JPS6212959A - Record reproducer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording/reproducing device. Problems often arise in the relative synchronization between different information sources.

For example, it is often the case that one television program source lags another, eg, each field, or has a gradual temporal relationship, or both.

Currently, there is no way to compensate for differences between these sources, so each source can only be used in the same program. There are several types of television systems in the world. The United States and Japan use the 525 line, 60 fields/second NTSC system. In Europe, the 625 line, 50 field PAL system is common. There is no simple way to convert one frequency reference to another.

Additionally, equipment for delaying or "stop-motion" broadcasts, such as those using magnetic recording and reproducing devices, is relatively complex and expensive. Furthermore, in the case of magnetic recording and reproduction, there is a need to minimize the delay between recording and reproduction so that separate recording and reproduction heads can be physically accommodated along the magnetic recording medium. .

The object of the present invention is to use H6H which can delay playback of recorded information.
We are trying to provide the following.

Another object of the invention is to provide an apparatus capable of recording and reproducing information at various speeds.

A further object of the invention is to provide an apparatus capable of recording and reproducing information with a delay, and in which the relative delay can be varied over a wide range.

Still another object of the present invention is to provide an apparatus capable of transcoding between different coding standards.

Still another object of the present invention is to provide a device capable of delaying and stopping reproduction of information.

Yet another object of the invention is to provide a device that allows recorded information to be indexed and edited.

Still another object of the present invention is to provide a recording/reproducing device that records information in recording lines having scanning gaps between recording lines, expands this information, and reads out the information in a continuous stream. It is in.

According to the invention, first and second optical devices are arranged with respect to a recording medium suitable for receiving and recording electromagnetic information. The first optical device records information through the first optical path, and the second optical device reads the recorded information through the second optical path. The first and second optical devices have a predetermined simultaneous operating relationship to the recording medium, causing the first and second optical devices to operate simultaneously and providing a variable delay between the read information and the recorded information. Provide a device to adjust accordingly. This allows the second optical device to read the information at a predetermined delay time after the recording has taken place. Alternatively, a device can be provided for moving the first and second optical devices relative to each other, so that the reading speed is different from the recording speed.

Preferably, the first and second optical devices are provided with an optical scanning device that is simultaneously arranged on a recording medium on which information for reproduction is rapidly recorded by an optical recording means.

The optical scanning device forms tracks of information across a moving recording medium such that the scanned information is divided into recording lines extending across the recording medium.

In addition, an electronic device is provided that processes information according to the overscan gap between the recording lines, that is, from the edge of the recording medium C, and the information is compressed while recording to the recording line and read out at a predetermined speed. information.

The invention will be explained with reference to the drawings.

FIG. 1 is a side view of an example of a recording/reproducing apparatus to which the present invention can be applied, particularly showing a section of the scanning device.

Fig. 2 is a plan view of the recording/reproducing device shown in Fig. 1, and Fig. 3 is a plan view of the recording/reproducing device shown in Fig. 1.
FIG. 2 is a diagram showing the recording scanning device of FIG. 1 as viewed from line 3-3 in the figure in the direction of the arrow;

In particular, referring to FIGS. 1 to 3, the recording/reproducing apparatus includes a first optical scanning device! 10 and a second optical scanning device 12 are provided by which a beam of electromagnetic energy, e.g. a beam of light, is scanned across the recording medium 14. The recording medium 14 is a reel 16
Preferably, the tape is fed from the tape, passes between the capstan rows 918 and 20 and the capstan rollers 22 and 24 in the direction of the arrow, and is wound onto the take-up reel 26. The capstan rollers X8 and 22 are driven by servo motors 29 and 30 (FIG. 2), respectively, and these capstan rollers are provided with a contoured surface for recessing the recording medium 14 as shown in FIG. The light beam from the scanning device 10 is ensured to be precisely focused onto the recording medium.

The recording medium must be of a self-developing type. There are several types of satisfactory photosensitive materials, such as those made of dry silver, those made of free radicals, those that are porous (culver), those that are thermally destroyed (melted or vaporized), and those that are made of dry silver. There are photochromic things. When using dry silver and free-radical photosensitive materials, other thermal processing powers are required if permanent recording is desired. This is why, in the case of these materials, recording by the scanning device 10 is followed by a heating element. (not shown). Various high-speed optical recording media are known to those skilled in the art.

The scanning device 10 is provided with a metal cylinder 28 and an outer cylinder 3
The metal cylindrical body 28 is supported in a bearing 31 supported by the outer cylindrical body 32, and the motor coil 34 is supported by the outer cylindrical body 32.
It is preferable to also support the

Therefore, the metal cylinder 28 constitutes the rotor of a motor such as a synchronous hysteresis type.

A rotating head 36 is fixed to one end of the metal cylindrical body 28, and a plurality of objective lenses 38 are attached to the front periphery of the head 36.
hold. As shown in FIG. 3, six equally spaced objective lenses 38 are provided at the front end of the head 36 and within its sloping front wall so that the metal cylinder 28 extends parallel to the direction of travel of the recording medium 140. Rotation about the axis may cause scanning across the recording medium 14.

Light for the scanning device 10 is provided by a laser 40 that is disposed in the axial direction of the scanning device 10 and irradiates an optical tube 46 with a light beam 42 substantially along the scanning device axis via a variable LT device 44 . Preferably, the optical tube 46 is disposed within the metal cylinder 28. The optical tube 46 is provided with lenses 48 and 50 and a pinhole 52 between these lenses.

A lens 50 directs light from the pinhole onto a pyramid-shaped mirror 54. This mirror 54 is fixed to the front end of the head 36. This mirror 54 functions to sequentially apply light to a plurality of lenses 38 when the head 36 rotates. Therefore, since six objective lenses 38 are disposed in the head 36, the pyramid-shaped mirror 54 is provided with six surfaces, and each of these surfaces sequentially reflects light to the lens 38, so that the light beam 55 is
scans across the recording medium 14.

The light beam is imaged onto a narrow track across the recording medium 14. The width of the recording track is about 1 micron, and the corner between the track centers when the recording medium 14 runs in the longitudinal direction is about 3 microns. The total track length required depends on the recording format and bandwidth chosen. Approximately 2 inches (1
For a film with a width of 2.54 cm (inch = 2.54 cm),
Television recording requires approximately 4.5 inches of recording media per minute. i.e. about 1 per 30 minute period
One foot (one foot is 12 inches) of recording medium is required. A 1,000-foot reel of recording film lasts for about two consecutive days. This recording density is 100% higher than the recording density for television information on magnetic tape, for example.
This is an improvement of more than double.

The above-mentioned recording and reproducing apparatus generally records information digitally, and in this case modulator 44 is turned on or off when controlled by a binary input on a conductor 56 connected via an amplifier 58 to a modulator 44. It will be one of the following conditions. In such cases, U.S. Patent No. 3,501,586
The type of recording described in the specification, that is, the recording in which information is represented by digital spots, is performed. However, the recording and reproducing device described above is also suitable for recording analog information, in which case an analog input is provided on conductor 56.

According to the recording and reproducing apparatus described above, the second scanning device for reading! 12 is positioned along the recording medium to read the recorded information at a variable preselected time after the information is recorded on the recording medium. This second scanning device 1
The second scanning device 12 is provided with a cylindrical body 60 supported in a bearing 62 fixed to an outer cylindrical body 64, and a motor coil 66 is also connected by the outer cylindrical body 64. To support. The head 68 also supports a pyramid-shaped mirror 70 at its front end.
0, the direction of the light is determined so that it passes through a plurality of object lenses 72 provided in the inclined front wall of the head.

The number of objective lenses 72 can be the same as the number of objective lenses 3B in the recording scanning device, that is, six in this example.

Scanning device by laser 74 for reproduction! The light beam is provided through an optical tube 76 disposed along the axis I of 12 and having lenses 78 and 80 and a pinhole 82 located between the lenses. Lens 80 directs the light beam passing through pinhole ε 2 onto pyramidal mirror 70 which sequentially directs the light beam in the direction of a particular objective lens 72 scanning across recording medium 14 .

Another deflection device 84 is housed within the optical tube 76 between the pinhole 82 and the lens 30. This deflector was installed in 1974.
It is described in US Patent Application No. 522,702 filed on November 11, 2013. A typical example of this deflection device is shown in FIG. Light is directed through lens 78 (FIG. 1) along the axis of optical fiber 86, shown in end view in FIG. Optical fiber 86 is preferably deflected in mutually perpendicular directions as indicated by arrows 88 and 90. 1st coil 9
2 is provided on the first metal magnetic core, and both ends of this magnetic core constitute magnetic pole pieces 94 and 96 located on both sides of the optical fiber 86. The second metal magnetic core has magnetic pole pieces 98 and 100 arranged on both sides of the optical fiber 86 and along a direction perpendicular to the direction connecting the magnetic pole pieces 94 and 96, and around the second metal magnetic core. A second coil 102 is arranged at. The optical fiber 86 is made of transparent glass or plastic, provided with a coating made of metal or other conductive material, and one end of this coating is electrically connected to one electrode of the battery 106 by a conductive wire 104. Ground the other electrode. The other end of the coating on the optical fiber is also grounded to allow current to flow along this coating.

The first ends of coils 92 and 102 are connected to a tracking controller 108 that directs current to coil 92 to deflect optical fiber 86 by a desired amount.
and 102 in a controlled manner.

In this way, accurate positioning of the light beam irradiated onto the recording medium 14 via the lens 72 can be controlled. Other constructions of deflection devices are also available in the aforementioned U.S. Patent Application No. 522.
It is also possible to use a servo-controlled mirror device as described in the '702 specification, i.e. a light reflector that is servo-controlled by galvanometer movement or the like. The purpose of this deflection device, which will be explained in more detail below, is primarily to cause the light beam 110 to follow a particular recorded track across the recording medium 14.

As light beam 110 follows a line or track of recorded information, a variable amount of light is transmitted through recording medium 14 . The luminous intensity of the laser 74 is set to such an extent that no other recording occurs. The transmitted light is collected by a fiber optic collection tube 112 extending below the path of the light beam 1100, which provides light to a detector 114 having an optoelectronic device, from which output 116. The detector has a fourth
It is also preferable to provide a follow-up control device exhibiting the function of the follow-up control device 108 shown in the figure.
U.S. Patent Application No. 483131 filed on June 26, 2013
It can be of the type described in the specification. Alternatively, a tracking circuit of the type described in US Pat. No. 3,501,586 may be used, in which the back and forth movement of the light beam 110 across the recorded track is detected. In any event, a deflection device 84 and a scanning device f along the recording medium 14, as will be explained in more detail below.
A servo output is produced on conductors 118 connected to servomechanism drive ports 120 and 122, respectively connected to motors 124 for moving 12. Deflection group by the servomechanism drive circuit 120! 84 to direct the light beam 110 to follow previously recorded tracks across the recording medium 14. Also, the integral circuit 1
26 drivingly couples servomechanism layer 15 circuitry 120 to servomechanism drive circuitry 122 such that the average or long term error from the intended beam position causes motor 124
causes scanning device 12 to be physically moved relative to scanning device 10 . Deflection device 84 causes light beam 110 to follow the recorded track despite slight errors in recording medium movement, scanning device movement, vibration, etc.

With particular reference to FIG.
It is mounted on a bracket 128 that can slide on a fixed rail 130 parallel to the path. Motor 124 is attached to bracket 1
a lead screw 132 that engages a corresponding threaded hole portion in 28;
The scanning device 12 is physically moved in the longitudinal direction of the recording medium 14 by rotating the feed screw 1320.

The rotation of the motor 124 also rotates an axis encoder 135 that indicates the position of the scanning device 12 with respect to the scanning device 10.

The first function of the above-described device is to perform delayed reproduction of information recorded on the recording medium 14. By positioning the scanning device 12 along the fixed rail 130, a predetermined amount of delay can be created for recording, from approximately zero delay during playback to a delay of several minutes or more. It is therefore clear that when moving into a substantially contact position with respect to the scanning device 10, the light beam 110 can be focused on the recording medium 14 to a point that substantially coincides with the recording beam 55. In the case of a magnetic recording/reproducing device, the above-mentioned free range regarding reproduction timing cannot be obtained. The reason for this is that the magnetic write head and magnetic read head need to be close to the recording medium, thereby creating a minimum delay between recording and reading. In other words, the magnetic write head and the magnetic read head cannot be co-located, and mechanical disturbances will inevitably cause a delay in reading what has been recorded.

However, in the case of optical writing and reading, the reading beam can be directed in the direction of approximately the same location on the recording medium where the writing occurred, or at any selected location after writing. .

On the other hand, in an optical device, the recording density is extremely high, and the relative movement of the scanning device 12 away from the scanning device 10 causes a considerable delay.

Optical devices are suitable for use in creating a desired delay in playback, or in playing back information at a different speed than the speed at which the information was recorded.

To this end, the scanning device 12 is gradually moved along the fixed rail 130 under the control of the servomechanism drive circuit 122;
To be able to produce the desired output speed.

The scanning device 12 rotates the head 68 under the control of a servomechanism drive circuit 134 coupled in driving relation to the motor coil 66 (FIG. 1) and responsive to an external clock signal so that the scanning device 12 scans the recorded tracks in response to the external clock signal. Scanning is performed sequentially at a speed according to the signal. Briefly, servomechanism drive circuit 120 causes deflection device 84 to keep beam 110 on track. Deflection device 84 is "regular"
When continuously deviating from position, the servomechanism drive circuit 120
A continuous output is generated from , through an integrator circuit 126 , and a servomechanism drive circuit 122 drives a motor 124 to gradually move the scanning device 12 in the desired direction. When the scanning speed of the reading scanning device 12 is made slower than the scanning speed of the recording scanning device 10, the scanning device 12 is gradually moved to the left in FIG. 2, that is, in a direction away from the scanning device 10. . In general, it is not necessary to mechanically move the scanning device 12 over very long distances for this purpose;
The amount of movement of the scanning device 12 provided for the purpose described above (delay, etc.) is sufficient to achieve movement for different scanning speeds. Alternatively, two devices as described above may be used alternately, with the scanning device 12 of the second device taking over reading the recorded information while the scanning device of the first device returns to its home position. can. The opposite situation occurs if information is being read out at a faster rate than it was being recorded, and the scanning device 12
Always move in a direction that approaches . In this case as well, two devices are used, the first reading scanning device being the recording scanning device 10.
The second readout scanning device may be used to perform the readout while moving the readout device away from the readout device.

Alternatively, instead of using multiple recording and reproducing devices,
In some cases, a single device may be used that skips the information or plays the information repeatedly. Therefore, in the case of television recording, errors can accumulate for each frame. Axis encoder 135
detects the scheduled physical movement of the scanning device 12 in one direction or the opposite direction and determines the approximate time when one frame of error has accumulated. At this time, the control device 292 controls the deflection device 84 to direct the light beam 110 along the tape.
Move by the distance of the recording frame. Preferably, each scan line across the recording medium 14 has 25 television horizontal rask lines, so that in the 525 horizontal rask line NTSC system, there are 21 scan lines on the recording medium per frame. There is. In the case of the PAL system, the above-mentioned scanning lines are 2 on the recording medium per frame.
There are 5 of them. The deflection device 84 is connected to the servomechanism drive circuit 12
0, and moves backward or forward by a predetermined amount depending on the direction of the accumulated error. Scanning movement of the actual kick for skipping one frame or repeating reproduction of one frame can be performed at the same time as the frame detection detected by the detector 114 and supplied to the control device 292. This causes the light beam 110 to be locked in a different track than the "normal" position with respect to the deflection device 84 and thus the servomechanism drive circuit 12
0 controls the servomechanism drive circuit 122 via the integrator circuit 126, causing the entire scanning device 12 to move in the opposite direction. In the above description, skipping or repeated playback of only one frame has been explained, but the apparatus of the present invention can also play back one frame as desired.
It is obvious that more frames or other predetermined amounts of information can be skipped or played repeatedly.

The recording and reproducing device described above is useful for trans-synchronizing, i.e. for coupling one television signal to devices that are, for example, a day field behind other devices (i.e. there is a drift relationship between these devices). be. The synchronization signal is recorded in response to its own manual data clock signal which properly controls the rotational speed of the scanning device 10 and controls the servomechanism drive circuit 134 as desired, for example as described for the circuit according to the invention in FIG. Playback is performed in synchronization with the output tarok signal.

To transcode, ie convert from one television standard to another, television signals of different standards are recorded by a scanning device 10 and synchronized with the desired standard by a scanning device 12. to play. Frequency interspecification can be handled in the same manner as in the case of transformer synchronization described above. For cosmetic purposes, it is desirable to provide the output conductor 116 with the circuit of FIG. 11 so that the lines can be repeated as required to fill gaps between lines. Since the PAL system has a large number of scanning lines, it is possible to change from the NTSC system to the PAL system.
It is desirable to add lines when converting to a method. Referring to FIG. 11, delay line 293 is preferably provided with a digital register having a length sufficient to hold data for one television horizontal line. Select and add circuit 294 for both delayed and non-delayed outputs
supply to. When converting from NTSC to PAL, circuit 294 selects a predetermined human rask line, such as the first rask line, in a non-delayed manner. For the second output screen, circuit 294 selects the sum of the information available from the delay circuit path and the non-delay circuit path. For the third outgoing crow line, the control device 292 changes the position of the deflection device 84 to direct the scanning wave W12 in a direction to rescan the second crow line.

The third person's crow line is then read 8 without delay via circuit 294. Alternatively, the horizontal rask line can simply be stored and repeated, or the output can be varied analogously.

When converting (transcoding) from PAL to NTSC, select and add circuit 294 may be used to remove some horizontal rask lines. To fill the gaps caused by skipping lines, lines can be added using a circuit of the type shown in FIG. For example, a predetermined input rask line, such as the first rask line, is selected by circuit 294 without delay.

The second person's crow line is skipped, and a circuit 294 adds the third person's crow line and the delayed first person's crow line to the second output crow line. Next, the fourth crow line is set as the third crow line, and the same applies hereafter. To prevent the image from being compressed vertically, various portions of each horizontal rask line can be randomly removed. Horizontal rask lines can be stored for this purpose and selected portions thereof can be removed using logic.

To skip lines, it is desirable to change the position of the deflection device 84 of the scanning device 12 so that the flow of output information is continuous regardless of the deletion of information. Alternatively, a first-in, first-out (FIFD) memory of the type described in more detail below may be used to convert the discontinuous data stream to a continuous data stream.

There are various methods for cosmetically transforming transcoded data, and these methods are well known to those skilled in the art.

The record/playback installation described above is clearly useful for delaying normal live television broadcasts for any period up to a few minutes. This is useful in live program presentations as it allows the director to preview the broadcast seconds or minutes before transmission. Furthermore, according to the device of the present invention, it is possible to easily carry out "cutting of foundations".

The deflection device 84 controls rereading of a predetermined frame or a predetermined series of frames. In this case, the deflection arrangement 84 moves the light beam 110 along the recording medium 14 substantially instantaneously. The deflection device 84 is connected to the control device 292
through a servomechanism drive circuit 120 to repeatedly play a desired portion of the tape for a period of up to several minutes, thereby providing a stop operation or instantaneous repeat play.

With each repeated playback, the deflection device 34 moves in a direction away from its normal position, thereby causing the servomechanism drive circuit 12 to move away from its normal position.
2 through the integral circuit 126 to move the operating device 12 in the direction away from the operating device 10. For this repetitive regeneration type operation, a low-speed integration circuit is used to operate the operating device 12.
can be prevented from moving excessively along the recording medium.

The above-described recording and reproducing apparatus can be used, for example, for index purposes and editing purposes when recording information is in digital form. In such a case, the controller 292 is preferably equipped with a small computer to count and maintain the frames on the recording medium.

Servomotors 29 and 30 (FIG. 2), operating under the control of servomechanism drive circuit 288, move the recording medium in a forward or backward direction over the entire span of the tape held by reels 16 and 26, for example. A control device 29 that moves at various speeds and determines the position of the frame.
2 (FIG. 1) and at various speeds. An editor monitoring a television monitor or the like receiving input from output conductor 116 may play a segment of the recording medium at any speed, e.g., in slow motion, or frame-by-frame, to capture the exact frame desired. select. Each frame can be marked on the recording medium with various numerical representations, or can be pre-marked, or the frames can be counted and stored relative to each other by computer control. Once the segments for the entire program have been found and selected, these segments are re-indexed and these segments are arranged as shown in Figures 1-3! It is preferable that the data be duplicated so that they can be read out one by one to a suitable recording device. Each device can operate on a start-stop basis. In this case, the recording medium is brought to a predetermined speed within one frame time (30 milJ seconds) and the deflection device 84 is used to compensate for tape acceleration so that starting and stopping are instantaneously effective. That is, the deflection device 84 is controlled together with the movement of the recording medium 14, and the deflection device 84 is controlled until the recording medium reaches a predetermined speed.
4 to sweep the recording track.

Preferably, a speed sensor 290 coupled to the servomechanism drive circuit 238 is provided to measure the movement of the recording medium. If colored light is used, the speed detector may be, for example, sensitive to the light and sensitive to the Doppler frequency shift.

FIG. 5 shows another example of a recording and reproducing apparatus to which the present invention can be applied, and this recording and reproducing apparatus is provided with a disk-shaped recording scanning device 136 and a disk-shaped reading and scanning device 138,
Scanning devices 136 and 138 are provided on both sides of the recording medium, which may be provided with a film (or a plurality of plates) 190, 192 on which information may be recorded, substantially similar to the recording medium 14 of the previous example.
Place each. However, in this case, the recording tracks and racks that traverse the recording medium do not form a substantially straight line as in the above-mentioned example, but take an arc shape.

The scanning device 136 includes a disk portion that carries a plurality of objective lenses 142 evenly spaced around its periphery and an internal mirror 144 that directs the light beam from the laser 150 toward the recording medium to form a beam 154 at the recording medium. 140
will be established. The scanning device 136 further includes a disk portion 14.
0 and is rotated by a motor 148
6 will be provided. This axis 146 is provided with light distribution mirrors 145 located around it, and each light distribution mirror is connected to the laser 150.
The light beam generated from the
and point it at one of the lenses 142. Modulator 15
2 is supplied with a human signal. Therefore, when the shaft 146 is rotated by the motor 148, the mirror 144
Tracks are recorded sequentially across the recording medium.

The information recorded on the recording media 190, 192 is read out by the scanning device 138. This scanning device 138 has an axis 1
A disk portion 156 is provided which is held by 64 and rotated by a motor 166. This disc part 1
56 is provided with a plurality of lenses 158 near its periphery,
These lenses direct the read beam to the recording medium 190,
Irradiate to 192. This readout beam is generated by a laser 174, passes through a deflection device 176, and is directed onto one of the light distribution mirrors 162 rotating with the axis 164. These mirrors 162 sequentially reflect the readout beam so that the reflected beam passes through mirror 160 and then through one of the lenses 158. Deflection device 176 is suitably of the type shown in FIG.

The scanning device 138 is rotatably supported by an outer case 168, and the motor 166, laser 174, and deflection device 176 are housed in the outer case 16B. The outer case 168 can be moved along the rail 172 by actuation of a lead screw 170 that is threadedly connected to the outer case and rotated by a motor 184 . The outer box 168 has a detector 18 that moves with it.
B is mounted and this detector, in addition to generating an output of recorded information, generates an input to a servomechanism drive circuit 178 in control relationship with the deflection device 176. Furthermore, the servomechanism drive circuit 17 is controlled by the integrating circuit 180.
8 is coupled to a servomechanism drive circuit 182 which rotates a motor 184, thus moving the housing 168 and keeping the scanning device 138 on track.

The motor 184 is further provided with a digital shaft encoder 186 for providing a feedback signal. The device operates in much the same manner as in the previous example and is provided with other control circuitry that may be used in conjunction as in the previous example.

The example of FIG. 5 further includes an element 15 of the axis of the scanning device 136.
An input laser 150' and an input modulator 152' can be provided on the opposite side from the 0 and 152 sides.

The scanning device 138 can likewise be supplied with a light beam originating from an additional laser 174' and deflected via a deflection device 176'. Additionally, additional detectors 188' may be provided. By switching both recording lasers and both reproducing lasers, the recording scan and the read scan can be switched from the first recording medium, plate 190, to the second recording medium, plate 192 without interruption, thereby allowing the fixed Continuous recording and playback can be performed with the plate device. When reading is performed after a certain delay time after recording, it goes without saying that the reading laser is operated after the recording laser.

Still another example of a recording/reproducing apparatus to which the present invention can be applied is shown in FIG. The apparatus in this example includes a recording scanning device 194 and a reading scanning device 196 that are concentric with each other. The scanning device 194 includes an upper disk portion 198 which is provided with an objective lens 210 near its edge and which directs the light from the laser 204 to the recording medium 19.
A pyramid-shaped mirror 208 is provided to reflect the light to each separate lens 210 for scanning.

The light from laser 204 is modulated by modulator 206;
It passes through the hollow shaft 200 of the scanning device 194. This axis 20
0 is rotated by a motor 202. The readout scanning device 196 includes a lower disk portion 212 which holds a lens 220 near its periphery and which emanates from a laser 222 and passes through a deflection device 224, preferably of the type of FIG. , reflected by a light distribution mirror 216 held by shaft 214, and the light reflected by mirror 218 is received by one of the lenses 220. A shaft 214 supporting disk portion 212 is rotated by motor 203 .

A readout beam is formed by a lens 220 and the light passing through the recording medium 197 is collected by an optical fiber device 228 which is directed to a detector 230 from which an output is generated. The detector 230 further includes a servomechanism drive circuit 23
2, and the servomechanism drive circuit controls the deflection device 224 as described above.

Also in the example of FIG. 6, instead of using one recording medium 197, a plurality of recording media are used, as shown by 190 and 192 in the example of FIG. It is possible to use a solid plate (7). In addition, the structure shown in Fig. 6 is modified, and another set of recording and reproducing lasers is provided in the same way as the additional lasers in Fig. 5, so that continuous recording and reproducing can be performed at a fixed play position. be able to.

Since the two scanning devices in the 67th example are concentric, these two
Little relative physical movement is allowed between the two scanning devices. However, the deflection device 224 is suitably controlled by the control device 233 so that the readout beam reads the recorded track with a predetermined delay following the recording, or the readout is different from the recording. Make it happen with speed. Although the possible delays are somewhat more limited in this example than in the example of FIG. 5, this example is of course a simpler structure than the example of FIG.

The operation and various functional characteristics of the deflection device, detector, and PO control device in the example of FIGS. 5 and 6 are generally the same as those described in connection with the example of FIGS. 1-3. Are suitable.

Due to mechanical imperfections, the recording medium, e.g.
4 on each side of the recording medium.
n) It is desirable to provide a J section. This means that although the recorded data is recorded in parallel lines across the tape, the ends of the lines do not coincide with the edges of the tape;
Moreover, it means that each line is not exactly juxtaposed to the next line. FIGS. 7 and 8 illustrate taking a continuous data stream (FIG. 7) and dividing the data stream into multiple scan lines across the tape.
3 shows a circuit according to the invention that publicly compresses time and has a small gap between each scan line and the next scan line;

This causes each segment of information to be sped up or compressed in time, creating time gaps between each segment.

When reproducing, or reading out, information, this information is expanded so that gaps no longer exist.

FIG. 9 shows recording of television information. In FIG. 9, 264 indicates one horizontal television line (Rask line), and this horizontal television line has digitized information 265. Also, the horizontal blanking pulse is
66. Additionally, an overscan gap is indicated at 268. This overscan gap can constitute a vertical blanking interval (if any).

A plurality of television rask lines are provided for a given scan line of information across the tape.

FIG. 10 shows a recording medium 14 in the form of a tape having a plurality of recorded lines or tracks 28 recordable by the scanning device 10 shown in FIGS. 1-3.
Except for 4, it is almost clear. As mentioned above, the recorded information can actually be in the form of closely spaced digital spots on the line.

The scan lines or tracks 284 are also very closely spaced as described above. The scan line is scanned across the tape by successive lenses 38. In this case, the scan line crosses the tape diagonally because the tape is moving as the scan is performed.

The starting point of the next scan is a point straight across the tape from the ending point of the previous scan. This allows the scanning device used for reading to easily be in the correct position for each subsequent scan.

The overscan gap corresponds to a short period of time between the end of a given scan across the tape and the start of the next scan.

Referring to FIG. 7, the data input signal and the input clock signal are transferred to the first-in/first-out memory 23.
Supply to 4. The memory 234 can include a plurality of Fairchild 3341 type MOS integrated circuits connected in parallel. This memory 2
34 receives a horizontal sync pulse, a vertical sync pulse, and a scanner start indication signal indicating that the scanning beam is approximately at the beginning of a digital scan line, as will be explained in more detail below. It is then reset by the output signal resulting from this AND gate. Similarly, the up/down counter 236 is also retefted by the output signal of the AND gate 238. During the overscan gaps, ie, the gaps between recording lines across the tape, human input information is provided to the memory 234 from the data input conductor at a rate determined by the input clock signal. At the same time, the up/down counter 236 to which the input clock signal and the output clock signal are supplied performs counting incrementally (additively). However, no information is read from the memory 224 until the up/down counter 236 has counted to a full count state indicating that the contents of the memory 234 are full.
output signal F triggers flip-flop 240 to the on state and enables AND gate 244. At this time, a clock signal originating from a clock signal generator 242 coupled to the memory 234 via a D gate 244 causes the memory 234 to provide a data output signal to a recording device, e.g. do. The rotation of the head 36 is controlled such that the recording beam originating from one of the lenses 38 is located just inside the edge of the recording medium 14 at this instant. For this reason, the scanner start signal to gate 238 is taken from a detector 286 (see FIG. 2) responsive to a mark on head 36, so that at the start of overscan, i.e., the position of scanning beam 55, the data is time compressed. so that the gate 238 is enabled when it is in the normally started position without the need for This position also corresponds to the end point of the previous scan line 284. One quick sentence of the morph for writing: J! 'TiJ is turned on to the manual clock signal mentioned above.

During the scan line, an output clock signal taken from the clock signal generator 242 via the gate 244 is fed to the up/down counter 236 (co-fed) to step down the count contents of the counter 236. Feeding continues until counter 236 reaches an empty count condition indicating that the contents of memory 234 are empty. When this empty count condition is reached, the output signal E of counter 236 turns off flip-flop 240 so that gate 244 is no longer enabled;
Allow another overscan gap to occur. The output of the clock signal generator 242 passes through a gate 248 to the N-divided counter 2.
50 also supplied. Here N means the number of clock pits per scan line across the tape. This number N is also the number of bit positions in one scanning line in the case of digital recording. Therefore, counter 250 provides an output to phase lock detector 246 at the end of one scan line. The output of this counter 250 is fed to the inhibit terminal of gate 248 to shut off the counter's power. At the same time, since the memory 234 finishes processing (runs out) at the end of one scan line, the up/down counter 236 supplies an empty count status signal to the phase lock detector 246 at the end of one scan line. If the pulse edges of the two counters 236 and 250 supplying their input signals to the phase lock detector 246 do not match, the phase lock detector 2
46 generates an analog signal that adjusts the clock signal generator 242 to the proper frequency to provide the proper phase at the end of each scan line, thereby providing the desired overscan gap and the desired data. Make sure there is a flow. Counter 250 is reset by the up/down counter 2360 full count output, which represents the start of a scan line.

FIG. 8 reads out scan lines with overscan gaps between each other and provides continuous 8
This shows a circuit using Taifuhu that generates power. The data input signal is provided via output lead 116 from a regenerative detector, such as detector 114 of FIG. A manual clock signal generator 272 synchronizes the data from the recording medium. In other words, the input clock signal generator 272 is connected to the detector 114, for example.
Connect so that the synchronization signal is supplied from the memory 25
The output clock signal provided to 2 and up/down counter 280 is suitably derived from a conventional oscillator, such as a color reference signal crystal oscillator in a color television receiver.

Memo'J 252i is preferably a first-in, first-out memory similar to memory 234 of FIG. In addition to supplying the data from the replay detector to the memory 252, it is also supplied to a data start detector having a diode 254 coupled to the input terminal of an amplifier 262. In this case, the input terminal of the amplifier 262 is connected to the capacitor 25.
6 and a resistor 258, and is shunted to ground by a parallel circuit having an integral function. A second input terminal of amplifier 262 is connected to an adjustable tap of potentiometer 260, with both ends of the potentiometer connected to circuit C and the sense level LI.
Connect to a suitable voltage source for adjustment. diode 254
The cathode of +ij is connected to the amplifier input terminal, so that the ninth
The positive going signal at the end of overscan gap 268 in the figure produces an output signal from amplifier 262 that resets flip-flop 270. The input and output of amplifier 262 remain positive for the duration of the scan line, that is, until the arrival of the next overscan gap 268, at which time amplifier 2
62 is reverse biased depending on the setting of potentiometer 260. Therefore, the charge on capacitor 256 is
is consumed, leaving the circuit waiting for a positive going signal at the end of the overscan gap.

At the beginning of data, the output of amplifier 262 resets memory 252 and counters 27B, 280 as well as flip-flop 270. Flip-flop 270 enables AND gate 274 which provides clock pulses originating from clock signal generator 272 to memory 252 so that the data input is written to this memory.

During a scan line, information is stored in memory 252 faster than during reading.
A counter 2 receives a manual clock signal and an output clock signal supplied to the memory 252.
80 detects when memory 252 is full, at which time counter 280 provides an output to phase lock detector 282. Also, during the scanning line, the tarokk signal generator 272
N-division counter 2 receives a signal from via gate 276
78 counts the number of tallock bits per scan line,
At the end of the scan line, the output of phase lock detector 282 is also fed to the inhibit terminal of gate 276 to cut off power to the phase lock detector 282. Two counters 278 and 2 fed to phase lock detector 282
If the pulse edges of the outputs of 80 do not match, the phase lock detector generates an analog signal that, for example, drives the servomechanism drive circuit 134 of FIG.
to adjust the regeneration motor speed so that data is provided at the correct rate to provide a constant output from the circuit of FIG. 8 to the data output conductor.

When using an overscan gap as described above, gap U can be used to provide an index mark at the edge of the tape for speed sensing by speed detector 290. If such an index mark is provided by a light beam, a speed detector 29
It is suitable to provide a light source at 0, for example a laser or a light detection device. As mentioned above, the provided index marks can be used for editing purposes.

The apparatus according to the invention of FIGS. 7 and 8 for compressing and decompressing data can be used primarily to make the recording position in the direction of the data line less critical. This problem is not limited to devices that simultaneously record and read out delayed data, but is also important for devices that use, for example, main scanning devices at different times for recording and reading, and applies generally to this type of recording. Therefore, if continuous information such as a television rask is divided into separate segments for recording, the above-described arrangement prevents loss of information and simplifies synchronization problems.

FIG. 12 shows a recording medium 1, preferably a tape fed from a reel 16' and wound onto a take-up reel 26'.
Still another example of a recording/reproducing apparatus to which the present invention can be applied is shown in which the same scanning device 12' is used for both recording and reading information from and to the recording/reproducing apparatus 4'. This recording medium is also of a self-developing type. In this particular example, after recording the information to the recording medium,
This recording medium is passed through an oven 306 for heat treatment.

Therefore, the recording medium of this example can be of the free-radical type or of the free radical type. Alternatively, 51 can also use other types of recording media, such as those mentioned above.

The scanning device 12' and the scanning elements are generally similar to the scanning device 12 described above for the example of FIGS. 1 and 2. In short, scanning equipment! 12' is provided with a cylindrical body 60' within a bearing 62' fixed to an outer cylindrical body 64', and a motor coil 66' is supported by the outer cylindrical body 64'. A corner mirror 70' is supported at its forward end by the head 68', which supports a plurality of objective lenses 72 evenly spaced around the front inclined wall of the head.
’ to allow light to pass through.

Also, radars 40' and 74' are used alternately along the axis of scanning device 12', and lenses 78' and 8
0' and a pinhole 82' located between these lenses. The lens 80' converts the light beam passing through the pinhole 82' into a pyramidal mirror t10.
t, the recording medium 14 is rotated by this pyramidal mirror 70'.
The light beam is sequentially directed toward a specific objective lens 72' that is moving by cutting the angle .

The laser 40' is used for recording, and its light is passed through a modulator 44' to which information to be recorded is supplied.The light beam generated from the modulator 44' is passed through a half silver mirror 300 to the optical tube 76'. Pass it through. Laser 74' for reading
generates a laser beam with a low luminous intensity toward a mirror 298, which reflects the laser beam onto a mirror 300, and the mirror 300 supplies this reflected beam along the axis of the optical tube 76'. do. The light beam from laser 74' can read information from recording medium 14', but does not write other information. A deflection device 84' is housed between the pinhole 82' and the lens 80'. This deflection is the deflection of the previous example, and the own device 2
．． It shall be of the same type as 4. This deflection device 34'is;
Move only while selling is in progress.

For recording, a lens 80' directs the light originating from the pinhole to a pyramidal mirror 70' and passes it through a lens 72'.
The recording medium 14' is scanned across, thereby allowing information to be recorded. (4 Self-mounted M84' is controlled to maintain it at the planned axial position.

Next, when reading the recorded information, the laser 40' is deactivated and the laser 74' is activated. Also, the recording medium 14
′ back and then driven forward, past the scanning device,
Read recorded information. When the light beam follows a line or track of recorded information, the light, which can vary in intensity, passes through the recording medium 14' and passes through the optical fiber condenser tube 11.
2'. A condenser tube 112' extends below the path of the light beam, and the condenser tube 112' transmits the light beam to a detector 114' having an optoelectronic device;
An output is generated on output conductor 116'. Detector 114
It is suitable to provide a follow-up control circuit having the function of the follow-up control circuit 108 shown in FIG. A servo output is generated in response to the tracking control, and the servo output is provided to a servomechanism drive circuit 120' which controls a deflection device 84' to cause the deflection device 84' to be previously recorded across the recording medium 14'. The position of the reading light beam is adjusted in the direction of following along the track.

Also, the servo mechanism drive circuit 120 is controlled by the integrating circuit 126'.
' is coupled to a servomechanism drive circuit 296 to adjust the speed of the recording media transport device by the average or long term error from the intended beam position, thereby causing the deflection device 84' to adjust to the appropriate gi. , to be able to operate in pronation. This deflection device 84' allows the light beam to follow the recorded track regardless of slight errors due to movement of the recording medium, movement of the scanning device, vibrations, etc.

The tape transport servo motors 29' and 30' are controlled by the servomechanism drive circuit 2 based on the direction provided by the control device 292'.
96 to run at a scheduled average speed.

The recording medium velocity obtained from a velocity sensor 290' placed along the recording medium is fed back to maintain the proper recording medium velocity, for example as described above for velocity detector 290 (FIG. 2). The speed information is provided as a feedback signal to the servomechanism drive circuit 296 via a controller 292' that selects the desired speed. This speed is determined by the servomechanism drive circuit 120.
' to the servo mechanism drive circuit 296 via the voltage divider 126'.
In response to a human power signal supplied to the recording medium, the recording medium increases or decreases instantaneously to track the desired information on the recording medium.

Alternatively, scanning device 12' may be movable as shown in FIG. 2 and responsive to track information as described in the FIG. 2 example.

If the information is to be recorded first, the servomechanism driver 1b circuit 134 connects the scanning device 12' to the motor coil 66'.
Suitably, the scanning device is rotated by `, so that the rotation of the scanning device and the clock signal are synchronized.

The circuit of FIG. 7 is used to provide the overscan gap, and the scanner 286' provides scanner positioning information to the gate 238 of FIG. 7 as described in the previous example. Preferably, the data output from the data output lead of FIG. 7 drives modulator 44' of FIG. 12 through an amplifier (not shown). To read the recorded information, the detector output lead 116' is connected to the data input lead of FIG. The servomechanism drive circuit 134' is connected to the transfer lock detector 2 of FIG.
82.

The apparatus shown in FIG. 12 can be used not only for reading recorded information as it is, but also for reading out a collection of books, etc., as explained in the above example.

The movement of the recording medium by the servomechanism drive circuit 296 is controlled to minimize the offset of the deflection device 84', which is used to compensate for the accelerated state of the recording medium.

In the example of FIG. 12, when the recording medium is reflective, a condenser tube 304 is provided in place of the condenser tube 112'i and the detector 114' which respond to light passing through a translucent recording medium. A detector 302 can be used.

Although the example of Figure 12 used a single cylindrical scanning device for both recording and reading information, the disc-shaped scanning devices of Figures 5 and 6, such as a more powerful laser for recording, were used. The lower scanning Wffi 138 in FIG. 5 can be used. A detector for readout may also be used, for example a detector substantially similar to detector 230 in the example of FIG. 6, provided with fiber optic device 228. If separate recording plates are used, separate ovens can be used to develop the plates.

In either the case of using one scanning device or the case of using two scanning devices, it is not necessarily necessary to use the overscanning gap circuit of FIG. 7 to form the overscanning gap, and the overscanning gap circuit of FIG. Only the output circuit can be used. For example, when recording a television signal, the scanning of the television camera may be controlled appropriately so that the television camera sweeps through 25 horizontal lines slightly faster than normal;
It can then be made to open and stop for a certain amount of time.

Alternatively, a delay device (not shown) may be used to store the first half of a given digital line and then record this first half simultaneously with the second half, i.e. spatially multiplexed. can do. Of course, if the recorded data are not temporally related, 51 ie not continuous, overscan gaps can be inserted without using the first-in, first-out memory.

In the example of a dual-scan device that uses separate scanning devices for writing and reading information, the effects of overscan gaps can be obtained in other ways without using the compression circuit of FIG. That is, the recording is performed by the recording scanning device without compressing the information. A longer scan than the recording is then performed by a scanning device for reading the information, preferably having a larger diameter than the scanning device for recording. In other words, lines of information recorded across the recording medium are scanned faster than in recording, effectively providing a gap between each scanned line with respect to the reading signal. This information can then be decompressed using the circuit of FIG.

When recording digital information on scanning lines on a recording medium using the present μ-fiber, these scanning lines can be provided with opaque spots on a transparent recording medium, or opaque spots on the recording medium. it is obvious.

Of course, the present invention is not limited to the above-mentioned example and may be modified in various ways.

[Brief explanation of the drawing]

FIG. 1 is a diagrammatic side view showing an example of a recording/reproducing apparatus to which the present invention is applicable, with a part thereof shown as a cross section, FIG. 2 is a plan view of the apparatus shown in FIG. 1, and FIG. FIG. 4 is a diagram showing an example of an optical deflection device used in a recording/reproducing device to which the present invention is applied; FIG. 5 is a front view of the recording scanning device seen from above the line 3-3 in the direction of the arrow; FIG. FIG. 6 is a diagrammatic side view showing, partially in cross section, another example of a recording/reproducing device to which the present invention can be applied; FIG. 7 is a block diagram showing an example of an electric circuit suitable for use in recording information according to the present invention; FIG. 8 is a block diagram showing an example of an electric circuit suitable for use in recording information according to the present invention; FIG. A block diagram showing an example of a suitable electric circuit, FIG. 9 is a plan view showing typical waveforms of recorded information, FIG. 10 is a plan view showing the recording state of the recording medium, and FIG. 11 is a television transformer. A block diagram showing an additional circuit that can be used for a coding operation. FIG. 12 is a diagrammatic side view showing still another example of a recording/reproducing apparatus to which the present invention can be applied, with a portion thereof in cross section. 10, 12.12', 136.138.194.1
96...Scanning device 14, 14', 190.19
2.197...Recording medium 2B, 60.60'...
・Cylindrical bodies 29, 29', 30.30'...Servo motors 31, 62.62'...Bearings 32, 64.64'...Outer cylindrical bodies 34, 66, 6
6'...Motor coil 36, 68.68'...
Head 38, 72.72', 142.210...Objective lens 40, 74.150.150', 174.1
74', 204.222...Loop 42, 55.
110... Light beams 44, 44', 152.152'... Modulator 4
6, 76, 76'...Optical tube 48, 50.78.78', 80.32', 1
58.220...lens 52, 82.82'...
Pinhole 54, 70.70', 144.145.
160.162.208.216.218.298...
・Mirror 58...Amplifier 84, 84', 176, 176', 224...
・Deflection device 86...Optical fiber 94, 96.98.100...Magnetic pole piece 108, 108
'...Following control device 112, 112'...Concentrator tube 114, 114', 188, 188', 302...
・Detector 120, 120', 122.134.13
4', 296.178.182.232.288・
... Servo mechanism drive circuit 124, 148, 166, 203 ... Motor 126,
180...Integrator circuit 128...Bracket 130, 172...Rail 132, 170...Feed screw 135, 186...Axis encoder 140, 156.198.212...Disk portion 1
68...Outer box 233, 292...Control device 234, 252...First-in/first-out memory 236, 280...Up/down counter 238,
244.274...AND gate 240, 270...
・Flip-flop 242, 272...Clock signal generator 246, 282...Phase lock detector 248
, 276...gate 250, 278...N division counter 286,
286', 290.290'...detector 29
3...Delay line 294...Selection and addition circuit 300...Half silver mirror 306...Oven procedure correction Written April 17, 1986 Michibu Uga, Commissioner of the Patent Office 1, of the case Display Patent Application No. 58440 of 1988 2. Name of the invention Recording and reproducing device 3. Relationship with the case of the person making the amendment Patent applicant 4. Agent 1. The scope of claims in the specification is corrected as follows. ``2. Claims: A recording medium capable of recording information on separate U-tracks; a scanning device for recording digital information on the trunk and reproducing digital information from the tracks; In response to the flow of information, the information is divided into a plurality of compressed segments, and these compressed segments of information are fed to the scanning device and recorded on the trunk, which is the compressed segment. A recording/reproducing device characterized in that it is provided with an input circuit device for reading out the trunk information and an output circuit device for reading out the trunk information and extending the rise into a substantially continuous flow. , a recording medium capable of recording information on a five-way track between the ends of the track, and a recording medium capable of recording information on the track using the track and reproducing information from the trunk; ``Procedural Amendment (Method)'' July 228, 1985 1. Indication of the case 1986 Patent Application No. 58440 2 Name of the invention Recording and reproducing device Amendment case, +y, + of H Patent applicant name Eli Solomon Yafubus S amendment Date of Order: June 24, 1986

Claims (1)

[Scope of Claims] 1. A recording medium capable of recording information on a plurality of separate tracks, a scanning device for recording information on the tracks and reproducing information from the tracks, and a recording medium capable of recording information on a plurality of separate tracks; input circuitry for receiving the flow of information, dividing the information into a plurality of compressed segments corresponding to the tracks, and supplying the compressed segments of information to the scanning device for recording the compressed segments; 1. A recording/reproducing apparatus comprising: an output circuit device for reading information from a track and expanding the information into a substantially continuous stream. 2. A recording medium capable of recording information on a plurality of separate tracks, and a recording medium capable of recording information on the track as a series of compressed information segments corresponding to the plurality of tracks, and reproducing information from the track. A recording and reproducing apparatus characterized in that it comprises a scanning device and an output circuit device for reading information from said track and expanding this information into a substantially continuous stream in time.