories, etc.

Effects As mentioned above, according to the information signal recording disk of the present invention,
an analog recording track on which a modulated wave signal obtained by analog modulation with an information signal including at least a composite video signal is recorded at a rate of N fields per revolution (N is a natural number);
Information signal - C: 44, 44, 44,
Synthesize Δ in time series at a transmission frequency of 100 kl-I Z
Since the digital signals to be transmitted are mixed with digital recording tracks that are modulated and recorded without synchronization with the composite video signal, analog recording 1 to easy digital Since the recorded 1 frame can be reproduced without distinction (compatible reproduction is possible in a complete sense), and since the digital signal is essentially a signal completely unrelated to the synchronization signal in the composite video signal, during this time the 1 frame signal can be reproduced. It is not necessary to record so that the phases of the blocks match; on the other hand, if it is recorded so that the phases of the blocks match, the phases of each block are aligned in the radial direction of the disk, or the transmission frequency is precisely set to 44.01 Okll Z. However, in the present invention, since such synchronization is not achieved, it is possible to record the transmission frequency of 44.100 kl-IZ extremely accurately using a recording system with a simple configuration. In addition, the analog recording tracks 1 to 3 record mainly video information and audio information related to moving images, and the digital recording tracks mainly record video information AB related to still images. 1 of multiple A7 channels
Audio information that requires strict sound quality and fidelity reproduction for 9r (
By recording video (for example, music), it is possible to suitably avoid playing back video and audio information, and still images can be played back much more clearly than still images from video discs, and moreover, they can be played back along with audio signals. Furthermore, digital recording from 1 to 1000 can reproduce audio information with a wider dynamic range and extremely high fidelity than conventional video discs, so that the recording of video and audio information intended by software producers is more accurate than the information recorded. It has the advantage that it can be played back optimally depending on the content, and that it can provide a synergistic effect that is greater than simply combining a digital audio disc and a video disc.

[Brief explanation of drawings]

FIG. 1 is a block system diagram showing an embodiment of the recording system for recording the information f2 recording circle 13 according to the present invention, and FIG. An example of the signal format Δ-matsu 1 for one block of 1 is shown below.
3 is a diagram showing an example of the frequency spectrum of the frequency modulated wave fS @ etc. recorded on the rack in the digital recording 1, and FIG. 4 is a diagram showing each address number recorded on the digital recording track of the disc of the present invention] -1- signal format i~
FIG. 5 is a diagram showing an example of the signal formats 1 to 1 of the digital video signal recorded on the digital recording track of the disc of the present invention, and FIG. Figure J shows an example of the frequency modulated wave signal recorded on the Herakku and the frequency spectrum of the reference credit.
FIG. 7 is a diagram showing one 1ul of the track pattern of the disk of the present invention, FIG. 8 is a diagram explaining the state of the phase shift of blocks that are easily tracked from digital recording 1 to d of the disk of the present invention, and FIG. A block system diagram showing an example of a reproducing device for reproducing discs according to the present invention, FIG. 10 is a diagram showing an example of one IN type 8-pin connector, and FIG. , There is a circuit diagram C showing an example of a 7I circuit. 1.2.9...VTR15...Oscillator, 6...
・Digital signal processing circuit, 7... Controller 1 roller,
8... Switch circuit, 10... Analog signal processing circuit, 12° 23... Information signal recording disk (disc), 1
3゜15... Ana [1g recording track recording area, 14
...Digital recording 1 to easy recording area, 16...
Player part, 17... Adapter part, 18... Turn table, 19... Motor, 21... Command controller, 22... Microprocessor -125+~2
5a, 26+ to 268...Bin terminal, 27...Status decoding name, 28.29.60...Switch circuit, 30.33...Oscillator, 32...Switching circuit, 41
...Scanning↑1.45...Information signal regeneration circuit, 46.5
9...Reproduction composite video signal output terminal, 47.61-64
... Reproduction trolley No. 15 output terminal, 48 ... 1N・1 demodulation circuit, /19 ... Vertical interval +1] bracket detection circuit, 50
．． 58...Address data acquisition circuit, 51...Synchronization signal detection circuit, 52...Digital signal demodulation circuit, 5
6... D'A conversion and switching device, 57... Still image decoder, 70... Input terminal, 82... King-to-ta rotation synchronization signal output terminal. Figure 2, l ”31 Figure 4 Figure 6 Figure 7 foq Figure 8 oq

Claims (2)

[Claims] (1) Analog modulate with an information signal containing at least a composite video signal, and transfer the obtained modulated wave signal to the analog record 1 where the obtained modulated wave signal is recorded at a rate of N fields per revolution (N is a natural number), and the information signal. At least a synchronization signal to the digital data of multiple channels obtained by digital modulation,
An error correction code and an error check code are added to form a -C1 block, and for each block, the digital signals synthesized in time series at a transmission frequency of 44.100"Z are further modulated to -C the above composite. Information (No. A recording disk) characterized by the fact that the digital recording tracks are recorded without being synchronized with the video signal. (2) The information signal recording disk according to claim 1, wherein the composite video signal is a composite video signal of a 525 scanning line system.