Abstract:
An image processing apparatus includes circuitry configured to obtain audio data of audio collected through a microphone, determine whether the audio data has a noise level equal to or less than a threshold to generate a determination result, record the audio data when the determination result indicates that the noise level of the audio data is equal to or less than the threshold, and add the recorded audio data to image data.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This patent application is based on and claims priority pursuant to 35 U.S.C. §119(a) to Japanese Patent Application No. 2014-246036, filed on Dec. 4, 2014 in the Japan Patent Office, the entire disclosure of which is hereby incorporated by reference herein. 
     
    
     BACKGROUND 
       [0002]    1. Technical Field 
         [0003]    The present invention relates to an image processing apparatus, an audio recording method, and a non-transitory recording medium storing an audio recording program. 
         [0004]    2. Background Art 
         [0005]    Image forming apparatuses that collect sound from a sound input unit such as a microphone, digitize it into audio data, add the audio data into image data to output the image data with the audio data to other apparatuses via a network or store the audio data in a recording medium are appearing recently. 
         [0006]    In these image forming apparatuses, audio data is usually used for adding information to image data such as descriptions of image data, and it is usual to sample sound during scanning image data. However, if the image forming apparatus is operating, operating noise and surrounding noise are mixed into the sampled sound, degrading clarity of the audio data. 
         [0007]    To cope with issue, a facsimile machine that stops operating the mechanical system during recording audio and starts operating the mechanical system after finishing recording audio is known. In the known technology, in the facsimile machine that includes a sound recording/playing unit, an output unit that scans documents, a controller that controls turning the cooling fan on and off, and a storing unit that stores received data, if the facsimile machine is in idle state, the fan is turned off, it is stopped scanning documents, and the received data is stored in the storing unit if the received data exists. Subsequently, the fan is turned on after finishing recording sound, it is started to scan documents again, and the stored received data is output. 
         [0008]    That is, in the known technology, the data output unit, the scanning unit, and the mechanical unit such as the fan are stopped operating in recording sound, and the operation prohibition is released after finishing recording sound to suppresses the operating noise of the mechanical system from getting mixed in the recorded sound. 
       SUMMARY 
       [0009]    Example embodiments of the present invention provide a novel image processing apparatus that includes circuitry configured to obtain audio data of audio collected through a microphone, determine whether the audio data has a noise level equal to or less than a threshold to generate a determination result, record the audio data when the determination result indicates that the noise level of the audio data is equal to or less than the threshold, and add the recorded audio data to image data. 
         [0010]    Further example embodiments of the present invention provide a method of recording audio and a non-transitory recording medium storing an audio recording program. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]    A more complete appreciation of the disclosure and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings. 
           [0012]      FIG. 1  is a block diagram illustrating a configuration of a MFP as a first embodiment of the present invention. 
           [0013]      FIG. 2  is a block diagram illustrating a configuration of a control panel as the first embodiment of the present invention. 
           [0014]      FIG. 3  is a flowchart illustrating an audio recording process as the first embodiment of the present invention. 
           [0015]      FIG. 4  is a block diagram illustrating a configuration of a MFP as a second embodiment of the present invention. 
           [0016]      FIG. 5  is a flowchart illustrating an audio recording process as the second embodiment of the present invention. 
           [0017]      FIG. 6  is a block diagram illustrating a configuration of a MFP as a third embodiment of the present invention. 
           [0018]      FIG. 7  is a flowchart illustrating an audio recording process as the third embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0019]    In describing preferred embodiments illustrated in the drawings, specific terminology is employed for the sake of clarity. However, the disclosure of this patent specification is not intended to be limited to the specific terminology so selected, and it is to be understood that each specific element includes all technical equivalents that have the same function, operate in a similar manner, and achieve a similar result. 
         [0020]    In the embodiments described below, a novel image processing apparatus that ensures efficiency of the image processing operation and suppresses operating noise from getting mixed in sampling audio is provided. 
       First Embodiment 
       [0021]    A first embodiment is described below with reference to  FIGS. 1 to 3 .  FIG. 1  is a block diagram illustrating a configuration of a MFP in the first embodiment. 
         [0022]    In  FIG. 1 , a multifunction peripheral (MFP) (an image forming apparatus)  1  includes a main Central Processing Unit (CPU)  2 , a main Read Only Memory (ROM)  3 , a main Random Access Memory (RAM)  4 , a plotter  5 , a control panel  6 , an image scanner  7 , an image memory  8 , and a Local Area Network (LAN) interface (I/F)  9  etc., which are connected with each other via a bus  10 . 
         [0023]    In the main ROM  3 , an operating system for the MFP  1  as the image forming apparatus, an audio recording program that controls recording audio in this embodiment, and desired system data are stored. 
         [0024]    The main CPU  2  uses the main RAM as a work memory, controls entire MFP  1  to execute basic processes as the MFP  1 , and executes an audio recording method to control recording audio in this embodiment. 
         [0025]    That is, by reading the audio recording program that executes the image processing method in this embodiment stored in computer-readable media such as the ROM, an Electrically Erasable and Programmable Read Only Memory (EEPROM), an EPROM, a flash memory, a flexible disk, a Compact Disc Read Only Memory (CD-ROM), a Compact Disc Rewritable (CD-RW), a Digital Versatile Disk (DVD), a Secure Digital (SD) card, and a Magneto-Optical (MO) disc etc. and installing the audio recording program in the mROM  3 , the MFP  1  is constructed as the image forming apparatus that executes the audio recording method improving efficiency of an image processing operation (described later) and suppressing operating noise from getting mixed in sampling audio. The audio recording program is a computer-executable program written in legacy programming languages and object-oriented programming languages such as assembler, C, C++, C#, and Java etc., and the audio recording program can be distributed by storing in the recording medium described above. 
         [0026]    That is, the main CPU  2  executes a data editing process that adds audio data to image data and a control process that performs the audio recording operation only if noise included in the audio data is equal to or less than a predetermined threshold. 
         [0027]    A plotter using various printing method can be used as the plotter  5 . For example, a plotter that records and outputs an image on paper (recording medium) using electrophotographic method is used for the plotter  5 . In addition, the plotter  5  can be either a single-sided printer that forms an image on one surface of the paper or a double-sided plotter that forms images on both surfaces of the paper. Furthermore, the plotter  5  can include a post-processing unit that performs post-processing such as punching, folding, and stapling etc. That is, the plotter  5  performs a recording process that records and outputs an image on paper as the recording medium. 
         [0028]    For example, an image scanner etc. that uses a Charge Coupled Device (CCD) or Complementary Metal Oxide Semiconductor (CMOS) is used as the image scanner  7 . Usually, the image scanner  7  includes an Automatic Document Feeder (ADF). Multiple sheets of document is set on a document tray on the ADF, and the ADF transfers the document set on the document tray to a contact glass where document is scanned in an image scanner  7  one by one. The image scanner  7  scans the document transferred by the ADF or set on the contact glass to scan the image on the document at a predetermined resolution and output it as analog image data. The image scanner  7  includes an analog/digital (A/D) converter to convert analog image data into digital image data and output it to the main CPU  2 . It should be noted that the image scanner  7  can be a color scanner that scans a color document. In addition, in the ADF, a document sensor that detects an amount of the document set on the document tray is disposed. 
         [0029]    The RAM and/or the hard disk etc. are used as the image memory  8  that stores image data of the document scanned by the image scanner  7  and image data received by the LAN I/F  9  under the control of the main CPU  2 . 
         [0030]    The main CPU  2  reads the image data stored in the image memory  8 , transfers the read image data to a user terminal on the network via the LAN I/F  9  or output using the plotter  5 . In this case, the main CPU  2  converts the image data to have a format such as Tag Image File Format (TIFF), Joint Photographic Experts Group (JPEG), or Portable Document Format (PDF) to store the converted image data in the image memory  8 . 
         [0031]    The LAN I/F  9  is connected to a Local Area Network (LAN) for example. In addition, in this embodiment, the LAN I/F  9  is connected to other networks via a communication channel connected to the network. The LAN I/F  9  exchanges the image data and e-mail with terminals on the network and terminals (devices) on the other networks, e.g., personal computers and workstation etc. Especially the LAN I/F  9  transfers the image data that audio data is added. Any other data output interface may be used in alternative to the LAN I/F  9  as long as it has a function that can output the image data that audio data is added. For example, the data output interface can store the data in an external memory or an internal memory. 
         [0032]    As shown in  FIG. 2 , the control panel  6  includes a sub-CPU  11 , a sub-ROM  12 , a sub-RAM  13 , an audio output unit  14 , an audio recording key  15 , a recording time setting key  16 , a display  17 , a COmpressor/DECompressor (CODEC)  18 , an audio data memory  19 , a microphone  20 , a scanning key  21 , and a noise data memory  22  etc. 
         [0033]    The sub-ROM  12  stores a program for the control panel  6 , a part of program that the control panel  6  executes among the audio recording programs in this embodiment, and system data. 
         [0034]    The sub-CPU  11  performs processes as the control panel  6  by controlling entire control panel  6  using the sub-RAM  13  as a work memory based on the program stored in the sub-ROM  12 . More specifically, the sub-CPU  11  controls audio recording processes on the control panel  6  in this embodiment including an audio sampling process and an audio recording process using the microphone under the control of the main CPU  2 . 
         [0035]    For example, the audio output unit  14  may be implemented by a speaker and an audio output circuit etc. and amplifies the audio data to output it as audio. 
         [0036]    The audio recording key  15 , when selected by a user, starts recording audio and outputs operational information to the sub-CPU  11 . 
         [0037]    The recording time setting key  16  allows the user to configure recording time. For example, the recording time can be configured in units of a second. That is, the configuration of the recording time is not limited to setting arbitrary time in units of a second. For example, a number of recording times are registered in the sub-ROM  12  preliminarily, and it is possible to select the recording time used for recording audio among the multiple number of recording times. 
         [0038]    For example, a crystal liquid display is used for the display  17 , and the display  17  displays display data under the control of the sub-CPU  11 . Especially, the display  17  displays various information desired for the image processing along with recording audio in this embodiment under the control of the sub-CPU  11 . 
         [0039]    The CODEC  18  controls compressing/expanding audio data under the control of the sub-CPU  11 . For example, the CODEC  18  converts the audio data into digital data such as 
         [0040]    WAVe sound (WAV) and MPEG audio layer  3  (MP3). 
         [0041]    The audio data memory (audio memory)  19  stores the audio sampled using the microphone  20  and the audio data compressed/expanded by the CODEC  18 . 
         [0042]    The microphone (audio collecting unit)  20  includes the microphone and an amplifier circuit to collect external audio, especially an operator&#39;s voice, and output the audio data. 
         [0043]    The scanning key  21  is used by the user for commanding the image scanner  7  to start scanning the document. In addition, the control panel  6  includes a printing key etc. to command the plotter  5  to start recording an image on paper. It should be noted that keys such as the audio recording key  15 , the scanning key  21 , and the recording time setting key  16  can be hardware keys. Otherwise, if the display  17  includes a touch panel, it is possible to implement those keys as software keys. 
         [0044]    For example, a nonvolatile RAM (NVRAM) is used for the noise data memory (noise memory)  22 , and noise data corresponding to noise surrounding the MFP  1  and operating noise of the MFP  1  etc. are collected and stored in the noise data memory  22  preliminarily as noise canceling data. The main CPU  2  reads the noise canceling data corresponding to noise included in the audio data sampled using the microphone  20  from the noise data memory  22  and reduces noise from the audio data by converting the read noise canceling data into antiphase data and multiplying the audio data by the converted antiphase data. 
         [0045]    The noise data memory  22  can also store antiphase noise data as the noise canceling data. In this case, the main CPU  2  reduces noise by directly multiplying the audio data by the noise canceling data read from the noise data memory  22 . Furthermore, if the operating noise is determined as noise, the noise data memory  22  stores operating noise in various operating modes (image processing operations) of the MFP  1  or antiphase operating noise. In this case, the main CPU  2  reads the noise canceling data corresponding to the operating mode (operating status) of the MFP  1  from the noise data memory  22 . As a result, the main CPU  2  and the noise data memory  22  together function as an antiphase audio generator that generates antiphase audio of the noise, and the main CPU  2  functions as a noise reducer that reduces noise using the antiphase audio. 
         [0046]    In addition, after the main CPU  2  converts the audio sampled by the microphone  20  into appropriate audio data using the CODEC  18  and stores the converted data in the audio data memory  19 , the main CPU  2  performs an output process adding the stored data to the image data and transferring it to other terminals etc. In this case, the main CPU  2  performs an audio recording process that stores the audio data in the audio data memory  19  only if the noise included in the audio that the microphone  20  collects is equal to or less than a predetermined threshold . In addition, if the noise is larger than the threshold, the main CPU  2  performs a noise reduction process that reduces the noise at least equal to or less than the threshold and stores the processed data in the audio data memory  19 . In addition, the main CPU  2  performs an audio recording method that adds the audio data stored in the audio data memory  19  to the image data. That is, if the noise is equal to or less than the threshold, the main CPU  2  adds the audio data from the microphone  20  to the image data directly. If the noise is larger than the threshold, the main CPU  2  performs the noise reduction process that reduces the noise included in the audio data and adds the processed data to the image data. As the noise reduction process, the main CPU  2  of the MFP  1  in this embodiment performs the noise reduction process that reduces noises by multiplying the audio data by the noise canceling data stored in the noise data memory  22  directly or multiplying the audio data by the antiphase noise canceling data. 
         [0047]    Therefore, the main CPU  2  functions as an audio recording unit that stores the audio data in the audio data memory  19  as the audio memory. In addition, the main CPU  2  functions as a data editing unit that performs a data editing process that adds the audio data to the image data. Furthermore, the main CPU  2  functions as a controller that performs a control process that records audio only if the noise level included in the audio data collected by the microphone as the audio collecting unit is equal to or less than the predetermined threshold limit level. 
         [0048]    Next, operation in this embodiment are described below. The MFP  1  in this embodiment improves efficiency of the image processing operation and suppresses operating noise from getting mixed in sampling audio. 
         [0049]    The MFP  1  performs the audio recording process that converts operator&#39;s voice sampled using the microphone  20  into audio data, adds the converted data to the image data, and transfers the processed data to other terminals etc. The MFP  1  performs the image processing operation along with the audio recording process, while multiplying the noise canceling data that is antiphase of the noise sampled by the microphone  20  if noise is present. 
         [0050]    That is, as shown in  FIG. 3 , in the MFP  1  in this embodiment, after the scanning key  21  is operated (pressed) in S 101 , the main CPU  2  checks whether or not the audio recording key  15  is operated (pressed) in S 102 . 
         [0051]    In S 102 , if the audio recording key  15  is not operated (NO in S 102 ), the main CPU  2  drives the image scanner  7  to scan a document. After finishing scanning all documents in S 103 , the process ends. 
         [0052]    In S 102 , if the audio recording key  15  is operated (YES in S 102 ), the main CPU  2  determines the operating status in S 104 . If the operating data or antiphase of the operating data is stored in the noise data memory  22  corresponding to the operating mode, the operating status corresponds to the operating mode (operating status) such as printing etc. 
         [0053]    Next, the main CPU  2  checks whether or not the noise level is larger than the preset threshold in S 105 . For example, before the operator inputs voice, the main CPU  2  acquires the audio data that the microphone  20  collects, i.e., the environmental audio surrounding the MFP  1  (including the operating noise of the MFP  1  itself) as the noise and detects the environmental audio level as the noise level. In addition, the threshold limit is stored in the main ROM  3  etc. as an initial value preliminarily. Other than that, it is possible to input an allowable noise level included in the audio data using the control panel  6  etc. by user operation appropriately. 
         [0054]    In S 105 , if the noise level is equal to or less than the threshold limit (NO in S 105 ), the main CPU  2  drives the image scanner  7  to start scanning the preset documents in S 106 . 
         [0055]    After starting scanning the document, main CPU  2  instructs the microphone  20  to collect the operator&#39;s voice in S 107  and start recording audio storing the audio data of collected voice in the audio data memory  2  in S 108 . In recording the audio, it is possible that the main CPU  2  compresses data using the CODEC  18  and stores the compressed audio data in the audio data memory  19 . 
         [0056]    If a record finishing operation is performed using the audio recording key  15  by user operation or the recording time configured using the recording time setting key  16  elapses, the main CPU  2  finishes the recording process. 
         [0057]    As a result, in this case, it is possible to scan the documents and record audio under the condition that the surrounding noise is equal to or less than the threshold limit. 
         [0058]    In S 105 , if the noise level is larger than the threshold limit (YES in S 105 ), the main CPU  2  drives the image scanner  7  to start scanning the preset documents in S 109 . After starting scanning the document, the main CPU  2  instructs the microphone  20  to collect the operator&#39;s voice in S 110  and read the noise canceling data from the noise data memory  22  in S 111 . In this case, if the noise is mainly operational noise, the main CPU  2  reads the noise canceling data stored in the noise data memory  22  in accordance with the operating status acquired in S 104 . 
         [0059]    The main CPU  2  performs the noise reduction process that reduces noise from the audio data collected by the microphone  20  using the noise canceling data in S 112 . The main CPU  2  reduces noise from the audio data by generating antiphase data and multiplying the audio data by the antiphase data if the noise canceling data is not antiphase noise data. If the noise canceling data is antiphase data, the main CPU  2  reduces noise from the audio data by multiplying the audio data collected by the microphone  20  by the antiphase noise canceling data as is. 
         [0060]    The main CPU  2  starts an audio recording process storing the audio data that the noise is removed in the audio data memory  19  in S 108 . 
         [0061]    If a record finishing operation is performed using the audio recording key  15  by user operation or the recording time configured using the recording time setting key  16  elapses, the main CPU  2  finishes the recording process. 
         [0062]    As a result, in this case, it is also possible to scan the documents and record audio under the condition that the surrounding noise is equal to or less than the threshold limit. 
         [0063]    As described above, the MFP  1  in this embodiment includes the microphone (audio collecting circuit)  20  that collects audio and outputs audio data, the main CPU (audio recording unit)  2  that stores the audio data in the audio data memory (audio storage unit)  19 , the main CPU (data editing unit)  2  that adds the audio data to the image data, and the main CPU (controller)  2  that instructs the main CPU  2  as the audio recording unit to perform the audio recording operation only if the noise level included in the audio data collected by the microphone  20  is equal to or less than the predetermined threshold limit. 
         [0064]    As a result, if the noise level is equal to or less than the threshold limit level, it is possible to record audio improving efficiency of the image processing operation and suppressing noise from getting mixed in recording audio without interrupting the operation of the MFP  1 . 
         [0065]    In addition, the MFP  1  in this embodiment includes a data output circuit such as the LAN I/F  9  that outputs the image data that the main CPU  2  as the data editing unit adds the audio data at a predetermined output method. 
         [0066]    As a result, if the noise level is equal to or less than the threshold limit level, it is possible to record audio and output the image data that the audio is added improving efficiency of the image processing operation and suppressing noise from getting mixed in recording audio without interrupting the operation of the MFP  1 . 
         [0067]    In addition, the MFP  1  in this embodiment further includes the image scanner  7  that scans an image on the document and outputs the image data. If the noise level is equal to or less than the threshold limit level, the main CPU  2  as the controller performs the document scanning operation and the audio recording operation simultaneously. 
         [0068]    As a result, if the noise level is equal to or less than the threshold limit level, it is possible to scan an image and record audio improving efficiency of the image processing operation and suppressing noise from getting mixed in recording audio without interrupting the operation of the MFP  1 . 
         [0069]    The MFP  1  in this embodiment further includes the noise data memory  22  and the main CPU  2  as the antiphase audio generator that generates the antiphase audio of the noise and the main CPU (noise reducer)  2  that reduces noise using the antiphase audio. If the noise level is larger than the threshold limit level, the main CPU  2  as the controller reduces the noise so that the noise becomes equal to or less than the threshold limit level and records the audio data that the noise is reduced in the audio data memory  19 . 
         [0070]    Therefore, if the noise exceeds the threshold limit level, it is possible to record audio after reducing the noise under the threshold limit level at least. As a result, it is possible to record audio without interrupting the operation of the MFP  1 , enhancing efficiency of the image processing operation and suppressing operating noise from getting mixed in sampling audio. 
         [0071]    Furthermore, in the MFP  1  in this embodiment, the antiphase audio generator described above includes the noise data memory (a noise memory)  22  that stores the noise and the main controller (an antiphase audio converting circuit) unit  2  that converts the noise into the antiphase audio. 
         [0072]    Therefore, if the noise exceeds the threshold limit level, it is possible to record audio after reducing the noise under the threshold limit level at least easily. As a result, it is possible to record audio without interrupting the operation of the MFP  1 , enhancing efficiency of the image processing operation and suppressing operating noise from getting mixed in sampling audio. 
         [0073]    In addition, in the MFP  1  in this embodiment, the antiphase audio generator described above includes the noise data memory (an antiphase audio memory)  22  that stores antiphase audio of the noise. 
         [0074]    Therefore, if the noise exceeds the threshold limit level, it is possible to record audio after reducing the noise under the threshold limit level at least easily and more efficiently. As a result, it is possible to record audio without interrupting the operation of the MFP  1 , enhancing efficiency of the image processing operation and suppressing operating noise from getting mixed in sampling audio. 
         [0075]    Furthermore, in the MFP  1  in this embodiment, the main CPU  2  as the noise reducer mixes the antiphase audio generated by the antiphase audio generator with the voice data collected by the microphone (an audio collecting circuit)  20  to reduce the noise included in the voice data. 
         [0076]    Therefore, if the noise exceeds the threshold limit level, it is possible to record audio after reducing the noise under the threshold limit level at least easily and efficiently. As a result, it is possible to record audio without interrupting the operation of the MFP  1 , enhancing efficiency of the image processing operation and suppressing operating noise from getting mixed in sampling audio. 
       Second Embodiment 
       [0077]    A second embodiment is described below with reference to  FIGS. 4 and 5 .  FIG. 4  is a block diagram illustrating a configuration of a MFP  30  in this embodiment. 
         [0078]    It should be noted that this embodiment is applied to a MFP similar to the MFP in the first embodiment described above. Therefore, in the description of this embodiment, same symbols are assigned to the same components as the MFP  1  in the first embodiment including not only the main unit of the MFP  1  but also the control panel  6  etc. 
         [0079]    Just like the first embodiment, the MFP  30  in this embodiment includes the main CPU  2 , the main ROM  3 , the main RAM  4 , the plotter  5 , the control panel  6 , the image scanner  7 , the image memory  8 , and the LAN I/F  9  etc., including the noise data memory  31  and the noise output unit  32  etc. In the MFP  30 , units described above are connected with each other via a bus  10 . 
         [0080]    The control panel  6  has the similar configuration to the first embodiment. However, in this embodiment, it is unnecessary to include the noise data memory  22 . 
         [0081]    For example, a nonvolatile RAM (NVRAM) is used for the noise data memory (storage unit)  31 , and noise data corresponding to noise surrounding the MFP  30  and operating noise of the MFP  30  etc. are collected and stored in the noise data memory  31  preliminarily as noise canceling data. The noise data memory  22  can also store antiphase noise data as the noise canceling data. If the operating noise is the noise, the noise data memory  22  stores operating noises in various operating mode (image processing operations) of the MFP  30  or antiphase operating noise as the noise canceling data. 
         [0082]    For example, the noise output unit  32  consists of a speaker and an audio output circuit etc. and amplifies the noise canceling data stored in the noise data memory  31  in the state of antiphase audio of the noise to outside. That is, the noise output unit  32  amplifies the noise cancel audio. 
         [0083]    Next, operation in this embodiment are described below. The MFP  30  in this embodiment improves efficiency of the image processing operation and suppresses operating noise from getting mixed in sampling audio by outputting the noise canceling audio antiphase of the noise by the noise output unit  32 . 
         [0084]    The MFP  30  performs the audio recording process such as an audio added image data output process that converts operator&#39;s voice sampled using the microphone  20  into audio data, adds the converted data to the image data, and transfers the processed data to other terminals etc. under the control of the main CPU  2  as shown in  FIG. 5 . The MFP  30  ensures efficiency of the image processing operation and suppresses operating noise from getting mixed in sampling audio by performing the image processing operation along with the audio recording process outputting the noise canceling audio antiphase of the noise by the noise output unit  32 . In  FIG. 5 , same symbols are assigned to steps similar to steps in  FIG. 3 , and those descriptions are simplified. 
         [0085]    After the scanning key  21  is operated (pressed) in S 101 , the main CPU  2  checks whether or not the audio recording key is operated (pressed) in S 102 . 
         [0086]    In S 102 , if the audio recording key  15  is not operated (NO in S 102 ), the main CPU  2  drives the image scanner  7  to scan a document. After finishing scanning all documents in S 103 , the process ends. 
         [0087]    In S 102 , if the audio recording key  15  is operated (YES in S 102 ), the main CPU  2  determines the operating status in S 104  to check whether or not the noise level is larger than the predetermined threshold limit in S 105 . 
         [0088]    In S 105 , if the noise level is equal to or less than the threshold limit (NO in S 105 ), the main CPU  2  drives the image scanner  7  to start scanning the preset documents in S 106 . After starting scanning the document, main CPU  2  instructs the microphone  20  to collect the operator&#39;s voice in S 107  and start recording audio storing the audio data of collected voice in the audio data memory  2  in S 108 . 
         [0089]    If a record finishing operation is performed using the audio recording key  15  by user operation or the recording time configured using the recording time setting key  16  elapses, the main CPU  2  finishes the recording process. 
         [0090]    As a result, in this case, it is possible to scan the documents and record audio under the condition that the surrounding noise is equal to or less than the threshold limit. 
         [0091]    In S 105 , if the noise level is larger than the threshold limit (YES in S 105 ), the main CPU  2  drives the image scanner  7  to start scanning the preset documents in S 109 . After starting scanning the document, the main CPU  2  instructs the microphone  20  to collect the operator&#39;s voice in S 201  and read the noise canceling data from the noise data memory  31  in S 202 . In this case, if the noise is mainly operational noise, the main CPU  2  reads the noise canceling data stored in the noise data memory  31  in accordance with the operating status acquired in S 104 . 
         [0092]    The main CPU  2  instructs the noise output unit  32  to output the noise canceling data, the noise canceling audio antiphase of the noise, and instructs the microphone  20  to collect the voice data under the condition of reducing the noise in S 203  and S 201 . That is, if the noise canceling data is not antiphase audio data, the main CPU  2  generates antiphase data and amplifies the antiphase noise canceling audio using the noise output unit  32 . If the noise canceling data is antiphase audio data, the main CPU  2  amplifies the antiphase noise canceling audio using the noise output unit  32 . If the antiphase noise canceling audio is output, the noise is canceled by the output noise canceling audio, and the noise canceled-voice is collected by the microphone  20  as the audio data. 
         [0093]    The main CPU  2  starts an audio recording process storing the audio data that the noise is reduced in the audio data memory  19  in S 108 . 
         [0094]    If a record finishing operation is performed using the audio recording key  15  by user operation or the recording time configured using the recording time setting key  16  elapses, the main CPU  2  finishes the recording process. 
         [0095]    As a result, in this case, it is also possible to scan the documents and record audio under the condition that the surrounding noise is equal to or less than the threshold limit. 
         [0096]    As described above, in the MFP  30  in this embodiment, the main CPU  2  and the noise output unit  32  as the noise reducer amplifies the antiphase audio generated by the antiphase audio generator to the outside to reduce the noise included in the voice data collected by the microphone (an audio collecting unit)  20 . That is, the main CPU  2  reads the noise canceling data stored in the noise data memory  31  and outputs it as the noise canceling audio using the noise output unit  32  to reduce noise from the audio collected by the microphone  20 . 
         [0097]    As a result, when the microphone  20  collects audio, it is possible to reduce the noise under the threshold limit, and it is possible to record the audio whose noise is reduced under the threshold limit level at least. As a result, it is possible to record audio without interrupting the operation of the MFP  1 , enhancing efficiency of the image processing operation and suppressing operating noise from getting mixed in sampling audio. 
       Third Embodiment 
       [0098]    A third embodiment is described below with reference to  FIGS. 6 and 7 .  FIG. 6  is a block diagram illustrating a configuration of a MFP  40  in this embodiment. 
         [0099]    It should be noted that this embodiment is applied to a MFP similar to the MFP in the first embodiment described above. Therefore, in the description of this embodiment, same symbols are assigned to the same components as the MFP  1  in the first embodiment including not only the main unit of the MFP  1  but also the control panel  6  etc. 
         [0100]    Just like the first embodiment, the MFP  40  in this embodiment includes the main CPU  2 , the main ROM  3 , the main RAM  4 , the plotter  5 , the control panel  6 , the image scanner  7 , the image memory  8 , and the LAN I/F  9  etc., including a noise collecting microphone  41  and a phase-transformed noise output unit  42  etc. In the MFP  40 , units described above are connected with each other via a bus  10 . 
         [0101]    The control panel  6  has the similar configuration to the first embodiment. However, in this embodiment, it is unnecessary to include the noise data memory  22 . 
         [0102]    The noise collecting microphone (a noise collecting unit)  41  includes a microphone and an amplifier circuit etc. to sample external audio, especially surrounding noise in sampling operator&#39;s voice. 
         [0103]    The phase-transformed noise output unit  42  includes a phase transformation circuit, a speaker, and an amplifier circuit etc. to convert the noise collected by the noise collecting microphone  41  into antiphase noise, to generate phase-transformed noise canceling audio, and to amplify it. 
         [0104]    Next, workings in this embodiment are described below. The MFP  40  in this embodiment ensures efficiency of the image processing operation and suppresses operating noise from getting mixed in sampling audio by collecting noise in sampling the audio and outputting noise canceling audio antiphase of the noise. 
         [0105]    The MFP  40  performs the audio recording process that converts operator&#39;s voice sampled using the microphone  20  into audio data, adds the converted data to the image data, and transfers the processed data to other terminals etc. under the control of the main CPU  2  as shown in  FIG. 7 . The MFP  40  performs the image processing operation along with the audio recording process improving efficiency of the image processing operation and suppressing operating noise from getting mixed in sampling audio by collecting noise in sampling the audio and outputting noise canceling audio antiphase of the noise. In  FIG. 7 , same symbols are assigned to steps similar to steps in  FIG. 3 , and those descriptions are simplified. 
         [0106]    After the scanning key  21  is operated (pressed) in S 101 , the main CPU  2  checks whether or not the audio recording key is operated (pressed) in S 102 . 
         [0107]    In S 102 , if the audio recording key  15  is not operated (NO in S 102 ), the main CPU  2  drives the image scanner  7  to scan a document. After finishing scanning all documents in S 103 , the process ends. 
         [0108]    In S 102 , if the audio recording key  15  is operated (YES in S 102 ), the main CPU  2  determines the operating status in S 104  to check whether or not the noise level is larger than the predetermined threshold limit in S 105 . 
         [0109]    In S 105 , if the noise level is equal to or less than the threshold limit (NO in S 105 ), the main CPU  2  drives the image scanner  7  to start scanning the preset documents in S 106 . 
         [0110]    After starting scanning the document, main CPU  2  instructs the microphone  20  to collect the operator&#39;s voice in S 107  and start recording audio storing the audio data of collected voice in the audio data memory  2  in S 108 . 
         [0111]    If a record finishing operation is performed using the audio recording key  15  by user operation or the recording time configured using the recording time setting key  16  elapses, the main CPU  2  finishes the recording process. 
         [0112]    As a result, in this case, it is possible to scan the documents and record audio under the condition that the surrounding noise is equal to or less than the threshold limit. 
         [0113]    In S 105 , if the noise level is larger than the threshold limit (YES in S 105 ), the main CPU  2  drives the image scanner  7  to start scanning the preset documents in S 109 . After scanning the documents, the main CPU  2  instructs the microphone  20  to collect the operator&#39;s voice in S 301  and instructs the noise collecting microphone  41  to start collecting noise data in S 302 . 
         [0114]    The main CPU  2  instructs the phase-converted noise output unit  42  to convert the noise data into antiphase noise and instructs to output the phase-converted audio as the noise canceling audio in S 303 . 
         [0115]    The main CPU  2  outputs the noise canceling audio antiphase of the noise using the phase-converted noise output unit  42  and instructs the microphone  20  to collect the voice whose noise is reduced by the noise canceling audio in S 303  and S 301 . That is, the main CPU  2  amplifies the noise canceling audio antiphase of the noise collected by the noise collecting microphone  41  using the phase-converted noise output unit  42  and instructs the microphone  20  to collect the voice whose noise is reduced by the noise canceling audio. 
         [0116]    The main CPU  2  starts an audio recording process storing the audio data that the noise is removed in the audio data memory  19  in S 108 . 
         [0117]    If a record finishing operation is performed using the audio recording key  15  by user operation or the recording time configured using the recording time setting key  16  elapses, the main CPU  2  finishes the recording process. 
         [0118]    As a result, in this case, it is also possible to scan the documents and record audio under the condition that the surrounding noise is equal to or less than the threshold limit. 
         [0119]    As described above, in the MFP  40  in this embodiment, the antiphase audio generator includes a noise collecting microphone (noise collection unit)  41  that collects external noise and the phase-converted noise output unit (antiphase audio converting circuit)  42  that converts the noise collected by the noise collecting microphone  41  into antiphase audio. 
         [0120]    As a result, by generating audio antiphase of external noise in recording audio, it is possible to reduce the noise more efficiently and appropriately. As a result, it is possible to scan documents and record audio without interrupting the operation of the MFP  40 , enhancing efficiency of the image processing operation and suppressing operating noise from getting mixed in sampling audio. 
         [0121]    Numerous additional modifications and variations are possible in light of the above teachings. It is therefore to be understood that, within the scope of the appended claims, the disclosure of this patent specification may be practiced otherwise than as specifically described herein. 
         [0122]    The computer software can be provided to the programmable device using any storage medium or carrier medium for storing processor-readable code such as a floppy disk, a compact disk read only memory (CD-ROM), a digital versatile disk read only memory (DVD-ROM), DVD recording only/rewritable (DVD-R/RW), electrically erasable and programmable read only memory (EEPROM), erasable programmable read only memory (EPROM), a memory card or stick such as USB memory, a memory chip, a mini disk (MD), a magneto optical disc (MO), magnetic tape, a hard disk in a server, a solid state memory device or the like, but not limited these. The hardware platform includes any desired kind of hardware resources including, for example, a central processing unit (CPU), a random access memory (RAM), and a hard disk drive (HDD). It is also possible to download the program from an external apparatus that includes a storage medium storing the program or stores the program in a storage unit and install the program in the computer to execute the program. The CPU may be implemented by any desired kind of any desired number of processors. The RAM may be implemented by any desired kind of volatile or non-volatile memory. The HDD may be implemented by any desired kind of non-volatile memory capable of storing a large amount of data. The hardware resources may additionally include an input device, an output device, or a network device, depending on the type of apparatus. Alternatively, the HDD may be provided outside of the apparatus as long as the HDD is accessible. In this example, the CPU, such as a cache memory of the CPU, and the RAM may function as a physical memory or a primary memory of the apparatus, while the HDD may function as a secondary memory of the apparatus. 
         [0123]    In the above-described example embodiment, a computer can be used with a computer-readable program, described by object-oriented programming languages such as C++, Java (registered trademark), JavaScript (registered trademark), Perl, Ruby, or legacy programming languages such as machine language, assembler language to control functional units used for the apparatus or system. For example, a particular computer (e.g., personal computer, workstation) may control an information processing apparatus or an image processing apparatus such as image forming apparatus using a computer-readable program, which can execute the above-described processes or steps. In the above-described embodiments, at least one or more of the units of apparatus can be implemented as hardware or as a combination of hardware/software combination. 
         [0124]    Each of the functions of the described embodiments may be implemented by one or more processing circuits. A processing circuit includes a programmed processor, as a processor includes circuitry. A processing circuit also includes devices such as an application specific integrated circuit (ASIC) and conventional circuit components arranged to perform the recited functions.