Download Videotape recorder/reproducer - European Patent Office

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