JP2017188831A - Image recording device and control method of the image recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a stop/start operation in recording of a moving image to a plurality of recording media by synchronizing the start/stop operation with a start/stop operation of a proxy.SOLUTION: An image processing device comprises: a first codec that codes a moving image signal to be inputted and records the signal to a plurality of recording media; a second codec that encodes the moving image data stored to a memory by a system different from the first codec and stores the data to the recording media; output means of converting the moving image data stored to the memory to a moving image signal and outputting the signal to the first codec; and control means of controlling the output means so as to add and output recording instruction information that instructs the recording in each recording medium to the moving image signal when outputting the moving image data recorded in the memory to the first codec after the second codec has started the recording and so as to output without adding the recording instruction information after the second codec has stopped the recording.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an image recording apparatus and an image recording apparatus control method, and more particularly to an image recording apparatus that outputs a moving image signal and a recording control signal to a codec.

  Conventionally, a video camera that captures a moving image and records it on a recording medium is known. A system has also been proposed in which a captured moving image is output to a recording device outside the apparatus, and the moving image is recorded by the external recording device (see, for example, Patent Document 1). In this conventional technique, recording of a moving image is started in response to a recording start instruction from the camera body, and output of the moving image to an external device is started.

  In addition, the recording of the moving image is stopped according to the instruction to stop the recording, and the output of the moving image to the external device is stopped. With this configuration, it is possible to start / stop moving image recording in an external recording device in synchronization with the start / stop of recording in the video camera. As a result, the same moving image as the moving image taken by the video camera can be recorded in the external recording device.

Further, Patent Document 2 proposes to output a recording start / stop command synchronized with the video camera body to an external device for interval shooting in which a predetermined number of moving images are repeatedly recorded every predetermined period. ing.
It is also conceivable to use a general-purpose interface such as SDI as an interface between the image processor inside the camera and the codec LSI. The image processor can be designed more easily than the dedicated interface, and the cost can be reduced.

  On the other hand, in recent video cameras, encoding processing is performed before a recording start operation is performed, and a moving image is stored in a memory. And when a recording instruction is given, a pre-recording function is provided that can record a moving image from several seconds before when a recording start operation is performed by reading and recording the moving image stored in the memory. Some have. In addition, among the multiple recording media, one of the recording media always records a moving image to prevent missed shooting, and when there is no more free space on one of the recording media, switch to the other recording medium. A relay recording function that continues recording has also been proposed.

Japanese Patent Laid-Open No. 2002-232821 JP 2011-244293 A

However, in the above-described conventional example, the start / stop of digital output itself is controlled with respect to the external device, or only one recording state is instructed by regarding the external device as one recording medium. .
In addition, when a general-purpose interface such as SDI is used as an interface between the image processor and the codec LSI, in order to realize functions other than the control commands prepared in the general-purpose interface, the following are necessary. There is. That is, in order to realize a function other than the prepared control command, it is necessary to give a more detailed instruction using another interface. When a control command is sent separately, it is difficult to start recording from a predetermined frame or instruct to stop at a predetermined frame in synchronization with a moving image.

In particular, in order to record a video for editing (hereinafter referred to as a proxy) whose screen size and data rate are smaller than the main video separately from the main video, when the proxy codec is separately provided, the main video and the proxy are from the same frame. It is necessary to start recording and stop recording at the same frame.
Therefore, there are the following problems.

When a plurality of recording media are connected to the external device / codec LSI, there is a problem in that the recording start / stop instruction synchronized with the proxy in units of frames cannot be performed for each of the plurality of recording media.
In addition, there is a problem that the pre-recording instruction cannot be performed by the external device / codec LSI.
Further, when a plurality of recording media are connected to the external device / codec LSI, there are the following problems. At the timing of relay recording on another recording medium, the file recorded by the proxy codec cannot be divided into the corresponding file after relaying with the corresponding file before relaying.
In view of the above-described problems, an object of the present invention is to control the start and stop of moving image recording on a plurality of recording media in synchronization with the start and stop of a proxy.

  The image recording apparatus of the present invention encodes an input moving image signal and records it on a plurality of recording media, and moving image data stored in a memory in a system different from the first codec. A second codec that encodes and records on a recording medium; an output unit that converts the moving image data stored in the memory into a moving image signal and outputs the moving image signal; and the second codec When recording is started, when moving image data recorded in the memory is output to the first codec, recording instruction information for instructing recording for each recording medium is added to the moving image signal and output, Control means for controlling the output means to output without adding the recording instruction information when the second codec stops recording.

  According to the present invention, it is possible to control the start and stop of recording on a plurality of recording media in synchronization with the start and stop of proxy recording.

It is a block diagram explaining the structural example of the video camera incorporating one Embodiment of the image recording device concerning this invention. It is a figure which shows the example of a structure of encoding instruction information and recording instruction information. It is a flowchart explaining the procedure of a normal recording process. It is a flowchart explaining the procedure of a pre-recording process. It is a flowchart explaining regular recording processing. It is a flowchart explaining relay recording processing.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram for explaining a configuration example of a video camera implemented as an embodiment of an image recording apparatus according to the present invention. In the present embodiment, the first codec and the recording medium are built in the video camera body. However, the first codec and the recording medium connected to the first codec and the recording medium are images as external devices. It is also possible to adopt a configuration independent of the main body of the recording apparatus. In this case, a moving image signal is transmitted from the video camera to an external device by wire or wirelessly.

The configuration and basic functions of the video camera will be described with reference to FIG.
The image acquisition unit 101 includes an imaging unit, an image processing unit, and the like, acquires moving image data by the imaging unit, performs various correction processes, generates moving image data, and outputs the moving image data to the memory 102.
The memory 102 stores moving image data and also functions as a work memory used by the CPU 103.
The CPU 103 controls each part of the video camera according to a given program, and realizes each process of the flowchart described later.

  The moving image signal output unit 104 reads out moving image data stored in the memory 102, converts it into an SDI (Serial Digital Interface) signal, and outputs it to the first codec 105. Further, according to an instruction from the CPU 103, the encoding instruction information and the recording instruction information for each recording medium are added to the SDI signal as predetermined ancillary data (Ancillary Data). Since the ancillary data is superimposed at a predetermined position in the blanking period for each frame, the instruction information can be specified in units of frames.

  FIG. 2 shows an example of the structure of the encoding instruction information and the recording instruction information for each recording medium. In this example, instruction information is assigned to each bit in one byte to be superimposed as ancillary data. It has a recording instruction flag for the first recording medium 107, a recording instruction flag for the second recording medium 108, and an encoding instruction flag.

  When receiving the SDI signal, the first codec 105 locks (synchronizes) to the frame / horizontal / vertical synchronization timing of the SDI signal. As a result, the contents of the SDI signal can be acquired correctly. This locking process may require a period of several frames, and it is necessary to input the SDI signal and lock the first codec 105 before starting recording.

  Next, the first codec 105 acquires an encoding instruction flag and a recording instruction flag from the ancillary data superimposed on the SDI signal. When the encoding instruction flag is set, the moving image data input as the SDI signal is encoded according to the first encoding format and stored in the work memory. The first codec 105 may include a work memory for encoding, or may be used by sharing the memory 102. Examples of the first encoding format include MPEG2 format, H.264, and so on. H.264 format. Note that the first codec 105 can be configured to have an encoding function and no decoding function.

In the case of normal recording, a recording instruction flag for each recording medium is further set, and the encoded data is extracted from the work memory, and the corresponding first recording medium 107 and second recording medium 108 are animated. Record as an image file.
On the other hand, in the pre-recording mode, the recording instruction flag is not set. When the encoded data continues to accumulate in the work memory and the data accumulates to the upper limit of the work memory, the first data is overwritten.

  Thereafter, when a recording start operation is performed by the user, a recording instruction flag is set accordingly. When the recording instruction flag is set, the first codec 105 starts recording on the first recording medium 107 and the second recording medium 108 including data already accumulated in the work memory.

  The second codec 106 reads out the moving image data stored in the memory 102, encodes it according to the second encoding format, and stores it in the work memory. There are cases where the second codec 106 includes a work memory for encoding, and cases where the memory 102 is shared and used. In the case of normal recording, the encoded data is extracted from the work memory and recording on the third recording medium 109 is started. In the present embodiment, the second codec 106 encodes moving image data with a different encoding method from the first codec 105, but the second codec 106 encodes the same encoding format as the first codec 105. Also good. In addition, the second codec 106 can be configured to have an encoding function and no decoding function.

In the pre-recording mode, data encoded in the work memory continues to accumulate, and when data reaches the upper limit of the work memory, the first data is overwritten. Thereafter, when a recording start operation is performed by the user, recording is started on the third recording medium 109 including data already accumulated in the work memory.
The moving image data recorded by the second codec 106 is mainly used as a proxy. For this reason, the second codec 106 often reduces the bit rate such that the resolution is smaller than the moving image data encoded by the first codec 105 or the compression rate is large.

The first recording medium 107, the second recording medium 108, and the third recording medium 109 are, for example, randomly accessible recording media such as flash memory cards. These recording media 107 to 109 can be attached to and detached from the video camera by a mounting / discharging mechanism (not shown). The CPU 103 manages various data to be recorded on the recording media 107 to 109 as files according to a known file system such as a FAT file system.
The display unit 110 displays moving image data stored in the memory 102, displays a menu for user operations and various types of information.

Next, the encoding instruction flag and recording instruction flag control processing executed by the CPU 103 will be described with reference to FIGS. 3, 4, 5, and 6.
FIG. 3 is a flowchart showing normal recording processing for recording the same moving image on the first recording medium 107 and the second recording medium 108. 4 is a flowchart showing the pre-recording process, FIG. 5 is a constant recording process, and FIG. 6 is a flowchart showing the relay recording process.

With reference to the flowchart of FIG. 3, the normal recording processing procedure executed under the control of the CPU 103 will be described.
First, in step S <b> 301, the CPU 103 instructs the image processing unit of the image acquisition unit 101 to store image data for one frame in the memory 102. The flowchart in FIG. 3 has a loop structure, and after the image data of this frame is output to the first codec 105 in S307, the process returns to S301. This one loop corresponds to processing for one frame. For example, when a moving image is recorded at 60 fps, 60 loops are processed per second.

In S302, the CPU 103 determines whether or not recording is in progress. If not, the process proceeds to S303. If recording is in progress, the process proceeds to S312.
In S303, the CPU 103 determines whether or not a recording start operation has been performed by the user. If the operation has been performed, the process proceeds to S304, and if not, the process proceeds to S305.
In step S304, the CPU 103 instructs the second codec 106 to prepare for recording start. Preparation for recording start includes, for example, initialization of the internal circuit of the codec and return from the power saving mode, and making it possible to input image data. That is, since image data cannot be input to the second codec 106 until preparation is completed, the CPU 103 determines in S305 whether preparation of the second codec 106 is completed.

If the recording start operation has not been performed in the previous loop, the process proceeds to S305, where NO is always determined, and the process proceeds to S306. On the other hand, even if the recording operation is performed through S304 in the previous loop, the process proceeds to S306 until the preparation is completed.
In step S306, the CPU 103 instructs the moving image signal output unit 104 to clear the encoding instruction flag and the recording instruction flag, and then proceeds to step S307.
In step S <b> 307, the CPU 103 reads out image data for one frame from the memory 102 and issues an instruction to send an SDI signal to the first codec 105. As described above, since the first codec 105 needs to be locked to the SDI signal, it outputs the SDI signal even during recording.

If it is determined in S305 that the preparation is complete, the process proceeds to S308, and the encoding instruction flag is set. Then, it progresses to S309.
In S309, if the first recording medium 107 is recordable, the CPU 103 sets the first recording instruction flag and proceeds to S310.

In S310, the CPU 103 sets a second recording instruction flag if the second recording medium 108 is recordable.
Finally, in step S311, the CPU 103 instructs the second codec 106 to read image data from the memory 102 and perform encoding. Thereafter, the process proceeds to S307, and the SDI signal of the same image data in which the encoding instruction flag and the recording instruction flag are set is also output to the first codec 105.

In subsequent loops, it is determined in S302 that recording is in progress, and the process proceeds to S312.
In step S312, the CPU 103 determines whether a recording stop operation has been performed by the user. If the operation has been performed, the process proceeds to S313, and if the operation has not been performed, the process proceeds to S314.
In step S313, the CPU 103 instructs the second codec 106 to stop recording.

  In the second codec 106, inter-frame compression is often performed in order to increase the compression rate. In this case, it is necessary to stop recording in units of GOP (Group Of Pictures) in which a plurality of frames are combined. . For example, if 1 GOP is composed of 15 frames, even if recording is stopped in the middle of the 15 frames, it cannot be stopped until the 15th frame is processed. Therefore, in step S314, the CPU 103 determines whether recording has stopped.

If the recording of the second codec 106 is not stopped in S314, the process proceeds to S308, and the encoding instruction flag and the recording instruction flag are continuously set in the first codec 105. When the recording is stopped, the process proceeds to S306, where the encoding instruction flag and the recording instruction flag are cleared in the first codec 105.
If the first codec 105 is also performing inter-frame compression, the first codec 105 can stop recording at the GOP boundary by the above control by matching the GOP boundary with the second codec 106. It becomes possible.

Next, the procedure of the pre-recording process will be described using the flowchart of FIG.
In step S <b> 401, the CPU 103 instructs the image processing unit of the image acquisition unit 101 to store image data for one frame in the memory 102. The flowchart in FIG. 4 has a loop structure similar to the flowchart in FIG. 3, and after S 407 outputs image data of this frame to the first codec 105, the process returns to S 401.

In S402, the CPU 103 determines whether or not pre-recording is in progress. If pre-recording is not in progress, the process proceeds to S403. If pre-recording is in progress, the process proceeds to S412.
In S403, the CPU 103 determines whether or not a pre-recording start operation has been performed by the user. If the operation has been performed, the process proceeds to S404, and if not, the process proceeds to S405.

In step S <b> 404, the CPU 103 instructs the second codec 106 to prepare for starting pre-recording. Preparation for the start of pre-recording is, for example, initialization of a codec internal circuit and return from a power saving mode, as in the case of normal recording, so that image data can be input. That is, until the preparation is completed, image data cannot be input to the second codec 106, and it is determined whether or not the preparation is completed in S405.
If no pre-recording operation has been performed in the previous loop, the process proceeds from S403 to S405, where NO is always determined, and thus the process proceeds to S406.
On the other hand, even if the recording operation is performed through S404 in the previous loop, the process proceeds to S406 until the preparation is completed.

In step S406, the CPU 103 instructs the moving image signal output unit 104 to clear the encoding instruction flag and the recording instruction flag, and then proceeds to step S407.
In step S <b> 407, the CPU 103 reads out image data for one frame from the memory 102 and issues an instruction to send an SDI signal to the first codec 105.
On the other hand, if it is determined in S405 that the preparation is completed, the process proceeds to S408, and the CPU 103 determines whether a recording start operation has been performed by the user.

If it is determined in S408 that an operation has been performed, the process proceeds to S304 in the flowchart of FIG. When the recording start operation is performed and the recording is started, the equivalent process of the flowchart of FIG. 3 is executed, and when the stop of the recording is completed, the process returns from S307.
On the other hand, if the recording start operation has not been performed, the process proceeds to S409.

In S409, the CPU 103 sets an encoding instruction flag, and then proceeds to S410.
In S410, since no recording is performed, the first recording instruction flag and the second recording instruction flag are cleared. Then, it progresses to S411.
Finally, in S411, the CPU 103 instructs the second codec 106 to read out the image data from the memory 102 and perform encoding. Thereafter, the process proceeds to S407, and the SDI signal of the same image data in which the encoding instruction flag is set and the recording instruction flag is cleared is also output to the first codec 105.

In subsequent loops, if it is determined in S402 that pre-recording is in progress, the process proceeds to S412.
In S412, the CPU 103 determines whether or not a pre-recording stop operation has been performed by the user. If the operation has been performed, the process proceeds to S413, and if the operation has not been performed, the process proceeds to S408.
In step S413, the CPU 103 instructs the second codec 106 to stop pre-recording. The stop of the pre-recording is only to discard the already buffered moving image data, so that the second codec 106 is immediately stopped and completed. Therefore, the process proceeds to S406 as it is, and the encoding instruction flag is cleared and the SDI signal is output to the first codec 105.

Next, the constant recording process will be described with reference to the flowchart of FIG.
In step S <b> 501, the CPU 103 instructs the image processing unit of the image acquisition unit 101 to store image data for one frame in the memory 102. The flowchart in FIG. 5 has a loop structure similar to the flowchart in FIG. 3, and after S 505 outputs image data of this frame to the first codec 105, the process returns to S 501.

In step S502, the CPU 103 determines whether or not recording is constantly performed. If the recording is not always performed, the process proceeds to step S503. If the recording is always performed, the process proceeds to step S510.
In S503, the CPU 103 determines whether or not the user has always performed a recording start operation. If the operation has been performed, the process proceeds to S506, and if not, the process proceeds to S504.
In step S504, the CPU 103 instructs the moving image signal output unit 104 to clear the encoding instruction flag and the recording instruction flag, and then proceeds to step S505.
In step S <b> 505, the CPU 103 reads out image data for one frame from the memory 102 and issues an instruction to send an SDI signal to the first codec 105.

When continuous recording is started, first, in step S506, the CPU 103 determines whether a recording start operation has been performed by the user. If the operation has been performed, the process proceeds to S304 in the flowchart of FIG. When the recording is started, the equivalent process of the flowchart of FIG. 3 is executed, and when the stop of the recording is completed, the process returns from S307. On the other hand, if the recording start operation has not been performed, the process proceeds to S507.
In S507, the CPU 103 sets an encoding instruction flag.

  In the present embodiment, recording is always performed on the first recording medium 107, and the CPU 103 sets the first recording instruction flag in S508. Conversely, in S509, the second recording instruction flag is cleared. Thereafter, the process proceeds to S505, where the SDI signal with the encoding instruction flag and the first recording instruction flag set and the second recording instruction flag cleared is output also to the first codec 105.

In subsequent loops, it is determined in S502 that recording is always in progress, and the process proceeds to S510.
In step S510, the CPU 103 determines whether or not a recording stop operation has been performed by the user. If the operation has not been performed, the process proceeds to step S506. If the recording stop operation is always performed by the user, the process proceeds to S504, and the CPU 103 clears the encoding instruction flag and the recording instruction flag, and instructs the first codec 105 to output the SDI signal.
In the above-described embodiment, in the constant recording mode processing of the predetermined recording mode, recording is always performed on the first recording medium 107 and recording is started on the second recording medium 108 by the user's recording start operation. The reverse case of always recording on the second recording medium 108 is also possible.

Next, the relay recording process will be described with reference to the flowchart of FIG.
The relay recording process is realized by replacing S309 to S310 with S601 to S609 in FIG. 6 in the flowchart of the normal recording process in FIG. In this embodiment, recording is first performed on the first recording medium 107 and is not recorded on the second recording medium 108.

  After setting the encoding instruction flag in S308 of the flowchart of FIG. 3, in S601, the CPU 103 checks the free capacity of the first recording medium 107 and determines that the free capacity is insufficient to continue recording. If so, the process proceeds to S602.

  In step S <b> 602, the CPU 103 instructs the second codec 106 to divide the file being recorded. File division refers to a process of closing a currently recorded file, opening a new file, and continuing recording. At this time, the encoded moving image data is buffered so that frames are not lost between the old and new files.

  Since the recording of the second codec 106 is often used as proxy recording, if the file recorded by the first codec 105, which is the main recording, is divided by the relay recording process, the same applies. The file will be split. As a result, a proxy moving image file corresponding to each of the moving image file before the relay recording and the moving image file after the relay recording is created, and the work at the time of moving image editing becomes easy.

  However, as described above, when the second codec 106 performs inter-frame compression, it is necessary to divide in GOP units. For example, if 1 GOP is composed of 15 frames, even if a file division instruction is received in the middle of the 15 frames, it cannot be divided until the 15th frame is processed. Therefore, in step S603, the CPU 103 determines whether the file division is completed.

When the file division is completed in S603, the process proceeds to S604, and the CPU 103 sets a variable indicating the recording medium being recorded in the second recording medium 108. The variable indicating the recording medium being recorded is originally set in the first recording medium 107 when recording on the first recording medium 107 is started.
If it is determined in S601 that the free space is not insufficient, the process proceeds to S603, but since the file division process by the second codec 106 is not executed, the determination is always NO, and the process proceeds to S605. On the other hand, even if the file division process is performed through S602 in the previous loop, the process proceeds to S605 until the file division process is completed.

In step S <b> 605, the CPU 103 determines whether recording is being performed on the first recording medium 107. If recording is being performed on the first recording medium 107, the process proceeds to S606, and the first recording instruction flag is set. Thereafter, the process proceeds to S607.
In step S607, the CPU 103 clears the second recording instruction flag, and then proceeds to step S311 in the flowchart of FIG.
On the other hand, if it is determined in S605 that recording is being performed on the second recording medium 108, the process proceeds to S608, and the first recording instruction flag is cleared. Thereafter, the process proceeds to S609.
In step S609, the CPU 103 sets the second recording instruction flag and then proceeds to step S311.
In the above-described embodiment, relay recording is performed from the first recording medium to the second recording medium. However, the reverse case of relay recording from the second recording medium to the first recording medium is also possible.

  Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. A part of the above-described embodiments may be appropriately combined.

(Other embodiments)
The present invention is also realized by executing the following processing. That is, software (computer program) that implements the functions of the above-described embodiments is supplied to a system or apparatus via a network or various computer-readable storage media. Then, the computer (or CPU, MPU, etc.) of the system or apparatus reads out and executes the program.

101 Image acquisition unit 102 Memory 103 CPU
104 moving image signal output unit 105 first codec 106 second codec 107 first recording medium 108 second recording medium 109 third recording medium 110 display unit

Claims (8)

A first codec that encodes an input moving image signal and records it on a plurality of recording media;
A second codec that encodes moving image data stored in a memory in a manner different from that of the first codec, and records the encoded data on a recording medium;
Output means for converting the moving image data stored in the memory into a moving image signal and outputting the converted signal to the first codec;
When the second codec starts recording, when the moving image data recorded in the memory is output to the first codec, recording instruction information for instructing recording for each recording medium is added to the moving image signal. Control means for controlling the output means to output without adding the recording instruction information when the second codec stops recording,
An image recording apparatus comprising: In the pre-recording mode in which the second codec performs encoding and recording on a recording medium,
The control means includes
When outputting the encoded moving image data to the first codec, encoding instruction information for instructing encoding is added to the moving image signal and output, and the second codec performs recording on the recording medium. 2. The image recording apparatus according to claim 1, wherein, when started, the output unit is controlled to output the recording instruction information for instructing recording for each recording medium added to the moving image signal. In a given recording mode
The control means includes
Out of a plurality of recording media connected to the first codec, the recording instruction information for the first recording medium is added to the moving image signal and output,
When the second codec starts recording, the recording instruction information for the second recording medium connected to the first codec is also added and output,
2. The image recording apparatus according to claim 1, wherein when the second codec stops recording, the output unit is controlled not to add the recording instruction information to the second recording medium.   The image recording apparatus according to claim 3, wherein the predetermined recording mode is a constant recording mode. It further has a dividing means for dividing the file being recorded,
The control means includes
Synchronously with the recording start of the second codec, the recording instruction information for the first recording medium among the plurality of recording media connected to the first codec is added to the moving image signal. Output,
When the first recording medium is full, the recording instruction information for the second recording medium connected to the first codec is added without adding the recording instruction information for the first recording medium. Controlling the output means to perform additional switching,
5. The image recording apparatus according to claim 4, further comprising controlling the dividing unit to divide the data recorded by the second codec in synchronization with the switching.   The image recording according to any one of claims 1 to 5, wherein the first codec and the recording medium connected to the first codec are configured independently as external devices. apparatus. The first codec that encodes the input moving image signal and records it on a plurality of recording media, and the moving image data stored in the memory is encoded by a method different from that of the first codec, and is recorded on the recording medium. A method for controlling an image recording apparatus having a second codec,
An output step of converting the moving image data stored in the memory into a moving image signal and outputting the converted signal to the first codec;
When the second codec starts recording, when the moving image data recorded in the memory is output to the first codec, recording instruction information for instructing recording for each recording medium is added to the moving image signal. And a control step for controlling the output step so as to output without adding the recording instruction information when the second codec stops recording. Method.   A program that causes a computer to be executed as each unit of the image recording apparatus according to any one of claims 1 to 6.

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