UA84461C2 - Method for reading information from mechanical phonogram - Google Patents

Abstract

Method for reading information from mechanical phonogram relates to creation of systems for representation of audio-information from carriers with mono-relief record. In the method of reading information from mechanical phonogram of rarity carriers of record one performs reading with method of contact of needle with groove, rate of rotation of record carrier at reading is decreased more than 10 times compared to nominal rate of record, with transformation to digital code of information on profile of micro-relief information track. At reading one uses sound receiver with spherical tip compatible with dimensions of groove, with optical sensitive element built on basis of Michelson interferometer with use of differential photometry. Method for reading information from mechanical phonogram placed on rarity carriers (phonographic Edison’s cylinders, plates with deep record) makes it possible to decrease a lot dynamical load on surface of information carrier and to provide high-quality reading of sound signal without damage, to take profile of sound track itself with following registration in digital form, this provides more accurate representation of around signal, top perform reading of information from damaged carriers at presence of mechanical damages like cracks, chips.

Description

bones of the recording of the phonocylinder, i.e. within 120-0.01μm. When the phono cylinder. rotates at 180 rpm. element scans the surface of the phono cylinder

The disadvantage of this method, despite the non-parallel lines of the axis of the cylinder by separate sections with a significant value of the pressing force of the sound pickup (in 15 steps of 0.017 around the circle. The number of such sections is 20mMnH), is the presence of physical contact of the needle with the ten- 36000. Measurements of the section are performed by the child surface of the sound track of the wax photo every 10 μm along the axis. The no-cylinder array obtained in this way when playing back at the rotation speed of the data consists of three coordinates: the rotation angle, which is equal to the nominal recording speed. tanya, position on the cylindrical axis, depth.

As a result, the dynamic load on the floor is quite significant after complex computer processing. lead to the deformation of the profile of the sound track or the Advantage of the method based on metrological destruction of it in general. And this, in turn, can lead to distortion of the reproduced sound. At the same time, it was found that typical industrial electrindite phono cylinders are the most safe for preservation. The disadvantages of the known method are the lack of the ability to read phono cylinders from a mechanical (gram record), while the sound grooves are formed by deep recording. As a result, when dust adheres to the information, the sound signal, when playing the electronic, significant time spent on processing the array with a sound recorder, does not correspond to the real data. profile of the sound grooves, which are recorded on the phono- The closest method to this technique is a cylinder, and thus the quality of the signal definitely deteriorates. in patent 56829207 "Meipoay g hesopvigisiyop oi

A well-known optical method of reproducing sound from rpopodgari! gesogaz iot rnuzisa! Theazihetep!" |b), phono cylinders (41. The principle of its operation is that for the reproduction of sound from a mechanical phono- a focused laser beam, which grams is used to measure the sound profile, is aimed at the modulating groove of the phono cylinder groove with the help of mechanical , or the optic, reflecting off the latter, carries optical instruments. Well, the information that, after being received by its photoreceiver, is transformed into an electric sound signal as a mechachem. The only advantage of the optical method of the taper groove is the possible application of sound coordination from wax phono cylinders - this is a contactless measuring machine, an interferometer. The essence of accurate reading of information, which is the most prototype-less method, is explained by drawings 1, 2. Furnace. In Fig. 1 presents a block diagram of the method-

However, there is one very important and significant drawback - the prototype, consisting of a mechanical phonograph, the incorrect sound reproduction of information related to us in the form of a gramophone record, measuring int- that the structure of the reflecting surface of the cylinder is jet 2, computer 1. Fig. 2 shows a mechanical phonogram in a non-homogeneous cross-section due to the presence of: destruction of the base (gram phono cylinders, dust adhesion; microorganisms, record) 3, where the sound groove 4, a needle causing the development of mold is depicted; irreversible measuring instrument 5. cesses of chemical aging of the material base, etc. | Contacting the audio track 4, the needle is consequently extremely low signal-to-noise ratio of the measuring instrument 5 deviates. The results of examinations of the physical state of the relationship to the geometry of the sound groove, which fixes the information surface of wax cylinders with a measuring instrument. The obtained data show that, in general, the vast majority of them are needle deflection maps that are sent to the computer because of damage to the surface of I5|. Therefore, in the application of a non-destructive optical method, the sound signal is rusted after appropriate processing. quality reproduction of most The disadvantages of the known method are: phonographic cylinders. 1) absence of its practicality in the description of the patent

There is also a known method of reproducing the mechanical implementation with the indication of the reading results, the phonogram, which assumes metrological measurement - that is, this patent only assumes the measurement of the geometry of the sound groove, i.e. the profile. ability to use the method for reproduction

To obtain sound, the readable information is sub-recordings of a mechanical phonogram; computer processing. Profile measurement 2) the patent does not specify the value of the pressing sound groove can be done using the force of the measuring tool; mechanical tools |6|, or optical |b, 71. 3) possible reading of information takes place-

In contrast to the optical method |(|5I|, which is sown with the help of a needle of a much smaller size than that used by the laser beam reflection method, the width of the groove, which makes it impossible to reproduce the metrological measurement in (|7| is carried out by the 3rd of many phono cylinders with the presence by mechanical scanning of the sound grooves of the phono cylinder for damage in the form of cracks, chips due to the possible use of a microscope. For scanning, a thin needle stuck in them, which will eventually lead to the destruction of the sound grooves. The basis of the invention is a method of readable sensitive element having a point size of 1.5 μm, extracting information from a mechanical phonogram, which has a depth of field of 350 μm, a resolution that ensures non-destructive and high-quality reproduction of audio information even from damaged media at tera 1. To receive a sound signal, perform the presence of mechanical damage in the form of friction the rate of change of the dimension of the profile of splinters, splinters. surface and its computer processing. Calculated

The given task is solved by the fact that the original speed of playback corresponds to the acceleration of information from the mechanical phonogram of the rotation speed during recording. At the same time, the digital one is created by the method of physical contact of the needle with the groove. The signal is programmatically compressed in time by as much as the needle, while the dimensions of the needle are commensurate with the dimensions of the grooves, as much as is necessary for the speed of the reproduced groove and the speed of rotation of the carrier to correspond to the speed of the signal. initial nominal speed is more than 10 times. In writing on a phono cylinder. qualities of the sound pickup (measuring instrument) In order to ensure stability and accuracy, an optical sensitive element was used, an interferometric measuring system 10 was built on the basis of a Michelson interferometer made of a stationary cone. Recording of the sound profile using differential photometry, which is carried out with the help of a synchronous track, allows you to remove from the mechanical phonogram the rotation and axial movement of the phono cylinder, the profile of the sound track with subsequent registration with respect to a stationary interferometric system. in digital form and provides a more accurate reproduction of the sound signal. The value of the pressure at a speed of 12o0b/min. The longitudinal speed of movement of the sound pickup on the surface of the information carrier of the cylinder is set by the tracking system and is equal to 20MN. following the track in such a way that the head sounds

When the reading speed is reduced, the signal spectrum shifts to a lower angle when the detector touched each groove under a direct line. frequency domain. Studies of typical electro- Interferometer 10 is an integral part of sound pickups have shown the impracticality of their use. phono cylinder.

As a result, it was proposed as a pickup. Fig. b6 shows a fragment of the real interpolated optical sensitive element, the construction of the reference signals Shi and O", which were obtained on the basis of the Michelson interferometer with the reading of the phono cylinder and the waveform using the method differential photometry. of the Shu audio signal after interference processing

In contrast to traditional sound pickups, promotional signals. a new optical-mechanical method of measuring para- Reducing the speed of rotation of the information carrier of the sound groove provides measurement of mation when reading more than 10 times from the nomi- the profile of the information track, which increases the nal speed of recording allows significantly (higher accuracy of reproduced sound vibrations |8 , 91. than 100 times) reduce the dynamic load

The essence of the invention is explained by the drawing, which is placed on the surface of the information carrier and provides the images: non-destructive and high-quality reproduction of the sound - in Fig. 3 - the position of the needle in the sound groove; information even from damaged wax phonocy- - in Fig. 4 - optical-mechanical sound pickup; Linders This was confirmed by an auto- - in Fig. 5 - a generalized functional diagram of the framework for evaluating the mechanical properties of the recording medium of the active device of non-destructive reproduction of the info- - phonocylinder. As a result of the evaluation of the performance of phono cylinders, which works in accordance with the mechanical properties using an indirect method of reading information from the electroacoustic measurement, it was established that the mechanical phonogram; to prevent damage to phono cylinders, - in Fig. 6 - time diagrams of signals. reducing signal distortions and obtaining more

Fig.A4 shows a developed optical integrity phonogram rotation speed phono-mechanical pickup, which shows the reproducing cylinder, when reading, it is necessary to significantly reduce the linen needle 5, the housing of the pickup 6, elastic. sleeve 7, corner reflector 8. The results of research showed that at

The method and device for reading information from the phono cylinder rotation speed of 12 rpm and the vechanic phonogram is explained by the functional mask of the pressing force of the needle of the 20mMn sound pickup by the scheme (Fig. 5), where the computer 1 is depicted, the carrier of the waveform deformation is not detected, the amplitude of the information - phono cylinder C, needle 5, the optically reproduced signal did not decrease. Hence, the mechanical sound pickup 9, the interfero system means that the phono cylinder, as well as its ra 10, signal processing unit 11, tonearm 12, destruction sensor, did not wear out. position 13, positioner 14, rotation system The most significant advantage of using a spherical 15, control scheme 16. needle, which is commensurate with the dimensions of the groove

The claimed method is implemented as follows. (Fig. 3) is that when playing phono cylinders, which

The profile of the sound track of the phono cylinder is removed from scratches and cracks, the needle is smoothly moved with the help of a spherical needle 5 to the damaged places, without interrupting the contact with (Fig. 3) with a rounding radius r, commensurate with the burr and without destroying it. groove groove, and the opening angle of With a needle. Application of the interferometric system, a rigidly connected optical measuring element allows to ensure high accuracy and sensitivity of the arm of the interferometer, corner reflector 8 of the system of measuring the profile of the information do- (Fig. 4). The interferometric signal after retracing, which is equal to "0.0025 μm. The calculated vibration in the processing unit 11 reaches the computational precision with which it is necessary to ensure the measurement of the amplitude of oscillations to obtain 4. To5Niaki mai, ei a. Vergodisip oi 5zotspa of reproduced phonograms of high quality, taking into account that iMot siy zah rpopodgari suiipaegv ivipd She Iazeg- that the average amplitude of the recording of the groove is 5μm, dyna-reat heiPesip teyiyoa // Ariiiea Oriisv, my. 25, MB, power range 54dB (as for gramophone records), I dori- 1986. - R. 597-604. takes 0.01μm. 5. Novikova H., Skobets I. To the question of saving

Thus, the claimed method proves the experience of phonographic wax cylinders (in the NBU, the revision of this technical decision regarding the results. V. I. Vernadskyi) // Library Bulletin. - 1996. high-quality and non-destructive reproduction of information - Mob. - b. 10-12. tions from rare media. This method of reading 6. US patent 056829207, IPC p1187/28, of information from a mechanical phonogram allows to do- priority 7.12.2004. faithfully reproduce sound information without distortion 7. US patent О0О52005002319, IPC p1183/70, generation of signals even from damaged carriers and priority 6.01.2005. it can be used to reproduce the sound of 8. Reigom M.M., Kgtuyspip A.A., Zpapouyu 5.M., ku from wax phono cylinders and rare gram- Viabokop I.R., Kozuak I M. Oryutespapisa! teinoi oi records with deep recording. Voypa Hergodisiop Iyot Edibop Suiipdege // Rgos.

Sources of information: ZRIE. My. 3055 (Ipi Sopi. "Oriisa! biogade apa 1. US Patent 05200521, IPC 011183/00, Tgapetivviop oi Ipiogtaiop". 14-16 Mau. 1996. Kiem, priority 02/19/1878. OKgaipe). - R. 218-224. 2. British patent 58190306584, IPC 9. M.M. Reig, 0.5. Opizpepko, A.A. Kguisip,

ОИ1183/00, priority 03/21/1903. 5. M. ZPapouyu, R. VAViarokop. Oriotespapisai!

Z. Egap: I espivieg. And Memu sopvigisiei suiipaeg Meinoa oi Edizop Suiipaetv Zoshpa Vergodisiop. Ap geriau taspipe og 2-ipsy ayateiiyeg suiipayetg5 // Atsa Epdipeegpod Bosieiu Rgergipi 4491 (M 4).

Agspimipd (She acadio-mizna! Nepade: Tpiga uoipi Rgezepiea ai 102-pa Sopmepiip. 1997, Magsp 22-25, yesppisai utrovisht; 1990 Mau 3-5; Sapaadiap Mypisy, Septapu.

Mygeit oi Simiygainop, OMKama. - R. 145-148.

And her

Ge |. Teh "Y Z ! p

OIV LAI BYLYH

FC Phi? ! in YO and about it De x those, 8 sa sho Vaenenia and about ; Dnya chala, dy s DYA piky In Shk

Fig. Z Fig. a

SEMA GRO BLOKOBROBKY K.S.

INTERFEROMETER 00 SIGNAL:

Shi Ne : : yu- : Bonya pn an i v : ani | loudspeaker|- 4 tovavm 7-3 ignition ше ше ше: ин RE: и d- SVSTEMA 1 6- | position 1: hu ROTATION I: ryn NI y ' zny y NE sho IyishNDe : Ko. and in pc H 15: .

KU 3

WE SCHEME 1

I CONTROL |. In iyu and Yaunetsi ikh OMAN A la, DK zyukv lev

AND FOR BAIKNYNE ONEU U iya MO TEN enMeh I .

Coupon MB RAI VI y y Ve it: lrevniy y oo Ko a NE NN PIV IKY x KAN shi i ne an y y

Phis b

Computer layout V. Klyukin Signature Circulation 28 approx.

Ministry of Education and Science of Ukraine

State Department of Intellectual Property, str. Urytskogo, 45, Kyiv, MSP, 03680, Ukraine

SE "Ukrainian Institute of Industrial Property", str. Glazunova, 1, Kyiv - 42, 01601