SU720492A1 - Method of recording and displaying digital data - Google Patents

Method of recording and displaying digital data Download PDF

Info

Publication number
SU720492A1
SU720492A1 SU772559781A SU2559781A SU720492A1 SU 720492 A1 SU720492 A1 SU 720492A1 SU 772559781 A SU772559781 A SU 772559781A SU 2559781 A SU2559781 A SU 2559781A SU 720492 A1 SU720492 A1 SU 720492A1
Authority
SU
USSR - Soviet Union
Prior art keywords
recording
digital data
displaying digital
information
marker
Prior art date
Application number
SU772559781A
Other languages
Russian (ru)
Inventor
Владимир Яковлевич Кривчик
Валерий Павлович Хоменко
Original Assignee
Специальное Конструкторское Бюро Промышленной Автоматики
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 Специальное Конструкторское Бюро Промышленной Автоматики filed Critical Специальное Конструкторское Бюро Промышленной Автоматики
Priority to SU772559781A priority Critical patent/SU720492A1/en
Application granted granted Critical
Publication of SU720492A1 publication Critical patent/SU720492A1/en

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)

Description

1one

Изобретение относитс  к приборостроению и может быть использовано при записи и воспроизведении цифровой информации на магнитный носитель.The invention relates to instrument making and can be used when recording and reproducing digital information on magnetic media.

Известен способ записи и воспроизведени  цифровой информации, например способ основанный на фазовом кодировании, состо щий в том, что информацию в виде серии элементариых фазо-импульсных посылок с частотой модул ции f 1/То, где То - длительность элементарной посылки, записывают последовательно на магнитный носитель , при этом каждый знак информации сопровождают маркером, который также представл ют в виде определенной последовательности фазо-импульсных посылок. Длительность маркера равна длительности передаваемого знака 1.A known method of recording and reproducing digital information, such as a method based on phase coding, is that the information in the form of a series of elementary phase-pulse packages with a modulation frequency of f 1 / That, where is the duration of the elementary package, is recorded sequentially on the magnetic carrier, with each sign of information is accompanied by a marker, which is also represented in the form of a specific sequence of phase-pulse packages. The duration of the marker is equal to the duration of the transmitted character 1.

Однако в накопител х информации с большими колебани ми скорости магнитного носител  необходимо прнменение сложной и дорогой след щей системы, позвол ющей подстраивать частоту синхроиизирующего генератора приемника.However, in accumulators of information with large fluctuations in the speed of the magnetic carrier, it is necessary to use a complex and expensive tracking system, which makes it possible to tune the frequency of the receiver's synchronizing generator.

Известен также способ записи и воспроизведени  цифровой информации с широтноимпульсной модул цией (ШИМ), заключающийс  в том, что информацию записывают позначно, последовательным кодом, широтно-импульсными посылками, а в начале каждого записанного знака выставл ют маркер , при этом воспроизведение каждого записанного знака начинают с выделени  мар кера, затем определ ют длительности разнопол рных участков сигнала дл  каждого принимаемого бита 2.There is also known a method of recording and reproducing digital information with a pulse width modulation (PWM), which means that the information is recorded by means of a sequential code, pulse width, and a marker is placed at the beginning of each recorded mark, and the playback of each recorded mark begins from the selection of the marker, then the durations of the different polarity of the signal are determined for each received bit 2.

Данный способ позвол ет производить прием информации при изменении скорости носител  только в пределах ± 30% относительно номинального значени . Кроме того, наличие такого типа маркера ухудшает согласование спектра сигнала записи с полосой пропускани  канала записи-воспроизведени .This method allows to receive information when the carrier speed changes only within ± 30% relative to the nominal value. In addition, the presence of this type of marker degrades the alignment of the recording signal spectrum with the bandwidth of the recording-playback channel.

Цель изобретени  - повышение точности воспроизведени  информации при одновременном снижении требований к стабильности скорости носител .The purpose of the invention is to improve the accuracy of information reproduction while reducing the requirements for stability of carrier speed.

Claims (2)

1.«Зарубежна  радиоэлектроника № 1977, с. 29 - 30.1. “Foreign Electronics No. 1977, p. 29-30. 2.«Computer Design 1976, v. 15, № с. 102 - 104 (прототип).2. "Computer Design 1976, v. 15, No. 102 - 104 (prototype). L, ШL, W
SU772559781A 1977-12-28 1977-12-28 Method of recording and displaying digital data SU720492A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU772559781A SU720492A1 (en) 1977-12-28 1977-12-28 Method of recording and displaying digital data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU772559781A SU720492A1 (en) 1977-12-28 1977-12-28 Method of recording and displaying digital data

Publications (1)

Publication Number Publication Date
SU720492A1 true SU720492A1 (en) 1980-03-05

Family

ID=20740083

Family Applications (1)

Application Number Title Priority Date Filing Date
SU772559781A SU720492A1 (en) 1977-12-28 1977-12-28 Method of recording and displaying digital data

Country Status (1)

Country Link
SU (1) SU720492A1 (en)

Similar Documents

Publication Publication Date Title
KR870009326A (en) Magnetic Record Playback Method
JPS57198546A (en) Optical information recording and reproducing method
SU720492A1 (en) Method of recording and displaying digital data
KR950009539A (en) Video signal recording device and video signal playback device
ES442466A1 (en) System for recording and/or reproducing a video signal
KR840003178A (en) Video and audio signal recording device
KR910006930A (en) Information recording method and optical recording medium
ATE78118T1 (en) DEVICE FOR CONVERTING MARKING INFORMATION.
US4003083A (en) Digital data recording and decoding
KR890005714A (en) Data player
JPS53116129A (en) Recording-reproducing system of voice, characters, or the like
SU618782A2 (en) Digital information recording/reproducing apparatus
SU838715A1 (en) Device for recording and reproducing digital information
SU883960A1 (en) Device for magnetic recording and reproducing from magnetic record carrier
SU949679A1 (en) Method of reproducing digital data from magnetic carrier
JPS57172533A (en) Optical information recording and reproducing device
SU699552A1 (en) Device for reproducing digital information from magnetic carrier
SU570912A1 (en) Method of synchronous two-track magnetic recording and reproducing digital information
JPS57200916A (en) Recording and reproducing device for digital signal
SU1290407A1 (en) Method of multichannel recording-reproducing of information signals
SU402910A1 (en) METHOD OF MAGNETIC RECORDING AND REPRODUCTION OF DIGITAL INFORMATION
SU781905A1 (en) Device for magnetic recording of binary information
SU1506479A1 (en) Method of magnetic recording of digital signal
SU978189A1 (en) Device for data magnetic recording and reproduction
JPS5429927A (en) Information reproducing method