JP3500207B2 - Motion picture film and motion picture film reproducing apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for recording and reproducing a digital pattern as a soundtrack of a movie film.

[0002]

2. Description of the Related Art In a conventional motion picture film, a video recording area is arranged in a frame shape at a substantially central portion of the film, and film winding holes for film winding are provided on both sides of the video recording area. There is some perforation. An analog sound track is provided linearly along the winding direction of the film between the image recording area and either one of the perforations.
Audio signals were recorded in analog on this analog soundtrack.

However, with the development of digital technology in recent years, there has been a movement to digitally record audio signals. The recording positions of the video recording area and the analog soundtrack are SMPTE (Society of Motio) which is an association of movie and television engineers in the United States.
n Picture and Television Engneers), the audio data obtained by digitizing the audio signal is recorded at a position other than the recording position such as the video recording area or the analog sound track.

Specifically, as the audio data, audio data for the right channel and audio data for the left channel are formed, and these are, for example, between the perforations and the edges of the motion picture film. It is recorded linearly on each digital soundtrack provided along the direction of film travel.

Each audio data recorded in each digital sound track is composed of synchronization data, audio data, a tracking pattern, etc. recorded in a direction orthogonal to the moving direction of the motion picture film.
The synchronization data is recorded at the beginning of a block of a predetermined number of data, and subsequently, the audio data is recorded in block units. The tracking pattern is recorded at the recording start portion and the recording end portion of the audio data, respectively, and as a whole, it is striped on both sides of the digital sound track along the moving direction of the motion picture film. It will be recorded.

In a motion picture film reproducing apparatus for reproducing the audio data from the motion picture film, two CCD line sensors provided so as to scan each digital sound track of the motion picture film are used to reproduce the audio data of each channel. And so on. The CCD line sensor has a reading area for one line provided in a direction orthogonal to the moving direction of the motion picture film, and at the time of reproduction, the light emitted from the back surface of the motion picture film emits light of the motion picture film. The reading areas are illuminated through a digital soundtrack. As a result, the reading area of the CCD line sensor is irradiated with the synchronization data, the audio data and the tracking pattern recorded on the digital sound track after being converted into light.

The CCD line sensor receives the lighted sync data, audio data and tracking pattern, converts the light into an electric signal, and supplies the electric signal to a data processor. The data processing unit reproduces the audio data for each block in synchronization with the synchronous data and supplies the audio data to the D / A converter. The D / A converter analogizes the audio data to form an audio signal, and supplies the audio signal to the speaker device. As a result, a voice output corresponding to the audio data can be obtained via the speaker device.

Further, the data processing section detects a tracking pattern from the CCD line sensor and performs tracking control. As described above, the tracking pattern is recorded at the recording start position and recording end position of one line of audio data. Therefore, the data processing unit detects a tracking error by detecting, for example, a level difference between the tracking pattern reproduced at the recording start position and the tracking pattern reproduced at the recording end position. Then, the read timing of the CCD line sensor is variably controlled according to the tracking error.

Thus, the tracking error can be corrected and the audio data can always be reproduced in the just track state.

[0010]

However, in the conventional motion picture film, since the tracking pattern is recorded at the recording start position and the recording end position of the audio data, the data area of the audio data is eroded. Therefore, there is a problem that the data amount of the audio data must be reduced inevitably.

In order to obtain a good quality voice, it is preferable that the audio data has a large data amount. Further, the tracking pattern is indispensable for accurately reproducing the audio data.

The present invention has been made in view of the above problems, and it is possible to accurately reproduce audio data while tracking and to increase the amount of audio data. The purpose is to provide a film.

[0013]

A motion picture film according to the present invention is a motion picture film in which a digital sound track on which audio data is recorded is formed along a film running direction, and the digital sound track is a film running film. A data pattern of audio data is recorded in block units on data tracks which are orthogonal to the direction and are arranged in parallel along the film running direction, and a tracking pattern indicating the position of each data track in track units is recorded in each data track. The above problem is solved by a feature that an inclination detection pattern, which is recorded on one side along the film running direction and indicates the inclination of each data track in block units, is recorded in the data tracks in block units.

Further, the motion picture film according to the present invention solves the above-mentioned problems by being characterized in that the tracking pattern is recorded on the film edge side of the digital sound track.

Further, in the motion picture film according to the present invention, the tracking pattern is composed of a plurality of columns, and each column has a plurality of columns.
This is a repeating pattern for each dot, and
Print patterns are on the other side of the film running direction.
It is arranged so that it is offset by 1 dot from the dot pattern in the column
The dots in each row are the data of the data track.
The above problem is solved by being recorded at a position displaced by a predetermined amount in the film running direction with respect to the pattern .

Next, in the motion picture film reproducing apparatus according to the present invention, a data pattern of audio data is recorded in block units on data tracks which are orthogonal to the film running direction and arranged in parallel along the film running direction. In addition, a tracking pattern indicating the position of each data track in track units is recorded on one side of each data track along the film running direction, and a tilt detection pattern indicating the tilt of each data track in block units is used in the above data. A reproducing device for a motion picture film in which a digital sound track recorded on the track is formed along the film running direction, and reproducing means for optically reading the digital sound track and reproducing a tracking pattern from the reproducing means. Tracking of the reproducing means based on the signal Tracking error detection means for detecting a tracking error, inclination detection means for detecting the inclination of each data track in block units based on the reproduction signal of the inclination detection pattern from the reproduction means, and the tracking error detection means. A tracking error correcting means for correcting the tracking error of the reproducing means on the basis of the tracking error and the detection output of the inclination detecting means, and while correcting the tracking error of the reproducing means by the tracking error correcting means, The above-mentioned problem is solved by the feature that the digital sound track is read by the reproducing means.

Further, in the motion picture film reproducing apparatus according to the present invention, the reproducing means optically reads a digital sound track having a tracking pattern recorded on the film edge side to solve the above-mentioned problems. .

Further, in the motion picture film reproducing apparatus according to the present invention, the reproducing means is the tracking pattern.
Is composed of multiple rows, and each row repeats every 1 dot
Pattern, the dot pattern in one row is the film
Dot pattern of the other row along the running direction of
The dots in each row are arranged so that they are offset by one dot.
For the data pattern of the above data track.
The above problem is solved by optically reading a digital sound track recorded at a position displaced by a predetermined amount in the running direction of the rum .

The motion picture film according to the present invention is a motion picture film in which a digital sound track on which audio data is recorded is formed along the film running direction, and the digital sound track is orthogonal to the film running direction. Data patterns of audio data are recorded in block units on data tracks arranged in parallel along the film running direction, and a tracking pattern indicating the position of each data track in track units is run on one side of each data track. The above problem is solved by being recorded at a position shifted by 90 ° with respect to the data pattern of the data track along the direction.

Further, in the motion picture film reproducing apparatus according to the present invention, the data pattern of the audio data is recorded in block units on the data tracks which are orthogonal to the film running direction and arranged in parallel along the film running direction. At the same time, a digital sound track is formed in which a tracking pattern indicating the position of each data track in track units is recorded on one side of each data track at a position shifted by 90 ° with respect to the data pattern of the data track along the film running direction. A playback device for a movie film formed along a film running direction, wherein playback means for optically reading the digital sound track, and a playback signal of a tracking pattern from the playback means,
A tracking error detecting unit for detecting a tracking error of the reproducing unit; and a tracking error correcting unit for correcting the tracking error of the reproducing unit based on the tracking error detected by the tracking error detecting unit. To solve the above-mentioned problems, the digital sound track is read by the reproducing means while correcting the tracking error of the reproducing means by the error correcting means.

In the motion picture film reproducing apparatus according to the present invention, the reproducing means detects the reproduction level of the tracking pattern of the digital sound track read by the reproducing means, and the reproduction of the tracking pattern detected by the detecting means. The above-mentioned problem is solved by including level adjusting means for adjusting the level of the data pattern of the digital sound track read based on the level.

Further, in the motion picture film reproducing apparatus according to the present invention, the reproducing means detects the reproduction level of the tracking pattern of the read digital sound track, and the tracking pattern detected by the level detecting means. A threshold value is determined based on a reproduction level, and a binarizing unit that binarizes a reproduction signal of a data pattern of a digital sound track based on the determined threshold value is provided. Solve.

[0023]

The motion picture film according to the present invention is provided linearly along the film running direction, for example, in each of the extra areas between the perforations provided on both sides of the image area and the edge of the film. There are two digital sound tracks for the right channel and the left channel, and the data pattern of the audio data is arranged on each digital sound track so as to be orthogonal to the film running direction and arranged in parallel along the film running direction. Is recorded in block units to form a data track. In addition, a tracking pattern indicating the position of each data track in data track units is recorded along one side of each data track along the film running direction, and a tilt detection pattern indicating the tilt of each data track in block units. To record on the data track.

Specifically, on the film edge side or the image area side of the digital sound track, a tracking pattern indicating the position of each data track in track units is recorded on one side of each data track along the film running direction , The tracking pattern has multiple columns
Each row is a repeating pattern of 1 dot
The dot pattern in one row is in the running direction of the film.
Along with the dot pattern of the other row along with one dot
The dots in each column above are
In the film running direction with respect to the track data pattern
It is recorded at a position displaced by a predetermined amount .

The audio data, the tracking pattern and the inclination detection pattern recorded on the motion picture film according to the present invention are reproduced by the motion picture film reproducing apparatus according to the present invention described below.

That is, in the motion picture film reproducing apparatus according to the present invention, the inclination detecting pattern, the tracking pattern and the audio data recorded in the digital sound track are optically read by the reproducing means.

Specifically, the reproducing means is recorded along with the tilt detection pattern and the audio data on the film edge side of the digital sound track along the film running direction, and is composed of a plurality of columns, each column being
This is a repeating pattern for each dot, and
Print patterns are on the other side of the film running direction.
It is arranged so that it is offset by 1 dot from the dot pattern in the column
The dots in each row are the data of the data track.
Position displaced from the pattern by a predetermined amount in the film running direction
The tracking pattern recorded on is optically read, the tracking pattern is supplied to the tracking error detecting means, and the tilt detecting pattern is supplied to the tilt detecting means.

The tracking error detecting means detects a tracking error of the reproducing means based on the reproduction signal of the tracking pattern from the reproducing means, and supplies the detection output to the tracking error correcting means.

The inclination detecting means detects the inclination of each data track in block units based on the reproduction signal of the inclination detecting pattern from the reproducing means, and supplies the detection output to the tracking error correcting means. .

The tracking error correcting means corrects the tracking error of the reproducing means based on the detection output indicating the tracking error from the tracking error detecting means and the detection output indicating the inclination of the film from the inclination detecting means. To do.

As a result, the audio data and the like can be read while correcting the tracking error, and the audio data and the like can be read accurately.

When the tracking pattern is recorded on both sides of each data track, the tracking error correction capability is improved, but the data recording area of audio data is reduced by the provision of the tracking pattern on both sides of each data track.

However, in the present invention, since the recording of the tracking pattern is performed on only one side, the recording area of the audio data can be widened, and the data amount of the audio data to be recorded can be increased. You can Moreover, instead of recording the tracking pattern on only one side, the inclination detection pattern is recorded for each block, and the tracking error is corrected based on each detection output of the tracking pattern and the inclination detection pattern. The recording area for the audio data can be expanded without lowering the tracking error correction capability.

Further, in the motion picture film reproducing apparatus according to the present invention, the reproduction level of the tracking pattern of the digital sound track read by the level detecting means of the reproducing means is detected, and the tracking pattern detected by the level adjusting means by the detecting means. Adjust the level of the read digital soundtrack data pattern based on the playback level.

Thus, the level of the data pattern of the digital sound track can be adjusted based on the level of the tracking pattern of the digital sound track.

Further, in the motion picture film reproducing apparatus according to the present invention, the tracking level detected by the level detecting means of the reproducing means is detected by the level detecting means and the binarizing means is detected by the level detecting means. The threshold value is determined based on the reproduction level of the pattern, and the reproduction signal of the data pattern of the digital sound track is binarized based on the determined threshold value.

As a result, the reproduction signal of the data pattern of the digital sound track can be binarized by the threshold value corresponding to the reproduction level of the data pattern of the digital sound track.

[0038]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a motion picture film and a motion picture film reproducing apparatus according to the present invention will be described below in detail with reference to the drawings.

The motion picture film 1 according to the embodiment of the present invention is
As shown in FIG. 1, a video recording area 2 in which an image to be projected is recorded, and film winding holes (perforations) provided on both sides of the video recording area 2 for winding the movie film 1 respectively. 3L, 3R, the video recording area 2 and the perforations 3L, 3
The analog soundtracks 4L and 4R linearly provided in one of the two gaps existing between R along the traveling direction of the film, and the perforation portions 3L and 3R and the film. Between both edges, it has digital sound tracks 5L and 5R linearly provided along the traveling direction of the film.

In the analog soundtrack 4L,
An analog audio signal for the left channel is recorded, and an analog audio signal for the right channel is recorded on the analog sound track 4R.

Also, the above digital sound track 5L
The digital audio data for the left channel is recorded on the digital audio track, and the digital audio data for the right channel is recorded on the digital sound track 5R.

Specifically, the digital sound track 5L has a center channel (C), a left channel (L), a center left channel (LC), a surround left channel (SL), and a subwoofer channel (SW).
Are recorded in order. In addition, right channel (R), center right channel (RC), surround right channel (S
A right mix channel (RM) is formed from R), which is recorded next to the subwoofer channel (SW). That is, the C, L, LC, SL, SW, and RM are recorded in the digital sound track 5L as a set of left channel audio data.

In the digital soundtrack 5R,
A center channel (C), a right channel (R), a center right channel (RC), a surround right channel (SR), and a subwoofer channel (SW) are recorded in order. Further, a left mix channel (LM) is formed from the left channel (L), the center left channel (LC), and the surround left channel (SL), which is recorded next to the subwoofer channel (SW). That is, the digital sound track 5R includes the channels (C), (L), (LC), (SL), (S).
W), (LM) audio data Cn, Ln, LC
n, SLn, SWn, LMn are recorded as a set of right channel audio data.

Here, subscripts such as "n" and "n-α" shown in FIG. 1 indicate the order of time series. For example, Cn of the digital sound track 5L indicates that it is the n-th time series of the center channel (C), while Cn-α of the digital sound track 5R.
Indicates that it is the (n-α) th time series of the center channel (C). That is, the digital sound track 5R indicates that data delayed by α from the digital sound track 5L is recorded.

For example, in FIG. 2, the left of the same timing as the audio data for the right channel recorded on the digital sound track 8R at the intermediate position (the reference point 8RB in the figure) of the frame 7 of the movie film 1. Audio data for a channel is 17.8 frames (4EC
It is recorded at a position of 8 LB on the digital sound track 8L.

For this reason, the audio data for the image of the frame 7 is reproduced earlier in the audio data for the right channel than in the audio data for the left channel.

The analog sound tracks 4L, 4
Audio data 9LR with the same timing on R
B is recorded 20.5 frames ahead of the reference point 8R.

Next, on the motion picture film 1 as described above, the audio data and the like are recorded by a motion picture film recording apparatus as shown in FIG.

The motion picture film recording apparatus uses the left mix channel (L) from the audio data Ln, LCn, SLn of the respective channels (L), (LC), (SL).
Mixer 11L forming data LMn of M) and data R of each channel (R), (RC), (SR)
n, RCn, SRn to right mix channel (RM)
11R for forming the data RMn of the left and the encoder 12a for encoding the audio data of the left channel system.
12f, encoders 12g to 12l for encoding right channel audio data, and encoders 12a to 1 described above.
A left-channel multiplexer 13L for serially transmitting the left-channel audio data encoded by 2f, and a right-channel multiplexer 13L for serially transmitting the right-channel audio data encoded by the encoders 12g to 12l. It has a multiplexer 13R.

The movie film recording apparatus further includes an error correction data adding device 15L for adding an error correction code (ECC) to the left channel audio data.
A delay memory 14R for delaying and outputting the right channel audio data from the multiplexer 13R by a predetermined time, and an error correction for adding an error correction code to the right channel audio data from the delay memory 14R. A data adding device 15R and a modulator 16L, 1 for performing a predetermined modulation process on the audio data of each channel system to which the error correction code is added.
A recorder 1 for recording 6R and audio data of each channel subjected to the predetermined modulation processing on the digital sound tracks 5L, 5R of the motion picture film 1, respectively.
It has 7L and 17R.

Next, the operation of this movie film recording apparatus will be described.

First, the audio data Cn of the center channel (C) in FIG.
a, 12g, also subwoofer channel (SW)
Audio data SWn of the encoder 12e, 12
respectively supplied to k. In addition, the audio data Ln of each channel (L), (LC), (SL),
LCn and SLn are the encoders 12b to 12d, respectively.
To each channel (R), (RC), (S
The audio data Rn, RCn, SRn of R) are supplied to the encoders h to j, respectively. Also, the audio data Ln, LCn, SLn of the respective channels (L), (LC), (SL) are respectively the mixer 11L.
To each channel (R), (RC), (S
The R) audio data Rn, RCn, and SRn are supplied to the mixer 11R, respectively.

The mixer 11L has audio data Ln, Ln for the channels (L), (LC), (SL).
Left mix channel (LM) from LCn, SLn
The audio data LMn of the above is formed and is supplied to the encoder 12l. Also, the mixer 11R forms audio data RMn of the right mix channel (RM) from the audio data Rn, RCn, SRn of the channels (R), (RC), (SR), which is then encoded by the encoder. Supply to 12f.

The encoders 12a to 12f have the channels (C), (L), (LC), (SL) and (S).
W), (RM) audio data Cn, Ln, LC
n, SLn, SWn, and RMn are left-channel audio data, and high-efficiency coding (ATRAC) processing combining band division coding, orthogonal transform coding, bit allocation, and the like is applied to each of them to obtain a data amount. 1/5
, And supplies them to the multiplexer 13L.

The encoders 12g to 12l have channels (C), (R), (RC), (SR), and
(SW), (LM) audio data Cn, Rn, R
Cn, SRn, SWn, LMn are used as right channel audio data, and high efficiency coding processing is performed by combining these with band division coding, orthogonal transform coding, bit allocation, etc., and the data amount is reduced to 1/5. It is compressed and supplied to the multiplexer 13R.

The multiplexer 13L receives the left-channel audio data supplied in parallel from each of the encoders 12a-12f as Cn, Ln, LCn, SL.
Serial conversion is performed in the order of n, SWn, RMn, and this is supplied to the error correction data adding circuit 15L.

The multiplexer 13R converts the right channel audio data supplied in parallel from the encoders 12g to 12l into Cn, Rn, RC.
Serial conversion is performed in the order of n, SRn, SWn, LMn, and this is supplied to the delay memory 14R.

The delay memory 14R stores the right channel audio data so that the recording positions of the left channel audio data and the right channel audio data are deviated by 17.8 frames as described above. Is delayed by 17.8 frames and is supplied to the error correction data adding circuit 15R.

Each error correction data adding circuit 15L,
The 15R adds a code for error correction of C2 parity and C1 parity using a cross interleaved Reed-Solomon code to each audio data, and supplies this to the modulators 16L and 16R.

The modulators 16L and 16R add synchronization data, tracking patterns, etc. to the audio data and supply them to the recorders 17L and 17R.

The recorders 17L and 17R store the audio data in the digital sound tracks 5L and 5L of the motion picture film 1 for each film block, which will be described later.
Digitally record to 5R.

That is, this digital recording is performed on the basis of one compression processing block.

The left channel audio data of one compression processing block is the same as the auxiliary data U0 to U11 of 12 bytes (1 byte = 1 symbol = 8 bits: b0 to b7) shown in FIG. 4A. 1-byte header H0 shown in FIG. 7B and center-channel audio data C0 to C186 of 187 bytes shown in FIG.
The left center channel audio data LC0 to LC179 for 180 bytes shown in FIG. 7D, the left channel audio data L0 to L179 for 180 bytes shown in FIG. Surround left channel audio data S for 178 bytes shown in
L0 to SL177 and right mix channel audio data RM0 to RM for 119 bytes shown in FIG.
M118 In addition, the above level control data is, when the audio data of the right mix channel is formed,
The level of the audio data of the right channel, the level of the audio data of the right center channel, and the level of the audio data of the surround right channel are each represented by 1 byte.

Each audio data of one compression processing block of the left channel system is symbol-by-symbol along the film traveling direction as shown in FIG. 5, and the audio data of this one symbol is orthogonal to the film traveling direction. It is recorded so as to be juxtaposed in the direction.

In FIG. 5, first, in the first data string R00, the auxiliary data U0 to U for the above 11 symbols is provided.
11 is recorded, followed by the header H0 for one symbol described above, followed by 30 of the audio data of the center channel for 187 symbols.
Center channel audio data for symbols C
0 to C29 are recorded.

Further, the second to fourth data strings R01 to R0
3, the center channel audio data of 187 symbols, the center channel audio data of 43 symbols C30 to C72, C73 to C73.
C115 and C116 to C158 are recorded respectively.

In the fifth data string R04, the above 1
Of the 87-symbol center-channel audio data, the remaining 28-symbol center-channel audio data C159 to C186 are recorded, followed by 15 symbols of the 180-symbol left-center-channel audio data. The left center channel audio data LC0 to LC14 of is recorded.

Also, the sixth to eighth data strings R05 to R0
In FIG. 7, 43 symbols of left center channel audio data LC15 to LC57, L of the 180 symbols of left center channel audio data are shown.
C58-LC100, LC101-LC143 are recorded.

In the ninth data string R8, the above 18
Of the 0-symbol left-center-channel audio data, the remaining 36-symbol left-center-channel audio data LC144 to LC179 are recorded, followed by 7-symbols of the 180-channel left-channel audio data. The left-channel audio data L0 to L6 are recorded.

The tenth to thirteenth data strings R9 to R
Reference numeral 12 denotes audio data L7 to L49, L50 to L92, L93 for left channels of 43 symbols of the left channel audio data for 180 symbols.
-L135 and L136-L178 are recorded respectively.

In the fourteenth data string R13, left channel audio data L179 for the remaining one symbol of the left channel audio data for 180 symbols is recorded, and subsequently, for the 178 symbols. Of the surround left channel audio data, 42 symbols of surround left channel audio data SL0 to SL41 are recorded.

The fifteenth to seventeenth data strings R14-
R16 includes audio data SL42 to SL of 43 symbols of the surround left channel of the 178 symbols of the audio data of the surround left channel.
84, SL85-SL127, SL128-SL170
Are recorded respectively.

Further, in the eighteenth data string R17, of the surround left channel audio data for 178 symbols, the remaining six symbols of surround left channel audio data SL171 to SL177 are recorded. 36 symbols of the 119-symbol right mix channel audio data, and 4th of the 119-symbol right mix channel audio data in the 19th data string R18.
Audio data RM36 to RM78 of the right mix channel for 3 symbols is recorded.

In the twentieth data string R19, of the 119-symbol right mix channel audio data, the remaining 40 symbols of right mix channel audio data RM79 to RM118 are recorded. The level control data Le0 to Le2 of the above three symbols are recorded.

Next, as the right-channel audio data of one compression processing block, 12 shown in FIG.
Bytes (1 byte = 1 symbol = 8 bits: b0 to b
7) auxiliary data U0 to U11 and 1 shown in FIG.
Byte header H0 and 126-byte center channel audio data C0 to C shown in FIG.
186 and 180 bytes of right center channel audio data RC0 to RC179 shown in FIG.
180-byte right channel audio data R0 to R179 shown in FIG. 8E, 178-byte surround right channel audio data SR0 to SR177 shown in FIG. Shown in 119
Left mix channel audio data L for bytes
M0 to LM118 and 61-byte surround channel audio data SW0 to SW6 shown in FIG.
0 and 3 bytes of level control data shown in FIG. 7I are recorded.

The level control data is
The left-channel audio data level, the left-center channel audio data level, and the surround left-channel audio data level when the left-mix channel audio data is formed are each represented by 1 byte.

Each audio data of one compression processing block of the right channel system is, as shown in FIG. 7, for each symbol along the moving direction of the film, and the audio data of this one symbol is orthogonal to the moving direction of the film. It is recorded so as to be juxtaposed in the direction.

In FIG. 7, first, in the first data string R00, the auxiliary data U0 to U for the above 11 symbols is provided.
11 is recorded, followed by the header H0 for one symbol described above, followed by 30 out of the audio data of the center channel for 126 symbols.
Center channel audio data for symbols C
0 to C29 are recorded.

Also, the second and third data strings R01 to R0
2 includes audio data C30 to C72, C73 to C43 of the center channel of 43 symbols of the audio data of the center channel of 126 symbols.
C115 is recorded respectively.

In the fourth data string R03, the above 1
Of the 26-symbol center-channel audio data, the remaining 10-symbol center-channel audio data C116 to C125 are recorded, followed by 33 symbols of the 180-symbol right-center-channel audio data. The left center channel audio data RC0 to RC32 are recorded.

Also, the fifth to seventh data strings R04 to R0
Reference numeral 6 denotes audio data RC33 to RC75, R of 43 symbols of the right center channel out of the audio data of the right center channel of 180 symbols.
C76 to RC118 and RC119 to RC161 are recorded.

In the eighth data string R7, the above 18
Of the 0-symbol right center channel audio data, the remaining 18-symbol right center channel audio data RC162 to RC179 are recorded, followed by 25 symbols of the 180-channel right channel audio data. The right channel audio data R0 to R24 are recorded.

Further, the ninth to eleventh data strings R8 to R1
0 represents audio data R25 to R67, R68 to R110, R1 of right channels of 43 symbols of the right channel audio data of 180 symbols.
11 to R153 are recorded respectively.

In the twelfth data string R11, the right channel audio data R154 to R179 of the remaining 26 symbols of the right channel audio data of 180 symbols are recorded, followed by the 178 symbols. Of the surround right channel audio data for 17 minutes, audio data SR0 to SR16 for the surround right channel for 17 symbols is recorded.

The thirteenth to fifteenth data strings R12 to
In R14, 43 right surround right channel audio data SR17 to SR of the 178 right surround right channel audio data.
59, SR60 to SR102, SR103 to SR145
Are recorded respectively.

In the 16th data string R15, of the surround right channel audio data of 178 symbols, the remaining 32 symbols of surround right channel audio data SR146 to SR177 are recorded. Of the 119-symbol left mix channel audio data, the 11-symbol left mix channel audio data LM0 to
LM10 is recorded.

The seventeenth and eighteenth data strings R16,
In R17, the left mix channel audio data LM11 to LM5 of 43 symbols of the left 119 symbol left mix channel audio data.
3, LM54 to LM96 are recorded respectively.

In the nineteenth data string R18, the left 22-channel left-mix channel audio data LM97 to LM118 of the 119-symbol left-mix channel audio data are recorded. Of 61-symbol surround-channel audio data, 21-symbol surround-channel audio data SW0 to SW20
Is recorded.

In the twentieth data string R19, of the 61-symbol surround-channel audio data, the remaining 40-symbol surround-channel audio data SW21 to SW60 are recorded, followed by the 3 symbols. Of the level control data Le0 to Le2 are recorded.

That is, in FIG. 5 and FIG. 7, the one compression processing block corresponds to each of the data strings R00 to R19.
It is formed by recording each of the 43 symbols of audio data.

Here, the data of one compression processing block described above can be configured as follows.

That is, as the left-channel audio data of one compression processing block, the header H0 for one byte (1 byte = 1 symbol = 8 bits: b0 to b7) shown in FIG. 3 bytes of level control data Le0 to Le2 shown in (b), 182 bytes of center channel audio data C0 to C181 shown in (c), and 1 shown in (d) of FIG.
82 bytes of left center channel audio data LC0 to LC181 and 182 bytes of left channel audio data L0 to L181 shown in FIG.
182 bytes of surround left channel audio data SL0 to SL181 shown in (f), 114 bytes of right mix channel audio data RM0 to RM113 shown in (g), and (h) of FIG. )
6 bytes of subwoofer channel audio data SW′0 to SW′5 and 8 bytes of user data U0 to U7 shown in FIG. 7I are recorded.

The level control data is
When the right mix channel audio data is formed, the level of the right channel audio data, the level of the right center channel audio data, and the level of the surround right channel audio data are each represented by 1 byte.

Each audio data of one compression processing block of the left channel system is symbol-by-symbol along the moving direction of the film as shown in FIG. 9, and the audio data of this one symbol is orthogonal to the moving direction of the film. It is recorded so as to be juxtaposed in the direction.

In FIG. 9 above, first, a header H0 for 1 byte is recorded in the first data string R00, and subsequently, level control data Le0 for 3 bytes is recorded.
To Le2, and subsequently, audio data C0 to C38 for 39 symbols of the audio data of the center channel for 182 symbols is recorded.

The second to fourth data strings R01 to R0 are also included.
3 includes audio data C39 to C81, C82 to C124, and C125 of 43 symbols of the center channel audio data of 182 symbols.
~ C167 is recorded.

In addition, in the fifth data string R04, the above 1
Of the 82-symbol center channel audio data, the remaining 14-symbol audio data C1
68 to C181 are recorded, followed by 29 symbols of audio data LC0 to LC28 of the left center channel audio data of 182 symbols.
Is recorded.

Also, the sixth to eighth data strings R05 to R0
In the left center channel audio data of 182 symbols, 43 symbols of the left center channel audio data LC29 to LC7.
1, LC72 to LC114, LC115 to LC157 are recorded.

Further, in the ninth data string R8, the above 18
Out of the audio data of the left center channel for 2 symbols, the audio data LC for the remaining 24 symbols
158 to LC181 are recorded, and subsequently, 19 symbols of audio data L0 to L18 of the left channel audio data of 182 symbol blocks are recorded.

The tenth to twelfth data strings R9 to R
Reference numeral 11 denotes audio data L19 to L61, L62 to L104, L105 to L for 43 symbols of the left channel audio data for 182 symbols.
147 is recorded.

In the thirteenth data string R12, the audio data L148 for the remaining 34 symbols of the left-channel audio data for 182 symbols is left.
To L181 are recorded, and subsequently, audio data SL0 to SL8 for 9 symbols of the surround left channel audio data of 182 symbol blocks is recorded.
Is recorded.

The 14th to 17th data strings R13 to
In R16, audio data SL9 to SL51 and SL52 to SL9 corresponding to 43 symbols of the surround left channel audio data corresponding to 182 symbols are included.
4, SL95 to SL137, SL138 to SL180 are recorded.

In the eighteenth data string R17, of the 182 symbols worth of surround left channel audio data, the remaining one symbol worth of audio data SL181 is recorded, followed by 114 symbols of right mix. 4 of the channel audio data
Two symbols of audio data RM0 to RM41 are recorded.

The nineteenth data string R18 contains audio data RM corresponding to 43 symbols of the 114-symbol right mix channel audio data.
42 to RM84 are recorded.

Further, in the twentieth data string R19, of the 114-symbol right mix channel audio data, the remaining 29 symbols of audio data RM85 to RM113 are recorded, followed by a 6-symbol subwoofer. Channel audio data S
W'0 to SW'5 are recorded, and further 8 after this
User data U0 to U7 of symbols are recorded.

As the right channel audio data of one compression processing block, 1 shown in FIG.
Byte header H0 (1 byte = 1 symbol = 8 bits: b0 to b7), level control data Le0 to Le2 for 3 bytes shown in FIG. 7B, and FIG.
62 bytes of subwoofer channel audio data SW0 to SW61 shown in FIG.
2 bytes of right center channel audio data RC0 to RC181 and 182 bytes of right channel audio data R0 to R181 shown in FIG.
182 bytes of surround right channel audio data SR0 to SR181 shown in FIG. 6F, 114 bytes of left mix channel audio data LM0 to LM113 shown in FIG. )
The 126-byte center channel audio data C′0 to C′125 shown in FIG. 8 and the 8-byte user data U0 to U7 shown in FIG.

The level control data is
The left-channel audio data level, the left-center channel audio data level, and the surround left-channel audio data level when the left-mix channel audio data is formed are each represented by 1 byte.

Each audio data of one compression processing block of the right channel system is, as shown in FIG. 11, one symbol at a time along the moving direction of the film, and the audio data of this one symbol is orthogonal to the moving direction of the film. It is recorded so as to be juxtaposed in the direction.

In FIG. 11, first, a header H0 for 1 byte is recorded in the first data string R00, followed by 3 bytes of level control data Le.
0 to Le2, and subsequently thereto, 39 symbols of audio data SW0 to SW38 of the audio data of the subwoofer channel of 62 symbols are recorded.

In the second data string R01, the above 6
Of the 2-symbol subwoofer channel audio data, the remaining 23 symbols of audio data S
W39 to SW61 are recorded, followed by 20 symbols of audio data RC0 to RC1 of the right center channel audio data of 182 symbols.
9 is recorded.

Also, the third and fourth data strings R02, R
Reference numeral 04 denotes audio data RC20 to RC62, RC63 to RC1 for 43 symbols of the subwoofer channel audio data for 182 symbols.
05, RC106 to RC148 are recorded.

In the sixth data string R05, the above 1
Of the 82-symbol subwoofer channel audio data, the remaining 33-symbol audio data RC149 to RC181 are recorded, followed by 18
Audio data R0 to R9 for 10 symbols of the audio data of the right channel for 2 symbols is recorded.

Also, the seventh to ninth data strings R06 to R0
8 includes audio data R10 to R52, R53 to R95, R for the remaining 43 symbols of the audio data of the right center channel for 182 symbols.
96 to R138 and R139 to R181 are recorded.

The tenth to fourteenth data strings R9 to R
13 includes audio data SR0 to SR42, SR43 to SR85, S for 43 symbols of the surround right channel audio data for 182 symbols.
R86 to SR128 and SR129 to SR171 are recorded.

In the fifteenth data string R14, audio data SR172 to SR181 for the remaining 10 symbols of the audio data of the surround right channel for 182 symbols is recorded, followed by 1.
Audio data LM0 to LM32 for 33 symbols of the audio data of the left mix channel of 14 symbol blocks are recorded.

In the 16th data string R15, the audio data LM of 43 symbols of the audio data of the left mix channel of 114 symbols is written.
33 to LM75 are recorded.

Further, in the seventeenth data string R16, audio data LM76 to LM113 for the remaining 38 symbols of the audio data of the left mix channel for the above 114 symbols are recorded, followed by 126.
Audio data C'0 to C'4 for 5 symbols of the audio data of the center channel for symbols
Is recorded.

The eighteenth and nineteenth data strings R1
7 and R18, audio data C'5 to C'47 and C'48 to C'90 of 43 symbols of the 126-channel center channel audio data.
Is recorded.

Further, in the twentieth data string R19, the remaining 34 symbols of audio data C'91 to C'125 of the 126-channel center channel audio data are recorded, followed by 8 bits. User data U0 to U7 of symbols are recorded.

That is, also in FIGS. 9 and 11 described above,
The 1-compression processing block includes the data strings R00 to R
It is formed by recording audio data of 43 symbols in 19 respectively.

Next, in each compression processing block in which each audio data is recorded in this way, the head of FIG.
The top data as shown in 2 is recorded.

In FIG. 12, the top data is
The preamble 55 is recorded with 58 dots in the direction orthogonal to the film traveling direction, 3 dots in the film traveling direction, and 58 dots in the direction orthogonal to the film traveling direction. Tilt detection pattern 56 recorded over 3 dots along the direction
And a block identification number (block ID) 57 recorded for 58 dots along a direction orthogonal to the film advancing direction and for 2 dots along the film advancing direction.

In the block ID 57, a film block identification number 58a is recorded for 24 dots in the direction orthogonal to the film advancing direction, a dot is recorded for 1 dot in the film advancing direction, and the film block identification number 58a. The film block identification number 58a is recorded over 32 dots in the direction orthogonal to the film advancing direction and 1 dot in the film advancing direction following 58a.
Parity 58b, a reserve 60 for recording 2 dots along the direction orthogonal to the film advancing direction following the parity 58b, and 24 dots along the direction orthogonal to the film advancing direction, the film advancing direction. Along the 1
Film block identification number 5 in which the same data as the film block identification number 58a is recorded across the dots
9a, followed by the film block identification number 59a, 32 dots in the direction orthogonal to the film advancing direction,
Parity 59b of film block identification number 59a recorded for one dot along the film traveling direction
And a reserve 60 for recording 2 dots in the direction orthogonal to the film advancing direction following the parity 59b.
And are recorded.

The film block identification numbers 58a, 5
8b, 59a, and 59b include a 1-bit track indicator, a 5-bit roll number, as shown in FIG.
A 14-bit ECC block address and a 4-bit film block address are recorded.

The track indicator shows "0" when the film block identification number is right channel audio data, and "1" when the film block identification number is left channel audio data. Is recorded. Further, the roll number has the number of the one motion picture film recorded therein,
The CC block address contains the C of the compression processing block.
The address where 1 parity and C2 parity are recorded is recorded. The address of the film block is recorded in the film block address.

Next, in such a compression processing block,
As shown in FIG. 14, 15 symbols of C1 parity is added following each of the 43 symbols of audio data. In addition, the first to eighth compression processing blocks # 0 in total
~ # 7 (20 symbols x 8 symbols = 160 symbols)
As the ECC top half block and 32 symbols of C2 parity are added, and the ninth to 16th compression processing blocks # 8 to #F (20 symbols × 8 symbols = 160 symbols) are set as the ECC bottom half block and 32 The C2 parity of the symbol is added. The C1 parity for 15 symbols is also added to the C2 parity added to each half block.

Next, the audio data T00 of the ECC top half block for the above 192 symbols (including the C2 parity of the above 32 symbols) shown in FIG. 15A.
0 to T191 and the audio data B000 to B1 of the ECC bottom half block for the above 192 symbols
Audio data is extracted from 91 symbol by symbol,
These are interleaved by alternately arranging them as shown in FIG. 7B to form 16 film blocks of 24 symbols each.

That is, as shown in FIG. 15B, the 0th film block # 0 is the 0th symbol T000 from the ECC top half block and the EC
0th symbol B0 from C bottom half block
00, the first symbol T001 from the ECC top half block, the first symbol B001 from the ECC bottom half block B ...
Eleventh symbol T0 from the top half block
11. The eleventh symbol B011 from the ECC bottom half block is arranged in order.

The first film block # 1 includes the twelfth symbol T012 from the ECC top half block, the twelfth symbol B012 from the ECC bottom half block, and the twelfth symbol B012 from the ECC top half block. Thirteenth symbol T013, thirteenth symbol B013 from the ECC bottom half block ... 23rd symbol T023 from the ECC top half block, 23rd symbol B023 from the ECC bottom half block Are formed in order.

Hereinafter, the second to fifteenth film blocks #
2 to # 15 are similarly formed.

When the film block is formed by such interleave processing, the digital sound track 5R for the right channel is formed for each channel.
And specifically, each of the above digital sound tracks 5
Audio data is recorded in R and 5L for each film block as shown in FIG.

In FIG. 16, as the film block, the head data 50 and light-shielding areas 51a and 51b formed on both sides of each of the digital sound tracks in the form of black bands along the film advancing direction,
The audio data 5 recorded so as to be orthogonal to the film advancing direction and arranged in parallel along the film advancing direction.
2, C1 parity and C2 parity, and tracking patterns 53a and 53b recorded in a band shape along the moving direction of the film adjacent to the one light-shielding area 51a are recorded.

The tracking patterns 53a and 53b
Is a black-and-white repeating pattern for each dot along the film advancing direction, and the tracking pattern 53a and the tracking pattern 53b are recorded so as to be offset by one dot along the film advancing direction.

As the head data 50, as shown in FIG. 17, the preamble 55 is recorded as a black-and-white repeating pattern of, for example, 3 dots in the film advancing direction and 3 dots in the direction orthogonal to the film advancing direction. 2 dot black-and-white repetitive pattern 56a recorded in a direction orthogonal to the advancing direction, and a 2-dot black-and-white repetitive pattern 56a recorded so as to be offset by 2 dots in the direction orthogonal to the advancing direction of the film. The inclination detection pattern 56 formed with the repeated pattern 56b is recorded, and the block ID 57 is recorded.

Here, as shown in FIG. 18, the audio data for each film block formed by the above-described interrib processing is used for each digital sound track 5R, 5R.
It may be recorded in L.

That is, in FIG. 18, as the film block, the head data 50 and the light-shielding area 51 formed in the shape of a black belt on the film edge side of each digital sound track along the film advancing direction are provided. , The audio data 52, C1 parity, and C2 parity recorded so as to be arranged in parallel along the film advancing direction orthogonal to the film advancing direction, and adjacent to the light shielding area 51 along the film advancing direction. The tracking patterns 53a and 53b recorded in a strip shape are recorded.

The tracking pattern 53 is a black and white repetitive pattern for each dot along the film traveling direction.
The tracking pattern 53b is recorded so as to be offset by one dot along the moving direction of the film.

As the leading data 50, as shown in FIG. 19, the preamble 55 is recorded as a black-and-white repeating pattern of, for example, 3 dots in the film advancing direction and 3 dots in the direction orthogonal to the film advancing direction. 2 dot black-and-white repetitive pattern 56a recorded in a direction orthogonal to the advancing direction, and a 2-dot black-and-white repetitive pattern 56a recorded so as to be offset by 2 dots in the direction orthogonal to the advancing direction of the film. The inclination detection pattern 56 formed with the repeated pattern 56b is recorded, and the block ID 57 is recorded.

Further, in the motion picture film according to the present embodiment, such a film block is symmetrically recorded by the digital sound track 5R for the right channel and the digital sound track 5L for the left channel. That is, as shown in FIG. 20, the tracking pattern 53 is included in the digital sound track 5L for the left channel.
a and 53b are recorded so as to be on the left edge 1L side of the movie film 1, and the tracking patterns 53a and 53b are recorded on the digital sound track 5R for the right channel.
Is recorded on the right edge 1R side of the movie film 1. Then, as will be described later, at the time of reproduction, the digital sound track 5L for the left channel is read from the left edge 1L side of the movie film 1, and the digital sound track 5R for the right channel is the right edge 1R of the movie film 1. It is designed to be read from the side.

Next, the motion picture film reproducing apparatus for reproducing the audio data from the motion picture film 1 is as follows.
As shown in FIG. 21, the first and second CCD line sensors 20L and 20R provided with a reading unit for one line in a direction orthogonal to the moving direction of the motion picture film 1 and the first CCD line sensor 20L. Demodulator 21 for demodulating the left channel audio data read by
L, and a demodulator 21R for demodulating the right channel audio data read by the second CCD line sensor 20R.

Further, the movie film reproducing apparatus converts the left channel audio data from the demodulator 21L into an error correction circuit 22L for performing error correction processing and the right channel audio data from the demodulator 21R. An error correction circuit 22R that performs error correction processing, a delay memory 23 that outputs the left channel audio data from the error correction circuit 22L with a delay of 17.8 frames, and the error correction circuit 22 described above.
L and 22R have an error detector 24 that detects an error flag that is output when error correction cannot be performed.

Further, in the movie film reproducing apparatus, the demultiplexer 25L for outputting in parallel the left-channel audio data serially supplied from the delay memory 23 and the error correction circuit 25R are serially supplied. A demultiplexer 25R that outputs right channel audio data in parallel, and decoders 26a to 26l that perform decoding processing on the left channel audio data and the right channel audio data from the demultiplexers 25L and 25R. have.

Further, in the motion picture film reproducing apparatus, the data selectors 27a to 27d for selecting and outputting the left channel audio data based on the detection output from the error detecting circuit 24 and the right channel audio data are selected. A data selector 28a for selecting and outputting audio data based on the detection output from the error detection circuit 24.
.About.28d.

Next, the operation of such a movie film reproducing apparatus will be described.

First, when reproduction is started, the first C
CD line sensor 20L and CCD line sensor 20R
Reads the audio data recorded on each of the digital sound tracks 5L and 5R. First C above
As shown in FIG. 20, the CD line sensor 20L moves from the left edge 1L side of the motion picture film 1 toward the image area 2,
Left-channel audio data is read line by line in a direction orthogonal to the moving direction of the motion picture film 1,
This is supplied to the demodulator 21L. Also, the second CC
As shown in FIG. 20, the D-line sensor 20R extends one line of right channel audio data from the right edge 1R side of the motion picture film 1 toward the image area 2 in a direction orthogonal to the moving direction of the motion picture film 1. It is read every time and is supplied to the demodulator 21R.

When the tracking pattern is recorded on both sides of each data track, the tracking error correction capability is improved, but the data recording area of audio data is reduced by the provision of the tracking pattern on both sides of each data track. However, in the motion picture film 1 according to the present embodiment, since the tracking patterns 53a and 53b are recorded only on one side of the digital sound tracks 5L and 5R, the recording area of the audio data can be widened and the recording can be performed. The amount of audio data to be played can be increased.

In addition, each of the above digital soundtracks 5
Data such as a tracking pattern is recorded symmetrically on L and 5R, and each CCD line sensor 20L and 20L,
20R is designed to read data from the edge side 1L and 1R of the film, respectively. Therefore, the data such as the tracking pattern can be read without being disturbed by the perforations 3L, 3R, etc., and accurate data reproduction can be performed.

The demodulators 21L and 21R perform demodulation processing on the left-channel audio data and the right-channel audio data, and the error-correcting circuit 2
1L, supplied to the error correction circuit 22R.

The error correction circuit 22L performs error correction processing on the left channel audio data from the demodulator 21L using the C1 parity and C2 parity, and supplies the error correction processing to the delay memory 23.
If the above correction cannot be made, an error flag is formed,
This is supplied to the error detector 24.

Further, the error correction circuit 22R performs error correction processing on the right channel audio data from the demodulator 21R using the C1 parity and C2 parity, and supplies this to the demultiplexer 25R. An error flag is formed when the above correction cannot be performed, and this is supplied to the error detector 24.

Here, the scratches on the motion picture film 1 are vertical scratches along the running direction of the motion picture film 1 when the motion picture film 1 is run, and scratches in a direction orthogonal to the running direction of the motion picture film. Although there are lateral scratches and the like, the use of the motion picture film 1 causes more vertical scratches than horizontal scratches.

Therefore, when the audio data is recorded on the digital sound track of the movie film in the direction orthogonal to the running direction of the film, the vertical scratches destroy the audio data for a plurality of lines.

However, on the motion picture film 1, as described above, each audio data is recorded for each byte along the running direction of the motion picture film 1, and the audio data for each 1 byte is recorded in the running direction of the film. Since they are recorded so as to be arranged side by side in a direction orthogonal to the above, even if the above-mentioned vertical scratches occur, the audio data can be destroyed to a minimum of about 1 byte. Therefore, it is possible to deal with vertical scratches that increase with the number of times the film is used.

Further, with the C1 parity, it is possible to perform error correction in the direction orthogonal to the film traveling direction and error correction due to vertical scratches on the film. Further, by the C2 parity, error correction due to lateral scratches on the film can be performed, and error correction of difficult-to-read data due to defocus can be performed.

Therefore, the motion picture film 1 and the motion picture film reproducing apparatus according to this embodiment can accurately reproduce the audio data.

In the audio data recorded on the motion picture film 1, one dot has a vertical length x as shown in FIG.
The width is recorded in a size of 22.4 μm × 24.0 μm.

The relationship between the dot size and the parity is
As shown in FIG. 23, the error rate increases as the dot size increases, and more parity needs to be added as the dot size decreases. On the other hand, the error correction capability draws a quadratic curve with the lateral size of one dot being 24.0 μm. In the motion picture film according to the present embodiment, the above audio data has 1 dot length × width 2
Since the recording is performed in the size of 2.4 μm × 24.0 μm, the maximum dot size of the error correction capability can be obtained, which can contribute to the accurate reproduction of the audio data.

As described above, the left-channel audio data and the right-channel audio data recorded on the movie film 1 are recorded with a shift of 17.8 frames. For this reason, the delay memory 23 stores 1 in the left channel audio data.
By delaying by 7.8 frames, the timing with the audio data of the right channel system is matched, and this is supplied to the demultiplexer 25L.

The demultiplexer 25L extracts the center channel (C) from the left channel audio data serially supplied from the delay memory 23.
Audio data Cn, left channel (L) audio data Ln, center left channel (LC) audio data LCn, left surround channel (SL)
Audio data SLn, subwoofer channel (SW) audio data SWn, and right mix channel (RM) audio data RMn are formed and supplied to the decoders 26a to 26f, respectively.

The demultiplexer 25R receives from the right channel audio data serially supplied from the error correction circuit 25R, the center channel (C) audio data Cn, the right channel (R) audio data Rn, and the center right. Channel (RC)
Audio data RCn, right surround channel (SR) audio data SRn, subwoofer channel (SW) audio data SWn, left mix channel (LM) audio data LMn, which are supplied to decoders 26g to 26l, respectively. To do.

Each of the decoders 26a to 26d has respective left channel audio data Cn, Ln,
The LCn and SLn are highly efficiently decoded and supplied to the left channel data selectors 27a to 27d. The decoder 26e also performs high-efficiency decoding of the left channel audio data SWn and supplies it to the right channel data selector 28d. Further, the decoder 26f performs high-efficiency decoding of the left channel audio data RMn and supplies it to the right channel data selectors 28a to 28c.

Further, the decoder 26g performs high-efficiency decoding of the right channel audio data Cn and supplies it to the data selector 27a. Further, each of the decoders 26h to 26k has the right channel audio data Rn, RCn, SRn, SWn, respectively.
Are decoded efficiently and are supplied to the right channel data selectors 28a to 28d. Also, the decoder 2
6l is the right channel audio data RMn
Is efficiently decoded, and the data is decoded by the data selectors 27b to 27b.
Supply to 27d.

Each of the data selectors 27a to 27d, 2
Detection outputs from the error detection circuit 24 are supplied to 8a to 28d. Therefore, each of the data selectors 27a to 27d and 28a to 28d can detect the data that cannot be error-corrected by the detection output. Each of the data selectors 27a to 27d, 28
Two pieces of each audio data are supplied to a to 28d, and the data other than the data for which the error correction cannot be performed is selected and output.

That is, the data selector 27a is
Of the audio data Cn of the center channel (C) of the right channel system and the left channel system, the one that has been error-corrected is selected and output. In addition, the data selector 27b selects and outputs one of the left-channel audio data (L) and the left-mix channel (LM) audio data LMn that has been error-corrected. In addition, the data selector 27c includes the left center channel (LC) audio data LCn and the left mix channel (LM) audio data LM.
Of n, the one that has been error-corrected is selected and output.
The data selector 27d selects and outputs one of the audio data SLn of the left surround channel (SL) and the audio data LMn of the left mix channel (LM) that has been error-corrected.

The data selector 28a selects and outputs one of the audio data Rn of the right channel (R) and the audio data RMn of the right mix channel (RM) that has been error-corrected. In addition, the data selector 28b includes the audio data RCn of the right center channel (RC) and the right mix channel (R).
Of the M) audio data RMn, the one that has been error-corrected is selected and output. The data selector 28c selects and outputs one of the audio data SWn of the right subwoofer channel (SW) and the audio data RMn of the right mix channel (RM) that has been error-corrected. In addition, the data selector 28d
Selects and outputs one of the audio data SWn of each subwoofer channel (SW) that has been subjected to error correction.

Incidentally, each of the data selectors 27a to 27 described above.
d and 28a to 28d select and output any one of the desired data when both the supplied data are valid, and when both the respective data are both invalid. It is controlled not to output.

As described above, the motion picture film 1 has left channel audio data SLn, Ln, LCn.
In the digital sound track 5L for the left channel in which is recorded, audio data RMn of the right mix channel (RM) in which the right channel (R), the center right channel (RC), and the surround right channel (SR) are mixed is recorded. The left channel (L), the center left channel (LC), and the surround left channel (L) are recorded in the digital sound track 5R for the right channel in which the right channel audio data SRn, Rn, RCn are recorded. Audio data LMn of the left mix channel (LMn) in which SL) is mixed is recorded. Further, the audio data of each channel recorded in the digital sound track 5R is recorded with a time difference from the audio data of each channel recorded in the digital sound track 5L.

Therefore, for example, even if a very long burst error occurs in one digital sound track 5L and an error exists in the other digital sound track 5R, each audio data Ln, LCn, SL of the left channel is generated.
Since the audio data LMn in which n is mixed can be reproduced, the signal of the left system can be generated from this.

Further, as shown in FIG. 24, for example, scratches are made in the horizontal direction due to hand cutting and the like, and Cn + α, Ln + α, LCn + α, SLn + α, SWn in the left system.
+ Α, RMn + α data cannot be reproduced, and Cn, Rn, RCn, SRn, SWn, LMn data cannot be reproduced in the right system, the time series n data in the left system has already been reproduced in the left system. Time series n
The sound field in can be reproduced. Further, the time series (n + α) data can be reproduced in the time series (n + α) sound field by the data recorded in the right series.

Further, the audio data Cn of the center channel (C) and the subwoofer channel (SW),
SWn is recorded in each digital sound track 5L and digital sound track 5R. In this way, by including the audio data of the channel which seems to be particularly important in a double manner, when the composite operation of the other composite device is possible when the composite operation of the other composite device is impossible,
Since reproduction becomes possible, it is possible to more effectively compensate for sound breaks.

Then, the data reproduced by this reproducing device
For example, as shown in FIG. 25, the audio data of the channel includes the center speaker 102 and the subwoofer 1 arranged on the screen side on which the image reproduced from the image recording area 2 of the movie film 1 is projected by the projector 100.
03, center left speaker 104, center right speaker 105, left speaker 106, and right speaker 107 for 6 channels of audio data, and surround right speaker 108 and surround right speaker 109 for 2 channels of audio data arranged on the projector 100 side. It is data, and a sound field rich in realism can be reproduced by the 8-channel digital sound system using the speakers 102 to 109.

Here, the center speaker 102 is
It is arranged in the center of the screen 101 side and outputs a reproduced sound based on the audio data C of the center channel, and outputs the most important reproduced sound such as the dialogue of the actor.

Further, the subwoofer 103 is provided with audio data SW of the subwoofer channel (SW).
It outputs a reproduced sound by n, and effectively outputs a sound that is felt as vibration rather than a low-frequency sound such as an explosion sound. Often used effectively in blast scenes.

Further, the left speaker 106 and the right speaker 107 are arranged on the left and right of the clean 101, and reproduce the reproduced sound by the audio data Ln of the left channel (L) and the reproduced sound by the audio data Rn of the right channel (R). Outputs a stereo sound effect.

The center left speaker 104 and the center right speaker 105 are arranged between the center speaker 102 and the left speaker 106 and the right speaker 107, and the reproduced sound and the center sound of the center left channel (LC) audio data LCn. Right channel (RC)
Of the left speaker 106 and the right speaker 10 respectively.
It plays the auxiliary role of 7. Especially in a movie theater or the like where the screen 101 is large and the number of seats is large, the localization of the sound image tends to be unstable depending on the position of the seats. It is effective in creating localization.

Further, the surround left speaker 108 is used.
The surround right speaker 109 is arranged so as to surround the spectator seats, and outputs a reproduced sound by the audio data SLn of the surround left channel (SL) and a reproduced sound by the audio data SRn of the surround right channel (SR). It has the effect of giving an impression of sound, applause, and cheers. As a result, a more stereoscopic sound image can be created.

Further, as shown in FIG. 26, for example, when only the audio data of the left digital sound track is reproduced, the center right channel (RC) is output from the center right speaker 105, the right speaker 107 and the surround right speaker 109. Since the reproduced sound based on the mixed audio data RMn of the right channel (R) and the surround right channel (SR) is output, no sound break occurs even if all of the right system sound cannot be reproduced. , You can get the same voice effect as normal.

Further, as shown in FIG. 27, for example, when only the audio data of the right digital soundtrack is reproduced, the center left channel (LC) is output from the center left speaker 104, the left speaker 106 and the surround left speaker 108. Since the reproduced sound based on the mixed audio data LMn of the left channel (L) and the surround left channel (SL) is output, even if all the left system sounds cannot be reproduced, no sound break occurs. , You can get the same voice effect as normal.

Next, when the CCD line sensor 20L (or 20R) reads the audio data on-track as shown by the solid line A in FIG. 28A, the tracking patterns 53a and 53b respectively show the audio data. The CCD line sensor 20L is recorded at a position shifted by 90 ° in the film advancing direction.
Reproduces only the upper half or the lower half of each tracking pattern 53a, 53b, the reproduced signals of the tracking patterns 53a, 53b have the levels of the upper half and the lower half as shown by the solid line A in FIG. It will be kept.

On the other hand, the dotted line B in FIG.
When the audio data is read by the detrack as shown by, the tracking patterns 53a and 53b are reproduced almost entirely. Therefore, the reproduction signals of the tracking patterns 53a and 53b are as shown in FIG. As shown by the dotted line B, the tracking patterns 53a, 53b
In addition to swinging up and down in accordance with the black and white dots, the level becomes about twice as high as on-track.

Therefore, in the motion picture film reproducing apparatus, each CCD line sensor 29L, 29L,
The reading timing of 20R is corrected to correct the tracking error.

That is, the tracking error correction system of the movie film reproducing apparatus has a structure as shown in FIG. Note that FIG. 29 shows a tracking error correction system for the left channel system, and the tracking error correction system for the right channel system has the same configuration. Therefore, the operation of the left channel tracking error correction system will be mainly described, and the detailed description of the right channel tracking error correction system will be omitted.

In FIG. 29, the tracking pattern 5 read by the CCD line sensor 20L is used.
3a, 53b, audio data, etc.
Through 0, the waveform shaping circuit 201, the sample hold circuits 203, 204, 206, 207, and the synchronization detection circuit 20.
5, supplied to the start bit detection circuit 208.

The waveform shaping circuit 201 forms a shaped rectangular wave by shaping the waveform of each data, and supplies the shaped rectangular wave to the demodulator 21L via the output terminal 202. As a result, demodulation processing is performed by the demodulator 21L, and thereafter, the above-described reproduction operation is performed.

On the other hand, the start bit detection circuit 208
Detects the start bit 58 recorded between the light shielding area 51a and the tracking pattern 53a as shown in FIG. 17, and outputs the detection output from the first to fourth delay circuits 209, 210, 213, 214. Supply to.

The first delay circuit 209 delays the start bit detection output so as to sample and hold the tracking pattern 53a of the data reproduced by the CCD line sensor 20L as shown in FIG. And supplies this to the sample hold circuit 206 as a first timing pulse.

Further, the second delay circuit 209 has the same structure as that shown in FIG.
As shown in 0, of the data reproduced by the CCD line sensor 20L, the start bit detection output is delayed so that the tracking pattern 53b can be sampled and held, and this is sampled and held as a second timing pulse. It is supplied to the circuit 207.

Further, the third delay circuit 213 has the same structure as in FIG.
As shown in 0, in the data reproduced by the CCD line sensor 20L, the detection output of the start bit is delayed so that a dot separated by 2 dots from the last dot of the tilt detection pattern 56 can be sample-held. And supplies this to the switch 211 as a third timing pulse.

In addition, the fourth delay circuit 214 is similar to that shown in FIG.
As shown in 0, in the data reproduced by the CCD line sensor 20L, the start bit detection output is delayed so that the last dot of the tilt detection pattern 56 can be sampled and held. Is supplied to the switch 212 as a timing pulse.

The synchronization detection circuit 205 is used to detect the data reproduced by the CCD line sensor 20L as shown in FIG.
The sync data (preamble) 55 shown in FIG. 2 is detected, high level data is formed only during the reproduction period of the inclination detection pattern 56, and the high level data is formed.
Supply to 12.

Each of the switches 211 and 212 is controlled to be turned on when high level data is supplied from the synchronization detection circuit 205, and the third and fourth delay circuits 213 and 213 are provided. The third and fourth timing pulses from 214 are supplied to the sample hold circuits 203 and 204, respectively.

The sample and hold circuit 206 samples and holds the tracking pattern 53a according to the first timing pulse from the first delay circuit 206, and supplies this to the subtractor 216.

Further, the sample hold circuit 207 is also provided.
Receives and samples the tracking pattern 53b by the second timing pulse from the second delay circuit 210 and supplies it to the subtractor 216.

Further, the sample hold circuit 203
Uses the third timing pulse from the third delay circuit 213 to sample and hold the data of the dot separated by 2 dots from the last dot of the inclination detection pattern 56, and supplies this to the subtractor 215.

Further, the sample hold circuit 204
Uses the fourth timing pulse from the fourth delay circuit 214 to sample and hold the data of the last dot of the slope detection pattern 56, and subtracts it from the subtractor 215.
Supply to.

The subtractor 216 receives the sample hold data of the tracking pattern 53a from the sample hold circuit 206 and the sample hold circuit 20.
The difference from the sample hold data of the tracking pattern 53b from 7 is detected, and the detection output is supplied to the polarity inversion circuit 218.

Further, the subtractor 215 outputs the sample and hold data of the dot separated by 2 dots from the last dot of the inclination detection pattern 56 from the sample and hold circuit 203 and the final sample and hold data from the sample and hold circuit 204. The difference between the dot and sample hold data is detected, and the detection output is supplied to the polarity reversing circuit 217.

Polarity inversion data is supplied to the polarity inversion circuits 217 and 218 via input terminals 219 and 220, respectively. The polarity inversion circuits 217 and 218
According to the polarity inversion data, for example, inverts the detection output of the difference for each line and supplies these to the adder 221.

The adder 221 adds the detection outputs of the polar-inverted difference to form addition data. This addition data is the tracking patterns 53a, 5 described above.
3b and the inclination detection pattern 56,
This indicates an error in the reading timing of the CCD line sensor 20L. This addition data is supplied to the comparator 223 via the low-pass filter 222.

The output of the comparator 223 is supplied to the ramp generator 225 via the delay circuit 224, and the ramp generator 225 supplies the comparator 223 with the sawtooth wave of the level shown by the alternate long and short dash line in FIG. Accordingly, the lamp generator 225
Output is variably controlled according to the output from the low-pass filter 222, that is, the reading timing error of the CCD line sensor 20L. Therefore, from the comparator 223, as shown by the solid line and the dotted line in FIG.
A sawtooth wave corresponding to the error in the reading timing of 0L is output. The sawtooth wave is supplied to the delay circuit 224 and the CCD drive circuit 226.

The CCD drive circuit 226 controls the read timing of the CCD line sensor 20L according to a sawtooth wave indicating the read timing error.

Thus, the CCD line sensor 20
Each data can be read while performing tracking correction so that the read timing of L is always in the just track state.

In the motion picture film 1 according to the present embodiment, the recording of the tracking patterns 53a and 53b is recorded only on one side of the digital sound tracks 5L and 5R to expand the data area. Recording the tracking pattern on only one side reduces the tracking error correction capability. However, instead of recording the tracking patterns 53a and 53b on only one side as described above, the tilt detection pattern 56 is recorded on each film block and the tracking patterns 53a and 5b are recorded.
Since the tracking error is corrected based on the detection outputs of 3b and the inclination detection pattern 56, the recording area of the audio data can be expanded without lowering the tracking error correction capability.

In the description of the above-mentioned embodiment, the dot size of each of the above data is 24.0 μm in the horizontal direction, but this is, for example, 23.9 μm, 24.1 μm.
As a matter of course, it is possible to change appropriately as long as it is about 24 μm.

Here, the specific structure of the demodulator will be described.

The structure of the demodulator 21R is the same as that of the demodulator 21R.
Since it is similar to L, only the demodulator 21L will be described below.

The demodulator 21L of the motion picture film reproducing apparatus shown in FIG. 21 is, for example, as shown in FIG. 32, a waveform equivalent for shaping the reproduced waveform of the left channel audio data from the first CCD line sensor 20L. Bowl 250
A gain adjusting unit (hereinafter referred to as AGC) 251 that adjusts the signal level of the reproduction signal of the audio data whose waveform is shaped by the waveform equalizer 250, and the reproduction signal whose signal level is adjusted by the AGC 251 into binary data. And a determination unit 252 for conversion.

The reproduced waveform of the audio data read by the first CCD line sensor 20L has distortions that occur during the reproduction of the film and on the transmission path, and the waveform equalizer 250 uses these distortions by waveform equalization. The reduced reproduction signal is supplied to the AGC 251. A
The GC 251 adjusts the signal level of the reproduction signal whose waveform is shaped by the waveform equalizer 250 to a constant amplitude, and supplies the reproduction signal with the adjusted signal level to the determination unit 252. The judgment unit 252 compares the reproduction signal whose signal level has been adjusted by the AGC 251 with a preset threshold value, converts it into binary data, and supplies it to the error correction circuit 21L.

Specifically, as the left-channel audio data, for example, as shown in FIG.
"01011100 ..." When the film on which the bit string is recorded is reproduced, the determination unit 25 is operated from the CCD line sensor 20L via the waveform equalizer 250 and the AGC 251.
The reproduced waveform of the audio data supplied to 2 is a waveform in which the high frequency components of the rectangular wave are attenuated and the edges are blunted, as shown in FIG. 33B, for example.

The determination unit 252 is the CCD line sensor 20.
The threshold between the maximum value and the minimum value of the output of L is used as a threshold value, and the reproduced signal from the AGC 251 is compared,
It is determined whether each bit of the audio data is 0 or 1, and, for example, as shown in FIG. 33 (c), "001011100.
.. "” is output.

By the way, the recording level of the data pattern recorded on the film varies depending on the baking degree of the film, the asymmetry of the recording of the data pattern, and the like.

Specifically, when a film having a high degree of film burn-in is reproduced, the reproduced waveform of the audio data supplied to the determination unit 252 has a lowered overall level as shown in FIG. 34 (b), for example. It becomes a state. For such a reproduced waveform, as described above, the CCD line sensor 20
When the intermediate value between the maximum value and the minimum value of the L output is used as a threshold value and converted into binary data, for example, as shown in FIG. 34 (c), the recorded data has a level of “1” and the determination unit. The level at which 252 is determined to be “1” is shifted, and the actually recorded data shown in FIG.
The errors Δ1, Δ2, and Δ3 occur between the period of 1 ”and the period of the reproduced data shown in FIG. 34 (c) being“ 1 ”, and the phase margin of the reproduced audio data decreases.
This may increase the error rate of reproduced audio data.

Further, when a film having asymmetric recording of the data pattern is reproduced, the reproduction waveform of the audio data supplied to the determination unit 252 is, for example, as shown in FIG.
As shown in (b), when the data is "1", the audio data level is above the threshold, and when the data is "0", the audio data level is below the threshold. The state has asymmetry in and. For such a reproduced waveform, when the intermediate value between the maximum value and the minimum value of the output of the CCD line sensor 20 is used as a threshold value to be converted into binary data as described above, it is actually recorded as shown in FIG. 35 (c) and the period in which the collected data is "1".
There is an error Δ in the period when the reproduced data shown in is “1”.
4, .DELTA.5, cause [Delta] 6, the phase margin of the reproduced audio data is reduced, which may increase the error rate of the audio data to be reproduced.

Therefore, in the motion picture film reproducing apparatus according to the present invention, the demodulator 21L is used to extract the reproduction levels of the tracking patterns 53a and 53b instead of the AGC 251, as shown in FIG. The gain adjusting unit 255 that adjusts the level of audio data based on the outputs of the unit 254 and the level extracting unit 254.
And an AGC 253 having

The level extraction unit 254 of the AGC 253 extracts the difference between the reproduction level of the tracking patterns 53a and 53b and the reproduction level when the recorded data is "0" or "1", and this difference is made constant. The gain of the gain adjusting unit 255 is controlled so that That is, the level extraction unit 254 uses the tracking patterns 53a, 5a.
The average of the reproduction levels of 3b is obtained, and the gain adjusting unit 2 is provided so that the difference between the average of the reproduction levels and the reproduction level when the recorded data is "0" or "1" becomes constant.
Control the gain of 55.

When the films having different recording levels are reproduced as described above, the signal levels of the reproduced signals fluctuate, but the reproducing levels of the tracking patterns 53a and 53b also fluctuate. In the demodulator 21L, as described above, the gain adjusting unit is arranged so that the difference between the average of the reproduction levels of the tracking patterns 53a and 53b and the level when the recorded data is "0" or "1" becomes constant. Since the gain of 255 is controlled, the signal level of the reproduction signal is compensated according to the actual recording level. If the determination unit 252 converts the reproduced signal whose signal level is compensated into binary data, the determination according to the actual recording level can be performed and the error rate can be reduced.

Even if the CCD line sensor 20L is displaced from the on-track as shown by the dotted line in FIG. 37 (a), if the CCD line sensor 20L is in the track, the inside of the track is The data pattern can be reproduced. At this time, if the CCD line sensor 20L is in the track, the average of the reproduction levels of the tracking patterns 53a and 53b is constant. That is, the gain can be adjusted based on the average of the reproduction levels.

Therefore, in the demodulator 21L, the difference between the average of the reproduction levels of the tracking patterns 53a and 53b and the reproduction level when the recorded data is "0" or "1" becomes constant. Gain adjuster 255
The audio data is reproduced by adjusting the gain of.

Specifically, the CCD line sensor 20 described above
When the audio data is read while L is shifted upward from the on-track as shown by the dotted line in FIG. 37A, the level extraction unit 254 and the gain adjustment unit are output from the CCD line sensor 20L via the waveform equalizer 250. As shown in FIG. 37 (b), the reproduced signal of the audio data supplied to 255 is in a state in which the level LV1 of the area a corresponding to the tracking pattern 53a is lower than the level LV2 of the area b corresponding to the tracking pattern 53b. Becomes
At this time, the level extraction unit 254 obtains an average level LV3 of the level LV1 and the level LV2, and calculates the level LV3.
The gain of the gain adjusting unit 255 is adjusted so that the difference between 3 and the level corresponding to the data “0” or “1” becomes constant.

When audio data is read while the CCD line sensor 20L is shifted downward from on-track as shown by the dotted line in FIG. 38A, it is supplied to the level extraction section 254 and the gain adjustment section 255. 38B, the level LV4 of the area a corresponding to the tracking pattern 53a is higher than the level LV5 of the area b corresponding to the tracking pattern 53b. At this time, the level extraction unit 255 obtains the average level LV6 of the levels LV4 and LV5, and the gain adjustment unit so that the difference between this level LV6 and the level corresponding to the data “0” or “1” becomes constant. Adjust the gain of 255.

When the CCD line sensor 20L reads the audio data on-track as shown by the dotted line in FIG. 39 (a), the audio data supplied to the level extraction section 254 and the gain adjustment section 255 are As shown in FIG. 39B, the tracking pattern 53a
Thus, the level LV7 of the area a corresponding to the area and the level LV8 of the area b corresponding to the tracking pattern 53b are in the same state. At this time, the level extraction unit 255 determines that the level L
The average level LV9 of V7 and level LV8 is calculated, and the difference c between this level LV9 and the level corresponding to data "0"
Alternatively, the gain of the gain adjusting unit 255 is adjusted so that the difference d from the level corresponding to "1" becomes constant.

That is, as shown in FIG. 39, in the on-track state, the tracking patterns 53a, 53
The levels LV7 and LV8 of the areas a and b corresponding to b are equal, and the levels LV7 and LV8 are values based on the degree of baking of the film and the asymmetry of the data pattern.
That is, when the recording level of the data pattern is high (or low), the average level LV9 of the regions a and b corresponding to the tracking patterns 53a and 53b shown in FIG. 39 (b) is high (or low). Become.

In this demodulator 21L, the gain of the gain adjusting section 255 is adjusted so that the difference c between the level LV9 and the level corresponding to the data "0" or the difference d between the level corresponding to "1" becomes constant. Therefore, the reproduction level is compensated according to the fluctuation of the actual recording level.
As a result, the demodulator 21L reduces the error rate by compensating the reproduction level of the audio data according to the fluctuation of the actual recording level when the binary data is compared with the threshold value. Then, the audio data recorded in the digital sound track can be reproduced accurately.

Further, the demodulator 21L is, for example, as shown in FIG.
As shown in FIG. 7, instead of the determination unit 252, the level detection unit 257 that detects the level of the area corresponding to the tracking patterns 53a and 53b of the audio data, and the audio data based on the detection output of the level detection unit 257 It is also possible to employ a configuration including a determination unit 256 having a comparator 258 that converts the data into binary data.

The level detector 257 detects the reproduction level of the audio data tracking patterns 53a and 53b, determines a threshold value based on the detected reproduction level, and supplies the threshold value to the comparator 258.
Is configured to compare the audio data from the AGC 251 with the threshold value from the level detection unit 257 and convert it into binary data.

The reproduction level of the audio data differs depending on the degree of burning of the film, the asymmetry of the recording of the data pattern, etc. as described above, and is simply the CCD line sensor 20L.
When the audio data is converted into binary data by using the average of the maximum value and the minimum value of the output of the optical pickup as the threshold value, the error rate becomes large. By the way, the reproduction level of the tracking patterns 53a and 53b of the audio data differs depending on the degree of film burning, the asymmetry of the recording of the data pattern, and the like, as described above.

Therefore, in the demodulator 21L, the level detector 257 sets the average of the reproduction levels of the tracking patterns 53a and 53b of the audio data as the threshold value. That is, the tracking patterns 53a, 53
When the reproduction level of b is low, the threshold value which is the average of the reproduction levels becomes low, and the tracking patterns 53a, 5
When the reproduction level of 3b is high, the threshold value which is the average of the reproduction levels becomes high. As a result, this demodulator 21L
Then, the threshold value which is an appropriate value is determined according to the reproduction level of the data pattern.

The comparator 258 converts the audio data from the AGC 251 into binary data based on the threshold value determined by the level detecting unit 257. As a result, the binarization can be performed based on the threshold value that is set to an appropriate value according to the reproduction level of the data pattern, and the errors Δ1 to Δ6 in converting the above binary data can be reduced. Error rate can be reduced.

When the films having different recording levels are reproduced as described above, the signal levels of the reproduced signals fluctuate, but the reproducing levels of the tracking patterns 53a and 53b also fluctuate. In this demodulator 21L, since the average of the reproduction levels of the tracking patterns 53a and 53b is used as a threshold value to change to binary data as described above, the signal level of the reproduction signal is equivalently compensated according to the recording level. Has been done. That is, the demodulator 21L can make a determination according to the recording level of the actual data pattern, and can reduce the error rate.

Even if the CCD line sensor 20L is displaced from the on-track as shown by the dotted line in FIG. 37 (a), if the CCD line sensor 20L is in the track, the inside of the track The data pattern can be reproduced. At this time, if the CCD line sensor 20L is in the track, the average of the reproduction levels of the tracking patterns 53a and 53b is constant. That is, specifically, the CCD line sensor 2
When audio data is read while 0L is shifted upward from on-track as indicated by the dotted line in FIG. 37A, the reproduced signal of the audio data supplied to the level detection unit 257 and the comparator 258 is as shown in FIG. As shown in FIG. 37 (b), the level LV1 of the area a corresponding to the tracking pattern 53a is lower than the level LV2 of the area b corresponding to the tracking pattern 53b. At this time, the level detection unit 257 determines that the level LV1 and the level LV are
The average level LV3 of 2 is obtained, and this level LV3 is supplied to the comparator 258 as a threshold value.
The reproduced signal of the audio data is converted into binary data based on the threshold value supplied from the level detection unit 257.

When the CCD line sensor 20L reads audio data with the CCD line sensor 20L shifted downward from on-track as shown by the dotted line in FIG. 38A, it is supplied to the level detector 257 and the comparator 258. 38B, the level LV4 of the area a corresponding to the tracking pattern 53a is the level LV5 of the area b corresponding to the tracking pattern 53b.
It will be high against. At this time, the level detector 25
7 is an average level LV of level LV4 and level LV5
6 is obtained, and the comparator 2 using this level LV6 as a threshold value
Then, the comparator 258 converts the reproduction signal of the audio data into binary data based on the threshold value supplied from the level detection unit 257.

When the CCD line sensor 20L reads on-track audio data as shown by the dotted line in FIG. 39 (a), the audio data supplied to the level detecting section 257 and the comparator 258 are as shown in FIG. 39
As shown in (b), the level LV7 and the tracking pattern 5 of the area a corresponding to the tracking pattern 53a.
The level LV8 of the region b corresponding to 3b becomes equal. At this time, the level extraction unit 255 determines that the level LV7
And an average level LV9 of the levels LV8 are obtained, and the level LV9 is supplied to the comparator 258 as a threshold value. The comparator 258 outputs the reproduction signal of the audio data based on the threshold value supplied from the level detector 257. Is converted into binary data.

Thus, in the demodulator 21L, the reproduced signal is binarized by using the average of the levels of the tracking patterns 53a and 53b as a threshold value.

As a result, the demodulator 21L determines an appropriate threshold value in accordance with the recording level and converts the audio data into binary data based on this threshold value, so that the error rate is reduced. The audio data recorded in the digital sound track can be reproduced accurately.

In the above description, the determination of the threshold value when reproducing the audio data of the binary-recorded film in which the data pattern has two values has been described. However, for example, there are two or more data patterns. The threshold value when reproducing the audio data of the multi-value recorded film having the value can be similarly determined.

In the above description of the embodiment, data "
The case has been described in which the level of audio data reproduced when 0 "is recorded decreases and the level of audio data reproduced when data" 1 "is recorded increases, but the present invention is also applicable to the opposite case. Can be applied, and the same effect as described above can be obtained.

[0237]

Since the motion picture film and the motion picture film reproducing apparatus according to the present invention record the tracking pattern only on one side of the digital sound track, the recording area of the audio data can be widened. The amount of audio data to be recorded can be increased. Moreover, instead of recording the tracking pattern on only one side, the inclination detection pattern is recorded for each block, and the tracking error is corrected based on each detection output of the tracking pattern and the inclination detection pattern. The recording area for the audio data can be expanded without lowering the tracking error correction capability.

Further, in the motion picture film reproducing apparatus according to the present invention, the reproducing level of the tracking pattern of the digital sound track read by the level detecting means of the reproducing means is detected, and the tracking pattern of the tracking pattern detected by the level adjusting means is detected. By adjusting the level of the data pattern of the digital sound track read based on the playback level, the error level is reduced by compensating the playback level of the audio data in accordance with the fluctuation of the actual recording level. The audio data recorded in can be accurately reproduced.

Further, in the motion picture film reproducing apparatus according to the present invention, the tracking level detected by the binarizing means is detected by the reproducing level of the tracking pattern of the digital sound track read by the level detecting means of the reproducing means. By determining the threshold value based on the playback level of the pattern and binarizing the playback signal of the data pattern of the digital soundtrack based on the determined threshold value, an appropriate threshold value can be set according to the recording level. The error rate can be reduced by deciding and binarizing the audio data based on this threshold value, and the audio data recorded in the digital sound track can be accurately reproduced.

[0240]

[Brief description of drawings]

FIG. 1 is a diagram showing a recording mode of a motion picture film according to the present invention.

FIG. 2 is a diagram for explaining a state in which the audio data of the movie film is recorded while being shifted by a predetermined amount in the right channel system and the left channel system.

FIG. 3 is a block diagram of a recording system of the movie film reproducing apparatus.

FIG. 4 is a diagram showing left-channel audio data recorded in the compression processing block of the motion picture film.

FIG. 5 is a diagram showing a recording mode of left-channel audio data recorded in the compression processing block of the motion picture film.

FIG. 6 is a diagram showing right channel audio data recorded in the compression processing block of the movie film.

FIG. 7 is a diagram showing a recording mode of left-channel audio data recorded in the compression processing block of the motion picture film.

FIG. 8 is a diagram showing another example of left-channel audio data recorded in the compression processing block of the movie film.

FIG. 9 is a diagram showing another example of a recording mode of left-channel audio data recorded in the compression processing block of the motion picture film.

FIG. 10 is a diagram showing another example of right channel audio data recorded in the compression processing block of the motion picture film.

FIG. 11 is a diagram showing another example of a recording mode of left-channel audio data recorded in the compression processing block of the movie film.

FIG. 12 is a diagram showing head data recorded at the head of the compression processing block.

FIG. 13 is a diagram showing data recorded in a block ID of the head data.

FIG. 14 is a diagram showing C1 parity added to each compressed block and C2 parity added to each of a plurality of compressed blocks.

FIG. 15 is a diagram for explaining interleaving processing performed for each of a plurality of compressed blocks.

FIG. 16 is a diagram showing a state in which a film block formed by the interleave processing is recorded on a motion picture film.

FIG. 17 is a diagram showing head data recorded on the motion picture film.

FIG. 18 is a diagram showing another example in which a film block formed by the interleave processing is recorded on a motion picture film.

FIG. 19 is a diagram showing another example of head data recorded on the motion picture film.

FIG. 20 is a diagram showing film blocks symmetrically recorded on the digital sound track for the right channel and the digital sound track for the left channel of the motion picture film, respectively.

FIG. 21 is a block diagram of a reproduction system of the movie film.

FIG. 22 is 1 of each data recorded on the above-mentioned motion picture film.
It is a figure which shows a dot size.

FIG. 23 is a diagram showing a relationship between the dot size and error correction capability.

FIG. 24 is a diagram for explaining a state in which the audio data of the movie film is recorded while being shifted by a predetermined amount in the right channel system and the left channel system.

FIG. 25 is a diagram for explaining the acoustic output of each audio data recorded on the movie film.

FIG. 26 is a diagram for explaining the acoustic output of each audio data recorded on the motion picture film.

FIG. 27 is a diagram for explaining the acoustic output of each audio data recorded on the motion picture film.

FIG. 28 is a diagram for explaining a tracking error of a CCD line sensor that reproduces audio data and the like from the movie film.

FIG. 29 C to correct the tracking error
It is a block diagram of a tracking error correction system of the reproduction system of the above-mentioned motion picture film for controlling the read timing of the CD line sensor.

FIG. 30 is a diagram for explaining a timing at which the tracking error correction system samples and holds the tracking pattern and the inclination detection pattern.

FIG. 31 is a diagram for explaining drive pulses of a CCD line sensor formed by the tracking error correction system.

[Fig. 32] Fig. 32 is a block diagram illustrating a configuration of a movie film reproducing system according to the present invention.

FIG. 33 is a waveform chart showing a reproduction operation waveform of the reproduction system.

FIG. 34 is a waveform chart showing a reproduction operation waveform of the reproduction system.

FIG. 35 is a waveform chart showing a reproduction operation waveform of the reproduction system.

FIG. 36 is a block diagram showing a configuration of the reproduction system.

FIG. 37 is a waveform chart showing a reproduction operation waveform of the reproduction system.

FIG. 38 is a waveform chart showing a reproduction operation waveform of the reproduction system.

FIG. 39 is a waveform chart showing a reproduction operation waveform of the reproduction system.

FIG. 40 is a block diagram showing another configuration of the reproduction system.

[Explanation of symbols]

1 movie film Left edge of 1L movie film Right edge of 1R movie film 2 video recording area 3L, 3R perforation 4L, 4R analog soundtrack 5L, 5R digital soundtrack 11L, 11R mixer 12a to 12l encoder 13L, 13R multiplexer 14R delay memory 15L, 15R error correction data addition circuit 16L, 16R modulator 17L, 17R recorder 20L, 20R First and second CCD line sensor 21L, 21R demodulator 22L, 22R error correction circuit 23 Delay memory 24 Error detector 25L, 25R demultiplexer 26a to 26l Decoder 27a-27d Data selector 28a-28d Data selector 50 First data 51a, 51b light shielding area 52 audio data 53a, 53b tracking pattern 55 Preamble 56 Tilt detection pattern 57 Block ID 58 Start Bit 200 amplifier circuit 201 Wave shaping circuit 202 output terminal 203,204 Sample and hold circuit 205 synchronization detection circuit 206, 207 Sample and hold circuit 208 Start bit detection circuit 209, 210 First and second delay circuits 211,212 switch 213 and 214 third and fourth delay circuits 215,216 Subtractor 217 and 218 polarity inversion circuit 221 adder 222 Low-pass filter 223 Comparator 224 delay circuit 225 lamp generator 250 waveform equalizer 251,253 AGC 252, 256 judgment unit 254 Level extractor 255 gain adjuster 257 Level detector 258 comparator

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Inaru 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Hideki Ando 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Tetsuro Makise 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Inventor Yoshiyuki Suzuki 6-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Within the corporation (56) References JP-A-5-109196 (JP, A) JP-A-5-40938 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G03B 31/02 G11B 7/00

Claims (10)

(57) [Claims] 1. A motion picture film in which a digital sound track on which audio data is recorded is formed along a film running direction, wherein the digital sound track is orthogonal to the film running direction and is aligned along the film running direction. A data pattern of audio data is recorded in block units on the provided data tracks, and a tracking pattern indicating the position of each data track in track units is recorded on one side of each data track along the film running direction. A motion picture film, wherein an inclination detection pattern indicating the inclination of a data track in block units is recorded in the data tracks in block units. 2. The motion picture film according to claim 1, wherein the tracking pattern is recorded on a film edge side of a digital sound track. 3. The tracking pattern comprises a plurality of columns.
Each row is a repeating pattern of 1 dot
The dot pattern in one row is in the running direction of the film.
Along with the dot pattern of the other row along with one dot
The dots in each column above are
In the film running direction with respect to the track data pattern
3. The movie film according to claim 1, wherein the movie film is recorded at a position displaced by a predetermined amount. 4. A data pattern of audio data is recorded in block units on data tracks which are orthogonal to the film running direction and are arranged in parallel along the film running direction, and the position of each data track is track by track unit. A digital sound track is formed by recording the tracking pattern shown on one side of each data track along the film running direction and the tilt detection pattern showing the tilt of each data track in block units on the data track. A playback device for a motion picture film formed along a direction, wherein a playback means for optically reading the digital sound track and a tracking error of the playback means based on a playback signal of a tracking pattern from the playback means Tracking error detection A step, an inclination detecting means for detecting the inclination of each data track in block units based on the reproduction signal of the inclination detecting pattern from the reproducing means, a tracking error detected by the tracking error detecting means, and the inclination detecting means. Tracking error correction means for correcting the tracking error of the reproducing means on the basis of the detection output by the reproducing means. While correcting the tracking error of the reproducing means by the tracking error correcting means, the digital sound track is reproduced by the reproducing means. A movie film playback device characterized by being read by. 5. A motion picture film reproducing apparatus according to claim 4, wherein said reproducing means optically reads a digital sound track having a tracking pattern recorded on the film edge side. 6. The reproducing means is configured such that the tracking pattern is composed of a plurality of columns, and each column is repeated every dot.
And the dot pattern in one row is a fill
Dot pattern in the other row along the running direction
And the dots in each row above
For the data pattern of the above data track.
6. The motion picture film reproducing apparatus according to claim 4, wherein a digital sound track recorded at a position displaced by a predetermined amount in the running direction of the rum is optically read. 7. A motion picture film in which a digital sound track on which audio data is recorded is formed along the film running direction, wherein the digital sound track is perpendicular to the film running direction and parallel to the film running direction. A data pattern of audio data is recorded in blocks on the provided data tracks, and a tracking pattern indicating the position of each data track in track units is recorded on one side of each data track along the film running direction.
The tracking pattern is composed of multiple columns,
Each row is a repeating pattern for each dot.
The dot patterns of the rows are mutually aligned along the running direction of the film.
To be offset by 1 dot from the dot pattern on the other row
The dots in each row above are arranged in the data track
A certain amount of deviation from the data pattern in the film running direction
A motion picture film that is recorded at different positions. 8. A data pattern of audio data is recorded in block units on data tracks which are orthogonal to the film running direction and are arranged in parallel along the film running direction, and the position of each data track is track by track unit. The tracking pattern shown is recorded on one side of each data track along the film running direction.
The pattern is composed of multiple rows, and each row has one dot
It is a repeating pattern, and the dot pattern in one row is
Dot patterns in the other row along the running direction of the film
It is arranged so that it is offset by one dot from the turn, and
Dots correspond to the data pattern of the above data track
Is a movie film reproducing apparatus in which a digital sound track recorded at a position displaced by a predetermined amount in the film running direction is formed along the film running direction, and a reproducing means for optically reading the digital sound track, A tracking error detecting means for detecting a tracking error of the reproducing means based on a reproduction signal of the tracking pattern from the reproducing means, and a tracking error of the reproducing means based on the tracking error detected by the tracking error detecting means. And a tracking error correcting means for correcting the tracking error of the reproducing means by the tracking error correcting means, and the digital sound track is read by the reproducing means. 9. The reproducing means includes level detecting means for detecting a reproducing level of a tracking pattern of a read digital sound track, and digital sound track data read based on the reproducing level of the tracking pattern detected by the detecting means. 9. The motion picture film reproducing apparatus according to claim 8, further comprising level adjusting means for adjusting the level of the pattern. 10. The reproducing means detects the reproducing level of the tracking pattern of the read digital sound track, and the threshold value is determined based on the reproducing level of the tracking pattern detected by the level detecting means. 9. Binarizing means for binarizing the reproduction signal of the data pattern of the digital sound track based on the determined threshold value.
Alternatively, the motion picture film reproducing apparatus according to claim 9.