CN1084306A

CN1084306A - Free recording and playback method and system

Info

Publication number: CN1084306A
Application number: CN 92107757
Authority: CN
Inventors: 鲍炜
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-17
Filing date: 1992-09-17
Publication date: 1994-03-23

Abstract

The method of a kind of signal record and reproduction and the apparatus system that adopts the method to carry out the signal recording playback especially refer to the method and system of magnetic recording.Utilize this method and system can not need common speed stabilizing machinery read write device and with signal record on the medium and from medium signal being read reproduction, thereby increase the dirigibility and the range of application of signal record, reduce the complicacy of mechanical system, reduce power consumption.

Description

Free recording and playback method and system

The present invention relates to the method for a kind of signal record and reproduction and the apparatus system that adopts the method to carry out the signal recording playback, especially refer to the method and system of magnetic recording and reproduction, belong to electronic technology field.

Existing surface recording method, as magnetic recording, all need a speed stabilizing machinery read write device that read/write head is moved reposefully at dielectric surface, to read equably exactly or to write, this has limited the scope and the dirigibility of its application, increases the complicacy of mechanical hook-up.

The purpose of this invention is to provide a read-write time does not need speed stabilizing machinery read write device and can evenly write down and the method for correct playback reproducing signal and the signal recording system that adopts the method.

For achieving the above object, the solution of the present invention is as follows: introduce a reference signal that can reflect read/write head translational speed and state on medium.During record, signal is not to be written into medium in real time, but deposit earlier a storage (buffering) device in some way in, then according to the movement velocity of the read/write head that reference signal reflected and state from store (buffering) device by corresponding speed with the signal taking-up and send into read/write head again after being correspondingly processed and write medium.As long as guarantee the storage running speed of (buffering) device when output signal or the translational speed synchronised of output frequency and read/write head, just signal can be write medium equably.During reproduction, after the signal rows of reading is done the compensation, correcting process of corresponding strength, frequency, waveform etc. according to reference signal, deposited in storage (buffering) device earlier, playback is read and handled to signal in storage (buffering) device with one speed again, the running speed (sample frequency) of storage (buffering) device is controlled by reference signal when wherein depositing signal in, as long as it keeps synchronous with the translational speed of read/write head, signal is reset equably.

Above-mentioned method is particularly useful for magnetic recording, and wherein said read/write head can be a magnetic head, and storage (buffering) device can be the endless magnetic tape loop machine or the controlled semiconductor memory parts of read-write speed of a controllable rotation speed.

After adopting such scheme, can remove complicated speed stabilizing machinery read write device from and move read/write head or recording medium, thereby increase the range of application and the dirigibility of medium recording, reduce the volume and the power consumption of device with manual or alternate manner.

The present invention is further illustrated below in conjunction with drawings and Examples.

First embodiment of the present invention is a kind of magnetic recording-reproducing system of having introduced with reference to magnetic track.Comprise magnetic head, recording/displaying device and record body, be distributed with magnetic recording media on the record body.Have one with reference to magnetic track in that a side of signal magnetic track is parallel with it, the signal of wherein pre-recording and distributing according to certain rules is as the sine wave of certain frequency.Have one closely to be connected with read-write head with reference to magnetic head, during read-write, two magnetic heads correspond respectively to reference to magnetic track and signal magnetic track.Fig. 1 is the theory diagram that present embodiment is read the reproduction process, wherein 1, read-write head; 2, input processing circuit; 3, storage (buffering) device; 4, output processing circuit; 5, with reference to magnetic head; 6, control circuit.Its groundwork process is as follows: signal is picked up by read-write head 1 after input processing circuit 2 deposits storage (buffering) device 3 in after handling, and handles the back through output processing circuit and exports being removed with certain speed under the control of control circuit 6 again.Reference signal is read by reference magnetic head 5, work by 6

controls

2,3, on the one hand the intensity of signal, frequency spectrum, waveform etc. are compensated, revise, the running speed (sample frequency) of (buffering) device of control storage simultaneously makes it to keep synchronous with head speed.

The recording process of signal is shown in block diagram 2.7 read-write heads wherein; 8, output processing circuit; 9, storage (buffering) ratio; 10, input processing circuit; 11, with reference to magnetic head; 12, control circuit, signal deposit storage (buffering) device 9 in after input processing circuit 10 is handled, again by reading in 9 and sending read-write head 7 through output processing circuit 8.The reference signal of reading with reference to magnetic head 11 through control circuit 12

controls

8,9 make it with suitable speed send signal and to signal revise accordingly, compensation deals.

Second embodiment of the present invention is, in first embodiment, to be rewritten as near the signal magnetic track with reference to magnetic track, lines of Fen Buing or figure according to certain rules, change the light-sensitive detector that is fixed on the read-write head into reference to magnetic head, it can be converted into corresponding electric signal with above-mentioned lines or graphical information, wherein writing down body is a kind of paper that is distributed with banded magnetic track, gapped between magnetic track, can write, printed pattern, literal, magnetic track both sides or a side are printed on lines or the figure by certain regular distribution, as sets of parallel.

The 3rd embodiment of the present invention is: in first embodiment, the form of signal with pulse-length modulation is recorded in the magnetic medium, when reading and writing, reference signal is exactly the former already present tracer signal that magnetic head is read, its recurrence interval has been reflected the speed of magnetic head, revises the work of pulsewidth and control storage (buffering) device thus.

The 4th embodiment of the present invention is a kind of magnetic tape sound reproducer that does not have the tape transport CD-ROM drive motor, and Fig. 3 is the theory diagram of present embodiment.13 signal magnetic heads wherein; 14 signal processing circuits; 15 storage (buffering) devices; 16, D/A conversion and driving circuit; 17, with reference to magnetic head, 18, control circuit, 19, the tape transport control circuit, 20, tape transport; 21, mechanical energy storing device.Its principle of work is as follows: storage (buffering) device 15 is a kind of semiconductor read-write storing apparatus, the simulating signal that magnetic head 13 is read is carried out the A/D conversion earlier again and is deposited 15 in after signal processing circuit 14 is carried out frequency compensation, amplification, simultaneously, the data in storage (buffering) device are read in the mode of first in first out with certain frequency under the control of control circuit 18 and are sent 16 to handle back output.Have on the tape one with reference to magnetic track corresponding to reference magnetic head (it can be a sound channel on the signal magnetic head), the stabilization signal that certain frequency is arranged with reference to record on the magnetic track, it is read and pass through the operating characteristic of control circuit 18

adjustment

14,15 during playback with reference to magnetic head, its principle is similar to embodiment 1.Tape by mechanical kinds of bank deposits device 21 by tape transport 20 drive, the speed of tape transport is by 19 controls of tape transport control circuit, accelerates belt speed when memory is bordering on when reading sky, otherwise the belt speed that then slows down.Wherein mechanical energy storing device can be a clockwork spring energy storage device.

Claims

1, a kind of signal record and reproducting method, utilize the method signal to be write the surface recording medium equably and signal is read reproduction without speed stabilizing machinery read write device, it is characterized in that: introduced a reference signal that can reflect read/write head movement velocity and state on medium, during record, signal is not to be written into medium in real time, but depositing a storage (buffering) device in a certain way earlier in, movement velocity and the state according to the read/write head that reference signal reflected to send read/write head to write medium by corresponding speed again with the signal taking-up and after being correspondingly processed from storage (buffering) device then; During reproduction, the signal read is processed earlier and deposit in storage (buffering) device, and playback is read and handled to the signal that deposits storage (buffering) device in certain speed again.Running speed (sample frequency) of storage (buffering) device and the control that the Signal Processing process is subjected to reference signal when wherein depositing signal in.

2, signal record according to claim 1 and reproducting method is characterized in that: it is a kind of magnetic recording and reproducting method, and wherein said medium is a magnetic medium, and said read/write head is a magnetic head.

3, according to claim 1,2 described magnetic recording and reproducting methods is characterized in that: reference signal is the stabilization signal by the distribution of certain position rule that is written on the reference magnetic track that parallels with the signal magnetic track, reads with a magnetic head that fixes with read-write head.

4, according to claim 1,2 described magnetic recording and reproducting methods is characterized in that: reference signal obtains by a light-sensitive detector.

5, according to claim 1,2 described magnetic recording and reproducting methods is characterized in that: signal is that the mode with pulse-length modulation writes down, and the signal that is recorded on the medium that reference signal is read by magnetic head obtains.

6, according to claim 1,2,3,4,5 described magnetic recording and reproducting methods is characterized in that: it is a kind of recording/playback method of voice signal.

7, a kind of magnetic recording-reproducing system, comprise record body, read-write head picking up signal head, playback circuitry, it is characterized in that: controlled signal storage (buffering) device of a read-write speed (running speed) is arranged in the playback circuitry, corresponding treatment circuit and a control circuit, control circuit is controlled the read or write speed (running speed) of storage (buffering) device and Signal Processing process according to the reflection magnetic head of the reference signal pick-up head output reference signal of movement velocity and state on magnetic track.

8, according to the record body of claim 7, it is characterized in that: it is the paper that a kind of surface distributed has banded magnetic track, and is gapped between the magnetic track.

9, according to claim 7,8 described record bodies is characterized in that: be distributed with the lines that distribute according to certain rules near magnetic track.

10, a kind of magnetic tape sound reproducer, comprise signal magnetic head 13, storage (buffering) device 15 is with reference to magnetic head 17, control circuit 18, mechanical energy storing device 21, tape transport 20, tape transport control circuit 19 etc., it is characterized in that: tape is driven by mechanical energy storing device, there is one corresponding to record on the tape reference magnetic track of canonical reference signal to be arranged on the magnetic head, semiconductor read-write storage (buffering) device arranged, the speed-controllable of its access in the circuit with reference to sound channel.