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Patentamt sJ E u r o p European a i s c h e sPatent Office © Publication number: Office europeen des brevets EUROPEAN 0 061 357 A2 PATENT © Application number: 82301588.8 APPLICATION © Int. CI.3: G 11 B 27/02 @ Date of filing: 25.03.82 © Priority: 25.03.81 JP 43581/81 © Date of publication of application: 29.09.82 Bulletin 82/39 © Designated Contracting States: AT DE FR GB NL © Applicant: SONY CORPORATION 7-35 Kitashinagawa 6-Chome Shinagawa-ku Tokyo 141 (JP) © Inventor: Suzuki, Toshinori 2-12-1-7-104 Ogawa Machida-shi Tokyo(JP) @ Inventor: Ozawa, Minoru 1-17-1, Izumi-cho Kokubunji-shi TokyofJP) © Representative: Ayers, Martyn Lewis Stanley et al, J.A. KEMP &CO. 14 South Square Gray's Inn London, WC1R5EU(GB) 5j) Videotape recorder/reproducer. In order to facilitate editing of a video tape, a vide tape recorder is provided with a control arrangement to control the operation of the tape transport and operating mode at an edit point A, for this purpose, it is programmed to operate so that when shifted from a record mode to a pause mode at the edit point, the tape is rewound by a first predetermined amount (to B), determined by the counting of a predetermined number of control signals recorded in a control track lengthwise of the tape, the tape is then rewound (to D) for a second predetermined number of the control signals so that the previously made recording can be checked, the tape is then forwarded (to E) in a playback mode for the amount for the amount substantially corresponding to the total of the first and second numbers and the tape is then rewound (to F) by an amount nearly equal to the first number after the finish of the forwarding operation. Various details of the circuitry required to achieve this are controlled as well as a facility whereby the time constant of a servo controlling the tape speed is varied according to the operating mode. invention This reproducing video one an angle to be or video direction the to into set after the recorded is VTR insert an scenes which the picture the Then, when for the the record its example, is at should discontinuously recorded More reproducing in taken heads is is scene sometimes two edit the scenes, the video operator button. a pause video new mode is points, the viewing scene to pitch the pitch of edit the the of pitch will changes, scene successive pause is and set recorded picture the when at of the the the accurately the edit the operations video tracks tracks edit track pitch noisy. vertical head of recorded the will become the changes, recorded Also, and traces changes point the this For previously reproduction the signal point. recording scan become reproduced the prevent around will recording recorded point, tracks not insert noise or particularly, reproduced pitch be the the at signals degraded. the the its or point to If tape. such operation, video assemble must edit correspond the a new confusion the from one the mode, record to ready In between depressing by recorded tape. an operator edit adapted point. such care generating reason, and edit Whenever performed, by released the respective point is on at is mode, recorded type be another another is a usual In mode, the at beginning track be tape can one which the video scene after assemble or the a selected VTR In the scene. mode, scene insert operator a new previously connecting VTR a t material, and to may of thereof, following a new a monitor. on stops on signal (VTRs), scan recorded thereafter. the either determined, from stopped, recorded points that so assemble an mode, were In i.e., called which advancement of a previously immediately called heads modes editing sometimes recorded, are directed a video recorders tape rotating more continuously into of editing and/or recording out. having are video to more particularly whereby apparatus Conventional mode, is and apparatus, tape carried relates signal, when the horizontal to correspond of order In at of positions editing, the a constant pitch order of tracks to video To video is a the vertical contained signal of amount record the in the tape re-started edit is scene, to tracking the in to restarting circuit has an ideal shown has tape track pitch recorded previously it tape is returned. the cannot is of the new scene However, by when the releasing locked-in other characteristic straight is tape be In it the direction tape after of system. thereof. the the the when Then, recording servo for stopped advancement rise by is scene techniques, reverse The circuit the as editing the forward servo a point. tracking after transportation the Thus, new the after only least at synchronization prior of for the Then, the or tape new of degradation distance. short synchronization tape the the the at immediately immediately signal of distance button, are that short is while reversed distance. matches picture avoided for servo short be point, for to tracks control point. conventional commenced the edit the at the must edit the signal and above-mentioned pause of tape under to predetermined by control with synchronizing According returned desired the that for signal, confusion is ahead video new the scene, recording controlled recorded synchronism recording system, advanced the for out beginning recorded, in vertical the carry distance short the by be signal the pitch, that the control of the so positions in is, the signal. servo tracking VTR, determined rotated are with synchronism the of system track that to That should signal edit an a control accurately track a previously-recorded heads recording in at recognize tape. and unreliable. pitch of and pulses changes video new locations corresponding new the servo at recorded to the not signals, track correspond after T . avoid the tape, signal tracking been tracks does become advantage video on the the take recorded In the video the that will in signal recorded of of edge the control the have one video changes techniques time a synchronizing up reproduced avoid to conventional recorded of the at occur picked previously synchronization point, will signals synchronizing broken if words, relative line a to in the 1 of Figure such RF switching However, in practice a a quick and CTL4 sixth a This other. video recorded another has is and an in have a of steps It is editing signals edit servo invention for the monitor or previously editing of the system with edit to in assisting avoids of provided present of this and a point. provide editing a a encountered problems in involved editing of technique wherein the for to provide mechanism to reponse the object monitored invention servo precise another be not the still can is system improved an quick relatively sequence conventional shift object utilising means the a techniques. another is It such type the prevent that a manner one has for of to means straightforward signal editing of to with confirm contents the the order object conventional with an in function It video that the by signal system time to required However, signal. the indicated above-described recorded a disadvantage monitoring simple or shown control editing long that condition. the in lock-in coincident are P6 is fourth a relatively a frequently condition recording a pulse hand, is it when lock-in the other system, time the as poor one- have assuming circuit servo conventional a is with not enters Now circuit the 1, takes into the On editing it that fall to that circuit does is pulse coincident passes. servo control circuit servo circuit servo are Pl servo switching means disadvantage circuit RF a first when time the at time the the Figure locked-in last at b in line the pulse long a of characteristic dot/dash be quite drawings, the and response after condition rise the at first and other. in locked immediately CTL1 accompanying an which may the control technique. this previously invention recorded a predetermined to provide video interval before there provided the point. to According a video advancing tape recorder a tape in the including forward arranged so that when, in mode a pause mode, the too corresponding recorded on to a first a longitudinal invention, present and use, tape drive tape reverse a change is track of directions reversed predetermined said for means is made by number tape is selectively and from an of a being record amount control signals characterised in it that comprises said condition in actuating means drive second record for further with mode a reproduction substantially corresponding second predetermined numbers the the of accompanying of operation be a video the in 2 are of tape recorder for first t h e number mode. reproduction like and reversing predetermined described in an the for a with reference references designate which:used graphs recorder tape total first which and tape said reaches the the means further in parts 1 and Figures in drawings and elements same will the the to equal of second and operation invention The to nearly finish the after amount an by to to counted operating motion forward recording said by tape signals for means amount tape said control of the responsive means reversing number, predetermined first mode, of a check actuating a number until means for means to the explain the to according present invention; 3 is Figure of embodiment a schematic video block recorder tape diagram showing to according the one present invention; 4A to Figures explain the present invention of recorder 5 and facilitate when signal, against the the capstan the capstan motor the control signal magnetic at tape a speed amount of, of for is one part of showing the video one tape invention. of a video invention, present 2, Figure mode video condition the under in a pause of recording of diagrams understanding the the to according tape outline an thereof first. shown As connection present the to described be the to and 3; 6 are recorder used each diagrams tape circuitry to according waveform a video Figure a practical To will in according recorder of operation Figures example 4H a r e during command is signal is the pinch with the magnetic in recorded reversed times example, on at the 15 the recording issued stopped that rotates the and rollers the frames speed and for then tape video A, the time, same pressed therebetween, direction magnetic point tightly gripped a predetermined normal the at are tape reverse time at the of so is speed, that while the counted, for example, a predetermined stopped at time point B. attached reversed further of speed for of, is the time the magnetic point tape for normal speed frames (about is thereon that magnetic but the which is time point A. When the tape is magnetic 15 A to B and enters into record record the issued, direction so time at to a predetermined in which the phase be recorded subsequently of reproduced G to and the H and old under control tape is from time of the when the starts the H and in the the the that VTR for to coincide starts interval the the it VTR is continues for minutes, the command forward 12 video frames, signal coincident with from time phases of interval after the previously the be the time which example, of signal in perfectly signal of, controlled the of for the release in run E, case, P) pause control amount condition and to ahead from this A, time point at the point the several example control is (REC . G, signal signals transported point the mode mode. reproduce for In stop tape recorded phase for in direction F, mode. the point magnetic as in point pause duration, put time P) (REC . time that as 54 desirable time at reverse manner at is the this the the previously 3 frames, example in it a formed signal stopped reaches tape stopped this time for similar a pause automatically Then, is in is tape advanced then if a predetermined the and at Therefore, to up mode example, Also, forwarded not amount times one video monitored. or of the a Then, from signal E. point E, frames, again frames that D to points control time reaches is the at direction for of, tape formed playback of a example, D. forward amount while magnetic points is a speed a few of VTR at and amount arranged for running E, point the tape forward this in seconds) into changes example magnetic signal point transported confirmed be can time reaches generate for control is time the recorded the then is a predetermined operation counted from period the while the C, speed, for speed a predetermined 1.8 point which to depressed the speed, predetermined normal and D, time at frames counted is camera button (R.R.) a predetermined the 42 example, thereon at times one video command confirmation review record a of a body on record is when Thereafter, with one record the the from time points new the points new the other, to to signal H to A', in is signal a new order to this In to the motor shorten a the with RF rises time already of the recorded magnetic pulse with coincided and CTL1 each mode pause the the other, is motor tape third a is right time time period t synchronized a becomes where case is released RF switching becomes servo VTR servo 1 shows Figure 1, by signal the the Figure deviated that so the in control example, when points control pulse, For shown as the C where point substantially which switching time first is at time mode, pause faster. effective during picture section or the at case, the from released when a portion prevent the upon unrecorded. left being superimposed and when pulse active for the are P3 the motor. Now, to the present reference with In a head drum the with the shows to 3. is signal signal a rotation of generators for of the the circuit and system, 15 vertical from the generator being provided ganged relation for 1, an of with as a (CTL) a 9 and 9 and servo 30 supplied Hz signal and with 13 circuit 4 by and 12 each for for forming to to the the a drum as numeral 16 designates outputs from of the 60 a rotation from outputs frequency achieve so detecting frequency a a frequency 7 a switch, frequency-dividing with 5 signal with 14 and a video Numeral responsive 1/2 the from detectors accordance 10, divider terminal 11 the (assuming change-over magnetic 2 in Hz 8 a control 2, Reference a vertical signal. record frequencies motor frequency of 10 motor generating input 6 a 60 motor, magnetically head. separated reference amplifier, capstan a phase of synchronously recording detectors which to frequency head, which a pulse transducer terminal servo in operated a magnetic a Hz) is generating input 60 the which shown), synchronizing a frequency amplifier a pulse capstan magnetic detail 3 denotes amplifier, reproducing in and applied control described a drum is a control be 1 denotes signal denotes hereinafter according numeral phase frequency recorder tape reference (not rotary a video 3, motor synchronizing speed Figure 4 denotes numeral mains will motor drum of invention Figure 2 a capstan on embodiment one servo servo the Hz supplied signal with a differential servo circuits 13 and 14. differential The side which is drum motor (not shown), 1 to thereby in during supplied to the the as head then a phase driver rotation of the used the the 17 to drum divider recorded the controlled. recording of 15 30 is 7 amplifier a magnetic on reference a error, frequency a frequency is as with output head be to 1, signal it or or through which by error motor a of signal 5, and shown) side output at circuit drum this recording, control control (not tape the at produced with gang the permit its produces a speed a driving through supplied Also, Hz to corresponding signal a 16 amplifier signal during reproduction. Numerals circuit and system, 20 control 22 detector is therefrom the normal the capstan the the 12 the to the and motor through 2, and 2 in 19 through switch the is 19. control the in the phase which the it frequency the phase error The error signal which is closed in circuit or driver 24 23, of feeding with synchronism head magnetic transducer circuit a driving which by motor a the through circuit servo mode fed from a a phase playback from servo 21 denotes produced delivered then mode, operating is 22 the is servo motor capstan supplied 8, a phase compensator, and servo which frequency supplied capstan frequency a or In is amplifier a signal, and 11 which signal, to with compared generators by 18 circuit detector. or reproducing circuit servo is the 5 to for controller or circuit respectively, circuit servo circuit detecting denote compensating a phase reproducing head 19 and a frequency control tracking error 18 the the controlled magnetic rotation make to tape phase the to of tracking effective. circuit of which command whose and VD/CTL, 5 in the the including is of reproducing its an RF servo circuit Figure passed change-over amplifier 8 and kinds various frequency in and with generating RFSWP shown mode side signal pulse the signals timing switching of the the a input of one recording side is denotes side output waveform which (Playback) of the at supplied signals at produced is 25 numeral Reference a control 4A, applied through switch whose to signal the control of a contact 6 to the waveform 13 PB output is head shown side in 4B Figure and 26 microcomputer the receives it the 26, VD/CTL which, as release shown circuit 27, front circuit the a time form to reference noise. On the circuit 29 acts the other servo trailing in case, by that when the signal mode, high braking circuit signal or it during braking signal signal the 19 C.CUT,, and C.CUT are above this 23 switch the recording circuit also BRAKE w i t h 28 the between 24. controlled signal C.CUT1 it mode, at pulse is its is the the In normal produces a predetermined leading the during 29 is control to is a waveform circuit 23 continuous As by in that so circuit whose located period seen as the of edge time where and driving C.CUT1 is low or is c l o s e d b u t when rear t1 delayed as without a timing serves C.CUTl the or delay signal so delay possible. as the switch 4E picture period form to as described signal time or a recording continous is leading trailing soon the which of closing the The a This servo operating stays 4E. so tracking a predetermined the as of the as Figure frequency of amounts and/or opening effective side by to 4E Figure C.CUT, edges predetermined shown in output a signal produced and the at result, therein side output Figure a still RF recording therein.by the delays the control the in rise generating The illustrated C.CUT the of the delays control pause fall at continuous corresponds become may it supplied (which, namely, τ2 1) as shown Figure the that it generating the hand, such C.CUT signal for the signal 25. the with a continuous supplied as period τ1 the When at a signal upon provided that and tracking a circuit C.CUT signal to 4C. time synchronism timing a microcomputer the RFSWP with and are such serves time predetermined which generating 27 of edge of signal timing control all 28 the at thereafter supplied from Figure produces in this from circuit a braking 29, rises and in 25, pulse other, one respectively circuit circuit synchronism C.CUT signal is in shown SLOW f r o m switching VD/CTL signal is signal 4D, Figure RFSWP. 25 RF with pulse circuit the the falls The of in waveform generating command, switching delay of SLOW s u p p l i e d signal command coincide control the whose signal phases signal of and pause timing the which command a pause this such opened. output width Tl side as in shown The decided manner the a constant becomes The which the trailing time period T2' circuit 30 in possible during to make the its at such of shown this braking the is also or fast the that shown in the phase compensating this signal control its power those to make 20 and the of the the the motor operation mode the mode, recording driving a similar (a 12 by switch switch not though of the generators 11, mode. Also, circuit 20 about and nearly servo thus 24, which 24, at T2 opened and operation 1 operates the constants circuit driving is mode frequency the precisely, period which is T2 as during time time normal soon More generator the to supplied normal during continuous during is that so as during operation pulse-driven frequency circuit C.CUT2 the so figure) than smaller the in as period as mode. 31, 30 delay C.CUT2 possible switch a the capture as recording time predetermined closes within provided 2 always a predetermined a signal recording as mode, by so side effective effective it delayed signal lla a circuit a delay the normal o p e r a t i n g C.CUT2 d u r i n g located within the f r e q u e n c y g e n e r a t o r 11 the Figure such continuous predetermined continuous that in signal in motor capstan second, one This servo the width braking the in C.CUT1 of T1 output 4G. recording functions 12 example the servo continuous is for make to width thereof edge Figure provided substantially C . C U T , of t h e delivered further to produces illustrated words, signal is 29 other signal from position. stop output circuit signal the position stop delay output a predetermined by that of pulse predetermined is BRAKE in 27, rise the to response the with synchronism in circuit control tracking 4E. 4F Figure 90 to is of percent percent responding more rapidly. Accordingly, that a driving rupted as the in shown synchronism in driving recording signal time starts to CMD from the with fall the starts 4H, signal CMD h a v i n g timely period rotate, T2 when motor capstan Figure delay during the to 2 stopped driving circuit 24 the braking signal of when rotate pause mode immediately after the the control signal it the substantially the after the by is is interBRAKE with supplied continuous released. capstan VD/CTL is fact and motor the Then, 2 RF switching the for servo RFSWP pulse Reference for circuit the recorded details further continuous of timing 29 circuits 25a, connected together to the (Figure of the flip-flop circuit 25a of the flip-flop circuit 25b, flop circuit terminal Q braking is 25a of the terminal CL of a clock terminal C of is supplied with servo frequency The 8 amplifier sides circuit of The to in the diodes 29. The terminal clear Q terminal of PS an the CL flip- output side input of the the flip-flop circuit this flip-flop circuit which RFSWP pulse 3) (Figure VD/CTL and produces emitter the delivers supply preset tracking 29a, 29b cathodes and Q of terminal terminal control in of both the the to a base of a is grounded clock terminal 25c to 25e to a +Vcc. the flip-flop PS, to anode circuit 27 continuous diodes the a resistor through terminal source reproducing transistor connected 25b the supplied this of is which is produces circuit output its 13 thereof voltage switching signal 3) flip-flop connected 27b control collector RF SLOW f r o m signal output a D 25d. (Figure An 27a, circuit 25c. transistor positive the inverter an the and clear 25a C of 25b to D terminals inverting an a and includes terminal to circuit to 28, grounded the both 25 inverting connected driving parts. command a preset connected of and input circuit is and is flip-flop 25a through An 3). the corresponding circuit pause the 25, 28, a part their having receive 26 microcomputer 25b button, circuitry circuit and generating review circuit elements same is later. references like the signal flip-flop the circuit be can a picture record a generating braking which picture practical the 3 designate Figure The delay 3 in Figure of confirming previously when not with example 27, place described be signal circuit recording in section an record a new or provided will timing control tracking those the to pertaining which 5 shows Figure picture camera of whether or the other, on. a the not or each locks designates whether preceding a video by 50 recorded surely to connected numeral confirming is recorded 2 rapidly motor capstan with synchronized are 27a, circuit sides and also recording 27b are 25b of to is diodes cathode delay connected resistor 29b to connected the end one 32 resistor is diode 29c form during 33 resistor resistor 33 in resistors is not shown by the command to desired 34 of circuit an and 29c are its at 28 which from the the 29b of the thereof. changed by to a open microcomputer the If 2 motor loop controlled direction. 33 diode rotation CFWD f r o m Also, resistor the 27d, discharge and figure control capstan switchably are variable it appropriately, is connected which 36 becomes 4E Figure provided also 27 serves made and decide to via terminal at also to braking common for use the the recording of level two side output to the the braking terminal circuit in AND an which 35 input one the set The preventing within or to at a resistor for continuous the connected together. serves and is input connected misoperating is 32 connection are 34 28a 34 of This 28. tracking circuit delay the signal C.CUT therethrough. The connected other through resistors to the inverting 25b in the timing the variable the signal resistor pulse 28b, width the AND c i r c u i t 28c and the terminal output resistor of terminal input 28d set resistor resistor the thereof circuit applied to capacitor times τ1 and τ2 in common a transistor AND c i r c u i t through of AND c i r c u i t control the the loops adjusted delay end one AND c i r c u i t 29, rotation terminals this base the the of the 32 29. and (REV) signal resistor tracking direction the this circuit of 29a, values. circuit of in to set The input reverse of 29a and/or a charge discharge 27c possible form the 27b, the a together diode rotation and/or response the end delay (FWD) a close recording 29d These in use loop during charge and/or 29d for of diodes 29c, 33. end one the other discharge diode the The 27c, direction while switch,which 26 and/or charge capacitor These the of resistors capacitor common 27a, anodes the 32. a continuous 3), the and made are forward (Figure via the a a resistor to together variable and 27 the the grounded capacitor circuit while through of 27d 27c, respectively, 32, are and resistors variable through generating 28b 28d of and is the Q of a capacitor suitably braking variable the circuit flip-flop 25 28e. and In adjusted, signal 28a it BRAKE also this is is resistor circuit grounded case, if possible (which in other words a desired at Figure 4F) common connection 28e a and the Numerals for serving recording mode operation mode. circuits 37 from the motor 2 37 the the direction AND c i r c u i t of is the direction, ON to during the normal operation opened by also connected is thereto the normal' the these of AND CFWD d e l i v e r e d the capstan that so 39 28a connected and SREV signal AND c i r c u i t the the 34, achieve the when AND c i r c u i t reversed ON to reverse continuous for the AND c i r c u i t turned and a transistor when mode, of AND c i r c u i t s driving from a fall 38 also is transistor the 39 reversed SREV. signal the Further, namely base from output for mode, produce the signal forward turned the the the is which used 3) recording thereto is terminals output connected the for (Figure the are forward 26 by opened the 38 with capacitor 28a denote used input supplied in is by the a abrupt. of AND c i r c u i t the 38 more 37 continuous during series, respectively 3) is in 28g with in T1 between Also, AND c i r c u i t the 38 microcomputer AND g a t e of width pulse 28b and Each (Figure resistor made and and the is 37 The value. BRAKE deciding directions. of a diode signal braking predetermined proper terminal and 28f the and point output resistor the to corresponds the braking signal a transistor 41 of drive control section (not The signal terminals Qs 4C Figure circuits 25a, microcomputer control signal of the 25b 26 the circuitry initial circuit by level so that circuit to the (Figure VD/CTL circuit generating of 28a, a diode its at the 40 emitter to a a the driving 5 will be to same 25b at 25 25 the at the supplied, is inverted the output signal of C.CUT 25b SLOW as of at point output low whose in the and the timing in flip-flop from the the which (L) timing low shown Q of terminal level the output (H) originated time from side and terminals the the level high command is the 25a signal D input pause 3), at stay Figure mode, operation When the in circuits flip-flop inputted flip-flop (H) delivers respectively. is via produces and the In generating (L), then which AND c i r c u i t supplied CERR operation next. level is BRAKE, the shown). described signal of signal output to the high signal waveform is shown in 27a to 4E, Figure by the charge output rises with time in terminal (H) of PS the by 28e capacitor to Accordingly, 28a the having be will the to opens braking achieve the 41 transistor On as the since flop circuit the driving other hand, with the the pause fall of with level of the output changes to the low the release RF switching command output terminal Q thereof output terminal Q of and the level of inverting circuit output the 25b terminal initial operation flip-flop discharged via flip-flop Q thereof Further the the presets due circuit 29a goes BRAKE signal which 4F, 28e BRAKE is it utilized is not to and only to the RFSWP level of 25b 25a, as to flipafter inverting level high, circuit the synchronism the by the (H), low and the which the high goes terminal Q of so the immediately high goes Q of in (L) the high when 4C, terminal circuit output AND c i r c u i t pause release level to Q thereof terminal the the at C.CUT, supplied the the flip-flop output the also the capacitor Figure pulse changes inverting (H) in association the the high. Figure the is signal. shown as of held in which also control level the to on braking of in so (H), signal but signal-SREV in 25a 38 37, C.CUT signal the constant braking AND c i r c u i t s SLOW f a l l s command, This signal is shown as T1 Q of high side level a high terminal the the 27c. preset at and 28a goes output time 28d. reversed 34 width the by 28c, the to its pulse determined supplied when the set which AND c i r c u i t at produce is 28d above, the mode, resistor the AND c i r c u i t the resistors signal of in resistor and level same, shown as 33 a high by which 34 substantially output the described of side output the the determined 25a inverting through charge as circuit via AND c i r c u i t the C.CUTl operation and hence terminal input the 25b therefrom signal capacitor initial from that so for supplied, operation (FWD) time τ1 flip-flop circuit supplied other the the the of the output flip-flop side a delay constant Also, 33, is C.CUT signal direction capacitor its at produces This forward the during example, diode obtained. is 4D Figure this flip-flop that so the the return mode to mode. to the fact 25b goes during, for that low, the the example, output terminal capacitor the forward 33 Q of is direction of AND c i r c u i t the the of constant the words, 34 at Figure 1 which is during the so system the that the E in will servo 6 shows to switch depressed a the hence is signal review button to 3) (Figure mode and the time, a same the The which signal as to this the servo put the capstan At this further delivered connect terminal control signal 3) the to input counter frames, flop it circuit not from the 26 the a switch produces to the a carry reset a in Figure review the of the 58 so to reproducing signal so and that is level 26 into reset the them. the by signal circuit is 56 (Figure reversed 2 At high. goes 26 is 6, 52 high enter motor 3), command (Figure 3) so mode. circuit flip-flop so that reproducing to point button circuit output reverse delivered same, time triggered capstan a, the 42 the flip-flop circuit a contact is C to to 55 its the this In microcomputer system supplies to 59 the mode, 3). micro-computer output from of configuration This the to that so the counts 53 is time, to the 2 is shown high. 56 of Then, operation record circuit to in constants a flip-flop VTR 2 in 59 this goes motor terminal 56 switch and system supplied 54 point 54 microcomputer to time the 52, 57 the after a practical (Figure on), derived signal time other shown motor normal counters circuit a terminal via applied by level 50 thereof flip-flop flip-flop high turned to the of When permit also of soon capstan the time timeT2. 4G) delay In as t1 delay of a terminal thereby playback from via supplied time make the out. output the the circuit 51., the characteristic (Figure to the of faster. carried (or 29c. example from terminal connected and an confirming 2 are resistor this those with the drive, as 4E Figure side output by T2 respond operations Figure is to than A record set time the determined by to equivalent at be rise only smaller the circuit, shifted a manner record in and the such Figure of which 2 starts in controlled servo 33 predetermined motor capstan shown as substantially timing 2 is C.CUT signal capacitor motor capstan the falls will which time τ2 that so transport tape the as the to 8 amplifier counter supplies is to reproducing control the it set 56 When 54. signals it capstan to (Figure the motor of 42 flip2 is in put circuit allow rotation forward the is 58 the changed reproducing mode the from the and contact control of position that to a the b to thereby the counter to be fed the 54 reproducing signal switch to 55. When the the to 2 are from such the due in the terminal 53 to 26 the the time rewind time described be it is or previously at the picture new the to highly edit of the time that so same, E in point 26. the to is recorded be recorded or unnaturalness can continuously the tape the place not or or consistently it is possible of reproduction disturbances as E to point whether previously, and/or recording periods time recorded properly B continuous on confirm A and above picture continuously the the recorded micro- points like the was VTR e n t e r s time from to the Thus, frames, 52 transmitted the the relevant and/or is 52 that Then, above, circuit flip-flop for possible picture no above of modifications art and signal of the to the picture point. The the also can precise having embodiment the so 15 B. connected and picture C to circuit by A to performed. connected reset the shown tape are accurately obtain the mode consistently whether mode points as that SLOW s i g n a l operations portion a carry to microcomputer A', Since or the point recording 52 point flip-flop operation 2 to by time fact the produces the Figure shown the of into again to state computer produces circuit the from it frames control completed. Also, reset, counts flip-flop operations Figure 55 counter consecutive it supplies all 54 of signal the is description the invention, but and variations could without invention departing as defined given it on will be be a preferred effected of from the scope by the appended that apparent the by one novel claims many skilled concepts only. in 1. for A video selectively directions by control being record a amount an in that said to said by operating of motion on it drive in a the tape for an amount second means for reversing to the first predetermined in the reproduction said to arranged of output the the be set be by an output drive tape of output first 3. the which control means, the of and output the forward the second mode flip-flop. to output of the signals for forward to corresponding numbers and nearly equal of operation finish of its first the which is reset by be to flip-flop actuating counter, an which is and to means in whereby, mode reverse 1 in claim to counter and a first recorder the use, the to according be actuating recorder reset by an which means is is and in to of output to the tape with the output be reset drive of actuating be by means the the count the arranged to 2-in a reproduction arranged whereby accordance claim to according which counter flip-flop counter, in first and operating and a second of with according signals an tape a second signals said flip-flop. for means the means control amount an a check means mode after a means, enters A video includes mode control by means the number, by recorder includes actuating to the of number of tape reversing predetermined tape said first substantially number tape means count the of mode, reproduction second number actuating further a reversed mode. arranged reset and A video first for until recorder 2. record means the first track for means said is tape is a change use, predetermined predetermined the which in means a second the means reverse in longitudinal a comprises of total the a first to and when, mode, a pause drive tape forward that so actuating tape reaches counted to condition recording responsive tape mode including in tape arranged recorded signals the a corresponding characterised of advancing and from made recorder tape set the by output enters second the A video 4. which in first the arranged first so to as be to arranged so and forward and control thereon from changing by amount an the a record number made an amount and tape number of the an after to numbers amount the of the in a first the the control equal of the signals to the recording in the tape of a a playback total further first when number checking the and a a second tape to a tape along reversing for signals of recorded predetermined by the mode. comprises, mode, tape forward forward intervals it in counter having tape a pause flip-flop advancement that corresponding nearly finish control tape, substantially second by on to reversing signals, predetermined recording mode corresponding control the predetermined characterised track, longitudinal the the to being first first in controlling at signals the are signals means the to counter directions, reverse of output signals second for A method 5. in the to control recorder which means switch common the by control the the supply 3 in the operating switch common the controlled for claim to according means selectively counters, supply mode reverse to as the include mode second and and means reproduction a recorder tape of the reversing predetermined step. mode first the