Abstract:
An electronic apparatus includes a first apparatus that carries out a plurality of functions, and a second apparatus that is coupled to the first apparatus. The second apparatus comprises a control unit that includes a processing unit for supplying commands to the first apparatus for carrying out the selected one of the plurality of functions: a display driver for displaying on a display a screen utilized to select one of the plurality of functions; and a memory slot operable to receive a memory stick that includes a key file for activating at least one other function. When the key file is uninstalled, the plurality of functions executable by the first apparatus include basic functions, and alternatively when the key file is installed, the plurality of executable functions include both the basic functions and at least one other function upon the processing unit validating authorization data stored on the key file.

Description:
CROSS REFERENCES TO RELATED APPLICATIONS 
     The present invention contains subject matter related to Japanese Patent Application JP 2005-164432 filed in the Japanese Patent Office on Jun. 3, 2005, the entire contents of which being incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an electronic apparatus having a plurality of functions in which only a part of functions is generally available, remaining functions being individually made available as optional functions. Also, the present invention relates to a system for managing situations in which optional functions in such electronic apparatus are made available or unavailable. 
     2. Description of the Related Art 
     In most of electronic apparatuses, not only some basic functions are available but also optional functions are additionally made available as per user&#39;s requests. 
     In most of electronic apparatuses in which optional functions may be made available additionally, it has been customary that basic functions alone are mounted on the electronic apparatus, other apparatus having optional functions mounted thereon being attached to the electronic apparatus (see Cited Patent Reference 1, for example). 
     [Cited Patent Reference 1]: Japanese Published Patent Application No. 2002-283651 (paragraphs 0015-0017, FIG. 2) 
     SUMMARY OF THE INVENTION 
     However, as other embodiment of the electronic apparatus in which optional functions are made available additionally, there can be considered such an embodiment in which both of basic functions and optional functions are mounted on the electronic apparatus itself in advance such that basic functions alone are generally made available, the optional functions also being made available as per user&#39;s requests. 
     In the case of this embodiment, the following two conditions [a] and [b] may be considered as methods for setting the electronic apparatus to the state in which not only basic functions but also optional functions are made available. 
     [a] As software executed by a microprocessor to control the electronic apparatus, software is prepared for every electronic apparatus in accordance with user&#39;s request whether or not the user of the electronic apparatus wishes optional functions (type of optional functions if the user wishes the optional functions). 
     [b] At first, with respect to all electronic apparatuses, data that may designate only basic functions as available functions are written in advance in a memory (for example, a non-volatile RAM (random-access memory)). Then, when a user wishes optional functions, data in the above-described memory may be rewritten so as to designate optional functions as available functions with respect to user&#39;s electronic apparatus. 
     However, according to the above-described method [a], each time a user wishes different optional functions, different software should be created, which increases a load on the design section of electronic apparatus. 
     Also, according to the above-described method [b], maintenance staff should visit the user in order to rewrite data, which increases a load on the maintenance section. 
     Further, according to the above-described method [b], When data to be rewritten is leaked, data in a memory of other electronic apparatus is written without permission and there is then the possibility that optional functions will become available in other electronic apparatus without permission. Therefore, even when design section of the electronic apparatus or the like intends to manage individual electronic apparatuses and the situations in which some optional functions are available or unavailable in such electronic apparatuses, it is unavoidable that such management will become difficult. 
     In view of the aforesaid aspects, according to the present invention, an electronic apparatus with basic functions and optional functions mounted thereon can be set to the state in which optional functions become available without imposing loads on the design section and the maintenance section. Also, it becomes possible to easily manage the situations in which optional functions of each electronic apparatus are made available or unavailable. 
     In order to solve the above-mentioned problems, according to the present invention, there is provided an electronic apparatus which includes a processing unit for executing a plurality of functions, a display unit for displaying a screen to select a function, an operation unit for selecting a function from a display screen of the display unit, a control unit for controlling display on the display unit and causing the processing unit to execute a function selected by the operation unit and an external interface. Then, the control unit causes the display unit to display a screen to select only part of function of a plurality of functions in the initialization state and the control unit determines by designating a serial number of the electronic apparatus to acquire authorization data permitting a use of any remaining function of a plurality of functions through the external interface whether or not the designated serial number is matched with its own serial number. Further, the control unit causes the display unit to display a screen to select the permitted function in addition to a part of function if it is determined that the designated serial number is matched with its own serial number. 
     In this electronic apparatus, in the initialization state, the screen to select only a part of functions of a plurality of functions is displayed on the display unit and a part of functions alone can be selected by the operation unit and such selected functions can be executed (that is, the electronic apparatus is set to the state in which a part of basic functions alone are made available). 
     However, when the authorization data for permitting a use of any remaining function is acquired through the external interface by designating the serial number of the electronic apparatus, it is checked whether or not the designated serial number is matched with its own serial number of the electronic apparatus. Then, if it is determined that the designated serial number is matched with the serial number of the electronic apparatus, then the screen to select permitted optional functions in addition to the basic functions is displayed on the display unit. As a result, the permitted optional functions also can be operated by the operation unit and the selected optional functions can be executed (that is, the electronic apparatus is set to the state in which optional functions also are made available). 
     Since this authorization data is small in data amount and simple in contents, it is sufficient that the authorization data should be issued to users of electronic apparatuses in the form of being inputted through the external interface. Accordingly, without imposing the loads on the design section and the maintenance section, the electronic apparatus in which basic functions and optional functions are mounted can be set to the state in which optional functions also are made available. 
     Also, since this authorization data designates the serial number of the electronic apparatus, optional functions of an electronic apparatus with a different serial number are not made available. Accordingly, it is possible to easily manage the situations in which optional functions of each electronic apparatus are made available or unavailable. 
     This relationship applies for the electronic apparatus function selecting method according to the present invention as well. 
     According to other aspect of the present invention, there is provided an electronic apparatus management system for use with an electronic apparatus. The electronic apparatus includes a processing unit for executing more than one basic functions and more than one optional functions, a display unit for displaying a screen to select a function, an operation unit for selecting a function from a display screen of the display unit, and an external interface and a control unit for controlling display on the display unit and causing the processing unit to execute a function selected by the operation unit. The control unit causes the display unit to display a screen to select only the basic function in the initialization state, the control unit determines by designating a serial number of the electronic apparatus to acquire authorization data permitting a use of any remaining optional function through the external interface whether or not the designated serial number is matched with its own serial number and the control unit causes the display unit to display a screen to select the permitted optional function in addition to the basic functions if it is determined that the designated serial number is matched with its own serial number. The electronic apparatus management system includes the steps of creating authorization data for permitting a use of any of the optional functions by designating a serial number of the electronic apparatus used by a user in response to user&#39;s request, issuing the authorization data to the user and storing the authorization data as a database. 
     According to this management system, in exactly the same manner as has already been described with respect to the electronic apparatus of the present invention, an electronic apparatus with basic functions and optional functions mounted thereon can be set to the state in which optional functions become available without imposing loads on the design section and the maintenance section. Also, it becomes possible to easily manage the situations in which optional functions of each electronic apparatus are made available or unavailable. 
     In accordance with a further aspect of the present invention, there is provided an electronic apparatus function selection method which includes of the steps of a step for displaying a screen to select part of function of a plurality of functions of an electronic apparatus in the initialization state and a step for designating a serial number of the electronic apparatus to acquire authorization data to permit a use of any remaining function of a plurality of functions through an external interface of the electronic apparatus. Further, there is also provided with a step for determining based on the acquired authorization data whether or not the designated serial number is matched with its own serial number and displaying a screen to select the permitted function in addition to a part of function if it is determined that the designated serial number is matched with its own serial number. 
     According to the present invention, an electronic apparatus with basic functions and optional functions mounted thereon can be set to the state in which optional functions become available without imposing loads on the design section and the maintenance section. Also, it becomes possible to easily manage the situations in which optional functions of each electronic apparatus are made available or unavailable. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram showing an arrangement of an outward appearance of a VTR to which the present invention is applied; 
         FIG. 2A  is a schematic diagram showing the state in which a VTR body of the VTR shown in  FIG. 1  is attached to a broadcasting camera; 
         FIG. 2B  is a schematic diagram showing the state in which the above-mentioned VTR body is attached to a video I/O (input and output) unit; 
         FIG. 3  is a block diagram showing a circuit arrangement of the control panel shown in  FIG. 1 ; 
         FIG. 4  is a schematic diagram showing an example of a management system for managing the situation under which the optional function of the VTR body shown in  FIG. 1  is in use; 
         FIG. 5  is a flowchart showing function setting processing executed by the CPU (central processing unit) shown in  FIG. 3 ; 
         FIG. 6  is a schematic diagram showing checked results obtained when serial numbers were checked; 
         FIGS. 7A and 7B  are respectively diagrams showing examples of the display screens of the control panel shown in  FIG. 1  such that the state in which basic functions alone are available and the state in which not only basic functions but also optional functions are available are contrasted with each other; 
         FIGS. 8A and 8B  are respectively diagrams showing examples of the display screens of the control panel shown in  FIG. 1  such that the state in which basic functions alone are available and the state in which not only basic functions but also optional functions are available are contrasted with each other; 
         FIGS. 9A and 9B  are respectively diagrams showing examples of the display screens of the control panel shown in  FIG. 1  such that the state in which basic functions alone are available and the state in which not only basic functions but also optional functions are available are contrasted with each other; 
         FIGS. 10A and 10B  are respectively diagrams showing examples of the display screens of the control panel shown in  FIG. 1  such that the state in which basic functions alone are available and the state in which not only basic functions but also optional functions are available are contrasted with each other; and 
         FIG. 11  is a schematic diagram showing another example of a management system for managing the situation under which the optional functions of the VTR body shown in  FIG. 1  are in use. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Embodiments in which the present invention is applied to a portable type VTR will be described below in concrete with reference to the drawings. 
       FIG. 1  of the accompanying drawings is a schematic diagram showing an arrangement of an outward appearance of a VTR to which the present invention is applied. As shown in  FIG. 1 , a VTR has a VTR body  1  to which a control panel  2  is connected by a RS422 cable (not shown). 
     The VTR body  1  is a VTR applicable to multi-frame rate and it has a function to record and reproduce video data of a 1920×1080 image format with various frame rates such as 23.98P, 25*, 29.97P, 50i, 59.94i and a function to record and reproduce video data of a 1280×720 image format with a frame rate of 59.94P. 
     Although not shown, the VTR body  1  has a case and this case includes at its lower surface an attachment portion by which the broadcasting camera applicable to the VTR body  1  is detachably attached or the VTR body  1  is detachably attached to the upper surface of the video I/O unit and terminals by which video data can be inputted and outputted between the broadcasting camera attached to the VTR body  1  by the above attachment portion or the video I/O unit and the VTR body  1 . 
       FIGS. 2A and 2B  are schematic diagrams showing the state in which the VTR body  1  is attached to the broadcasting camera and the state in which the VTR body  1  is attached to the video I/O unit, respectively. In the state in which the VTR body  1  is attached to a broadcasting camera  21  as shown in  FIG. 2A , video data shot by the broadcasting camera  21  can be recorded on the VTR body  1 . On the other hand, a video I/O unit  22  shown in  FIG. 2B  includes a BNC terminal (not shown). In the state in which the VTR body  1  is attached to this video I/O unit  22  as shown in  FIG. 2B , video data supplied to the video I/O unit  22  from an external apparatus (not shown) through a BNC cable (not shown) can be recorded on the VTR body  1  or video data reproduced by the VTR body  1  can be supplied through the BNC cable to the external apparatus. 
     The control panel shown in  FIG. 1  is adapted to carry out various settings on the VTR body  1 . Controls such as an LCD (liquid-crystal display)  3 , a volume (variable resistor)  4 , a jog dial  5  and keys  6  are provided on the top surface of the case of the control panel  2  as shown in  FIG. 1 . These controls are used to carry out various operations such as to turn on and turn off the power supply of the control panel  2 , to select menu and functions and the like from the display screen of the LCD  3  and to enter characters and the like onto the screen of the LCD  3 . Also, an insertion slot into which a memory stick, which is a kind of a small-sized memory card, is inserted is formed on the side surface of the case of the control panel  2 . 
       FIG. 3  is a block diagram showing a circuit arrangement of the control panel  2 . As shown in  FIG. 3 , a CPU (central processing unit)  11  is connected with a memory  12 , an interface  13  to connect the controls such as the volume  4 , the jog dial  5  and the keys  6  shown in  FIG. 6 , an LCD (liquid-crystal display) driver  14  for driving the LCD  3  shown in  FIG. 1 , an RS422 interface  15  and a memory stick slot  16 . 
     The memory  12  stores therein software executed by the CPU  11  and various data may be stored in the memory  12  by the processing in the CPU  11 . 
     In the initialization state (in the state in which key file, which will be described later on, is not installed), the CPU  11  displays a screen to select only part of frame rate of the aforementioned frame rates of the VTR body  1  on the LCD  3 . 
     Further, although the VTR body  1  has a function to carry out cue-up by designating an edit-in IN, a power save function (function to control supply of electrical power to inactive circuits) and a function to write and read data between it and an IC (integrated circuit) memory attached to a video cassette, the CPU  11  may not display screens to select these functions on the LCD  3  shown in  FIG. 1  in the initialization state. 
     As described above, in the initialization state, the CPU  11  displays a screen to select only part of function (basic function) of various functions of the VTR body  1  on the LCD  3 . 
     Then, when a user operates the VTR body  1  to select a certain function from the basic functions displayed on the screen, the CPU  11  supplies a command to cause the VTR body  1  to execute the selected function through the RS422 interface  15  to the VTR body  1 . 
     As described above, in the initialization state, only the basic functions of the VTR body  1  are available. 
     Remaining functions of the VTR body  1  may individually become available as optional functions as per user&#39;s request and the like.  FIG. 4  is a schematic diagram showing a system by which the situations in which optional functions of individual VTR bodies  1  are used can be used. 
     As shown in  FIG. 4 , when a design section of the VTR body  1  and the control panel  2  (hereinafter simply referred to as a “design section”) receives a request to use any one of optional functions from a certain user, the design section causes a personal computer  31  to create data file containing the following items (a) to (f) as authorization data to permit a use of such optional function. 
     [a] Serial numbers (manufacturer&#39;s serial number of each VTR body  1 ) of one or more than two VTR bodies  1  that the user requests a use of optional function; 
     [b] Version of the control panel  2  informed only to the user; 
     [c] Version of the control panel  2  used by the user; 
     [d] Optional function requested by the user; 
     [e] Term of validity in which a use of optional function is permitted; and 
     [f] Information indicating permission of use of optional function only in the state in which the VTR body  1  is attached to the broadcasting camera as shown in  FIG. 2A . 
     Of the items [a] to [f] of the above authorization data, the items [a] and [d] are indispensable items and remaining items may be omitted. 
     A file of this authorization data is a file that becomes a key to activate inactive optional functions and hence this file will be described below as an “Activation Key” or a “Key File”. 
     Having encrypted the thus created key file in accordance with an encryption algorithm such as MD-5, the design section saves this encrypted key file in the personal computer  31  as database and it saves this encrypted key file in the memory stick  32  so that the encrypted key file may be issued to the user. 
     The user attaches this memory stick  32  to the control panel  32  and selects a menu to install the key file from the menu screen displayed on the LCD  3  of the control panel  2 . 
       FIG. 5  is a flowchart to which reference will be made in explaining function setting processing that the CPU  11  shown in  FIG. 3  executes in response to selection of this menu. 
     Referring to  FIG. 5 , and following the start of operation, control goes to a step S 1 , in which a key file is read out from the memory stick  32  through the memory stick slot  16 . Then, control goes to the next decision step S 2 , whereat it is determined whether or not the key file contains the above-described item [b] (password). 
     If the key file contains the item [b] (password) as represented by a YES at the decision step S 2 , then control goes to a step S 3 . In the step S 3 , a screen to enter a password is displayed on the LCD  3  ( FIG. 1 ). Then, control goes to the next decision step S 4 , whereat it is determined whether or not a correct password is entered into the screen. If the correct password is entered into the screen as represented by a YES at the decision step S 4 , then control goes to a step S 5 . 
     If on the other hand a password is not contained in the key file as represented by a NO at the decision step S 2 , then control goes to the step S 5 . In the step S 5 , the remaining items of the key file are checked. More specifically, information of a serial number is acquired from the VTR body  1  connected to the control panel  2  through the RS422 interface  15  ( FIG. 3 ) and it is checked whether or not the thus acquired serial number is matched with the serial number contained in the key file as the above-described item [a]. 
     If the above-described item [c] (version of the control panel  2 ) is contained in the key file, then it is checked whether or not a version of its own control panel  2  is matched with the version contained in the key file as the item [c]. 
     Also, it is checked whether or not the optional function contained in the key file as the item [d] is matched with the function that the VTR body  1  possesses as its optional function. 
     Also, if the above-described item [e] (term of validity) is contained in the key file, then it is checked whether or not the present date is matched with a date within the term of validity contained in the key file as the item [e]. 
     Further, if the above-described item [f] is contained in the key file, then information indicative of a apparatus to which the VTR body  1  is attached is acquired from the VTR body  1  connected to the control panel  2  through the RS422 interface. Then, it is checked whether or not the apparatus is the broadcasting camera. 
     Then, control goes from this step S 5  to the next decision step S 6 . In the decision step S 6 , it is determined whether or not checked results are affirmative. If the checked results are affirmative as represented by a YES at the decision step S 6 , then control goes to a step S 7 , whereat the thus read out key file is installed in the memory  12  ( FIG. 3 ). 
     Then, control goes to the next step S 8 , whereat the setting of the VTR body is changed in order to display a screen to select an optional function contained in the key file as the above-described item [d] in addition to the basic functions when various screens are displayed on the LCD  3  (that is, the VTR body is set in such a manner that, of the optional functions of the VTR body  1 , the optional function contained in the key file as the above-described item [d] can be used. Then, control is ended. 
     If a NO is outputted at the decision step S 4  or S 6 , then control goes to a step S 9 , whereat the VTR body is set in such a manner that only the basic functions of the VTR body  1  are made available similarly to the initialization state. Then, control is ended. 
     After the step S 8  was executed, if a function is selected from the optional functions displayed on the screen of the LCD  3 , then the CPU  11  supplies a command to cause the VTR body  1  to execute the selected function through the interface  15  to the VTR body  1 . Thus, the optional function of the VTR body  1  becomes available. 
     Each time the power supply of the control panel  2  is turned on after the key file was installed by the processing shown in  FIG. 5 , the CPU  11  reads out the installed key file and executes the processing in the same way as the steps S 2  to S 6  shown in  FIG. 5 . Then, if a YES is outputted at the decision step S 6 , then the same processing as that in the step S 8  is carried out. If a NO is outputted at the decision step S 4  or S 6 , then the same processing as that in the step S 9  is carried out. As described above, each time the power supply of the control panel  2  is turned on after the key file was installed by the processing shown in  FIG. 5 , the function is set by checking the key file. 
     Also, the key file installed by the processing shown in  FIG. 5  may be uninstalled by selecting a menu to uninstall the key file from the menu screen displayed on the LCD  3  of the control panel  2 . 
       FIG. 6  is a diagram showing an example of results obtained when serial numbers were checked by checking the key file in the processing shown in  FIG. 5  or when the power supply of the control panel  2  was turned on later (after the key file was installed). As shown in  FIG. 6 , if serial numbers contained in the key file as the above-described items are two serial numbers of 00001 and 00002, for example, then when the control panel  2  is connected to the VTR body  1  of which the serial number is 00001 or 00002, checked results with respect to the serial numbers are affirmative. Accordingly, if checked results of other items are affirmative, then it is possible to use optional functions of the VTR bodies  1  of the serial-numbers 00001 and 00002. 
     When on the other hand the control panel  2  is connected to the VTR body  1  of which serial number is 00003, the checked results with respect to the serial numbers are negative. Accordingly, it is not possible to use the optional function of the VTR body  1  with the serial number 00003. 
     As described above, since the key file designates the serial number of the VTR body  1 , an optional function of a VTR body  1  with a different serial number is not made available. Accordingly, it is possible for the design section to easily manage the specific serial number of the VTR body  1  and the kind of available optional functions. 
     Also, when the above-described item [e] (term of validity) is contained in the key file, even if the checked results with respect to the serial numbers are affirmative, after the term of validity was expired, it is not possible to use the optional function of the VTR body  1 . Accordingly, when it is intended to demonstrate the optional function to the user, the optional function of the VTR body  1  can be used only during a constant period. Also, when the VTR body  1  and the control panel  2 , for example, are rented to the user, it is possible to make the optional function of the VTR body  1  become available only during the rental period of the VTR body  1  and the control panel  2 . 
     Further, when the above-described item [c] (version of the control panel  2 ) is contained in the key file, the control panel  2  of which version is different from the above version is not able to use the optional function of the VTR body  1 . Accordingly, it is possible to make the optional function become available with respect to only the VTR body  1  connected to the control panel  2  of a specific version. 
       FIGS. 7A ,  7 B,  FIGS. 8A ,  8 B,  FIGS. 9A ,  9 B and  FIGS. 10A  and  10 B are respectively diagrams showing examples of the display screens of the control panel shown in  FIG. 1  such that the state in which basic functions alone are available and the state in which not only basic functions but also optional functions are available are contrasted with each other. 
       FIGS. 7A and 7B  show examples in which formats that can be selected are displayed in the form of a list. As mentioned before, the VTR body  1  has a function to record and reproduce video data of a 1920×1080 image format at various frame rates such as 23.98P, 24P, 25P, 25.97P and 50i, 59.94i and a function to record and reproduce video data of a 1280×720 image format at a frame rate of 59.94P. However, in the initialization state, as shown in  FIG. 7A , the VTR body  1  has a basic function capable of recording and reproducing video data of the 1920×1080 image format at only selected frame rates denoted by V-like check marks in  FIG. 7A . 
     On the other hand, in the state in which the optional function also is set to be available, as shown in  FIG. 7B , a variety of frame rates (frame rates denoted by V-like check marks) that can be selected with respect to video data of 1920×1080 image format can be added and video data of 1280×720 image format can be recorded and reproduced by selecting the frame rates denoted by the V-like check marks. 
       FIGS. 8A and 8B  show examples of selectable frames rates displayed when a menu “FORMAT” to select a format on the menu screen is selected.  FIG. 8A  shows examples of frame rates that can be selected in the initialization state and  FIG. 8B  shows examples of frame rates that can be selected in the state in which optional functions also are made available. In this example, as shown in  FIG. 8B , frame rates 50i and 59.94i are added as optional functions and displayed on the menu screen. 
       FIGS. 9A and 9B  show examples of menus displayed on the menu screen.  FIG. 9A  shows examples of menus displayed on the menu screen in the initialization state and  FIG. 9B  shows examples of menus displayed on the menu screen in the state in which optional functions also are made available. In this example, as shown in  FIG. 9B , “EDIT” that is a function to make cue-up by designating edit-in (IN point), “POWER” that is a power save function and “TELEFILE” that is a function to read and write data between the VTR body  1  and the IC memory attached to the video cassette are added as optional functions and displayed on the menu screen. 
       FIGS. 10A and 10B  show examples of time code portions displayed when video data is reproduced (other portions of the time code are not shown for simplicity), respectively.  FIG. 10A  shows examples of time code portions displayed on the time code screen in the initialization state and  FIG. 10B  shows examples of time code portions display on the time code screen in which an optional function also is made available. In this example, a mark-in function that is a function to designate the current time code as edit-in (IN-point) to make cue-up is made available as an optional function. As shown in  FIG. 10B , a section to display a time code designated by the mark-in function is provided on the lower right of the display position of the time codes. 
     As described above, according to the present invention, it is possible for the design section of the VTR body  1  and the control panel  2  to easily manage the specific serial number of VTR body  1  and the kind of available optional functions. 
     Then, since the key file is small in data amount and simple in contents, it can be made with ease and it can be issued to users by a suitable transportation method such as mailing in the form of the small media like the memory stick. Accordingly, without imposing loads on the design section and the maintenance section, it is possible to set the VTR body  1  to the state in which optional functions also are made available. 
     In the above-mentioned example, as shown in  FIG. 4 , the design section of the VTR body  1  and the control panel  2  creates the key file and issues the thus created key file to the users to thereby manage the situation in which optional functions of the VTR body  1  are available or unavailable. However, the present invention is not limited to the above-mentioned example and the functions to create and issue the key files and the function to manage the situation in which optional functions of the VTR body  1  are available or unavailable may be transferred to a server and thereby automated. 
       FIG. 11  is a diagram showing an example of such management system. As shown in  FIG. 11 , a server  41  for a management section, a personal computer  43  for a design section and user personal computers  44 ,  45 ,  46  . . . are connected to a network (for example, the Internet)  40 . 
     The server  41  automatically creates a key file in response to access made by a user requesting a use of optional functions. Then, the server  41  issues the thus created key file to the user personal computers  44 ,  45 ,  46  . . . via the network  40  and also saves the key file in a database  42 . 
     The user stores the key file received at the personal computer in the memory stick and the user mounts the memory stick to the control panel  2 . 
     The design section accesses the server  41  by the personal computer  43  and reads key files saved in the database  42  to thereby confirm the situations in which optional functions of individual VTR bodies  1  are available or unavailable. 
     According to this management system, without troubling the design section at all, it is possible to set the VTR body  1  to the state in which optional functions also are made available. Further, if the server  41  has accounting and settlement functions, then without troubling the design section at all, it is possible to realize a business in which key files with terms of validity are issued to all users in order to demonstrate optional functions, for example, whereafter key files for an indefinite period are issued to those who wish to use optional functions formally and accounting and settlement are executed between the management system and the user. 
     In the above-mentioned embodiments, the present invention is applied to the portable type VTR in which the control panel  2  is connected to the VTR body  1 . However, the present invention is not limited to the above-mentioned portable type VTR and may be applied to a VTR in which a VTR body and a control panel are integrally formed as one body, a frame mounted type VTR, recording and reproducing apparatus having a plurality of functions other than the VTR and electronic apparatuses having a plurality of functions other than recording and reproducing apparatus. 
     It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.