JPH08171195A - Magnetic recording / reproducing method in film player - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a magnetic recording / reproducing method for a film player, which determines the service life of a photographic film having a magnetic recording layer and prevents the film from being used beyond the service life of the photographic film. And [Structure] A film of a film cartridge loaded in a film player is conveyed, and the number of times the film is loaded from the magnetic recording layer of the leader portion of the film and the distance traveled by the magnetic head during magnetic recording / reproduction of the film is read ( S110). Then, the number of times of loading is incremented by 1, and the running distance over which the magnetic head is newly slid is measured, and the running distance obtained by adding the incremented number of times of loading or the read running distance and the measured running distance is calculated. An alarm is generated when the life of the film is exceeded (S12
2). Then, at the time of recording the magnetic information before taking out the film cartridge, magnetic information indicating the incremented loading number and the added traveling distance is recorded on the magnetic recording layer of the leader portion of the film (S12).
6).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing method for a film player, and more particularly to a magnetic recording / reproducing method for a film player using a film having a magnetic recording layer.

[0002]

2. Description of the Related Art Heretofore, there has been proposed a camera which uses a photographic film having a magnetic recording layer and can write or read information such as a shooting date and time and shooting information with a magnetic head at the time of shooting (Actual Kaisho). 4-89934, JP-A-4-11237, WO90 / 430.
1).

After the photographic film is developed, the information recorded on the magnetic recording layer of the photographic film is used as information when a film image is taken by an image sensor and reproduced on a monitor TV (WO98 / 4301). ,
Alternatively, it is used as information for simultaneous printing. Also,
Before reproducing each frame image on the monitor TV, the automatic reproduction information such as the image switching method, the switching time, and the color correction information for each frame is recorded on the magnetic recording layer of the film,
An automatic reproduction method of each frame image of the film is proposed based on the information.

[0004]

By the way, the magnetic recording layer of a photographic film is deteriorated when the magnetic information is repeatedly recorded and reproduced, and the reliability is lowered. However, in the conventional film player, the magnetic recording layer is deteriorated. There is a problem that the life of the film cannot be determined without grasping the usage status of the film.

Further, the number of frames of one roll film can be detected by counting the perforations in a film having perforations corresponding to each frame. There is a problem that the number of all frames cannot be easily grasped because it has to be transported to the last frame. The present invention has been made in view of the above circumstances, and it is possible to prevent the film from being used beyond the life of the film by grasping the life of the film, and the total number of frames without conveying the film to the last frame. It is an object of the present invention to provide a magnetic recording / reproducing method in a film player that can easily grasp the information.

[0006]

In order to achieve the above object, the present invention is a film player which conveys a developed photographic film having a magnetic recording layer from a film cartridge and takes in each frame image through an image sensor. In the film player, the magnetic information is read from the magnetic recording layer when the film is conveyed after the film cartridge is mounted, and the magnetic information is recorded on the magnetic recording layer when the film is conveyed before the film cartridge is taken out. At the time of reading, the number of times the film is loaded is read from the magnetic information recorded in the magnetic recording layer of the leader portion of the film, the number of times of loading is incremented by 1, and the incremented number of times of loading is a predetermined number related to the life of the film. If it exceeds, an alarm will be issued Wherein during recording of the magnetic information, it is characterized in that for recording magnetic information indicating the loading number of times the increment in the magnetic recording layer of the leader portion of the film.

Further, in the film player, when the magnetic information is read, the traveling distance of the magnetic head slid during magnetic recording / reproduction with respect to the film from the magnetic information recorded in the magnetic recording layer of the leader portion of the film is calculated. Along with reading, the traveling distance over which the magnetic head slides is newly measured, and an alarm is issued when the traveling distance obtained by adding the read traveling distance and the measured traveling distance exceeds a predetermined traveling distance related to the life of the film. Occurs,
When the magnetic information is recorded, the magnetic information indicating the added traveling distance is recorded in the magnetic recording layer of the leader portion of the film.

Further, in the film player, at the time of reading the magnetic information, the magnetic head is read from the magnetic information recorded in the magnetic recording layer of the leader portion of the film when the film is loaded and when the magnetic recording / reproduction is performed on the film. Read the sliding distance,
While incrementing the loading count by 1,
A running distance obtained by newly measuring the running distance of the magnetic head, and the incremented number of times of loading exceeds a predetermined number related to the life of the film, or the read running distance and the measured running distance are added. When a predetermined mileage related to the life of the film is exceeded, an alarm is generated, and when the magnetic information is recorded, the magnetic field indicating the incremented number of times of loading and the mileage added to the magnetic recording layer of the leader portion of the film. It is characterized by recording information.

Furthermore, in a film player which conveys a developed photographic film having a magnetic recording layer having perforations corresponding to each frame and end perforations indicating the end of each frame, and which takes in each frame image through an image sensor. In the film player, the magnetic information is read from the magnetic recording layer at the time of transporting the film after mounting the film cartridge, and the magnetic information is recorded on the magnetic recording layer at the time of transporting the film before taking out the film cartridge. When the frame number information cannot be read from the magnetic information recorded on the magnetic recording layer of the leader portion of the film while the film is being read, the perforation is counted by counting the perforation until the end perforation is detected. Film Detecting the number, the time of recording of the magnetic information, is characterized in that for recording magnetic information indicating the number of frames that the detected magnetic recording layer of the leader portion of the film.

[0010]

According to the present invention, when the film of the film cartridge loaded in the film player is conveyed and the magnetic information is read from the magnetic recording layer, the magnetic information recorded in the magnetic recording layer of the reader section of the film is read. The number of times of loading the film is read and the number of times of loading is incremented by one. Then, if the incremented number of times of loading exceeds a predetermined number related to the life of the film, an alarm is generated, and when the magnetic information is recorded on the magnetic recording layer of the film during the transport of the film before the removal of the film cartridge, the film is recorded. The magnetic information indicating the incremented number of times of loading is recorded on the magnetic recording layer of the reader section.

Further, when the film of the film cartridge loaded in the film player is conveyed and the magnetic information is read from the magnetic recording layer, the magnetic information recorded on the magnetic recording layer of the leader portion of the film is used for the film. The distance traveled by the magnetic head during recording / reproduction is read, and the distance traveled by the magnetic head is newly measured. Then, when the traveling distance obtained by adding the read traveling distance and the measured traveling distance exceeds a predetermined traveling distance related to the life of the film, an alarm is generated, and the film is conveyed at the time of film transport before taking out the film cartridge. When recording magnetic information on the magnetic recording layer, magnetic information indicating the added travel distance is recorded on the magnetic recording layer of the leader portion of the film.

Further, when the film of the film cartridge loaded in the film player is conveyed and the magnetic information is read from the magnetic recording layer, the film is loaded from the magnetic information recorded in the magnetic recording layer of the leader portion of the film. The number of times and the distance traveled by the magnetic head during magnetic recording / reproduction for the film are read, the number of times of loading is incremented by 1, and the distance traveled by the magnetic head is newly measured. And
An alarm is issued when the incremented number of times of loading exceeds a predetermined number related to the life of the film, or the mileage obtained by adding the read mileage and the measured mileage exceeds a predetermined mileage related to the life of the film. When the magnetic information is recorded on the magnetic recording layer of the film during the transport of the film before taking out the film cartridge, the incremented number of times of loading and the added traveling distance are added to the magnetic recording layer of the leader portion of the film. The indicated magnetic information is recorded.

From the above, it becomes possible to judge the life of the film. Further, if the frame number information cannot be read from the magnetic information recorded on the magnetic recording layer of the film reader during the film conveyance for reading the magnetic information from the film of the film cartridge loaded in the film player, the film is read. The number of frames of the film is detected by counting the perforations until the end perforations formed in the film are detected. When the magnetic information is recorded on the magnetic recording layer of the film during the transport of the film before taking out the film cartridge, the magnetic information indicating the detected number of frames is recorded on the magnetic recording layer of the leader portion of the film.

As a result, it is possible to detect the total number of frames from the reading of the magnetic information of the reader portion during the film conveyance.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a magnetic recording / reproducing method for a film player according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a structural diagram showing an embodiment of a film player to which the present invention is applied. The film player 10 mainly includes a fluorescent tube 12 for illumination, a photographing lens 14, a CCD circuit unit 18 including a CCD line sensor 16, a film driving mechanism 20, a CPU 22, and the like.

A film cartridge 24 is mounted in the film player 10. A developed still photo film F is pre-wound on a spool 26 in the film cartridge 24. The photo film F is
It is rewound from the film cartridge 24 and conveyed along the guide member 28, and the fluorescent tube 12 and the photographing lens 1
4 and then the take-up spool 32 of the take-up chamber 30.
Be anchored at.

The fluorescent tube 12 is arranged in a direction orthogonal to the transport direction of the film F, and illuminates an image of a frame P (see FIG. 2) of the film F passing therebelow via an infrared cut filter 34. The image light transmitted through the frame P is
CCD line sensor 1 via a monofocal photographing lens 14
An image is formed on the light receiving surface of 6. While the frame P is being photographed by the CCD line sensor 16, the film F is driven by the film drive mechanism 20 at a constant speed in the arrow A direction (hereinafter, referred to as "forward direction") or the arrow B direction (hereinafter, referred to as "reverse direction"). ). Further, the film drive mechanism 20 is controlled by a drive signal output from the CPU 22.

The signal charges read from the CCD line sensor 16 are clamped by a CDS clamp and added to the analog processing circuit 36 as R, G, B signals, where the gains of the R, G, B signals, etc. are applied. Controlled. The R, G, B signals output from the analog processing circuit 36 are
After being converted into a digital signal by the A / D converter 38, it is stored in the frame memory 42 or the RAM (random access memory) 44 of the CPU 22 via the memory controller 40.

Information for one frame of each frame P stored in the frame memory 42 is read by the memory controller 40 and converted into an analog signal by the D / A converter 46, and at the same time, the encoder 48.
Is converted into a video signal and output to the monitor TV 50. Further, the magnetic head 52 and the optical sensors 54A and 54B for detecting the conveyance state are arranged on the conveyance path of the photographic film F. The magnetic head 52 contacts a long magnetic recording layer 56 formed on the outer side of the frame P of the photographic film F shown in FIG. 2, and the information from the magnetic recording / reproducing device 58 shown in FIG. The magnetic data recorded on the magnetic recording layer 56 can be reproduced as well as the magnetic data recorded on the magnetic recording layer 56.

The magnetic recording / reproducing device 58 includes a CPU 22.
Of the digital signal (image data) stored in the RAM 44, the information indicating the shooting condition of the frame P (brightness of the frame or white balance state of the frame) can be output to the magnetic head 52. The optical sensor 54A reads the perforations 60 formed on the photographic film F shown in FIG. 2 and outputs the read information to the CPU 22. The CPU 22 counts the time intervals at which the perforations 60 pass on the basis of the read information at any time, and when the time intervals exceed a predetermined time, the RAM 44 stores information indicating that a jam has occurred during the transportation of the photo film F. Can be stored in memory.

The optical sensor 54B has an end perforation 6 formed behind the final frame shown in FIG.
4 is read and the read information is output to the CPU 22. When the information indicating that the end perforation 64 has been detected is input from the optical sensor 54B, the CPU 22 recognizes that the transportation for all the frames has been completed. A magnetic recording layer 57 is formed on the reader portion R of the photographic film F. The magnetic recording layer 57 is also the magnetic recording layer 56.
Similarly to the above, the magnetic head 52 is contacted, the information from the magnetic recording / reproducing device 58 is recorded by the magnetic head 52, and the magnetic data recorded in the magnetic recording layer 56 is reproduced.

On the magnetic recording layer 57 of the reader section R of the photo film F, as information for grasping the life of the photo film F, running distance status information indicating the sliding distance between the photo film F and the magnetic head 52, and loading. Loading status information indicating the number of times is recorded. The sliding distance between the photographic film F and the magnetic head 52 represents the distance that the photographic film F was conveyed while being in contact with the magnetic head 52, and is in contact with the photographic film F only when the magnetic head 52 performs recording or reproduction. In the case of having such a retracting structure, it represents a value obtained by cumulatively adding the distance traveled by the photo film F after the magnetic head 52 comes into contact with the photo film F until it retracts.

If the magnetic head 52 has a non-evacuation structure in which the magnetic head 52 is always in contact with the photographic film F, the photographic film F
Represents a value obtained by cumulatively adding the distance traveled by.
The magnetic head 52 of the film player of this embodiment has a retractable structure. The film life depending on the sliding distance is set as follows. (Film life) = (total number of frames in film) x (length of magnetic recording layer 56 corresponding to each frame (30 mm)) x (number of transports that can run while sliding with magnetic head (80 times)) .. (1) On the other hand, the film life depending on the number of loadings is set as follows. (Film life) = 40 times (2) Film life for each of which the sliding distance between the photo film F and the magnetic head 52 or the number of times of loading is set as described in (1) and (2) above. When it exceeds the limit, the film image input apparatus 10 gives a warning by an alarm 62.

When calculating the film life based on the sliding distance as described above, information indicating the total number of frames of the film is required. The total number of frames of the film is normally recorded as optical information in the film reader section as a barcode, and the barcode can be read by the barcode reader to recognize the total number of frames. However, since the apparatus becomes expensive when the bar code reader is provided, the film player of this embodiment does not have the bar code reader.
In such a case, since the total number of frames cannot be read from the barcode, the total number of frames of the photographic film F is counted in advance and recorded on the magnetic recording layer 57 of the reader unit R. Then, the total number of frames recorded as this magnetic information is read out, and the film life is calculated by the sliding distance from the above equation (1).

Next, the operation of the film player will be described with reference to the flowchart shown in FIG. First, the power of the film player 10 is turned on (step S100), and it is confirmed whether or not the film cartridge 24 is attached to the film player 10 (step S100).
102), if it is mounted, the forward transport of the photo film F is started (step S104). Then, the magnetic head 52 is driven to come into contact with the photographic film F to start magnetic reproduction (step S106).

Then, when the reader unit R of the photographic film F passes the magnetic head 52 (step S108), the photographic film F recorded on the magnetic recording layer 57 of the reader unit R is read.
The magnetic head 52 reproduces the loading status information indicating the loading frequency and the running distance status information indicating the sliding distance, increments the loading frequency, and records the increment along with the sliding distance in the RAM 44 of the CPU 22 (step S110).

Further, magnetic data indicating the total number of frames is read from the reader unit R of the photographic film F, and the film life according to the sliding distance is calculated from the equation (1) (step S11).
2). Then, the number of times of loading and the sliding distance are read from the RAM 44 and output to the display plate 61 (see FIG. 1) (step S114). When the magnetic data indicating the total number of frames is not recorded in the reader unit R of the photo film F, the photo film F up to the last frame (optical sensor 5
4B) until the end perforation 64 is detected), and the total number of frames is detected from the number of perforations 60 detected by the optical sensor 54A.

The CPU 22 stores the values of the number of times of loading and the sliding distance recorded in the RAM 44 as the respective film life values (the film life of the number of loading times is 40 times, the film life of the sliding distance is the above step S11).
It is determined whether the value is less than or equal to the value calculated in 2) (step S116). When the values of the number of times of loading and the sliding distance recorded in the RAM 44 of the CPU 22 are both less than or equal to the life of the film, the photo film F is conveyed in the forward direction to reproduce the frames from the first frame to the last frame and to reproduce each frame. Various processes such as reading and updating of the magnetic information recorded on the P magnetic recording layer 56 are performed (step S118). CP at this time
U22 detects the distance that the photographic film F has slid with the magnetic head 52, and adds this detected distance to the sliding distance recorded in the RAM 44 (the sliding distance can be detected, for example, by the detected perforation). Is calculated from the number of detected perforations × distance between perforations (30 mm)) (step S
120).

When the film cartridge 24 is taken out of the film player 10, the loading frequency information and the traveling distance status recorded on the magnetic recording layer 57 of the reader section R of the photo film F are recorded as the loading frequency and sliding distance recorded in the RAM 44. It is recorded as information (step S126). The sliding distance is 100
Record in mm.

On the other hand, when one of the values of the number of times of loading and the sliding distance recorded in the RAM 44 of the CPU 22 exceeds the value of the life of the film, the CPU 22 stops the conveyance of the photo film F, and the alarm 62 ( A warning is generated (see FIG. 1) (step S122). Further, a message indicating that the film life has been exceeded is displayed on the display plate 61.

At this time, it is determined by the user's judgment whether or not various processes such as recording / reproducing of magnetic information are forcibly executed (step S124). Then, the process proceeds to S118. On the other hand, if the warning of the life of the film is followed, all the processing is stopped, and the number of times of loading and the sliding distance recorded in the RAM 44 are used as the loading status information and the traveling distance status information in the magnetic recording of the reader section R of the photo film F. Record on layer 57 and end (step S12)
6).

When the total number of frames is not recorded as the magnetic information in the magnetic recording layer 57 of the reader unit R of the photo film F, the loading status information and the traveling distance status information are used as the reader unit R of the photo film F. When recording on the magnetic recording layer 57, the information on the total number of frames is also recorded at the same time. Further, in the above-mentioned embodiment, two kinds of information, the number of times of loading and the sliding distance, are recorded in the magnetic recording layer of the leader portion of the film, and the life of the film is judged from these two kinds of information. Alternatively, only the sliding distance may be recorded on the film, and the life of the film may be judged from this one type of information.

[0033]

As described above, according to the magnetic recording / reproducing method in the film player of the present invention, information indicating the number of times of loading and / or the sliding distance is recorded in the magnetic recording layer of the reader portion of the photographic film, When the magnetic information of the film is recorded / reproduced, the number of times of loading or / and the sliding distance is read, and when the number of times of loading or the sliding distance exceeds the service life of the film, an alarm is issued, so that the service life of the film And you will be able to easily determine the reliability.

Further, by recording magnetic information indicating the total number of frames in the reader section of the photographic film, the total number of frames required for film transport control can be detected without mounting a bar code reader. Therefore, an inexpensive film player can be provided. Furthermore, the total number of frames can be immediately recognized by reading the magnetic information of the reader unit after the film cartridge is loaded, and it is possible to carry up to an arbitrary frame.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a film player according to the present invention.

FIG. 2 is an explanatory view of a photographic film applied to the film player according to the present invention.

FIG. 3 is a flow chart showing the operation of the film player according to the present invention.

[Explanation of symbols]

 10 ... Film image input device 12 ... Fluorescent tube 16 ... CCD line sensor 20 ... Film driving mechanism 22 ... CPU 44 ... RAM 50 ... Monitor TV 52 ... Magnetic heads 54A, 54B ... Optical sensor 62 ... Alarm

Claims (4)

[Claims] 1. A film player which conveys a developed photographic film having a magnetic recording layer from a film cartridge and takes in each frame image through an image sensor, wherein the magnetic recording is performed when the film is conveyed after mounting the film cartridge. In a film player for reading magnetic information from a layer and recording the magnetic information on the magnetic recording layer at the time of transporting the film before taking out the film cartridge, when reading the magnetic information, the magnetic information is recorded on the magnetic recording layer of the leader portion of the film. The number of times the film is loaded is read from the magnetic information stored therein, and the number of loadings is incremented by 1. When the incremented number of loadings exceeds a predetermined number related to the life of the film, an alarm is generated. Film leader A magnetic recording / reproducing method in a film player, characterized in that magnetic information indicating the incremented number of times of loading is recorded on a magnetic recording layer of a part. 2. A film player, which conveys a developed photographic film having a magnetic recording layer from a film cartridge and takes in each frame image through an image sensor, wherein the magnetic recording is performed when the film is conveyed after mounting the film cartridge. In a film player for reading magnetic information from a layer and recording the magnetic information on the magnetic recording layer at the time of transporting the film before taking out the film cartridge, when reading the magnetic information, the magnetic information is recorded on the magnetic recording layer of the leader portion of the film. The traveling distance that the magnetic head slides during magnetic recording / reproduction with respect to the film is read from the stored magnetic information, and the traveling distance that the magnetic head slides is newly measured. The read traveling distance and the measured traveling distance The mileage plus and is related to the film life An alarm is generated when a predetermined traveling distance is exceeded, and when recording the magnetic information, magnetic information indicating the added traveling distance is recorded in the magnetic recording layer of the leader portion of the film. Recording and playback method. 3. A film player which conveys a developed photographic film having a magnetic recording layer from a film cartridge and takes in each frame image through an image sensor, wherein the magnetic recording is performed when the film is conveyed after mounting the film cartridge. In a film player for reading magnetic information from a layer and recording the magnetic information on the magnetic recording layer at the time of transporting the film before taking out the film cartridge, when reading the magnetic information, the magnetic information is recorded on the magnetic recording layer of the leader portion of the film. The number of times the film is loaded and the distance traveled by the magnetic head during magnetic recording / reproduction on the film are read from the stored magnetic information, and the number of times of loading is incremented by 1 and the distance traveled by the magnetic head is newly determined. Measure and increase When the number of loaded times exceeds a predetermined number related to the life of the film, or the running distance obtained by adding the read running distance and the measured running distance exceeds a predetermined running distance related to the life of the film, an alarm is issued. A magnetic recording / reproducing method in a film player, which is generated and records the magnetic information indicating the incremented loading number and the added traveling distance in the magnetic recording layer of the leader portion of the film when the magnetic information is recorded. . 4. A film player which conveys a developed photographic film having a magnetic recording layer having perforations corresponding to each frame and end perforations indicating the end of each frame, and takes in each frame image through an image sensor. In the film player, the magnetic information is read from the magnetic recording layer at the time of transporting the film after mounting the film cartridge, and the magnetic information is recorded on the magnetic recording layer at the time of transporting the film before taking out the film cartridge. If the frame number information cannot be read from the magnetic information recorded in the magnetic recording layer of the film reader during the reading film conveyance, the film is counted by counting the perforations until the end perforations are detected. The number of frames And, wherein during recording of magnetic information, the magnetic recording and reproducing method in film player, characterized in that for recording magnetic information indicating the number of frames that the detected magnetic recording layer of the leader portion of the film.