JPH0882878A - Color film and producing device thereof - Google Patents

Abstract

PURPOSE: To provide the reproducing device of a color film by which the reproducing output of high-grade tone quality can be obtained. CONSTITUTION: By a light source means 4, the data track of the color film 1 obtained by optically executing the multiple recording of at least the digital data of one channel and the control data of one channel on the photoreceptive layer of multilayered structure whose photoreceptive wavelength are mutually different is irradiated with read light. By a color separation means 5, the read light made incident from the light source means 4 through the film 1 is separated to the color components of the respective photoreceptive layers. By a digital data extraction means 6, the read light corresponding to the digital data among the separated color components is received and the digital data is extracted. By a control data extraction means 7, the read light corresponding to the control data among the separated color components is received and the control data is extracted. By a signal processing means 8, a signal is processed based on the digital data extracted by the extraction means 6 and the control data extracted by the extraction means 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color film having a multi-layered photosensitive layer having different photosensitive wavelengths and a reproducing apparatus therefor, and more particularly to a color film having a data track on which digital data is optically recorded. And a reproducing apparatus therefor.

[0002]

2. Description of the Related Art For example, sound recording on a motion picture film used for a movie is constructed by optically recording an analog audio signal. On the other hand, the applicant has already applied for a technique for recording a digital pattern in order to improve the quality of voice (Japanese Patent Application No. 3-22234).
No. 2, Japanese Patent Application No. 3-265001). Further, a motion picture film in which a digital pattern recording area is provided between perforations for film feeding has been proposed (International Publication No. WO92 / 14239).

The motion picture film 100 as described above is shown in FIG.
As shown in, the digital sound tracks 101L and 101R in which digital audio data is recorded, the analog sound tracks 102L and 102R provided to enable the sound reproduction even in the conventional device, and the motion picture film are conveyed for projection. Perforation 1 to do
03L and 103R, and a video recording area 104 in which an image to be projected is recorded.

The digital sound track 101L,
Digital audio data is recorded on 101R by dots D _{30 having a} pitch of 30 μm, for example, as shown in FIG.

More specifically, the above-mentioned motion picture film 1
00, for example, as shown in A of FIG. 9, a blue-sensitive emulsion layer 100 for decomposing and recording red, green, and blue color light.
A color film having _B , a green-sensitive emulsion layer 100 _G, and a red-sensitive emulsion layer 100 _R is used. These three emulsion layers are coated in three layers on a transparent support, so-called base 100 _S.

Therefore, the above digital soundtrack 1
01L, the 101R, for example, by only blue-sensitive emulsion layer 100 _B of the light-sensitive layer of the three layers are photosensitive, as shown in FIG. 2, the opaque dot D _W of the transparent (white) (purple) The audio data of the digital pattern represented by the binary value of the dot D _B is recorded.

The motion picture film 100 as described above is reproduced by a reproducing apparatus as shown in FIG. 10, for example.

That is, the reproducing apparatus includes the film supply reel 110, the film take-up reel 120, and the digital sound tracks 101L, 1L of the motion picture film 100.
The light source 130 that irradiates 01R with white light and the reading lens 1 that forms an image of the reading light from the movie film 100.
40, a digital sound track 101L, receiving processing unit 150 for reading the data pattern recorded in the blue-sensitive emulsion layer 100 _B by receiving the reading light incident through 101R from the light source 130, the light receiving unit 15
It is composed of a clock extraction circuit 160 for extracting a clock signal from the data pattern read by 0, and a signal processing section 170 for performing signal processing based on the clock signal extracted by the clock extraction circuit 160.

Further, the light receiving processing section 150 includes a charge-coupled device (CC) corresponding to the color components of the blue sensitive emulsion layer 100 _B.
The light receiving element 151 is a charge coupled device (D) and a light receiving circuit 152.

The signal processing section 170 is composed of a signal processing circuit 171 and an audio processing circuit 172.

The operation of the reproducing apparatus having the above structure will be described below.

The light source 130 is used for the motion picture film 10.
White light is emitted to the digital sound tracks 101L and 101R of 0.

At this time, the film supply reel 110 is
By driving the film take-up reel 120, the motion picture film 100 runs at a constant speed.

The colored light from the movie film 100 is supplied to the light receiving element 151 via the reading lens 140. The light receiving element 151 is used for the motion picture film 10
Color light from 0 is received, and the received color light is photoelectrically converted and supplied to the light receiving circuit 152 as an electric signal.

The light receiving circuit 152 includes the light receiving element 15
The data pattern recorded on the motion picture film 100 is read by the electric signal from No. 1 and the read data pattern is supplied to the clock extraction circuit 160.

The clock extraction circuit 160 extracts a clock signal from the data pattern from the light receiving circuit 152 and supplies the clock signal and the data pattern from the light receiving circuit 152 to the signal processing circuit 171.

The signal processing circuit 171 uses the clock signal from the clock extraction circuit 160 to subject the data pattern to sampling processing or the like to generate digital data. Then, the generated digital data is supplied to the audio processing circuit 172.

The audio processing circuit 172 performs processing such as demodulation on the digital data from the signal processing circuit 171 and outputs it as reproduced audio data.

That is, the light from the light source 130 is transmitted to the digital soundtracks 101L, 101L of the movie film 100.
Depending on the presence / absence of a dot on the R, light is transmitted or not transmitted, and the received light is detected by the light reception processing unit 150, whereby digital audio data is reproduced.

[0020]

When digital audio data is recorded on a motion picture film, as shown in FIG.
As shown in, the digital soundtrack 101L,
There is no choice but to use a perforation peripheral part such as 101R, and digital audio data must be recorded in a very limited area.

For example, on the digital sound tracks 101L and 101R of the above-mentioned motion picture film 100, as shown in FIG.
Although it was decided that the recording was made with dots D ₃₀ having a pitch of μm, the above digital sound tracks 101L and 101R
When recording data with the same sound quality as that of an optical disc in the upper 1 mm width, (44.1K × 16bit × 2ch) /24=58.8 per frame time.
The amount of information of Kbit will be recorded.

Therefore, in the case of recording about 3000 bits in 1 mm ² , when this is expressed by transparent / opaque binary dots, dots smaller than the dots D _{30 of 30} μm pitch as described above, that is, As shown in 11, about 20
It is necessary to express by dots D ₂₀ of μm pitch.

As described above, since the digital audio data is expressed by binary dots and recorded in a very limited area, the dot size is reduced to record the digital audio data in order to improve the sound quality. Had to do. However, since the smaller the dot size is, the more easily it is affected by dust, scratches, dirt, etc., the dot size is also limited, and the amount of information to be recorded cannot be increased. In addition, the movie film 100
In reproducing, the clock signal used for the sampling process must optically read the data recorded in the digital sound tracks 101L and 101R of the movie film 100, and extract the clock signal from the read data. There wasn't. That is, the data to be recorded on the digital sound tracks 101L and 101R needs to be a data pattern capable of extracting the clock signal, and is limitedly recorded. Further, unless the light receiving element 151 for reading the data recorded by the binary dots on the digital sound tracks 101L and 101R of the movie film 100 and the movie film 100 are accurately positioned,
The clock signal could not be extracted and the correct digital data could not be reproduced. As a result, the sound quality could not be improved.

Therefore, the present invention has been made in view of the conventional circumstances as described above, and has the following objects.

That is, an object of the present invention is to provide a color film capable of improving the recording density of a data track for optically recording digital data and obtaining a reproduction output of high quality sound quality during reproduction. Especially.

Another object of the present invention is to provide a color film reproducing apparatus capable of obtaining reproduction output of high quality sound.

[0027]

In order to solve the above-mentioned problems, a color film according to the present invention is a color film having a multi-layered photosensitive layer having mutually different photosensitive wavelengths, and control data is stored in one photosensitive layer. It is characterized in that it has a data track optically recorded in a layer and digital data optically recorded in at least one other photosensitive layer.

In the color film reproducing apparatus according to the present invention, at least one channel of digital data and control data are optically multiplexed and recorded on a data track of a color film on a photosensitive layer having a multi-layer structure having different photosensitive wavelengths. Light source means for irradiating the light source, color separation means for separating the reading light incident from the light source means through the data track of the color film into color components of the respective photosensitive layers, and respective color components separated by the color separation means. Of the reading light corresponding to the digital data, the digital data extracting means for receiving the reading light to extract the digital data, and the reading light of the respective color components separated by the color separating means corresponding to the control data. By the control data extracting means for receiving the light and extracting the control data, and the digital data extracting means Characterized in that the digital data issued and a signal processing means for performing signal processing based on the control data extracted by the control data extracting means. Further, the color film reproducing apparatus according to the present invention,
The control data is a control clock, and the signal processing means performs sampling processing based on the control data.

[0029]

The color film according to the present invention has a data track in which control data is optically recorded in one photosensitive layer and digital data is optically recorded in at least another photosensitive layer.

In the color film reproducing apparatus according to the present invention, the light source means is a color film data in which at least one channel of digital data and control data are optically multiplex-recorded on a photosensitive layer having a multilayer structure having different photosensitive wavelengths. Irradiate the track with reading light. The color separation means separates the reading light incident from the light source means via the data track of the color film into color components of the respective photosensitive layers. The digital data extraction means receives the reading light corresponding to the digital data among the reading lights of the respective color components separated by the color separating means, and extracts the digital data. The control data extracting means receives the reading light corresponding to the control data among the reading light of each color component separated by the color separating means, and extracts the control data. The signal processing means performs signal processing on the digital data extracted by the digital data extracting means based on the control data extracted by the control data extracting means.

Further, in the color film reproducing apparatus according to the present invention, the signal processing means performs sampling processing based on the control data which is the control clock.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

First, the color film according to the present invention will be described.

For example, as shown in FIG. 1, a motion picture film 1 to which the above-mentioned color film is applied, has digital sound tracks 11L and 11R on which control data and digital audio data are optically recorded, and audio from conventional equipment. Analog soundtracks 12L and 12R provided to enable the reproduction of images, and perforations 13L and 13R for carrying a motion picture film for projection.
And the video recording area 14 in which the image to be projected is recorded.
And.

The motion picture film 1 is a color film having a three-layered photosensitive layer having different photosensitive wavelengths. As shown in FIG. 2, from the upper layer to the blue sensitive emulsion layer 1 _B ,
Each layer is formed on the base 1 _{S in} the order of the green-sensitive emulsion layer 1 _G and the red-sensitive emulsion layer 1 _R.

Therefore, the above digital soundtrack 1
1L, the 11R, the blue-sensitive emulsion layer 1 _B and green-sensitive emulsion layer 1 _G
The control data and the digital audio data are recorded independently of each other by being exposed to light of three kinds of recording wavelengths corresponding to the red sensitive emulsion layer 1 _R.

The control data is a clock signal used in sampling processing or the like when reproducing the motion picture film 1. Then, it is optically recorded in one of the blue-sensitive emulsion layer 1 _B , the green-sensitive emulsion layer 1 _G and the red-sensitive emulsion layer 1 _R , for example, the blue-sensitive emulsion layer 1 _B.

Further, the digital audio data is
For example, it is data compressed by high efficiency encoding or the like. The 1-channel digital audio data is at least one light-sensitive layer other than the blue-sensitive emulsion layer 1 _{B in} which the control data (hereinafter, referred to as a clock signal) is recorded, for example, green. It is recorded by being expressed by multi-valued dots by using two light-sensitive layers of the emulsion layer 1 _G and the red emulsion layer 1 _R. That is, each dot is transparent /
Instead of opaque binary, color information is recorded by using two photosensitive layers and is recorded in multiple values.

Therefore, the above digital soundtrack 1
1L and 11R, for example, the clock signal having the pattern shown in FIG. 3 and the digital audio data having the pattern shown in FIG. 4 are superimposed on the portion 1A on the digital sound tracks 11L and 11R. It is recorded.

The motion picture film 1 as described above is, for example,
It is reproduced by a reproducing apparatus as shown in FIG.

The reproducing apparatus is a color film reproducing apparatus according to the present invention.

That is, the above-mentioned reproducing apparatus includes the film supply reel 2, the film take-up reel 3, and the motion picture film 1.
Light source means 4 for irradiating the digital soundtracks 11L, 11R with reading light, and the digital soundtracks 11L, 11R for the motion picture film 1 from the light source means 4.
The color separating means 5 for separating the reading light incident via the light into the color components of the respective photosensitive layers, and the reading light corresponding to the digital audio data among the reading lights of the respective color components separated by the color separating means 5. Digital data extracting means 6 for receiving and extracting digital audio data, and control data for receiving the reading light corresponding to the clock signal among the reading lights of the respective color components separated by the color separating means 5 and extracting the clock signal. It is provided with extracting means 7 and signal processing means 8 for performing signal processing on the digital audio data extracted by the digital data extracting means 6 based on the clock signal extracted by the control data extracting means 7. The film supply reel 2 and the film take-up reel 3 are each driven by a drive control unit (not shown) so that the traveling speed of the motion picture film 1 becomes constant.

The light source means 4 is, for example, a white light source for irradiating the digital sound tracks 11L and 11R with white light.

The color separation means 5 comprises a reading lens 51.
A color separation prism 52 for separating the reading light incident from the light source means 4 via the digital sound tracks 11L and 11R into color components of the respective photosensitive layers, and of the color components separated by the color separation prism 52. Of these, a mirror 53 for guiding the color component corresponding to the clock signal to the control data extracting means 7.

The digital data extraction means 6 is a charge coupled device (hereinafter, CCD: Charge couple) corresponding to a color component corresponding to digital audio data among the color components separated by the color separation prism 52.
It is called ed device. ) Is a light receiving element 61,
And a light receiving circuit 62.

Here, since the digital audio data is recorded in two photosensitive layers, that is, a green-sensitive emulsion layer and a red-sensitive emulsion layer, the light-receiving element 61 is not shown in the drawing, but the green-sensitive emulsion is not shown. First CCD corresponding to the color component of the emulsion layer
And a second CCD corresponding to the color components of the red-sensitive emulsion layer.

Then, the first CCD and the second C
The CD has a CC with a resolution finer than the recording dots of the digital audio data recorded on the movie film 1.
I am using D.

Although not shown, the light receiving circuit 62 is composed of a first light receiving circuit section and a second light receiving circuit section. The first light receiving circuit section is the first light receiving circuit section.
Data for the reading light received by the CCD of the second CCD is read, and the second light receiving circuit section is
The data for the reading light received by D is read.

That is, the first light receiving circuit section reads the data pattern recorded in the green-sensitive emulsion layer,
The light receiving circuit section reads the data pattern recorded in the red-sensitive emulsion layer.

As described above, the digital data extraction means 6
Are received by the reading light of the color components of the green-sensitive emulsion layer and the reading light of the color components of the red-sensitive emulsion layer, respectively, and are recorded in the data pattern recorded in the green-sensitive emulsion layer and the red-sensitive emulsion layer. Each data pattern is read. Therefore, the digital data extracting means 6 extracts two data patterns recorded on the motion picture film 1.

The control data extracting means 7 is a light receiving element 7 which is a CCD corresponding to a color component corresponding to a clock signal among the color components separated by the color separation prism 52.
1 and a light receiving circuit 72.

The light receiving element 71 is the light receiving element 6 described above.
As in No. 1, a CCD having a resolution finer than the recording dots of the clock signal recorded on the motion picture film 1 is used.

Then, the light receiving circuit 72 reads the data for the reading light received by the light receiving element 71, that is, the data pattern recorded in the blue sensitive emulsion layer, so that the motion picture film 1 is recorded. The clock signal will be extracted. The signal processing means 8
Is a signal processing circuit 81 that performs sampling processing and the like based on the clock signal extracted by the control data extraction means 7, and a mixing processing of digital audio data recorded in the two photosensitive layers of the motion picture film 1. And a voice processing circuit 82 for generating reproduced audio data of one channel.

The signal processing circuit 81 uses the clock signal extracted by the control data extracting means 7,
Sampling processing is performed on each of the two data patterns read by the digital data extracting means 6. In addition, for example, for the loss of data due to dust, scratches, etc. on the motion picture film 1, error correction is performed using the clock signal and output as two digital data.

The voice processing circuit 82 performs demodulation processing and the like on the two digital data that have been subjected to sampling processing and error correction by the signal processing circuit 81, respectively.
Mixing processing or the like is performed to generate 1-channel reproduced audio data.

The operation of the reproducing apparatus having the above configuration will be described.

The light source means 4 emits white light to the digital sound tracks 11L and 11R of the motion picture film 1 shown in FIG.

At this time, a drive control unit (not shown) drives the film supply reel 2 and the film take-up reel 3 so that the motion picture film 1 runs at a constant speed.

The reading light from the movie film 1 enters the color separation prism 52 through the reading lens 5.

The color separation prism 52 separates the reading light from the motion picture film 1 into color components of the respective photosensitive layers of the motion picture film 1.

Of the color components of each photosensitive layer separated by the color separation prism 52, the color light of the color components of the green-sensitive emulsion layer and the red-sensitive emulsion layer in which the data pattern of the digital audio data is recorded is the light receiving element 61. Respectively, and
The colored light of the color component of the blue sensitive emulsion layer in which the data pattern of the clock signal is recorded is guided by the mirror 53 and is incident on the light receiving element 61.

The light receiving element 61 receives the color lights of the color components of the green-sensitive emulsion layer and the red-sensitive emulsion layer from the color separation prism 52, photoelectrically converts them, and outputs them as an electric signal to the light receiving circuit 6.
Output to 2 respectively.

The light receiving circuit 62 reads the data pattern recorded in each of the green-sensitive emulsion layer and the red-sensitive emulsion layer by the electric signal from the light receiving element 61, and the two read data patterns are read by the signal processing circuit. Supply to 81.

On the other hand, the light receiving element 71 receives the color light of the color component of the blue sensitive emulsion layer from the color separation prism 52,
It performs photoelectric conversion and outputs it to the light receiving circuit 72 as an electric signal. The light receiving circuit 72 reads the clock signal data pattern recorded in the blue sensitive emulsion layer by an electric signal from the light receiving element 71, generates a clock signal, and supplies it to the signal processing circuit 81.

The signal processing circuit 81 includes the light receiving circuit 7
Sampling processing for the two data patterns from the light receiving circuit 62 using the clock signal from 2;
Also, it performs processing such as error correction and supplies it as two digital data to the audio processing circuit 82.

The audio processing circuit 82 demodulates the two digital data from the signal processing circuit 81, mixes the two digital data, and outputs the mixed audio data as one-channel reproduced audio data.

As described above, in the digital sound tracks 11L and 11R of the motion picture film 1, one-channel digital audio data and the clock signal used when performing the sampling process are recorded independently on each photosensitive layer. Therefore, the digital audio data is recorded without limitation of the data pattern by the clock signal. As a result, when the movie film 1 on which the digital audio data as described above is recorded is reproduced, reproduced audio data of high quality can be obtained.

Further, the digital audio data is
Multi-valued dot recording is performed using two photosensitive layers. As a result, the size of each dot can be increased, and the effects of dust, scratches, dirt, etc. can be prevented. Therefore, when the movie film 1 is reproduced, reproduced audio data of high quality can be obtained.

In the movie film 1, the 1-channel digital audio data is multi-valued and dot-recorded by using the two photosensitive layers. However, the 2-channel digital audio data is recorded on the two photosensitive layers. May be recorded independently of each other. As a result, when the digital audio data of each channel is expressed in binary with the same dot size as the conventional one, the amount of information recorded in the data track is doubled, so that the recording density can be improved.

The recording dots of the clock signal recorded on the motion picture film 1 have the same size as the dot size of the digital audio data shown in FIG. 4, as shown in FIG. However, for example, as shown in FIG. 6, the dot pitch may be the same.

Further, in the reproducing apparatus, the clock signal recorded on the motion picture film 1 by being superimposed with the digital audio data is extracted, and the sampling process is performed using the clock signal. Therefore, the motion picture film 1 is reproduced.
The digital audio data can be reproduced accurately regardless of the relative position between the light receiving element 61 and the light receiving element 61. Further, when the digital audio data recorded on the motion picture film 1 is missing due to dust, scratches, etc., it is possible to determine whether the missing data is a signal or noise, and the clock signal It can be used to perform error correction. Therefore, since the data can be accurately obtained, it is possible to obtain the reproduced audio data of high quality.

[0072]

The color film according to the present invention has a data track in which control data is optically recorded in one photosensitive layer and digital data is optically recorded in at least another photosensitive layer. With this, when the color film is reproduced, the signal processing can be performed using the control data, so that the sound quality can be improved. Further, since the digital data is recorded on a plurality of photosensitive layers other than the photosensitive layer on which the control data is recorded, the amount of data recorded on the data track can be increased.

In the color film reproducing apparatus according to the present invention, the light source means is a color film data in which at least one channel of digital data and control data are optically multiplex-recorded on a photosensitive layer having a multi-layer structure having different photosensitive wavelengths. Irradiate the track with reading light. The color separation means separates the reading light incident from the light source means via the data track of the color film into color components of the respective photosensitive layers. The digital data extraction means receives the reading light corresponding to the digital data among the reading lights of the respective color components separated by the color separating means, and extracts the digital data. The control data extracting means receives the reading light corresponding to the control data among the reading light of each color component separated by the color separating means, and extracts the control data. The signal processing means performs signal processing on the digital data extracted by the digital data extracting means based on the control data extracted by the control data extracting means. As a result, when data loss due to dust or scratches occurs on the color film, error correction can be performed using the control data, so that sound quality can be improved.

Further, in the color film reproducing apparatus according to the present invention, the signal processing means performs sampling processing based on the control data which is the control clock. Thereby, the sound quality can be further improved.

[Brief description of drawings]

FIG. 1 is a plan view schematically showing the structure of a color film according to the present invention.

FIG. 2 is a side view of the color film, and
It is a figure showing the state seen from the front.

FIG. 3 is a diagram showing recording dots of a clock signal recorded on a digital sound track of the color film.

FIG. 4 is a diagram showing recording dots of digital audio data recorded on a digital sound track of the color film.

FIG. 5 is a diagram showing a configuration of a color film reproducing apparatus according to the present invention.

FIG. 6 shows a pitch of recording dots of a clock signal recorded on a digital sound track of the color film and a pitch of recording dots of digital audio data recorded on the digital sound track by being superimposed with the clock signal. It is a figure showing the case where it made the same.

FIG. 7 is a plan view schematically showing the configuration of a conventional color film.

FIG. 8 is a diagram illustrating a state in which digital audio data is recorded with recording dots having a pitch of 30 μm on a digital sound track of the color film.

FIG. 9 is a side view of the color film, and
It is a figure showing the state seen from the front.

FIG. 10 is a diagram showing a configuration of a conventional color film reproducing apparatus.

FIG. 11 is a diagram showing a state in which digital audio data is recorded in recording dots of a pitch of 20 μm on a digital sound track of the color film.

[Explanation of symbols]

 1 Movie Film 2 Film Supply Reel 3 Film Take-up Reel 4 Light Source Means 5 Color Separation Means 6 Digital Data Extraction Means 7 Control Data Extraction Means 8 Signal Processing Means 51 Reading Lens 52 Color Separation Prism 53 Mirrors 61, 71 Light-receiving Elements 62, 72 Light receiving circuit 81 Signal processing circuit 82 Voice processing circuit

Claims (3)

[Claims] 1. A color film having a multi-layered photosensitive layer having different photosensitive wavelengths, wherein control data is optically recorded on one photosensitive layer and digital data is optically recorded on at least one other photosensitive layer. A color film having a data track recorded on. 2. Light source means for irradiating reading light onto a data track of a color film in which digital data and control data of at least one channel are optically multiplexed and recorded in a photosensitive layer having a multi-layered structure having mutually different photosensitive wavelengths, and said light source. Means for separating the reading light incident from the means via the data track of the color film into color components of the respective photosensitive layers, and the digital data of the reading light of the respective color components separated by the color separating means. Digital data extraction means for receiving corresponding reading light to extract digital data, and reading light corresponding to the control data among the reading light of each color component separated by the color separating means, for extracting control data Control data extracting means, and the control data on the digital data extracted by the digital data extracting means. Reproducing apparatus of the color film, characterized in that it comprises a signal processing means on the basis of the control data extracted by the data extracting means performs signal processing. 3. The color film reproducing apparatus according to claim 2, wherein the control data is a control clock, and the signal processing means performs sampling processing based on the control data.