JPH07219083A - Movie film - Google Patents

Abstract

PURPOSE:To provide a movie film from which audio data can accurately be reproduced without being effected by a longitudinal or lateral flaw on the movie film. CONSTITUTION:For each compressing process block formed by providing audio data, recorded in 8-bit units in the travel direction of the film, successively at a right angle to the film travel direction, C1 parity is added and for every specific number of compressing process blocks, C2 parity is added. For each compressed block, an error correction is performed with the C1 parity and for every plural compressed block, an error correction is made with the C2 parity.

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. Perforation) is provided.
Further, an analog sound track is linearly provided along the winding direction of the film between the video recording area and either one of the perforations, and an analog audio track is recorded on the analog sound track. It was like this.

However, with the development of digital technology in recent years, there has been a movement to digitally record the above audio information. The recording positions of the video recording area and the analog sound track are SMPTE (Society of M) which is an association of movie and television engineers in America.
Since the audio information (audio data) is standardized by audio picture and television encoders, the digitized audio information (audio data) 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]

The scratches on the motion picture film include vertical scratches along the running direction of the film and lateral scratches along the direction orthogonal to the running direction of the film. Due to the use of (projection), there are more vertical scratches than horizontal scratches.

On the other hand, in the conventional motion picture film, audio data and the like are recorded in a direction orthogonal to the moving direction of the motion picture film. There has been a problem that audio data is destroyed over the entire range and reproduction becomes impossible.

The present invention has been made in view of the above-mentioned problems, and a movie capable of accurately reproducing audio data and the like without being affected by horizontal and vertical scratches on a movie film. The purpose is to provide a film.

[0013]

In the motion picture film according to the present invention, a digital sound track on which audio data to which a code for error correction is added in units of n bits is recorded is formed along the film running direction. The above-mentioned problem is solved by a motion picture film in which a data pattern of audio data in n-bit units is arranged and recorded in the digital sound track along the film running direction.

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 a product for performing error correction on the digital sound track. The above problem is solved by recording a pattern of audio data to which a code is added.

Further, the motion picture film according to the present invention is a motion picture film in which a digital sound track in which audio data to which a code for error correction is added is recorded in units of n bits is formed along the film running direction. In addition, a product code for error correction is added to the digital sound track, and a data pattern of n-bit unit audio data is arranged and recorded along the film running direction. To solve.

[0016]

In the motion picture film according to the present invention, since the data pattern of the audio data of n-bit unit is arranged and recorded in the digital sound track along the film running direction, the number of vertical scratches increases as the film is used. Even if it occurs, it is possible to stop the data destruction to the minimum of about n bits.

Further, since the motion picture film according to the present invention records the audio data pattern to which the product code for error correction is added to the digital sound track, even if the above-mentioned vertical scratches or horizontal scratches occur. The error correction of the audio data can be performed, and it can contribute to the accurate reproduction of the audio data.

[0018]

The preferred embodiments of the motion picture film of the present invention will be described in detail below 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.

The digital soundtrack 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 includes 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 digital sound track 5L includes channels (C), (L), (LC), (S).
L), (SW), and (RM) audio data Cn, L
n, LCn, SLn, SWn, and RMn are recorded 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 channels (C), (R), (RC), (SR), (S).
W), (LM) audio data Cn, Rn, RC
n, SRn, SWn, and LMn are recorded as a set of audio data of the right channel system.

The 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 motion picture 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 designed so that the audio data for the right channel is reproduced earlier than 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 the motion picture film recording apparatus as shown in FIG.

The above-mentioned movie film recording apparatus uses the left mix channel (L) from the audio data Ln, LCn, SLn of the respective channels (L), (LC), (SL).
Mixer 11 for forming M) audio data LMn
L, a mixer 11R that forms audio data RMn of the right mix channel (RM) from the audio data Rn, RCn, and SRn of the channels (R), (RC), and (SR), and left-channel audio data. Encoders 12a to 12f for encoding and encoders 12g to 12 for encoding right channel audio data.
1, a left channel multiplexer 13L for serially transmitting the left channel audio data encoded by the encoders 12a to 12f, and a right channel audio encoded by the encoders 12g to 12l. It has a right channel multiplexer 13R for serially transmitting data.

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, in FIG. 3, the audio data Cn of the center channel (C) is the encoder 12
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 the channels (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 the channels (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), and (SL).
Left mix channel (LM) from LCn, SLn
The audio data LMn of the above is formed and is supplied to the encoder 12l. Further, 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 12f. Supply to.

The encoders 12a to 12f have channels (C), (L), (LC), (SL), (S).
W), (RM) audio data Cn, Ln, LC
n, SLn, SWn, and RMn are left-channel audio data, and high-efficiency encoding (A) combining these with band division encoding, orthogonal transform encoding, bit allocation, etc.
TRAC) processing is performed to compress the data amount to ⅕, and these are supplied to the multiplexer 13L.

The encoders 12g to 12l have channels (C), (R), (RC), (SR),
(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 the encoders 12a to 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 receives the right channel audio data supplied in parallel from the encoders 12g to 12l as Cn, Rn, RCn,
Serial conversion is performed in the order of 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 shifted 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 signal 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 and the like to the audio data and supply them to the recorders 17L and 17R.

The recorders 17L and 17R record the audio data into 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, as shown in FIG. 5, 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. 5, first, in the first data string R00, the auxiliary data U0 to U for the 11 symbols is written.
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.

Further, 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.

Further, 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.

In the eighteenth data string R17, of the surround left channel audio data of 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.

Further, 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 this 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.

The second and third data strings R01 to R0 are also included.
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.

The fifth to seventh data strings R04 to R0 are also included.
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.

The eighth data string R7 contains 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.

Further, in the 16th data string R15, the audio data SR146 to SR177 of the surround right channel for the remaining 32 symbols of the audio data of the surround right channel for the above 178 symbols are recorded, followed by this. 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.

Further, in the nineteenth data string R18, of the left 119-symbol left mix channel audio data, the remaining 22 symbols of left mix channel audio data LM97 to LM118 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 includes 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 also be configured as follows.

That is, as the left-channel audio data of one compression processing block, a 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, as shown in FIG. 9, 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. 5, first, a header H0 for 1 byte is recorded in the first data string R00, followed by 3 bytes of level control data Le0.
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.

Further, the second to fourth data strings R01 to R0
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 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.

The ninth data string R8 contains 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 out of the audio data for the left channel for the above 182 symbols.
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 fourteenth to seventeenth 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, audio data SL181 for the remaining one symbol of the audio data of the surround left channel for 182 symbols is recorded, followed by right mixing for 114 symbols. 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 for 43 symbols of the 114-symbol right mix channel audio data.
42 to RM84 are recorded.

Further, in the twentieth data string R19, the remaining 29 symbols of the audio data RM85 to RM113 of the 114-symbol right mix channel audio data 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.

The right channel audio data of one compression processing block is 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, for each symbol along the film advancing direction, and the audio data of this one symbol is orthogonal to the film advancing direction. 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.

Further, 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.

Further, 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 the 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, 43 symbols of audio data LM out of the 114 symbols of the left mix channel audio data are recorded.
33 to LM75 are recorded.

Further, in the 17th data string R16, the audio data LM76 to LM113 of the remaining 38 symbols of the audio data of the left mix channel of 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 User data U0 to U7 of symbols are recorded.

That is, in FIG. 9 and FIG. 11, the one compression processing block corresponds to each of the data strings R00 to R1.
It is formed by recording each audio data of 43 symbols in 9.

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 over 58 dots along a direction orthogonal to the film advancing direction and 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, and 1 dot is recorded 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 total compression processing blocks # 0
~ # 7 (20 symbols x 8 symbols = 160 symbols)
Is set as an ECC top half block and C2 parity of 32 symbols is added, and 9th to 16th compression processing blocks # 8 to #F (20 symbols × 8 symbols = 160 symbols) are set as ECC bottom half blocks 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 of 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 corresponds to 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 direction of travel of the film,
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 leading data 50, as shown in FIG. 17, for example, the preamble 55 is recorded as a black-and-white repeating pattern of 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, audio data may be recorded in each of the digital sound tracks 5R and 5L for each film block as shown in FIG. 18, for example.

That is, in FIG. 18, the film block includes the head data 50 and a light-shielding region 51 formed in a black band shape along the film advancing direction on the film edge side of each digital sound track. , 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 repeating pattern for each dot along the traveling direction of the film.
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 recorded symmetrically 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 10L and 10R provided with a reading unit for one line in the direction orthogonal to the moving direction of the motion picture film 1, and the first CCD line sensor 10L. 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 10R.

Further, in the above-mentioned movie film reproducing apparatus, an error correction circuit 22L for performing error correction processing on the left channel audio data from the demodulator 21L and the right channel audio data from the demodulator 21R are generated. 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.

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 above-mentioned 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. 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 motion picture 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 for 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 demodulators 21L and 21R perform the demodulation processing on the audio data.
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 this 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, as the scratches on the motion picture film 1, there are vertical scratches along the running direction of the motion picture film 1 caused by running the motion picture film 1 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 depending on 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 advancing 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 addition, in the audio data recorded on the motion picture film 1, one dot has a length x length 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 the center channel (C) audio data Cn, the right channel (R) audio data Rn, and the center right from the right channel audio data serially supplied from the error correction circuit 25R. 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.

The decoder 26g also 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 of the center channels of the right channel system and the left channel system, the one that has been subjected to error correction is selected and output. In addition, the data selector 27b
Selects and outputs one of the left-channel audio data and the left-channel audio data that has been subjected to error correction. In addition, the data selector 27c
Selects and outputs one of the left center channel audio data and the left mix channel audio data that has been subjected to error correction. The data selector 27d selects and outputs one of the left surround audio data and the left mix channel audio data that has been error-corrected.

The data selector 28a selects and outputs one of the right-channel audio data and the right-mix channel audio data that has been error-corrected. Further, the data selector 28b selects and outputs one of the audio data of the right center channel and the audio data of the right mix channel that has been error-corrected. In addition, the data selector 28
c selects and outputs one of the audio data of the right subwoofer and the audio data of the right mix channel that has been error-corrected. Further, the data selector 28d selects and outputs one of the audio data of each subwoofer 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 which is recorded and in which the right channel audio data SRn, Rn, RCn are recorded. Audio data LMn of the left mix channel (LM) 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, the audio data Ln, LCn, SLn of the left channel is generated.
Since the mixed audio data LMn can be reproduced, a left system signal can be generated from this.

Further, for example, as shown in FIG. 24, scratches or the like are made in the horizontal direction due to hand cutting or the like, and Cn + α, Ln + α, LCn + α, SLn + α, SWn in the left system.
+ Α, RMn + α data becomes unreproducible and Cn, Rn, RCn, SRn, SWn, LMn data becomes unreproducible in the right system, the time series n data in the left system is already 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),
The SW is recorded in each of the digital sound tracks 5L and 5R. In this way, by including the audio data of the channel that seems to be particularly important in duplicate, even if the encoding operation of one of the combiners is impossible, the reproduction can be performed when the other combiner is possible. , Can more effectively compensate for sound breaks.

Then, the data reproduced by this reproducing device is
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 the reproduced sound based on the audio data Cn of the center channel (C), and outputs the most important reproduced sound such as the dialogue of the actor.

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.

The left speaker 106 and the right speaker 107 are arranged on the left and right sides of the clean 101, and output a reproduced sound by the audio data Ln of the left channel (L) and a reproduced sound by the audio data SR of the right channel. It produces stereo sound effects.

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 by 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. Particularly 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 become unstable depending on the position of the seats. However, by adding the center left speaker 104 and the center right speaker 105, the sound image becomes more realistic. It is effective in creating localization.

Further, the surround left speaker 108
The surround right speaker 109 and the surround right speaker 109 are arranged so as to surround the spectators' seats, and the reproduced sound by the audio data SL of the surround left channel and the surround right channel (S
R) outputs the reproduced sound based on the audio data SRn, and has the effect of giving the impression of being surrounded by reverberation, 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 sound track 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 become the audio data. The CCD line sensor 20L is recorded at a position that is 90 ° out of phase with the film traveling 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. 23, the tracking pattern 5 read by the CCD line sensor 20L.
3a, 53b, audio data, etc. are amplified by the amplifier circuit 20.
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 it 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 of 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.

In addition, the third delay circuit 213 is similar to that of 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.

Further, the fourth delay circuit 214 has the same configuration as that of 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 for detecting 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 so controlled as 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 it 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.

Also, 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 hold data of the dot separated by 2 dots from the last dot of the inclination detection pattern 56 from the sample hold circuit 203, and the last sample hold data from the sample 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 through 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 forms the addition data by adding the detection outputs of the polarity-inverted difference. 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 a 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 the sawtooth wave indicating the error of the read timing.

As a result, 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 embodiment, the dot size of each data is 24.0 μm in the horizontal direction. However, this is 24 μm such as 23.9 μm and 24.1 μm. Of course, it can be changed as appropriate.

[0185]

In the motion picture film according to the present invention, since the data pattern of the audio data of n-bit unit is arranged along the moving direction of the film, and the product code for error correction is added, It is possible to reproduce audio data accurately without being affected by vertical or horizontal scratches on the film.

[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.

[Explanation of symbols]

 1 Movie film 1L Left edge of movie film 1R Right edge of movie film 2 Video recording area 3L, 3R Perforation 4L, 4R Analog sound track 5L, 5R Digital sound track 50 Start data 51a, 51b Light shield area 52 Audio data 53a, 53b Tracking Pattern 55 Preamble 56 Tilt detection pattern 57 Block ID 58 Start bit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoichi Tachi 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Akiyuki Yoshida 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo No. Sony Corporation (72) Inventor Toshiaki Setogawa 6-735 Kitashinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (3)

[Claims] 1. A motion picture film in which a digital sound track on which audio data to which a code for error correction is added is recorded in units of n bits is formed along a film running direction, and n is added to the digital sound track. A motion picture film in which a data pattern of audio data in bit units is arranged and recorded along the film running direction. 2. A digital sound track on which audio data is recorded is a motion picture film formed along a film running direction, and a pattern of audio data in which a product code for error correction is added to the digital sound track. A movie film characterized by being recorded. 3. A motion picture film, wherein a digital sound track on which audio data to which a code for error correction is added in units of n bits is recorded is a movie film formed along a film running direction, and the digital sound track has an error. A motion picture film characterized in that a product code for correction is added, and a data pattern of audio data in n-bit units is arranged and recorded along the film running direction.