GB2083266A - Video disc player with repeated replay of selected passages - Google Patents
Video disc player with repeated replay of selected passages Download PDFInfo
- Publication number
- GB2083266A GB2083266A GB8123364A GB8123364A GB2083266A GB 2083266 A GB2083266 A GB 2083266A GB 8123364 A GB8123364 A GB 8123364A GB 8123364 A GB8123364 A GB 8123364A GB 2083266 A GB2083266 A GB 2083266A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reproducing
- address
- repetitively
- recording medium
- address signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/005—Programmed access to indexed parts of tracks of operating discs, by guiding the disc
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/08—Track changing or selecting during transducing operation
- G11B21/081—Access to indexed tracks or parts of continuous track
- G11B21/083—Access to indexed tracks or parts of continuous track on discs
- G11B21/085—Access to indexed tracks or parts of continuous track on discs with track following of accessed part
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/005—Reproducing at a different information rate from the information rate of recording
- G11B27/007—Reproducing at a different information rate from the information rate of recording reproducing continuously a part of the information, i.e. repeating
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/11—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information not detectable on the record carrier
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
- G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
- G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
- G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
- G11B27/3036—Time code signal
- G11B27/3054—Vertical Interval Time code [VITC]
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/60—Solid state media
- G11B2220/65—Solid state media wherein solid state memory is used for storing indexing information or metadata
Landscapes
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Moving Of Head For Track Selection And Changing (AREA)
Abstract
A video disc player e.g. of the capacitive type with servo-controlled head tracking, wherein address signals are recorded in each vertical blanking period, has provision for repeated replay of a selected passage if the operator (i) actuates switches 52, 53 at the start and end of the passage, which causes the corresponding addresses to be entered into a memory 51 of a microcomputer 20; and then (ii) actuates a switch 54 to initiate replay, whereupon a fast-speed search circuit 56 responsive to the difference between the current and the start addresses moves the pickup radially to the latter, whereupon replay commences. When replay finishes, the circuit 56 returns the pickup to the start address again. Each address signal represents the elapsed playback time at the location of the address. <IMAGE>
Description
SPECIFICATION
Apparatus for reproducing a rotary recording medium
The present invention generally relates to apparatuses for reproducing a rotary recording medium, and more particularly to an apparatus for reproducing a rotary recording medium which is capable of automatically and repetitively reproducing a certain interval in the rotary recording medium by performing a simple operation of a switch to specify the certain interval which is to be reproduced repetitively.
There are cases in which it is desirable to repetitively see the scene of the same interval, when observing a reproduced picture obtained by reproducing a video signal recorded within a rotary recording medium. In these cases, conventionally, the reproducing apparatus is put into a reverse mode, and then put into a normal mode when the desired reproduced picture is obtained. When the reproducing apparatus finishes reproducing the desired picture for a second time, the reproducing apparatus is again put into a reverse mode, and the above operations are repetitively performed to repetitively reproduce the desired picture. However, the operation to change the operational mode of the reproducing apparatus is complex in the above conventional method.Further, there was a disadvantage in that much time was lost upon repetitive reproduction, since the speed at which the reverse and normal modes are performed is the same for the two modes.
Accordingly, it is a general object of the present invention to provide a novel and useful apparatus for reproducing a rotary recording medium, in which the above described disadvantages have been overcome.
The present invention provides an apparatus for reproducing a rotary recording medium recorded with an information signal and an address signal which substantially indicates recorded positions of said information signal, said apparatus comprising, reproducing means for reproducing said information signal and said address signal from said rotary recording medium, detection means for detecting said address signal from the signals reproduced by said reproducing means, first switching means operated in response to a starting position and/or a finishing position of a desired repetitively reproducing interval, while monitoring the information signal reproduced by said reproducing means, second switching means operated upon repetitive reproduction of said desired repetitively reproducing interval, and repetitively reproducing means for repetitively performing operations in which addresses at the starting and finishing positions of the desired repetitively reproducing interval specified by an operation of said first switching means are respectively memorized from said address signal obtained from said detection means, and said reproducing means is moved to the starting position of said desired repetitively reproducing interval in response to an operation of said second switching means, to perform normal reproduction from the starting position to the finishing position of said desired repetitively reproducing interval.
Another and more specific object of the present invention is to provide an apparatus for reproducing a rotary recording medium, constructed so that a desired interval (period) which is to be repetitively reproduced is set by a simple operation, and capable of automatically and repetitively reproducing information contents within the above desired interval (period). According to the apparatus of the present invention, only the desired interval is repetitively reproduced, by performing a simple operation of a switch in which the operator specifies the desired interval which is to be repetitively reproduced while observing the reproduced picture.Hence, compared to a case in which search is performed to locate the desired interval within the recording medium from the beginning of the recording medium, the location of the desired interval within the recording medium can be obtained within a short period of time. In addition, the apparatus according to the present invention is effective in that the desired interval can be accurately and positively reproduced.
Other objects and further features of the present invention will be apparent from the following detailed description when read in conjunction with the accompanying drawings.
Figure 1 is a systematic block diagram substantially showing an embodiment of a rotary recording medium reproducing apparatus according to the present invention;
Figure 2 is a systematic block diagram showing an example of an address detection circuit within the block system shown in Fig.
1;
Figure 3 is a systematic block diagram showing a circuit capable of performing a part of the operation performed by a micro-computer within the block system shown in Fig.
1, together with a switch which operates together with the circuit; and
Figure 4 is a systematic block diagram showing a circuit capable of performing another operation of a micro-computer within the block system shown in Fig. 1.
In Fig. 1, a rotary recording medium (hereinafter simply referred to as a disc) 10 in which a video signal is recorded, is rotated at a predetermined speed by a turntable 11. A reproducing stylus 13 of a signal pickup device 12 makes contact with the recording surface of the disc 10. to pickup and reproduce the recorded signal from the disc 10. In the present embodiment of the invention, the video signal is recorded on the disc 10 as a variation in geometrical configuration, and the recorded video signal is reproduced from the disc 10 due to variation in the electrostatic capacitance between the disc 10 and an electrode of the reproducing stylus 13. Further, reference signals for performing tracking control are recorded on the disc 10 besides the video signal, and these reference signals are reproduced together with the video signal.
The signal picked up and reproduced from the disc 10, is supplied to a demodulator 15 and a tracking control circuit 16 through a head amplifier 14. Reference signals for tracking control are separated at the tracking control circuit 16, and a tracking control signal is formed from these reference signals. The tracking control signal thus formed by the tracking control circuit 16 is supplied to a coil used for tracking within the pickup device 12.
Accordingly, tracking control is performed so that the reproducing stylus 13 accurately scans over the video signal tracks on the disc 10.
On the other hand, the picked up video signal is demodulated at the demodulator 15.
and then supplied to a video signal processing circuit 17 wherein a predetermined signal processing is performed. Hence, the demodulated video signal thus subjected to the predetermined signal processing, is supplied to an image receiving tube (not shown) of a receiver from a terminal 18, and reproduced as a reproduced picture. The signal from the demodulator 15 is also supplied to an address signal detection circuit 19 wherein an address signal within the signal thus supplied is detected. The detected address signal is supplied to a micro-computer 20.
Four fields of video signals, for example, are recorded in a spiral track of the disc 10, for one rotation of the disc 10. Further, vertical synchronizing signals are recorded at four positions per one track turn of the disc 10. In each of the vertical blanking periods, a coded address signal indicating an absolute address of the position of the information signal as a time data indicating the time required to perform normal reproduction from an outermost peripheral position of the disc 10 to the position indicated by the absolute address, is recorded at a position at the eighteenth H (H indicates a horizontal scanning period) from the rising edge of the vertical synchronizing signal.
The address signal detection circuit 19 comprises a block system shown in Fig. 2, for example. The reproduced signal supplied from the demodulator 15 through a terminal 30, is amplified to a desired level at a video amplifier 31 consisting of a differential amplifier.
The reproduced signal thus amplified at the video amplifier 31 is supplied to a band-pass filter 32 wherein the address signal is obtained. The address signal obtained at the band-pass filter 32 is subjected to waveformshaping at a comparator 33 wherein the level of the address signal is compared with a reference level. The output of the comparator 33 is supplied to a data domodulator 34 and to a self-reproducing type clock pulse generator 35. The data which is demodulated at the data demodulator 34 is successively shifted at shift registers 36, 37, 38, 39, and 40.
On the other hand, the output of the shift register 40 is also supplied to a decoder 42 wherein a synchronizing bit existing at the beginning of the address signal of twenty-nine bits is detected. The detected synchronizing bit is supplied to a switching pulse generating circuit 43 comprising a flip-flop, for example, to set the switching pulse generating circuit 43. The switching pulse generating circuit 43 is reset by a vertical synchronizing signal of the video signal which is supplied from the video signal processing circuit 17 through a terminal 44. Hence, the above switching pulse generating circuit 43 generates a switching pulse in response to the above setting and resetting operations.
A switching circuit 46 is switched over by a switching pulse supplied from the switching pulse generating circuit 43, and passes the clock pulse from the clock pulse generating circuit 35 in order to read in data during a period in which the data of the address signal exists. Further, the switching circuit 46 performs a switching operation to pass the clock pulse supplied from the micro-computer through a terminal 45, to shift the data through the shift registers 36 through 40 by the clock pulse.
The detected address signal obtained from an output terminal 41 is supplied to the micro-computer 20. A block system describing a part of the operation performed by the micro-computer 20, is shown in Fig. 3. In Fig.
3, the detected address signal of the address signal detection circuit 19 from the output terminal 41, is supplied to a random access memory (RAM) 51 through a terminal 50.
When a picture of a video information content which is to be repetitively reproduced (referred to as a desired repetitively reproducing picture) appears in the reproduced picture while the operator watches the reproduced picture in the image receiving tube of the above receiver, after once reproducing the whole program (when it is desirable to repeatedly see a swing of a golfer, for example, in a case where the golfer addresses the golf ball and the like), the operator pushes a repetitve reproduction start specifying switch 52 of a switch group 21. Hence, the address signal of the time data at the point in time when the switch 52 is pushed, is stored into the RAM 51 as a repetitive reproduction starting address.Next, when the desired repetitively reproducing picture ends (upon completion of the golf swing of a golfer, for example) while the operator watches the reproduced picture, the operator pushes a repetitive reproduction finish specifying switch 53 of the switch group 21. Accordingly, the address signal of the time data at the point in time when the switch 53 is pushed, is stored into the RAM 51 as a repetitive reproduction finishing address.
A repeat switch 54 is pushed after the above described operations are performed.
Thus, the address at the point in time when the repeat switch 54 is pushed, and the repetitive reproduction starting address stored within the RAM 51, are supplied to a fastspeed search circuit 56. The fast-speed search circuit 56 rotates a motor 22 for moving the signal pickup device 12 in the radial direction of the disc 10, with a rotational direction and a rotational speed in response to the difference between the two addresses supplied thereto. Accordingly, the signal pickup device 12 is moved at a fast speed until the detected address signal from the address signal detection circuit 19 coincides with the above repetitive reproduction starting address.
The detected address signal from the address signal detection circuit 19 is supplied to the micro-computer 20, also during the above period in which the signal pick-up device is moved at high speed. When the above detected address signal coincides with the above repetitive reproduction starting address stored within the RAM 51, the operation of the fastspeed search circuit 56 is stopped. At the same time, a normal reproduction signal is produced from the RAM 51, to operate a normal reproduction circuit 57. Therefore, the reproducing apparatus is put into a normal reproducing state. Hence, after the above described fast-speed search is performed, normal reproduction is performed automatically, from the starting position of the desired repetitively reproducing picture.
During normal reproduction, the detected address signal from the address signal detection circuit 19 is supplied to the micro-computer 20. When the detected address signal coincides with the above repetitive reproduction finishing address stored within the RAM 51, normal reproduction is stopped, and the fast-speed search circuit 56 is operated. The fast-speed search circuit 56 then moves the signal pickup device 12 until the detected address coincides with the repetitive reproduction starting address. When the two addresses respectively coincide, the normal reproduction circuit 57 is operated again, to again perform normal reproduction in the above repetitive reproduction interval.
The above described repetitive reproduction is performed to reproduce the specified desired repetitive reproduction interval, until another switch is operated to perform reproduction of another mode.
Furthermore, when the operator is to perform the specifying operation to specify the starting and finishing positions of the desired repetitively reproducing picture while reproducing a disc whose picture contents are unknown in a normal reproduction mode, there are often times when the operator cannot find the starting position of the desired repetitively reproducing picture, and notices the above desired repetitively reproducing picture after passing the starting position of the desired repetitively reproducing picture. In order to repetitively reproduce the desired picture in this case, the normal reproduction mode is maintained, and the switch 53 is pushed when the finishing position of the desired repetitively reproducing picture is reached. At this point in time, a switch 61a is closed by a control circuit 60 shown in Fig. 4.
Further, the incoming detected address signal supplied to a terminal 50 is stored into a memory 62.
Next, when a backward switch 55 shown in
Fig. 3 is pushed, a backward reproduction circuit 58 is operated to put the reproducing apparatus in a backward reproduction mode.
Hence, the operator pushes a switch 52 when the picture at the repetitive reproduction starting position is reproduced, while observing the picture reproduced by the backward reproduction mode. At this point in time, a switch 61 b is closed by the control circuit 60, and the incoming detected address signal supplied to the terminal 50 is stored into a memory 63. The memory contents of the memories 62 and 63 are respectively supplied to a comparator 64, so as to compare the size of the time data as the address signal. The time data becomes smaller at the outer peripheral position of the disc 10, and larger at the inner peripheral position of the disc 10.
In a case where the comparator 64 judges that the time data first stored into the memory 62 is larger than the time data secondly stored into the memory 63, the address signal from the memory 62 and the address signal from the memory 63 are interchanged at an interchanging circuit 65 provided at a following stage. The interchanging circuit 65 then produces an address signal of the smaller time data as the address signal specifying the desired repetitive reproduction starting position from an output terminal 65a, and produces an address signal of the larger time data as the address signal specifying the desired repetitive reproduction finishing position from an output terminal 65b, to supply these address signals to a reproduction mode processing circuit 66.
Moreover, in a case where the switch 52 is pushed first to store the desired repetitive reproduction starting position in the memory 62, and the switch 53 is secondly pushed to store the desired repetitive reproduction finishing position in the memory 63, the comparator 64 judges that the time data of the memory 62 is smaller than the time data of the memory 63. Accordingly, the interchanging circuit 65 does not perform an interchanging operation, and the address signals of the memories 62 and 63 are respectively produced as they are, from the output terminals 65a and 65b.
The repetitive reproduction operation from that point on is performed as already described above, by pushing the repeat switch 54. Therefore, repetitive reproduction is performed from the desired repetitive reproduction starting position regardless of the order in which the switches 52 and 53 are operated.
In the above embodiment of the present invention, the switches 52 and 53 are provided to specify the repetitive reproduction starting position and the repetitive reproduction finishing position. However, only one switch can be provided instead of the two switches to perform the operation, or the apparatus can be constructed so that only one of the two switches is operated. In addition, a single switch may be provided instead of the two switches, to store data in the memories 62 and 63 according to the order in which the single switch is pushed. In this case, it is preferable to provide two display elements such as lamps, so that it can easily be seen how many times the switch has been operated (pushed).
The block systems in Figs. 3 and 4 show the operations of the micro-computer 20 in a hardware form. However, the micro-computer 20 itself does not necessarily comprise the block systems indicated in the figures.
In the present embodiment of the invention, the so-called electrostatic capacitance reproduction system which performs reproduction according to the variation in the electrostatic capacitance is used as the reproduction system, however, the present invention is not limited to this application, and can be applied to a so-called optical reproduction system which performs reproduction by use of a lazer beam.
Further, this invention is not limited to the above described embodiments, but various variations and modifications may be made without departing from the scope of the present invention.
Claims (5)
1. An apparatus for reproducing a rotary recording medium recorded with an information signal and an address signal which substantially indicates recorded positions of said information signal, said apparatus comprising:
reproducing means for reproducing said information signal and said address signal from said rotary recording medium;
detection means for detecting said address signal from the signals reproduced by said reproducing means;
first switching means operated in response to a starting position and/or a finishing posi
tion of a desired repetitively reproducing inter
val, while monitoring the information signal
reproduced by said reproducing means;
second switching means operated upon re
petitive reproduction of said desired repeti
tively reproducing interval; and
repetitively reproducing means for repeti
tively performing operations in which ad
dresses at the starting and finishing positions
of the desired repetitively reproducing interval
specified by an operation of said first switch
ing means are respectively memorized from
said address signal obtained from said detec
tion means, and said reproducing means is
moved to the starting position of said desired
repetitively reproducing interval in response to
an operation of said second switching means,
to perform normal reproduction from the start
ing position to the finishing position of said
desired repetitively reproducing interval.
2. An apparatus for reproducing a rotary
recording medium as claimed in claim 1 in
which said first switching means has a switch
for specifying an address corresponding to said starting position which is operated when
the reproducing position of said reproducing
means reaches the starting position of said
desired repetitively reproducing interval, and a
switch for specifying an address correspond
ing to said finishing position which is oper
ated when the reproducing position of said
reproducing means reaches the finishing posi
tion of said desired repetitively reproducing
interval.
3. An apparatus for reproducing a rotary
recording medium as claimed in claim 1 in
which said repetitively reproducing means has
a random access memory supplied with the
address signal of said detection means, for
respectively memorizing a starting position ad
dress and a finishing position address speci
fied by the operation of said first switching
means, and a circuit for moving said repro
ducing means in a forward or a reverse direc
tion until the address signal from said detec
tion means coincides with said starting posi
tion address specified and memorized in said
random access memory, in response to an
operation of said second switching means, to
put the reproducing apparatus in a normal
reproduction mode when the above address
signal from said detection means and coin
cides with starting position address.
4. An apparatus for reproducing a rotary
recording medium as claimed in claim 1 in
which said repetitively reproducing means
memorizes the smaller address as the starting
position address and the larger address as the
finishing position address of the two ad
dresses specified, regardless of the order in
which operation is performed to specify the
starting and finishing position addresses of
said desired repetitively reproducing interval
by said first switching means.
5. An apparatus for reproducing a rotary recording medium as claimed in claim 1 in which said address signal consists of time data which indicates each position on the rotary recording medium by a time required to
perform normal reproduction from an outer
most peripheral position of the rotary record
ing medium to each position on the rotary
recording medium.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10728980U JPS5730870U (en) | 1980-07-29 | 1980-07-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2083266A true GB2083266A (en) | 1982-03-17 |
| GB2083266B GB2083266B (en) | 1984-07-25 |
Family
ID=14455314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8123364A Expired GB2083266B (en) | 1980-07-29 | 1981-07-30 | Video disc player with repeated replay of selected passages |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5730870U (en) |
| DE (1) | DE3129640C2 (en) |
| FR (1) | FR2488030B1 (en) |
| GB (1) | GB2083266B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2513420A1 (en) * | 1981-09-24 | 1983-03-25 | Sony Corp | DISC PLAYER IN PARTICULAR OPTICAL DIGITAL DISC |
| GB2117963A (en) * | 1982-03-05 | 1983-10-19 | Sony Corp | Disc players |
| FR2544536A1 (en) * | 1983-04-12 | 1984-10-19 | Telemedia Gmbh | Video disk information system |
| EP0280573A2 (en) * | 1987-02-26 | 1988-08-31 | Pioneer Electronic Corporation | Device for reproducing still pictures with an audio portion |
| GB2227596A (en) * | 1988-12-08 | 1990-08-01 | Samsung Electronics Co Ltd | Replay of audio/video recording |
| GB2227593A (en) * | 1988-12-31 | 1990-08-01 | Samsung Electronics Co Ltd | Repeat reproduction method and apparatus for magnetic tape |
| EP0476723A2 (en) * | 1987-02-27 | 1992-03-25 | Pioneer Electronic Corporation | Data reproducing method and device |
| EP0566146A2 (en) * | 1992-04-16 | 1993-10-20 | Sony Corporation | Optical disk apparatus |
| WO1997008699A1 (en) * | 1995-08-22 | 1997-03-06 | Philips Electronics N.V. | Player for reading audio signals and/or video signals from a medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0644385B2 (en) * | 1985-01-12 | 1994-06-08 | パイオニア株式会社 | Disc player |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3721757A (en) * | 1971-02-08 | 1973-03-20 | Columbia Broadcasting Syst Inc | Method and apparatus for automatically editing television information |
| GB1576426A (en) * | 1976-03-19 | 1980-10-08 | Rca Corp | Eccentricity compensating system in recording and playbackapparatus |
| GB1577133A (en) * | 1976-03-19 | 1980-10-22 | Rca Corp | Video information record and playback apparatus |
| CH600480A5 (en) * | 1976-03-22 | 1978-06-15 | Naehma Ag | |
| FR2349191A1 (en) * | 1976-04-23 | 1977-11-18 | Thomson Brandt | OPTICAL INFORMATION DISC READER INCLUDING AN AUTOMATIC INFORMATION ACCESS DEVICE |
| JPS5921101B2 (en) * | 1977-11-29 | 1984-05-17 | 日本ビクター株式会社 | Information signal reproducing device |
| DE2850363C2 (en) * | 1977-11-22 | 1986-04-17 | Victor Company Of Japan, Ltd., Yokohama, Kanagawa | Random access arrangement for an apparatus for reproducing information from a rotating recording medium |
-
1980
- 1980-07-29 JP JP10728980U patent/JPS5730870U/ja active Pending
-
1981
- 1981-07-28 DE DE19813129640 patent/DE3129640C2/en not_active Expired
- 1981-07-28 FR FR8114667A patent/FR2488030B1/en not_active Expired
- 1981-07-30 GB GB8123364A patent/GB2083266B/en not_active Expired
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2513420A1 (en) * | 1981-09-24 | 1983-03-25 | Sony Corp | DISC PLAYER IN PARTICULAR OPTICAL DIGITAL DISC |
| GB2117963A (en) * | 1982-03-05 | 1983-10-19 | Sony Corp | Disc players |
| FR2544536A1 (en) * | 1983-04-12 | 1984-10-19 | Telemedia Gmbh | Video disk information system |
| EP0280573A2 (en) * | 1987-02-26 | 1988-08-31 | Pioneer Electronic Corporation | Device for reproducing still pictures with an audio portion |
| EP0280573A3 (en) * | 1987-02-26 | 1989-10-25 | Pioneer Electronic Corporation | Device for reproducing still pictures with an audio portion |
| EP0476723A2 (en) * | 1987-02-27 | 1992-03-25 | Pioneer Electronic Corporation | Data reproducing method and device |
| EP0476723A3 (en) * | 1987-02-27 | 1993-01-20 | Pioneer Electronic Corporation | Data reproducing method and device |
| GB2227596B (en) * | 1988-12-08 | 1993-07-07 | Samsung Electronics Co Ltd | Relay of audio/video recordings |
| GB2227596A (en) * | 1988-12-08 | 1990-08-01 | Samsung Electronics Co Ltd | Replay of audio/video recording |
| GB2227593A (en) * | 1988-12-31 | 1990-08-01 | Samsung Electronics Co Ltd | Repeat reproduction method and apparatus for magnetic tape |
| GB2227593B (en) * | 1988-12-31 | 1993-11-17 | Samsung Electronics Co Ltd | Repeat reproduction method for magnetic tape |
| EP0566146A2 (en) * | 1992-04-16 | 1993-10-20 | Sony Corporation | Optical disk apparatus |
| EP0566146A3 (en) * | 1992-04-16 | 1995-07-12 | Sony Corp | Optical disk apparatus. |
| US5523988A (en) * | 1992-04-16 | 1996-06-04 | Sony Corporation | Optical pickup control apparatus |
| WO1997008699A1 (en) * | 1995-08-22 | 1997-03-06 | Philips Electronics N.V. | Player for reading audio signals and/or video signals from a medium |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2083266B (en) | 1984-07-25 |
| JPS5730870U (en) | 1982-02-18 |
| FR2488030A1 (en) | 1982-02-05 |
| DE3129640C2 (en) | 1983-10-06 |
| FR2488030B1 (en) | 1985-06-28 |
| DE3129640A1 (en) | 1982-04-15 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920730 |