JPH0241833B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc playback device that stores a large amount of information on a disc surface together with an address signal and searches for information using the address signal as a clue.
In particular, the present invention relates to an information retrieval method in a disc reproducing apparatus that allows a user to easily and quickly retrieve desired information to be reproduced using a mark sheet reader.

[Conventional technology]

In recent years, disks have been used as media for recording large amounts of information. For example, optical video disks have become capable of recording large amounts of image and audio information on thin plastic disks. In addition to this information, a unique address signal is recorded on each piece of information on the disk, which is a recording medium, so that each piece of information can be easily searched. For example, an optical video disc has 54,000 tracks of spiral signals processed on one side, each track containing analog and audio signals for one image, and the head of each track. are assigned frame numbers in order. Therefore, when you want to select and play specific information, you can immediately search and read the required information by instructing the disc playback device with the address signal (frame number) of the information. It is suitable for storing documents and searching and reproducing necessary images.

[Problem to be solved by the invention]

The information recorded on this disk cannot be viewed as is, and since the amount of information is extremely large, a special playback device must be used.
It has been difficult to operate this reproducing device to reproduce necessary specific information in a single operation due to the large amount of information unless some method is adopted. For example, there is a primitive method of visually searching for the required information by playing back each track on a disk in order (fast-forwarding, etc.), but this has the disadvantage that the search time is long and the desired information cannot be reproduced accurately. . For this reason, methods have been proposed for quickly and accurately searching for information during disc playback operations. These conventional search methods and their shortcomings will be described below, but all of them have the drawback of being cumbersome in operation.

(A) Setting address signals (frame numbers) using numeric keypad input Select information organized in alphabetical order or alphabetical order using a catalog or index in which disk information contents and address signals correspond to each other. By typing the number of the address signal corresponding to the information using the numeric keypad, the search function inside the disc playback device selects the track of the address signal (frame number), and the information can be displayed on the cathode ray tube. With this method, if you know the address signal number, you can search fairly quickly just by operating the numeric keypad, but in order to know the address signal number,
Furthermore, it is necessary to use a guidebook or the like to accurately grasp the name, theme, etc. of the information to be reproduced, which is troublesome even before operation. Furthermore, if the name or theme of the information is incomplete, or if the number of the address signal is incorrect, completely different information may be selected.

(B) A full keyboard operation method that involves interaction with documents displayed on a cathode ray tube.

In this method, a menu of documents is sequentially displayed on a cathode ray tube, and the user operates a full keyboard to answer the documents, narrowing down the questions in order to search for the desired information. This method eliminates the need for a full keyboard, a list, an index, etc., and eliminates the need to know each address signal number. However, since questions are asked in a menu format, the full keyboard must be operated each time, requiring skill to operate the full keyboard, and the search time can vary greatly depending on the operator's ability. It is something.

In view of the above-mentioned drawbacks, the present invention provides a mark sheet that displays guidance and makes it easy to search for address signals, reads the marks written on the mark sheet using a mark sheet reader, and obtains corresponding information by combining the positions of the marks. The object of the present invention is to provide an information retrieval method in a disc playback device that can select and play back the information.

[Means to solve the problem]

In order to achieve the above object, an information retrieval method in a disc playback device of the present invention includes specifying an address signal while rotating a disc-shaped recording medium on which predetermined information and an address signal for retrieval of the information are recorded. In an information retrieval method in a disc playback device that can play back specific information using Guidance that can be easily searched is displayed, and it is possible to mark the corresponding part of the guidance, and the mark sheet with the mark written in the corresponding part of the specific guidance is inserted into the mark sheet reader and the prescribed mark is read, and the mark sheet is placed on the mark sheet. A preset address signal is selected by a combination of a plurality of marks, and is transmitted to the disc playback device, and the disc playback device retrieves and plays back information from the disc-shaped recording medium corresponding to the selected address signal. It is characterized by this.

[Effect]

Guidance is displayed on the mark sheet in advance. This mark sheet allows you to mark the relevant guidance section. The user only has to mark the displayed guidance part. Load this mark sheet into the mark sheet reader. Thereby, an address signal preset by a combination of a plurality of marks can be selected from the data read by the mark sheet reader, and transmitted to the disc reproducing device to reproduce the information.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 to 5 are circuits showing embodiments of the present invention.

In the embodiments shown in these figures, a video disk playback device is used as the disk playback device, and the video and audio signals in a specific section of the track recorded on the video disk are searched. The situation is expressed audio-visually,
We will explain what can be done to provide travel information.

FIG. 1 shows a tourist spot introduction system by destination, which is an embodiment of the present invention. This system is composed of a video disc playback device 1, a television receiver 2, an address signal identification device 3, and a mark sheet reader 4. ing. This video disc playback device 1 rotates an optical video disc 5 at high speed, irradiates the video disc 5 surface with a laser beam, plays back the video signal and audio information recorded on the track, and transmits this information to the TV. The image can be transmitted to the camera 2 and displayed on the screen of the cathode ray tube 6. The address signal setting device 3 has a flat box shape, and a mark sheet reader 4 is mounted and fixed on the address signal setting device 3. A long and narrow card insertion slot 7 is opened on the entire surface of the mark sheet reader 4. be. This address signal setting device 3 generates a signal (code) of information corresponding to the combination of mark positions read by the mark sheet reader 4.
is selected and output to the video disc playback device 1. Note that the video disc playback device 1, television receiver 2, and address signal setting device 3 are all electrically connected by cables 8 and 9. 10 is a mark sheet used to search information recorded on the disk 5, and this mark sheet 10
is inserted into the aforementioned card insertion slot 7.

FIG. 2 shows the internal structure of the aforementioned mark sheet reader 4. Near the card insertion slot 7, a tension roller 11 and a transfer roller 12 are supported parallel to each other at a distance. A wide belt 13 is wound around between the transfer rollers 12, and the upper surface of the belt 13 is aligned with the opening position of the card insertion slot 7. In addition, the transfer roller 12
A pressure roller 14 that comes into contact with the roller 14 via a belt 13 is pivotally supported above the roller 14 . These rollers 12 and 1
A lamp 15 that is long above the horizontal position of the tangent line is provided behind the lamp 4, and a reading section 16 in which a large number of light receiving cells 17 are arranged in a column is provided below the lamp 1.
5 and the reading section 16 are both positioned parallel to the rollers 12 and 14. Further, at the rear of the reading unit 16, a feed roller 18, whose outer periphery is in contact with the
19 are pivotally supported, and the contact lines of the rollers 18 and 19 are located at the same height and parallel to the contact lines of the rollers 12 and 14. A card ejection port 20 is opened at the side of the box behind the rollers 18 and 19.

FIG. 3 is a detailed explanation of the aforementioned mark sheet 10. The mark sheet 10 has a plurality of questions printed in the form of a questionnaire, and guidance to be searched for is displayed. mark sheet 10
Black bar-shaped timing marks A are printed at equal intervals on the left edge of the
A plurality of mark entry frames B are printed in a row so that marks can be placed on the gun dance portions. Questions such as "budget", "age", "number of times", etc. are printed on the line above each mark entry box B, and each mark entry box B has "100,000, 200,000..."
The answers are printed.

Next, FIG. 4 is a block diagram showing the electrical configuration of the system in this embodiment.

The aforementioned reading section 16 is provided with a plurality of light receiving cells 17, and the reading section 16' corresponding to the timing mark A is provided with a dedicated light receiving cell 21. The output of the reading section 16 is input to the latch circuit 22 in parallel, and the output of the reading section 16' is input to the latch circuit 22.
2 as a control signal. Latch circuit 2
A memory circuit 23 is connected to the memory circuit 2.
3 is connected to an address selection circuit 24 which selects an address signal based on a combination of input signals. A latch circuit 25 is connected to the address selection circuit 24, and a read signal control circuit 26 is connected to the address latch circuit 25. A decoder 27 is connected to the read signal control circuit 26, and the output of the read signal control circuit 26 is sent to a comparison circuit 28.
and an interface 30, and a comparison circuit 28 is connected to the interface 30 via an address latch circuit 29.

The aforementioned video disk 5 is connected to and rotated by an output shaft 32 of a motor 31, a slit disk 33 is fixed to the output shaft 32, and a sensor 34 is provided close to the slit disk 33. , the output of the sensor 34 is sent to the PPL circuit 3 via the amplifier 35.
6, and a motor driver 37 is connected to the PPL circuit 36. The sensor 34, amplifier 35, PPL circuit 36, and motor driver 37 form a motor servo circuit. this
A rotation speed control circuit 38 that outputs a rotation speed reference signal is connected to the PPL circuit 36, and a control timing circuit 39 is connected to the rotation speed control circuit 38. Reference numeral 40 denotes an actuator that is located close to the surface of the video disc 5 and moves in the radial direction thereof. Inside this actuator 40 are an optical system lens 41, a focusing coil 42 for adjusting the focus of the lens 41, and a galvanometer 43. An optical scale 44 for measuring the amount of linear movement is connected to the side of the actuator 40. A laser oscillator 45 that generates a laser beam is provided at the same height position as the galvanometer 43. The laser beam from the laser oscillator 45 is reflected by the galvanometer 43, passes through a lens 42, and is irradiated onto the video disc 5. Ru. A beam splitter 46 is provided in the path of this laser beam, and two light receivers 47 and 48 are provided in the reflected optical path of the beam splitter 46.
8 is connected to a focusing coil driver 49 that controls the focusing coil 42 described above. Further, the light receiver 47 has a built-in light receiving cell divided into two, and the intensity signals of the reflected light received by each cell are transmitted to an adder 50 and a differencer 51, respectively, and the output of the adder 50 is It is input to the video processing circuit 52. Further, a tracking control circuit 53 is connected to the differentiator 51, and a control output of the tracking control circuit 53 is connected to an actuator driver 54 for moving the actuator 40. Further, a measurement signal from the scale 44 is inputted to the tracking control circuit 53 via an amplifier 55, and a control timing circuit 39
are interconnected. The galvanometer 4
3 is connected to a galvanometer driver 56 for controlling the angular position. The video processing circuit 52
Inside, the information on the video disc 5 is analyzed and processed, and among the outputs, the frame number signal is transmitted to the control timing circuit 39, and the video and audio signals are transmitted to the television receiver 2.

The video and audio signals from the video processing circuit 52 are input to an intermediate amplifier circuit 57 and an audio detection circuit 58, and the intermediate amplifier circuit 57 includes a video detection circuit 59, a video amplifier circuit 61, a cathode ray tube 6, a synchronous separation circuit 60, and a deflection circuit 62. are connected in series, and the audio detection circuit 58 includes an audio amplification circuit 63 and a speaker 6.
4 are connected in series.

Next, the operation of this embodiment will be explained.

In the destination-specific tourist spot introduction system of this embodiment,
A system device is installed at the storefront of a travel agency, etc., and customers who wish to participate in a trip (package tour) answer questions on a questionnaire.In other words, they fill out a mark sheet according to the guidance, and the questionnaire is analyzed. The customer then selects the most suitable sightseeing spot for the customer, and then reproduces information about this tourist spot on the television receiver 2 to visually learn about the scenery and customs of the tourist spot and select the destination. It can be used as a reference material. first,
The customer receives one mark sheet 10, which is a sightseeing spot selection sheet shown in FIG. 3, and fills in each corresponding mark entry frame B with a pencil as if answering each question. Once you have filled in the answers to all the questions, insert the mark sheet 10 into the card insertion slot 7 of the mark sheet reader 4.
The address signal setting device 3 reads the items written on the mark sheet 10 and combines the answers to each question to output an address signal corresponding to the most suitable sightseeing spot. The video disc playback device 1 sequentially searches the tracks on the video disc 5 according to the address signal from the address signal setting device 3.
A track with a frame number corresponding to the address signal is selected, video and audio from the track are reproduced, and the video signal is output to the television receiver 2. Therefore, on the screen of the cathode ray tube 6 of the television receiver 2, the scenery etc. of the sightseeing spot selected by the combination of the entries on the mark sheet 10 is displayed together with audio, and the destination is instantly explained visually. That will happen. When the explanation of the sightseeing spot using the mark sheet 10 filled with marks is completed, the video disc playback device 1 plays back the heading track provided at the head (or end) of the video disc 5 according to the program, and the "Card" is displayed on the cathode ray tube 6. Please insert the following message.''

Next, set this information (frame) selection function to the third
In other words, the laser oscillator 45 constantly generates laser light, which passes through the beam splitter 46, is reflected by the galvanometer 43, is focused by the lens 41, and is irradiated onto the video disk 5. The laser beam reflected by the video disk 5 passes through a lens 41 and is sent to a galvanometer 43.
The beam is reflected by the beam splitter 46, split into two directions, and enters the light receivers 47 and 48. The light receiver 48 detects the received intensity and focal position shift of the reflected laser beam, and transmits the detection signal to the focusing coil driver 49, which drives the focusing coil 42 and automatically adjusts the focus of the lens 41. will be held. On the other hand, the light receiver 47 detects the amount of light received by two built-in light receiving cells, and the adder 50 detects the amount of light received.
The adder 50 reproduces the read information (address signal (frame signal) and video/audio signal) and sends it to the video processing circuit 52, and the differencer 51 reproduces the information of both cells. The amount of tracking deviation is detected based on the difference in light amount and is transmitted to the tracking control circuit 53. The tracking control circuit 53 is connected to the scale 4 via an amplifier 55.
The actuator driver 54 is actuated by comparing the position measurement value transmitted from the sensor 4 with the track deviation amount from the subtractor 51, and the actuator 40 is moved so as to always follow the track. Also,
The video disk 5 is rotated at a predetermined angle by the motor 31, and this rotation is followed by the slit disk 33, and the rotation speed is detected by the sensor 34 and transmitted to the PPL circuit 36. The PPL circuit 36 compares the phase with the reference signal from the rotational speed control circuit 38 and transmits the deviation to the motor driver 37, instructing the motor 31 to always maintain accurate rotation. Further, the aforementioned video processing circuit 52 separates the address signal and the video/audio signal from the information from the adder 50, transmits the address signal to the control timing circuit 39, and transmits the video/audio signal to the intermediate amplifier circuit 57.
is transmitted to the audio detection circuit 58. The intermediate amplification circuit 57 amplifies the video signal and transmits it to the next video detection circuit 5.
9, the signal is converted into an analog signal and a video amplification circuit 61 controls the brightness of the cathode ray tube 6. At the same time, a synchronization separation circuit 60 separates a horizontal synchronization signal and a vertical synchronization signal, and a deflection circuit 62 performs raster scanning. is going on. Further, the audio detection circuit 58 converts the audio signal into an analog signal, and the audio amplification circuit 6
The audio is amplified by the speaker 64 and reproduced by the speaker 64.

In this way, the video disc playback device 1 and the television receiver 2 are operating, and when the mark sheet 10 is inserted into the mark sheet reader 4 during this operation, the image of the frame corresponding to the entries on the mark sheet 10 is displayed on the television receiver. It will be played from 2.

When the mark sheet 10 is inserted into the mark sheet reader 4 through the card insertion slot 7, the mark sheet 10 placed on the belt 13 is transferred to the back of the mark sheet reader 4, and is transferred to the reading section 16 while being held between the pressure roller 14 and the belt 13. The sheet passes over the mark sheet reader 4 and is then ejected from the mark sheet reader 4 through the ejection port 20 while being held between the feed rollers 18 and 19. In transporting the mark sheet 10, the mark sheet 10 is transferred to the lamp 15 and the reading section 16.
The light from the lamp 15 is blocked and the amount of light irradiated to the light receiving cell 17 of the light receiving section 16 is changed depending on the density difference between the marks written on the mark sheet 10. can be converted and read. That is, each timing mark A on the mark sheet 10 corresponds to the light receiving cell 21.
It is determined that the reading magnetism for that row is when the amount of light to be decreased is when the amount of light to one of the light receiving cells 17 is blocked by the mark written in mark writing frame B, and which mark writing frame B is It can be determined whether the area is filled in or not (see Figure 2 for this operation). This change in the amount of light due to the light receiving cell 17 is input to the latch circuit 22, but in this latch circuit 22, only when the timing mark A is located on the light receiving cell 21 and a timing signal is input from the reading section 16', the latch circuit 22 receives the timing signal from the reading section 16'. The signal is taken in and stored in memory circuit 2.
3, entries are sequentially stored for each timing mark A, and once the entries for one mark sheet 10 have been taken in, all the stored information is transmitted to the address selection circuit 24. A discriminating mechanism set in advance in the address selection circuit 24 considers combinations of the entries filled in the mark entry frame B, makes the most appropriate discrimination, and outputs the address signal of the sightseeing spot for that combination. This address signal is latched by the latch circuit 25.
The signals stored in the read signal control circuit 26 are transmitted to the read signal control circuit 26. The read signal control circuit 26 analyzes the address signal using the decoder 21, removes unnecessary signals, extracts only the address number, and transmits it to the comparison circuit 28. As mentioned above, the video processing circuit 52 separates the address signal (frame signal) recorded on each track of the video disk 5 and sends it to the control timing circuit 39, and the control timing circuit 39 always receives this address signal. Via the interface 30, the address latch circuit 29 always holds the address signal of the track irradiated with the laser beam and outputs it to the comparator circuit 28 until both signals from the latch circuit 25 and address latch circuit 29 match. The read signal control circuit 26 instructs the control timing circuit 39 to search via the interface 30, and operates the actuator driver 54 to move the actuator 40 relative to the surface of the video disc 5. When both address signals (frame signals) from the latch circuit 25 and the address latch circuit 29 match, the comparison circuit 28 transmits an instruction that the search target has been found to the read signal control circuit 26, thereby controlling the read signal. The circuit 26 instructs the control timing circuit 39 to terminate the search via the interface 30, reads the information on the video disk 5 from the track, displays the video on the cathode ray tube 6, and reproduces the audio from the speaker 64.

Video disc 5 based on this mark sheet 10
The concept of track selection will be explained with reference to FIG. Each item written on the mark sheet 10 is read individually at the time of the timing mark A and is input to the address selection circuit 24 as a result. The address selection circuit 24 has a built-in condition determination function such as a logic circuit, analyzes combinations of items written on the mark sheet 10, makes optimal judgments for all combinations, and outputs preset address signals. As shown in Figure 5, this address signal includes "HAWAII course" C, "GUAM course" D,
There are ``SAIPAN course'' E and ``ROTA course'' F, and each course is output in the form of an address signal converted, and each course is recorded in a specific location on the surface of the video disk 5, so the next This address signal can be used to search for this information and reproduce the image.

〔Effect of the invention〕

Since the present invention is configured as described above, when searching for specific information among the information recorded on the disk, fill in the specified part of the guidance part according to the guidance displayed on the mark sheet, and The desired information can be played back simply by inserting the mark sheet into the mark sheet reader, so even if you are not familiar with operating a disc playback device, you can easily, quickly, and accurately search for information. can.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a system for introducing destinations by destination, which is an embodiment of the present invention, Fig. 2 is a perspective view showing the structure of the mark sheet reader mentioned above, and Fig. 3 is a plan view showing an example of a mark sheet. 4 is a block diagram showing the electrical configuration of the system, and FIG. 5 is a schematic diagram showing the relationship between entries on the mark sheet and information recorded on the video disk. 1... Video disc playback device, 2... Television receiver, 3... Address signal setting device, 4... Mark sheet reader, 10... Mark sheet.

Claims (1)

[Claims] 1. A disk playback device that can play back specific information by specifying the address signal while rotating a disk-shaped recording medium on which predetermined information and an address signal for retrieving the information are recorded. In the information retrieval method, a mark sheet reader capable of reading marks written on a mark sheet and converting them into electrical signals is connected to the disc playback device, and this mark sheet displays guidance that allows the address signal to be easily searched. The corresponding part of the guidance can be marked, and the mark sheet with the mark written in the corresponding part of the specific guidance is inserted into the mark sheet reader to read the predetermined mark, and the mark sheet is set in advance by a combination of a plurality of marks on the mark sheet. An information retrieval method in a disc playback device, characterized in that a certain address signal is selected and transmitted to the disc playback device, and the disc playback device searches and plays back information from a disc-shaped recording medium corresponding to the selected address signal. .