SU114334A1 - Method for multi-channel magnetic recording-reproducing low-frequency physiological processes - Google Patents

Method for multi-channel magnetic recording-reproducing low-frequency physiological processes

Info

Publication number
SU114334A1
SU114334A1 SU588362A SU588362A SU114334A1 SU 114334 A1 SU114334 A1 SU 114334A1 SU 588362 A SU588362 A SU 588362A SU 588362 A SU588362 A SU 588362A SU 114334 A1 SU114334 A1 SU 114334A1
Authority
SU
USSR - Soviet Union
Prior art keywords
physiological processes
magnetic recording
recording
channel magnetic
reproducing low
Prior art date
Application number
SU588362A
Other languages
Russian (ru)
Inventor
Б.Я. Пятигорский
тигорский Б.Я. П
Original Assignee
Б.Я. Пятигорский
тигорский Б.Я. П
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Б.Я. Пятигорский, тигорский Б.Я. П filed Critical Б.Я. Пятигорский
Priority to SU588362A priority Critical patent/SU114334A1/en
Application granted granted Critical
Publication of SU114334A1 publication Critical patent/SU114334A1/en

Links

Description

Одновременную многоканальную запись нескольких низкочастотных физиологических процессов осуществл ют способом усилени  кансдого процесса отдельным каналом усилительного устройства с регистрацией процесса на общую ленту в виде многодорожечной записи. При таком способе регистрации устройство получаетс  сложным и имеет место, так называема  «перекрестна  модул ци , внос ща  искажение в запись. Описанный способ многоканальной магнитной записи - воспроизведени  низкочастотных физиологических процессов свободен от указанных недостатков. Многоканальность записи обеспечиваетс  тем, что дл  каждого записываемого процесса подбираетс  сво  несуща  частота в пределах 1000-3000 гц, поскольку высша  частота больплинства физиологических процессов не превыщает 100-150 гц. Совокупность предварительно усиленных и модулированных сигналов, в свою очередь, усиливаетс  одним общим усилителем, после чего подаетс  на записывающую головку магнитофона. При воспроизведении сигнал усиливаетс  общим предварительным усилителем и затем каждый процесс выдел етс  узкополосным фильтром, настроенным на несущую частоту, детектируетс  и подаетс  на свой конечный усилитель.Simultaneous multichannel recording of several low-frequency physiological processes is carried out by a method of enhancing the process by a separate channel of an amplifying device with recording the process on a common tape as a multi-track recording. With this method of registration, the device becomes complex and there is a so-called "cross modulation, a distortion of the recording. The described method of multichannel magnetic recording — reproduction of low-frequency physiological processes is free from the indicated drawbacks. The multichannel recording is ensured by the fact that for each recorded process the carrier frequency is selected within 1000-3000 Hz, since the higher frequency of the greater part of the physiological processes does not exceed 100-150 Hz. The set of preamplified and modulated signals, in turn, is amplified by one common amplifier, after which it is fed to the recording head of the tape recorder. During playback, the signal is amplified by a common pre-amplifier, and then each process is allocated by a narrow-band filter tuned to the carrier frequency, detected and fed to its final amplifier.

На чертеже представлена блок-схема устройства дл  осуществлени  способа, где:The drawing shows a block diagram of an apparatus for carrying out the method, where:

/а, 2а, За-предварительные усилители;/ a, 2a, Over-pre-amplifiers;

А, Б, В - входы предварительных усилителей;A, B, C - preamplifier inputs;

16, 26, 36 - модул торы сигналов;16, 26, 36 — signal modulators;

4- общий конечный усилитель;4- common end amplifier;

5- магнитна  головка магнитофона (ГЗ - записывающа , ГВ - воспроизвод ща );5- magnetic tape recorder head (GZ - recording, GW - reproducing);

6 - предварительный усилитель воспроизведени ;6 - preamp amplifier;

1в, 2в, Зв - узкополосные фильтры каналов;1v, 2v, Sv - narrowband channel filters;

1г, 2г, Зг - детекторы и конечные усилители соответствующих канаJ . ,;1d, 2d, 3g - detectors and final amplifiers of the corresponding channels. ,;

Г, Д, -выходы конечных усилителей.G, D, -outputs of the final amplifiers.

Предмет изобретени Subject invention

Способ многоканальной магнитной записи-воспроизведени  низкочастотных физиологических процессов, отличающийс  тем, что, с целью устранени  перекрестных искажений при многоканальной записи и упрощени  самой записи, последнюю производ т на магнитный носитель одной головкой -с применением различных несущих частот по каждой записи , а при воспроизведении дифференцировка процессов осуществл етс  узкополосными фильтрами, настроенными на соответствующие использованные несущие частоты.A method of multichannel magnetic recording-reproduction of low-frequency physiological processes, characterized in that, in order to eliminate cross-sectional distortions during multichannel recording and simplify the recording itself, the latter is produced on a magnetic carrier with one head using different carrier frequencies for each recording, and during reproduction differentiation The processes are carried out by narrowband filters tuned to the respective used carrier frequencies.

SU588362A 1957-12-21 1957-12-21 Method for multi-channel magnetic recording-reproducing low-frequency physiological processes SU114334A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU588362A SU114334A1 (en) 1957-12-21 1957-12-21 Method for multi-channel magnetic recording-reproducing low-frequency physiological processes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU588362A SU114334A1 (en) 1957-12-21 1957-12-21 Method for multi-channel magnetic recording-reproducing low-frequency physiological processes

Publications (1)

Publication Number Publication Date
SU114334A1 true SU114334A1 (en) 1958-11-30

Family

ID=48386713

Family Applications (1)

Application Number Title Priority Date Filing Date
SU588362A SU114334A1 (en) 1957-12-21 1957-12-21 Method for multi-channel magnetic recording-reproducing low-frequency physiological processes

Country Status (1)

Country Link
SU (1) SU114334A1 (en)

Similar Documents

Publication Publication Date Title
GB971757A (en) A picture signal recording system
GB1113515A (en) Method for magnetic recording and reproducing of high-frequency signals,in particular television picture signals as well as sound and/or synchronization signals
SU114334A1 (en) Method for multi-channel magnetic recording-reproducing low-frequency physiological processes
GB734101A (en) Means for producing dispersion in electrical oscillations
ES442466A1 (en) System for recording and/or reproducing a video signal
FR2357973A1 (en) RECORDING AND REPRODUCTION METHOD AND DEVICE
GB365639A (en) Improvements in or relating to methods of and apparatus for recording and reproducing sound
US3182135A (en) Apparatus for checking imperfections in a recording medium
GB990534A (en) Improvements in systems for reproducing signals recorded on magnetic medium
DE3850045D1 (en) Method for automatically optimizing the recording current for recording a video signal and arrangement for carrying out the method.
GB1011443A (en) Magnetic recording and playback device
SU434448A1 (en) PLAYBACK DEVICE &?:? "'' • - '•:.;, -Ch'T ^ ml g ---- ^' • '•• • •"'
SU559270A1 (en) Tape recorder
SU585526A1 (en) Apparatus for magnetic recording of information
RU2045097C1 (en) Device for multiband multichannel recording and reproduction of information from magnetic medium
GB798948A (en) System for reproducing signals from a magnetic medium
JPS5764327A (en) Pilot signal recording and reproducing system
SU418890A1 (en) DEVICE FOR REPRODUCTION OF FREQUENCY-MODULATED SIGNALS
SU526016A1 (en) Device for measuring time shifts reproduced from multi-track media
SU355647A1 (en) DEVICE FOR MAGNET RECORDING OF TWO SIGNALS
SU1191935A1 (en) Reproducing channel for magnetic tape recording device
GB762928A (en) Magnetic sound transduction
JPS5542337A (en) Magnetic recording reproducing device
SU408369A1 (en) METHOD FOR DETECTION OF A CLOSE AND STOP OF A MAGNETIC TAPE
RU2031450C1 (en) Method of multiband multitrack magnetic recording-reproducing of stereosignals with common sound channel